./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-regression/stateful_check.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7246e5-a386-452d-bf73-b5a68ea11203/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7246e5-a386-452d-bf73-b5a68ea11203/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7246e5-a386-452d-bf73-b5a68ea11203/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7246e5-a386-452d-bf73-b5a68ea11203/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-regression/stateful_check.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7246e5-a386-452d-bf73-b5a68ea11203/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7246e5-a386-452d-bf73-b5a68ea11203/bin/utaipan-ByfvJB40ur --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 86e7865b5c88aae342720e4dde014f366638a0b48b0e0f6e55acb2c675bcac3e --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-26 00:31:16,287 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:31:16,290 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:31:16,332 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:31:16,333 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:31:16,337 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:31:16,339 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:31:16,344 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:31:16,346 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:31:16,352 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:31:16,353 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:31:16,355 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:31:16,356 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:31:16,359 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:31:16,360 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:31:16,363 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:31:16,364 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:31:16,366 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:31:16,367 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:31:16,374 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:31:16,376 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:31:16,378 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:31:16,380 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:31:16,381 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:31:16,391 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:31:16,391 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:31:16,391 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:31:16,393 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:31:16,394 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:31:16,395 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:31:16,395 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:31:16,398 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:31:16,400 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:31:16,401 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:31:16,403 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:31:16,403 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:31:16,404 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:31:16,405 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:31:16,405 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:31:16,407 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:31:16,408 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:31:16,409 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7246e5-a386-452d-bf73-b5a68ea11203/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-26 00:31:16,451 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:31:16,451 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:31:16,452 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:31:16,452 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:31:16,453 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:31:16,454 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:31:16,454 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:31:16,454 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:31:16,454 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:31:16,455 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:31:16,456 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:31:16,456 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:31:16,456 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:31:16,456 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:31:16,457 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:31:16,457 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:31:16,457 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:31:16,457 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:31:16,458 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:31:16,459 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:31:16,459 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:31:16,459 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:31:16,459 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:31:16,459 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 00:31:16,460 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:31:16,460 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 00:31:16,460 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:31:16,460 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 00:31:16,461 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:31:16,461 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 00:31:16,461 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:31:16,462 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:31:16,462 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:31:16,462 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:31:16,462 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:31:16,463 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:31:16,463 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 00:31:16,463 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:31:16,463 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:31:16,464 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 00:31:16,464 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:31:16,464 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_8d7246e5-a386-452d-bf73-b5a68ea11203/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7246e5-a386-452d-bf73-b5a68ea11203/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 86e7865b5c88aae342720e4dde014f366638a0b48b0e0f6e55acb2c675bcac3e [2022-11-26 00:31:16,824 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:31:16,867 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:31:16,870 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:31:16,871 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:31:16,872 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:31:16,873 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7246e5-a386-452d-bf73-b5a68ea11203/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/ldv-regression/stateful_check.c [2022-11-26 00:31:19,895 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:31:20,175 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:31:20,176 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7246e5-a386-452d-bf73-b5a68ea11203/sv-benchmarks/c/ldv-regression/stateful_check.c [2022-11-26 00:31:20,184 