./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext3-properties/dll_circular_traversal-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext3-properties/dll_circular_traversal-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4fb6aa6206205a747f158782e93b3c9333c1a2cdc4e8dab70046fca960e31961 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 23:04:07,463 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 23:04:07,465 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 23:04:07,523 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 23:04:07,524 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 23:04:07,528 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 23:04:07,531 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 23:04:07,535 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 23:04:07,538 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 23:04:07,544 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 23:04:07,546 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 23:04:07,548 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 23:04:07,548 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 23:04:07,551 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 23:04:07,553 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 23:04:07,558 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 23:04:07,560 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 23:04:07,561 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 23:04:07,564 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 23:04:07,572 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 23:04:07,574 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 23:04:07,576 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 23:04:07,579 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 23:04:07,580 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 23:04:07,590 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 23:04:07,591 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 23:04:07,591 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 23:04:07,594 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 23:04:07,594 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 23:04:07,596 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 23:04:07,596 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 23:04:07,598 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 23:04:07,600 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 23:04:07,601 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 23:04:07,603 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 23:04:07,603 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 23:04:07,604 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 23:04:07,605 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 23:04:07,605 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 23:04:07,606 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 23:04:07,607 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 23:04:07,608 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-02 23:04:07,657 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 23:04:07,658 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 23:04:07,658 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 23:04:07,659 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 23:04:07,660 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 23:04:07,661 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 23:04:07,661 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 23:04:07,661 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 23:04:07,662 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 23:04:07,662 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-02 23:04:07,663 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 23:04:07,663 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 23:04:07,663 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 23:04:07,664 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-02 23:04:07,664 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-02 23:04:07,664 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-02 23:04:07,664 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 23:04:07,665 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-02 23:04:07,665 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 23:04:07,665 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 23:04:07,665 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 23:04:07,666 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 23:04:07,666 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 23:04:07,666 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 23:04:07,666 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 23:04:07,667 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 23:04:07,667 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 23:04:07,667 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 23:04:07,667 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 23:04:07,668 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4fb6aa6206205a747f158782e93b3c9333c1a2cdc4e8dab70046fca960e31961 [2021-11-02 23:04:07,982 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 23:04:08,015 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 23:04:08,019 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 23:04:08,021 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 23:04:08,022 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 23:04:08,023 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/list-ext3-properties/dll_circular_traversal-2.i [2021-11-02 23:04:08,101 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/data/5411a70df/2fce5b0583294838957b2cc56172c4c0/FLAGb3f66a09e [2021-11-02 23:04:08,756 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 23:04:08,756 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/sv-benchmarks/c/list-ext3-properties/dll_circular_traversal-2.i [2021-11-02 23:04:08,782 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/data/5411a70df/2fce5b0583294838957b2cc56172c4c0/FLAGb3f66a09e [2021-11-02 23:04:08,984 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/data/5411a70df/2fce5b0583294838957b2cc56172c4c0 [2021-11-02 23:04:08,988 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 23:04:08,990 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-02 23:04:08,992 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 23:04:08,992 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 23:04:08,996 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 23:04:08,997 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:04:08" (1/1) ... [2021-11-02 23:04:08,997 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@144ea903 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:04:08, skipping insertion in model container [2021-11-02 23:04:08,998 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:04:08" (1/1) ... [2021-11-02 23:04:09,005 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 23:04:09,071 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 23:04:09,382 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/sv-benchmarks/c/list-ext3-properties/dll_circular_traversal-2.i[24211,24224] [2021-11-02 23:04:09,385 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 23:04:09,402 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 23:04:09,492 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/sv-benchmarks/c/list-ext3-properties/dll_circular_traversal-2.i[24211,24224] [2021-11-02 23:04:09,493 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 23:04:09,524 INFO L208 MainTranslator]: Completed translation [2021-11-02 23:04:09,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:04:09 WrapperNode [2021-11-02 23:04:09,525 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 23:04:09,526 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 23:04:09,526 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 23:04:09,526 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 23:04:09,541 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:04:09" (1/1) ... [2021-11-02 23:04:09,542 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:04:09" (1/1) ... [2021-11-02 23:04:09,584 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:04:09" (1/1) ... [2021-11-02 23:04:09,585 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:04:09" (1/1) ... [2021-11-02 23:04:09,618 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:04:09" (1/1) ... [2021-11-02 23:04:09,624 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:04:09" (1/1) ... [2021-11-02 23:04:09,628 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:04:09" (1/1) ... [2021-11-02 23:04:09,636 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 23:04:09,637 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 23:04:09,637 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 23:04:09,637 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 23:04:09,638 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:04:09" (1/1) ... [2021-11-02 23:04:09,656 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 23:04:09,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:04:09,681 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 23:04:09,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 23:04:09,719 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-02 23:04:09,719 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 23:04:09,720 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-11-02 23:04:09,720 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-11-02 23:04:09,720 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-11-02 23:04:09,720 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-11-02 23:04:09,720 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_circular_create [2021-11-02 23:04:09,721 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-02 23:04:09,721 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-02 23:04:09,721 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-11-02 23:04:09,721 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-11-02 23:04:09,721 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-11-02 23:04:09,722 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-11-02 23:04:09,722 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 23:04:09,722 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-11-02 23:04:09,722 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-11-02 23:04:09,722 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-02 23:04:09,723 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-02 23:04:09,723 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-02 23:04:09,723 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-02 23:04:09,723 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-02 23:04:09,723 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-02 23:04:09,724 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-02 23:04:09,724 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-02 23:04:09,724 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-02 23:04:09,724 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-02 23:04:09,724 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-02 23:04:09,725 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-02 23:04:09,725 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-02 23:04:09,725 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-02 23:04:09,725 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-02 23:04:09,725 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-02 23:04:09,726 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-02 23:04:09,726 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-02 23:04:09,726 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-02 23:04:09,726 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-02 23:04:09,726 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-02 23:04:09,726 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-02 23:04:09,727 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-02 23:04:09,727 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-02 23:04:09,727 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-02 23:04:09,727 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-02 23:04:09,727 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-02 23:04:09,728 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-02 23:04:09,728 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-02 23:04:09,728 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-02 23:04:09,728 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-02 23:04:09,728 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-02 23:04:09,729 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-02 23:04:09,729 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-02 23:04:09,729 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-02 23:04:09,729 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-02 23:04:09,729 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-02 23:04:09,729 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-02 23:04:09,730 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-02 23:04:09,730 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-02 23:04:09,730 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-02 23:04:09,730 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-02 23:04:09,730 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-02 23:04:09,731 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-02 23:04:09,731 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-02 23:04:09,731 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-02 23:04:09,731 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-02 23:04:09,731 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-02 23:04:09,732 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-02 23:04:09,732 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-02 23:04:09,732 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-02 23:04:09,732 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-02 23:04:09,732 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-02 23:04:09,733 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-02 23:04:09,733 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-11-02 23:04:09,733 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-02 23:04:09,733 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-02 23:04:09,733 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-02 23:04:09,733 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-02 23:04:09,734 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-02 23:04:09,734 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-02 23:04:09,734 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-02 23:04:09,734 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-02 23:04:09,734 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-02 23:04:09,735 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-02 23:04:09,735 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-02 23:04:09,735 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-02 23:04:09,735 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-02 23:04:09,735 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-02 23:04:09,735 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-02 23:04:09,736 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-02 23:04:09,736 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-02 23:04:09,736 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-02 23:04:09,736 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-02 23:04:09,736 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-02 23:04:09,737 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-02 23:04:09,737 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-02 23:04:09,737 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-02 23:04:09,737 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-02 23:04:09,737 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-02 23:04:09,737 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-02 23:04:09,738 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-02 23:04:09,738 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-02 23:04:09,738 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-02 23:04:09,738 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-02 23:04:09,738 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-02 23:04:09,738 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-02 23:04:09,739 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-02 23:04:09,739 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-02 23:04:09,739 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-02 23:04:09,739 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-02 23:04:09,739 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-02 23:04:09,739 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-02 23:04:09,740 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-02 23:04:09,740 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-02 23:04:09,740 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-02 23:04:09,740 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-02 23:04:09,740 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-02 23:04:09,740 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-02 23:04:09,741 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-02 23:04:09,741 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-02 23:04:09,741 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-02 23:04:09,741 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-11-02 23:04:09,741 INFO L130 BoogieDeclarations]: Found specification of procedure dll_circular_create [2021-11-02 23:04:09,741 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-02 23:04:09,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-02 23:04:09,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-02 23:04:09,742 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-02 23:04:09,742 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-02 23:04:09,742 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-02 23:04:09,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-02 23:04:09,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-02 23:04:09,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 23:04:09,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 23:04:10,288 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-11-02 23:04:10,441 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 23:04:10,441 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-02 23:04:10,443 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:04:10 BoogieIcfgContainer [2021-11-02 23:04:10,444 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 23:04:10,446 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 23:04:10,446 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 23:04:10,450 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 23:04:10,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 11:04:08" (1/3) ... [2021-11-02 23:04:10,451 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e5aa18e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:04:10, skipping insertion in model container [2021-11-02 23:04:10,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:04:09" (2/3) ... [2021-11-02 23:04:10,451 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e5aa18e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:04:10, skipping insertion in model container [2021-11-02 23:04:10,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:04:10" (3/3) ... [2021-11-02 23:04:10,453 INFO L111 eAbstractionObserver]: Analyzing ICFG dll_circular_traversal-2.i [2021-11-02 23:04:10,459 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 23:04:10,459 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 35 error locations. [2021-11-02 23:04:10,569 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 23:04:10,576 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 [2021-11-02 23:04:10,578 INFO L340 AbstractCegarLoop]: Starting to check reachability of 35 error locations. [2021-11-02 23:04:10,601 INFO L276 IsEmpty]: Start isEmpty. Operand has 89 states, 45 states have (on average 2.0) internal successors, (90), 81 states have internal predecessors, (90), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-02 23:04:10,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-02 23:04:10,611 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:04:10,612 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:04:10,612 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting dll_circular_createErr0REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 32 more)] === [2021-11-02 23:04:10,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:04:10,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1386773690, now seen corresponding path program 1 times [2021-11-02 23:04:10,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:04:10,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376876740] [2021-11-02 23:04:10,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:04:10,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:04:10,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:10,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 23:04:10,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:10,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:04:10,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:04:10,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376876740] [2021-11-02 23:04:10,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376876740] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:04:10,948 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:04:10,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:04:10,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145500042] [2021-11-02 23:04:10,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:04:10,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:04:10,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:04:10,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:04:10,982 INFO L87 Difference]: Start difference. First operand has 89 states, 45 states have (on average 2.0) internal successors, (90), 81 states have internal predecessors, (90), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 23:04:11,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:04:11,241 INFO L93 Difference]: Finished difference Result 85 states and 90 transitions. [2021-11-02 23:04:11,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:04:11,242 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-11-02 23:04:11,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:04:11,250 INFO L225 Difference]: With dead ends: 85 [2021-11-02 23:04:11,250 INFO L226 Difference]: Without dead ends: 78 [2021-11-02 23:04:11,253 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:04:11,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-02 23:04:11,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-11-02 23:04:11,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 72 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-02 23:04:11,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 81 transitions. [2021-11-02 23:04:11,297 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 81 transitions. Word has length 10 [2021-11-02 23:04:11,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:04:11,298 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 81 transitions. [2021-11-02 23:04:11,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 23:04:11,298 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 81 transitions. [2021-11-02 23:04:11,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-02 23:04:11,299 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:04:11,299 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:04:11,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 23:04:11,300 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting dll_circular_createErr1REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 32 more)] === [2021-11-02 23:04:11,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:04:11,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1386773691, now seen corresponding path program 1 times [2021-11-02 23:04:11,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:04:11,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188111178] [2021-11-02 23:04:11,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:04:11,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:04:11,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:11,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 23:04:11,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:11,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:04:11,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:04:11,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188111178] [2021-11-02 23:04:11,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188111178] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:04:11,452 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:04:11,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:04:11,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961514969] [2021-11-02 23:04:11,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:04:11,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:04:11,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:04:11,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:04:11,455 INFO L87 Difference]: Start difference. First operand 78 states and 81 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 23:04:11,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:04:11,608 INFO L93 Difference]: Finished difference Result 74 states and 77 transitions. [2021-11-02 23:04:11,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:04:11,608 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-11-02 23:04:11,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:04:11,610 INFO L225 Difference]: With dead ends: 74 [2021-11-02 23:04:11,610 INFO L226 Difference]: Without dead ends: 74 [2021-11-02 23:04:11,611 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:04:11,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-02 23:04:11,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-11-02 23:04:11,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 42 states have (on average 1.7142857142857142) internal successors, (72), 68 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-02 23:04:11,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2021-11-02 23:04:11,619 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 10 [2021-11-02 23:04:11,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:04:11,620 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2021-11-02 23:04:11,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 23:04:11,620 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2021-11-02 23:04:11,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-02 23:04:11,621 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:04:11,621 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:04:11,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 23:04:11,622 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting dll_circular_createErr6REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 32 more)] === [2021-11-02 23:04:11,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:04:11,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1817780120, now seen corresponding path program 1 times [2021-11-02 23:04:11,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:04:11,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041606165] [2021-11-02 23:04:11,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:04:11,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:04:11,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:11,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 23:04:11,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:11,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:04:11,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:04:11,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041606165] [2021-11-02 23:04:11,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041606165] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:04:11,718 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:04:11,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:04:11,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826923482] [2021-11-02 23:04:11,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:04:11,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:04:11,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:04:11,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:04:11,721 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 23:04:11,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:04:11,888 INFO L93 Difference]: Finished difference Result 80 states and 84 transitions. [2021-11-02 23:04:11,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:04:11,889 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-11-02 23:04:11,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:04:11,892 INFO L225 Difference]: With dead ends: 80 [2021-11-02 23:04:11,892 INFO L226 Difference]: Without dead ends: 80 [2021-11-02 23:04:11,893 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:04:11,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-02 23:04:11,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 72. [2021-11-02 23:04:11,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 42 states have (on average 1.6666666666666667) internal successors, (70), 66 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-02 23:04:11,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2021-11-02 23:04:11,901 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 16 [2021-11-02 23:04:11,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:04:11,901 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2021-11-02 23:04:11,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 23:04:11,902 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2021-11-02 23:04:11,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-02 23:04:11,902 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:04:11,902 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:04:11,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-02 23:04:11,903 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting dll_circular_createErr7REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 32 more)] === [2021-11-02 23:04:11,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:04:11,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1817780119, now seen corresponding path program 1 times [2021-11-02 23:04:11,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:04:11,904 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324414979] [2021-11-02 23:04:11,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:04:11,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:04:11,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:11,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 23:04:11,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:12,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:04:12,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:04:12,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324414979] [2021-11-02 23:04:12,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324414979] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:04:12,008 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:04:12,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:04:12,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466722627] [2021-11-02 23:04:12,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:04:12,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:04:12,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:04:12,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:04:12,011 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 23:04:12,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:04:12,190 INFO L93 Difference]: Finished difference Result 78 states and 82 transitions. [2021-11-02 23:04:12,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:04:12,191 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-11-02 23:04:12,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:04:12,195 INFO L225 Difference]: With dead ends: 78 [2021-11-02 23:04:12,195 INFO L226 Difference]: Without dead ends: 78 [2021-11-02 23:04:12,196 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:04:12,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-02 23:04:12,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 70. [2021-11-02 23:04:12,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 42 states have (on average 1.619047619047619) internal successors, (68), 64 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-02 23:04:12,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 73 transitions. [2021-11-02 23:04:12,218 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 73 transitions. Word has length 16 [2021-11-02 23:04:12,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:04:12,219 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 73 transitions. [2021-11-02 23:04:12,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 23:04:12,219 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 73 transitions. [2021-11-02 23:04:12,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-02 23:04:12,220 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:04:12,221 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:04:12,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-02 23:04:12,221 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting dll_circular_createErr14REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 32 more)] === [2021-11-02 23:04:12,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:04:12,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1817781561, now seen corresponding path program 1 times [2021-11-02 23:04:12,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:04:12,223 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647710351] [2021-11-02 23:04:12,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:04:12,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:04:12,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:12,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 23:04:12,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:12,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:04:12,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:04:12,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647710351] [2021-11-02 23:04:12,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647710351] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:04:12,377 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:04:12,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 23:04:12,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975366881] [2021-11-02 23:04:12,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 23:04:12,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:04:12,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 23:04:12,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-02 23:04:12,381 INFO L87 Difference]: Start difference. First operand 70 states and 73 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 23:04:12,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:04:12,584 INFO L93 Difference]: Finished difference Result 79 states and 83 transitions. [2021-11-02 23:04:12,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 23:04:12,585 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-11-02 23:04:12,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:04:12,586 INFO L225 Difference]: With dead ends: 79 [2021-11-02 23:04:12,586 INFO L226 Difference]: Without dead ends: 79 [2021-11-02 23:04:12,587 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-02 23:04:12,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-02 23:04:12,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2021-11-02 23:04:12,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 49 states have (on average 1.5918367346938775) internal successors, (78), 71 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-02 23:04:12,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 