./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/sll2c_update_all.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2c_update_all.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e86102617f1813255879beda7bab492587801800e6506c4c5cd56fb9179f8713 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:13:11,353 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:13:11,358 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:13:11,402 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:13:11,403 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:13:11,404 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:13:11,406 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:13:11,408 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:13:11,411 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:13:11,412 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:13:11,413 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:13:11,415 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:13:11,416 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:13:11,417 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:13:11,419 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:13:11,420 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:13:11,422 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:13:11,423 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:13:11,425 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:13:11,427 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:13:11,429 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:13:11,433 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:13:11,435 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:13:11,437 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:13:11,442 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:13:11,450 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:13:11,450 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:13:11,452 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:13:11,453 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:13:11,454 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:13:11,455 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:13:11,457 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:13:11,458 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:13:11,460 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:13:11,462 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:13:11,462 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:13:11,463 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:13:11,463 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:13:11,464 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:13:11,465 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:13:11,465 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:13:11,466 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-20 23:13:11,515 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:13:11,521 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:13:11,521 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:13:11,522 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:13:11,523 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:13:11,523 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:13:11,524 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:13:11,524 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:13:11,524 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:13:11,524 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 23:13:11,525 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:13:11,526 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:13:11,526 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 23:13:11,526 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 23:13:11,526 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:13:11,527 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 23:13:11,527 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 23:13:11,527 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 23:13:11,528 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 23:13:11,528 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 23:13:11,528 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:13:11,529 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 23:13:11,529 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-20 23:13:11,530 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 23:13:11,531 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 23:13:11,531 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:13:11,531 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-20 23:13:11,531 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-20 23:13:11,532 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-20 23:13:11,532 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:13:11,532 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-20 23:13:11,532 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 23:13:11,533 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:13:11,533 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:13:11,533 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:13:11,533 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:13:11,534 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:13:11,534 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:13:11,534 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 23:13:11,534 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 23:13:11,535 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:13:11,535 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:13:11,535 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_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e86102617f1813255879beda7bab492587801800e6506c4c5cd56fb9179f8713 [2021-11-20 23:13:11,849 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:13:11,875 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:13:11,879 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:13:11,880 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:13:11,881 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:13:11,882 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/list-simple/sll2c_update_all.i [2021-11-20 23:13:11,948 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/data/980bd7b45/706b404f644346788bdbaf1c7f001ef8/FLAG8161f68fd [2021-11-20 23:13:12,604 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:13:12,609 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/sv-benchmarks/c/list-simple/sll2c_update_all.i [2021-11-20 23:13:12,633 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/data/980bd7b45/706b404f644346788bdbaf1c7f001ef8/FLAG8161f68fd [2021-11-20 23:13:12,851 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/data/980bd7b45/706b404f644346788bdbaf1c7f001ef8 [2021-11-20 23:13:12,854 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:13:12,856 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:13:12,857 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:13:12,858 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:13:12,863 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:13:12,864 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:13:12" (1/1) ... [2021-11-20 23:13:12,866 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@590c3f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:12, skipping insertion in model container [2021-11-20 23:13:12,868 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:13:12" (1/1) ... [2021-11-20 23:13:12,876 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:13:12,939 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:13:13,345 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/sv-benchmarks/c/list-simple/sll2c_update_all.i[24418,24431] [2021-11-20 23:13:13,353 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:13:13,366 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 23:13:13,432 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/sv-benchmarks/c/list-simple/sll2c_update_all.i[24418,24431] [2021-11-20 23:13:13,433 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:13:13,464 INFO L208 MainTranslator]: Completed translation [2021-11-20 23:13:13,465 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:13 WrapperNode [2021-11-20 23:13:13,465 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:13:13,466 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 23:13:13,466 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 23:13:13,466 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 23:13:13,473 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:13" (1/1) ... [2021-11-20 23:13:13,502 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:13" (1/1) ... [2021-11-20 23:13:13,532 INFO L137 Inliner]: procedures = 126, calls = 26, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 133 [2021-11-20 23:13:13,534 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 23:13:13,535 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 23:13:13,535 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 23:13:13,535 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 23:13:13,542 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:13" (1/1) ... [2021-11-20 23:13:13,542 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:13" (1/1) ... [2021-11-20 23:13:13,546 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:13" (1/1) ... [2021-11-20 23:13:13,546 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:13" (1/1) ... [2021-11-20 23:13:13,554 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:13" (1/1) ... [2021-11-20 23:13:13,559 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:13" (1/1) ... [2021-11-20 23:13:13,561 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:13" (1/1) ... [2021-11-20 23:13:13,578 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 23:13:13,579 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 23:13:13,579 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 23:13:13,579 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 23:13:13,580 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:13" (1/1) ... [2021-11-20 23:13:13,588 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:13:13,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:13:13,608 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 23:13:13,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 23:13:13,663 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 23:13:13,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 23:13:13,664 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-11-20 23:13:13,664 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-11-20 23:13:13,665 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 23:13:13,665 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 23:13:13,665 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 23:13:13,665 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 23:13:13,665 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 23:13:13,665 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 23:13:13,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 23:13:13,666 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 23:13:13,844 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 23:13:13,846 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 23:13:14,153 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 23:13:14,198 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 23:13:14,198 INFO L301 CfgBuilder]: Removed 6 assume(true) statements. [2021-11-20 23:13:14,201 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:13:14 BoogieIcfgContainer [2021-11-20 23:13:14,201 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 23:13:14,203 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 23:13:14,203 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 23:13:14,207 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 23:13:14,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:13:12" (1/3) ... [2021-11-20 23:13:14,208 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1891604a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:13:14, skipping insertion in model container [2021-11-20 23:13:14,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:13" (2/3) ... [2021-11-20 23:13:14,209 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1891604a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:13:14, skipping insertion in model container [2021-11-20 23:13:14,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:13:14" (3/3) ... [2021-11-20 23:13:14,210 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2c_update_all.i [2021-11-20 23:13:14,216 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 23:13:14,216 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2021-11-20 23:13:14,269 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 23:13:14,277 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 [2021-11-20 23:13:14,278 INFO L340 AbstractCegarLoop]: Starting to check reachability of 28 error locations. [2021-11-20 23:13:14,296 INFO L276 IsEmpty]: Start isEmpty. Operand has 65 states, 33 states have (on average 2.121212121212121) internal successors, (70), 61 states have internal predecessors, (70), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 23:13:14,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-20 23:13:14,305 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:13:14,306 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-20 23:13:14,306 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-20 23:13:14,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:13:14,313 INFO L85 PathProgramCache]: Analyzing trace with hash 198170915, now seen corresponding path program 1 times [2021-11-20 23:13:14,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:13:14,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845861409] [2021-11-20 23:13:14,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:14,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:13:14,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:14,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:13:14,543 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:13:14,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845861409] [2021-11-20 23:13:14,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845861409] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:13:14,545 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:13:14,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 23:13:14,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933188441] [2021-11-20 23:13:14,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:13:14,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:13:14,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:13:14,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:13:14,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:13:14,590 INFO L87 Difference]: Start difference. First operand has 65 states, 33 states have (on average 2.121212121212121) internal successors, (70), 61 states have internal predecessors, (70), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:13:14,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:13:14,721 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2021-11-20 23:13:14,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:13:14,723 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-20 23:13:14,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:13:14,731 INFO L225 Difference]: With dead ends: 63 [2021-11-20 23:13:14,731 INFO L226 Difference]: Without dead ends: 61 [2021-11-20 23:13:14,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:13:14,736 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 6 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:13:14,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 79 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:13:14,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-11-20 23:13:14,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-11-20 23:13:14,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 32 states have (on average 2.0) internal successors, (64), 57 states have internal predecessors, (64), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 23:13:14,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2021-11-20 23:13:14,774 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 5 [2021-11-20 23:13:14,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:13:14,775 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2021-11-20 23:13:14,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:13:14,775 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2021-11-20 23:13:14,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-20 23:13:14,776 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:13:14,776 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-20 23:13:14,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 23:13:14,776 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-20 23:13:14,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:13:14,777 INFO L85 PathProgramCache]: Analyzing trace with hash 198170916, now seen corresponding path program 1 times [2021-11-20 23:13:14,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:13:14,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502062881] [2021-11-20 23:13:14,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:14,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:13:14,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:14,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:13:14,844 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:13:14,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502062881] [2021-11-20 23:13:14,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502062881] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:13:14,845 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:13:14,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 23:13:14,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573645061] [2021-11-20 23:13:14,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:13:14,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:13:14,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:13:14,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:13:14,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:13:14,863 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:13:14,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:13:14,924 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2021-11-20 23:13:14,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:13:14,925 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-20 23:13:14,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:13:14,926 INFO L225 Difference]: With dead ends: 59 [2021-11-20 23:13:14,926 INFO L226 Difference]: Without dead ends: 59 [2021-11-20 23:13:14,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:13:14,929 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 2 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:13:14,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 83 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:13:14,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-20 23:13:14,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-11-20 23:13:14,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 32 states have (on average 1.9375) internal successors, (62), 55 states have internal predecessors, (62), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 23:13:14,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2021-11-20 23:13:14,938 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 5 [2021-11-20 23:13:14,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:13:14,938 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2021-11-20 23:13:14,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:13:14,939 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2021-11-20 23:13:14,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-20 23:13:14,940 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:13:14,940 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:13:14,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 23:13:14,941 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-20 23:13:14,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:13:14,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1927971198, now seen corresponding path program 1 times [2021-11-20 23:13:14,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:13:14,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925929543] [2021-11-20 23:13:14,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:14,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:13:14,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:14,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:13:15,000 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:13:15,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925929543] [2021-11-20 23:13:15,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925929543] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:13:15,000 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:13:15,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:13:15,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657783762] [2021-11-20 23:13:15,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:13:15,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:13:15,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:13:15,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:13:15,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:13:15,003 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 23:13:15,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:13:15,061 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2021-11-20 23:13:15,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:13:15,062 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-11-20 23:13:15,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:13:15,067 INFO L225 Difference]: With dead ends: 65 [2021-11-20 23:13:15,067 INFO L226 Difference]: Without dead ends: 65 [2021-11-20 23:13:15,067 INFO L932 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 [2021-11-20 23:13:15,074 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 4 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:13:15,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 95 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:13:15,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-20 23:13:15,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 60. [2021-11-20 23:13:15,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 56 states have internal predecessors, (63), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 23:13:15,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2021-11-20 23:13:15,088 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 10 [2021-11-20 23:13:15,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:13:15,089 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2021-11-20 23:13:15,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 23:13:15,089 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2021-11-20 23:13:15,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-20 23:13:15,090 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:13:15,090 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:13:15,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 23:13:15,090 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-20 23:13:15,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:13:15,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1377774572, now seen corresponding path program 1 times [2021-11-20 23:13:15,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:13:15,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144517060] [2021-11-20 23:13:15,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:15,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:13:15,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:15,198 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 23:13:15,198 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:13:15,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144517060] [2021-11-20 23:13:15,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144517060] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:13:15,199 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:13:15,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:13:15,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590796792] [2021-11-20 23:13:15,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:13:15,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:13:15,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:13:15,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:13:15,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:13:15,201 INFO L87 Difference]: Start difference. First operand 60 states and 67 transitions. Second operand has 6 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 23:13:15,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:13:15,358 INFO L93 Difference]: Finished difference Result 79 states and 87 transitions. [2021-11-20 23:13:15,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:13:15,359 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-11-20 23:13:15,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:13:15,366 INFO L225 Difference]: With dead ends: 79 [2021-11-20 23:13:15,366 INFO L226 Difference]: Without dead ends: 79 [2021-11-20 23:13:15,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 23:13:15,377 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 54 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:13:15,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 140 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:13:15,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-20 23:13:15,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 59. [2021-11-20 