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7246e5-a386-452d-bf73-b5a68ea11203/bin/utaipan-ByfvJB40ur/data/ba3e5d49b/e26ed51b4f324fdbbddb7137c44c4be1/FLAG7ef36122d [2022-11-26 00:31:20,216 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7246e5-a386-452d-bf73-b5a68ea11203/bin/utaipan-ByfvJB40ur/data/ba3e5d49b/e26ed51b4f324fdbbddb7137c44c4be1 [2022-11-26 00:31:20,219 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:31:20,221 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:31:20,224 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:31:20,224 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:31:20,243 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:31:20,244 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:31:20" (1/1) ... [2022-11-26 00:31:20,245 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2dda4787 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:31:20, skipping insertion in model container [2022-11-26 00:31:20,245 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:31:20" (1/1) ... [2022-11-26 00:31:20,254 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:31:20,295 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:31:20,446 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7246e5-a386-452d-bf73-b5a68ea11203/sv-benchmarks/c/ldv-regression/stateful_check.c[298,311] [2022-11-26 00:31:20,476 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:31:20,485 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:31:20,497 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7246e5-a386-452d-bf73-b5a68ea11203/sv-benchmarks/c/ldv-regression/stateful_check.c[298,311] [2022-11-26 00:31:20,504 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:31:20,518 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:31:20,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:31:20 WrapperNode [2022-11-26 00:31:20,519 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:31:20,520 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:31:20,520 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:31:20,520 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:31:20,528 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:31:20" (1/1) ... [2022-11-26 00:31:20,535 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:31:20" (1/1) ... [2022-11-26 00:31:20,555 INFO L138 Inliner]: procedures = 21, calls = 20, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 100 [2022-11-26 00:31:20,556 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:31:20,557 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:31:20,557 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:31:20,557 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:31:20,564 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:31:20" (1/1) ... [2022-11-26 00:31:20,565 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:31:20" (1/1) ... [2022-11-26 00:31:20,566 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:31:20" (1/1) ... [2022-11-26 00:31:20,566 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:31:20" (1/1) ... [2022-11-26 00:31:20,570 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:31:20" (1/1) ... [2022-11-26 00:31:20,574 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:31:20" (1/1) ... [2022-11-26 00:31:20,575 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:31:20" (1/1) ... [2022-11-26 00:31:20,576 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:31:20" (1/1) ... [2022-11-26 00:31:20,578 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:31:20,579 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:31:20,579 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:31:20,579 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:31:20,580 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:31:20" (1/1) ... [2022-11-26 00:31:20,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:31:20,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7246e5-a386-452d-bf73-b5a68ea11203/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:31:20,614 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7246e5-a386-452d-bf73-b5a68ea11203/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:31:20,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7246e5-a386-452d-bf73-b5a68ea11203/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:31:20,668 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:31:20,669 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2022-11-26 00:31:20,670 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2022-11-26 00:31:20,670 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:31:20,670 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2022-11-26 00:31:20,671 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2022-11-26 00:31:20,671 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:31:20,671 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:31:20,755 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:31:20,758 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:31:21,027 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:31:21,118 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:31:21,119 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-26 00:31:21,121 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:31:21 BoogieIcfgContainer [2022-11-26 00:31:21,122 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:31:21,125 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:31:21,125 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:31:21,128 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:31:21,129 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:31:20" (1/3) ... [2022-11-26 00:31:21,130 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bf24797 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:31:21, skipping insertion in model container [2022-11-26 00:31:21,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:31:20" (2/3) ... [2022-11-26 00:31:21,130 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bf24797 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:31:21, skipping insertion in model container [2022-11-26 00:31:21,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:31:21" (3/3) ... [2022-11-26 00:31:21,132 INFO L112 eAbstractionObserver]: Analyzing ICFG stateful_check.c [2022-11-26 00:31:21,152 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:31:21,152 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 00:31:21,204 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:31:21,211 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5c14d9db, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:31:21,211 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 00:31:21,215 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 20 states have (on average 1.6) internal successors, (32), 25 states have internal predecessors, (32), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-26 00:31:21,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-26 00:31:21,223 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:31:21,224 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-26 00:31:21,224 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:31:21,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:31:21,230 INFO L85 PathProgramCache]: Analyzing trace with hash 851666694, now seen corresponding path program 1 times [2022-11-26 