83 transitions. [2021-11-02 23:04:12,598 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 83 transitions. Word has length 16 [2021-11-02 23:04:12,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:04:12,598 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 83 transitions. [2021-11-02 23:04:12,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 23:04:12,599 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 83 transitions. [2021-11-02 23:04:12,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-02 23:04:12,600 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:04:12,600 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:04:12,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-02 23:04:12,600 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting dll_circular_createErr15REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 32 more)] === [2021-11-02 23:04:12,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:04:12,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1817781560, now seen corresponding path program 1 times [2021-11-02 23:04:12,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:04:12,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400479536] [2021-11-02 23:04:12,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:04:12,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:04:12,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:12,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 23:04:12,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:12,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:04:12,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:04:12,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400479536] [2021-11-02 23:04:12,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400479536] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:04:12,723 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:04:12,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 23:04:12,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289107455] [2021-11-02 23:04:12,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 23:04:12,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:04:12,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 23:04:12,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-02 23:04:12,725 INFO L87 Difference]: Start difference. First operand 77 states and 83 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 23:04:12,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:04:12,894 INFO L93 Difference]: Finished difference Result 77 states and 80 transitions. [2021-11-02 23:04:12,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 23:04:12,906 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-11-02 23:04:12,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:04:12,907 INFO L225 Difference]: With dead ends: 77 [2021-11-02 23:04:12,907 INFO L226 Difference]: Without dead ends: 77 [2021-11-02 23:04:12,908 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-02 23:04:12,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-02 23:04:12,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2021-11-02 23:04:12,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 47 states have (on average 1.574468085106383) internal successors, (74), 69 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-02 23:04:12,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2021-11-02 23:04:12,912 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 16 [2021-11-02 23:04:12,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:04:12,912 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2021-11-02 23:04:12,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 23:04:12,912 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2021-11-02 23:04:12,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-02 23:04:12,913 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:04:12,913 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:04:12,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-02 23:04:12,914 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting dll_circular_createErr11REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 32 more)] === [2021-11-02 23:04:12,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:04:12,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1164994604, now seen corresponding path program 1 times [2021-11-02 23:04:12,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:04:12,914 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363375758] [2021-11-02 23:04:12,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:04:12,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:04:12,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:13,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 23:04:13,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:13,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:04:13,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:04:13,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363375758] [2021-11-02 23:04:13,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363375758] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:04:13,078 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:04:13,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 23:04:13,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632548712] [2021-11-02 23:04:13,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 23:04:13,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:04:13,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 23:04:13,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-02 23:04:13,081 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 23:04:13,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:04:13,219 INFO L93 Difference]: Finished difference Result 76 states and 79 transitions. [2021-11-02 23:04:13,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 23:04:13,225 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-11-02 23:04:13,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:04:13,226 INFO L225 Difference]: With dead ends: 76 [2021-11-02 23:04:13,226 INFO L226 Difference]: Without dead ends: 76 [2021-11-02 23:04:13,227 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-02 23:04:13,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-02 23:04:13,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2021-11-02 23:04:13,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 47 states have (on average 1.553191489361702) internal successors, (73), 69 states have internal predecessors, (73), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-02 23:04:13,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2021-11-02 23:04:13,245 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 18 [2021-11-02 23:04:13,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:04:13,246 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2021-11-02 23:04:13,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 23:04:13,246 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2021-11-02 23:04:13,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-02 23:04:13,247 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:04:13,247 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:04:13,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-02 23:04:13,248 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting dll_circular_createErr14REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 32 more)] === [2021-11-02 23:04:13,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:04:13,249 INFO L85 PathProgramCache]: Analyzing trace with hash -916227877, now seen corresponding path program 1 times [2021-11-02 23:04:13,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:04:13,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819102540] [2021-11-02 23:04:13,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:04:13,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:04:13,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:13,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 23:04:13,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:13,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:04:13,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:04:13,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819102540] [2021-11-02 23:04:13,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819102540] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:04:13,348 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:04:13,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 23:04:13,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463129328] [2021-11-02 23:04:13,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 23:04:13,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:04:13,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 23:04:13,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:04:13,350 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 23:04:13,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:04:13,508 INFO L93 Difference]: Finished difference Result 73 states and 76 transitions. [2021-11-02 23:04:13,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 23:04:13,509 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-11-02 23:04:13,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:04:13,510 INFO L225 Difference]: With dead ends: 73 [2021-11-02 23:04:13,510 INFO L226 Difference]: Without dead ends: 73 [2021-11-02 23:04:13,510 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-02 23:04:13,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-02 23:04:13,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-11-02 23:04:13,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 47 states have (on average 1.5106382978723405) internal successors, (71), 67 states have internal predecessors, (71), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-02 23:04:13,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2021-11-02 23:04:13,514 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 22 [2021-11-02 23:04:13,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:04:13,514 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2021-11-02 23:04:13,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 23:04:13,515 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2021-11-02 23:04:13,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-02 23:04:13,515 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:04:13,516 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:04:13,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-02 23:04:13,516 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting dll_circular_createErr15REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 32 more)] === [2021-11-02 23:04:13,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:04:13,516 INFO L85 PathProgramCache]: Analyzing trace with hash -916227876, now seen corresponding path program 1 times [2021-11-02 23:04:13,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:04:13,517 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467800026] [2021-11-02 23:04:13,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:04:13,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:04:13,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:13,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 23:04:13,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:13,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:04:13,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:04:13,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467800026] [2021-11-02 23:04:13,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467800026] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:04:13,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299798268] [2021-11-02 23:04:13,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:04:13,607 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:04:13,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:04:13,609 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:04:13,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 23:04:13,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:13,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-02 23:04:13,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:04:13,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:04:13,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299798268] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:04:13,954 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:04:13,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-11-02 23:04:13,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922908760] [2021-11-02 23:04:13,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 23:04:13,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:04:13,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 23:04:13,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-02 23:04:13,956 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 23:04:14,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:04:14,133 INFO L93 Difference]: Finished difference Result 81 states and 84 transitions. [2021-11-02 23:04:14,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 23:04:14,133 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-11-02 23:04:14,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:04:14,136 INFO L225 Difference]: With dead ends: 81 [2021-11-02 23:04:14,136 INFO L226 Difference]: Without dead ends: 81 [2021-11-02 23:04:14,137 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-02 23:04:14,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-02 23:04:14,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 75. [2021-11-02 23:04:14,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 49 states have (on average 1.489795918367347) internal successors, (73), 69 states have internal predecessors, (73), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-02 23:04:14,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2021-11-02 23:04:14,142 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 22 [2021-11-02 23:04:14,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:04:14,142 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2021-11-02 23:04:14,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 23:04:14,143 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2021-11-02 23:04:14,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-02 23:04:14,144 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:04:14,144 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:04:14,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 23:04:14,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:04:14,377 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting dll_circular_createErr11REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 32 more)] === [2021-11-02 23:04:14,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:04:14,377 INFO L85 PathProgramCache]: Analyzing trace with hash -25308864, now seen corresponding path program 1 times [2021-11-02 23:04:14,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:04:14,378 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393022942] [2021-11-02 23:04:14,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:04:14,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:04:14,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:14,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 23:04:14,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:14,495 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:04:14,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:04:14,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393022942] [2021-11-02 23:04:14,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393022942] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:04:14,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054059678] [2021-11-02 23:04:14,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:04:14,496 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:04:14,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:04:14,497 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:04:14,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-02 23:04:14,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:14,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-02 23:04:14,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:04:14,742 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 [2021-11-02 23:04:14,749 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 [2021-11-02 23:04:14,866 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-02 23:04:14,867 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 22 treesize of output 24 [2021-11-02 23:04:14,875 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 23:04:14,876 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 21 treesize of output 21 [2021-11-02 23:04:15,009 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:04:15,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054059678] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:04:15,010 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:04:15,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 7 [2021-11-02 23:04:15,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358130068] [2021-11-02 23:04:15,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 23:04:15,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:04:15,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 23:04:15,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-02 23:04:15,011 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 23:04:15,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:04:15,243 INFO L93 Difference]: Finished difference Result 73 states and 76 transitions. [2021-11-02 23:04:15,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 23:04:15,244 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-11-02 23:04:15,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:04:15,245 INFO L225 Difference]: With dead ends: 73 [2021-11-02 23:04:15,245 INFO L226 Difference]: Without dead ends: 73 [2021-11-02 23:04:15,245 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-02 23:04:15,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-02 23:04:15,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-11-02 23:04:15,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 49 states have (on average 1.4489795918367347) internal successors, (71), 67 states have internal predecessors, (71), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-02 23:04:15,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2021-11-02 23:04:15,248 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 24 [2021-11-02 23:04:15,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:04:15,249 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2021-11-02 23:04:15,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 23:04:15,249 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2021-11-02 23:04:15,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-02 23:04:15,252 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:04:15,253 INFO L513 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] [2021-11-02 23:04:15,290 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-02 23:04:15,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:04:15,471 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 32 more)] === [2021-11-02 23:04:15,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:04:15,472 INFO L85 PathProgramCache]: Analyzing trace with hash 875108529, now seen corresponding path program 1 times [2021-11-02 23:04:15,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:04:15,472 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926346497] [2021-11-02 23:04:15,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:04:15,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:04:15,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:15,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 23:04:15,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:15,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 23:04:15,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:15,622 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-02 23:04:15,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:04:15,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926346497] [2021-11-02 23:04:15,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926346497] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:04:15,623 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:04:15,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 23:04:15,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693386604] [2021-11-02 23:04:15,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 23:04:15,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:04:15,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 23:04:15,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-02 23:04:15,628 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 5 states have internal predecessors, (22), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-02 23:04:15,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:04:15,880 INFO L93 Difference]: Finished difference Result 71 states and 74 transitions. [2021-11-02 23:04:15,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 23:04:15,881 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 5 states have internal predecessors, (22), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 33 [2021-11-02 23:04:15,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:04:15,882 INFO L225 Difference]: With dead ends: 71 [2021-11-02 23:04:15,882 INFO L226 Difference]: Without dead ends: 71 [2021-11-02 23:04:15,882 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-02 23:04:15,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-02 23:04:15,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2021-11-02 23:04:15,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 50 states have (on average 1.38) internal successors, (69), 64 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-02 23:04:15,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2021-11-02 23:04:15,885 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 33 [2021-11-02 23:04:15,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:04:15,885 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2021-11-02 23:04:15,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 5 states have internal predecessors, (22), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-02 23:04:15,886 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2021-11-02 23:04:15,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-02 23:04:15,887 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:04:15,887 INFO L513 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] [2021-11-02 23:04:15,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-02 23:04:15,887 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr1REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 32 more)] === [2021-11-02 23:04:15,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:04:15,888 INFO L85 PathProgramCache]: Analyzing trace with hash 875108530, now seen corresponding path program 1 times [2021-11-02 23:04:15,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:04:15,888 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130007071] [2021-11-02 23:04:15,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:04:15,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:04:15,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:15,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 23:04:15,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:15,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 23:04:15,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:16,043 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:04:16,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:04:16,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130007071] [2021-11-02 23:04:16,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130007071] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:04:16,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200388296] [2021-11-02 23:04:16,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:04:16,044 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:04:16,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:04:16,045 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:04:16,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-02 23:04:16,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:16,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-02 23:04:16,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:04:16,366 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:04:16,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200388296] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:04:16,366 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:04:16,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 10 [2021-11-02 23:04:16,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187544594] [2021-11-02 23:04:16,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 23:04:16,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:04:16,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 23:04:16,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-02 23:04:16,368 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand has 10 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-02 23:04:16,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:04:16,575 INFO L93 Difference]: Finished difference Result 86 states and 90 transitions. [2021-11-02 23:04:16,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 23:04:16,575 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2021-11-02 23:04:16,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:04:16,577 INFO L225 Difference]: With dead ends: 86 [2021-11-02 23:04:16,577 INFO L226 Difference]: Without dead ends: 81 [2021-11-02 23:04:16,577 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-02 23:04:16,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-02 23:04:16,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 76. [2021-11-02 23:04:16,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 56 states have (on average 1.3392857142857142) internal successors, (75), 70 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-02 23:04:16,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2021-11-02 23:04:16,581 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 33 [2021-11-02 23:04:16,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:04:16,581 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2021-11-02 23:04:16,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-02 23:04:16,581 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2021-11-02 23:04:16,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-02 23:04:16,583 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:04:16,583 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:04:16,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-02 23:04:16,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:04:16,784 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr1REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 32 more)] === [2021-11-02 23:04:16,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:04:16,784 INFO L85 PathProgramCache]: Analyzing trace with hash 316794142, now seen corresponding path program 2 times [2021-11-02 23:04:16,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:04:16,784 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884084259] [2021-11-02 23:04:16,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:04:16,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:04:16,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:16,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 23:04:16,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:16,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 23:04:16,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:16,970 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:04:16,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:04:16,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884084259] [2021-11-02 23:04:16,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884084259] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:04:16,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802239229] [2021-11-02 23:04:16,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:04:16,971 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:04:16,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:04:16,973 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:04:16,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-02 23:04:17,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:04:17,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:04:17,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-02 23:04:17,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:04:17,392 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:04:17,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802239229] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:04:17,393 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:04:17,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 11 [2021-11-02 23:04:17,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690048362] [2021-11-02 23:04:17,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-02 23:04:17,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:04:17,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-02 23:04:17,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-02 23:04:17,400 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand has 11 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-02 23:04:17,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:04:17,630 INFO L93 Difference]: Finished difference Result 92 states and 96 transitions. [2021-11-02 23:04:17,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 23:04:17,631 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 39 [2021-11-02 23:04:17,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:04:17,632 INFO L225 Difference]: With dead ends: 92 [2021-11-02 23:04:17,632 INFO L226 Difference]: Without dead ends: 87 [2021-11-02 23:04:17,632 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-11-02 23:04:17,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-02 23:04:17,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 82. [2021-11-02 23:04:17,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 62 states have (on average 1.3064516129032258) internal successors, (81), 76 states have internal predecessors, (81), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-02 23:04:17,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2021-11-02 23:04:17,635 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 39 [2021-11-02 23:04:17,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:04:17,636 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2021-11-02 23:04:17,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-02 23:04:17,636 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2021-11-02 23:04:17,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-02 23:04:17,638 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:04:17,638 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:04:17,681 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-02 23:04:17,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:04:17,849 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr1REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 32 more)] === [2021-11-02 23:04:17,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:04:17,849 INFO L85 PathProgramCache]: Analyzing trace with hash -806178678, now seen corresponding path program 3 times [2021-11-02 23:04:17,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:04:17,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267515362] [2021-11-02 23:04:17,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:04:17,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:04:17,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:17,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 23:04:17,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:18,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 23:04:18,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:18,143 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-02 23:04:18,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:04:18,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267515362] [2021-11-02 23:04:18,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267515362] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:04:18,144 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:04:18,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-02 23:04:18,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689506645] [2021-11-02 23:04:18,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 23:04:18,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:04:18,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 23:04:18,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-11-02 23:04:18,146 INFO L87 Difference]: Start difference. First operand 82 states and 86 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-02 23:04:18,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:04:18,508 INFO L93 Difference]: Finished difference Result 88 states and 91 transitions. [2021-11-02 23:04:18,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 23:04:18,509 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 45 [2021-11-02 23:04:18,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:04:18,510 INFO L225 Difference]: With dead ends: 88 [2021-11-02 23:04:18,510 INFO L226 Difference]: Without dead ends: 88 [2021-11-02 23:04:18,511 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-11-02 23:04:18,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-02 23:04:18,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 85. [2021-11-02 23:04:18,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 65 states have (on average 1.2923076923076924) internal successors, (84), 79 states have internal predecessors, (84), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-02 23:04:18,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2021-11-02 23:04:18,515 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 45 [2021-11-02 23:04:18,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:04:18,515 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2021-11-02 23:04:18,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-02 23:04:18,516 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2021-11-02 23:04:18,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-02 23:04:18,517 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:04:18,517 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:04:18,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-02 23:04:18,517 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr17ASSERT_VIOLATIONMEMORY_LEAK === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 32 more)] === [2021-11-02 23:04:18,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:04:18,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1643595517, now seen corresponding path program 1 times [2021-11-02 23:04:18,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:04:18,518 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849775590] [2021-11-02 23:04:18,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:04:18,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:04:18,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:18,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 23:04:18,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:18,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 23:04:18,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:19,101 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-02 23:04:19,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:04:19,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849775590] [2021-11-02 23:04:19,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849775590] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:04:19,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891994848] [2021-11-02 23:04:19,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:04:19,102 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:04:19,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:04:19,103 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:04:19,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-02 23:04:19,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:19,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-02 23:04:19,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:04:19,530 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-02 23:04:19,530 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 [2021-11-02 23:04:19,700 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-11-02 23:04:19,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 33 [2021-11-02 23:04:20,004 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-02 23:04:20,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-11-02 23:04:20,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 [2021-11-02 23:04:20,178 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-11-02 23:04:20,178 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 1 case distinctions, treesize of input 35 treesize of output 19 [2021-11-02 23:04:20,296 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-11-02 23:04:20,297 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 31 treesize of output 15 [2021-11-02 23:04:20,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:04:20,340 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 27 treesize of output 11 [2021-11-02 23:04:20,490 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 [2021-11-02 23:04:20,525 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:04:20,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891994848] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:04:20,525 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:04:20,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 20] total 34 [2021-11-02 23:04:20,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420658601] [2021-11-02 23:04:20,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-02 23:04:20,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:04:20,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-02 23:04:20,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1015, Unknown=0, NotChecked=0, Total=1122 [2021-11-02 23:04:20,528 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand has 34 states, 33 states have (on average 2.242424242424242) internal successors, (74), 30 states have internal predecessors, (74), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-02 23:04:21,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:04:21,378 INFO L93 Difference]: Finished difference Result 85 states and 88 transitions. [2021-11-02 23:04:21,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-02 23:04:21,378 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.242424242424242) internal successors, (74), 30 states have internal predecessors, (74), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2021-11-02 23:04:21,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:04:21,379 INFO L225 Difference]: With dead ends: 85 [2021-11-02 23:04:21,379 INFO L226 Difference]: Without dead ends: 85 [2021-11-02 23:04:21,382 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=255, Invalid=1725, Unknown=0, NotChecked=0, Total=1980 [2021-11-02 23:04:21,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-11-02 23:04:21,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2021-11-02 23:04:21,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 65 states have (on average 1.2769230769230768) internal successors, (83), 79 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-02 23:04:21,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2021-11-02 23:04:21,390 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 47 [2021-11-02 23:04:21,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:04:21,392 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2021-11-02 23:04:21,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.242424242424242) internal successors, (74), 30 states have internal predecessors, (74), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-02 23:04:21,392 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2021-11-02 23:04:21,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-02 23:04:21,393 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:04:21,393 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:04:21,416 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-02 23:04:21,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-02 23:04:21,597 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 32 more)] === [2021-11-02 23:04:21,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:04:21,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1985188135, now seen corresponding path program 1 times [2021-11-02 23:04:21,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:04:21,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589560257] [2021-11-02 23:04:21,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:04:21,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:04:21,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:21,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 23:04:21,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:21,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 23:04:21,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:22,216 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 23:04:22,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:04:22,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589560257] [2021-11-02 23:04:22,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589560257] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:04:22,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967439469] [2021-11-02 23:04:22,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:04:22,217 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:04:22,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:04:22,221 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:04:22,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-02 23:04:22,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:22,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 63 conjunts are in the unsatisfiable core [2021-11-02 23:04:22,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:04:22,581 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-02 23:04:22,582 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 [2021-11-02 23:04:22,663 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-02 23:04:22,663 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 3 case distinctions, treesize of input 17 treesize of output 22 [2021-11-02 23:04:22,887 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-11-02 23:04:22,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 33 [2021-11-02 23:04:23,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 [2021-11-02 23:04:23,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 [2021-11-02 23:04:23,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:04:23,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-02 23:04:23,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:04:23,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-02 23:04:23,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:04:23,204 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 49 [2021-11-02 23:04:23,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:04:23,215 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 67 treesize of output 60 [2021-11-02 23:04:23,477 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-02 23:04:23,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 73 treesize of output 66 [2021-11-02 23:04:23,494 INFO L354 Elim1Store]: treesize reduction 41, result has 21.2 percent of original size [2021-11-02 23:04:23,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 71 [2021-11-02 23:04:23,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:04:23,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:04:23,656 INFO L354 Elim1Store]: treesize reduction 78, result has 17.9 percent of original size [2021-11-02 23:04:23,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 100 treesize of output 96 [2021-11-02 23:04:23,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:04:23,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:04:23,687 INFO L354 Elim1Store]: treesize reduction 124, result has 17.9 percent of original size [2021-11-02 23:04:23,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 111 treesize of output 116 [2021-11-02 23:04:24,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:04:24,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:04:24,447 INFO L354 Elim1Store]: treesize reduction 109, result has 10.7 percent of original size [2021-11-02 23:04:24,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 120 treesize of output 103 [2021-11-02 23:04:24,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:04:24,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:04:24,473 INFO L354 Elim1Store]: treesize reduction 105, result has 9.5 percent of original size [2021-11-02 23:04:24,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 101 [2021-11-02 23:04:24,567 INFO L354 Elim1Store]: treesize reduction 118, result has 2.5 percent of original size [2021-11-02 23:04:24,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 114 treesize of output 86 [2021-11-02 23:04:24,597 INFO L354 Elim1Store]: treesize reduction 85, result has 8.6 percent of original size [2021-11-02 23:04:24,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 9 case distinctions, treesize of input 67 treesize of output 46 [2021-11-02 23:04:24,801 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:04:24,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967439469] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:04:24,801 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:04:24,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21] total 34 [2021-11-02 23:04:24,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105050610] [2021-11-02 23:04:24,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-02 23:04:24,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:04:24,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-02 23:04:24,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1055, Unknown=0, NotChecked=0, Total=1190 [2021-11-02 23:04:24,804 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand has 35 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 31 states have internal predecessors, (75), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-02 23:04:26,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:04:26,503 INFO L93 Difference]: Finished difference Result 97 states and 100 transitions. [2021-11-02 23:04:26,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-02 23:04:26,503 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 31 states have internal predecessors, (75), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 51 [2021-11-02 23:04:26,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:04:26,504 INFO L225 Difference]: With dead ends: 97 [2021-11-02 23:04:26,504 INFO L226 Difference]: Without dead ends: 97 [2021-11-02 23:04:26,506 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=371, Invalid=2179, Unknown=0, NotChecked=0, Total=2550 [2021-11-02 23:04:26,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-11-02 23:04:26,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 88. [2021-11-02 23:04:26,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 68 states have (on average 1.2794117647058822) internal successors, (87), 82 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-02 23:04:26,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2021-11-02 23:04:26,509 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 51 [2021-11-02 23:04:26,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:04:26,510 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2021-11-02 23:04:26,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 31 states have internal predecessors, (75), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-02 23:04:26,510 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2021-11-02 23:04:26,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-02 23:04:26,510 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:04:26,511 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:04:26,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-02 23:04:26,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-02 23:04:26,711 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr1REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 32 more)] === [2021-11-02 23:04:26,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:04:26,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1985188134, now seen corresponding path program 1 times [2021-11-02 23:04:26,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:04:26,712 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703924599] [2021-11-02 23:04:26,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:04:26,713 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:04:26,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:26,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 23:04:26,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:27,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 23:04:27,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:27,550 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 23:04:27,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:04:27,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703924599] [2021-11-02 23:04:27,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703924599] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:04:27,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576991847] [2021-11-02 23:04:27,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:04:27,551 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:04:27,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:04:27,556 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:04:27,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-02 23:04:27,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:27,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 67 conjunts are in the unsatisfiable core [2021-11-02 23:04:27,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:04:27,990 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-02 23:04:27,991 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 [2021-11-02 23:04:28,109 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-11-02 23:04:28,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 33 [2021-11-02 23:04:28,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 [2021-11-02 23:04:28,411 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-02 23:04:28,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-11-02 23:04:28,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 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 [2021-11-02 23:04:28,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 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 [2021-11-02 23:04:28,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 [2021-11-02 23:04:28,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:04:28,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-02 23:04:28,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:04:28,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-02 23:04:28,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:04:28,683 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 53 [2021-11-02 23:04:28,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:04:28,689 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 77 treesize of output 70 [2021-11-02 23:04:28,932 INFO L354 Elim1Store]: treesize reduction 41, result has 21.2 percent of original size [2021-11-02 23:04:28,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 81 treesize of output 83 [2021-11-02 23:04:28,945 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-02 23:04:28,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 66 [2021-11-02 23:04:29,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:04:29,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:04:29,101 INFO L354 Elim1Store]: treesize reduction 78, result has 17.9 percent of original size [2021-11-02 23:04:29,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 103 treesize of output 95 [2021-11-02 23:04:29,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:04:29,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:04:29,131 INFO L354 Elim1Store]: treesize reduction 124, result has 17.9 percent of original size [2021-11-02 23:04:29,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 114 treesize of output 119 [2021-11-02 23:04:29,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:04:29,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:04:29,706 INFO L354 Elim1Store]: treesize reduction 105, result has 9.5 percent of original size [2021-11-02 23:04:29,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 123 treesize of output 119 [2021-11-02 23:04:29,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:04:29,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:04:29,729 INFO L354 Elim1Store]: treesize reduction 109, result has 10.7 percent of original size [2021-11-02 23:04:29,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 87 [2021-11-02 23:04:29,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:04:29,791 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-02 23:04:29,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 111 treesize of output 80 [2021-11-02 23:04:29,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:04:29,808 INFO L354 Elim1Store]: treesize reduction 43, result has 8.5 percent of original size [2021-11-02 23:04:29,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 64 treesize of output 36 [2021-11-02 23:04:29,968 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:04:29,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576991847] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:04:29,969 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:04:29,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 36 [2021-11-02 23:04:29,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032703515] [2021-11-02 23:04:29,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-02 23:04:29,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:04:29,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-02 23:04:29,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1214, Unknown=0, NotChecked=0, Total=1332 [2021-11-02 23:04:29,971 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand has 37 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 33 states have internal predecessors, (78), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-02 23:04:31,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:04:31,883 INFO L93 Difference]: Finished difference Result 94 states and 97 transitions. [2021-11-02 23:04:31,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-02 23:04:31,884 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 33 states have internal predecessors, (78), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 51 [2021-11-02 23:04:31,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:04:31,885 INFO L225 Difference]: With dead ends: 94 [2021-11-02 23:04:31,885 INFO L226 Difference]: Without dead ends: 94 [2021-11-02 23:04:31,886 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=348, Invalid=2304, Unknown=0, NotChecked=0, Total=2652 [2021-11-02 23:04:31,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-02 23:04:31,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 91. [2021-11-02 23:04:31,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 71 states have (on average 1.267605633802817) internal successors, (90), 85 states have internal predecessors, (90), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-02 23:04:31,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2021-11-02 23:04:31,890 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 51 [2021-11-02 23:04:31,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:04:31,890 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2021-11-02 23:04:31,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 33 states have internal predecessors, (78), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-02 23:04:31,891 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2021-11-02 23:04:31,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-02 23:04:31,891 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:04:31,891 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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] [2021-11-02 23:04:31,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-02 23:04:32,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-02 23:04:32,105 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr17ASSERT_VIOLATIONMEMORY_LEAK === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 32 more)] === [2021-11-02 23:04:32,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:04:32,105 INFO L85 PathProgramCache]: Analyzing trace with hash -800316589, now seen corresponding path program 1 times [2021-11-02 23:04:32,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:04:32,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109148672] [2021-11-02 23:04:32,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:04:32,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:04:32,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:32,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 23:04:32,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:32,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 23:04:32,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:33,101 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:04:33,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:04:33,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109148672] [2021-11-02 23:04:33,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109148672] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:04:33,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181039021] [2021-11-02 23:04:33,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:04:33,102 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:04:33,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:04:33,105 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:04:33,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-02 23:04:33,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:33,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 80 conjunts are in the unsatisfiable core [2021-11-02 23:04:33,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:04:33,753 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-02 23:04:33,753 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 [2021-11-02 23:04:33,963 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-11-02 23:04:33,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 33 [2021-11-02 23:04:34,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 [2021-11-02 23:04:34,233 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-11-02 23:04:34,234 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 1 case distinctions, treesize of input 36 treesize of output 20 [2021-11-02 23:04:34,451 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-02 23:04:34,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-11-02 23:04:34,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 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 [2021-11-02 23:04:34,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 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 [2021-11-02 23:04:34,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 [2021-11-02 23:04:34,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-02 23:04:34,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:04:34,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-02 23:04:34,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:04:34,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-02 23:04:34,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:04:34,817 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 77 [2021-11-02 23:04:34,823 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-02 23:04:34,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 92 [2021-11-02 23:04:34,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:04:34,831 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 86 treesize of output 79 [2021-11-02 23:04:35,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:04:35,134 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 23:04:35,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 98 [2021-11-02 23:04:35,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:04:35,144 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 23:04:35,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 105 treesize of output 107 [2021-11-02 23:04:35,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:04:35,166 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-02 23:04:35,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 88 [2021-11-02 23:04:35,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:04:35,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:04:35,352 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-02 23:04:35,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 123 treesize of output 115 [2021-11-02 23:04:35,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:04:35,377 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-02 23:04:35,378 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 1 case distinctions, treesize of input 128 treesize of output 115 [2021-11-02 23:04:35,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:04:35,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:04:35,392 INFO L354 Elim1Store]: treesize reduction 43, result has 20.4 percent of original size [2021-11-02 23:04:35,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 109 treesize of output 114 [2021-11-02 23:04:36,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:04:36,145 INFO L354 Elim1Store]: treesize reduction 41, result has 21.2 percent of original size [2021-11-02 23:04:36,146 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 2 case distinctions, treesize of input 130 treesize of output 125 [2021-11-02 23:04:36,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:04:36,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:04:36,157 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-02 23:04:36,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 112 treesize of output 95 [2021-11-02 23:04:36,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:04:36,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:04:36,169 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-02 23:04:36,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 94 [2021-11-02 23:04:36,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:04:36,349 INFO L354 Elim1Store]: treesize reduction 16, result has 42.9 percent of original size [2021-11-02 23:04:36,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 100 treesize of output 75 [2021-11-02 23:04:36,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:04:36,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:04:36,365 INFO L354 Elim1Store]: treesize reduction 25, result has 10.7 percent of original size [2021-11-02 23:04:36,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 38 [2021-11-02 23:04:36,602 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 [2021-11-02 23:04:36,655 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:04:36,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181039021] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:04:36,655 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:04:36,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27] total 51 [2021-11-02 23:04:36,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272689218] [2021-11-02 23:04:36,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-02 23:04:36,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:04:36,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-02 23:04:36,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=2344, Unknown=0, NotChecked=0, Total=2550 [2021-11-02 23:04:36,658 INFO L87 Difference]: Start difference. First operand 91 states and 95 transitions. Second operand has 51 states, 50 states have (on average 1.88) internal successors, (94), 47 states have internal predecessors, (94), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-02 23:04:39,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:04:39,110 INFO L93 Difference]: Finished difference Result 91 states and 94 transitions. [2021-11-02 23:04:39,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-02 23:04:39,110 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 1.88) internal successors, (94), 47 states have internal predecessors, (94), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 53 [2021-11-02 23:04:39,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:04:39,111 INFO L225 Difference]: With dead ends: 91 [2021-11-02 23:04:39,111 INFO L226 Difference]: Without dead ends: 91 [2021-11-02 23:04:39,113 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=606, Invalid=4506, Unknown=0, NotChecked=0, Total=5112 [2021-11-02 23:04:39,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-02 23:04:39,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2021-11-02 23:04:39,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 71 states have (on average 1.2535211267605635) internal successors, (89), 85 states have internal predecessors, (89), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-02 23:04:39,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 94 transitions. [2021-11-02 23:04:39,117 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 94 transitions. Word has length 53 [2021-11-02 23:04:39,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:04:39,118 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 94 transitions. [2021-11-02 23:04:39,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 1.88) internal successors, (94), 47 states have internal predecessors, (94), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-02 23:04:39,118 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 94 transitions. [2021-11-02 23:04:39,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-02 23:04:39,119 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:04:39,119 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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] [2021-11-02 23:04:39,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-02 23:04:39,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-02 23:04:39,333 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 32 more)] === [2021-11-02 23:04:39,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:04:39,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1131269847, now seen corresponding path program 2 times [2021-11-02 23:04:39,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:04:39,334 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755155585] [2021-11-02 23:04:39,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:04:39,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:04:39,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:39,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 23:04:39,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:39,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 23:04:39,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:40,971 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 10 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:04:40,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:04:40,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755155585] [2021-11-02 23:04:40,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755155585] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:04:40,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506793468] [2021-11-02 23:04:40,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:04:40,972 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:04:40,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:04:40,973 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:04:40,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-02 23:04:41,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:04:41,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:04:41,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 74 conjunts are in the unsatisfiable core [2021-11-02 23:04:41,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:04:41,537 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-02 23:04:41,538 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 [2021-11-02 23:04:41,668 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-11-02 23:04:41,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 33 [2021-11-02 23:04:41,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 [2021-11-02 23:04:41,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:04:41,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-02 23:04:41,924 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-02 23:04:41,925 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 31 [2021-11-02 23:04:42,023 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [dll_circular_create_~head~0.offset] [2021-11-02 23:04:42,024 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:04:42,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2021-11-02 23:04:42,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234438839] [2021-11-02 23:04:42,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-02 23:04:42,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:04:42,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-02 23:04:42,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=954, Unknown=0, NotChecked=0, Total=1056 [2021-11-02 23:04:42,026 INFO L87 Difference]: Start difference. First operand 91 states and 94 transitions. Second operand has 28 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 25 states have internal predecessors, (52), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-02 23:04:44,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:04:44,525 INFO L93 Difference]: Finished difference Result 103 states and 107 transitions. [2021-11-02 23:04:44,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-02 23:04:44,526 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 25 states have internal predecessors, (52), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 57 [2021-11-02 23:04:44,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:04:44,528 INFO L225 Difference]: With dead ends: 103 [2021-11-02 23:04:44,528 INFO L226 Difference]: Without dead ends: 103 [2021-11-02 23:04:44,529 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=320, Invalid=2332, Unknown=0, NotChecked=0, Total=2652 [2021-11-02 23:04:44,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-02 23:04:44,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 94. [2021-11-02 23:04:44,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 74 states have (on average 1.2702702702702702) internal successors, (94), 88 states have internal predecessors, (94), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-02 23:04:44,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 99 transitions. [2021-11-02 23:04:44,532 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 99 transitions. Word has length 57 [2021-11-02 23:04:44,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:04:44,532 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 99 transitions. [2021-11-02 23:04:44,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 25 states have internal predecessors, (52), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-02 23:04:44,532 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 99 transitions. [2021-11-02 23:04:44,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-02 23:04:44,533 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:04:44,533 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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] [2021-11-02 23:04:44,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-02 23:04:44,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:04:44,736 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr1REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 32 more)] === [2021-11-02 23:04:44,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:04:44,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1131269846, now seen corresponding path program 2 times [2021-11-02 23:04:44,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:04:44,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503186247] [2021-11-02 23:04:44,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:04:44,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:04:44,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:45,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 23:04:45,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:45,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 23:04:45,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:46,109 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:04:46,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:04:46,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503186247] [2021-11-02 23:04:46,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503186247] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:04:46,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872062183] [2021-11-02 23:04:46,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:04:46,111 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:04:46,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:04:46,112 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:04:46,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-02 23:04:46,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:04:46,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:04:46,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 90 conjunts are in the unsatisfiable core [2021-11-02 23:04:46,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:04:46,714 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-02 23:04:46,714 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 [2021-11-02 23:04:46,858 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-11-02 23:04:46,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 33 [2021-11-02 23:04:46,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 [2021-11-02 23:04:46,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 [2021-11-02 23:04:47,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:04:47,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-02 23:04:47,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:04:47,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-02 23:04:47,173 INFO L354 Elim1Store]: treesize reduction 47, result has 16.1 percent of original size [2021-11-02 23:04:47,174 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 112 treesize of output 78 [2021-11-02 23:04:47,189 INFO L354 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2021-11-02 23:04:47,190 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 80 [2021-11-02 23:04:47,458 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-11-02 23:04:47,458 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 1 case distinctions, treesize of input 22 treesize of output 32 [2021-11-02 23:04:47,507 INFO L354 Elim1Store]: treesize reduction 24, result has 41.5 percent of original size [2021-11-02 23:04:47,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 29 [2021-11-02 23:04:47,704 INFO L354 Elim1Store]: treesize reduction 65, result has 16.7 percent of original size [2021-11-02 23:04:47,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 99 treesize of output 88 [2021-11-02 23:04:47,719 INFO L354 Elim1Store]: treesize reduction 57, result has 16.2 percent of original size [2021-11-02 23:04:47,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 95 treesize of output 88 [2021-11-02 23:04:47,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:04:47,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:04:47,943 INFO L354 Elim1Store]: treesize reduction 83, result has 11.7 percent of original size [2021-11-02 23:04:47,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 121 treesize of output 106 [2021-11-02 23:04:47,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:04:47,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:04:47,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:04:47,957 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-02 23:04:47,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 69 [2021-11-02 23:04:48,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:04:48,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:04:48,095 INFO L354 Elim1Store]: treesize reduction 59, result has 10.6 percent of original size [2021-11-02 23:04:48,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 204 treesize of output 112 [2021-11-02 23:04:48,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:04:48,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:04:48,117 INFO L354 Elim1Store]: treesize reduction 133, result has 11.3 percent of original size [2021-11-02 23:04:48,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 194 treesize of output 166 [2021-11-02 23:04:48,535 INFO L354 Elim1Store]: treesize reduction 212, result has 15.2 percent of original size [2021-11-02 23:04:48,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 164 treesize of output 151 [2021-11-02 23:04:48,568 INFO L354 Elim1Store]: treesize reduction 92, result has 24.6 percent of original size [2021-11-02 23:04:48,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 130 treesize of output 108 [2021-11-02 23:04:48,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:04:48,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:04:48,812 INFO L354 Elim1Store]: treesize reduction 138, result has 14.8 percent of original size [2021-11-02 23:04:48,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 13 case distinctions, treesize of input 172 treesize of output 137 [2021-11-02 23:04:48,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:04:48,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:04:48,862 INFO L354 Elim1Store]: treesize reduction 248, result has 14.5 percent of original size [2021-11-02 23:04:48,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 189 treesize of output 200 [2021-11-02 23:04:49,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:04:49,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:04:49,804 INFO L354 Elim1Store]: treesize reduction 169, result has 7.1 percent of original size [2021-11-02 23:04:49,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 196 treesize of output 148 [2021-11-02 23:04:49,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:04:49,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:04:49,850 INFO L354 Elim1Store]: treesize reduction 197, result has 5.3 percent of original size [2021-11-02 23:04:49,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 181 treesize of output 179 [2021-11-02 23:04:50,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:04:50,598 INFO L354 Elim1Store]: treesize reduction 316, result has 13.9 percent of original size [2021-11-02 23:04:50,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 25 case distinctions, treesize of input 214 treesize of output 162 [2021-11-02 23:04:50,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:04:50,670 INFO L354 Elim1Store]: treesize reduction 308, result has 14.7 percent of original size [2021-11-02 23:04:50,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 25 case distinctions, treesize of input 163 treesize of output 157 [2021-11-02 23:04:50,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:04:50,898 INFO L354 Elim1Store]: treesize reduction 221, result has 12.6 percent of original size [2021-11-02 23:04:50,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 11 new quantified variables, introduced 25 case distinctions, treesize of input 208 treesize of output 137 [2021-11-02 23:04:50,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:04:50,938 INFO L354 Elim1Store]: treesize reduction 158, result has 1.9 percent of original size [2021-11-02 23:04:50,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 9 new quantified variables, introduced 25 case distinctions, treesize of input 113 treesize of output 80 [2021-11-02 23:04:51,270 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 10 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:04:51,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872062183] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:04:51,270 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:04:51,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 23] total 46 [2021-11-02 23:04:51,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373729711] [2021-11-02 23:04:51,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-02 23:04:51,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:04:51,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-02 23:04:51,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=2038, Unknown=0, NotChecked=0, Total=2162 [2021-11-02 23:04:51,273 INFO L87 Difference]: Start difference. First operand 94 states and 99 transitions. Second operand has 47 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 43 states have internal predecessors, (91), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-02 23:04:57,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:04:57,298 INFO L93 Difference]: Finished difference Result 100 states and 103 transitions. [2021-11-02 23:04:57,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-02 23:04:57,299 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 43 states have internal predecessors, (91), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 57 [2021-11-02 23:04:57,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:04:57,300 INFO L225 Difference]: With dead ends: 100 [2021-11-02 23:04:57,300 INFO L226 Difference]: Without dead ends: 100 [2021-11-02 23:04:57,302 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=451, Invalid=3971, Unknown=0, NotChecked=0, Total=4422 [2021-11-02 23:04:57,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-11-02 23:04:57,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 97. [2021-11-02 23:04:57,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 77 states have (on average 1.2467532467532467) internal successors, (96), 91 states have internal predecessors, (96), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-02 23:04:57,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2021-11-02 23:04:57,307 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 57 [2021-11-02 23:04:57,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:04:57,307 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2021-11-02 23:04:57,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 43 states have internal predecessors, (91), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-02 23:04:57,308 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2021-11-02 23:04:57,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-02 23:04:57,308 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:04:57,309 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:04:57,361 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-02 23:04:57,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:04:57,537 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr17ASSERT_VIOLATIONMEMORY_LEAK === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 32 more)] === [2021-11-02 23:04:57,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:04:57,537 INFO L85 PathProgramCache]: Analyzing trace with hash -523595357, now seen corresponding path program 2 times [2021-11-02 23:04:57,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:04:57,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045476367] [2021-11-02 23:04:57,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:04:57,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:04:57,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:58,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 23:04:58,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:58,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 23:04:58,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:59,636 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:04:59,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:04:59,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045476367] [2021-11-02 23:04:59,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045476367] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:04:59,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991725796] [2021-11-02 23:04:59,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:04:59,639 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:04:59,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:04:59,641 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:04:59,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-02 23:05:00,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:05:00,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:05:00,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 112 conjunts are in the unsatisfiable core [2021-11-02 23:05:00,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:05:00,412 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 [2021-11-02 23:05:00,568 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-02 23:05:00,569 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 [2021-11-02 23:05:00,707 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-11-02 23:05:00,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 33 [2021-11-02 23:05:00,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 [2021-11-02 23:05:00,937 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-11-02 23:05:00,938 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 1 case distinctions, treesize of input 36 treesize of output 20 [2021-11-02 23:05:01,170 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-02 23:05:01,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2021-11-02 23:05:01,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 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 [2021-11-02 23:05:01,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 [2021-11-02 23:05:01,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 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 [2021-11-02 23:05:01,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-02 23:05:01,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:05:01,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-02 23:05:01,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:05:01,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-02 23:05:01,724 INFO L354 Elim1Store]: treesize reduction 47, result has 16.1 percent of original size [2021-11-02 23:05:01,725 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 172 treesize of output 114 [2021-11-02 23:05:01,741 INFO L354 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2021-11-02 23:05:01,742 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 162 treesize of output 134 [2021-11-02 23:05:01,750 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-02 23:05:01,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 93 [2021-11-02 23:05:02,076 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-11-02 23:05:02,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 29 [2021-11-02 23:05:02,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 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 [2021-11-02 23:05:02,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:05:02,332 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 23:05:02,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 102 [2021-11-02 23:05:02,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:05:02,343 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 23:05:02,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 115 [2021-11-02 23:05:02,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:05:02,353 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-02 23:05:02,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 96 [2021-11-02 23:05:02,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:05:02,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:05:02,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:05:02,569 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-02 23:05:02,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 147 treesize of output 116 [2021-11-02 23:05:02,590 INFO L354 Elim1Store]: treesize reduction 56, result has 25.3 percent of original size [2021-11-02 23:05:02,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 132 treesize of output 118 [2021-11-02 23:05:02,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:05:02,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:05:02,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:05:02,608 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-02 23:05:02,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 122 [2021-11-02 23:05:02,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:05:02,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:05:02,787 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-02 23:05:02,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 265 treesize of output 134 [2021-11-02 23:05:02,804 INFO L354 Elim1Store]: treesize reduction 56, result has 1.8 percent of original size [2021-11-02 23:05:02,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 255 treesize of output 203 [2021-11-02 23:05:02,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:05:02,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:05:02,818 INFO L354 Elim1Store]: treesize reduction 73, result has 18.9 percent of original size [2021-11-02 23:05:02,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 194 treesize of output 193 [2021-11-02 23:05:03,236 INFO L354 Elim1Store]: treesize reduction 164, result has 18.8 percent of original size [2021-11-02 23:05:03,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 185 treesize of output 193 [2021-11-02 23:05:03,263 INFO L354 Elim1Store]: treesize reduction 100, result has 18.0 percent of original size [2021-11-02 23:05:03,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 181 treesize of output 139 [2021-11-02 23:05:03,285 INFO L354 Elim1Store]: treesize reduction 152, result has 15.1 percent of original size [2021-11-02 23:05:03,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 177 treesize of output 167 [2021-11-02 23:05:03,489 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 13 treesize of output 9 [2021-11-02 23:05:03,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:05:03,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:05:03,553 INFO L354 Elim1Store]: treesize reduction 206, result has 14.9 percent of original size [2021-11-02 23:05:03,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 207 treesize of output 218 [2021-11-02 23:05:03,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:05:03,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:05:03,600 INFO L354 Elim1Store]: treesize reduction 180, result has 14.3 percent of original size [2021-11-02 23:05:03,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 13 case distinctions, treesize of input 206 treesize of output 167 [2021-11-02 23:05:03,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:05:03,614 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-11-02 23:05:03,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 223 treesize of output 213 [2021-11-02 23:05:04,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:05:04,909 INFO L354 Elim1Store]: treesize reduction 116, result has 18.9 percent of original size [2021-11-02 23:05:04,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 235 treesize of output 224 [2021-11-02 23:05:04,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:05:04,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:05:04,948 INFO L354 Elim1Store]: treesize reduction 169, result has 7.1 percent of original size [2021-11-02 23:05:04,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 16 case distinctions, treesize of input 212 treesize of output 160 [2021-11-02 23:05:04,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:05:04,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:05:04,977 INFO L354 Elim1Store]: treesize reduction 197, result has 5.3 percent of original size [2021-11-02 23:05:04,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 16 case distinctions, treesize of input 197 treesize of output 199 [2021-11-02 23:05:06,510 INFO L354 Elim1Store]: treesize reduction 116, result has 11.5 percent of original size [2021-11-02 23:05:06,510 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 236 treesize of output 227 [2021-11-02 23:05:06,626 INFO L354 Elim1Store]: treesize reduction 514, result has 12.3 percent of original size [2021-11-02 23:05:06,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 214 treesize of output 219 [2021-11-02 23:05:06,734 INFO L354 Elim1Store]: treesize reduction 430, result has 10.8 percent of original size [2021-11-02 23:05:06,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 10 new quantified variables, introduced 28 case distinctions, treesize of input 199 treesize of output 148 [2021-11-02 23:05:07,148 INFO L354 Elim1Store]: treesize reduction 141, result has 10.2 percent of original size [2021-11-02 23:05:07,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 276 treesize of output 138 [2021-11-02 23:05:07,219 INFO L354 Elim1Store]: treesize reduction 240, result has 2.8 percent of original size [2021-11-02 23:05:07,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 28 case distinctions, treesize of input 94 treesize of output 72 [2021-11-02 23:05:07,458 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 [2021-11-02 23:05:07,549 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:05:07,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991725796] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:07,550 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:05:07,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 66 [2021-11-02 23:05:07,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228763431] [2021-11-02 23:05:07,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-11-02 23:05:07,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:05:07,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-11-02 23:05:07,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=4010, Unknown=0, NotChecked=0, Total=4290 [2021-11-02 23:05:07,554 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand has 66 states, 65 states have (on average 1.6153846153846154) internal successors, (105), 62 states have internal predecessors, (105), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-02 23:05:19,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:05:19,611 INFO L93 Difference]: Finished difference Result 97 states and 100 transitions. [2021-11-02 23:05:19,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-02 23:05:19,612 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 65 states have (on average 1.6153846153846154) internal successors, (105), 62 states have internal predecessors, (105), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 59 [2021-11-02 23:05:19,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:05:19,612 INFO L225 Difference]: With dead ends: 97 [2021-11-02 23:05:19,613 INFO L226 Difference]: Without dead ends: 97 [2021-11-02 23:05:19,616 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2052 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=820, Invalid=8108, Unknown=2, NotChecked=0, Total=8930 [2021-11-02 23:05:19,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-11-02 23:05:19,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2021-11-02 23:05:19,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 77 states have (on average 1.2337662337662338) internal successors, (95), 91 states have internal predecessors, (95), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-02 23:05:19,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 100 transitions. [2021-11-02 23:05:19,620 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 100 transitions. Word has length 59 [2021-11-02 23:05:19,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:05:19,621 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 100 transitions. [2021-11-02 23:05:19,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 65 states have (on average 1.6153846153846154) internal successors, (105), 62 states have internal predecessors, (105), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-02 23:05:19,621 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 100 transitions. [2021-11-02 23:05:19,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-02 23:05:19,622 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:19,622 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:05:19,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-02 23:05:19,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:05:19,822 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 32 more)] === [2021-11-02 23:05:19,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:19,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1888548729, now seen corresponding path program 3 times [2021-11-02 23:05:19,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:05:19,823 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599819448] [2021-11-02 23:05:19,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:19,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:05:19,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:20,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 23:05:20,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:20,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 23:05:20,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:22,273 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:05:22,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:05:22,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599819448] [2021-11-02 23:05:22,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599819448] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:22,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870673329] [2021-11-02 23:05:22,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:05:22,274 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:05:22,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:05:22,277 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:05:22,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-02 23:05:31,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-02 23:05:31,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:05:31,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 106 conjunts are in the unsatisfiable core [2021-11-02 23:05:31,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:05:31,218 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 [2021-11-02 23:05:31,387 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-02 23:05:31,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2021-11-02 23:05:31,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 [2021-11-02 23:05:31,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:05:31,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-02 23:05:31,604 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-02 23:05:31,604 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 31 [2021-11-02 23:05:31,682 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [dll_circular_create_~head~0.offset] [2021-11-02 23:05:31,682 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:05:31,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2021-11-02 23:05:31,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69312047] [2021-11-02 23:05:31,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-02 23:05:31,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:05:31,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-02 23:05:31,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1858, Unknown=0, NotChecked=0, Total=1980 [2021-11-02 23:05:31,685 INFO L87 Difference]: Start difference. First operand 97 states and 100 transitions. Second operand has 36 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 33 states have internal predecessors, (58), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-02 23:05:35,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:05:35,842 INFO L93 Difference]: Finished difference Result 106 states and 110 transitions. [2021-11-02 23:05:35,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-02 23:05:35,843 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 33 states have internal predecessors, (58), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 63 [2021-11-02 23:05:35,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:05:35,844 INFO L225 Difference]: With dead ends: 106 [2021-11-02 23:05:35,844 INFO L226 Difference]: Without dead ends: 106 [2021-11-02 23:05:35,846 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=353, Invalid=4069, Unknown=0, NotChecked=0, Total=4422 [2021-11-02 23:05:35,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-11-02 23:05:35,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 100. [2021-11-02 23:05:35,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 80 states have (on average 1.25) internal successors, (100), 94 states have internal predecessors, (100), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-02 23:05:35,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 105 transitions. [2021-11-02 23:05:35,849 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 105 transitions. Word has length 63 [2021-11-02 23:05:35,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:05:35,850 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 105 transitions. [2021-11-02 23:05:35,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 33 states have internal predecessors, (58), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-02 23:05:35,850 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 105 transitions. [2021-11-02 23:05:35,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-02 23:05:35,850 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:35,851 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:05:35,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-02 23:05:36,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-02 23:05:36,051 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr1REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 32 more)] === [2021-11-02 23:05:36,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:36,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1888548730, now seen corresponding path program 3 times [2021-11-02 23:05:36,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:05:36,052 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796951849] [2021-11-02 23:05:36,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:36,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:05:36,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:36,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 23:05:36,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:36,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 23:05:36,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:38,537 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:05:38,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:05:38,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796951849] [2021-11-02 23:05:38,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796951849] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:38,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089326643] [2021-11-02 23:05:38,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:05:38,538 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:05:38,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:05:38,539 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:05:38,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-02 23:05:42,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-02 23:05:42,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:05:42,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 118 conjunts are in the unsatisfiable core [2021-11-02 23:05:42,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:05:42,322 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 [2021-11-02 23:05:42,409 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 [2021-11-02 23:05:42,419 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-02 23:05:42,419 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 [2021-11-02 23:05:42,672 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-02 23:05:42,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2021-11-02 23:05:42,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2021-11-02 23:05:42,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 [2021-11-02 23:05:42,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 [2021-11-02 23:05:42,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:05:42,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-02 23:05:42,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:05:42,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-02 23:05:43,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:05:43,085 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 49 [2021-11-02 23:05:43,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:05:43,089 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 67 treesize of output 60 [2021-11-02 23:05:43,359 INFO L354 Elim1Store]: treesize reduction 46, result has 27.0 percent of original size [2021-11-02 23:05:43,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2021-11-02 23:05:43,374 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 23:05:43,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-02 23:05:43,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:05:43,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:05:43,587 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 23:05:43,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 70 [2021-11-02 23:05:43,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:05:43,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:05:43,599 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 23:05:43,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 81 [2021-11-02 23:05:43,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:05:43,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:05:43,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:05:43,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:05:43,862 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 23:05:43,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 105 treesize of output 84 [2021-11-02 23:05:43,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:05:43,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:05:43,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:05:43,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:05:43,875 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 23:05:43,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 90 treesize of output 84 [2021-11-02 23:05:44,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:05:44,165 INFO L354 Elim1Store]: treesize reduction 184, result has 14.8 percent of original size [2021-11-02 23:05:44,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 236 treesize of output 139 [2021-11-02 23:05:44,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:05:44,197 INFO L354 Elim1Store]: treesize reduction 138, result has 17.9 percent of original size [2021-11-02 23:05:44,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 226 treesize of output 180 [2021-11-02 23:05:44,634 INFO L354 Elim1Store]: treesize reduction 176, result has 17.8 percent of original size [2021-11-02 23:05:44,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 202 treesize of output 210 [2021-11-02 23:05:44,685 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 23:05:44,685 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 11 treesize of output 11 [2021-11-02 23:05:44,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:05:44,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:05:44,995 INFO L354 Elim1Store]: treesize reduction 176, result has 18.1 percent of original size [2021-11-02 23:05:44,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 227 treesize of output 163 [2021-11-02 23:05:45,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:05:45,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:05:45,029 INFO L354 Elim1Store]: treesize reduction 176, result has 13.3 percent of original size [2021-11-02 23:05:45,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 193 treesize of output 179 [2021-11-02 23:05:45,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:05:45,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:05:45,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:05:45,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:05:45,384 INFO L354 Elim1Store]: treesize reduction 228, result has 10.6 percent of original size [2021-11-02 23:05:45,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 219 treesize of output 174 [2021-11-02 23:05:45,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:05:45,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:05:45,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:05:45,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:05:45,431 INFO L354 Elim1Store]: treesize reduction 216, result has 11.1 percent of original size [2021-11-02 23:05:45,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 11 case distinctions, treesize of input 204 treesize of output 182 [2021-11-02 23:05:45,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:05:45,855 INFO L354 Elim1Store]: treesize reduction 360, result has 12.2 percent of original size [2021-11-02 23:05:45,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 480 treesize of output 279 [2021-11-02 23:05:45,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:05:45,964 INFO L354 Elim1Store]: treesize reduction 280, result has 13.0 percent of original size [2021-11-02 23:05:45,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 314 treesize of output 201 [2021-11-02 23:05:49,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:05:49,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:05:49,691 INFO L354 Elim1Store]: treesize reduction 514, result has 12.6 percent of original size [2021-11-02 23:05:49,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 20 case distinctions, treesize of input 295 treesize of output 250 [2021-11-02 23:05:49,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:05:49,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:05:49,767 INFO L354 Elim1Store]: treesize reduction 298, result has 11.3 percent of original size [2021-11-02 23:05:49,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 20 case distinctions, treesize of input 309 treesize of output 240 [2021-11-02 23:05:56,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:05:56,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:05:56,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:05:56,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:05:56,345 INFO L354 Elim1Store]: treesize reduction 664, result has 11.2 percent of original size [2021-11-02 23:05:56,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 26 case distinctions, treesize of input 351 treesize of output 303 [2021-11-02 23:05:56,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:05:56,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:05:56,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:05:56,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:05:56,438 INFO L354 Elim1Store]: treesize reduction 382, result has 8.6 percent of original size [2021-11-02 23:05:56,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 11 new quantified variables, introduced 26 case distinctions, treesize of input 306 treesize of output 251 [2021-11-02 23:07:42,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:07:42,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:07:42,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:07:42,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:07:42,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:07:42,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:07:42,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:07:42,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:07:42,713 INFO L354 Elim1Store]: treesize reduction 1328, result has 7.2 percent of original size [2021-11-02 23:07:42,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 4 disjoint index pairs (out of 45 index pairs), introduced 13 new quantified variables, introduced 50 case distinctions, treesize of input 529 treesize of output 415 [2021-11-02 23:07:42,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:07:42,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:07:42,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:07:42,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:07:42,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:07:42,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:07:42,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:07:42,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:07:42,971 INFO L354 Elim1Store]: treesize reduction 830, result has 6.2 percent of original size [2021-11-02 23:07:42,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 3 disjoint index pairs (out of 45 index pairs), introduced 15 new quantified variables, introduced 50 case distinctions, treesize of input 514 treesize of output 374 [2021-11-02 23:08:59,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:08:59,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:08:59,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:08:59,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:08:59,486 INFO L354 Elim1Store]: treesize reduction 1384, result has 7.8 percent of original size [2021-11-02 23:08:59,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 2 disjoint index pairs (out of 45 index pairs), introduced 13 new quantified variables, introduced 52 case distinctions, treesize of input 523 treesize of output 419 [2021-11-02 23:08:59,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:08:59,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:08:59,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:08:59,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:08:59,751 INFO L354 Elim1Store]: treesize reduction 904, result has 7.7 percent of original size [2021-11-02 23:08:59,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 2 disjoint index pairs (out of 45 index pairs), introduced 15 new quantified variables, introduced 52 case distinctions, treesize of input 508 treesize of output 366 [2021-11-02 23:09:32,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:09:32,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:09:32,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:09:32,591 INFO L354 Elim1Store]: treesize reduction 1080, result has 7.1 percent of original size [2021-11-02 23:09:32,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 2 disjoint index pairs (out of 36 index pairs), introduced 12 new quantified variables, introduced 42 case distinctions, treesize of input 391 treesize of output 316 [2021-11-02 23:09:32,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:09:32,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:09:32,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:09:32,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:09:32,739 INFO L354 Elim1Store]: treesize reduction 562, result has 8.5 percent of original size [2021-11-02 23:09:32,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 2 disjoint index pairs (out of 36 index pairs), introduced 15 new quantified variables, introduced 38 case distinctions, treesize of input 359 treesize of output 255 [2021-11-02 23:09:33,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:09:33,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:09:33,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:09:33,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:09:33,484 INFO L354 Elim1Store]: treesize reduction 854, result has 4.8 percent of original size [2021-11-02 23:09:33,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 15 new quantified variables, introduced 44 case distinctions, treesize of input 474 treesize of output 293 [2021-11-02 23:09:33,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:09:33,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:09:33,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:09:33,570 INFO L354 Elim1Store]: treesize reduction 478, result has 1.4 percent of original size [2021-11-02 23:09:33,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 16 new quantified variables, introduced 44 case distinctions, treesize of input 240 treesize of output 146 [2021-11-02 23:09:40,301 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:09:40,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089326643] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:40,301 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:09:40,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 33] total 68 [2021-11-02 23:09:40,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115879532] [2021-11-02 23:09:40,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-11-02 23:09:40,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:09:40,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-11-02 23:09:40,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=4490, Unknown=3, NotChecked=0, Total=4692 [2021-11-02 23:09:40,305 INFO L87 Difference]: Start difference. First operand 100 states and 105 transitions. Second operand has 69 states, 68 states have (on average 1.6764705882352942) internal successors, (114), 65 states have internal predecessors, (114), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-02 23:11:56,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:11:56,918 INFO L93 Difference]: Finished difference Result 114 states and 118 transitions. [2021-11-02 23:11:56,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-02 23:11:56,919 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 68 states have (on average 1.6764705882352942) internal successors, (114), 65 states have internal predecessors, (114), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 63 [2021-11-02 23:11:56,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:11:56,920 INFO L225 Difference]: With dead ends: 114 [2021-11-02 23:11:56,920 INFO L226 Difference]: Without dead ends: 114 [2021-11-02 23:11:56,924 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1587 ImplicationChecksByTransitivity, 71.3s TimeCoverageRelationStatistics Valid=710, Invalid=8577, Unknown=25, NotChecked=0, Total=9312 [2021-11-02 23:11:56,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-02 23:11:56,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 104. [2021-11-02 23:11:56,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 84 states have (on average 1.25) internal successors, (105), 98 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-02 23:11:56,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 110 transitions. [2021-11-02 23:11:56,929 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 110 transitions. Word has length 63 [2021-11-02 23:11:56,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:11:56,930 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 110 transitions. [2021-11-02 23:11:56,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 68 states have (on average 1.6764705882352942) internal successors, (114), 65 states have internal predecessors, (114), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-02 23:11:56,931 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 110 transitions. [2021-11-02 23:11:56,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-02 23:11:56,931 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:11:56,932 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:11:56,965 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-11-02 23:11:57,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-02 23:11:57,137 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr6REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 32 more)] === [2021-11-02 23:11:57,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:11:57,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1888548691, now seen corresponding path program 1 times [2021-11-02 23:11:57,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:11:57,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480571357] [2021-11-02 23:11:57,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:11:57,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:11:57,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:57,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 23:11:57,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:57,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 23:11:57,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:58,125 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-02 23:11:58,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:11:58,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480571357] [2021-11-02 23:11:58,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480571357] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:11:58,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007721711] [2021-11-02 23:11:58,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:11:58,126 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:11:58,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:11:58,129 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:11:58,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-02 23:11:59,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:59,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-02 23:11:59,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:12:00,212 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-02 23:12:00,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007721711] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:12:00,213 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:12:00,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 10 [2021-11-02 23:12:00,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251124848] [2021-11-02 23:12:00,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 23:12:00,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:12:00,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 23:12:00,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-11-02 23:12:00,215 INFO L87 Difference]: Start difference. First operand 104 states and 110 transitions. Second operand has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-02 23:12:01,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:12:01,276 INFO L93 Difference]: Finished difference Result 104 states and 108 transitions. [2021-11-02 23:12:01,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 23:12:01,277 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 63 [2021-11-02 23:12:01,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:12:01,278 INFO L225 Difference]: With dead ends: 104 [2021-11-02 23:12:01,278 INFO L226 Difference]: Without dead ends: 104 [2021-11-02 23:12:01,278 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-02 23:12:01,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-02 23:12:01,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 102. [2021-11-02 23:12:01,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 84 states have (on average 1.2142857142857142) internal successors, (102), 96 states have internal predecessors, (102), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-02 23:12:01,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 107 transitions. [2021-11-02 23:12:01,283 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 107 transitions. Word has length 63 [2021-11-02 23:12:01,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:12:01,284 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 107 transitions. [2021-11-02 23:12:01,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-02 23:12:01,284 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 107 transitions. [2021-11-02 23:12:01,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-02 23:12:01,285 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:12:01,286 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:12:01,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-02 23:12:01,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-02 23:12:01,501 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr17ASSERT_VIOLATIONMEMORY_LEAK === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 32 more)] === [2021-11-02 23:12:01,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:12:01,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1875835917, now seen corresponding path program 3 times [2021-11-02 23:12:01,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:12:01,501 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270032872] [2021-11-02 23:12:01,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:12:01,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:12:01,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:04,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 23:12:04,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:05,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 23:12:05,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:16,995 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:12:16,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:12:16,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270032872] [2021-11-02 23:12:16,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270032872] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:12:16,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461118985] [2021-11-02 23:12:16,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:12:16,996 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:12:16,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:12:16,997 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:12:16,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-02 23:12:21,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-02 23:12:21,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:12:21,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 153 conjunts are in the unsatisfiable core [2021-11-02 23:12:21,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:12:21,922 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 [2021-11-02 23:12:23,084 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-02 23:12:23,085 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 [2021-11-02 23:12:23,805 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 [2021-11-02 23:12:24,324 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 27 treesize of output 11 [2021-11-02 23:12:25,564 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-02 23:12:25,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2021-11-02 23:12:26,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 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 [2021-11-02 23:12:26,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 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 [2021-11-02 23:12:26,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 [2021-11-02 23:12:27,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-02 23:12:27,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:12:27,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-02 23:12:27,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:12:27,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-02 23:12:28,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:12:28,067 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 82 [2021-11-02 23:12:28,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:12:28,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:12:28,097 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-02 23:12:28,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 130 treesize of output 103 [2021-11-02 23:12:28,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:12:28,121 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 97 treesize of output 90 [2021-11-02 23:12:29,922 INFO L354 Elim1Store]: treesize reduction 72, result has 35.7 percent of original size [2021-11-02 23:12:29,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 57 [2021-11-02 23:12:31,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:12:31,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:12:31,174 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 23:12:31,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 142 treesize of output 111 [2021-11-02 23:12:31,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:12:31,259 INFO L354 Elim1Store]: treesize reduction 67, result has 16.3 percent of original size [2021-11-02 23:12:31,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 138 treesize of output 125 [2021-11-02 23:12:31,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:12:31,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:12:31,288 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 23:12:31,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 121 [2021-11-02 23:12:32,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:12:32,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:12:32,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:12:32,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:12:32,420 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 23:12:32,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 156 treesize of output 117 [2021-11-02 23:12:32,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:12:32,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:12:32,486 INFO L354 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2021-11-02 23:12:32,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 141 treesize of output 143 [2021-11-02 23:12:32,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:12:32,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:12:32,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:12:32,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:12:32,527 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 23:12:32,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 137 treesize of output 131 [2021-11-02 23:12:33,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:12:33,960 INFO L354 Elim1Store]: treesize reduction 184, result has 14.8 percent of original size [2021-11-02 23:12:33,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 380 treesize of output 205 [2021-11-02 23:12:33,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:12:34,139 INFO L354 Elim1Store]: treesize reduction 124, result has 18.4 percent of original size [2021-11-02 23:12:34,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 241 treesize of output 194 [2021-11-02 23:12:34,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:12:34,315 INFO L354 Elim1Store]: treesize reduction 250, result has 11.3 percent of original size [2021-11-02 23:12:34,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 233 treesize of output 199 [2021-11-02 23:12:40,672 INFO L354 Elim1Store]: treesize reduction 68, result has 23.6 percent of original size [2021-11-02 23:12:40,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 172 treesize of output 178 [2021-11-02 23:12:44,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:12:44,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:12:44,326 INFO L354 Elim1Store]: treesize reduction 212, result has 12.8 percent of original size [2021-11-02 23:12:44,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 225 treesize of output 208 [2021-11-02 23:12:44,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:12:44,473 INFO L354 Elim1Store]: treesize reduction 150, result has 14.3 percent of original size [2021-11-02 23:12:44,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 221 treesize of output 211 [2021-11-02 23:12:44,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:12:44,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:12:44,643 INFO L354 Elim1Store]: treesize reduction 156, result has 12.8 percent of original size [2021-11-02 23:12:44,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 202 treesize of output 174 [2021-11-02 23:12:49,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:12:49,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:12:49,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:12:49,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:12:49,983 INFO L354 Elim1Store]: treesize reduction 256, result has 10.8 percent of original size [2021-11-02 23:12:49,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 251 treesize of output 226 [2021-11-02 23:12:50,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:12:50,128 INFO L354 Elim1Store]: treesize reduction 130, result has 16.1 percent of original size [2021-11-02 23:12:50,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 236 treesize of output 229 [2021-11-02 23:12:50,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:12:50,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:12:50,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:12:50,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:12:50,289 INFO L354 Elim1Store]: treesize reduction 192, result has 10.7 percent of original size [2021-11-02 23:12:50,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 11 case distinctions, treesize of input 232 treesize of output 196 [2021-11-02 23:12:53,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:12:53,738 INFO L354 Elim1Store]: treesize reduction 364, result has 11.2 percent of original size [2021-11-02 23:12:53,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 486 treesize of output 361 [2021-11-02 23:12:53,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:12:54,048 INFO L354 Elim1Store]: treesize reduction 354, result has 12.8 percent of original size [2021-11-02 23:12:54,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 476 treesize of output 313 [2021-11-02 23:12:54,283 INFO L354 Elim1Store]: treesize reduction 524, result has 10.7 percent of original size [2021-11-02 23:12:54,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 466 treesize of output 417 [2021-11-02 23:13:00,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:13:00,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:13:01,247 INFO L354 Elim1Store]: treesize reduction 408, result has 9.9 percent of original size [2021-11-02 23:13:01,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 19 case distinctions, treesize of input 440 treesize of output 354 [2021-11-02 23:13:01,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:13:01,404 INFO L354 Elim1Store]: treesize reduction 554, result has 10.2 percent of original size [2021-11-02 23:13:01,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 699 treesize of output 692 [2021-11-02 23:13:01,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:13:01,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:13:01,674 INFO L354 Elim1Store]: treesize reduction 364, result has 10.1 percent of original size [2021-11-02 23:13:01,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 12 new quantified variables, introduced 19 case distinctions, treesize of input 680 treesize of output 394 [2021-11-02 23:13:02,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:13:02,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:13:03,445 INFO L354 Elim1Store]: treesize reduction 542, result has 9.8 percent of original size [2021-11-02 23:13:03,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 27 case distinctions, treesize of input 689 treesize of output 367 [2021-11-02 23:13:03,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:13:03,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:13:03,897 INFO L354 Elim1Store]: treesize reduction 446, result has 9.9 percent of original size [2021-11-02 23:13:03,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 14 new quantified variables, introduced 27 case distinctions, treesize of input 800 treesize of output 382 [2021-11-02 23:13:03,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:13:04,144 INFO L354 Elim1Store]: treesize reduction 714, result has 13.6 percent of original size [2021-11-02 23:13:04,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 660 treesize of output 653 [2021-11-02 23:13:13,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:13:13,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:13:13,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:13:13,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:13:13,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:13:13,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:13:13,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:13:13,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:13:14,148 INFO L354 Elim1Store]: treesize reduction 430, result has 6.3 percent of original size [2021-11-02 23:13:14,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 31 case distinctions, treesize of input 634 treesize of output 373 [2021-11-02 23:13:14,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:13:14,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:13:14,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:13:14,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:13:14,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:13:14,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:13:14,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:13:14,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:13:14,596 INFO L354 Elim1Store]: treesize reduction 680, result has 7.7 percent of original size [2021-11-02 23:13:14,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 11 new quantified variables, introduced 31 case distinctions, treesize of input 529 treesize of output 299 [2021-11-02 23:13:14,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:13:14,779 INFO L354 Elim1Store]: treesize reduction 336, result has 14.3 percent of original size [2021-11-02 23:13:14,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 395 treesize of output 384 [2021-11-02 23:13:21,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:13:21,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:13:21,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:13:21,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:13:22,164 INFO L354 Elim1Store]: treesize reduction 572, result has 10.5 percent of original size [2021-11-02 23:13:22,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 36 case distinctions, treesize of input 652 treesize of output 385 [2021-11-02 23:13:22,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:13:22,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:13:22,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:13:22,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:13:22,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:13:22,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:13:22,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:13:22,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:13:22,746 INFO L354 Elim1Store]: treesize reduction 574, result has 9.3 percent of original size [2021-11-02 23:13:22,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 5 disjoint index pairs (out of 28 index pairs), introduced 11 new quantified variables, introduced 34 case distinctions, treesize of input 418 treesize of output 260 [2021-11-02 23:13:22,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:13:22,971 INFO L354 Elim1Store]: treesize reduction 353, result has 10.6 percent of original size [2021-11-02 23:13:22,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 363 treesize of output 342 [2021-11-02 23:13:39,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:13:39,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:13:39,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:13:39,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:13:40,551 INFO L354 Elim1Store]: treesize reduction 804, result has 10.0 percent of original size [2021-11-02 23:13:40,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 36 case distinctions, treesize of input 544 treesize of output 333 [2021-11-02 23:13:40,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:13:40,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:13:40,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:13:41,183 INFO L354 Elim1Store]: treesize reduction 644, result has 10.4 percent of original size [2021-11-02 23:13:41,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 13 new quantified variables, introduced 36 case distinctions, treesize of input 428 treesize of output 318 [2021-11-02 23:13:41,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:13:41,416 INFO L354 Elim1Store]: treesize reduction 347, result has 10.8 percent of original size [2021-11-02 23:13:41,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 387 treesize of output 356 [2021-11-02 23:13:42,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:13:42,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:13:42,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:13:42,911 INFO L354 Elim1Store]: treesize reduction 472, result has 2.7 percent of original size [2021-11-02 23:13:42,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 11 new quantified variables, introduced 28 case distinctions, treesize of input 380 treesize of output 217 [2021-11-02 23:13:42,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:13:42,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:13:42,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:13:42,985 INFO L354 Elim1Store]: treesize reduction 288, result has 0.3 percent of original size [2021-11-02 23:13:42,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 190 treesize of output 106 [2021-11-02 23:13:46,193 INFO L354 Elim1Store]: treesize reduction 58, result has 26.6 percent of original size [2021-11-02 23:13:46,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 64 treesize of output 58 [2021-11-02 23:13:46,852 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 10 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:13:46,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461118985] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:46,853 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:13:46,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 78 [2021-11-02 23:13:46,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540304961] [2021-11-02 23:13:46,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2021-11-02 23:13:46,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:46,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-11-02 23:13:46,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=5654, Unknown=9, NotChecked=0, Total=6006 [2021-11-02 23:13:46,855 INFO L87 Difference]: Start difference. First operand 102 states and 107 transitions. Second operand has 78 states, 77 states have (on average 1.5324675324675325) internal successors, (118), 74 states have internal predecessors, (118), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-02 23:15:03,488 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-11-02 23:15:03,490 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 101 [2021-11-02 23:15:03,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-02 23:15:03,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-02 23:15:03,690 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:312) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:158) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:139) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:99) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.pop(WrapperScript.java:153) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.pop(HistoryRecordingScript.java:117) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.pop(ManagedScript.java:128) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.unAssertPostcondition(IncrementalHoareTripleChecker.java:662) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.clearAssertionStack(IncrementalHoareTripleChecker.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.releaseLock(IncrementalHoareTripleChecker.java:281) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ProtectiveHoareTripleChecker.releaseLock(ProtectiveHoareTripleChecker.java:93) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.EfficientHoareTripleChecker.releaseLock(EfficientHoareTripleChecker.java:162) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.releaseLock(CachingHoareTripleChecker.java:201) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.switchToReadonlyMode(AbstractInterpolantAutomaton.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:886) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:783) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) 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) Caused by: java.io.IOException: Broken pipe at java.base/java.io.FileOutputStream.writeBytes(Native Method) at java.base/java.io.FileOutputStream.write(FileOutputStream.java:354) at java.base/java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:81) at java.base/java.io.BufferedOutputStream.flush(BufferedOutputStream.java:142) at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:318) at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:153) at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:251) at java.base/java.io.BufferedWriter.flush(BufferedWriter.java:257) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:156) ... 35 more [2021-11-02 23:15:03,695 INFO L168 Benchmark]: Toolchain (without parser) took 654705.40 ms. Allocated memory was 96.5 MB in the beginning and 474.0 MB in the end (delta: 377.5 MB). Free memory was 53.5 MB in the beginning and 73.4 MB in the end (delta: -19.9 MB). Peak memory consumption was 358.8 MB. Max. memory is 16.1 GB. [2021-11-02 23:15:03,696 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 96.5 MB. Free memory is still 70.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-02 23:15:03,696 INFO L168 Benchmark]: CACSL2BoogieTranslator took 533.80 ms. Allocated memory is still 96.5 MB. Free memory was 53.3 MB in the beginning and 62.2 MB in the end (delta: -9.0 MB). Peak memory consumption was 4.3 MB. Max. memory is 16.1 GB. [2021-11-02 23:15:03,696 INFO L168 Benchmark]: Boogie Preprocessor took 110.03 ms. Allocated memory is still 96.5 MB. Free memory was 62.2 MB in the beginning and 59.3 MB in the end (delta: 2.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-11-02 23:15:03,696 INFO L168 Benchmark]: RCFGBuilder took 806.77 ms. Allocated memory is still 96.5 MB. Free memory was 59.3 MB in the beginning and 35.7 MB in the end (delta: 23.6 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2021-11-02 23:15:03,697 INFO L168 Benchmark]: TraceAbstraction took 653248.91 ms. Allocated memory was 96.5 MB in the beginning and 474.0 MB in the end (delta: 377.5 MB). Free memory was 35.2 MB in the beginning and 73.4 MB in the end (delta: -38.2 MB). Peak memory consumption was 341.9 MB. Max. memory is 16.1 GB. [2021-11-02 23:15:03,698 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 96.5 MB. Free memory is still 70.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 533.80 ms. Allocated memory is still 96.5 MB. Free memory was 53.3 MB in the beginning and 62.2 MB in the end (delta: -9.0 MB). Peak memory consumption was 4.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 110.03 ms. Allocated memory is still 96.5 MB. Free memory was 62.2 MB in the beginning and 59.3 MB in the end (delta: 2.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 806.77 ms. Allocated memory is still 96.5 MB. Free memory was 59.3 MB in the beginning and 35.7 MB in the end (delta: 23.6 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 653248.91 ms. Allocated memory was 96.5 MB in the beginning and 474.0 MB in the end (delta: 377.5 MB). Free memory was 35.2 MB in the beginning and 73.4 MB in the end (delta: -38.2 MB). Peak memory consumption was 341.9 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:312) RESULT: Ultimate could not prove your program: Toolchain returned no result. 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_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext3-properties/dll_circular_traversal-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4fb6aa6206205a747f158782e93b3c9333c1a2cdc4e8dab70046fca960e31961 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 23:15:06,106 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 23:15:06,110 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 23:15:06,168 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 23:15:06,169 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 23:15:06,175 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 23:15:06,177 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 23:15:06,186 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 23:15:06,187 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 23:15:06,188 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 23:15:06,190 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 23:15:06,192 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 23:15:06,192 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 23:15:06,194 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 23:15:06,196 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 23:15:06,198 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 23:15:06,199 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 23:15:06,201 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 23:15:06,222 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 23:15:06,225 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 23:15:06,227 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 23:15:06,233 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 23:15:06,234 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 23:15:06,237 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 23:15:06,242 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 23:15:06,244 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 23:15:06,244 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 23:15:06,247 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 23:15:06,248 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 23:15:06,249 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 23:15:06,250 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 23:15:06,251 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 23:15:06,254 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 23:15:06,255 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 23:15:06,257 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 23:15:06,258 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 23:15:06,259 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 23:15:06,259 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 23:15:06,259 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 23:15:06,262 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 23:15:06,263 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 23:15:06,264 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-11-02 23:15:06,313 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 23:15:06,313 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 23:15:06,314 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 23:15:06,315 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 23:15:06,317 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 23:15:06,317 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 23:15:06,318 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 23:15:06,318 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 23:15:06,318 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 23:15:06,318 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-02 23:15:06,320 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 23:15:06,320 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 23:15:06,320 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 23:15:06,320 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-02 23:15:06,321 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-02 23:15:06,321 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-02 23:15:06,321 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 23:15:06,321 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-02 23:15:06,322 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-02 23:15:06,322 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-02 23:15:06,322 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 23:15:06,322 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 23:15:06,323 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 23:15:06,323 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 23:15:06,323 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 23:15:06,323 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 23:15:06,324 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 23:15:06,324 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 23:15:06,324 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-02 23:15:06,324 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-02 23:15:06,325 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 23:15:06,325 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-02 23:15:06,325 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_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4fb6aa6206205a747f158782e93b3c9333c1a2cdc4e8dab70046fca960e31961 [2021-11-02 23:15:06,778 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 23:15:06,804 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 23:15:06,808 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 23:15:06,810 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 23:15:06,811 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 23:15:06,812 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/list-ext3-properties/dll_circular_traversal-2.i [2021-11-02 23:15:06,894 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/data/028dad4dc/6d0f14ad3aad4affbbd6ea96f3a1c92b/FLAGb660aba69 [2021-11-02 23:15:07,679 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 23:15:07,680 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/sv-benchmarks/c/list-ext3-properties/dll_circular_traversal-2.i [2021-11-02 23:15:07,696 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/data/028dad4dc/6d0f14ad3aad4affbbd6ea96f3a1c92b/FLAGb660aba69 [2021-11-02 23:15:07,890 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/data/028dad4dc/6d0f14ad3aad4affbbd6ea96f3a1c92b [2021-11-02 23:15:07,893 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 23:15:07,895 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-02 23:15:07,896 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 23:15:07,896 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 23:15:07,902 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 23:15:07,903 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:15:07" (1/1) ... [2021-11-02 23:15:07,904 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d863091 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:15:07, skipping insertion in model container [2021-11-02 23:15:07,907 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:15:07" (1/1) ... [2021-11-02 23:15:07,920 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 23:15:07,990 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 23:15:08,499 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/sv-benchmarks/c/list-ext3-properties/dll_circular_traversal-2.i[24211,24224] [2021-11-02 23:15:08,514 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 23:15:08,551 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 23:15:08,615 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/sv-benchmarks/c/list-ext3-properties/dll_circular_traversal-2.i[24211,24224] [2021-11-02 23:15:08,626 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 23:15:08,678 INFO L208 MainTranslator]: Completed translation [2021-11-02 23:15:08,679 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:15:08 WrapperNode [2021-11-02 23:15:08,680 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 23:15:08,681 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 23:15:08,682 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 23:15:08,682 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 23:15:08,697 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:15:08" (1/1) ... [2021-11-02 23:15:08,697 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:15:08" (1/1) ... [2021-11-02 23:15:08,743 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:15:08" (1/1) ... [2021-11-02 23:15:08,744 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:15:08" (1/1) ... [2021-11-02 23:15:08,783 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:15:08" (1/1) ... [2021-11-02 23:15:08,791 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:15:08" (1/1) ... [2021-11-02 23:15:08,806 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:15:08" (1/1) ... [2021-11-02 23:15:08,816 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 23:15:08,832 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 23:15:08,832 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 23:15:08,832 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 23:15:08,833 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:15:08" (1/1) ... [2021-11-02 23:15:08,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 23:15:08,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:15:08,866 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 23:15:08,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 23:15:08,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-02 23:15:08,908 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 23:15:08,908 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2021-11-02 23:15:08,908 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-11-02 23:15:08,908 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-11-02 23:15:08,908 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-11-02 23:15:08,909 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-11-02 23:15:08,909 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_circular_create [2021-11-02 23:15:08,909 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-02 23:15:08,909 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-02 23:15:08,909 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-11-02 23:15:08,910 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-11-02 23:15:08,910 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-11-02 23:15:08,910 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-11-02 23:15:08,910 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 23:15:08,910 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-11-02 23:15:08,910 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-11-02 23:15:08,911 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-02 23:15:08,911 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-02 23:15:08,911 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-02 23:15:08,911 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-02 23:15:08,911 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-02 23:15:08,912 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-02 23:15:08,912 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-02 23:15:08,912 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-02 23:15:08,912 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-02 23:15:08,912 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-02 23:15:08,913 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-02 23:15:08,913 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-02 23:15:08,913 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-02 23:15:08,913 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-02 23:15:08,913 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-02 23:15:08,913 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-02 23:15:08,914 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-02 23:15:08,914 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-02 23:15:08,914 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-02 23:15:08,914 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-02 23:15:08,914 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-02 23:15:08,915 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-02 23:15:08,915 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-02 23:15:08,915 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-02 23:15:08,915 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-02 23:15:08,915 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-02 23:15:08,916 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-02 23:15:08,916 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-02 23:15:08,916 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-02 23:15:08,916 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-02 23:15:08,916 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-02 23:15:08,917 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-02 23:15:08,917 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-02 23:15:08,917 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-02 23:15:08,917 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-02 23:15:08,917 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-02 23:15:08,918 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-02 23:15:08,918 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-02 23:15:08,918 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-02 23:15:08,918 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-02 23:15:08,918 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-02 23:15:08,919 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-02 23:15:08,919 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-02 23:15:08,919 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-02 23:15:08,919 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-02 23:15:08,919 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-02 23:15:08,920 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-02 23:15:08,920 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-02 23:15:08,920 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-02 23:15:08,920 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-02 23:15:08,920 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-02 23:15:08,921 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-02 23:15:08,921 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-02 23:15:08,921 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-02 23:15:08,921 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-11-02 23:15:08,921 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-02 23:15:08,922 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-02 23:15:08,922 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-02 23:15:08,922 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-02 23:15:08,922 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-02 23:15:08,922 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-02 23:15:08,923 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-02 23:15:08,923 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-02 23:15:08,923 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-02 23:15:08,923 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-02 23:15:08,923 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-02 23:15:08,923 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-02 23:15:08,924 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-02 23:15:08,924 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-02 23:15:08,924 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-02 23:15:08,924 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-02 23:15:08,924 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-02 23:15:08,925 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-02 23:15:08,925 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-02 23:15:08,925 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-02 23:15:08,925 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-02 23:15:08,925 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-02 23:15:08,926 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-02 23:15:08,926 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-02 23:15:08,926 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-02 23:15:08,926 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-02 23:15:08,926 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-02 23:15:08,927 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-02 23:15:08,927 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-02 23:15:08,927 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-02 23:15:08,928 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-02 23:15:08,928 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-02 23:15:08,928 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-02 23:15:08,928 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-02 23:15:08,928 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-02 23:15:08,929 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-02 23:15:08,929 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-02 23:15:08,929 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-02 23:15:08,929 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-02 23:15:08,929 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-02 23:15:08,929 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-02 23:15:08,930 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-02 23:15:08,930 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-02 23:15:08,930 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-02 23:15:08,930 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-02 23:15:08,930 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-02 23:15:08,931 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-02 23:15:08,931 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-11-02 23:15:08,931 INFO L130 BoogieDeclarations]: Found specification of procedure dll_circular_create [2021-11-02 23:15:08,931 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-02 23:15:08,931 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-02 23:15:08,932 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-02 23:15:08,932 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-02 23:15:08,932 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-02 23:15:08,936 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-02 23:15:08,937 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-02 23:15:08,937 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-02 23:15:08,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-02 23:15:08,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 23:15:08,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2021-11-02 23:15:08,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-02 23:15:08,941 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-02 23:15:09,666 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-11-02 23:15:09,859 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 23:15:09,859 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-02 23:15:09,861 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:15:09 BoogieIcfgContainer [2021-11-02 23:15:09,862 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 23:15:09,864 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 23:15:09,864 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 23:15:09,867 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 23:15:09,868 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 11:15:07" (1/3) ... [2021-11-02 23:15:09,868 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@590772d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:15:09, skipping insertion in model container [2021-11-02 23:15:09,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:15:08" (2/3) ... [2021-11-02 23:15:09,869 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@590772d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:15:09, skipping insertion in model container [2021-11-02 23:15:09,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:15:09" (3/3) ... [2021-11-02 23:15:09,871 INFO L111 eAbstractionObserver]: Analyzing ICFG dll_circular_traversal-2.i [2021-11-02 23:15:09,877 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 23:15:09,877 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 35 error locations. [2021-11-02 23:15:09,925 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 23:15:09,932 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 [2021-11-02 23:15:09,933 INFO L340 AbstractCegarLoop]: Starting to check reachability of 35 error locations. [2021-11-02 23:15:09,949 INFO L276 IsEmpty]: Start isEmpty. Operand has 89 states, 45 states have (on average 2.0) internal successors, (90), 81 states have internal predecessors, (90), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-02 23:15:09,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-02 23:15:09,967 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:15:09,968 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:15:09,969 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting dll_circular_createErr0REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 32 more)] === [2021-11-02 23:15:09,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:15:09,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1362646406, now seen corresponding path program 1 times [2021-11-02 23:15:09,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:15:09,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1037976053] [2021-11-02 23:15:09,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:15:09,997 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:15:09,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:15:10,000 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:15:10,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-02 23:15:10,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:15:10,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-02 23:15:10,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:15:10,368 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 [2021-11-02 23:15:10,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:15:10,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:15:10,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:15:10,484 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:15:10,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1037976053] [2021-11-02 23:15:10,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1037976053] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 23:15:10,485 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:15:10,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-02 23:15:10,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559645147] [2021-11-02 23:15:10,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:15:10,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:15:10,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:15:10,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:15:10,520 INFO L87 Difference]: Start difference. First operand has 89 states, 45 states have (on average 2.0) internal successors, (90), 81 states have internal predecessors, (90), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 23:15:10,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:15:10,780 INFO L93 Difference]: Finished difference Result 85 states and 90 transitions. [2021-11-02 23:15:10,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:15:10,782 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-11-02 23:15:10,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:15:10,792 INFO L225 Difference]: With dead ends: 85 [2021-11-02 23:15:10,793 INFO L226 Difference]: Without dead ends: 78 [2021-11-02 23:15:10,794 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:15:10,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-02 23:15:10,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-11-02 23:15:10,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 72 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-02 23:15:10,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 81 transitions. [2021-11-02 23:15:10,853 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 81 transitions. Word has length 10 [2021-11-02 23:15:10,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:15:10,854 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 81 transitions. [2021-11-02 23:15:10,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 23:15:10,857 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 81 transitions. [2021-11-02 23:15:10,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-02 23:15:10,858 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:15:10,858 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:15:10,871 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-02 23:15:11,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:15:11,072 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting dll_circular_createErr1REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 32 more)] === [2021-11-02 23:15:11,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:15:11,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1362646405, now seen corresponding path program 1 times [2021-11-02 23:15:11,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:15:11,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1779168576] [2021-11-02 23:15:11,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:15:11,076 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:15:11,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:15:11,077 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:15:11,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-02 23:15:11,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:15:11,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 23:15:11,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:15:11,292 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 [2021-11-02 23:15:11,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:15:11,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:15:11,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:15:11,465 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:15:11,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1779168576] [2021-11-02 23:15:11,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1779168576] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 23:15:11,467 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:15:11,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-02 23:15:11,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806249606] [2021-11-02 23:15:11,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:15:11,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:15:11,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:15:11,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:15:11,474 INFO L87 Difference]: Start difference. First operand 78 states and 81 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 23:15:11,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:15:11,767 INFO L93 Difference]: Finished difference Result 74 states and 77 transitions. [2021-11-02 23:15:11,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:15:11,769 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-11-02 23:15:11,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:15:11,771 INFO L225 Difference]: With dead ends: 74 [2021-11-02 23:15:11,771 INFO L226 Difference]: Without dead ends: 74 [2021-11-02 23:15:11,771 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:15:11,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-02 23:15:11,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-11-02 23:15:11,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 42 states have (on average 1.7142857142857142) internal successors, (72), 68 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-02 23:15:11,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2021-11-02 23:15:11,780 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 10 [2021-11-02 23:15:11,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:15:11,780 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2021-11-02 23:15:11,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 23:15:11,781 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2021-11-02 23:15:11,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-02 23:15:11,782 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:15:11,782 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:15:11,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-02 23:15:11,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:15:11,994 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting dll_circular_createErr14REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 32 more)] === [2021-11-02 23:15:11,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:15:11,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1751625927, now seen corresponding path program 1 times [2021-11-02 23:15:11,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:15:11,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1808740447] [2021-11-02 23:15:11,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:15:11,996 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:15:11,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:15:11,999 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:15:12,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-02 23:15:12,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:15:12,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 23:15:12,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:15:12,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:15:12,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:15:12,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:15:12,381 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:15:12,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1808740447] [2021-11-02 23:15:12,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1808740447] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 23:15:12,381 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:15:12,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-02 23:15:12,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897384962] [2021-11-02 23:15:12,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 23:15:12,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:15:12,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 23:15:12,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-02 23:15:12,393 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand has 8 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 23:15:12,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:15:12,473 INFO L93 Difference]: Finished difference Result 87 states and 90 transitions. [2021-11-02 23:15:12,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 23:15:12,480 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-11-02 23:15:12,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:15:12,481 INFO L225 Difference]: With dead ends: 87 [2021-11-02 23:15:12,481 INFO L226 Difference]: Without dead ends: 87 [2021-11-02 23:15:12,483 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-02 23:15:12,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-02 23:15:12,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 81. [2021-11-02 23:15:12,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 49 states have (on average 1.7346938775510203) internal successors, (85), 75 states have internal predecessors, (85), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-02 23:15:12,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2021-11-02 23:15:12,494 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 16 [2021-11-02 23:15:12,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:15:12,494 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2021-11-02 23:15:12,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 23:15:12,495 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2021-11-02 23:15:12,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-02 23:15:12,495 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:15:12,496 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:15:12,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-02 23:15:12,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:15:12,709 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting dll_circular_createErr6REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 32 more)] === [2021-11-02 23:15:12,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:15:12,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1751627368, now seen corresponding path program 1 times [2021-11-02 23:15:12,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:15:12,710 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1236251958] [2021-11-02 23:15:12,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:15:12,710 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:15:12,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:15:12,711 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:15:12,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-02 23:15:12,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:15:12,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-02 23:15:12,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:15:12,919 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 [2021-11-02 23:15:12,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:15:12,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:15:12,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:15:12,974 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:15:12,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1236251958] [2021-11-02 23:15:12,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1236251958] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 23:15:12,975 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:15:12,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-02 23:15:12,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600715042] [2021-11-02 23:15:12,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:15:12,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:15:12,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:15:12,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:15:12,977 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 23:15:13,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:15:13,146 INFO L93 Difference]: Finished difference Result 79 states and 86 transitions. [2021-11-02 23:15:13,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:15:13,147 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-11-02 23:15:13,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:15:13,148 INFO L225 Difference]: With dead ends: 79 [2021-11-02 23:15:13,148 INFO L226 Difference]: Without dead ends: 79 [2021-11-02 23:15:13,149 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:15:13,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-02 23:15:13,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-11-02 23:15:13,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 49 states have (on average 1.653061224489796) internal successors, (81), 73 states have internal predecessors, (81), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-02 23:15:13,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 86 transitions. [2021-11-02 23:15:13,161 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 86 transitions. Word has length 16 [2021-11-02 23:15:13,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:15:13,161 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 86 transitions. [2021-11-02 23:15:13,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 23:15:13,161 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 86 transitions. [2021-11-02 23:15:13,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-02 23:15:13,162 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:15:13,162 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:15:13,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-02 23:15:13,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:15:13,363 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting dll_circular_createErr7REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 32 more)] === [2021-11-02 23:15:13,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:15:13,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1751627369, now seen corresponding path program 1 times [2021-11-02 23:15:13,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:15:13,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1281986869] [2021-11-02 23:15:13,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:15:13,364 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:15:13,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:15:13,365 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:15:13,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-02 23:15:13,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:15:13,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 23:15:13,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:15:13,600 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 [2021-11-02 23:15:13,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:15:13,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:15:13,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:15:13,742 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:15:13,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1281986869] [2021-11-02 23:15:13,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1281986869] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 23:15:13,743 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:15:13,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-02 23:15:13,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503469230] [2021-11-02 23:15:13,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:15:13,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:15:13,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:15:13,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:15:13,745 INFO L87 Difference]: Start difference. First operand 79 states and 86 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 23:15:14,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:15:14,064 INFO L93 Difference]: Finished difference Result 77 states and 82 transitions. [2021-11-02 23:15:14,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:15:14,065 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-11-02 23:15:14,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:15:14,066 INFO L225 Difference]: With dead ends: 77 [2021-11-02 23:15:14,066 INFO L226 Difference]: Without dead ends: 77 [2021-11-02 23:15:14,067 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:15:14,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-02 23:15:14,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-11-02 23:15:14,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 49 states have (on average 1.5714285714285714) internal successors, (77), 71 states have internal predecessors, (77), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-02 23:15:14,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 82 transitions. [2021-11-02 23:15:14,074 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 82 transitions. Word has length 16 [2021-11-02 23:15:14,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:15:14,074 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 82 transitions. [2021-11-02 23:15:14,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 23:15:14,074 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 82 transitions. [2021-11-02 23:15:14,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-02 23:15:14,075 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:15:14,075 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:15:14,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-02 23:15:14,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:15:14,292 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting dll_circular_createErr10REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 32 more)] === [2021-11-02 23:15:14,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:15:14,293 INFO L85 PathProgramCache]: Analyzing trace with hash -313278229, now seen corresponding path program 1 times [2021-11-02 23:15:14,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:15:14,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1211137635] [2021-11-02 23:15:14,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:15:14,294 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:15:14,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:15:14,295 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:15:14,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-02 23:15:14,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:15:14,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 23:15:14,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:15:14,537 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 [2021-11-02 23:15:14,605 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-02 23:15:14,605 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 17 treesize of output 22 [2021-11-02 23:15:14,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:15:14,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:15:14,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:15:14,760 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:15:14,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1211137635] [2021-11-02 23:15:14,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1211137635] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 23:15:14,761 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:15:14,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-02 23:15:14,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912121595] [2021-11-02 23:15:14,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:15:14,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:15:14,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:15:14,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:15:14,763 INFO L87 Difference]: Start difference. First operand 77 states and 82 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 23:15:15,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:15:15,052 INFO L93 Difference]: Finished difference Result 78 states and 81 transitions. [2021-11-02 23:15:15,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:15:15,052 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-11-02 23:15:15,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:15:15,053 INFO L225 Difference]: With dead ends: 78 [2021-11-02 23:15:15,053 INFO L226 Difference]: Without dead ends: 78 [2021-11-02 23:15:15,054 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:15:15,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-02 23:15:15,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2021-11-02 23:15:15,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 49 states have (on average 1.5510204081632653) internal successors, (76), 71 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-02 23:15:15,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2021-11-02 23:15:15,060 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 18 [2021-11-02 23:15:15,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:15:15,061 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2021-11-02 23:15:15,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 23:15:15,061 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2021-11-02 23:15:15,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-02 23:15:15,062 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:15:15,062 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:15:15,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-02 23:15:15,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:15:15,275 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting dll_circular_createErr11REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 32 more)] === [2021-11-02 23:15:15,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:15:15,276 INFO L85 PathProgramCache]: Analyzing trace with hash -313278228, now seen corresponding path program 1 times [2021-11-02 23:15:15,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:15:15,276 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1058482947] [2021-11-02 23:15:15,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:15:15,277 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:15:15,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:15:15,278 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:15:15,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-02 23:15:15,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:15:15,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-02 23:15:15,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:15:15,548 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 [2021-11-02 23:15:15,659 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-02 23:15:15,659 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 [2021-11-02 23:15:15,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:15:15,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:15:16,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:15:16,197 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:15:16,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1058482947] [2021-11-02 23:15:16,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1058482947] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 23:15:16,197 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:15:16,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [] total 6 [2021-11-02 23:15:16,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625382212] [2021-11-02 23:15:16,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 23:15:16,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:15:16,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 23:15:16,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-02 23:15:16,199 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 23:15:16,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:15:16,711 INFO L93 Difference]: Finished difference Result 77 states and 80 transitions. [2021-11-02 23:15:16,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 23:15:16,713 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-11-02 23:15:16,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:15:16,714 INFO L225 Difference]: With dead ends: 77 [2021-11-02 23:15:16,714 INFO L226 Difference]: Without dead ends: 77 [2021-11-02 23:15:16,715 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-02 23:15:16,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-02 23:15:16,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-11-02 23:15:16,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 49 states have (on average 1.530612244897959) internal successors, (75), 71 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-02 23:15:16,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2021-11-02 23:15:16,722 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 18 [2021-11-02 23:15:16,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:15:16,722 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2021-11-02 23:15:16,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 23:15:16,723 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2021-11-02 23:15:16,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-02 23:15:16,724 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:15:16,724 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:15:16,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-02 23:15:16,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:15:16,929 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting dll_circular_createErr10REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 32 more)] === [2021-11-02 23:15:16,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:15:16,929 INFO L85 PathProgramCache]: Analyzing trace with hash -403271105, now seen corresponding path program 1 times [2021-11-02 23:15:16,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:15:16,930 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [296173772] [2021-11-02 23:15:16,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:15:16,933 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:15:16,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:15:16,933 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:15:16,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-02 23:15:17,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:15:17,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 23:15:17,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:15:17,240 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 [2021-11-02 23:15:17,319 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-02 23:15:17,320 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 17 treesize of output 22 [2021-11-02 23:15:17,368 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:15:17,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:15:17,469 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:15:17,469 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:15:17,469 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [296173772] [2021-11-02 23:15:17,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [296173772] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 23:15:17,469 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:15:17,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-11-02 23:15:17,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924905214] [2021-11-02 23:15:17,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:15:17,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:15:17,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:15:17,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:15:17,471 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 23:15:17,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:15:17,694 INFO L93 Difference]: Finished difference Result 75 states and 78 transitions. [2021-11-02 23:15:17,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:15:17,695 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-11-02 23:15:17,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:15:17,696 INFO L225 Difference]: With dead ends: 75 [2021-11-02 23:15:17,696 INFO L226 Difference]: Without dead ends: 75 [2021-11-02 23:15:17,697 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:15:17,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-02 23:15:17,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-11-02 23:15:17,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 49 states have (on average 1.489795918367347) internal successors, (73), 69 states have internal predecessors, (73), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-02 23:15:17,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2021-11-02 23:15:17,702 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 24 [2021-11-02 23:15:17,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:15:17,702 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2021-11-02 23:15:17,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 23:15:17,703 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2021-11-02 23:15:17,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-02 23:15:17,704 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:15:17,704 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:15:17,725 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-02 23:15:17,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:15:17,929 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting dll_circular_createErr11REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 32 more)] === [2021-11-02 23:15:17,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:15:17,929 INFO L85 PathProgramCache]: Analyzing trace with hash -403271104, now seen corresponding path program 1 times [2021-11-02 23:15:17,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:15:17,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1066249831] [2021-11-02 23:15:17,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:15:17,930 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:15:17,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:15:17,930 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:15:17,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-02 23:15:18,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:15:18,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-02 23:15:18,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:15:18,282 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 [2021-11-02 23:15:18,289 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 [2021-11-02 23:15:18,450 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-02 23:15:18,451 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 29 treesize of output 31 [2021-11-02 23:15:18,472 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 23:15:18,472 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 28 treesize of output 28 [2021-11-02 23:15:18,620 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:15:18,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:15:21,653 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:15:21,653 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:15:21,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1066249831] [2021-11-02 23:15:21,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1066249831] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 23:15:21,653 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:15:21,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-11-02 23:15:21,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465906398] [2021-11-02 23:15:21,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 23:15:21,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:15:21,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 23:15:21,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=37, Unknown=1, NotChecked=0, Total=56 [2021-11-02 23:15:21,655 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 8 states have internal predecessors, (31), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 23:15:26,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:15:26,877 INFO L93 Difference]: Finished difference Result 73 states and 76 transitions. [2021-11-02 23:15:26,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 23:15:26,878 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 8 states have internal predecessors, (31), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-11-02 23:15:26,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:15:26,879 INFO L225 Difference]: With dead ends: 73 [2021-11-02 23:15:26,879 INFO L226 Difference]: Without dead ends: 73 [2021-11-02 23:15:26,880 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=42, Invalid=67, Unknown=1, NotChecked=0, Total=110 [2021-11-02 23:15:26,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-02 23:15:26,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-11-02 23:15:26,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 49 states have (on average 1.4489795918367347) internal successors, (71), 67 states have internal predecessors, (71), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-02 23:15:26,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2021-11-02 23:15:26,893 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 24 [2021-11-02 23:15:26,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:15:26,893 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2021-11-02 23:15:26,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 8 states have internal predecessors, (31), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 23:15:26,902 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2021-11-02 23:15:26,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-02 23:15:26,903 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:15:26,903 INFO L513 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] [2021-11-02 23:15:26,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-02 23:15:27,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:15:27,118 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 32 more)] === [2021-11-02 23:15:27,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:15:27,118 INFO L85 PathProgramCache]: Analyzing trace with hash 768142535, now seen corresponding path program 1 times [2021-11-02 23:15:27,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:15:27,119 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [77851173] [2021-11-02 23:15:27,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:15:27,119 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:15:27,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:15:27,121 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:15:27,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-02 23:15:27,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:15:27,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-02 23:15:27,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:15:27,694 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:15:27,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:15:28,373 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:15:28,373 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:15:28,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [77851173] [2021-11-02 23:15:28,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [77851173] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 23:15:28,374 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:15:28,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-11-02 23:15:28,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668978518] [2021-11-02 23:15:28,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-02 23:15:28,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:15:28,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-02 23:15:28,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-11-02 23:15:28,376 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand has 11 states, 9 states have (on average 5.333333333333333) internal successors, (48), 11 states have internal predecessors, (48), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-02 23:15:28,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:15:28,680 INFO L93 Difference]: Finished difference Result 89 states and 92 transitions. [2021-11-02 23:15:28,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 23:15:28,681 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 5.333333333333333) internal successors, (48), 11 states have internal predecessors, (48), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 33 [2021-11-02 23:15:28,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:15:28,683 INFO L225 Difference]: With dead ends: 89 [2021-11-02 23:15:28,683 INFO L226 Difference]: Without dead ends: 84 [2021-11-02 23:15:28,683 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-11-02 23:15:28,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-02 23:15:28,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 79. [2021-11-02 23:15:28,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 55 states have (on average 1.4) internal successors, (77), 73 states have internal predecessors, (77), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-02 23:15:28,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2021-11-02 23:15:28,689 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 33 [2021-11-02 23:15:28,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:15:28,689 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2021-11-02 23:15:28,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 5.333333333333333) internal successors, (48), 11 states have internal predecessors, (48), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-02 23:15:28,690 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2021-11-02 23:15:28,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-02 23:15:28,691 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:15:28,691 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:15:28,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-02 23:15:28,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:15:28,914 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 32 more)] === [2021-11-02 23:15:28,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:15:28,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1961281779, now seen corresponding path program 2 times [2021-11-02 23:15:28,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:15:28,915 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [869197903] [2021-11-02 23:15:28,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:15:28,915 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:15:28,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:15:28,916 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:15:28,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-02 23:15:29,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-02 23:15:29,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:15:29,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-02 23:15:29,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:15:29,326 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-02 23:15:29,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:15:29,548 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-02 23:15:29,548 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:15:29,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [869197903] [2021-11-02 23:15:29,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [869197903] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 23:15:29,548 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:15:29,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-02 23:15:29,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875588582] [2021-11-02 23:15:29,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 23:15:29,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:15:29,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 23:15:29,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-02 23:15:29,550 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-02 23:15:30,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:15:30,151 INFO L93 Difference]: Finished difference Result 77 states and 80 transitions. [2021-11-02 23:15:30,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 23:15:30,152 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 39 [2021-11-02 23:15:30,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:15:30,153 INFO L225 Difference]: With dead ends: 77 [2021-11-02 23:15:30,153 INFO L226 Difference]: Without dead ends: 77 [2021-11-02 23:15:30,157 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 69 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-02 23:15:30,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-02 23:15:30,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2021-11-02 23:15:30,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 56 states have (on average 1.3392857142857142) internal successors, (75), 70 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-02 23:15:30,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2021-11-02 23:15:30,164 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 39 [2021-11-02 23:15:30,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:15:30,166 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2021-11-02 23:15:30,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-02 23:15:30,166 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2021-11-02 23:15:30,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-02 23:15:30,173 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:15:30,173 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:15:30,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-02 23:15:30,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:15:30,374 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr1REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 32 more)] === [2021-11-02 23:15:30,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:15:30,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1961281780, now seen corresponding path program 1 times [2021-11-02 23:15:30,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:15:30,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [755007274] [2021-11-02 23:15:30,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:15:30,375 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:15:30,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:15:30,376 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:15:30,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-02 23:15:30,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:15:30,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-02 23:15:30,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:15:31,069 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:15:31,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:15:32,010 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:15:32,011 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:15:32,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [755007274] [2021-11-02 23:15:32,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [755007274] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 23:15:32,011 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:15:32,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-11-02 23:15:32,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082191164] [2021-11-02 23:15:32,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-02 23:15:32,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:15:32,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-02 23:15:32,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-11-02 23:15:32,017 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand has 13 states, 11 states have (on average 5.454545454545454) internal successors, (60), 13 states have internal predecessors, (60), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-02 23:15:32,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:15:32,481 INFO L93 Difference]: Finished difference Result 92 states and 96 transitions. [2021-11-02 23:15:32,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 23:15:32,482 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 5.454545454545454) internal successors, (60), 13 states have internal predecessors, (60), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 39 [2021-11-02 23:15:32,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:15:32,483 INFO L225 Difference]: With dead ends: 92 [2021-11-02 23:15:32,483 INFO L226 Difference]: Without dead ends: 87 [2021-11-02 23:15:32,483 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-11-02 23:15:32,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-02 23:15:32,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 82. [2021-11-02 23:15:32,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 62 states have (on average 1.3064516129032258) internal successors, (81), 76 states have internal predecessors, (81), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-02 23:15:32,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2021-11-02 23:15:32,487 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 39 [2021-11-02 23:15:32,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:15:32,487 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2021-11-02 23:15:32,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 5.454545454545454) internal successors, (60), 13 states have internal predecessors, (60), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-02 23:15:32,488 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2021-11-02 23:15:32,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-02 23:15:32,489 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:15:32,489 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:15:32,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-02 23:15:32,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:15:32,704 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr1REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 32 more)] === [2021-11-02 23:15:32,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:15:32,704 INFO L85 PathProgramCache]: Analyzing trace with hash 616682528, now seen corresponding path program 2 times [2021-11-02 23:15:32,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:15:32,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [549011426] [2021-11-02 23:15:32,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:15:32,705 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:15:32,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:15:32,706 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:15:32,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-02 23:15:33,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:15:33,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:15:33,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-02 23:15:33,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:15:33,465 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-02 23:15:33,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:15:33,987 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 22 treesize of output 18 [2021-11-02 23:15:34,360 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-02 23:15:34,360 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:15:34,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [549011426] [2021-11-02 23:15:34,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [549011426] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 23:15:34,361 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:15:34,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 13 [2021-11-02 23:15:34,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895683026] [2021-11-02 23:15:34,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-02 23:15:34,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:15:34,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-02 23:15:34,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-11-02 23:15:34,363 INFO L87 Difference]: Start difference. First operand 82 states and 86 transitions. Second operand has 14 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-02 23:15:36,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:15:36,312 INFO L93 Difference]: Finished difference Result 87 states and 90 transitions. [2021-11-02 23:15:36,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 23:15:36,313 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2021-11-02 23:15:36,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:15:36,314 INFO L225 Difference]: With dead ends: 87 [2021-11-02 23:15:36,314 INFO L226 Difference]: Without dead ends: 87 [2021-11-02 23:15:36,314 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-11-02 23:15:36,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-02 23:15:36,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 84. [2021-11-02 23:15:36,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 65 states have (on average 1.2769230769230768) internal successors, (83), 78 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-02 23:15:36,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2021-11-02 23:15:36,319 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 45 [2021-11-02 23:15:36,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:15:36,319 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2021-11-02 23:15:36,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-02 23:15:36,320 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2021-11-02 23:15:36,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-02 23:15:36,321 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:15:36,321 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:15:36,335 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-02 23:15:36,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:15:36,529 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr17ASSERT_VIOLATIONMEMORY_LEAK === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 32 more)] === [2021-11-02 23:15:36,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:15:36,529 INFO L85 PathProgramCache]: Analyzing trace with hash -73575975, now seen corresponding path program 1 times [2021-11-02 23:15:36,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:15:36,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [587722109] [2021-11-02 23:15:36,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:15:36,530 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:15:36,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:15:36,533 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:15:36,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-02 23:15:37,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:15:37,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-02 23:15:37,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:15:37,284 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 [2021-11-02 23:15:37,518 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-02 23:15:37,518 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 15 treesize of output 20 [2021-11-02 23:15:37,826 INFO L354 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2021-11-02 23:15:37,827 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 3 case distinctions, treesize of input 34 treesize of output 45 [2021-11-02 23:15:38,378 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-02 23:15:38,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 36 [2021-11-02 23:15:38,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 [2021-11-02 23:15:38,600 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-11-02 23:15:38,601 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 1 case distinctions, treesize of input 31 treesize of output 15 [2021-11-02 23:15:38,780 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-11-02 23:15:38,781 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 31 treesize of output 15 [2021-11-02 23:15:38,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:15:38,854 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 27 treesize of output 11 [2021-11-02 23:15:39,075 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 [2021-11-02 23:15:39,145 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 23:15:39,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:15:41,851 INFO L354 Elim1Store]: treesize reduction 43, result has 2.3 percent of original size [2021-11-02 23:15:41,851 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 1 case distinctions, treesize of input 113 treesize of output 1 [2021-11-02 23:16:17,824 WARN L838 $PredicateComparison]: unable to prove that (forall ((dll_circular_create_~last~0.offset (_ BitVec 32)) (v_DerPreprocessor_3 (_ BitVec 32)) (dll_circular_create_~head~0.offset (_ BitVec 32)) (v_DerPreprocessor_2 (_ BitVec 32))) (= |c_dll_circular_create_#in~data| (select (select (let ((.cse0 (store |c_#memory_int| c_dll_circular_create_~head~0.base (store (select |c_#memory_int| c_dll_circular_create_~head~0.base) (bvadd dll_circular_create_~head~0.offset (_ bv8 32)) v_DerPreprocessor_3)))) (store .cse0 c_dll_circular_create_~last~0.base (store (select .cse0 c_dll_circular_create_~last~0.base) (bvadd (_ bv4 32) dll_circular_create_~last~0.offset) v_DerPreprocessor_2))) c_dll_circular_create_~new_head~0.base) c_dll_circular_create_~new_head~0.offset))) is different from false [2021-11-02 23:16:38,167 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-02 23:16:38,167 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 49 treesize of output 48 [2021-11-02 23:16:38,264 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 28 refuted. 1 times theorem prover too weak. 0 trivial. 3 not checked. [2021-11-02 23:16:38,265 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:16:38,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [587722109] [2021-11-02 23:16:38,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [587722109] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 23:16:38,265 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:16:38,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 35 [2021-11-02 23:16:38,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183503086] [2021-11-02 23:16:38,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-02 23:16:38,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:16:38,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-02 23:16:38,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=971, Unknown=19, NotChecked=64, Total=1190 [2021-11-02 23:16:38,267 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand has 35 states, 34 states have (on average 2.176470588235294) internal successors, (74), 33 states have internal predecessors, (74), 2 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-02 23:16:43,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:16:43,012 INFO L93 Difference]: Finished difference Result 84 states and 87 transitions. [2021-11-02 23:16:43,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-02 23:16:43,013 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.176470588235294) internal successors, (74), 33 states have internal predecessors, (74), 2 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2021-11-02 23:16:43,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:16:43,014 INFO L225 Difference]: With dead ends: 84 [2021-11-02 23:16:43,014 INFO L226 Difference]: Without dead ends: 84 [2021-11-02 23:16:43,016 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 59 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 58.0s TimeCoverageRelationStatistics Valid=285, Invalid=1422, Unknown=19, NotChecked=80, Total=1806 [2021-11-02 23:16:43,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-02 23:16:43,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-11-02 23:16:43,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 65 states have (on average 1.2615384615384615) internal successors, (82), 78 states have internal predecessors, (82), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-02 23:16:43,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 87 transitions. [2021-11-02 23:16:43,021 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 87 transitions. Word has length 47 [2021-11-02 23:16:43,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:16:43,021 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 87 transitions. [2021-11-02 23:16:43,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.176470588235294) internal successors, (74), 33 states have internal predecessors, (74), 2 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-02 23:16:43,022 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 87 transitions. [2021-11-02 23:16:43,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-02 23:16:43,023 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:16:43,023 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:16:43,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-02 23:16:43,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:16:43,237 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr6REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 32 more)] === [2021-11-02 23:16:43,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:16:43,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1728512521, now seen corresponding path program 1 times [2021-11-02 23:16:43,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:16:43,238 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [690031351] [2021-11-02 23:16:43,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:16:43,238 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:16:43,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:16:43,239 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:16:43,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-02 23:16:43,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:16:43,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-02 23:16:43,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:16:43,814 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 [2021-11-02 23:16:43,952 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-02 23:16:43,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:16:44,179 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-02 23:16:44,179 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:16:44,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [690031351] [2021-11-02 23:16:44,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [690031351] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 23:16:44,179 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:16:44,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 7 [2021-11-02 23:16:44,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991867014] [2021-11-02 23:16:44,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 23:16:44,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:16:44,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 23:16:44,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-02 23:16:44,181 INFO L87 Difference]: Start difference. First operand 84 states and 87 transitions. Second operand has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-02 23:16:45,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:16:45,084 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2021-11-02 23:16:45,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 23:16:45,085 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 51 [2021-11-02 23:16:45,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:16:45,086 INFO L225 Difference]: With dead ends: 84 [2021-11-02 23:16:45,086 INFO L226 Difference]: Without dead ends: 84 [2021-11-02 23:16:45,086 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 91 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-02 23:16:45,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-02 23:16:45,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 82. [2021-11-02 23:16:45,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 65 states have (on average 1.2307692307692308) internal successors, (80), 76 states have internal predecessors, (80), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-02 23:16:45,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 85 transitions. [2021-11-02 23:16:45,090 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 85 transitions. Word has length 51 [2021-11-02 23:16:45,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:16:45,091 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 85 transitions. [2021-11-02 23:16:45,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-02 23:16:45,091 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 85 transitions. [2021-11-02 23:16:45,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-02 23:16:45,092 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:16:45,092 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:16:45,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-02 23:16:45,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:16:45,300 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr7REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 32 more)] === [2021-11-02 23:16:45,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:16:45,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1728512522, now seen corresponding path program 1 times [2021-11-02 23:16:45,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:16:45,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1235535681] [2021-11-02 23:16:45,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:16:45,302 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:16:45,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:16:45,303 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:16:45,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-02 23:16:45,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:16:45,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-02 23:16:45,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:16:45,879 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 [2021-11-02 23:16:46,185 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-02 23:16:46,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:16:47,103 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-02 23:16:47,103 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:16:47,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1235535681] [2021-11-02 23:16:47,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1235535681] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 23:16:47,104 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:16:47,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 13 [2021-11-02 23:16:47,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98042237] [2021-11-02 23:16:47,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-02 23:16:47,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:16:47,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-02 23:16:47,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-11-02 23:16:47,106 INFO L87 Difference]: Start difference. First operand 82 states and 85 transitions. Second operand has 14 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-02 23:16:48,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:16:48,836 INFO L93 Difference]: Finished difference Result 83 states and 85 transitions. [2021-11-02 23:16:48,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 23:16:48,837 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 51 [2021-11-02 23:16:48,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:16:48,839 INFO L225 Difference]: With dead ends: 83 [2021-11-02 23:16:48,839 INFO L226 Difference]: Without dead ends: 83 [2021-11-02 23:16:48,839 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-11-02 23:16:48,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-02 23:16:48,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 80. [2021-11-02 23:16:48,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 65 states have (on average 1.2) internal successors, (78), 74 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-02 23:16:48,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 83 transitions. [2021-11-02 23:16:48,843 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 83 transitions. Word has length 51 [2021-11-02 23:16:48,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:16:48,843 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 83 transitions. [2021-11-02 23:16:48,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-02 23:16:48,843 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 83 transitions. [2021-11-02 23:16:48,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-02 23:16:48,844 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:16:48,845 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:16:48,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-02 23:16:49,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:16:49,049 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 32 more)] === [2021-11-02 23:16:49,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:16:49,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1728512559, now seen corresponding path program 1 times [2021-11-02 23:16:49,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:16:49,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [627850618] [2021-11-02 23:16:49,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:16:49,049 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:16:49,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:16:49,050 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:16:49,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-02 23:16:49,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:16:49,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-02 23:16:49,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:16:49,874 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 [2021-11-02 23:16:49,976 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-02 23:16:49,977 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 24 treesize of output 31 [2021-11-02 23:16:50,116 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 [2021-11-02 23:16:50,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:16:50,235 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 25 treesize of output 13 [2021-11-02 23:16:50,294 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-02 23:16:50,294 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 78 treesize of output 56 [2021-11-02 23:16:50,432 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:16:50,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [627850618] [2021-11-02 23:16:50,433 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [dll_circular_create_~head~0.offset] [2021-11-02 23:16:50,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1521748298] [2021-11-02 23:16:50,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:16:50,433 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-02 23:16:50,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/cvc4 [2021-11-02 23:16:50,438 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-02 23:16:50,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-02 23:16:51,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:16:51,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-02 23:16:51,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:16:51,317 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 8 treesize of output 6 [2021-11-02 23:16:51,374 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 [2021-11-02 23:16:51,475 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-02 23:16:51,476 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 25 treesize of output 32 [2021-11-02 23:16:51,578 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 [2021-11-02 23:16:51,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:16:51,644 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 25 treesize of output 13 [2021-11-02 23:16:51,691 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-02 23:16:51,692 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 80 treesize of output 58 [2021-11-02 23:16:51,730 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [dll_circular_create_~head~0.offset] [2021-11-02 23:16:51,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815165369] [2021-11-02 23:16:51,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:16:51,730 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:16:51,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:16:51,745 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:16:51,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-02 23:16:52,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:16:52,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-02 23:16:52,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:16:52,467 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 [2021-11-02 23:16:52,541 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 23:16:52,541 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 20 treesize of output 20 [2021-11-02 23:16:52,613 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 [2021-11-02 23:16:52,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:16:52,698 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 25 treesize of output 13 [2021-11-02 23:16:52,737 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-02 23:16:52,738 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 50 treesize of output 34 [2021-11-02 23:16:52,826 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [dll_circular_create_~head~0.offset] [2021-11-02 23:16:52,826 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:16:52,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-11-02 23:16:52,827 ERROR L172 FreeRefinementEngine]: Strategy WOLF failed to provide any proof altough trace is infeasible [2021-11-02 23:16:52,827 INFO L627 BasicCegarLoop]: Counterexample might be feasible [2021-11-02 23:16:52,834 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-11-02 23:16:52,836 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location dll_circular_createErr0REQUIRES_VIOLATION [2021-11-02 23:16:52,836 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location dll_circular_createErr1REQUIRES_VIOLATION [2021-11-02 23:16:52,837 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location dll_circular_createErr2REQUIRES_VIOLATION [2021-11-02 23:16:52,837 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location dll_circular_createErr3REQUIRES_VIOLATION [2021-11-02 23:16:52,837 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location dll_circular_createErr4REQUIRES_VIOLATION [2021-11-02 23:16:52,837 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location dll_circular_createErr5REQUIRES_VIOLATION [2021-11-02 23:16:52,837 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location dll_circular_createErr6REQUIRES_VIOLATION [2021-11-02 23:16:52,837 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location dll_circular_createErr7REQUIRES_VIOLATION [2021-11-02 23:16:52,837 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location dll_circular_createErr8REQUIRES_VIOLATION [2021-11-02 23:16:52,837 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location dll_circular_createErr9REQUIRES_VIOLATION [2021-11-02 23:16:52,837 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location dll_circular_createErr10REQUIRES_VIOLATION [2021-11-02 23:16:52,837 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location dll_circular_createErr11REQUIRES_VIOLATION [2021-11-02 23:16:52,838 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location dll_circular_createErr12REQUIRES_VIOLATION [2021-11-02 23:16:52,838 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location dll_circular_createErr13REQUIRES_VIOLATION [2021-11-02 23:16:52,838 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location dll_circular_createErr14REQUIRES_VIOLATION [2021-11-02 23:16:52,838 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location dll_circular_createErr15REQUIRES_VIOLATION [2021-11-02 23:16:52,838 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-11-02 23:16:52,838 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION [2021-11-02 23:16:52,838 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION [2021-11-02 23:16:52,838 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION [2021-11-02 23:16:52,838 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION [2021-11-02 23:16:52,838 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6REQUIRES_VIOLATION [2021-11-02 23:16:52,838 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION [2021-11-02 23:16:52,839 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8REQUIRES_VIOLATION [2021-11-02 23:16:52,839 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr9REQUIRES_VIOLATION [2021-11-02 23:16:52,839 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10REQUIRES_VIOLATION [2021-11-02 23:16:52,839 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11REQUIRES_VIOLATION [2021-11-02 23:16:52,839 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12REQUIRES_VIOLATION [2021-11-02 23:16:52,839 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr13REQUIRES_VIOLATION [2021-11-02 23:16:52,839 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14ASSERT_VIOLATIONMEMORY_FREE [2021-11-02 23:16:52,840 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr15ASSERT_VIOLATIONMEMORY_FREE [2021-11-02 23:16:52,840 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr16ASSERT_VIOLATIONMEMORY_FREE [2021-11-02 23:16:52,840 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr17ASSERT_VIOLATIONMEMORY_LEAK [2021-11-02 23:16:52,840 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr18ENSURES_VIOLATIONMEMORY_LEAK [2021-11-02 23:16:52,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-02 23:16:53,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-02 23:16:53,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-02 23:16:53,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:16:53,447 INFO L731 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:16:53,449 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-02 23:16:53,462 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.11 11:16:53 BoogieIcfgContainer [2021-11-02 23:16:53,462 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-02 23:16:53,462 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-02 23:16:53,463 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-02 23:16:53,463 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-02 23:16:53,463 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:15:09" (3/4) ... [2021-11-02 23:16:53,466 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-02 23:16:53,466 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-02 23:16:53,467 INFO L168 Benchmark]: Toolchain (without parser) took 105572.68 ms. Allocated memory was 75.5 MB in the beginning and 113.2 MB in the end (delta: 37.7 MB). Free memory was 56.0 MB in the beginning and 40.6 MB in the end (delta: 15.4 MB). Peak memory consumption was 54.1 MB. Max. memory is 16.1 GB. [2021-11-02 23:16:53,468 INFO L168 Benchmark]: CDTParser took 0.42 ms. Allocated memory is still 75.5 MB. Free memory is still 55.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-02 23:16:53,468 INFO L168 Benchmark]: CACSL2BoogieTranslator took 784.64 ms. Allocated memory is still 75.5 MB. Free memory was 55.8 MB in the beginning and 50.0 MB in the end (delta: 5.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-02 23:16:53,468 INFO L168 Benchmark]: Boogie Preprocessor took 136.02 ms. Allocated memory is still 75.5 MB. Free memory was 50.0 MB in the beginning and 46.9 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-02 23:16:53,469 INFO L168 Benchmark]: RCFGBuilder took 1030.21 ms. Allocated memory is still 75.5 MB. Free memory was 46.9 MB in the beginning and 42.7 MB in the end (delta: 4.2 MB). Peak memory consumption was 20.0 MB. Max. memory is 16.1 GB. [2021-11-02 23:16:53,469 INFO L168 Benchmark]: TraceAbstraction took 103598.27 ms. Allocated memory was 75.5 MB in the beginning and 113.2 MB in the end (delta: 37.7 MB). Free memory was 42.0 MB in the beginning and 41.6 MB in the end (delta: 425.2 kB). Peak memory consumption was 37.4 MB. Max. memory is 16.1 GB. [2021-11-02 23:16:53,470 INFO L168 Benchmark]: Witness Printer took 4.16 ms. Allocated memory is still 113.2 MB. Free memory was 41.6 MB in the beginning and 40.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-02 23:16:53,471 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.42 ms. Allocated memory is still 75.5 MB. Free memory is still 55.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 784.64 ms. Allocated memory is still 75.5 MB. Free memory was 55.8 MB in the beginning and 50.0 MB in the end (delta: 5.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 136.02 ms. Allocated memory is still 75.5 MB. Free memory was 50.0 MB in the beginning and 46.9 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1030.21 ms. Allocated memory is still 75.5 MB. Free memory was 46.9 MB in the beginning and 42.7 MB in the end (delta: 4.2 MB). Peak memory consumption was 20.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 103598.27 ms. Allocated memory was 75.5 MB in the beginning and 113.2 MB in the end (delta: 37.7 MB). Free memory was 42.0 MB in the beginning and 41.6 MB in the end (delta: 425.2 kB). Peak memory consumption was 37.4 MB. Max. memory is 16.1 GB. * Witness Printer took 4.16 ms. Allocated memory is still 113.2 MB. Free memory was 41.6 MB in the beginning and 40.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 606]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L600] const int len = 5; [L601] const int data_init = 1; [L602] CALL, EXPR dll_circular_create(len, data_init) [L576] DLL last = (DLL) malloc(sizeof(struct node)); [L577] COND FALSE !(((void *)0) == last) [L580] last->next = last [L581] last->prev = last [L582] last->data = data [L583] DLL head = last; [L584] COND TRUE len > 1 [L585] DLL new_head = (DLL) malloc(sizeof(struct node)); [L586] COND FALSE !(((void *)0) == new_head) [L589] new_head->next = head [L590] new_head->data = data [L591] head->prev = new_head [L592] head = new_head [L593] len-- [L584] COND TRUE len > 1 [L585] DLL new_head = (DLL) malloc(sizeof(struct node)); [L586] COND FALSE !(((void *)0) == new_head) [L589] new_head->next = head [L590] new_head->data = data [L591] head->prev = new_head [L592] head = new_head [L593] len-- [L584] COND TRUE len > 1 [L585] DLL new_head = (DLL) malloc(sizeof(struct node)); [L586] COND FALSE !(((void *)0) == new_head) [L589] new_head->next = head [L590] new_head->data = data [L591] head->prev = new_head [L592] head = new_head [L593] len-- [L584] COND TRUE len > 1 [L585] DLL new_head = (DLL) malloc(sizeof(struct node)); [L586] COND FALSE !(((void *)0) == new_head) [L589] new_head->next = head [L590] new_head->data = data [L591] head->prev = new_head [L592] head = new_head [L593] len-- [L584] COND FALSE !(len > 1) [L595] last->next = head [L596] head->prev = last [L597] return head; [L602] RET, EXPR dll_circular_create(len, data_init) [L602] DLL head = dll_circular_create(len, data_init); [L603] int data_new = 1; [L604] DLL ptr = head; [L606] EXPR ptr->data [L606] COND FALSE !(data_init != ptr->data) [L609] ptr->data = data_new [L610] EXPR ptr->next [L610] ptr = ptr->next [L611] data_new++ [L612] COND TRUE ptr != head [L606] ptr->data - UnprovableResult [Line: 580]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 580]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 581]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 581]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 582]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 582]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 589]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 589]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 590]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 590]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 591]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 591]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 595]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 595]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 596]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 596]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 606]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 609]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 609]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 610]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 610]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 613]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 613]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 614]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 614]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 618]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 618]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 621]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 621]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 622]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 622]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 622]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 626]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 599]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 105 locations, 35 error locations. Started 1 CEGAR loops. OverallTime: 103.5s, OverallIterations: 17, TraceHistogramMax: 4, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 18.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 935 SDtfs, 899 SDslu, 2863 SDs, 0 SdLazy, 2213 SolverSat, 169 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 8.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 939 GetRequests, 771 SyntacticMatches, 19 SemanticMatches, 149 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 68.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=89occurred in iteration=0, InterpolantAutomatonStates: 104, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 16 MinimizatonAttempts, 26 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 2.0s SatisfiabilityAnalysisTime, 73.1s InterpolantComputationTime, 508 NumberOfCodeBlocks, 490 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 882 ConstructedInterpolants, 54 QuantifiedInterpolants, 5222 SizeOfPredicates, 65 NumberOfNonLiveVariables, 2856 ConjunctsInSsa, 142 ConjunctsInUnsatCore, 32 InterpolantComputations, 22 PerfectInterpolantSequences, 304/440 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-02 23:16:53,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd562055-622d-4676-a078-5c13b9421898/bin/uautomizer-tBqnrhUYjU/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 Writing output log to file Ultimate.log Result: UNKNOWN