23:13:15,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 33 states have (on average 1.878787878787879) internal successors, (62), 55 states have internal predecessors, (62), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 23:13:15,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2021-11-20 23:13:15,389 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 17 [2021-11-20 23:13:15,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:13:15,389 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2021-11-20 23:13:15,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 23:13:15,390 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2021-11-20 23:13:15,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-20 23:13:15,391 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:13:15,391 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:13:15,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 23:13:15,391 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-20 23:13:15,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:13:15,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1377774571, now seen corresponding path program 1 times [2021-11-20 23:13:15,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:13:15,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680119175] [2021-11-20 23:13:15,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:15,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:13:15,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:15,498 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:13:15,498 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:13:15,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680119175] [2021-11-20 23:13:15,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680119175] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:13:15,499 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:13:15,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:13:15,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506486426] [2021-11-20 23:13:15,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:13:15,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:13:15,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:13:15,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:13:15,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:13:15,501 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand has 6 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 23:13:15,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:13:15,631 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2021-11-20 23:13:15,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:13:15,632 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-11-20 23:13:15,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:13:15,633 INFO L225 Difference]: With dead ends: 59 [2021-11-20 23:13:15,633 INFO L226 Difference]: Without dead ends: 59 [2021-11-20 23:13:15,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 23:13:15,635 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 54 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:13:15,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 149 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:13:15,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-20 23:13:15,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2021-11-20 23:13:15,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 54 states have internal predecessors, (61), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 23:13:15,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2021-11-20 23:13:15,642 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 17 [2021-11-20 23:13:15,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:13:15,642 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2021-11-20 23:13:15,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 23:13:15,643 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2021-11-20 23:13:15,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-20 23:13:15,643 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:13:15,644 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:13:15,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 23:13:15,644 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-20 23:13:15,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:13:15,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1191271115, now seen corresponding path program 1 times [2021-11-20 23:13:15,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:13:15,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750113097] [2021-11-20 23:13:15,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:15,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:13:15,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:15,824 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:13:15,825 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:13:15,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750113097] [2021-11-20 23:13:15,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750113097] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:13:15,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125640885] [2021-11-20 23:13:15,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:15,826 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:13:15,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:13:15,829 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:13:15,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 23:13:15,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:15,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-20 23:13:15,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:13:15,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:13:16,145 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 23:13:16,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-20 23:13:16,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:13:16,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:13:16,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125640885] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:13:16,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [236697807] [2021-11-20 23:13:16,396 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2021-11-20 23:13:16,397 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:13:16,401 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:13:16,407 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:13:16,408 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:13:16,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:13:16,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-20 23:13:16,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 23:13:16,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 23:13:16,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 23:13:16,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:13:16,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-20 23:13:16,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:13:16,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-20 23:13:16,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 23:13:17,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 23:13:17,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 23:13:17,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-20 23:13:17,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 23:13:17,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-20 23:13:17,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-20 23:13:17,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 23:13:17,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 23:13:17,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-20 23:13:17,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 23:13:18,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-11-20 23:13:18,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-11-20 23:13:18,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:13:18,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-20 23:13:18,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-20 23:13:18,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 23:13:18,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-20 23:13:18,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 23:13:18,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 23:13:18,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 23:13:18,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 23:13:18,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 23:13:18,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-20 23:13:18,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-20 23:13:19,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-11-20 23:13:19,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-11-20 23:13:19,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:13:19,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-20 23:13:19,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-20 23:13:19,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 23:13:19,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-20 23:13:19,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 23:13:19,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 23:13:19,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-20 23:13:19,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 23:13:19,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-20 23:13:19,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 23:13:19,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 23:13:20,701 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 80 for LOIs [2021-11-20 23:13:22,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 23:13:22,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:13:22,681 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Some non-self update cases but no top-level DER relation at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.DerPreprocessor.(DerPreprocessor.java:146) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:340) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne(DualJunctionSaa.java:115) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryExhaustivelyToEliminate(DualJunctionSaa.java:93) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:903) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:865) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:783) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:425) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:355) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:162) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:243) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:233) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:92) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:278) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:264) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-20 23:13:22,684 INFO L158 Benchmark]: Toolchain (without parser) took 9828.69ms. Allocated memory was 130.0MB in the beginning and 188.7MB in the end (delta: 58.7MB). Free memory was 86.9MB in the beginning and 129.1MB in the end (delta: -42.2MB). Peak memory consumption was 18.1MB. Max. memory is 16.1GB. [2021-11-20 23:13:22,685 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 130.0MB. Free memory was 105.2MB in the beginning and 105.2MB in the end (delta: 71.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 23:13:22,685 INFO L158 Benchmark]: CACSL2BoogieTranslator took 607.61ms. Allocated memory is still 130.0MB. Free memory was 86.7MB in the beginning and 96.1MB in the end (delta: -9.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-20 23:13:22,685 INFO L158 Benchmark]: Boogie Procedure Inliner took 68.25ms. Allocated memory is still 130.0MB. Free memory was 96.1MB in the beginning and 93.8MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 23:13:22,686 INFO L158 Benchmark]: Boogie Preprocessor took 43.64ms. Allocated memory is still 130.0MB. Free memory was 93.8MB in the beginning and 92.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 23:13:22,688 INFO L158 Benchmark]: RCFGBuilder took 622.22ms. Allocated memory is still 130.0MB. Free memory was 91.9MB in the beginning and 73.4MB in the end (delta: 18.5MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2021-11-20 23:13:22,688 INFO L158 Benchmark]: TraceAbstraction took 8480.67ms. Allocated memory was 130.0MB in the beginning and 188.7MB in the end (delta: 58.7MB). Free memory was 72.6MB in the beginning and 129.1MB in the end (delta: -56.5MB). Peak memory consumption was 5.6MB. Max. memory is 16.1GB. [2021-11-20 23:13:22,690 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 130.0MB. Free memory was 105.2MB in the beginning and 105.2MB in the end (delta: 71.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 607.61ms. Allocated memory is still 130.0MB. Free memory was 86.7MB in the beginning and 96.1MB in the end (delta: -9.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 68.25ms. Allocated memory is still 130.0MB. Free memory was 96.1MB in the beginning and 93.8MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 43.64ms. Allocated memory is still 130.0MB. Free memory was 93.8MB in the beginning and 92.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 622.22ms. Allocated memory is still 130.0MB. Free memory was 91.9MB in the beginning and 73.4MB in the end (delta: 18.5MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * TraceAbstraction took 8480.67ms. Allocated memory was 130.0MB in the beginning and 188.7MB in the end (delta: 58.7MB). Free memory was 72.6MB in the beginning and 129.1MB in the end (delta: -56.5MB). Peak memory consumption was 5.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Some non-self update cases but no top-level DER relation de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Some non-self update cases but no top-level DER relation: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.DerPreprocessor.(DerPreprocessor.java:146) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-20 23:13:22,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2c_update_all.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e86102617f1813255879beda7bab492587801800e6506c4c5cd56fb9179f8713 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:13:25,008 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:13:25,010 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:13:25,072 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:13:25,072 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:13:25,077 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:13:25,079 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:13:25,084 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:13:25,087 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:13:25,095 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:13:25,096 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:13:25,098 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:13:25,098 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:13:25,101 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:13:25,103 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:13:25,105 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:13:25,107 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:13:25,108 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:13:25,112 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:13:25,126 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:13:25,128 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:13:25,129 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:13:25,133 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:13:25,134 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:13:25,144 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:13:25,144 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:13:25,144 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:13:25,147 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:13:25,148 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:13:25,149 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:13:25,149 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:13:25,150 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:13:25,152 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:13:25,153 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:13:25,155 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:13:25,155 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:13:25,156 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:13:25,156 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:13:25,157 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:13:25,159 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:13:25,159 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:13:25,160 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-20 23:13:25,208 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:13:25,208 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:13:25,209 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:13:25,209 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:13:25,210 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:13:25,210 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:13:25,210 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:13:25,211 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:13:25,211 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:13:25,211 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:13:25,212 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:13:25,212 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:13:25,214 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 23:13:25,214 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 23:13:25,214 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:13:25,214 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 23:13:25,215 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-20 23:13:25,215 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 23:13:25,215 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 23:13:25,215 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:13:25,216 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-20 23:13:25,216 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-20 23:13:25,216 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-20 23:13:25,216 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:13:25,216 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-20 23:13:25,217 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-20 23:13:25,217 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-20 23:13:25,217 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 23:13:25,217 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:13:25,218 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:13:25,218 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 23:13:25,218 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:13:25,219 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:13:25,219 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:13:25,219 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:13:25,219 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-20 23:13:25,220 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-20 23:13:25,220 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:13:25,220 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:13:25,220 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e86102617f1813255879beda7bab492587801800e6506c4c5cd56fb9179f8713 [2021-11-20 23:13:25,590 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:13:25,617 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:13:25,620 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:13:25,621 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:13:25,622 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:13:25,624 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/list-simple/sll2c_update_all.i [2021-11-20 23:13:25,706 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/data/28c0e26d4/cae25cf671ce4c599f7b7f5516455dc4/FLAGb2358fd35 [2021-11-20 23:13:26,320 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:13:26,321 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/sv-benchmarks/c/list-simple/sll2c_update_all.i [2021-11-20 23:13:26,341 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/data/28c0e26d4/cae25cf671ce4c599f7b7f5516455dc4/FLAGb2358fd35 [2021-11-20 23:13:26,637 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/data/28c0e26d4/cae25cf671ce4c599f7b7f5516455dc4 [2021-11-20 23:13:26,641 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:13:26,643 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:13:26,647 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:13:26,647 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:13:26,651 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:13:26,652 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:13:26" (1/1) ... [2021-11-20 23:13:26,654 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72c243f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:26, skipping insertion in model container [2021-11-20 23:13:26,654 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:13:26" (1/1) ... [2021-11-20 23:13:26,662 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:13:26,722 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:13:27,130 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/sv-benchmarks/c/list-simple/sll2c_update_all.i[24418,24431] [2021-11-20 23:13:27,137 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:13:27,162 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 23:13:27,235 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/sv-benchmarks/c/list-simple/sll2c_update_all.i[24418,24431] [2021-11-20 23:13:27,239 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:13:27,290 INFO L208 MainTranslator]: Completed translation [2021-11-20 23:13:27,290 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:27 WrapperNode [2021-11-20 23:13:27,291 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:13:27,292 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 23:13:27,292 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 23:13:27,293 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 23:13:27,300 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:27" (1/1) ... [2021-11-20 23:13:27,343 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:27" (1/1) ... [2021-11-20 23:13:27,385 INFO L137 Inliner]: procedures = 129, calls = 26, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 133 [2021-11-20 23:13:27,385 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 23:13:27,386 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 23:13:27,387 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 23:13:27,387 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 23:13:27,395 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:27" (1/1) ... [2021-11-20 23:13:27,395 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:27" (1/1) ... [2021-11-20 23:13:27,412 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:27" (1/1) ... [2021-11-20 23:13:27,413 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:27" (1/1) ... [2021-11-20 23:13:27,423 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:27" (1/1) ... [2021-11-20 23:13:27,440 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:27" (1/1) ... [2021-11-20 23:13:27,446 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:27" (1/1) ... [2021-11-20 23:13:27,459 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 23:13:27,460 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 23:13:27,460 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 23:13:27,460 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 23:13:27,461 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:27" (1/1) ... [2021-11-20 23:13:27,471 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:13:27,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:13:27,492 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 23:13:27,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 23:13:27,527 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-20 23:13:27,527 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-11-20 23:13:27,528 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-11-20 23:13:27,528 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 23:13:27,528 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 23:13:27,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 23:13:27,528 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 23:13:27,529 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 23:13:27,529 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-20 23:13:27,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-20 23:13:27,540 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 23:13:27,540 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 23:13:27,654 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 23:13:27,656 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 23:13:28,177 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 23:13:28,184 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 23:13:28,184 INFO L301 CfgBuilder]: Removed 6 assume(true) statements. [2021-11-20 23:13:28,186 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:13:28 BoogieIcfgContainer [2021-11-20 23:13:28,187 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 23:13:28,188 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 23:13:28,189 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 23:13:28,191 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 23:13:28,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:13:26" (1/3) ... [2021-11-20 23:13:28,192 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3624bc0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:13:28, skipping insertion in model container [2021-11-20 