00:31:21,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:31:21,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003064681] [2022-11-26 00:31:21,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:31:21,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:31:21,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:31:21,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:31:21,387 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:31:21,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003064681] [2022-11-26 00:31:21,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003064681] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:31:21,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:31:21,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:31:21,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028861689] [2022-11-26 00:31:21,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:31:21,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-26 00:31:21,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:31:21,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-26 00:31:21,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-26 00:31:21,427 INFO L87 Difference]: Start difference. First operand has 30 states, 20 states have (on average 1.6) internal successors, (32), 25 states have internal predecessors, (32), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:31:21,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:31:21,473 INFO L93 Difference]: Finished difference Result 58 states and 90 transitions. [2022-11-26 00:31:21,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-26 00:31:21,475 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-26 00:31:21,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:31:21,483 INFO L225 Difference]: With dead ends: 58 [2022-11-26 00:31:21,483 INFO L226 Difference]: Without dead ends: 27 [2022-11-26 00:31:21,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-26 00:31:21,497 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:31:21,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:31:21,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-26 00:31:21,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-11-26 00:31:21,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 22 states have internal predecessors, (28), 6 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 00:31:21,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2022-11-26 00:31:21,544 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 6 [2022-11-26 00:31:21,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:31:21,544 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2022-11-26 00:31:21,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:31:21,545 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2022-11-26 00:31:21,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-26 00:31:21,545 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:31:21,545 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:31:21,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 00:31:21,546 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:31:21,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:31:21,547 INFO L85 PathProgramCache]: Analyzing trace with hash -2086219880, now seen corresponding path program 1 times [2022-11-26 00:31:21,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:31:21,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677688183] [2022-11-26 00:31:21,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:31:21,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:31:21,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:31:21,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:31:21,626 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:31:21,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677688183] [2022-11-26 00:31:21,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677688183] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:31:21,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:31:21,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:31:21,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824909036] [2022-11-26 00:31:21,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:31:21,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:31:21,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:31:21,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:31:21,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:31:21,630 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:31:21,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:31:21,703 INFO L93 Difference]: Finished difference Result 46 states and 65 transitions. [2022-11-26 00:31:21,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:31:21,704 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-26 00:31:21,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:31:21,706 INFO L225 Difference]: With dead ends: 46 [2022-11-26 00:31:21,707 INFO L226 Difference]: Without dead ends: 40 [2022-11-26 00:31:21,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:31:21,709 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 18 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:31:21,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 56 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:31:21,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-26 00:31:21,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-11-26 00:31:21,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 30 states have (on average 1.5) internal successors, (45), 33 states have internal predecessors, (45), 8 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-26 00:31:21,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 58 transitions. [2022-11-26 00:31:21,725 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 58 transitions. Word has length 7 [2022-11-26 00:31:21,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:31:21,726 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 58 transitions. [2022-11-26 00:31:21,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:31:21,726 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 58 transitions. [2022-11-26 00:31:21,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-26 00:31:21,727 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:31:21,727 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:31:21,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-26 00:31:21,728 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:31:21,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:31:21,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1367247570, now seen corresponding path program 1 times [2022-11-26 00:31:21,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:31:21,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671443531] [2022-11-26 00:31:21,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:31:21,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:31:21,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:31:21,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:31:21,859 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:31:21,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671443531] [2022-11-26 00:31:21,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671443531] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:31:21,860 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:31:21,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:31:21,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641093346] [2022-11-26 00:31:21,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:31:21,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:31:21,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:31:21,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:31:21,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:31:21,863 INFO L87 Difference]: Start difference. First operand 40 states and 58 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:31:21,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:31:21,938 INFO L93 Difference]: Finished difference Result 98 states and 145 transitions. [2022-11-26 00:31:21,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:31:21,948 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-11-26 00:31:21,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:31:21,950 INFO L225 Difference]: With dead ends: 98 [2022-11-26 00:31:21,950 INFO L226 Difference]: Without dead ends: 59 [2022-11-26 00:31:21,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:31:21,952 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 6 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:31:21,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 56 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:31:21,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-26 00:31:21,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2022-11-26 00:31:21,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 46 states have (on average 1.5217391304347827) internal successors, (70), 49 states have internal predecessors, (70), 8 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-26 00:31:21,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 83 transitions. [2022-11-26 00:31:21,972 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 83 transitions. Word has length 17 [2022-11-26 00:31:21,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:31:21,973 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 83 transitions. [2022-11-26 00:31:21,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:31:21,974 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 83 transitions. [2022-11-26 00:31:21,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-26 00:31:21,977 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:31:21,977 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:31:21,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-26 00:31:21,978 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:31:21,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:31:21,979 INFO L85 PathProgramCache]: Analyzing trace with hash -258857559, now seen corresponding path program 1 times [2022-11-26 00:31:21,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:31:21,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557734785] [2022-11-26 00:31:21,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:31:21,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:31:22,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:31:22,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:31:22,196 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:31:22,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557734785] [2022-11-26 00:31:22,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557734785] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:31:22,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540768228] [2022-11-26 00:31:22,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:31:22,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:31:22,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7246e5-a386-452d-bf73-b5a68ea11203/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:31:22,201 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7246e5-a386-452d-bf73-b5a68ea11203/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:31:22,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7246e5-a386-452d-bf73-b5a68ea11203/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:31:22,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:31:22,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-26 00:31:22,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:31:22,531 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:31:22,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:31:22,747 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:31:22,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540768228] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-26 00:31:22,748 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:31:22,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 3] total 6 [2022-11-26 00:31:22,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29097496] [2022-11-26 00:31:22,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:31:22,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:31:22,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:31:22,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:31:22,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:31:22,754 INFO L87 Difference]: Start difference. First operand 56 states and 83 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:31:22,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:31:22,793 INFO L93 Difference]: Finished difference Result 146 states and 220 transitions. [2022-11-26 00:31:22,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:31:22,794 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-11-26 00:31:22,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:31:22,796 INFO L225 Difference]: With dead ends: 146 [2022-11-26 00:31:22,796 INFO L226 Difference]: Without dead ends: 91 [2022-11-26 00:31:22,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:31:22,798 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 5 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:31:22,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 55 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:31:22,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-11-26 00:31:22,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 88. [2022-11-26 00:31:22,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 78 states have (on average 1.5384615384615385) internal successors, (120), 81 states have internal predecessors, (120), 8 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-26 00:31:22,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 133 transitions. [2022-11-26 00:31:22,812 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 133 transitions. Word has length 21 [2022-11-26 00:31:22,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:31:22,813 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 133 transitions. [2022-11-26 00:31:22,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:31:22,813 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 133 transitions. [2022-11-26 00:31:22,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-26 00:31:22,814 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:31:22,814 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:31:22,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7246e5-a386-452d-bf73-b5a68ea11203/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-26 00:31:23,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7246e5-a386-452d-bf73-b5a68ea11203/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:31:23,020 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:31:23,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:31:23,021 INFO L85 PathProgramCache]: Analyzing trace with hash 462524107, now seen corresponding path program 1 times [2022-11-26 00:31:23,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:31:23,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870135164] [2022-11-26 00:31:23,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:31:23,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:31:23,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:31:23,363 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 00:31:23,364 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:31:23,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870135164] [2022-11-26 00:31:23,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870135164] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:31:23,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444879752] [2022-11-26 00:31:23,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:31:23,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:31:23,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7246e5-a386-452d-bf73-b5a68ea11203/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:31:23,377 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7246e5-a386-452d-bf73-b5a68ea11203/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:31:23,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7246e5-a386-452d-bf73-b5a68ea11203/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 00:31:23,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:31:23,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-26 00:31:23,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:31:23,585 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 00:31:23,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:31:23,816 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 00:31:23,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444879752] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:31:23,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [618159282] [2022-11-26 00:31:23,846 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-26 00:31:23,847 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:31:23,851 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:31:23,857 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:31:23,858 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:31:24,467 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:31:25,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [618159282] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:31:25,008 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:31:25,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [4, 3, 4] total 15 [2022-11-26 00:31:25,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570846662] [2022-11-26 00:31:25,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:31:25,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-26 00:31:25,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:31:25,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-26 00:31:25,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2022-11-26 00:31:25,011 INFO L87 Difference]: Start difference. First operand 88 states and 133 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 9 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:31:25,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:31:25,385 INFO L93 Difference]: Finished difference Result 215 states and 322 transitions. [2022-11-26 00:31:25,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-26 00:31:25,386 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 9 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-11-26 00:31:25,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:31:25,392 INFO L225 Difference]: With dead ends: 215 [2022-11-26 00:31:25,393 INFO L226 Difference]: Without dead ends: 128 [2022-11-26 00:31:25,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2022-11-26 00:31:25,400 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 4 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:31:25,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 103 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:31:25,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-11-26 00:31:25,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 120. [2022-11-26 00:31:25,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 110 states have (on average 1.5272727272727273) internal successors, (168), 113 states have internal predecessors, (168), 8 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-26 00:31:25,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 181 transitions. [2022-11-26 00:31:25,426 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 181 transitions. Word has length 27 [2022-11-26 00:31:25,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:31:25,427 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 181 transitions. [2022-11-26 00:31:25,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 9 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:31:25,427 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 181 transitions. [2022-11-26 00:31:25,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-26 00:31:25,428 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:31:25,428 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:31:25,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7246e5-a386-452d-bf73-b5a68ea11203/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-26 00:31:25,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7246e5-a386-452d-bf73-b5a68ea11203/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:31:25,634 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:31:25,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:31:25,635 INFO L85 PathProgramCache]: Analyzing trace with hash -369026430, now seen corresponding path program 1 times [2022-11-26 00:31:25,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:31:25,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241564740] [2022-11-26 00:31:25,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:31:25,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:31:25,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:31:25,809 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-26 00:31:25,809 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:31:25,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241564740] [2022-11-26 00:31:25,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241564740] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:31:25,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944550942] [2022-11-26 00:31:25,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:31:25,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:31:25,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7246e5-a386-452d-bf73-b5a68ea11203/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:31:25,811 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7246e5-a386-452d-bf73-b5a68ea11203/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:31:25,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7246e5-a386-452d-bf73-b5a68ea11203/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 00:31:25,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:31:25,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-26 00:31:25,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:31:25,980 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-26 00:31:25,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:31:26,196 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-26 00:31:26,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944550942] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:31:26,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1296456665] [2022-11-26 00:31:26,199 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-26 00:31:26,199 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:31:26,199 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:31:26,199 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:31:26,200 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:31:26,803 INFO L197 IcfgInterpreter]: Interpreting procedure mutex_lock with input of size 37 for LOIs [2022-11-26 00:31:26,841 INFO L197 IcfgInterpreter]: Interpreting procedure __blast_assert with input of size 13 for LOIs [2022-11-26 00:31:26,843 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:31:27,984 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1969#(and (= 2 ~ldv_mutex~0) (= ~open_called~0 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:31:27,985 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:31:27,985 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:31:27,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 6] total 9 [2022-11-26 00:31:27,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907975287] [2022-11-26 00:31:27,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:31:27,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-26 00:31:27,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:31:27,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-26 00:31:27,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2022-11-26 00:31:27,987 INFO L87 Difference]: Start difference. First operand 120 states and 181 transitions. Second operand has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 9 states have internal predecessors, (49), 1 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-26 00:31:28,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:31:28,102 INFO L93 Difference]: Finished difference Result 264 states and 401 transitions. [2022-11-26 00:31:28,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 00:31:28,103 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 9 states have internal predecessors, (49), 1 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2022-11-26 00:31:28,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:31:28,105 INFO L225 Difference]: With dead ends: 264 [2022-11-26 00:31:28,106 INFO L226 Difference]: Without dead ends: 177 [2022-11-26 00:31:28,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2022-11-26 00:31:28,111 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 36 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:31:28,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 125 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:31:28,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-11-26 00:31:28,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 88. [2022-11-26 00:31:28,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 78 states have (on average 1.5384615384615385) internal successors, (120), 81 states have internal predecessors, (120), 8 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-26 00:31:28,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 133 transitions. [2022-11-26 00:31:28,147 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 133 transitions. Word has length 32 [2022-11-26 00:31:28,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:31:28,148 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 133 transitions. [2022-11-26 00:31:28,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 9 states have internal predecessors, (49), 1 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-26 00:31:28,148 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 133 transitions. [2022-11-26 00:31:28,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-26 00:31:28,154 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:31:28,154 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:31:28,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7246e5-a386-452d-bf73-b5a68ea11203/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 00:31:28,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7246e5-a386-452d-bf73-b5a68ea11203/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:31:28,360 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:31:28,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:31:28,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1596101560, now seen corresponding path program 2 times [2022-11-26 00:31:28,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:31:28,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177729191] [2022-11-26 00:31:28,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:31:28,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:31:28,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-26 00:31:28,377 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-26 00:31:28,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-26 00:31:28,406 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-26 00:31:28,406 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-26 00:31:28,408 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-26 00:31:28,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-26 00:31:28,415 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1] [2022-11-26 00:31:28,420 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-26 00:31:28,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 12:31:28 BoogieIcfgContainer [2022-11-26 00:31:28,469 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-26 00:31:28,470 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-26 00:31:28,470 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-26 00:31:28,470 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-26 00:31:28,471 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:31:21" (3/4) ... [2022-11-26 00:31:28,473 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-26 00:31:28,513 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7246e5-a386-452d-bf73-b5a68ea11203/bin/utaipan-ByfvJB40ur/witness.graphml [2022-11-26 00:31:28,513 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-26 00:31:28,514 INFO L158 Benchmark]: Toolchain (without parser) took 8293.40ms. Allocated memory was 157.3MB in the beginning and 226.5MB in the end (delta: 69.2MB). Free memory was 130.1MB in the beginning and 130.6MB in the end (delta: -498.7kB). Peak memory consumption was 67.7MB. Max. memory is 16.1GB. [2022-11-26 00:31:28,514 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 115.3MB. Free memory is still 82.8MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-26 00:31:28,514 INFO L158 Benchmark]: CACSL2BoogieTranslator took 295.25ms. Allocated memory is still 157.3MB. Free memory was 129.5MB in the beginning and 118.7MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-26 00:31:28,515 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.34ms. Allocated memory is still 157.3MB. Free memory was 118.7MB in the beginning and 117.3MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-26 00:31:28,515 INFO L158 Benchmark]: Boogie Preprocessor took 21.35ms. Allocated memory is still 157.3MB. Free memory was 117.3MB in the beginning and 115.9MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-26 00:31:28,515 INFO L158 Benchmark]: RCFGBuilder took 543.40ms. Allocated memory is still 157.3MB. Free memory was 115.9MB in the beginning and 98.4MB in the end (delta: 17.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-11-26 00:31:28,516 INFO L158 Benchmark]: TraceAbstraction took 7344.88ms. Allocated memory was 157.3MB in the beginning and 226.5MB in the end (delta: 69.2MB). Free memory was 97.7MB in the beginning and 133.8MB in the end (delta: -36.0MB). Peak memory consumption was 36.2MB. Max. memory is 16.1GB. [2022-11-26 00:31:28,516 INFO L158 Benchmark]: Witness Printer took 43.49ms. Allocated memory is still 226.5MB. Free memory was 133.8MB in the beginning and 130.6MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-26 00:31:28,518 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 115.3MB. Free memory is still 82.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 295.25ms. Allocated memory is still 157.3MB. Free memory was 129.5MB in the beginning and 118.7MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 36.34ms. Allocated memory is still 157.3MB. Free memory was 118.7MB in the beginning and 117.3MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 21.35ms. Allocated memory is still 157.3MB. Free memory was 117.3MB in the beginning and 115.9MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 543.40ms. Allocated memory is still 157.3MB. Free memory was 115.9MB in the beginning and 98.4MB in the end (delta: 17.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 7344.88ms. Allocated memory was 157.3MB in the beginning and 226.5MB in the end (delta: 69.2MB). Free memory was 97.7MB in the beginning and 133.8MB in the end (delta: -36.0MB). Peak memory consumption was 36.2MB. Max. memory is 16.1GB. * Witness Printer took 43.49ms. Allocated memory is still 226.5MB. Free memory was 133.8MB in the beginning and 130.6MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 6]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L11] int ldv_mutex = 1; [L13] int open_called = 0; [L76] int ldv_s_misc_fops_file_operations = 0; [L77] CALL my_init() [L71] open_called = 0 [L72] return 0; [L77] RET my_init() [L78] COND TRUE __VERIFIER_nondet_int() [L82] case 0: [L83] COND TRUE ldv_s_misc_fops_file_operations==0 [L84] CALL misc_open() [L59] COND TRUE __VERIFIER_nondet_int() [L61] return 1; [L84] RET misc_open() [L85] ldv_s_misc_fops_file_operations++ VAL [__VERIFIER_nondet_int()=0, ldv_mutex=1, ldv_s_misc_fops_file_operations=1, ldv_s_misc_fops_file_operations++=53, misc_open()=55, open_called=0] [L78] COND TRUE __VERIFIER_nondet_int() [L82] case 0: [L90] case 1: [L91] COND TRUE ldv_s_misc_fops_file_operations==1 [L92] CALL misc_read() [L54] return 0; [L92] RET misc_read() [L93] ldv_s_misc_fops_file_operations++ VAL [__VERIFIER_nondet_int()=1, ldv_mutex=1, ldv_s_misc_fops_file_operations=2, ldv_s_misc_fops_file_operations++=53, ldv_s_misc_fops_file_operations++=57, misc_open()=55, misc_read()=54, open_called=0] [L78] COND TRUE __VERIFIER_nondet_int() [L82] case 0: [L90] case 1: [L98] case 2: [L99] COND TRUE ldv_s_misc_fops_file_operations==2 [L100] CALL misc_llseek() [L50] return 0; [L100] RET misc_llseek() [L101] ldv_s_misc_fops_file_operations++ VAL [__VERIFIER_nondet_int()=2, ldv_mutex=1, ldv_s_misc_fops_file_operations=3, ldv_s_misc_fops_file_operations++=53, ldv_s_misc_fops_file_operations++=57, ldv_s_misc_fops_file_operations++=52, misc_llseek()=49, misc_open()=55, misc_read()=54, open_called=0] [L78] COND TRUE __VERIFIER_nondet_int() [L82] case 0: [L90] case 1: [L98] case 2: [L106] case 3: VAL [__VERIFIER_nondet_int()=3, ldv_mutex=1, ldv_s_misc_fops_file_operations=3, ldv_s_misc_fops_file_operations++=53, ldv_s_misc_fops_file_operations++=57, ldv_s_misc_fops_file_operations++=52, misc_llseek()=49, misc_open()=55, misc_read()=54, open_called=0] [L107] COND TRUE ldv_s_misc_fops_file_operations==3 [L108] CALL misc_release() [L36] COND FALSE !(\read(open_called)) VAL [ldv_mutex=1, open_called=0] [L43] CALL mutex_lock() VAL [\old(ldv_mutex)=1, ldv_mutex=1, open_called=0] [L18] (ldv_mutex == 1) ? 0 : __blast_assert() VAL [\old(ldv_mutex)=1, ldv_mutex=1, open_called=0] [L19] ldv_mutex = 2 [L43] RET mutex_lock() VAL [ldv_mutex=2, open_called=0] [L44] CALL mutex_lock() VAL [\old(ldv_mutex)=2, ldv_mutex=2, open_called=0] [L18] (ldv_mutex == 1) ? 0 : __blast_assert() VAL [\old(ldv_mutex)=2, ldv_mutex=2, open_called=0] [L18] CALL __blast_assert() VAL [\old(ldv_mutex)=2, ldv_mutex=2, open_called=0] [L6] reach_error() VAL [\old(ldv_mutex)=2, ldv_mutex=2, open_called=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 7.2s, OverallIterations: 7, TraceHistogramMax: 4, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 72 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 69 mSDsluCounter, 425 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 246 mSDsCounter, 21 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 290 IncrementalHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 21 mSolverCounterUnsat, 179 mSDtfsCounter, 290 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 236 GetRequests, 191 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 1.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=120occurred in iteration=5, InterpolantAutomatonStates: 29, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 6 MinimizatonAttempts, 103 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 222 NumberOfCodeBlocks, 222 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 258 ConstructedInterpolants, 0 QuantifiedInterpolants, 693 SizeOfPredicates, 33 NumberOfNonLiveVariables, 280 ConjunctsInSsa, 19 ConjunctsInUnsatCore, 12 InterpolantComputations, 4 PerfectInterpolantSequences, 58/130 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 0.6s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 1, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 16, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 29, TOOLS_POST_TIME: 0.4s, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME: 0.0s, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME: 0.0s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 29, TOOLS_QUANTIFIERELIM_TIME: 0.4s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.1s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 44, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 8, DOMAIN_JOIN_TIME: 0.1s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 1, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 2, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 16, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME: 0.3s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.3s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 2, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 267, DAG_COMPRESSION_RETAINED_NODES: 46, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-11-26 00:31:28,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7246e5-a386-452d-bf73-b5a68ea11203/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE