./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../../sv-benchmarks/c/heap-manipulation/dll_of_dll-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c211dea9-a2b4-4526-951d-810198c02b6b/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c211dea9-a2b4-4526-951d-810198c02b6b/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_c211dea9-a2b4-4526-951d-810198c02b6b/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c211dea9-a2b4-4526-951d-810198c02b6b/bin/uautomizer-tBqnrhUYjU/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/heap-manipulation/dll_of_dll-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c211dea9-a2b4-4526-951d-810198c02b6b/bin/uautomizer-tBqnrhUYjU/config/svcomp-MemCleanup-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c211dea9-a2b4-4526-951d-810198c02b6b/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-memcleanup) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0eca46c14885d62179341dcc13b398752af03e020a80dcf533f4c9afc7372707 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 22:49:23,195 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:49:23,197 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:49:23,239 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:49:23,239 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:49:23,240 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:49:23,242 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:49:23,245 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:49:23,247 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:49:23,248 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:49:23,249 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:49:23,250 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:49:23,251 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:49:23,252 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:49:23,254 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:49:23,255 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:49:23,256 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:49:23,257 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:49:23,260 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:49:23,262 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:49:23,264 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:49:23,270 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:49:23,271 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:49:23,272 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:49:23,276 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:49:23,277 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:49:23,277 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:49:23,278 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:49:23,279 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:49:23,280 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:49:23,280 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:49:23,281 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:49:23,282 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:49:23,283 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:49:23,293 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:49:23,294 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:49:23,295 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:49:23,295 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:49:23,295 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:49:23,296 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:49:23,297 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:49:23,298 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c211dea9-a2b4-4526-951d-810198c02b6b/bin/uautomizer-tBqnrhUYjU/config/svcomp-MemCleanup-32bit-Automizer_Default.epf [2021-11-02 22:49:23,351 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:49:23,351 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:49:23,351 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:49:23,352 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:49:23,353 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:49:23,353 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:49:23,353 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:49:23,353 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:49:23,353 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 22:49:23,354 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-02 22:49:23,354 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 22:49:23,354 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 22:49:23,354 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:49:23,354 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-02 22:49:23,354 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-02 22:49:23,355 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 22:49:23,355 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-02 22:49:23,355 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 22:49:23,355 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:49:23,355 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:49:23,356 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:49:23,356 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 22:49:23,356 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:49:23,356 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:49:23,356 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 22:49:23,357 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 22:49:23,357 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 22:49:23,357 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:49:23,357 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_c211dea9-a2b4-4526-951d-810198c02b6b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c211dea9-a2b4-4526-951d-810198c02b6b/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0eca46c14885d62179341dcc13b398752af03e020a80dcf533f4c9afc7372707 [2021-11-02 22:49:23,622 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:49:23,651 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:49:23,654 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:49:23,655 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:49:23,656 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:49:23,658 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c211dea9-a2b4-4526-951d-810198c02b6b/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/heap-manipulation/dll_of_dll-2.i [2021-11-02 22:49:23,722 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c211dea9-a2b4-4526-951d-810198c02b6b/bin/uautomizer-tBqnrhUYjU/data/e15dba0fb/9d485ae2ec774aadbe96c9306fac4d53/FLAG9cf8ab849 [2021-11-02 22:49:24,293 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:49:24,294 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c211dea9-a2b4-4526-951d-810198c02b6b/sv-benchmarks/c/heap-manipulation/dll_of_dll-2.i [2021-11-02 22:49:24,315 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c211dea9-a2b4-4526-951d-810198c02b6b/bin/uautomizer-tBqnrhUYjU/data/e15dba0fb/9d485ae2ec774aadbe96c9306fac4d53/FLAG9cf8ab849 [2021-11-02 22:49:24,690 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c211dea9-a2b4-4526-951d-810198c02b6b/bin/uautomizer-tBqnrhUYjU/data/e15dba0fb/9d485ae2ec774aadbe96c9306fac4d53 [2021-11-02 22:49:24,692 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:49:24,693 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-02 22:49:24,695 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:49:24,695 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:49:24,698 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:49:24,699 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:49:24" (1/1) ... [2021-11-02 22:49:24,700 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60bb6ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:49:24, skipping insertion in model container [2021-11-02 22:49:24,700 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:49:24" (1/1) ... [2021-11-02 22:49:24,707 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:49:24,748 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:49:25,107 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_c211dea9-a2b4-4526-951d-810198c02b6b/sv-benchmarks/c/heap-manipulation/dll_of_dll-2.i[22634,22647] [2021-11-02 22:49:25,183 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:49:25,191 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 22:49:25,220 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_c211dea9-a2b4-4526-951d-810198c02b6b/sv-benchmarks/c/heap-manipulation/dll_of_dll-2.i[22634,22647] [2021-11-02 22:49:25,247 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:49:25,286 INFO L208 MainTranslator]: Completed translation [2021-11-02 22:49:25,286 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:49:25 WrapperNode [2021-11-02 22:49:25,286 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:49:25,287 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 22:49:25,287 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 22:49:25,287 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 22:49:25,298 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:49:25" (1/1) ... [2021-11-02 22:49:25,298 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:49:25" (1/1) ... [2021-11-02 22:49:25,314 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:49:25" (1/1) ... [2021-11-02 22:49:25,315 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:49:25" (1/1) ... [2021-11-02 22:49:25,345 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:49:25" (1/1) ... [2021-11-02 22:49:25,365 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:49:25" (1/1) ... [2021-11-02 22:49:25,372 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:49:25" (1/1) ... [2021-11-02 22:49:25,393 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 22:49:25,398 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 22:49:25,398 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 22:49:25,398 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 22:49:25,399 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:49:25" (1/1) ... [2021-11-02 22:49:25,415 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:49:25,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c211dea9-a2b4-4526-951d-810198c02b6b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:49:25,434 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c211dea9-a2b4-4526-951d-810198c02b6b/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 22:49:25,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c211dea9-a2b4-4526-951d-810198c02b6b/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 22:49:25,470 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-02 22:49:25,471 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 22:49:25,471 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-02 22:49:25,471 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-11-02 22:49:25,471 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-11-02 22:49:25,471 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-11-02 22:49:25,472 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2021-11-02 22:49:25,472 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_or_die_slave [2021-11-02 22:49:25,472 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_or_die_master [2021-11-02 22:49:25,472 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_insert_slave [2021-11-02 22:49:25,472 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create_generic [2021-11-02 22:49:25,472 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create_slave [2021-11-02 22:49:25,472 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_destroy_slave [2021-11-02 22:49:25,472 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_destroy_nested_lists [2021-11-02 22:49:25,473 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_reinit_nested_lists [2021-11-02 22:49:25,473 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_destroy_master [2021-11-02 22:49:25,473 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_insert_master [2021-11-02 22:49:25,473 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create_master [2021-11-02 22:49:25,473 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_base [2021-11-02 22:49:25,473 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_full [2021-11-02 22:49:25,473 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_dangling [2021-11-02 22:49:25,474 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_init [2021-11-02 22:49:25,474 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-02 22:49:25,474 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-02 22:49:25,474 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-11-02 22:49:25,474 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-11-02 22:49:25,474 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-11-02 22:49:25,474 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-11-02 22:49:25,475 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 22:49:25,475 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-02 22:49:25,475 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-02 22:49:25,475 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-02 22:49:25,475 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-02 22:49:25,475 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-02 22:49:25,475 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-02 22:49:25,475 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-02 22:49:25,475 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-02 22:49:25,475 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-02 22:49:25,475 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-02 22:49:25,476 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-02 22:49:25,476 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-02 22:49:25,476 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-02 22:49:25,476 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-02 22:49:25,476 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-02 22:49:25,476 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-02 22:49:25,476 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-11-02 22:49:25,476 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-11-02 22:49:25,476 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-02 22:49:25,476 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-02 22:49:25,476 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-02 22:49:25,477 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-02 22:49:25,477 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-02 22:49:25,477 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-02 22:49:25,477 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-02 22:49:25,477 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-02 22:49:25,477 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-02 22:49:25,477 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-02 22:49:25,478 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-02 22:49:25,478 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-02 22:49:25,478 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-02 22:49:25,478 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-02 22:49:25,478 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-02 22:49:25,478 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-02 22:49:25,478 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-02 22:49:25,478 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-02 22:49:25,479 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-02 22:49:25,479 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-02 22:49:25,479 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-02 22:49:25,479 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-02 22:49:25,479 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-02 22:49:25,479 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-02 22:49:25,479 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-02 22:49:25,479 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-02 22:49:25,480 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-02 22:49:25,480 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-02 22:49:25,480 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-02 22:49:25,480 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-02 22:49:25,480 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-02 22:49:25,480 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-02 22:49:25,480 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-02 22:49:25,481 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-02 22:49:25,481 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-02 22:49:25,481 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-02 22:49:25,481 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-02 22:49:25,481 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-02 22:49:25,481 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-11-02 22:49:25,481 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-02 22:49:25,481 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-02 22:49:25,482 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-02 22:49:25,482 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-02 22:49:25,482 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-02 22:49:25,482 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-02 22:49:25,482 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-02 22:49:25,482 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-02 22:49:25,482 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-02 22:49:25,482 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-02 22:49:25,483 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-02 22:49:25,483 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-02 22:49:25,483 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-02 22:49:25,483 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-02 22:49:25,483 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-02 22:49:25,483 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-02 22:49:25,483 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-02 22:49:25,484 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-02 22:49:25,484 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-02 22:49:25,484 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-02 22:49:25,484 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-02 22:49:25,484 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-02 22:49:25,484 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-02 22:49:25,484 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-02 22:49:25,484 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-02 22:49:25,485 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-02 22:49:25,485 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-02 22:49:25,485 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-02 22:49:25,485 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-02 22:49:25,485 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-02 22:49:25,485 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-02 22:49:25,485 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-02 22:49:25,485 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-02 22:49:25,486 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-02 22:49:25,486 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-02 22:49:25,486 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-02 22:49:25,486 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-02 22:49:25,486 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-02 22:49:25,486 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-02 22:49:25,486 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-02 22:49:25,487 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-02 22:49:25,487 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-02 22:49:25,487 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-02 22:49:25,487 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-02 22:49:25,487 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-02 22:49:25,487 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-02 22:49:25,487 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-02 22:49:25,487 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-11-02 22:49:25,488 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2021-11-02 22:49:25,488 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_or_die_slave [2021-11-02 22:49:25,488 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-02 22:49:25,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-02 22:49:25,488 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_or_die_master [2021-11-02 22:49:25,488 INFO L130 BoogieDeclarations]: Found specification of procedure dll_insert_slave [2021-11-02 22:49:25,488 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-02 22:49:25,488 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create_generic [2021-11-02 22:49:25,489 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-02 22:49:25,489 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-02 22:49:25,489 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-02 22:49:25,489 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create_slave [2021-11-02 22:49:25,489 INFO L130 BoogieDeclarations]: Found specification of procedure dll_destroy_slave [2021-11-02 22:49:25,489 INFO L130 BoogieDeclarations]: Found specification of procedure dll_destroy_nested_lists [2021-11-02 22:49:25,489 INFO L130 BoogieDeclarations]: Found specification of procedure dll_reinit_nested_lists [2021-11-02 22:49:25,489 INFO L130 BoogieDeclarations]: Found specification of procedure dll_destroy_master [2021-11-02 22:49:25,490 INFO L130 BoogieDeclarations]: Found specification of procedure dll_insert_master [2021-11-02 22:49:25,490 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create_master [2021-11-02 22:49:25,490 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_base [2021-11-02 22:49:25,490 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_full [2021-11-02 22:49:25,490 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_dangling [2021-11-02 22:49:25,490 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_init [2021-11-02 22:49:25,490 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-02 22:49:25,490 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-02 22:49:25,491 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 22:49:25,491 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 22:49:25,491 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-02 22:49:25,491 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-02 22:49:26,390 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 22:49:26,391 INFO L299 CfgBuilder]: Removed 38 assume(true) statements. [2021-11-02 22:49:26,393 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:49:26 BoogieIcfgContainer [2021-11-02 22:49:26,393 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 22:49:26,395 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 22:49:26,395 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 22:49:26,399 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 22:49:26,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 10:49:24" (1/3) ... [2021-11-02 22:49:26,400 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66f92a10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:49:26, skipping insertion in model container [2021-11-02 22:49:26,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:49:25" (2/3) ... [2021-11-02 22:49:26,400 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66f92a10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:49:26, skipping insertion in model container [2021-11-02 22:49:26,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:49:26" (3/3) ... [2021-11-02 22:49:26,402 INFO L111 eAbstractionObserver]: Analyzing ICFG dll_of_dll-2.i [2021-11-02 22:49:26,407 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 22:49:26,407 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 98 error locations. [2021-11-02 22:49:26,452 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 22:49:26,458 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 22:49:26,458 INFO L340 AbstractCegarLoop]: Starting to check reachability of 98 error locations. [2021-11-02 22:49:26,487 INFO L276 IsEmpty]: Start isEmpty. Operand has 311 states, 156 states have (on average 2.0576923076923075) internal successors, (321), 273 states have internal predecessors, (321), 37 states have call successors, (37), 19 states have call predecessors, (37), 19 states have return successors, (37), 35 states have call predecessors, (37), 37 states have call successors, (37) [2021-11-02 22:49:26,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-02 22:49:26,493 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:49:26,493 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:49:26,494 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting alloc_or_die_masterErr0REQUIRES_VIOLATION === [inspect_initErr0REQUIRES_VIOLATION, inspect_initErr1REQUIRES_VIOLATION, inspect_initErr2REQUIRES_VIOLATION, inspect_initErr3REQUIRES_VIOLATION (and 94 more)] === [2021-11-02 22:49:26,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:49:26,499 INFO L85 PathProgramCache]: Analyzing trace with hash 831054265, now seen corresponding path program 1 times [2021-11-02 22:49:26,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:49:26,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038501777] [2021-11-02 22:49:26,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:49:26,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:49:26,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:26,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:49:26,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:26,738 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 22:49:26,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:49:26,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038501777] [2021-11-02 22:49:26,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038501777] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:49:26,740 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:49:26,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:49:26,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87725546] [2021-11-02 22:49:26,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:49:26,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:49:26,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:49:26,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:49:26,765 INFO L87 Difference]: Start difference. First operand has 311 states, 156 states have (on average 2.0576923076923075) internal successors, (321), 273 states have internal predecessors, (321), 37 states have call successors, (37), 19 states have call predecessors, (37), 19 states have return successors, (37), 35 states have call predecessors, (37), 37 states have call successors, (37) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:49:27,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:49:27,303 INFO L93 Difference]: Finished difference Result 347 states and 382 transitions. [2021-11-02 22:49:27,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:49:27,305 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-11-02 22:49:27,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:49:27,327 INFO L225 Difference]: With dead ends: 347 [2021-11-02 22:49:27,327 INFO L226 Difference]: Without dead ends: 344 [2021-11-02 22:49:27,338 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 22:49:27,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-11-02 22:49:27,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 306. [2021-11-02 22:49:27,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 154 states have (on average 1.7987012987012987) internal successors, (277), 269 states have internal predecessors, (277), 37 states have call successors, (37), 19 states have call predecessors, (37), 17 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-02 22:49:27,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 336 transitions. [2021-11-02 22:49:27,419 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 336 transitions. Word has length 17 [2021-11-02 22:49:27,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:49:27,420 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 336 transitions. [2021-11-02 22:49:27,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:49:27,420 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 336 transitions. [2021-11-02 22:49:27,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-02 22:49:27,421 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:49:27,421 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:49:27,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 22:49:27,422 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting alloc_or_die_masterErr0REQUIRES_VIOLATION === [inspect_initErr0REQUIRES_VIOLATION, inspect_initErr1REQUIRES_VIOLATION, inspect_initErr2REQUIRES_VIOLATION, inspect_initErr3REQUIRES_VIOLATION (and 94 more)] === [2021-11-02 22:49:27,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:49:27,423 INFO L85 PathProgramCache]: Analyzing trace with hash 831054327, now seen corresponding path program 1 times [2021-11-02 22:49:27,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:49:27,423 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789148668] [2021-11-02 22:49:27,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:49:27,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:49:27,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:27,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:49:27,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:27,576 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 22:49:27,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:49:27,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789148668] [2021-11-02 22:49:27,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789148668] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:49:27,577 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:49:27,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:49:27,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887408865] [2021-11-02 22:49:27,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:49:27,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:49:27,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:49:27,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:49:27,587 INFO L87 Difference]: Start difference. First operand 306 states and 336 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:49:28,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:49:28,212 INFO L93 Difference]: Finished difference Result 341 states and 376 transitions. [2021-11-02 22:49:28,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:49:28,213 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-11-02 22:49:28,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:49:28,216 INFO L225 Difference]: With dead ends: 341 [2021-11-02 22:49:28,217 INFO L226 Difference]: Without dead ends: 341 [2021-11-02 22:49:28,218 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 22:49:28,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2021-11-02 22:49:28,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 303. [2021-11-02 22:49:28,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 154 states have (on average 1.7792207792207793) internal successors, (274), 266 states have internal predecessors, (274), 37 states have call successors, (37), 19 states have call predecessors, (37), 17 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-02 22:49:28,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 333 transitions. [2021-11-02 22:49:28,254 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 333 transitions. Word has length 17 [2021-11-02 22:49:28,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:49:28,255 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 333 transitions. [2021-11-02 22:49:28,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:49:28,256 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 333 transitions. [2021-11-02 22:49:28,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-02 22:49:28,261 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:49:28,262 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:49:28,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 22:49:28,262 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting alloc_or_die_masterErr1REQUIRES_VIOLATION === [inspect_initErr0REQUIRES_VIOLATION, inspect_initErr1REQUIRES_VIOLATION, inspect_initErr2REQUIRES_VIOLATION, inspect_initErr3REQUIRES_VIOLATION (and 94 more)] === [2021-11-02 22:49:28,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:49:28,263 INFO L85 PathProgramCache]: Analyzing trace with hash 831054328, now seen corresponding path program 1 times [2021-11-02 22:49:28,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:49:28,263 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386434090] [2021-11-02 22:49:28,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:49:28,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:49:28,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:28,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:49:28,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:28,383 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 22:49:28,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:49:28,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386434090] [2021-11-02 22:49:28,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386434090] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:49:28,384 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:49:28,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:49:28,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637591873] [2021-11-02 22:49:28,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:49:28,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:49:28,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:49:28,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:49:28,386 INFO L87 Difference]: Start difference. First operand 303 states and 333 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:49:29,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:49:29,010 INFO L93 Difference]: Finished difference Result 338 states and 373 transitions. [2021-11-02 22:49:29,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:49:29,011 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-11-02 22:49:29,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:49:29,013 INFO L225 Difference]: With dead ends: 338 [2021-11-02 22:49:29,013 INFO L226 Difference]: Without dead ends: 338 [2021-11-02 22:49:29,013 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 22:49:29,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-11-02 22:49:29,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 300. [2021-11-02 22:49:29,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 154 states have (on average 1.7597402597402598) internal successors, (271), 263 states have internal predecessors, (271), 37 states have call successors, (37), 19 states have call predecessors, (37), 17 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-02 22:49:29,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 330 transitions. [2021-11-02 22:49:29,024 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 330 transitions. Word has length 17 [2021-11-02 22:49:29,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:49:29,025 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 330 transitions. [2021-11-02 22:49:29,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:49:29,025 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 330 transitions. [2021-11-02 22:49:29,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-02 22:49:29,026 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:49:29,026 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:49:29,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-02 22:49:29,026 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting alloc_or_die_slaveErr0REQUIRES_VIOLATION === [inspect_initErr0REQUIRES_VIOLATION, inspect_initErr1REQUIRES_VIOLATION, inspect_initErr2REQUIRES_VIOLATION, inspect_initErr3REQUIRES_VIOLATION (and 94 more)] === [2021-11-02 22:49:29,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:49:29,027 INFO L85 PathProgramCache]: Analyzing trace with hash -784305853, now seen corresponding path program 1 times [2021-11-02 22:49:29,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:49:29,027 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100432780] [2021-11-02 22:49:29,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:49:29,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:49:29,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:29,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:49:29,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:29,082 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 22:49:29,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:49:29,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100432780] [2021-11-02 22:49:29,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100432780] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:49:29,083 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:49:29,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:49:29,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573402757] [2021-11-02 