23:13:28,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:27" (2/3) ... [2021-11-20 23:13:28,193 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3624bc0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:13:28, skipping insertion in model container [2021-11-20 23:13:28,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:13:28" (3/3) ... [2021-11-20 23:13:28,194 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2c_update_all.i [2021-11-20 23:13:28,199 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 23:13:28,199 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2021-11-20 23:13:28,243 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 23:13:28,249 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 [2021-11-20 23:13:28,250 INFO L340 AbstractCegarLoop]: Starting to check reachability of 28 error locations. [2021-11-20 23:13:28,265 INFO L276 IsEmpty]: Start isEmpty. Operand has 83 states, 51 states have (on average 1.8431372549019607) internal successors, (94), 79 states have internal predecessors, (94), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 23:13:28,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-20 23:13:28,272 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:13:28,272 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-20 23:13:28,273 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-20 23:13:28,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:13:28,278 INFO L85 PathProgramCache]: Analyzing trace with hash 894505749, now seen corresponding path program 1 times [2021-11-20 23:13:28,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:13:28,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1660302193] [2021-11-20 23:13:28,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:28,291 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:13:28,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:13:28,294 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:13:28,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-20 23:13:28,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:28,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 23:13:28,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:13:28,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:13:28,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:13:28,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:13:28,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:13:28,554 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:13:28,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1660302193] [2021-11-20 23:13:28,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1660302193] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:13:28,556 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:13:28,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-20 23:13:28,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481414568] [2021-11-20 23:13:28,560 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:13:28,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:13:28,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:13:28,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:13:28,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:13:28,602 INFO L87 Difference]: Start difference. First operand has 83 states, 51 states have (on average 1.8431372549019607) internal successors, (94), 79 states have internal predecessors, (94), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:13:28,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:13:28,770 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2021-11-20 23:13:28,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:13:28,773 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-20 23:13:28,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:13:28,781 INFO L225 Difference]: With dead ends: 81 [2021-11-20 23:13:28,781 INFO L226 Difference]: Without dead ends: 78 [2021-11-20 23:13:28,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:13:28,786 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 8 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:13:28,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 135 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:13:28,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-20 23:13:28,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-11-20 23:13:28,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 49 states have (on average 1.653061224489796) internal successors, (81), 74 states have internal predecessors, (81), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 23:13:28,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 85 transitions. [2021-11-20 23:13:28,828 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 85 transitions. Word has length 6 [2021-11-20 23:13:28,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:13:28,828 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 85 transitions. [2021-11-20 23:13:28,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:13:28,829 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 85 transitions. [2021-11-20 23:13:28,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-20 23:13:28,829 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:13:28,830 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-20 23:13:28,846 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-20 23:13:29,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:13:29,047 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-20 23:13:29,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:13:29,050 INFO L85 PathProgramCache]: Analyzing trace with hash 894505750, now seen corresponding path program 1 times [2021-11-20 23:13:29,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:13:29,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [155155593] [2021-11-20 23:13:29,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:29,056 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:13:29,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:13:29,057 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:13:29,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-20 23:13:29,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:29,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 23:13:29,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:13:29,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:13:29,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:13:29,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:13:29,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:13:29,268 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:13:29,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [155155593] [2021-11-20 23:13:29,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [155155593] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:13:29,269 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:13:29,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-20 23:13:29,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679310566] [2021-11-20 23:13:29,269 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:13:29,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:13:29,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:13:29,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:13:29,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:13:29,272 INFO L87 Difference]: Start difference. First operand 78 states and 85 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:13:29,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:13:29,516 INFO L93 Difference]: Finished difference Result 76 states and 83 transitions. [2021-11-20 23:13:29,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:13:29,518 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-20 23:13:29,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:13:29,519 INFO L225 Difference]: With dead ends: 76 [2021-11-20 23:13:29,520 INFO L226 Difference]: Without dead ends: 76 [2021-11-20 23:13:29,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:13:29,522 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 8 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:13:29,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 137 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:13:29,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-20 23:13:29,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-11-20 23:13:29,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 49 states have (on average 1.6122448979591837) internal successors, (79), 72 states have internal predecessors, (79), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 23:13:29,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 83 transitions. [2021-11-20 23:13:29,532 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 83 transitions. Word has length 6 [2021-11-20 23:13:29,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:13:29,532 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 83 transitions. [2021-11-20 23:13:29,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:13:29,532 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 83 transitions. [2021-11-20 23:13:29,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-20 23:13:29,534 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:13:29,534 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:13:29,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-20 23:13:29,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:13:29,747 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-20 23:13:29,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:13:29,747 INFO L85 PathProgramCache]: Analyzing trace with hash -835957545, now seen corresponding path program 1 times [2021-11-20 23:13:29,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:13:29,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [460647783] [2021-11-20 23:13:29,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:29,748 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:13:29,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:13:29,751 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:13:29,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-20 23:13:29,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:29,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 23:13:29,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:13:29,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:13:29,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:13:30,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:13:30,022 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:13:30,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [460647783] [2021-11-20 23:13:30,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [460647783] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:13:30,023 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:13:30,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-20 23:13:30,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536303246] [2021-11-20 23:13:30,026 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:13:30,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:13:30,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:13:30,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:13:30,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:13:30,029 INFO L87 Difference]: Start difference. First operand 76 states and 83 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 23:13:30,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:13:30,061 INFO L93 Difference]: Finished difference Result 83 states and 91 transitions. [2021-11-20 23:13:30,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:13:30,062 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 13 [2021-11-20 23:13:30,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:13:30,064 INFO L225 Difference]: With dead ends: 83 [2021-11-20 23:13:30,064 INFO L226 Difference]: Without dead ends: 83 [2021-11-20 23:13:30,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:13:30,066 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 9 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:13:30,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 230 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:13:30,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-20 23:13:30,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 77. [2021-11-20 23:13:30,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 50 states have (on average 1.6) internal successors, (80), 73 states have internal predecessors, (80), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 23:13:30,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 84 transitions. [2021-11-20 23:13:30,079 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 84 transitions. Word has length 13 [2021-11-20 23:13:30,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:13:30,079 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 84 transitions. [2021-11-20 23:13:30,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 23:13:30,080 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 84 transitions. [2021-11-20 23:13:30,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-20 23:13:30,080 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:13:30,081 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:13:30,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-20 23:13:30,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:13:30,292 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-20 23:13:30,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:13:30,293 INFO L85 PathProgramCache]: Analyzing trace with hash -125034980, now seen corresponding path program 1 times [2021-11-20 23:13:30,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:13:30,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [50700344] [2021-11-20 23:13:30,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:30,294 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:13:30,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:13:30,295 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:13:30,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-20 23:13:30,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:30,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 23:13:30,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:13:30,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:13:30,514 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:13:30,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:13:30,628 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:13:30,628 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:13:30,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [50700344] [2021-11-20 23:13:30,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [50700344] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:13:30,635 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:13:30,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-20 23:13:30,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142630957] [2021-11-20 23:13:30,635 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:13:30,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:13:30,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:13:30,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:13:30,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:13:30,637 INFO L87 Difference]: Start difference. First operand 77 states and 84 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 23:13:30,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:13:30,978 INFO L93 Difference]: Finished difference Result 97 states and 105 transitions. [2021-11-20 23:13:30,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:13:30,980 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2021-11-20 23:13:30,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:13:30,983 INFO L225 Difference]: With dead ends: 97 [2021-11-20 23:13:30,983 INFO L226 Difference]: Without dead ends: 97 [2021-11-20 23:13:30,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 23:13:30,984 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 68 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:13:30,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 227 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 23:13:30,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-11-20 23:13:30,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 76. [2021-11-20 23:13:31,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 50 states have (on average 1.58) internal successors, (79), 72 states have internal predecessors, (79), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 23:13:31,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 83 transitions. [2021-11-20 23:13:31,003 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 83 transitions. Word has length 22 [2021-11-20 23:13:31,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:13:31,005 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 83 transitions. [2021-11-20 23:13:31,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 23:13:31,006 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 83 transitions. [2021-11-20 23:13:31,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-20 23:13:31,007 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:13:31,007 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:13:31,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-20 23:13:31,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:13:31,208 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-20 23:13:31,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:13:31,209 INFO L85 PathProgramCache]: Analyzing trace with hash -125034979, now seen corresponding path program 1 times [2021-11-20 23:13:31,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:13:31,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [442696983] [2021-11-20 23:13:31,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:31,210 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:13:31,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:13:31,216 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:13:31,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-20 23:13:31,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:31,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 23:13:31,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:13:31,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:13:31,462 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:13:31,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:13:31,874 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:13:31,874 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:13:31,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [442696983] [2021-11-20 23:13:31,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [442696983] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:13:31,875 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:13:31,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-20 23:13:31,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180243315] [2021-11-20 23:13:31,875 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:13:31,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 23:13:31,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:13:31,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 23:13:31,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-20 23:13:31,877 INFO L87 Difference]: Start difference. First operand 76 states and 83 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 23:13:32,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:13:32,510 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2021-11-20 23:13:32,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:13:32,511 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2021-11-20 23:13:32,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:13:32,512 INFO L225 Difference]: With dead ends: 76 [2021-11-20 23:13:32,512 INFO L226 Difference]: Without dead ends: 76 [2021-11-20 23:13:32,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-20 23:13:32,513 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 69 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 23:13:32,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 353 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 23:13:32,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-20 23:13:32,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2021-11-20 23:13:32,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.56) internal successors, (78), 71 states have internal predecessors, (78), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 23:13:32,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 82 transitions. [2021-11-20 23:13:32,521 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 82 transitions. Word has length 22 [2021-11-20 23:13:32,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:13:32,522 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 82 transitions. [2021-11-20 23:13:32,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 23:13:32,522 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 82 transitions. [2021-11-20 23:13:32,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-20 23:13:32,523 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:13:32,523 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:13:32,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-20 23:13:32,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:13:32,749 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-20 23:13:32,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:13:32,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1180454715, now seen corresponding path program 1 times [2021-11-20 23:13:32,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:13:32,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1476447204] [2021-11-20 23:13:32,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:32,750 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:13:32,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:13:32,751 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:13:32,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-20 23:13:32,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:32,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 23:13:32,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:13:32,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:13:33,101 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-20 23:13:33,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 30 [2021-11-20 23:13:33,283 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:13:33,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:13:54,370 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:13:54,371 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:13:54,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1476447204] [2021-11-20 23:13:54,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1476447204] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:13:54,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [382922164] [2021-11-20 23:13:54,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:54,372 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-20 23:13:54,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-20 23:13:54,390 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-20 23:13:54,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-20 23:13:54,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:54,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 23:13:54,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:13:54,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:13:58,755 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-20 23:13:58,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 21 [2021-11-20 23:13:58,869 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:13:58,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:14:07,273 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:14:07,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [382922164] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 23:14:07,273 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-20 23:14:07,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8, 8, 6] total 18 [2021-11-20 23:14:07,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003951552] [2021-11-20 23:14:07,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:14:07,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 23:14:07,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:14:07,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 23:14:07,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=272, Unknown=11, NotChecked=0, Total=342 [2021-11-20 23:14:07,276 INFO L87 Difference]: Start difference. First operand 75 states and 82 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 23:14:09,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:14:09,653 INFO L93 Difference]: Finished difference Result 94 states and 101 transitions. [2021-11-20 23:14:09,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 23:14:09,654 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2021-11-20 23:14:09,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:14:09,655 INFO L225 Difference]: With dead ends: 94 [2021-11-20 23:14:09,655 INFO L226 Difference]: Without dead ends: 94 [2021-11-20 23:14:09,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 71 SyntacticMatches, 8 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 34.9s TimeCoverageRelationStatistics Valid=69, Invalid=299, Unknown=12, NotChecked=0, Total=380 [2021-11-20 23:14:09,657 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 64 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:14:09,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 348 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 190 Invalid, 0 Unknown, 20 Unchecked, 0.3s Time] [2021-11-20 23:14:09,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-20 23:14:09,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 74. [2021-11-20 23:14:09,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 50 states have (on average 1.54) internal successors, (77), 70 states have internal predecessors, (77), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 23:14:09,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 81 transitions. [2021-11-20 23:14:09,665 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 81 transitions. Word has length 25 [2021-11-20 23:14:09,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:14:09,666 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 81 transitions. [2021-11-20 23:14:09,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 23:14:09,666 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 81 transitions. [2021-11-20 23:14:09,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-20 23:14:09,668 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:14:09,668 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:14:09,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-20 23:14:09,881 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (8)] Ended with exit code 0 [2021-11-20 23:14:10,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-20 23:14:10,080 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-20 23:14:10,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:14:10,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1180454714, now seen corresponding path program 1 times [2021-11-20 23:14:10,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:14:10,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1529146140] [2021-11-20 23:14:10,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:14:10,081 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:14:10,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:14:10,089 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:14:10,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-20 23:14:10,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:14:10,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-20 23:14:10,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:14:10,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:14:10,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:14:10,644 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 23:14:10,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2021-11-20 23:14:10,660 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 23:14:10,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-20 23:14:10,821 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:14:10,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:14:28,685 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_6| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_49| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_2| (_ BitVec 32))) (or (let ((.cse0 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_2|))) (and (bvule |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_2| .cse0) (bvule .cse0 (select (store |c_#length| |v_node_create_~temp~0#1.base_49| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_6|)))) (not (= (_ bv0 1) (select |c_#valid| |v_node_create_~temp~0#1.base_49|))) (exists ((|v_node_create_~temp~0#1.base_48| (_ BitVec 32))) (and (let ((.cse1 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_2|))) (or (not (bvule .cse1 (select (store |c_old(#length)| |v_node_create_~temp~0#1.base_48| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_6|))) (not (bvule |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_2| .cse1)))) (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_48|)))))))) is different from false [2021-11-20 23:14:32,569 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:14:32,569 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:14:32,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1529146140] [2021-11-20 23:14:32,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1529146140] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:14:32,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1286160507] [2021-11-20 23:14:32,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:14:32,570 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-20 23:14:32,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-20 23:14:32,577 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-20 23:14:32,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-20 23:14:32,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:14:32,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-20 23:14:32,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:14:32,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:14:32,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:14:33,094 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 23:14:33,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2021-11-20 23:14:33,108 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 23:14:33,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2021-11-20 23:14:33,210 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:14:33,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:14:50,590 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_4| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_57| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_8| (_ BitVec 32))) (or (exists ((|v_node_create_~temp~0#1.base_48| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_48|))))) (let ((.cse0 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_4|))) (or (not (bvule |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_4| .cse0)) (not (bvule .cse0 (select (store |c_old(#length)| |v_node_create_~temp~0#1.base_48| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_8|))))))) (let ((.cse1 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_4|))) (and (bvule |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_4| .cse1) (bvule .cse1 (select (store |c_#length| |v_node_create_~temp~0#1.base_57| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_8|)))) (not (= (_ bv0 1) (select |c_#valid| |v_node_create_~temp~0#1.base_57|))))) is different from false [2021-11-20 23:14:51,164 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:14:51,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1286160507] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:14:51,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214550067] [2021-11-20 23:14:51,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:14:51,164 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:14:51,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:14:51,166 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:14:51,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 23:14:51,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:14:51,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-20 23:14:51,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:14:51,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:14:54,347 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 23:14:54,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-20 23:14:54,360 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 23:14:54,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 31 [2021-11-20 23:14:54,461 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:14:54,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:15:12,475 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_6| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_65| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_10| (_ BitVec 32))) (or (let ((.cse0 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_6|))) (and (bvule |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_6| .cse0) (bvule .cse0 (select (store |c_#length| |v_node_create_~temp~0#1.base_65| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_10|)))) (not (= (_ bv0 1) (select |c_#valid| |v_node_create_~temp~0#1.base_65|))) (exists ((|v_node_create_~temp~0#1.base_48| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_48|))))) (let ((.cse1 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_6|))) (or (not (bvule |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_6| .cse1)) (not (bvule .cse1 (select (store |c_old(#length)| |v_node_create_~temp~0#1.base_48| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_10|))))))))) is different from false [2021-11-20 23:15:12,931 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-20 23:15:12,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2021-11-20 23:15:15,379 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:15:15,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214550067] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:15:15,380 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-20 23:15:15,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 9, 9] total 21 [2021-11-20 23:15:15,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720591117] [2021-11-20 23:15:15,380 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-20 23:15:15,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-20 23:15:15,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:15:15,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-20 23:15:15,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=279, Unknown=19, NotChecked=108, Total=462 [2021-11-20 23:15:15,383 INFO L87 Difference]: Start difference. First operand 74 states and 81 transitions. Second operand has 22 states, 21 states have (on average 2.761904761904762) internal successors, (58), 16 states have internal predecessors, (58), 3 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-20 23:15:17,545 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_old(#valid)| |c_#valid|) (forall ((|v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_4| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_57| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_8| (_ BitVec 32))) (or (exists ((|v_node_create_~temp~0#1.base_48| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_48|))))) (let ((.cse0 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_4|))) (or (not (bvule |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_4| .cse0)) (not (bvule .cse0 (select (store |c_old(#length)| |v_node_create_~temp~0#1.base_48| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_8|))))))) (let ((.cse1 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_4|))) (and (bvule |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_4| .cse1) (bvule .cse1 (select (store |c_#length| |v_node_create_~temp~0#1.base_57| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_8|)))) (not (= (_ bv0 1) (select |c_#valid| |v_node_create_~temp~0#1.base_57|))))) (= |c_#length| |c_old(#length)|) (forall ((|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_6| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_49| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_2| (_ BitVec 32))) (or (let ((.cse2 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_2|))) (and (bvule |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_2| .cse2) (bvule .cse2 (select (store |c_#length| |v_node_create_~temp~0#1.base_49| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_6|)))) (not (= (_ bv0 1) (select |c_#valid| |v_node_create_~temp~0#1.base_49|))) (exists ((|v_node_create_~temp~0#1.base_48| (_ BitVec 32))) (and (let ((.cse3 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_2|))) (or (not (bvule .cse3 (select (store |c_old(#length)| |v_node_create_~temp~0#1.base_48| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_6|))) (not (bvule |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_2| .cse3)))) (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_48|)))))))) (forall ((|v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_6| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_65| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_10| (_ BitVec 32))) (or (let ((.cse4 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_6|))) (and (bvule |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_6| .cse4) (bvule .cse4 (select (store |c_#length| |v_node_create_~temp~0#1.base_65| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_10|)))) (not (= (_ bv0 1) (select |c_#valid| |v_node_create_~temp~0#1.base_65|))) (exists ((|v_node_create_~temp~0#1.base_48| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_48|))))) (let ((.cse5 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_6|))) (or (not (bvule |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_6| .cse5)) (not (bvule .cse5 (select (store |c_old(#length)| |v_node_create_~temp~0#1.base_48| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_10|)))))))))) is different from false [2021-11-20 23:15:19,567 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_4| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_57| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_8| (_ BitVec 32))) (or (exists ((|v_node_create_~temp~0#1.base_48| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_48|))))) (let ((.cse0 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_4|))) (or (not (bvule |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_4| .cse0)) (not (bvule .cse0 (select (store |c_old(#length)| |v_node_create_~temp~0#1.base_48| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_8|))))))) (let ((.cse1 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_4|))) (and (bvule |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_4| .cse1) (bvule .cse1 (select (store |c_#length| |v_node_create_~temp~0#1.base_57| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_8|)))) (not (= (_ bv0 1) (select |c_#valid| |v_node_create_~temp~0#1.base_57|))))) (forall ((|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_6| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_49| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_2| (_ BitVec 32))) (or (let ((.cse2 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_2|))) (and (bvule |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_2| .cse2) (bvule .cse2 (select (store |c_#length| |v_node_create_~temp~0#1.base_49| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_6|)))) (not (= (_ bv0 1) (select |c_#valid| |v_node_create_~temp~0#1.base_49|))) (exists ((|v_node_create_~temp~0#1.base_48| (_ BitVec 32))) (and (let ((.cse3 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_2|))) (or (not (bvule .cse3 (select (store |c_old(#length)| |v_node_create_~temp~0#1.base_48| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_6|))) (not (bvule |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_2| .cse3)))) (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_48|)))))))) (forall ((|v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_6| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_65| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_10| (_ BitVec 32))) (or (let ((.cse4 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_6|))) (and (bvule |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_6| .cse4) (bvule .cse4 (select (store |c_#length| |v_node_create_~temp~0#1.base_65| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_10|)))) (not (= (_ bv0 1) (select |c_#valid| |v_node_create_~temp~0#1.base_65|))) (exists ((|v_node_create_~temp~0#1.base_48| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_48|))))) (let ((.cse5 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_6|))) (or (not (bvule |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_6| .cse5)) (not (bvule .cse5 (select (store |c_old(#length)| |v_node_create_~temp~0#1.base_48| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_10|)))))))))) is different from false [2021-11-20 23:15:21,607 WARN L838 $PredicateComparison]: unable to prove that (and (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (select |c_#valid| |c_node_create_~temp~0#1.base|)))) (forall ((|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_6| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_2| (_ BitVec 32))) (or (let ((.cse0 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_2|))) (and (bvule .cse0 (select |c_#length| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_6|)) (bvule |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_2| .cse0))) (exists ((|v_node_create_~temp~0#1.base_48| (_ BitVec 32))) (and (let ((.cse1 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_2|))) (or (not (bvule .cse1 (select (store |c_old(#length)| |v_node_create_~temp~0#1.base_48| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_6|))) (not (bvule |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_2| .cse1)))) (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_48|)))))))) (= |c_node_create_~temp~0#1.offset| (_ bv0 32)) (= (_ bv8 32) (select |c_#length| |c_node_create_~temp~0#1.base|)) (forall ((|v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_6| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_10| (_ BitVec 32))) (or (let ((.cse2 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_6|))) (and (bvule |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_6| .cse2) (bvule .cse2 (select |c_#length| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_10|)))) (exists ((|v_node_create_~temp~0#1.base_48| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_48|))))) (let ((.cse3 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_6|))) (or (not (bvule |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_6| .cse3)) (not (bvule .cse3 (select (store |c_old(#length)| |v_node_create_~temp~0#1.base_48| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_10|)))))))))) is different from false [2021-11-20 23:15:23,697 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_6| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_2| (_ BitVec 32))) (or (let ((.cse0 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_2|))) (and (bvule .cse0 (select |c_#length| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_6|)) (bvule |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_2| .cse0))) (exists ((|v_node_create_~temp~0#1.base_48| (_ BitVec 32))) (and (let ((.cse1 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_2|))) (or (not (bvule .cse1 (select (store |c_old(#length)| |v_node_create_~temp~0#1.base_48| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_6|))) (not (bvule |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_2| .cse1)))) (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_48|)))))))) (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| |c_node_create_#res#1.base|)) (_ bv1 1))) (= |c_node_create_#res#1.offset| (_ bv0 32)) (forall ((|v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_6| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_10| (_ BitVec 32))) (or (let ((.cse2 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_6|))) (and (bvule |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_6| .cse2) (bvule .cse2 (select |c_#length| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_10|)))) (exists ((|v_node_create_~temp~0#1.base_48| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_48|))))) (let ((.cse3 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_6|))) (or (not (bvule |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_6| .cse3)) (not (bvule .cse3 (select (store |c_old(#length)| |v_node_create_~temp~0#1.base_48| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_10|))))))))) (= (_ bv8 32) (select |c_#length| |c_node_create_#res#1.base|))) is different from false [2021-11-20 23:15:23,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:15:23,945 INFO L93 Difference]: Finished difference Result 102 states and 112 transitions. [2021-11-20 23:15:23,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 23:15:23,946 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.761904761904762) internal successors, (58), 16 states have internal predecessors, (58), 3 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 25 [2021-11-20 23:15:23,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:15:23,948 INFO L225 Difference]: With dead ends: 102 [2021-11-20 23:15:23,948 INFO L226 Difference]: Without dead ends: 102 [2021-11-20 23:15:23,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 122 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 61.3s TimeCoverageRelationStatistics Valid=82, Invalid=343, Unknown=23, NotChecked=308, Total=756 [2021-11-20 23:15:23,949 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 7 mSDsluCounter, 698 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 773 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 378 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:15:23,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 773 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 378 Unchecked, 0.3s Time] [2021-11-20 23:15:23,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-11-20 23:15:23,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 99. [2021-11-20 23:15:23,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 71 states have (on average 1.408450704225352) internal successors, (100), 91 states have internal predecessors, (100), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 23:15:23,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 108 transitions. [2021-11-20 23:15:23,977 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 108 transitions. Word has length 25 [2021-11-20 23:15:23,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:15:23,978 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 108 transitions. [2021-11-20 23:15:23,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.761904761904762) internal successors, (58), 16 states have internal predecessors, (58), 3 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-20 23:15:23,978 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 108 transitions. [2021-11-20 23:15:23,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-20 23:15:23,979 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:15:23,980 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:15:24,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 23:15:24,192 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-20 23:15:24,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-20 23:15:24,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-20 23:15:24,581 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-20 23:15:24,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:15:24,582 INFO L85 PathProgramCache]: Analyzing trace with hash 2031866825, now seen corresponding path program 1 times [2021-11-20 23:15:24,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:15:24,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [796373204] [2021-11-20 23:15:24,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:15:24,582 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:15:24,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:15:24,583 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:15:24,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-20 23:15:24,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:15:24,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 23:15:24,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:15:24,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:15:24,923 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:15:24,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:15:25,137 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:15:25,137 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:15:25,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [796373204] [2021-11-20 23:15:25,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [796373204] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:15:25,138 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:15:25,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 9 [2021-11-20 23:15:25,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373863159] [2021-11-20 23:15:25,138 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:15:25,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 23:15:25,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:15:25,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 23:15:25,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-20 23:15:25,140 INFO L87 Difference]: Start difference. First operand 99 states and 108 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 23:15:26,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:15:26,294 INFO L93 Difference]: Finished difference Result 167 states and 181 transitions. [2021-11-20 23:15:26,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 23:15:26,294 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2021-11-20 23:15:26,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:15:26,296 INFO L225 Difference]: With dead ends: 167 [2021-11-20 23:15:26,296 INFO L226 Difference]: Without dead ends: 167 [2021-11-20 23:15:26,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 45 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-11-20 23:15:26,297 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 313 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:15:26,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [313 Valid, 423 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-20 23:15:26,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-11-20 23:15:26,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 102. [2021-11-20 23:15:26,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 74 states have (on average 1.4324324324324325) internal successors, (106), 94 states have internal predecessors, (106), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 23:15:26,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 114 transitions. [2021-11-20 23:15:26,307 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 114 transitions. Word has length 30 [2021-11-20 23:15:26,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:15:26,308 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 114 transitions. [2021-11-20 23:15:26,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 23:15:26,308 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 114 transitions. [2021-11-20 23:15:26,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-20 23:15:26,309 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:15:26,310 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:15:26,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-20 23:15:26,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:15:26,521 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-20 23:15:26,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:15:26,522 INFO L85 PathProgramCache]: Analyzing trace with hash 2031866826, now seen corresponding path program 1 times [2021-11-20 23:15:26,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:15:26,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1909027670] [2021-11-20 23:15:26,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:15:26,523 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:15:26,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:15:26,524 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:15:26,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-20 23:15:26,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:15:26,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-20 23:15:26,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:15:26,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:15:27,004 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:15:27,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:15:28,053 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:15:28,054 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:15:28,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1909027670] [2021-11-20 23:15:28,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1909027670] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:15:28,054 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:15:28,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 17 [2021-11-20 23:15:28,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9164654] [2021-11-20 23:15:28,054 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:15:28,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 23:15:28,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:15:28,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 23:15:28,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-11-20 23:15:28,056 INFO L87 Difference]: Start difference. First operand 102 states and 114 transitions. Second operand has 18 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 23:15:30,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:15:30,329 INFO L93 Difference]: Finished difference Result 191 states and 209 transitions. [2021-11-20 23:15:30,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 23:15:30,331 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 30 [2021-11-20 23:15:30,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:15:30,333 INFO L225 Difference]: With dead ends: 191 [2021-11-20 23:15:30,333 INFO L226 Difference]: Without dead ends: 191 [2021-11-20 23:15:30,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-11-20 23:15:30,335 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 496 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 648 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-20 23:15:30,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [496 Valid, 648 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-20 23:15:30,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-11-20 23:15:30,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 102. [2021-11-20 23:15:30,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 74 states have (on average 1.4054054054054055) internal successors, (104), 94 states have internal predecessors, (104), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 23:15:30,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 112 transitions. [2021-11-20 23:15:30,356 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 112 transitions. Word has length 30 [2021-11-20 23:15:30,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:15:30,357 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 112 transitions. [2021-11-20 23:15:30,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 23:15:30,357 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 112 transitions. [2021-11-20 23:15:30,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-20 23:15:30,360 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:15:30,361 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:15:30,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-20 23:15:30,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:15:30,569 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-20 23:15:30,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:15:30,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1587333178, now seen corresponding path program 1 times [2021-11-20 23:15:30,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:15:30,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1219672306] [2021-11-20 23:15:30,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:15:30,570 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:15:30,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:15:30,572 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:15:30,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-20 23:15:30,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:15:30,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 23:15:30,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:15:30,831 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 23:15:30,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:15:30,946 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 23:15:30,947 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:15:30,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1219672306] [2021-11-20 23:15:30,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1219672306] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:15:30,947 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:15:30,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 23:15:30,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477028901] [2021-11-20 23:15:30,947 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:15:30,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:15:30,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:15:30,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:15:30,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:15:30,949 INFO L87 Difference]: Start difference. First operand 102 states and 112 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 23:15:31,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:15:31,052 INFO L93 Difference]: Finished difference Result 133 states and 146 transitions. [2021-11-20 23:15:31,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:15:31,053 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2021-11-20 23:15:31,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:15:31,055 INFO L225 Difference]: With dead ends: 133 [2021-11-20 23:15:31,055 INFO L226 Difference]: Without dead ends: 133 [2021-11-20 23:15:31,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-20 23:15:31,056 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 197 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:15:31,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 188 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:15:31,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-11-20 23:15:31,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 123. [2021-11-20 23:15:31,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 95 states have (on average 1.4421052631578948) internal successors, (137), 115 states have internal predecessors, (137), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 23:15:31,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 145 transitions. [2021-11-20 23:15:31,065 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 145 transitions. Word has length 32 [2021-11-20 23:15:31,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:15:31,065 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 145 transitions. [2021-11-20 23:15:31,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 23:15:31,066 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 145 transitions. [2021-11-20 23:15:31,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-20 23:15:31,067 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:15:31,068 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:15:31,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-20 23:15:31,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:15:31,275 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-20 23:15:31,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:15:31,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1922829059, now seen corresponding path program 1 times [2021-11-20 23:15:31,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:15:31,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1041181370] [2021-11-20 23:15:31,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:15:31,276 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:15:31,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:15:31,278 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:15:31,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-20 23:15:31,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:15:31,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 23:15:31,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:15:31,470 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 23:15:31,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:15:31,574 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 23:15:31,574 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:15:31,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1041181370] [2021-11-20 23:15:31,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1041181370] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:15:31,574 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:15:31,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 23:15:31,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938145191] [2021-11-20 23:15:31,575 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:15:31,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:15:31,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:15:31,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:15:31,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:15:31,576 INFO L87 Difference]: Start difference. First operand 123 states and 145 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 23:15:31,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:15:31,672 INFO L93 Difference]: Finished difference Result 124 states and 135 transitions. [2021-11-20 23:15:31,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 23:15:31,681 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 33 [2021-11-20 23:15:31,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:15:31,683 INFO L225 Difference]: With dead ends: 124 [2021-11-20 23:15:31,683 INFO L226 Difference]: Without dead ends: 124 [2021-11-20 23:15:31,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:15:31,685 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 88 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:15:31,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 317 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:15:31,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-11-20 23:15:31,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 118. [2021-11-20 23:15:31,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 90 states have (on average 1.4) internal successors, (126), 110 states have internal predecessors, (126), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 23:15:31,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 134 transitions. [2021-11-20 23:15:31,692 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 134 transitions. Word has length 33 [2021-11-20 23:15:31,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:15:31,693 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 134 transitions. [2021-11-20 23:15:31,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 23:15:31,693 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 134 transitions. [2021-11-20 23:15:31,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-20 23:15:31,695 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:15:31,695 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:15:31,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-20 23:15:31,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:15:31,909 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-20 23:15:31,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:15:31,910 INFO L85 PathProgramCache]: Analyzing trace with hash -46108703, now seen corresponding path program 1 times [2021-11-20 23:15:31,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:15:31,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1447062899] [2021-11-20 23:15:31,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:15:31,911 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:15:31,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:15:31,912 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:15:31,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-20 23:15:32,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:15:32,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-20 23:15:32,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:15:32,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:15:32,470 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 23:15:32,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2021-11-20 23:15:32,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 23:15:32,835 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 23:15:32,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 29 [2021-11-20 23:15:33,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:33,383 INFO L354 Elim1Store]: treesize reduction 47, result has 13.0 percent of original size [2021-11-20 23:15:33,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 33 [2021-11-20 23:15:33,621 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 23:15:33,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 22 [2021-11-20 23:15:33,776 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:15:33,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:15:34,499 INFO L354 Elim1Store]: treesize reduction 5, result has 75.0 percent of original size [2021-11-20 23:15:34,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2021-11-20 23:15:36,510 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_sll_circular_create_~last~0#1.offset| (_ BitVec 32))) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base|) |ULTIMATE.start_sll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) |c_ULTIMATE.start_sll_circular_create_~last~0#1.base|)) is different from false [2021-11-20 23:15:38,532 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_sll_circular_create_~last~0#1.offset| (_ BitVec 32))) (= |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base|) |ULTIMATE.start_sll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.base|)) |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.offset|))) is different from false [2021-11-20 23:15:39,132 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2021-11-20 23:15:39,132 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:15:39,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1447062899] [2021-11-20 23:15:39,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1447062899] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:15:39,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [654211025] [2021-11-20 23:15:39,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:15:39,133 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-20 23:15:39,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-20 23:15:39,135 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-20 23:15:39,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-20 23:15:39,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:15:39,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-20 23:15:39,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:15:39,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:15:39,739 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-20 23:15:39,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 33 [2021-11-20 23:15:39,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 23:15:40,299 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 23:15:40,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 35 [2021-11-20 23:15:40,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:41,023 INFO L354 Elim1Store]: treesize reduction 47, result has 13.0 percent of original size [2021-11-20 23:15:41,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 40 [2021-11-20 23:15:41,340 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 23:15:41,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 43 [2021-11-20 23:15:41,708 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:15:41,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:15:46,215 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_sll_circular_create_~last~0#1.offset| (_ BitVec 32))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base|) |ULTIMATE.start_sll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|)))))) (_ bv1 1)))) is different from false [2021-11-20 23:15:48,234 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_sll_circular_create_~last~0#1.offset| (_ BitVec 32))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base|) |ULTIMATE.start_sll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.base|)) |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.offset|))))))))) (_ bv1 1)))) is different from false [2021-11-20 23:16:41,236 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2021-11-20 23:16:41,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [654211025] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:16:41,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433590136] [2021-11-20 23:16:41,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:41,237 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:16:41,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:16:41,253 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:16:41,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-20 23:16:41,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:41,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-20 23:16:41,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:16:42,043 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 23:16:42,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-11-20 23:16:42,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 23:16:42,669 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 23:16:42,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 29 [2021-11-20 23:16:43,593 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-11-20 23:16:43,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 33 [2021-11-20 23:16:43,860 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 23:16:43,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 24 [2021-11-20 23:16:43,924 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:16:43,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:16:44,364 INFO L354 Elim1Store]: treesize reduction 5, result has 75.0 percent of original size [2021-11-20 23:16:44,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 31 [2021-11-20 23:16:44,861 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2021-11-20 23:16:44,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433590136] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:16:44,861 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-20 23:16:44,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14, 19, 19, 19, 14] total 65 [2021-11-20 23:16:44,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295933902] [2021-11-20 23:16:44,862 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-20 23:16:44,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-11-20 23:16:44,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:16:44,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-11-20 23:16:44,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=3515, Unknown=18, NotChecked=492, Total=4290 [2021-11-20 23:16:44,867 INFO L87 Difference]: Start difference. First operand 118 states and 134 transitions. Second operand has 66 states, 65 states have (on average 1.9692307692307693) internal successors, (128), 57 states have internal predecessors, (128), 4 states have call successors, (4), 4 states have call predecessors, (4), 8 states have return successors, (8), 8 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-20 23:16:58,367 WARN L227 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 50 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 23:16:58,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:16:58,754 INFO L93 Difference]: Finished difference Result 159 states and 187 transitions. [2021-11-20 23:16:58,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-20 23:16:58,755 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 65 states have (on average 1.9692307692307693) internal successors, (128), 57 states have internal predecessors, (128), 4 states have call successors, (4), 4 states have call predecessors, (4), 8 states have return successors, (8), 8 states have call predecessors, (8), 4 states have call successors, (8) Word has length 38 [2021-11-20 23:16:58,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:16:58,758 INFO L225 Difference]: With dead ends: 159 [2021-11-20 23:16:58,758 INFO L226 Difference]: Without dead ends: 159 [2021-11-20 23:16:58,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 146 SyntacticMatches, 14 SemanticMatches, 71 ConstructedPredicates, 4 IntricatePredicates, 1 DeprecatedPredicates, 1703 ImplicationChecksByTransitivity, 81.7s TimeCoverageRelationStatistics Valid=349, Invalid=4340, Unknown=19, NotChecked=548, Total=5256 [2021-11-20 23:16:58,761 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 55 mSDsluCounter, 1347 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 1409 SdHoareTripleChecker+Invalid, 766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 514 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 23:16:58,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 1409 Invalid, 766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 239 Invalid, 0 Unknown, 514 Unchecked, 0.7s Time] [2021-11-20 23:16:58,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-11-20 23:16:58,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 135. [2021-11-20 23:16:58,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 107 states have (on average 1.3738317757009346) internal successors, (147), 127 states have internal predecessors, (147), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 23:16:58,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 155 transitions. [2021-11-20 23:16:58,770 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 155 transitions. Word has length 38 [2021-11-20 23:16:58,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:16:58,771 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 155 transitions. [2021-11-20 23:16:58,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 65 states have (on average 1.9692307692307693) internal successors, (128), 57 states have internal predecessors, (128), 4 states have call successors, (4), 4 states have call predecessors, (4), 8 states have return successors, (8), 8 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-20 23:16:58,771 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 155 transitions. [2021-11-20 23:16:58,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-20 23:16:58,773 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:16:58,773 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:16:58,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-20 23:16:58,991 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-20 23:16:59,183 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2021-11-20 23:16:59,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-20 23:16:59,381 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-20 23:16:59,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:16:59,382 INFO L85 PathProgramCache]: Analyzing trace with hash -46108702, now seen corresponding path program 1 times [2021-11-20 23:16:59,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:16:59,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1781853373] [2021-11-20 23:16:59,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:59,383 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:16:59,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:16:59,384 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:16:59,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-20 23:16:59,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:59,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-20 23:16:59,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:16:59,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:16:59,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:17:00,146 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 23:17:00,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-20 23:17:00,183 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 23:17:00,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-11-20 23:17:00,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 23:17:00,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 23:17:00,768 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 23:17:00,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 45 [2021-11-20 23:17:00,804 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-20 23:17:00,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 50 [2021-11-20 23:17:01,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:17:01,603 INFO L354 Elim1Store]: treesize reduction 47, result has 13.0 percent of original size [2021-11-20 23:17:01,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 85 treesize of output 63 [2021-11-20 23:17:01,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:17:01,633 INFO L354 Elim1Store]: treesize reduction 63, result has 14.9 percent of original size [2021-11-20 23:17:01,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 66 treesize of output 53 [2021-11-20 23:17:02,044 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 23:17:02,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 45 [2021-11-20 23:17:02,053 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 23:17:02,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 24 [2021-11-20 23:17:02,324 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:17:02,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:17:06,848 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start_sll_circular_create_~last~0#1.offset| (_ BitVec 32))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base|) |ULTIMATE.start_sll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|)) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base|) |ULTIMATE.start_sll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|)))) (forall ((|ULTIMATE.start_sll_circular_create_~last~0#1.offset| (_ BitVec 32))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base|) |ULTIMATE.start_sll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|)) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|))) (bvule (bvadd (_ bv4 32) .cse0) (bvadd (_ bv8 32) .cse0))))) is different from false [2021-11-20 23:18:28,267 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_2| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~head~0#1.base_BEFORE_CALL_8| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_121| (_ BitVec 32))) (or (let ((.cse0 (bvadd (_ bv8 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_2|))) (and (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_2|) .cse0) (bvule .cse0 (select (store |c_#length| |v_node_create_~temp~0#1.base_121| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~head~0#1.base_BEFORE_CALL_8|)))) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| |v_node_create_~temp~0#1.base_121|))))) (exists ((|v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_59| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_59|))) (let ((.cse1 (bvadd (_ bv8 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_2|))) (or (not (bvule .cse1 (select (store |c_old(#length)| |v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_59| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~head~0#1.base_BEFORE_CALL_8|))) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_2|) .cse1)))))))) is different from false [2021-11-20 23:18:43,013 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 6 refuted. 4 times theorem prover too weak. 1 trivial. 1 not checked. [2021-11-20 23:18:43,014 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:18:43,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1781853373] [2021-11-20 23:18:43,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1781853373] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:18:43,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [392900532] [2021-11-20 23:18:43,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:18:43,015 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-20 23:18:43,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-20 23:18:43,017 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-20 23:18:43,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-20 23:18:43,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:18:43,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-20 23:18:43,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:18:43,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:18:43,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:18:43,598 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 23:18:43,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-11-20 23:18:43,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-20 23:18:43,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 23:18:43,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 23:18:43,841 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 23:18:43,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 45 [2021-11-20 23:18:43,867 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-20 23:18:43,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 50 [2021-11-20 23:18:44,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:18:44,154 INFO L354 Elim1Store]: treesize reduction 47, result has 13.0 percent of original size [2021-11-20 23:18:44,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 85 treesize of output 63 [2021-11-20 23:18:44,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:18:44,193 INFO L354 Elim1Store]: treesize reduction 63, result has 14.9 percent of original size [2021-11-20 23:18:44,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 66 treesize of output 53 [2021-11-20 23:18:44,426 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 23:18:44,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 45 [2021-11-20 23:18:44,433 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 23:18:44,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 24 [2021-11-20 23:18:44,577 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:18:44,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:18:48,807 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_63| (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_63|))) (let ((.cse0 (bvadd (_ bv8 32) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|))) (and (bvule .cse0 (select (store |c_#length| |v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_63| (_ bv8 32)) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|)) (bvule (bvadd (_ bv4 32) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) .cse0))))) is different from false [2021-11-20 23:18:51,686 WARN L860 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_circular_create_~head~0#1.base_BEFORE_CALL_10| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_4| (_ BitVec 32))) (or (exists ((|v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_63| (_ BitVec 32))) (and (let ((.cse0 (bvadd (_ bv8 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_4|))) (or (not (bvule .cse0 (select (store |c_old(#length)| |v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_63| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~head~0#1.base_BEFORE_CALL_10|))) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_4|) .cse0)))) (= (_ bv0 1) (select |c_old(#valid)| |v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_63|)))) (let ((.cse1 (bvadd (_ bv8 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_4|)) (.cse2 (bvadd |c_node_create_#res#1.offset| (_ bv8 32)))) (and (bvule .cse1 (select |c_#length| |v_ULTIMATE.start_sll_circular_create_~head~0#1.base_BEFORE_CALL_10|)) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_4|) .cse1) (bvule (bvadd (_ bv4 32) |c_node_create_#res#1.offset|) .cse2) (bvule .cse2 (select |c_#length| |c_node_create_#res#1.base|)))))) is different from true [2021-11-20 23:20:01,848 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 4 refuted. 4 times theorem prover too weak. 1 trivial. 3 not checked. [2021-11-20 23:20:01,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [392900532] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:20:01,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012507387] [2021-11-20 23:20:01,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:20:01,849 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:20:01,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:20:01,850 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:20:01,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-20 23:20:01,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:20:01,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-20 23:20:01,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:20:01,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:20:07,175 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 23:20:07,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-11-20 23:20:07,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-20 23:20:11,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 23:20:11,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 23:20:14,549 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 23:20:14,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 45 [2021-11-20 23:20:14,578 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-20 23:20:14,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 50 [2021-11-20 23:20:28,305 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-11-20 23:20:28,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 63 [2021-11-20 23:20:28,354 INFO L354 Elim1Store]: treesize reduction 88, result has 17.8 percent of original size [2021-11-20 23:20:28,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 53 [2021-11-20 23:20:30,903 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 23:20:30,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 45 [2021-11-20 23:20:30,911 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 23:20:30,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 24 [2021-11-20 23:20:31,056 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:20:31,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:20:32,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:20:32,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:22:09,450 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_22| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_6| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~head~0#1.base_BEFORE_CALL_12| (_ BitVec 32))) (or (let ((.cse0 (bvadd (_ bv8 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_6|))) (and (bvule .cse0 (select |c_#length| |v_ULTIMATE.start_sll_circular_create_~head~0#1.base_BEFORE_CALL_12|)) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_6|) .cse0) (not (= |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_22| |c_node_create_~temp~0#1.base|)))) (exists ((|v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_67| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_67|))))))) (let ((.cse1 (bvadd (_ bv8 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_6|))) (or (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_6|) .cse1)) (not (bvule .cse1 (select (store |c_old(#length)| |v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_67| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~head~0#1.base_BEFORE_CALL_12|))) (= |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_22| |v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_67|))))))) is different from false [2021-11-20 23:22:15,033 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_node_create_~temp~0#1.base_137| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_22| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_6| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~head~0#1.base_BEFORE_CALL_12| (_ BitVec 32))) (or (let ((.cse0 (bvadd (_ bv8 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_6|))) (and (bvule .cse0 (select (store |c_#length| |v_node_create_~temp~0#1.base_137| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~head~0#1.base_BEFORE_CALL_12|)) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_6|) .cse0) (not (= |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_22| |v_node_create_~temp~0#1.base_137|)))) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| |v_node_create_~temp~0#1.base_137|))))) (exists ((|v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_67| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_67|))))))) (let ((.cse1 (bvadd (_ bv8 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_6|))) (or (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_6|) .cse1)) (not (bvule .cse1 (select (store |c_old(#length)| |v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_67| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~head~0#1.base_BEFORE_CALL_12|))) (= |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_22| |v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_67|))))))) is different from false [2021-11-20 23:22:44,039 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-20 23:22:44,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 40 [2021-11-20 23:22:52,966 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 5 not checked. [2021-11-20 23:22:52,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012507387] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:22:52,967 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-20 23:22:52,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19, 19, 20, 20] total 63 [2021-11-20 23:22:52,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106756778] [2021-11-20 23:22:52,967 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-20 23:22:52,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-11-20 23:22:52,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:22:52,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-11-20 23:22:52,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=2992, Unknown=129, NotChecked=702, Total=4032 [2021-11-20 23:22:52,972 INFO L87 Difference]: Start difference. First operand 135 states and 155 transitions. Second operand has 64 states, 63 states have (on average 1.8095238095238095) internal successors, (114), 53 states have internal predecessors, (114), 5 states have call successors, (5), 5 states have call predecessors, (5), 8 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-20 23:22:55,813 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_2| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~head~0#1.base_BEFORE_CALL_8| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_121| (_ BitVec 32))) (or (let ((.cse0 (bvadd (_ bv8 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_2|))) (and (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_2|) .cse0) (bvule .cse0 (select (store |c_#length| |v_node_create_~temp~0#1.base_121| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~head~0#1.base_BEFORE_CALL_8|)))) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| |v_node_create_~temp~0#1.base_121|))))) (exists ((|v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_59| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_59|))) (let ((.cse1 (bvadd (_ bv8 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_2|))) (or (not (bvule .cse1 (select (store |c_old(#length)| |v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_59| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~head~0#1.base_BEFORE_CALL_8|))) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_2|) .cse1)))))))) (= |c_old(#valid)| |c_#valid|) (= |c_#length| |c_old(#length)|) (forall ((|v_node_create_~temp~0#1.base_137| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_22| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_6| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~head~0#1.base_BEFORE_CALL_12| (_ BitVec 32))) (or (let ((.cse2 (bvadd (_ bv8 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_6|))) (and (bvule .cse2 (select (store |c_#length| |v_node_create_~temp~0#1.base_137| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~head~0#1.base_BEFORE_CALL_12|)) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_6|) .cse2) (not (= |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_22| |v_node_create_~temp~0#1.base_137|)))) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| |v_node_create_~temp~0#1.base_137|))))) (exists ((|v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_67| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_67|))))))) (let ((.cse3 (bvadd (_ bv8 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_6|))) (or (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_6|) .cse3)) (not (bvule .cse3 (select (store |c_old(#length)| |v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_67| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~head~0#1.base_BEFORE_CALL_12|))) (= |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_22| |v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_67|)))))))) is different from false [2021-11-20 23:22:57,829 WARN L838 $PredicateComparison]: unable to prove that (and (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (select |c_#valid| |c_node_create_~temp~0#1.base|)))) (= |c_node_create_~temp~0#1.offset| (_ bv0 32)) (= (store |c_old(#length)| |c_node_create_~temp~0#1.base| (_ bv8 32)) |c_#length|) (= (_ bv8 32) (select |c_#length| |c_node_create_~temp~0#1.base|)) (= (_ bv0 1) (bvneg (select |c_old(#valid)| |c_node_create_~temp~0#1.base|))) (forall ((|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_22| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_6| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~head~0#1.base_BEFORE_CALL_12| (_ BitVec 32))) (or (let ((.cse0 (bvadd (_ bv8 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_6|))) (and (bvule .cse0 (select |c_#length| |v_ULTIMATE.start_sll_circular_create_~head~0#1.base_BEFORE_CALL_12|)) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_6|) .cse0) (not (= |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_22| |c_node_create_~temp~0#1.base|)))) (exists ((|v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_67| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_67|))))))) (let ((.cse1 (bvadd (_ bv8 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_6|))) (or (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_6|) .cse1)) (not (bvule .cse1 (select (store |c_old(#length)| |v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_67| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~head~0#1.base_BEFORE_CALL_12|))) (= |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_22| |v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_67|)))))))) is different from false [2021-11-20 23:23:30,005 WARN L838 $PredicateComparison]: unable to prove that (and (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (select |c_#valid| |c_node_create_~temp~0#1.base|)))) (= |c_node_create_~temp~0#1.offset| (_ bv0 32)) (forall ((|v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_2| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~head~0#1.base_BEFORE_CALL_8| (_ BitVec 32))) (or (let ((.cse0 (bvadd |c_node_create_~temp~0#1.offset| (_ bv8 32))) (.cse1 (bvadd (_ bv8 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_2|))) (and (bvule .cse0 (select |c_#length| |c_node_create_~temp~0#1.base|)) (bvule (bvadd (_ bv4 32) |c_node_create_~temp~0#1.offset|) .cse0) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_2|) .cse1) (bvule .cse1 (select |c_#length| |v_ULTIMATE.start_sll_circular_create_~head~0#1.base_BEFORE_CALL_8|)))) (exists ((|v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_59| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_59|))) (let ((.cse2 (bvadd (_ bv8 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_2|))) (or (not (bvule .cse2 (select (store |c_old(#length)| |v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_59| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~head~0#1.base_BEFORE_CALL_8|))) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_2|) .cse2)))))))) (= (_ bv8 32) (select |c_#length| |c_node_create_~temp~0#1.base|))) is different from false [2021-11-20 23:23:32,025 WARN L838 $PredicateComparison]: unable to prove that (and (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| |c_node_create_#res#1.base|)) (_ bv1 1))) (= |c_node_create_#res#1.offset| (_ bv0 32)) (forall ((|v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_2| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~head~0#1.base_BEFORE_CALL_8| (_ BitVec 32))) (or (let ((.cse0 (bvadd (_ bv8 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_2|)) (.cse1 (bvadd |c_node_create_#res#1.offset| (_ bv8 32)))) (and (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_2|) .cse0) (bvule (bvadd (_ bv4 32) |c_node_create_#res#1.offset|) .cse1) (bvule .cse0 (select |c_#length| |v_ULTIMATE.start_sll_circular_create_~head~0#1.base_BEFORE_CALL_8|)) (bvule .cse1 (select |c_#length| |c_node_create_#res#1.base|)))) (exists ((|v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_59| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_59|))) (let ((.cse2 (bvadd (_ bv8 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_2|))) (or (not (bvule .cse2 (select (store |c_old(#length)| |v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_59| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~head~0#1.base_BEFORE_CALL_8|))) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_2|) .cse2)))))))) (= (_ bv8 32) (select |c_#length| |c_node_create_#res#1.base|))) is different from false [2021-11-20 23:24:00,363 WARN L227 SmtUtils]: Spent 16.37s on a formula simplification that was a NOOP. DAG size: 43 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 23:24:04,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:24:04,944 INFO L93 Difference]: Finished difference Result 166 states and 191 transitions. [2021-11-20 23:24:04,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-20 23:24:04,945 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 63 states have (on average 1.8095238095238095) internal successors, (114), 53 states have internal predecessors, (114), 5 states have call successors, (5), 5 states have call predecessors, (5), 8 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) Word has length 38 [2021-11-20 23:24:04,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:24:04,946 INFO L225 Difference]: With dead ends: 166 [2021-11-20 23:24:04,946 INFO L226 Difference]: Without dead ends: 166 [2021-11-20 23:24:04,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 155 SyntacticMatches, 11 SemanticMatches, 73 ConstructedPredicates, 10 IntricatePredicates, 0 DeprecatedPredicates, 1259 ImplicationChecksByTransitivity, 399.7s TimeCoverageRelationStatistics Valid=285, Invalid=3769, Unknown=146, NotChecked=1350, Total=5550 [2021-11-20 23:24:04,949 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 37 mSDsluCounter, 1649 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1714 SdHoareTripleChecker+Invalid, 1212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 913 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-20 23:24:04,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 1714 Invalid, 1212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 294 Invalid, 0 Unknown, 913 Unchecked, 1.7s Time] [2021-11-20 23:24:04,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-11-20 23:24:04,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 141. [2021-11-20 23:24:04,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 112 states have (on average 1.3482142857142858) internal successors, (151), 132 states have internal predecessors, (151), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 23:24:04,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 159 transitions. [2021-11-20 23:24:04,956 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 159 transitions. Word has length 38 [2021-11-20 23:24:04,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:24:04,957 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 159 transitions. [2021-11-20 23:24:04,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 63 states have (on average 1.8095238095238095) internal successors, (114), 53 states have internal predecessors, (114), 5 states have call successors, (5), 5 states have call predecessors, (5), 8 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-20 23:24:04,957 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 159 transitions. [2021-11-20 23:24:04,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-20 23:24:04,958 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:24:04,958 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:24:04,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-20 23:24:05,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-11-20 23:24:05,395 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-11-20 23:24:05,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:24:05,574 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-20 23:24:05,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:24:05,574 INFO L85 PathProgramCache]: Analyzing trace with hash -46108647, now seen corresponding path program 1 times [2021-11-20 23:24:05,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:24:05,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1833249906] [2021-11-20 23:24:05,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:24:05,575 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:24:05,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:24:05,576 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:24:05,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-20 23:24:05,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:24:05,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 23:24:05,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:24:05,809 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 23:24:05,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:24:05,993 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 23:24:05,993 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:24:05,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1833249906] [2021-11-20 23:24:05,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1833249906] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:24:05,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1083234993] [2021-11-20 23:24:05,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:24:05,994 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-20 23:24:05,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-20 23:24:05,995 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-20 23:24:05,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-20 23:24:06,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:24:06,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 23:24:06,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:24:06,246 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 23:24:06,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:24:06,371 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 23:24:06,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1083234993] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:24:06,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511430894] [2021-11-20 23:24:06,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:24:06,371 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:24:06,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:24:06,372 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:24:06,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-20 23:24:06,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:24:06,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 23:24:06,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:24:06,533 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 23:24:06,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:24:06,638 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 23:24:06,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511430894] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:24:06,639 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-20 23:24:06,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 10 [2021-11-20 23:24:06,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935011385] [2021-11-20 23:24:06,639 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-20 23:24:06,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 23:24:06,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:24:06,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 23:24:06,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-20 23:24:06,641 INFO L87 Difference]: Start difference. First operand 141 states and 159 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 23:24:06,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:24:06,905 INFO L93 Difference]: Finished difference Result 240 states and 257 transitions. [2021-11-20 23:24:06,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 23:24:06,906 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 38 [2021-11-20 23:24:06,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:24:06,908 INFO L225 Difference]: With dead ends: 240 [2021-11-20 23:24:06,908 INFO L226 Difference]: Without dead ends: 240 [2021-11-20 23:24:06,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-11-20 23:24:06,910 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 402 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:24:06,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 549 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:24:06,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-11-20 23:24:06,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 141. [2021-11-20 23:24:06,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 112 states have (on average 1.3214285714285714) internal successors, (148), 132 states have internal predecessors, (148), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 23:24:06,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 156 transitions. [2021-11-20 23:24:06,917 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 156 transitions. Word has length 38 [2021-11-20 23:24:06,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:24:06,917 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 156 transitions. [2021-11-20 23:24:06,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 23:24:06,918 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 156 transitions. [2021-11-20 23:24:06,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-20 23:24:06,919 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:24:06,919 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:24:06,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-20 23:24:07,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-20 23:24:07,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-20 23:24:07,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-20 23:24:07,520 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-20 23:24:07,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:24:07,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1344923978, now seen corresponding path program 1 times [2021-11-20 23:24:07,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:24:07,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2043358676] [2021-11-20 23:24:07,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:24:07,521 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:24:07,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:24:07,522 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:24:07,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-20 23:24:07,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:24:07,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 23:24:07,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:24:07,761 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-20 23:24:07,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:24:07,872 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-20 23:24:07,872 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:24:07,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2043358676] [2021-11-20 23:24:07,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2043358676] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:24:07,872 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:24:07,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 23:24:07,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629691650] [2021-11-20 23:24:07,873 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:24:07,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:24:07,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:24:07,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:24:07,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:24:07,874 INFO L87 Difference]: Start difference. First operand 141 states and 156 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 23:24:07,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:24:07,957 INFO L93 Difference]: Finished difference Result 143 states and 152 transitions. [2021-11-20 23:24:07,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:24:07,958 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 45 [2021-11-20 23:24:07,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:24:07,960 INFO L225 Difference]: With dead ends: 143 [2021-11-20 23:24:07,960 INFO L226 Difference]: Without dead ends: 143 [2021-11-20 23:24:07,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-20 23:24:07,961 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 74 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:24:07,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 258 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:24:07,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-11-20 23:24:07,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 139. [2021-11-20 23:24:07,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 110 states have (on average 1.3) internal successors, (143), 130 states have internal predecessors, (143), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 23:24:07,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 151 transitions. [2021-11-20 23:24:07,968 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 151 transitions. Word has length 45 [2021-11-20 23:24:07,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:24:07,969 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 151 transitions. [2021-11-20 23:24:07,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 23:24:07,969 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 151 transitions. [2021-11-20 23:24:07,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-20 23:24:07,970 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:24:07,971 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:24:07,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-20 23:24:08,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:24:08,186 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-20 23:24:08,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:24:08,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1344923923, now seen corresponding path program 1 times [2021-11-20 23:24:08,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:24:08,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1438959816] [2021-11-20 23:24:08,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:24:08,187 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:24:08,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:24:08,188 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:24:08,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-20 23:24:08,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:24:08,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 23:24:08,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:24:08,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:24:08,658 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 23:24:08,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:24:08,954 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 23:24:08,954 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:24:08,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1438959816] [2021-11-20 23:24:08,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1438959816] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:24:08,954 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:24:08,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 9 [2021-11-20 23:24:08,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553428444] [2021-11-20 23:24:08,955 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:24:08,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 23:24:08,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:24:08,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 23:24:08,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-20 23:24:08,956 INFO L87 Difference]: Start difference. First operand 139 states and 151 transitions. Second operand has 10 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 23:24:09,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:24:09,897 INFO L93 Difference]: Finished difference Result 164 states and 176 transitions. [2021-11-20 23:24:09,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 23:24:09,898 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 45 [2021-11-20 23:24:09,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:24:09,900 INFO L225 Difference]: With dead ends: 164 [2021-11-20 23:24:09,900 INFO L226 Difference]: Without dead ends: 164 [2021-11-20 23:24:09,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 75 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-11-20 23:24:09,901 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 289 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 23:24:09,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 290 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-20 23:24:09,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-11-20 23:24:09,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 142. [2021-11-20 23:24:09,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 113 states have (on average 1.3097345132743363) internal successors, (148), 133 states have internal predecessors, (148), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 23:24:09,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 156 transitions. [2021-11-20 23:24:09,908 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 156 transitions. Word has length 45 [2021-11-20 23:24:09,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:24:09,908 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 156 transitions. [2021-11-20 23:24:09,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 23:24:09,909 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 156 transitions. [2021-11-20 23:24:09,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-20 23:24:09,909 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:24:09,910 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:24:09,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-20 23:24:10,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:24:10,121 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-20 23:24:10,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:24:10,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1344923924, now seen corresponding path program 1 times [2021-11-20 23:24:10,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:24:10,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2097191502] [2021-11-20 23:24:10,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:24:10,122 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:24:10,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:24:10,123 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:24:10,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-20 23:24:10,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:24:10,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-20 23:24:10,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:24:10,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:24:10,719 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 23:24:10,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:24:12,148 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 23:24:12,148 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:24:12,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2097191502] [2021-11-20 23:24:12,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2097191502] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:24:12,149 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:24:12,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 17 [2021-11-20 23:24:12,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141711326] [2021-11-20 23:24:12,149 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:24:12,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 23:24:12,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:24:12,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 23:24:12,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-11-20 23:24:12,151 INFO L87 Difference]: Start difference. First operand 142 states and 156 transitions. Second operand has 18 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 states have internal predecessors, (62), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 23:24:14,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:24:14,086 INFO L93 Difference]: Finished difference Result 176 states and 189 transitions. [2021-11-20 23:24:14,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 23:24:14,087 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 states have internal predecessors, (62), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2021-11-20 23:24:14,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:24:14,088 INFO L225 Difference]: With dead ends: 176 [2021-11-20 23:24:14,089 INFO L226 Difference]: Without dead ends: 176 [2021-11-20 23:24:14,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-11-20 23:24:14,090 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 701 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 701 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-20 23:24:14,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [701 Valid, 340 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-20 23:24:14,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-11-20 23:24:14,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 142. [2021-11-20 23:24:14,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 113 states have (on average 1.2831858407079646) internal successors, (145), 133 states have internal predecessors, (145), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 23:24:14,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 153 transitions. [2021-11-20 23:24:14,105 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 153 transitions. Word has length 45 [2021-11-20 23:24:14,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:24:14,105 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 153 transitions. [2021-11-20 23:24:14,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 states have internal predecessors, (62), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 23:24:14,106 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 153 transitions. [2021-11-20 23:24:14,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-20 23:24:14,106 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:24:14,106 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:24:14,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-20 23:24:14,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:24:14,307 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-20 23:24:14,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:24:14,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1217170439, now seen corresponding path program 2 times [2021-11-20 23:24:14,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:24:14,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1911337350] [2021-11-20 23:24:14,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 23:24:14,308 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:24:14,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:24:14,309 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:24:14,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-20 23:24:14,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 23:24:14,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:24:14,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 23:24:14,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:24:14,721 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 23:24:14,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:24:14,991 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 23:24:14,991 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:24:14,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1911337350] [2021-11-20 23:24:14,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1911337350] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:24:14,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1030769423] [2021-11-20 23:24:14,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 23:24:14,992 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-20 23:24:14,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-20 23:24:14,997 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-20 23:24:15,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-20 23:24:15,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 23:24:15,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:24:15,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 23:24:15,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:24:15,494 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 23:24:15,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:24:15,667 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 23:24:15,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1030769423] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:24:15,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800370041] [2021-11-20 23:24:15,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 23:24:15,668 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:24:15,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:24:15,669 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:24:15,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-20 23:24:15,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 23:24:15,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:24:15,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 23:24:15,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:24:16,253 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 23:24:16,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:24:16,935 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 23:24:16,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800370041] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:24:16,936 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-20 23:24:16,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 7, 9] total 17 [2021-11-20 23:24:16,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584208938] [2021-11-20 23:24:16,936 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-20 23:24:16,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-20 23:24:16,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:24:16,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-20 23:24:16,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-11-20 23:24:16,937 INFO L87 Difference]: Start difference. First operand 142 states and 153 transitions. Second operand has 17 states, 17 states have (on average 4.588235294117647) internal successors, (78), 17 states have internal predecessors, (78), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 23:24:17,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:24:17,130 INFO L93 Difference]: Finished difference Result 137 states and 143 transitions. [2021-11-20 23:24:17,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 23:24:17,131 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.588235294117647) internal successors, (78), 17 states have internal predecessors, (78), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 46 [2021-11-20 23:24:17,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:24:17,132 INFO L225 Difference]: With dead ends: 137 [2021-11-20 23:24:17,132 INFO L226 Difference]: Without dead ends: 137 [2021-11-20 23:24:17,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2021-11-20 23:24:17,133 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 335 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:24:17,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 336 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:24:17,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-11-20 23:24:17,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 135. [2021-11-20 23:24:17,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 108 states have (on average 1.2407407407407407) internal successors, (134), 126 states have internal predecessors, (134), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 23:24:17,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 142 transitions. [2021-11-20 23:24:17,138 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 142 transitions. Word has length 46 [2021-11-20 23:24:17,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:24:17,143 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 142 transitions. [2021-11-20 23:24:17,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.588235294117647) internal successors, (78), 17 states have internal predecessors, (78), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 23:24:17,144 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 142 transitions. [2021-11-20 23:24:17,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-20 23:24:17,145 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:24:17,145 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:24:17,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-20 23:24:17,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2021-11-20 23:24:17,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-20 23:24:17,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:24:17,755 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-20 23:24:17,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:24:17,756 INFO L85 PathProgramCache]: Analyzing trace with hash -585852510, now seen corresponding path program 2 times [2021-11-20 23:24:17,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:24:17,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2011003246] [2021-11-20 23:24:17,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 23:24:17,756 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:24:17,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:24:17,757 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:24:17,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-20 23:24:17,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 23:24:17,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:24:17,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 23:24:17,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:24:18,012 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 40 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-20 23:24:18,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:24:18,163 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-20 23:24:18,164 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:24:18,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2011003246] [2021-11-20 23:24:18,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2011003246] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:24:18,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [627399334] [2021-11-20 23:24:18,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 23:24:18,164 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-20 23:24:18,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-20 23:24:18,165 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-20 23:24:18,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-20 23:24:18,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 23:24:18,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:24:18,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 23:24:18,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:24:18,460 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 40 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-20 23:24:18,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:24:18,593 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-20 23:24:18,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [627399334] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:24:18,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584616689] [2021-11-20 23:24:18,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 23:24:18,594 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:24:18,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:24:18,594 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:24:18,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-20 23:24:18,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 23:24:18,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:24:18,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 23:24:18,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:24:18,885 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 40 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-20 23:24:18,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:24:19,019 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-20 23:24:19,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584616689] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:24:19,020 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-20 23:24:19,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 6 [2021-11-20 23:24:19,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521755160] [2021-11-20 23:24:19,020 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-20 23:24:19,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:24:19,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:24:19,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:24:19,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:24:19,022 INFO L87 Difference]: Start difference. First operand 135 states and 142 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-20 23:24:19,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:24:19,049 INFO L93 Difference]: Finished difference Result 94 states and 98 transitions. [2021-11-20 23:24:19,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:24:19,050 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 49 [2021-11-20 23:24:19,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:24:19,051 INFO L225 Difference]: With dead ends: 94 [2021-11-20 23:24:19,051 INFO L226 Difference]: Without dead ends: 94 [2021-11-20 23:24:19,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:24:19,052 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 58 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:24:19,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 171 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:24:19,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-20 23:24:19,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-11-20 23:24:19,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 74 states have (on average 1.2702702702702702) internal successors, (94), 89 states have internal predecessors, (94), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 23:24:19,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 98 transitions. [2021-11-20 23:24:19,057 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 98 transitions. Word has length 49 [2021-11-20 23:24:19,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:24:19,057 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 98 transitions. [2021-11-20 23:24:19,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-20 23:24:19,058 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 98 transitions. [2021-11-20 23:24:19,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-20 23:24:19,058 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:24:19,059 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:24:19,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-20 23:24:19,274 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2021-11-20 23:24:19,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2021-11-20 23:24:19,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-20 23:24:19,666 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-20 23:24:19,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:24:19,666 INFO L85 PathProgramCache]: Analyzing trace with hash -399124699, now seen corresponding path program 1 times [2021-11-20 23:24:19,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:24:19,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1633208026] [2021-11-20 23:24:19,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:24:19,667 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:24:19,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:24:19,668 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:24:19,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-20 23:24:19,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:24:19,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-20 23:24:19,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:24:19,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:24:20,225 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 23:24:20,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-11-20 23:24:20,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 23:24:20,514 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 23:24:20,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 22 [2021-11-20 23:24:20,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:24:21,015 INFO L354 Elim1Store]: treesize reduction 47, result has 13.0 percent of original size [2021-11-20 23:24:21,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 25 [2021-11-20 23:24:21,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 23:24:21,413 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 23:24:21,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 14 [2021-11-20 23:24:21,694 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-20 23:24:21,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-11-20 23:24:22,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-20 23:24:22,459 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:24:22,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:26:07,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 126 [2021-11-20 23:26:10,749 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_10 (_ BitVec 32)) (|ULTIMATE.start_sll_circular_create_~last~0#1.offset| (_ BitVec 32))) (not (= (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base|) |ULTIMATE.start_sll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) v_DerPreprocessor_10) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|))) is different from false [2021-11-20 23:26:12,772 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_10 (_ BitVec 32)) (|ULTIMATE.start_sll_circular_create_~last~0#1.offset| (_ BitVec 32))) (not (= (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base|) |ULTIMATE.start_sll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.base|)) |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.offset|) v_DerPreprocessor_10) |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.offset|) |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.base|))) is different from false [2021-11-20 23:26:12,841 INFO L354 Elim1Store]: treesize reduction 15, result has 64.3 percent of original size [2021-11-20 23:26:12,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 40 [2021-11-20 23:26:12,859 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:26:12,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2021-11-20 23:26:12,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-11-20 23:26:12,950 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:26:12,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 53 [2021-11-20 23:26:14,144 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2021-11-20 23:26:14,145 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:26:14,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1633208026] [2021-11-20 23:26:14,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1633208026] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:26:14,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [843469523] [2021-11-20 23:26:14,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:26:14,145 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-20 23:26:14,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-20 23:26:14,147 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-20 23:26:14,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2021-11-20 23:26:14,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:26:14,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-20 23:26:14,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:26:14,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:26:14,943 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 23:26:14,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-11-20 23:26:15,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 23:26:15,655 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 23:26:15,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 22 [2021-11-20 23:26:16,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 23:26:16,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:26:16,567 INFO L354 Elim1Store]: treesize reduction 47, result has 13.0 percent of original size [2021-11-20 23:26:16,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 25 [2021-11-20 23:26:17,176 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 23:26:17,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 14 [2021-11-20 23:26:17,678 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-20 23:26:17,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-11-20 23:26:18,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-11-20 23:26:18,866 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:26:18,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:26:33,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 126 [2021-11-20 23:26:33,905 INFO L354 Elim1Store]: treesize reduction 15, result has 64.3 percent of original size [2021-11-20 23:26:33,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 40 [2021-11-20 23:26:33,924 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:26:33,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2021-11-20 23:26:33,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-11-20 23:26:34,025 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:26:34,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 53 [2021-11-20 23:26:34,926 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2021-11-20 23:26:34,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [843469523] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:26:34,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456438107] [2021-11-20 23:26:34,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:26:34,927 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:26:34,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:26:34,928 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:26:34,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-20 23:26:35,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:26:35,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-20 23:26:35,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:26:35,752 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 23:26:35,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2021-11-20 23:26:35,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 23:26:35,886 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 23:26:35,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 22 [2021-11-20 23:26:36,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:26:36,076 INFO L354 Elim1Store]: treesize reduction 47, result has 13.0 percent of original size [2021-11-20 23:26:36,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 25 [2021-11-20 23:26:36,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 23:26:36,248 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 23:26:36,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 14 [2021-11-20 23:26:36,338 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-20 23:26:36,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-11-20 23:26:36,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-11-20 23:26:36,620 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:26:36,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:26:54,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 126 [2021-11-20 23:26:54,508 INFO L354 Elim1Store]: treesize reduction 15, result has 64.3 percent of original size [2021-11-20 23:26:54,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 40 [2021-11-20 23:26:54,527 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:26:54,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2021-11-20 23:26:54,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-11-20 23:26:54,652 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:26:54,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 53 [2021-11-20 23:26:55,682 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2021-11-20 23:26:55,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456438107] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:26:55,682 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-20 23:26:55,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 28, 27, 29, 28] total 72 [2021-11-20 23:26:55,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820567289] [2021-11-20 23:26:55,683 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-20 23:26:55,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-11-20 23:26:55,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:26:55,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-11-20 23:26:55,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=4535, Unknown=42, NotChecked=274, Total=5112 [2021-11-20 23:26:55,687 INFO L87 Difference]: Start difference. First operand 94 states and 98 transitions. Second operand has 72 states, 70 states have (on average 1.6714285714285715) internal successors, (117), 63 states have internal predecessors, (117), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-11-20 23:26:59,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:26:59,550 INFO L93 Difference]: Finished difference Result 94 states and 97 transitions. [2021-11-20 23:26:59,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-20 23:26:59,551 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 70 states have (on average 1.6714285714285715) internal successors, (117), 63 states have internal predecessors, (117), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 49 [2021-11-20 23:26:59,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:26:59,552 INFO L225 Difference]: With dead ends: 94 [2021-11-20 23:26:59,552 INFO L226 Difference]: Without dead ends: 94 [2021-11-20 23:26:59,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 203 SyntacticMatches, 17 SemanticMatches, 83 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2053 ImplicationChecksByTransitivity, 151.6s TimeCoverageRelationStatistics Valid=422, Invalid=6350, Unknown=42, NotChecked=326, Total=7140 [2021-11-20 23:26:59,555 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 131 mSDsluCounter, 1706 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 1757 SdHoareTripleChecker+Invalid, 1378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 521 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-20 23:26:59,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 1757 Invalid, 1378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 828 Invalid, 0 Unknown, 521 Unchecked, 1.9s Time] [2021-11-20 23:26:59,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-20 23:26:59,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-11-20 23:26:59,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 74 states have (on average 1.2567567567567568) internal successors, (93), 89 states have internal predecessors, (93), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 23:26:59,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 97 transitions. [2021-11-20 23:26:59,559 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 97 transitions. Word has length 49 [2021-11-20 23:26:59,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:26:59,559 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 97 transitions. [2021-11-20 23:26:59,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 70 states have (on average 1.6714285714285715) internal successors, (117), 63 states have internal predecessors, (117), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-11-20 23:26:59,559 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 97 transitions. [2021-11-20 23:26:59,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-20 23:26:59,560 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:26:59,560 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:26:59,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-20 23:26:59,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-20 23:26:59,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2021-11-20 23:27:00,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-20 23:27:00,170 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-20 23:27:00,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:27:00,170 INFO L85 PathProgramCache]: Analyzing trace with hash 780049028, now seen corresponding path program 1 times [2021-11-20 23:27:00,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:27:00,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1358926254] [2021-11-20 23:27:00,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:27:00,171 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:27:00,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:27:00,172 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:27:00,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-20 23:27:00,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:27:00,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 23:27:00,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:27:00,447 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-20 23:27:00,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:27:00,633 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-20 23:27:00,634 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:27:00,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1358926254] [2021-11-20 23:27:00,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1358926254] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:27:00,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1505537119] [2021-11-20 23:27:00,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:27:00,636 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-20 23:27:00,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-20 23:27:00,637 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-20 23:27:00,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2021-11-20 23:27:00,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:27:00,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 23:27:00,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:27:00,919 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-20 23:27:00,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:27:01,026 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-20 23:27:01,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1505537119] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:27:01,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978630059] [2021-11-20 23:27:01,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:27:01,026 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:27:01,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:27:01,027 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:27:01,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-20 23:27:01,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:27:01,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 23:27:01,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:27:01,259 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-20 23:27:01,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:27:01,372 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-20 23:27:01,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978630059] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:27:01,372 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-20 23:27:01,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 10 [2021-11-20 23:27:01,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482628442] [2021-11-20 23:27:01,373 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-20 23:27:01,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 23:27:01,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:27:01,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 23:27:01,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-20 23:27:01,374 INFO L87 Difference]: Start difference. First operand 94 states and 97 transitions. Second operand has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 23:27:01,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:27:01,534 INFO L93 Difference]: Finished difference Result 90 states and 91 transitions. [2021-11-20 23:27:01,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 23:27:01,535 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 55 [2021-11-20 23:27:01,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:27:01,535 INFO L225 Difference]: With dead ends: 90 [2021-11-20 23:27:01,536 INFO L226 Difference]: Without dead ends: 90 [2021-11-20 23:27:01,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 316 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-11-20 23:27:01,536 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 74 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:27:01,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 418 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:27:01,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-20 23:27:01,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-11-20 23:27:01,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 72 states have (on average 1.2083333333333333) internal successors, (87), 85 states have internal predecessors, (87), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 23:27:01,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2021-11-20 23:27:01,540 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 55 [2021-11-20 23:27:01,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:27:01,541 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2021-11-20 23:27:01,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 23:27:01,541 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2021-11-20 23:27:01,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-20 23:27:01,542 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:27:01,542 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:27:01,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-11-20 23:27:01,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-20 23:27:01,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2021-11-20 23:27:02,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-20 23:27:02,151 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-20 23:27:02,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:27:02,152 INFO L85 PathProgramCache]: Analyzing trace with hash 780048973, now seen corresponding path program 1 times [2021-11-20 23:27:02,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:27:02,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [459306102] [2021-11-20 23:27:02,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:27:02,154 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:27:02,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:27:02,155 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:27:02,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06b428b7-e18a-45eb-bb0e-9892949c36dd/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-11-20 23:27:02,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:27:02,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 67 conjunts are in the unsatisfiable core [2021-11-20 23:27:02,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:27:02,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:27:02,787 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 23:27:02,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-11-20 23:27:02,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 23:27:03,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 23:27:03,274 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 23:27:03,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 47 [2021-11-20 23:27:03,298 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-20 23:27:03,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 52 [2021-11-20 23:27:03,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:27:03,991 INFO L354 Elim1Store]: treesize reduction 47, result has 13.0 percent of original size [2021-11-20 23:27:03,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 88 treesize of output 66 [2021-11-20 23:27:04,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:27:04,022 INFO L354 Elim1Store]: treesize reduction 63, result has 14.9 percent of original size [2021-11-20 23:27:04,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 56 [2021-11-20 23:27:04,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-20 23:27:04,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2021-11-20 23:27:05,123 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-11-20 23:27:05,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 59 treesize of output 48 [2021-11-20 23:27:05,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-11-20 23:27:05,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-11-20 23:27:05,626 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:27:05,626 INFO L328 TraceCheckSpWp]: Computing backward predicates...