22:49:29,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:49:29,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:49:29,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:49:29,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:49:29,085 INFO L87 Difference]: Start difference. First operand 300 states and 330 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:49:29,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:49:29,626 INFO L93 Difference]: Finished difference Result 336 states and 371 transitions. [2021-11-02 22:49:29,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:49:29,626 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-11-02 22:49:29,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:49:29,629 INFO L225 Difference]: With dead ends: 336 [2021-11-02 22:49:29,630 INFO L226 Difference]: Without dead ends: 336 [2021-11-02 22:49:29,631 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 22:49:29,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-11-02 22:49:29,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 298. [2021-11-02 22:49:29,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 154 states have (on average 1.7467532467532467) internal successors, (269), 261 states have internal predecessors, (269), 37 states have call successors, (37), 19 states have call predecessors, (37), 17 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-02 22:49:29,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 328 transitions. [2021-11-02 22:49:29,645 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 328 transitions. Word has length 17 [2021-11-02 22:49:29,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:49:29,646 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 328 transitions. [2021-11-02 22:49:29,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:49:29,646 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 328 transitions. [2021-11-02 22:49:29,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-02 22:49:29,647 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:49:29,647 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:49:29,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-02 22:49:29,648 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting alloc_or_die_slaveErr1REQUIRES_VIOLATION === [inspect_initErr0REQUIRES_VIOLATION, inspect_initErr1REQUIRES_VIOLATION, inspect_initErr2REQUIRES_VIOLATION, inspect_initErr3REQUIRES_VIOLATION (and 94 more)] === [2021-11-02 22:49:29,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:49:29,648 INFO L85 PathProgramCache]: Analyzing trace with hash -784305852, now seen corresponding path program 1 times [2021-11-02 22:49:29,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:49:29,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472361981] [2021-11-02 22:49:29,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:49:29,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:49:29,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:29,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:49:29,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:29,741 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 22:49:29,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:49:29,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472361981] [2021-11-02 22:49:29,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472361981] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:49:29,742 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:49:29,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:49:29,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673531158] [2021-11-02 22:49:29,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:49:29,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:49:29,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:49:29,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:49:29,751 INFO L87 Difference]: Start difference. First operand 298 states and 328 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:49:30,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:49:30,345 INFO L93 Difference]: Finished difference Result 334 states and 369 transitions. [2021-11-02 22:49:30,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:49:30,346 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-11-02 22:49:30,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:49:30,348 INFO L225 Difference]: With dead ends: 334 [2021-11-02 22:49:30,349 INFO L226 Difference]: Without dead ends: 334 [2021-11-02 22:49:30,349 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 22:49:30,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-11-02 22:49:30,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 296. [2021-11-02 22:49:30,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 154 states have (on average 1.7337662337662338) internal successors, (267), 259 states have internal predecessors, (267), 37 states have call successors, (37), 19 states have call predecessors, (37), 17 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-02 22:49:30,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 326 transitions. [2021-11-02 22:49:30,366 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 326 transitions. Word has length 17 [2021-11-02 22:49:30,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:49:30,367 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 326 transitions. [2021-11-02 22:49:30,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:49:30,369 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 326 transitions. [2021-11-02 22:49:30,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-02 22:49:30,370 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:49:30,370 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:49:30,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-02 22:49:30,371 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting dll_insert_slaveErr0REQUIRES_VIOLATION === [inspect_initErr0REQUIRES_VIOLATION, inspect_initErr1REQUIRES_VIOLATION, inspect_initErr2REQUIRES_VIOLATION, inspect_initErr3REQUIRES_VIOLATION (and 94 more)] === [2021-11-02 22:49:30,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:49:30,371 INFO L85 PathProgramCache]: Analyzing trace with hash 76763986, now seen corresponding path program 1 times [2021-11-02 22:49:30,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:49:30,372 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426709447] [2021-11-02 22:49:30,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:49:30,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:49:30,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:30,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:49:30,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:30,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-02 22:49:30,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:30,572 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 22:49:30,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:49:30,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426709447] [2021-11-02 22:49:30,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426709447] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:49:30,574 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:49:30,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 22:49:30,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124984576] [2021-11-02 22:49:30,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 22:49:30,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:49:30,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 22:49:30,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:49:30,576 INFO L87 Difference]: Start difference. First operand 296 states and 326 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (7), 6 states have call predecessors, (7), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-02 22:49:31,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:49:31,631 INFO L93 Difference]: Finished difference Result 366 states and 410 transitions. [2021-11-02 22:49:31,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 22:49:31,631 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (7), 6 states have call predecessors, (7), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2021-11-02 22:49:31,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:49:31,636 INFO L225 Difference]: With dead ends: 366 [2021-11-02 22:49:31,637 INFO L226 Difference]: Without dead ends: 366 [2021-11-02 22:49:31,637 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:49:31,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-11-02 22:49:31,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 314. [2021-11-02 22:49:31,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 165 states have (on average 1.709090909090909) internal successors, (282), 270 states have internal predecessors, (282), 42 states have call successors, (42), 21 states have call predecessors, (42), 19 states have return successors, (30), 25 states have call predecessors, (30), 27 states have call successors, (30) [2021-11-02 22:49:31,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 354 transitions. [2021-11-02 22:49:31,648 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 354 transitions. Word has length 23 [2021-11-02 22:49:31,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:49:31,649 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 354 transitions. [2021-11-02 22:49:31,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (7), 6 states have call predecessors, (7), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-02 22:49:31,649 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 354 transitions. [2021-11-02 22:49:31,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-02 22:49:31,650 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:49:31,650 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:49:31,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-02 22:49:31,650 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting dll_insert_masterErr0REQUIRES_VIOLATION === [inspect_initErr0REQUIRES_VIOLATION, inspect_initErr1REQUIRES_VIOLATION, inspect_initErr2REQUIRES_VIOLATION, inspect_initErr3REQUIRES_VIOLATION (and 94 more)] === [2021-11-02 22:49:31,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:49:31,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1420747701, now seen corresponding path program 1 times [2021-11-02 22:49:31,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:49:31,651 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517487566] [2021-11-02 22:49:31,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:49:31,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:49:31,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:31,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:49:31,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:31,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-02 22:49:31,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:31,811 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 22:49:31,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:49:31,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517487566] [2021-11-02 22:49:31,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517487566] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:49:31,812 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:49:31,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-02 22:49:31,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575648456] [2021-11-02 22:49:31,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-02 22:49:31,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:49:31,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-02 22:49:31,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:49:31,813 INFO L87 Difference]: Start difference. First operand 314 states and 354 transitions. Second operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 4 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-02 22:49:33,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:49:33,406 INFO L93 Difference]: Finished difference Result 377 states and 427 transitions. [2021-11-02 22:49:33,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-02 22:49:33,407 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 4 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2021-11-02 22:49:33,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:49:33,410 INFO L225 Difference]: With dead ends: 377 [2021-11-02 22:49:33,410 INFO L226 Difference]: Without dead ends: 377 [2021-11-02 22:49:33,411 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-11-02 22:49:33,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-11-02 22:49:33,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 322. [2021-11-02 22:49:33,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 171 states have (on average 1.695906432748538) internal successors, (290), 275 states have internal predecessors, (290), 44 states have call successors, (44), 23 states have call predecessors, (44), 19 states have return successors, (32), 26 states have call predecessors, (32), 29 states have call successors, (32) [2021-11-02 22:49:33,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 366 transitions. [2021-11-02 22:49:33,424 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 366 transitions. Word has length 24 [2021-11-02 22:49:33,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:49:33,425 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 366 transitions. [2021-11-02 22:49:33,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 4 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-02 22:49:33,425 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 366 transitions. [2021-11-02 22:49:33,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-02 22:49:33,426 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:49:33,426 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:49:33,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-02 22:49:33,426 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting dll_insert_masterErr1REQUIRES_VIOLATION === [inspect_initErr0REQUIRES_VIOLATION, inspect_initErr1REQUIRES_VIOLATION, inspect_initErr2REQUIRES_VIOLATION, inspect_initErr3REQUIRES_VIOLATION (and 94 more)] === [2021-11-02 22:49:33,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:49:33,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1420747700, now seen corresponding path program 1 times [2021-11-02 22:49:33,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:49:33,427 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048569876] [2021-11-02 22:49:33,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:49:33,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:49:33,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:33,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:49:33,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:33,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-02 22:49:33,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:33,665 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 22:49:33,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:49:33,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048569876] [2021-11-02 22:49:33,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048569876] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:49:33,665 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:49:33,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-02 22:49:33,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375737483] [2021-11-02 22:49:33,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-02 22:49:33,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:49:33,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-02 22:49:33,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-11-02 22:49:33,667 INFO L87 Difference]: Start difference. First operand 322 states and 366 transitions. Second operand has 12 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-02 22:49:35,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:49:35,563 INFO L93 Difference]: Finished difference Result 383 states and 439 transitions. [2021-11-02 22:49:35,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-02 22:49:35,563 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2021-11-02 22:49:35,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:49:35,566 INFO L225 Difference]: With dead ends: 383 [2021-11-02 22:49:35,566 INFO L226 Difference]: Without dead ends: 383 [2021-11-02 22:49:35,567 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-11-02 22:49:35,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-11-02 22:49:35,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 329. [2021-11-02 22:49:35,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 176 states have (on average 1.6818181818181819) internal successors, (296), 279 states have internal predecessors, (296), 46 states have call successors, (46), 25 states have call predecessors, (46), 19 states have return successors, (34), 27 states have call predecessors, (34), 31 states have call successors, (34) [2021-11-02 22:49:35,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 376 transitions. [2021-11-02 22:49:35,580 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 376 transitions. Word has length 24 [2021-11-02 22:49:35,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:49:35,581 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 376 transitions. [2021-11-02 22:49:35,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-02 22:49:35,581 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 376 transitions. [2021-11-02 22:49:35,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-02 22:49:35,582 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:49:35,582 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:49:35,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-02 22:49:35,583 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting dll_insert_masterErr2REQUIRES_VIOLATION === [inspect_initErr0REQUIRES_VIOLATION, inspect_initErr1REQUIRES_VIOLATION, inspect_initErr2REQUIRES_VIOLATION, inspect_initErr3REQUIRES_VIOLATION (and 94 more)] === [2021-11-02 22:49:35,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:49:35,583 INFO L85 PathProgramCache]: Analyzing trace with hash 461067660, now seen corresponding path program 1 times [2021-11-02 22:49:35,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:49:35,584 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067161467] [2021-11-02 22:49:35,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:49:35,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:49:35,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:35,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:49:35,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:35,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-02 22:49:35,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:35,671 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 22:49:35,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:49:35,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067161467] [2021-11-02 22:49:35,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067161467] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:49:35,672 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:49:35,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 22:49:35,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193417016] [2021-11-02 22:49:35,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 22:49:35,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:49:35,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 22:49:35,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:49:35,674 INFO L87 Difference]: Start difference. First operand 329 states and 376 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-02 22:49:36,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:49:36,689 INFO L93 Difference]: Finished difference Result 372 states and 425 transitions. [2021-11-02 22:49:36,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:49:36,690 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2021-11-02 22:49:36,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:49:36,693 INFO L225 Difference]: With dead ends: 372 [2021-11-02 22:49:36,693 INFO L226 Difference]: Without dead ends: 372 [2021-11-02 22:49:36,693 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 22:49:36,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-11-02 22:49:36,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 328. [2021-11-02 22:49:36,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 176 states have (on average 1.6761363636363635) internal successors, (295), 278 states have internal predecessors, (295), 46 states have call successors, (46), 25 states have call predecessors, (46), 19 states have return successors, (34), 27 states have call predecessors, (34), 31 states have call successors, (34) [2021-11-02 22:49:36,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 375 transitions. [2021-11-02 22:49:36,710 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 375 transitions. Word has length 26 [2021-11-02 22:49:36,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:49:36,710 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 375 transitions. [2021-11-02 22:49:36,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-02 22:49:36,711 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 375 transitions. [2021-11-02 22:49:36,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-02 22:49:36,716 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:49:36,716 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:49:36,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-02 22:49:36,716 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting dll_insert_masterErr3REQUIRES_VIOLATION === [inspect_initErr0REQUIRES_VIOLATION, inspect_initErr1REQUIRES_VIOLATION, inspect_initErr2REQUIRES_VIOLATION, inspect_initErr3REQUIRES_VIOLATION (and 94 more)] === [2021-11-02 22:49:36,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:49:36,717 INFO L85 PathProgramCache]: Analyzing trace with hash 461067661, now seen corresponding path program 1 times [2021-11-02 22:49:36,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:49:36,719 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555150781] [2021-11-02 22:49:36,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:49:36,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:49:36,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:36,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:49:36,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:36,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-02 22:49:36,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:36,866 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 22:49:36,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:49:36,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555150781] [2021-11-02 22:49:36,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555150781] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:49:36,867 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:49:36,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 22:49:36,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878843566] [2021-11-02 22:49:36,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 22:49:36,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:49:36,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 22:49:36,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:49:36,868 INFO L87 Difference]: Start difference. First operand 328 states and 375 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-02 22:49:37,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:49:37,933 INFO L93 Difference]: Finished difference Result 371 states and 424 transitions. [2021-11-02 22:49:37,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:49:37,934 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2021-11-02 22:49:37,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:49:37,936 INFO L225 Difference]: With dead ends: 371 [2021-11-02 22:49:37,936 INFO L226 Difference]: Without dead ends: 371 [2021-11-02 22:49:37,937 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 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 22:49:37,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-11-02 22:49:37,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 327. [2021-11-02 22:49:37,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 176 states have (on average 1.6704545454545454) internal successors, (294), 277 states have internal predecessors, (294), 46 states have call successors, (46), 25 states have call predecessors, (46), 19 states have return successors, (34), 27 states have call predecessors, (34), 31 states have call successors, (34) [2021-11-02 22:49:37,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 374 transitions. [2021-11-02 22:49:37,957 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 374 transitions. Word has length 26 [2021-11-02 22:49:37,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:49:37,957 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 374 transitions. [2021-11-02 22:49:37,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-02 22:49:37,958 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 374 transitions. [2021-11-02 22:49:37,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-02 22:49:37,960 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:49:37,960 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:49:37,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-02 22:49:37,960 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting dll_insert_masterErr4REQUIRES_VIOLATION === [inspect_initErr0REQUIRES_VIOLATION, inspect_initErr1REQUIRES_VIOLATION, inspect_initErr2REQUIRES_VIOLATION, inspect_initErr3REQUIRES_VIOLATION (and 94 more)] === [2021-11-02 22:49:37,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:49:37,961 INFO L85 PathProgramCache]: Analyzing trace with hash 704398157, now seen corresponding path program 1 times [2021-11-02 22:49:37,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:49:37,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945458952] [2021-11-02 22:49:37,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:49:37,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:49:37,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:38,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:49:38,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:38,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-02 22:49:38,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:38,570 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 22:49:38,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:49:38,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945458952] [2021-11-02 22:49:38,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945458952] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:49:38,571 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:49:38,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-11-02 22:49:38,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608745974] [2021-11-02 22:49:38,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-02 22:49:38,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:49:38,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-02 22:49:38,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-11-02 22:49:38,572 INFO L87 Difference]: Start difference. First operand 327 states and 374 transitions. Second operand has 15 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 11 states have internal predecessors, (19), 4 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-02 22:49:41,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:49:41,080 INFO L93 Difference]: Finished difference Result 386 states and 443 transitions. [2021-11-02 22:49:41,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-02 22:49:41,081 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 11 states have internal predecessors, (19), 4 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2021-11-02 22:49:41,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:49:41,083 INFO L225 Difference]: With dead ends: 386 [2021-11-02 22:49:41,083 INFO L226 Difference]: Without dead ends: 386 [2021-11-02 22:49:41,084 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-11-02 22:49:41,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-11-02 22:49:41,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 336. [2021-11-02 22:49:41,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 183 states have (on average 1.6666666666666667) internal successors, (305), 285 states have internal predecessors, (305), 47 states have call successors, (47), 25 states have call predecessors, (47), 20 states have return successors, (37), 28 states have call predecessors, (37), 32 states have call successors, (37) [2021-11-02 22:49:41,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 389 transitions. [2021-11-02 22:49:41,095 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 389 transitions. Word has length 28 [2021-11-02 22:49:41,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:49:41,096 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 389 transitions. [2021-11-02 22:49:41,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 11 states have internal predecessors, (19), 4 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-02 22:49:41,096 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 389 transitions. [2021-11-02 22:49:41,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-02 22:49:41,097 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:49:41,098 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:49:41,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-02 22:49:41,098 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting dll_insert_slaveErr0REQUIRES_VIOLATION === [inspect_initErr0REQUIRES_VIOLATION, inspect_initErr1REQUIRES_VIOLATION, inspect_initErr2REQUIRES_VIOLATION, inspect_initErr3REQUIRES_VIOLATION (and 94 more)] === [2021-11-02 22:49:41,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:49:41,099 INFO L85 PathProgramCache]: Analyzing trace with hash 600584847, now seen corresponding path program 1 times [2021-11-02 22:49:41,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:49:41,099 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018493029] [2021-11-02 22:49:41,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:49:41,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:49:41,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:41,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:49:41,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:41,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-02 22:49:41,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:41,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-11-02 22:49:41,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:41,270 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:49:41,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:49:41,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018493029] [2021-11-02 22:49:41,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018493029] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:49:41,273 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:49:41,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-02 22:49:41,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847774572] [2021-11-02 22:49:41,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-02 22:49:41,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:49:41,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-02 22:49:41,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:49:41,279 INFO L87 Difference]: Start difference. First operand 336 states and 389 transitions. Second operand has 11 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-02 22:49:42,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:49:42,602 INFO L93 Difference]: Finished difference Result 379 states and 437 transitions. [2021-11-02 22:49:42,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-02 22:49:42,603 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 45 [2021-11-02 22:49:42,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:49:42,605 INFO L225 Difference]: With dead ends: 379 [2021-11-02 22:49:42,606 INFO L226 Difference]: Without dead ends: 379 [2021-11-02 22:49:42,606 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-11-02 22:49:42,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-11-02 22:49:42,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 334. [2021-11-02 22:49:42,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 183 states have (on average 1.6557377049180328) internal successors, (303), 283 states have internal predecessors, (303), 47 states have call successors, (47), 25 states have call predecessors, (47), 20 states have return successors, (37), 28 states have call predecessors, (37), 32 states have call successors, (37) [2021-11-02 22:49:42,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 387 transitions. [2021-11-02 22:49:42,623 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 387 transitions. Word has length 45 [2021-11-02 22:49:42,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:49:42,623 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 387 transitions. [2021-11-02 22:49:42,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-02 22:49:42,624 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 387 transitions. [2021-11-02 22:49:42,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-02 22:49:42,624 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:49:42,625 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:49:42,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-02 22:49:42,625 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting dll_insert_slaveErr1REQUIRES_VIOLATION === [inspect_initErr0REQUIRES_VIOLATION, inspect_initErr1REQUIRES_VIOLATION, inspect_initErr2REQUIRES_VIOLATION, inspect_initErr3REQUIRES_VIOLATION (and 94 more)] === [2021-11-02 22:49:42,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:49:42,626 INFO L85 PathProgramCache]: Analyzing trace with hash 600584848, now seen corresponding path program 1 times [2021-11-02 22:49:42,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:49:42,626 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139022707] [2021-11-02 22:49:42,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:49:42,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:49:42,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:42,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:49:42,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:42,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-02 22:49:42,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:42,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-11-02 22:49:42,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:42,848 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:49:42,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:49:42,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139022707] [2021-11-02 22:49:42,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139022707] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:49:42,849 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:49:42,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-02 22:49:42,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670347576] [2021-11-02 22:49:42,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-02 22:49:42,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:49:42,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-02 22:49:42,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-11-02 22:49:42,851 INFO L87 Difference]: Start difference. First operand 334 states and 387 transitions. Second operand has 12 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 4 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-02 22:49:44,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:49:44,442 INFO L93 Difference]: Finished difference Result 394 states and 455 transitions. [2021-11-02 22:49:44,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-02 22:49:44,443 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 4 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 45 [2021-11-02 22:49:44,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:49:44,445 INFO L225 Difference]: With dead ends: 394 [2021-11-02 22:49:44,445 INFO L226 Difference]: Without dead ends: 394 [2021-11-02 22:49:44,446 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-11-02 22:49:44,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-11-02 22:49:44,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 346. [2021-11-02 22:49:44,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 192 states have (on average 1.6510416666666667) internal successors, (317), 293 states have internal predecessors, (317), 49 states have call successors, (49), 26 states have call predecessors, (49), 21 states have return successors, (39), 29 states have call predecessors, (39), 34 states have call successors, (39) [2021-11-02 22:49:44,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 405 transitions. [2021-11-02 22:49:44,458 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 405 transitions. Word has length 45 [2021-11-02 22:49:44,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:49:44,459 INFO L470 AbstractCegarLoop]: Abstraction has 346 states and 405 transitions. [2021-11-02 22:49:44,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 4 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-02 22:49:44,459 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 405 transitions. [2021-11-02 22:49:44,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-02 22:49:44,460 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:49:44,460 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:49:44,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-02 22:49:44,460 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting dll_insert_slaveErr2REQUIRES_VIOLATION === [inspect_initErr0REQUIRES_VIOLATION, inspect_initErr1REQUIRES_VIOLATION, inspect_initErr2REQUIRES_VIOLATION, inspect_initErr3REQUIRES_VIOLATION (and 94 more)] === [2021-11-02 22:49:44,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:49:44,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1636427120, now seen corresponding path program 1 times [2021-11-02 22:49:44,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:49:44,461 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049895150] [2021-11-02 22:49:44,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:49:44,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:49:44,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:44,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:49:44,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:44,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-02 22:49:44,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:44,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-11-02 22:49:44,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:44,587 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 22:49:44,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:49:44,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049895150] [2021-11-02 22:49:44,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049895150] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:49:44,588 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:49:44,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 22:49:44,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400188152] [2021-11-02 22:49:44,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 22:49:44,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:49:44,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 22:49:44,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:49:44,590 INFO L87 Difference]: Start difference. First operand 346 states and 405 transitions. Second operand has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 5 states have internal predecessors, (30), 1 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-02 22:49:45,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:49:45,512 INFO L93 Difference]: Finished difference Result 389 states and 453 transitions. [2021-11-02 22:49:45,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:49:45,513 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 5 states have internal predecessors, (30), 1 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 47 [2021-11-02 22:49:45,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:49:45,515 INFO L225 Difference]: With dead ends: 389 [2021-11-02 22:49:45,515 INFO L226 Difference]: Without dead ends: 389 [2021-11-02 22:49:45,516 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 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 22:49:45,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-11-02 22:49:45,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 345. [2021-11-02 22:49:45,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 192 states have (on average 1.640625) internal successors, (315), 292 states have internal predecessors, (315), 49 states have call successors, (49), 26 states have call predecessors, (49), 21 states have return successors, (39), 29 states have call predecessors, (39), 34 states have call successors, (39) [2021-11-02 22:49:45,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 403 transitions. [2021-11-02 22:49:45,536 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 403 transitions. Word has length 47 [2021-11-02 22:49:45,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:49:45,539 INFO L470 AbstractCegarLoop]: Abstraction has 345 states and 403 transitions. [2021-11-02 22:49:45,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 5 states have internal predecessors, (30), 1 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-02 22:49:45,540 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 403 transitions. [2021-11-02 22:49:45,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-02 22:49:45,541 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:49:45,541 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:49:45,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-02 22:49:45,541 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting dll_insert_slaveErr3REQUIRES_VIOLATION === [inspect_initErr0REQUIRES_VIOLATION, inspect_initErr1REQUIRES_VIOLATION, inspect_initErr2REQUIRES_VIOLATION, inspect_initErr3REQUIRES_VIOLATION (and 94 more)] === [2021-11-02 22:49:45,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:49:45,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1636427121, now seen corresponding path program 1 times [2021-11-02 22:49:45,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:49:45,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197418074] [2021-11-02 22:49:45,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:49:45,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:49:45,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:45,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:49:45,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:45,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-02 22:49:45,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:45,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-11-02 22:49:45,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:45,681 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 22:49:45,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:49:45,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197418074] [2021-11-02 22:49:45,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197418074] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:49:45,682 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:49:45,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 22:49:45,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374159747] [2021-11-02 22:49:45,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 22:49:45,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:49:45,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 22:49:45,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:49:45,684 INFO L87 Difference]: Start difference. First operand 345 states and 403 transitions. Second operand has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 5 states have internal predecessors, (30), 1 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-02 22:49:46,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:49:46,717 INFO L93 Difference]: Finished difference Result 388 states and 451 transitions. [2021-11-02 22:49:46,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:49:46,718 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 5 states have internal predecessors, (30), 1 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 47 [2021-11-02 22:49:46,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:49:46,720 INFO L225 Difference]: With dead ends: 388 [2021-11-02 22:49:46,720 INFO L226 Difference]: Without dead ends: 388 [2021-11-02 22:49:46,721 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 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 22:49:46,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-11-02 22:49:46,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 344. [2021-11-02 22:49:46,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 192 states have (on average 1.6302083333333333) internal successors, (313), 291 states have internal predecessors, (313), 49 states have call successors, (49), 26 states have call predecessors, (49), 21 states have return successors, (39), 29 states have call predecessors, (39), 34 states have call successors, (39) [2021-11-02 22:49:46,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 401 transitions. [2021-11-02 22:49:46,733 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 401 transitions. Word has length 47 [2021-11-02 22:49:46,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:49:46,734 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 401 transitions. [2021-11-02 22:49:46,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 5 states have internal predecessors, (30), 1 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-02 22:49:46,734 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 401 transitions. [2021-11-02 22:49:46,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-02 22:49:46,735 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:49:46,735 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:49:46,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-02 22:49:46,735 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting dll_insert_slaveErr4REQUIRES_VIOLATION === [inspect_initErr0REQUIRES_VIOLATION, inspect_initErr1REQUIRES_VIOLATION, inspect_initErr2REQUIRES_VIOLATION, inspect_initErr3REQUIRES_VIOLATION (and 94 more)] === [2021-11-02 22:49:46,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:49:46,736 INFO L85 PathProgramCache]: Analyzing trace with hash 648438993, now seen corresponding path program 1 times [2021-11-02 22:49:46,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:49:46,736 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368046065] [2021-11-02 22:49:46,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:49:46,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:49:46,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:46,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:49:46,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:46,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-02 22:49:46,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:46,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-11-02 22:49:46,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:47,147 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:49:47,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:49:47,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368046065] [2021-11-02 22:49:47,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368046065] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:49:47,148 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:49:47,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-11-02 22:49:47,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549649534] [2021-11-02 22:49:47,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-02 22:49:47,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:49:47,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-02 22:49:47,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-11-02 22:49:47,150 INFO L87 Difference]: Start difference. First operand 344 states and 401 transitions. Second operand has 15 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 4 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-02 22:49:49,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:49:49,172 INFO L93 Difference]: Finished difference Result 391 states and 451 transitions. [2021-11-02 22:49:49,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-02 22:49:49,173 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 4 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 49 [2021-11-02 22:49:49,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:49:49,177 INFO L225 Difference]: With dead ends: 391 [2021-11-02 22:49:49,178 INFO L226 Difference]: Without dead ends: 391 [2021-11-02 22:49:49,178 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-11-02 22:49:49,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-11-02 22:49:49,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 343. [2021-11-02 22:49:49,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 191 states have (on average 1.617801047120419) internal successors, (309), 290 states have internal predecessors, (309), 49 states have call successors, (49), 26 states have call predecessors, (49), 21 states have return successors, (39), 29 states have call predecessors, (39), 34 states have call successors, (39) [2021-11-02 22:49:49,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 397 transitions. [2021-11-02 22:49:49,190 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 397 transitions. Word has length 49 [2021-11-02 22:49:49,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:49:49,190 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 397 transitions. [2021-11-02 22:49:49,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 4 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-02 22:49:49,191 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 397 transitions. [2021-11-02 22:49:49,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-02 22:49:49,192 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:49:49,192 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:49:49,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-02 22:49:49,192 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting dll_insert_slaveErr1REQUIRES_VIOLATION === [inspect_initErr0REQUIRES_VIOLATION, inspect_initErr1REQUIRES_VIOLATION, inspect_initErr2REQUIRES_VIOLATION, inspect_initErr3REQUIRES_VIOLATION (and 94 more)] === [2021-11-02 22:49:49,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:49:49,193 INFO L85 PathProgramCache]: Analyzing trace with hash -195659428, now seen corresponding path program 1 times [2021-11-02 22:49:49,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:49:49,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237770978] [2021-11-02 22:49:49,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:49:49,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:49:49,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:49,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:49:49,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:49,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-02 22:49:49,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:49,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-02 22:49:49,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:49,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:49:49,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:49,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-02 22:49:49,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:49,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-11-02 22:49:49,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:49,595 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 22:49:49,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:49:49,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237770978] [2021-11-02 22:49:49,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237770978] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:49:49,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243611938] [2021-11-02 22:49:49,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:49:49,596 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:49:49,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c211dea9-a2b4-4526-951d-810198c02b6b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:49:49,602 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c211dea9-a2b4-4526-951d-810198c02b6b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:49:49,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c211dea9-a2b4-4526-951d-810198c02b6b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 22:49:49,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:49,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-02 22:49:49,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:49:50,351 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-02 22:49:50,352 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 22:49:50,361 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 22:49:50,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-11-02 22:49:50,435 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 22:49:50,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243611938] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:49:50,436 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:49:50,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 20 [2021-11-02 22:49:50,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770769427] [2021-11-02 22:49:50,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-02 22:49:50,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:49:50,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-02 22:49:50,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-11-02 22:49:50,439 INFO L87 Difference]: Start difference. First operand 343 states and 397 transitions. Second operand has 21 states, 17 states have (on average 3.823529411764706) internal successors, (65), 15 states have internal predecessors, (65), 7 states have call successors, (21), 6 states have call predecessors, (21), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-02 22:49:53,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:49:53,196 INFO L93 Difference]: Finished difference Result 385 states and 444 transitions. [2021-11-02 22:49:53,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-02 22:49:53,196 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 3.823529411764706) internal successors, (65), 15 states have internal predecessors, (65), 7 states have call successors, (21), 6 states have call predecessors, (21), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 68 [2021-11-02 22:49:53,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:49:53,199 INFO L225 Difference]: With dead ends: 385 [2021-11-02 22:49:53,199 INFO L226 Difference]: Without dead ends: 385 [2021-11-02 22:49:53,199 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=148, Invalid=844, Unknown=0, NotChecked=0, Total=992 [2021-11-02 22:49:53,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-11-02 22:49:53,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 341. [2021-11-02 22:49:53,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 191 states have (on average 1.6020942408376964) internal successors, (306), 288 states have internal predecessors, (306), 49 states have call successors, (49), 26 states have call predecessors, (49), 21 states have return successors, (39), 29 states have call predecessors, (39), 34 states have call successors, (39) [2021-11-02 22:49:53,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 394 transitions. [2021-11-02 22:49:53,210 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 394 transitions. Word has length 68 [2021-11-02 22:49:53,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:49:53,211 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 394 transitions. [2021-11-02 22:49:53,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 3.823529411764706) internal successors, (65), 15 states have internal predecessors, (65), 7 states have call successors, (21), 6 states have call predecessors, (21), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-02 22:49:53,211 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 394 transitions. [2021-11-02 22:49:53,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-02 22:49:53,212 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:49:53,213 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:49:53,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c211dea9-a2b4-4526-951d-810198c02b6b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 22:49:53,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c211dea9-a2b4-4526-951d-810198c02b6b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:49:53,429 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting dll_insert_masterErr1REQUIRES_VIOLATION === [inspect_initErr0REQUIRES_VIOLATION, inspect_initErr1REQUIRES_VIOLATION, inspect_initErr2REQUIRES_VIOLATION, inspect_initErr3REQUIRES_VIOLATION (and 94 more)] === [2021-11-02 22:49:53,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:49:53,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1275938973, now seen corresponding path program 1 times [2021-11-02 22:49:53,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:49:53,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617844843] [2021-11-02 22:49:53,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:49:53,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:49:53,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:53,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:49:53,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:53,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-02 22:49:53,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:53,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-02 22:49:53,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:53,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:49:53,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:53,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-02 22:49:53,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:53,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-11-02 22:49:53,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:53,621 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-02 22:49:53,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:49:53,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617844843] [2021-11-02 22:49:53,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617844843] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:49:53,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295662675] [2021-11-02 22:49:53,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:49:53,623 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:49:53,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c211dea9-a2b4-4526-951d-810198c02b6b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:49:53,625 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c211dea9-a2b4-4526-951d-810198c02b6b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:49:53,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c211dea9-a2b4-4526-951d-810198c02b6b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-02 22:49:53,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:53,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 22:49:53,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:49:54,047 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 22:49:54,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295662675] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:49:54,047 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:49:54,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 7 [2021-11-02 22:49:54,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431679786] [2021-11-02 22:49:54,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:49:54,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:49:54,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:49:54,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:49:54,053 INFO L87 Difference]: Start difference. First operand 341 states and 394 transitions. Second operand has 5 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 3 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-02 22:49:54,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:49:54,090 INFO L93 Difference]: Finished difference Result 331 states and 370 transitions. [2021-11-02 22:49:54,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:49:54,091 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 3 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 69 [2021-11-02 22:49:54,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:49:54,093 INFO L225 Difference]: With dead ends: 331 [2021-11-02 22:49:54,093 INFO L226 Difference]: Without dead ends: 331 [2021-11-02 22:49:54,093 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:49:54,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-11-02 22:49:54,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 331. [2021-11-02 22:49:54,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 185 states have (on average 1.5891891891891892) internal successors, (294), 282 states have internal predecessors, (294), 45 states have call successors, (45), 25 states have call predecessors, (45), 21 states have return successors, (31), 26 states have call predecessors, (31), 30 states have call successors, (31) [2021-11-02 22:49:54,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 370 transitions. [2021-11-02 22:49:54,114 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 370 transitions. Word has length 69 [2021-11-02 22:49:54,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:49:54,114 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 370 transitions. [2021-11-02 22:49:54,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 3 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-02 22:49:54,115 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 370 transitions. [2021-11-02 22:49:54,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-02 22:49:54,116 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:49:54,116 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:49:54,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c211dea9-a2b4-4526-951d-810198c02b6b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-02 22:49:54,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c211dea9-a2b4-4526-951d-810198c02b6b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-02 22:49:54,337 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting dll_insert_slaveErr4REQUIRES_VIOLATION === [inspect_initErr0REQUIRES_VIOLATION, inspect_initErr1REQUIRES_VIOLATION, inspect_initErr2REQUIRES_VIOLATION, inspect_initErr3REQUIRES_VIOLATION (and 94 more)] === [2021-11-02 22:49:54,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:49:54,337 INFO L85 PathProgramCache]: Analyzing trace with hash -2015861347, now seen corresponding path program 1 times [2021-11-02 22:49:54,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:49:54,338 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640021355] [2021-11-02 22:49:54,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:49:54,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:49:54,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:54,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:49:54,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:54,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-02 22:49:54,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:54,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-02 22:49:54,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:54,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:49:54,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:54,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-02 22:49:54,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:54,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-11-02 22:49:54,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:54,927 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 22:49:54,927 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:49:54,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640021355] [2021-11-02 22:49:54,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640021355] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:49:54,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836340975] [2021-11-02 22:49:54,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:49:54,928 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:49:54,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c211dea9-a2b4-4526-951d-810198c02b6b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:49:54,929 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c211dea9-a2b4-4526-951d-810198c02b6b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:49:54,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c211dea9-a2b4-4526-951d-810198c02b6b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-02 22:49:55,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:55,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-02 22:49:55,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:49:55,417 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 22:49:55,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-02 22:49:56,174 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [dll_insert_slave_~dll.offset] [2021-11-02 22:49:56,175 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:49:56,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-11-02 22:49:56,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075923096] [2021-11-02 22:49:56,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-02 22:49:56,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:49:56,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-02 22:49:56,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1033, Unknown=0, NotChecked=0, Total=1122 [2021-11-02 22:49:56,176 INFO L87 Difference]: Start difference. First operand 331 states and 370 transitions. Second operand has 22 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 18 states have internal predecessors, (50), 6 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-02 22:50:00,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:50:00,160 INFO L93 Difference]: Finished difference Result 374 states and 419 transitions. [2021-11-02 22:50:00,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-02 22:50:00,161 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 18 states have internal predecessors, (50), 6 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 72 [2021-11-02 22:50:00,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:50:00,164 INFO L225 Difference]: With dead ends: 374 [2021-11-02 22:50:00,164 INFO L226 Difference]: Without dead ends: 374 [2021-11-02 22:50:00,165 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=278, Invalid=2584, Unknown=0, NotChecked=0, Total=2862 [2021-11-02 22:50:00,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-11-02 22:50:00,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 330. [2021-11-02 22:50:00,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 185 states have (on average 1.5837837837837838) internal successors, (293), 281 states have internal predecessors, (293), 45 states have call successors, (45), 25 states have call predecessors, (45), 21 states have return successors, (31), 26 states have call predecessors, (31), 30 states have call successors, (31) [2021-11-02 22:50:00,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 369 transitions. [2021-11-02 22:50:00,175 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 369 transitions. Word has length 72 [2021-11-02 22:50:00,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:50:00,175 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 369 transitions. [2021-11-02 22:50:00,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 18 states have internal predecessors, (50), 6 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-02 22:50:00,176 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 369 transitions. [2021-11-02 22:50:00,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-02 22:50:00,177 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:50:00,177 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:50:00,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c211dea9-a2b4-4526-951d-810198c02b6b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-02 22:50:00,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c211dea9-a2b4-4526-951d-810198c02b6b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:50:00,401 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting dll_insert_slaveErr5REQUIRES_VIOLATION === [inspect_initErr0REQUIRES_VIOLATION, inspect_initErr1REQUIRES_VIOLATION, inspect_initErr2REQUIRES_VIOLATION, inspect_initErr3REQUIRES_VIOLATION (and 94 more)] === [2021-11-02 22:50:00,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:50:00,401 INFO L85 PathProgramCache]: Analyzing trace with hash -2015861346, now seen corresponding path program 1 times [2021-11-02 22:50:00,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:50:00,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137110464] [2021-11-02 22:50:00,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:50:00,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:50:00,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:50:00,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:50:00,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:50:00,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-02 22:50:00,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:50:00,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-02 22:50:00,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:50:00,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:50:00,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:50:00,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-02 22:50:00,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:50:00,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-11-02 22:50:00,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:50:01,220 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 22:50:01,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:50:01,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137110464] [2021-11-02 22:50:01,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137110464] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:50:01,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798803611] [2021-11-02 22:50:01,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:50:01,220 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:50:01,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c211dea9-a2b4-4526-951d-810198c02b6b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:50:01,225 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c211dea9-a2b4-4526-951d-810198c02b6b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:50:01,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c211dea9-a2b4-4526-951d-810198c02b6b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-02 22:50:01,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:50:01,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 91 conjunts are in the unsatisfiable core [2021-11-02 22:50:01,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:50:01,714 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 22:50:01,719 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 22:50:02,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-02 22:50:02,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-02 22:50:02,740 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 36 treesize of output 28 [2021-11-02 22:50:02,745 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 18 treesize of output 10 [2021-11-02 22:50:05,202 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-02 22:50:05,202 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 71 treesize of output 66 [2021-11-02 22:50:05,228 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-02 22:50:05,229 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 67 treesize of output 62 [2021-11-02 22:50:05,240 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-02 22:50:05,241 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 63 treesize of output 63 [2021-11-02 22:50:05,260 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-02 22:50:05,260 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 57 treesize of output 59 [2021-11-02 22:50:05,479 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-02 22:50:05,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 54 [2021-11-02 22:50:05,487 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-02 22:50:05,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 32 [2021-11-02 22:50:05,738 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 22:50:05,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798803611] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:50:05,739 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:50:05,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23] total 41 [2021-11-02 22:50:05,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451208883] [2021-11-02 22:50:05,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-02 22:50:05,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:50:05,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-02 22:50:05,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1610, Unknown=1, NotChecked=0, Total=1722 [2021-11-02 22:50:05,741 INFO L87 Difference]: Start difference. First operand 330 states and 369 transitions. Second operand has 42 states, 35 states have (on average 2.4) internal successors, (84), 33 states have internal predecessors, (84), 10 states have call successors, (23), 8 states have call predecessors, (23), 9 states have return successors, (10), 9 states have call predecessors, (10), 6 states have call successors, (10) [2021-11-02 22:50:20,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:50:20,165 INFO L93 Difference]: Finished difference Result 375 states and 419 transitions. [2021-11-02 22:50:20,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-02 22:50:20,166 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 35 states have (on average 2.4) internal successors, (84), 33 states have internal predecessors, (84), 10 states have call successors, (23), 8 states have call predecessors, (23), 9 states have return successors, (10), 9 states have call predecessors, (10), 6 states have call successors, (10) Word has length 72 [2021-11-02 22:50:20,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:50:20,169 INFO L225 Difference]: With dead ends: 375 [2021-11-02 22:50:20,169 INFO L226 Difference]: Without dead ends: 375 [2021-11-02 22:50:20,171 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 769 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=367, Invalid=3921, Unknown=2, NotChecked=0, Total=4290 [2021-11-02 22:50:20,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-11-02 22:50:20,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 331. [2021-11-02 22:50:20,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 186 states have (on average 1.575268817204301) internal successors, (293), 281 states have internal predecessors, (293), 45 states have call successors, (45), 25 states have call predecessors, (45), 22 states have return successors, (31), 27 states have call predecessors, (31), 30 states have call successors, (31) [2021-11-02 22:50:20,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 369 transitions. [2021-11-02 22:50:20,184 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 369 transitions. Word has length 72 [2021-11-02 22:50:20,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:50:20,184 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 369 transitions. [2021-11-02 22:50:20,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 35 states have (on average 2.4) internal successors, (84), 33 states have internal predecessors, (84), 10 states have call successors, (23), 8 states have call predecessors, (23), 9 states have return successors, (10), 9 states have call predecessors, (10), 6 states have call successors, (10) [2021-11-02 22:50:20,185 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 369 transitions. [2021-11-02 22:50:20,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-02 22:50:20,188 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:50:20,188 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:50:20,218 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c211dea9-a2b4-4526-951d-810198c02b6b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-02 22:50:20,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c211dea9-a2b4-4526-951d-810198c02b6b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:50:20,405 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting dll_insert_masterErr6REQUIRES_VIOLATION === [inspect_initErr0REQUIRES_VIOLATION, inspect_initErr1REQUIRES_VIOLATION, inspect_initErr2REQUIRES_VIOLATION, inspect_initErr3REQUIRES_VIOLATION (and 94 more)] === [2021-11-02 22:50:20,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:50:20,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1172416197, now seen corresponding path program 1 times [2021-11-02 22:50:20,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:50:20,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948896693] [2021-11-02 22:50:20,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:50:20,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:50:20,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:50:20,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:50:20,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:50:20,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-02 22:50:20,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:50:20,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-02 22:50:20,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:50:20,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:50:20,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:50:20,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-02 22:50:20,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:50:20,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:50:20,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:50:20,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-02 22:50:20,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:50:20,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-02 22:50:20,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:50:21,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:50:21,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:50:21,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-02 22:50:21,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:50:21,504 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 22:50:21,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:50:21,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948896693] [2021-11-02 22:50:21,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948896693] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:50:21,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930758517] [2021-11-02 22:50:21,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:50:21,506 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:50:21,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c211dea9-a2b4-4526-951d-810198c02b6b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:50:21,509 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c211dea9-a2b4-4526-951d-810198c02b6b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:50:21,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c211dea9-a2b4-4526-951d-810198c02b6b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-02 22:50:21,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:50:21,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 65 conjunts are in the unsatisfiable core [2021-11-02 22:50:21,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:50:22,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-02 22:50:22,309 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 12 treesize of output 8 [2021-11-02 22:50:30,512 WARN L860 $PredicateComparison]: unable to prove that (exists ((alloc_or_die_slave_~ptr~0.offset Int) (dll_insert_slave_~item~0.base Int)) (and (= c_dll_insert_slave_~next~0.base (select (select (store |c_old(#memory_$Pointer$.base)| dll_insert_slave_~item~0.base (store (select |c_old(#memory_$Pointer$.base)| dll_insert_slave_~item~0.base) alloc_or_die_slave_~ptr~0.offset 0)) |c_dll_insert_slave_#in~dll.base|) |c_dll_insert_slave_#in~dll.offset|)) (< dll_insert_slave_~item~0.base |c_#StackHeapBarrier|))) is different from true [2021-11-02 22:50:32,532 WARN L860 $PredicateComparison]: unable to prove that (exists ((alloc_or_die_slave_~ptr~0.offset Int) (dll_insert_slave_~item~0.base Int)) (and (= (select (select (store |c_old(#memory_$Pointer$.base)| dll_insert_slave_~item~0.base (store (select |c_old(#memory_$Pointer$.base)| dll_insert_slave_~item~0.base) alloc_or_die_slave_~ptr~0.offset 0)) |c_dll_insert_slave_#in~dll.base|) |c_dll_insert_slave_#in~dll.offset|) 0) (< dll_insert_slave_~item~0.base |c_#StackHeapBarrier|))) is different from true [2021-11-02 22:50:34,208 WARN L860 $PredicateComparison]: unable to prove that (exists ((alloc_or_die_slave_~ptr~0.offset Int) (dll_insert_slave_~item~0.base Int)) (and (= (select (select (store |c_old(#memory_$Pointer$.base)| dll_insert_slave_~item~0.base (store (select |c_old(#memory_$Pointer$.base)| dll_insert_slave_~item~0.base) alloc_or_die_slave_~ptr~0.offset 0)) |c_##fun~$Pointer$~TO~VOID_#in~12.base|) |c_##fun~$Pointer$~TO~VOID_#in~12.offset|) 0) (< dll_insert_slave_~item~0.base |c_#StackHeapBarrier|))) is different from true [2021-11-02 22:50:34,235 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 40 treesize of output 32 [2021-11-02 22:50:34,256 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 6 not checked. [2021-11-02 22:50:34,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930758517] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:50:34,256 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:50:34,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 44 [2021-11-02 22:50:34,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126967123] [2021-11-02 22:50:34,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-02 22:50:34,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:50:34,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-02 22:50:34,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1524, Unknown=4, NotChecked=240, Total=1892 [2021-11-02 22:50:34,259 INFO L87 Difference]: Start difference. First operand 331 states and 369 transitions. Second operand has 44 states, 38 states have (on average 2.3947368421052633) internal successors, (91), 37 states have internal predecessors, (91), 11 states have call successors, (25), 4 states have call predecessors, (25), 13 states have return successors, (16), 11 states have call predecessors, (16), 11 states have call successors, (16) [2021-11-02 22:51:32,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:51:32,940 INFO L93 Difference]: Finished difference Result 378 states and 421 transitions. [2021-11-02 22:51:32,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-02 22:51:32,940 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 38 states have (on average 2.3947368421052633) internal successors, (91), 37 states have internal predecessors, (91), 11 states have call successors, (25), 4 states have call predecessors, (25), 13 states have return successors, (16), 11 states have call predecessors, (16), 11 states have call successors, (16) Word has length 86 [2021-11-02 22:51:32,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:51:32,942 INFO L225 Difference]: With dead ends: 378 [2021-11-02 22:51:32,942 INFO L226 Difference]: Without dead ends: 375 [2021-11-02 22:51:32,944 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 83 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 952 ImplicationChecksByTransitivity, 58.0s TimeCoverageRelationStatistics Valid=380, Invalid=4178, Unknown=10, NotChecked=402, Total=4970 [2021-11-02 22:51:32,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-11-02 22:51:32,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 331. [2021-11-02 22:51:32,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 186 states have (on average 1.5698924731182795) internal successors, (292), 281 states have internal predecessors, (292), 45 states have call successors, (45), 25 states have call predecessors, (45), 22 states have return successors, (31), 27 states have call predecessors, (31), 30 states have call successors, (31) [2021-11-02 22:51:32,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 368 transitions. [2021-11-02 22:51:32,954 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 368 transitions. Word has length 86 [2021-11-02 22:51:32,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:51:32,955 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 368 transitions. [2021-11-02 22:51:32,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 38 states have (on average 2.3947368421052633) internal successors, (91), 37 states have internal predecessors, (91), 11 states have call successors, (25), 4 states have call predecessors, (25), 13 states have return successors, (16), 11 states have call predecessors, (16), 11 states have call successors, (16) [2021-11-02 22:51:32,955 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 368 transitions. [2021-11-02 22:51:32,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-02 22:51:32,956 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:51:32,956 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:51:32,984 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c211dea9-a2b4-4526-951d-810198c02b6b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-02 22:51:33,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c211dea9-a2b4-4526-951d-810198c02b6b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-02 22:51:33,169 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting dll_insert_masterErr6REQUIRES_VIOLATION === [inspect_initErr0REQUIRES_VIOLATION, inspect_initErr1REQUIRES_VIOLATION, inspect_initErr2REQUIRES_VIOLATION, inspect_initErr3REQUIRES_VIOLATION (and 94 more)] === [2021-11-02 22:51:33,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:51:33,169 INFO L85 PathProgramCache]: Analyzing trace with hash 745135916, now seen corresponding path program 1 times [2021-11-02 22:51:33,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:51:33,170 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477049702] [2021-11-02 22:51:33,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:51:33,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:51:33,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:51:33,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:51:33,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:51:33,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-02 22:51:33,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:51:33,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-02 22:51:33,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:51:33,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:51:33,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:51:44,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-02 22:51:44,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:51:44,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:51:44,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:51:44,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-02 22:51:44,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:51:45,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-02 22:51:45,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:51:45,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:51:45,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:51:46,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-02 22:51:46,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:51:46,668 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 22:51:46,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:51:46,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477049702] [2021-11-02 22:51:46,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477049702] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:51:46,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733317526] [2021-11-02 22:51:46,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:51:46,669 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:51:46,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c211dea9-a2b4-4526-951d-810198c02b6b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:51:46,669 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c211dea9-a2b4-4526-951d-810198c02b6b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:51:46,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c211dea9-a2b4-4526-951d-810198c02b6b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-02 22:51:47,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:51:47,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-02 22:51:47,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:51:47,290 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 22:51:47,537 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 9 treesize of output 7 [2021-11-02 22:51:47,685 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 9 treesize of output 7 [2021-11-02 22:51:48,298 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-02 22:51:48,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 14 [2021-11-02 22:51:49,345 INFO L354 Elim1Store]: treesize reduction 109, result has 18.0 percent of original size [2021-11-02 22:51:49,345 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 7 case distinctions, treesize of input 40 treesize of output 47 [2021-11-02 22:51:49,452 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-02 22:51:49,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733317526] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:51:49,453 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:51:49,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 20] total 55 [2021-11-02 22:51:49,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446826269] [2021-11-02 22:51:49,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-02 22:51:49,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:51:49,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-02 22:51:49,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=2847, Unknown=0, NotChecked=0, Total=3080 [2021-11-02 22:51:49,456 INFO L87 Difference]: Start difference. First operand 331 states and 368 transitions. Second operand has 56 states, 48 states have (on average 2.4375) internal successors, (117), 46 states have internal predecessors, (117), 14 states have call successors, (24), 4 states have call predecessors, (24), 17 states have return successors, (19), 19 states have call predecessors, (19), 14 states have call successors, (19) [2021-11-02 22:52:02,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:52:02,937 INFO L93 Difference]: Finished difference Result 427 states and 483 transitions. [2021-11-02 22:52:02,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-02 22:52:02,938 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 48 states have (on average 2.4375) internal successors, (117), 46 states have internal predecessors, (117), 14 states have call successors, (24), 4 states have call predecessors, (24), 17 states have return successors, (19), 19 states have call predecessors, (19), 14 states have call successors, (19) Word has length 87 [2021-11-02 22:52:02,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:52:02,940 INFO L225 Difference]: With dead ends: 427 [2021-11-02 22:52:02,940 INFO L226 Difference]: Without dead ends: 427 [2021-11-02 22:52:02,943 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1827 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=575, Invalid=7257, Unknown=0, NotChecked=0, Total=7832 [2021-11-02 22:52:02,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-11-02 22:52:02,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 342. [2021-11-02 22:52:02,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 195 states have (on average 1.558974358974359) internal successors, (304), 288 states have internal predecessors, (304), 45 states have call successors, (45), 25 states have call predecessors, (45), 24 states have return successors, (34), 31 states have call predecessors, (34), 30 states have call successors, (34) [2021-11-02 22:52:02,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 383 transitions. [2021-11-02 22:52:02,954 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 383 transitions. Word has length 87 [2021-11-02 22:52:02,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:52:02,954 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 383 transitions. [2021-11-02 22:52:02,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 48 states have (on average 2.4375) internal successors, (117), 46 states have internal predecessors, (117), 14 states have call successors, (24), 4 states have call predecessors, (24), 17 states have return successors, (19), 19 states have call predecessors, (19), 14 states have call successors, (19) [2021-11-02 22:52:02,955 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 383 transitions. [2021-11-02 22:52:02,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-02 22:52:02,956 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:52:02,956 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:52:02,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c211dea9-a2b4-4526-951d-810198c02b6b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-02 22:52:03,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c211dea9-a2b4-4526-951d-810198c02b6b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:52:03,169 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting dll_insert_masterErr7REQUIRES_VIOLATION === [inspect_initErr0REQUIRES_VIOLATION, inspect_initErr1REQUIRES_VIOLATION, inspect_initErr2REQUIRES_VIOLATION, inspect_initErr3REQUIRES_VIOLATION (and 94 more)] === [2021-11-02 22:52:03,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:52:03,170 INFO L85 PathProgramCache]: Analyzing trace with hash 745135917, now seen corresponding path program 1 times [2021-11-02 22:52:03,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:52:03,170 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466537145] [2021-11-02 22:52:03,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:52:03,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:52:03,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:52:03,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:52:03,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:52:03,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-02 22:52:03,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:52:03,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-02 22:52:03,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:52:03,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:52:03,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:51,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-02 22:54:51,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:52,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:54:52,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:52,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-02 22:54:52,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:52,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-02 22:54:52,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:53,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:54:53,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:53,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-02 22:54:53,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:53,717 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 22:54:53,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:54:53,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466537145] [2021-11-02 22:54:53,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466537145] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:54:53,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576183157] [2021-11-02 22:54:53,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:54:53,718 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:54:53,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c211dea9-a2b4-4526-951d-810198c02b6b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:54:53,725 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c211dea9-a2b4-4526-951d-810198c02b6b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:54:53,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c211dea9-a2b4-4526-951d-810198c02b6b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-02 22:54:56,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:56,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 95 conjunts are in the unsatisfiable core [2021-11-02 22:54:56,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:54:56,593 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 22:54:57,040 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 14 treesize of output 12 [2021-11-02 22:54:57,044 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 9 treesize of output 7 [2021-11-02 22:54:57,157 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 9 treesize of output 7 [2021-11-02 22:54:58,194 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-02 22:54:58,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 14 [2021-11-02 22:54:59,510 INFO L354 Elim1Store]: treesize reduction 93, result has 14.7 percent of original size [2021-11-02 22:54:59,510 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 3 case distinctions, treesize of input 54 treesize of output 60 [2021-11-02 22:54:59,519 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-11-02 22:54:59,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 60 treesize of output 52 [2021-11-02 22:54:59,679 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 22:54:59,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576183157] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:54:59,679 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:54:59,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 24] total 49 [2021-11-02 22:54:59,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113098645] [2021-11-02 22:54:59,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-02 22:54:59,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:54:59,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-02 22:54:59,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=2244, Unknown=0, NotChecked=0, Total=2450 [2021-11-02 22:54:59,682 INFO L87 Difference]: Start difference. First operand 342 states and 383 transitions. Second operand has 50 states, 42 states have (on average 2.8095238095238093) internal successors, (118), 40 states have internal predecessors, (118), 15 states have call successors, (25), 4 states have call predecessors, (25), 16 states have return successors, (19), 19 states have call predecessors, (19), 15 states have call successors, (19) [2021-11-02 22:55:09,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:55:09,469 INFO L93 Difference]: Finished difference Result 397 states and 446 transitions. [2021-11-02 22:55:09,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-02 22:55:09,469 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 42 states have (on average 2.8095238095238093) internal successors, (118), 40 states have internal predecessors, (118), 15 states have call successors, (25), 4 states have call predecessors, (25), 16 states have return successors, (19), 19 states have call predecessors, (19), 15 states have call successors, (19) Word has length 87 [2021-11-02 22:55:09,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:55:09,471 INFO L225 Difference]: With dead ends: 397 [2021-11-02 22:55:09,471 INFO L226 Difference]: Without dead ends: 397 [2021-11-02 22:55:09,473 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1041 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=363, Invalid=4193, Unknown=0, NotChecked=0, Total=4556 [2021-11-02 22:55:09,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-11-02 22:55:09,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 342. [2021-11-02 22:55:09,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 195 states have (on average 1.5487179487179488) internal successors, (302), 288 states have internal predecessors, (302), 45 states have call successors, (45), 25 states have call predecessors, (45), 24 states have return successors, (34), 31 states have call predecessors, (34), 30 states have call successors, (34) [2021-11-02 22:55:09,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 381 transitions. [2021-11-02 22:55:09,485 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 381 transitions. Word has length 87 [2021-11-02 22:55:09,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:55:09,485 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 381 transitions. [2021-11-02 22:55:09,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 42 states have (on average 2.8095238095238093) internal successors, (118), 40 states have internal predecessors, (118), 15 states have call successors, (25), 4 states have call predecessors, (25), 16 states have return successors, (19), 19 states have call predecessors, (19), 15 states have call successors, (19) [2021-11-02 22:55:09,486 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 381 transitions. [2021-11-02 22:55:09,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-02 22:55:09,487 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:55:09,487 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:55:09,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c211dea9-a2b4-4526-951d-810198c02b6b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-02 22:55:09,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c211dea9-a2b4-4526-951d-810198c02b6b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:55:09,701 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting dll_insert_masterErr8REQUIRES_VIOLATION === [inspect_initErr0REQUIRES_VIOLATION, inspect_initErr1REQUIRES_VIOLATION, inspect_initErr2REQUIRES_VIOLATION, inspect_initErr3REQUIRES_VIOLATION (and 94 more)] === [2021-11-02 22:55:09,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:55:09,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1183914419, now seen corresponding path program 1 times [2021-11-02 22:55:09,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:55:09,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010589805] [2021-11-02 22:55:09,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:55:09,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:55:09,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:09,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:55:09,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:09,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-02 22:55:09,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:09,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-02 22:55:09,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:10,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:55:10,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:13,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-02 22:55:13,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:14,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:55:14,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:14,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-02 22:55:14,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:14,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-02 22:55:14,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:15,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:55:15,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:16,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-02 22:55:16,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:17,050 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 22:55:17,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:55:17,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010589805] [2021-11-02 22:55:17,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010589805] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:55:17,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388999748] [2021-11-02 22:55:17,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:55:17,051 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:55:17,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c211dea9-a2b4-4526-951d-810198c02b6b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:55:17,051 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c211dea9-a2b4-4526-951d-810198c02b6b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:55:17,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c211dea9-a2b4-4526-951d-810198c02b6b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-02 22:55:19,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:19,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 87 conjunts are in the unsatisfiable core [2021-11-02 22:55:19,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:55:19,968 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 11 treesize of output 9 [2021-11-02 22:55:20,151 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 9 treesize of output 7 [2021-11-02 22:55:20,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-02 22:55:21,156 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-02 22:55:21,157 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 26 treesize of output 18 [2021-11-02 22:55:21,162 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 12 treesize of output 8 [2021-11-02 22:56:08,569 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 32 treesize of output 24 [2021-11-02 22:56:09,414 INFO L354 Elim1Store]: treesize reduction 113, result has 15.0 percent of original size [2021-11-02 22:56:09,414 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 7 case distinctions, treesize of input 45 treesize of output 48 [2021-11-02 22:56:09,843 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 8 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:56:09,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388999748] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:56:09,843 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:56:09,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 30] total 58 [2021-11-02 22:56:09,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013565973] [2021-11-02 22:56:09,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-11-02 22:56:09,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:56:09,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-11-02 22:56:09,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=3170, Unknown=21, NotChecked=0, Total=3422 [2021-11-02 22:56:09,846 INFO L87 Difference]: Start difference. First operand 342 states and 381 transitions. Second operand has 59 states, 50 states have (on average 2.2) internal successors, (110), 48 states have internal predecessors, (110), 16 states have call successors, (25), 7 states have call predecessors, (25), 15 states have return successors, (18), 18 states have call predecessors, (18), 14 states have call successors, (18) [2021-11-02 23:00:19,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:00:19,158 INFO L93 Difference]: Finished difference Result 409 states and 463 transitions. [2021-11-02 23:00:19,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-02 23:00:19,159 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 50 states have (on average 2.2) internal successors, (110), 48 states have internal predecessors, (110), 16 states have call successors, (25), 7 states have call predecessors, (25), 15 states have return successors, (18), 18 states have call predecessors, (18), 14 states have call successors, (18) Word has length 89 [2021-11-02 23:00:19,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:00:19,162 INFO L225 Difference]: With dead ends: 409 [2021-11-02 23:00:19,162 INFO L226 Difference]: Without dead ends: 409 [2021-11-02 23:00:19,165 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2086 ImplicationChecksByTransitivity, 119.1s TimeCoverageRelationStatistics Valid=618, Invalid=7890, Unknown=48, NotChecked=0, Total=8556 [2021-11-02 23:00:19,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2021-11-02 23:00:19,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 346. [2021-11-02 23:00:19,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 199 states have (on average 1.5477386934673367) internal successors, (308), 292 states have internal predecessors, (308), 45 states have call successors, (45), 25 states have call predecessors, (45), 24 states have return successors, (34), 31 states have call predecessors, (34), 30 states have call successors, (34) [2021-11-02 23:00:19,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 387 transitions. [2021-11-02 23:00:19,179 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 387 transitions. Word has length 89 [2021-11-02 23:00:19,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:00:19,180 INFO L470 AbstractCegarLoop]: Abstraction has 346 states and 387 transitions. [2021-11-02 23:00:19,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 50 states have (on average 2.2) internal successors, (110), 48 states have internal predecessors, (110), 16 states have call successors, (25), 7 states have call predecessors, (25), 15 states have return successors, (18), 18 states have call predecessors, (18), 14 states have call successors, (18) [2021-11-02 23:00:19,180 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 387 transitions. [2021-11-02 23:00:19,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-02 23:00:19,181 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:00:19,182 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:00:19,236 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c211dea9-a2b4-4526-951d-810198c02b6b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-02 23:00:19,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c211dea9-a2b4-4526-951d-810198c02b6b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-02 23:00:19,397 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting dll_insert_masterErr9REQUIRES_VIOLATION === [inspect_initErr0REQUIRES_VIOLATION, inspect_initErr1REQUIRES_VIOLATION, inspect_initErr2REQUIRES_VIOLATION, inspect_initErr3REQUIRES_VIOLATION (and 94 more)] === [2021-11-02 23:00:19,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:00:19,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1183914418, now seen corresponding path program 1 times [2021-11-02 23:00:19,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:00:19,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677851634] [2021-11-02 23:00:19,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:00:19,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:00:19,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:00:19,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 23:00:19,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:00:19,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-02 23:00:19,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:00:19,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-02 23:00:19,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:00:19,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 23:00:20,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat