./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread/queue.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e7bb482b 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_fe1f68e4-f0a9-4291-b94c-05a6910adef2/bin/utaipan-verify-FOvIYxoinp/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe1f68e4-f0a9-4291-b94c-05a6910adef2/bin/utaipan-verify-FOvIYxoinp/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe1f68e4-f0a9-4291-b94c-05a6910adef2/bin/utaipan-verify-FOvIYxoinp/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe1f68e4-f0a9-4291-b94c-05a6910adef2/bin/utaipan-verify-FOvIYxoinp/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/queue.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe1f68e4-f0a9-4291-b94c-05a6910adef2/bin/utaipan-verify-FOvIYxoinp/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe1f68e4-f0a9-4291-b94c-05a6910adef2/bin/utaipan-verify-FOvIYxoinp --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4d771c5dc4ab027f123135a7de4324b9be0c6bae288f44d0eaffc15d1836bd60 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 21:05:32,356 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 21:05:32,461 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe1f68e4-f0a9-4291-b94c-05a6910adef2/bin/utaipan-verify-FOvIYxoinp/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-11-06 21:05:32,467 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 21:05:32,468 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 21:05:32,496 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 21:05:32,496 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 21:05:32,497 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 21:05:32,498 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 21:05:32,498 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 21:05:32,499 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-06 21:05:32,499 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-06 21:05:32,500 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-06 21:05:32,501 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-06 21:05:32,501 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-06 21:05:32,502 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-06 21:05:32,502 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-06 21:05:32,503 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-06 21:05:32,504 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-06 21:05:32,504 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-06 21:05:32,505 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-06 21:05:32,510 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-06 21:05:32,511 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 21:05:32,511 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 21:05:32,515 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 21:05:32,516 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 21:05:32,516 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 21:05:32,517 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 21:05:32,517 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 21:05:32,517 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 21:05:32,519 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 21:05:32,519 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 21:05:32,519 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 21:05:32,519 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 21:05:32,519 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 21:05:32,519 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 21:05:32,520 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 21:05:32,520 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 21:05:32,520 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 21:05:32,520 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:05:32,520 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 21:05:32,522 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 21:05:32,522 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-06 21:05:32,522 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 21:05:32,523 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-06 21:05:32,523 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 21:05:32,523 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe1f68e4-f0a9-4291-b94c-05a6910adef2/bin/utaipan-verify-FOvIYxoinp/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe1f68e4-f0a9-4291-b94c-05a6910adef2/bin/utaipan-verify-FOvIYxoinp Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d771c5dc4ab027f123135a7de4324b9be0c6bae288f44d0eaffc15d1836bd60 [2023-11-06 21:05:32,855 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 21:05:32,885 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 21:05:32,888 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 21:05:32,907 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 21:05:32,908 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 21:05:32,910 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe1f68e4-f0a9-4291-b94c-05a6910adef2/bin/utaipan-verify-FOvIYxoinp/../../sv-benchmarks/c/pthread/queue.i [2023-11-06 21:05:36,103 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 21:05:36,432 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 21:05:36,433 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe1f68e4-f0a9-4291-b94c-05a6910adef2/sv-benchmarks/c/pthread/queue.i [2023-11-06 21:05:36,464 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe1f68e4-f0a9-4291-b94c-05a6910adef2/bin/utaipan-verify-FOvIYxoinp/data/b580c17a5/e889ad9c3c7f4c6fb878714379f2a9eb/FLAG4c9ef8ede [2023-11-06 21:05:36,479 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe1f68e4-f0a9-4291-b94c-05a6910adef2/bin/utaipan-verify-FOvIYxoinp/data/b580c17a5/e889ad9c3c7f4c6fb878714379f2a9eb [2023-11-06 21:05:36,482 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 21:05:36,483 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 21:05:36,489 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 21:05:36,490 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 21:05:36,496 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 21:05:36,497 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:05:36" (1/1) ... [2023-11-06 21:05:36,498 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bb43325 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:05:36, skipping insertion in model container [2023-11-06 21:05:36,499 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:05:36" (1/1) ... [2023-11-06 21:05:36,573 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 21:05:37,191 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:05:37,205 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 21:05:37,292 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:05:37,377 INFO L206 MainTranslator]: Completed translation [2023-11-06 21:05:37,378 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:05:37 WrapperNode [2023-11-06 21:05:37,378 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 21:05:37,379 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 21:05:37,379 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 21:05:37,380 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 21:05:37,387 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:05:37" (1/1) ... [2023-11-06 21:05:37,408 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:05:37" (1/1) ... [2023-11-06 21:05:37,446 INFO L138 Inliner]: procedures = 274, calls = 71, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 260 [2023-11-06 21:05:37,447 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 21:05:37,447 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 21:05:37,448 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 21:05:37,448 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 21:05:37,463 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:05:37" (1/1) ... [2023-11-06 21:05:37,464 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:05:37" (1/1) ... [2023-11-06 21:05:37,472 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:05:37" (1/1) ... [2023-11-06 21:05:37,473 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:05:37" (1/1) ... [2023-11-06 21:05:37,491 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:05:37" (1/1) ... [2023-11-06 21:05:37,495 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:05:37" (1/1) ... [2023-11-06 21:05:37,498 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:05:37" (1/1) ... [2023-11-06 21:05:37,500 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:05:37" (1/1) ... [2023-11-06 21:05:37,506 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 21:05:37,509 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 21:05:37,509 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 21:05:37,509 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 21:05:37,510 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:05:37" (1/1) ... [2023-11-06 21:05:37,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:05:37,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe1f68e4-f0a9-4291-b94c-05a6910adef2/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:05:37,546 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe1f68e4-f0a9-4291-b94c-05a6910adef2/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 21:05:37,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe1f68e4-f0a9-4291-b94c-05a6910adef2/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 21:05:37,588 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-06 21:05:37,588 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-06 21:05:37,589 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-06 21:05:37,589 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-06 21:05:37,589 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 21:05:37,589 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 21:05:37,590 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 21:05:37,590 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 21:05:37,590 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-06 21:05:37,590 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 21:05:37,590 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 21:05:37,591 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 21:05:37,591 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 21:05:37,593 WARN L210 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 21:05:37,775 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 21:05:37,779 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 21:05:38,438 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 21:05:38,450 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 21:05:38,450 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-06 21:05:38,453 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:05:38 BoogieIcfgContainer [2023-11-06 21:05:38,453 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 21:05:38,456 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 21:05:38,456 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 21:05:38,460 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 21:05:38,460 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:05:36" (1/3) ... [2023-11-06 21:05:38,461 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fb26989 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:05:38, skipping insertion in model container [2023-11-06 21:05:38,461 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:05:37" (2/3) ... [2023-11-06 21:05:38,461 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fb26989 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:05:38, skipping insertion in model container [2023-11-06 21:05:38,461 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:05:38" (3/3) ... [2023-11-06 21:05:38,463 INFO L112 eAbstractionObserver]: Analyzing ICFG queue.i [2023-11-06 21:05:38,483 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 21:05:38,484 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 80 error locations. [2023-11-06 21:05:38,484 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 21:05:38,647 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-06 21:05:38,691 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-06 21:05:38,710 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 362 places, 373 transitions, 760 flow [2023-11-06 21:05:38,713 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 362 places, 373 transitions, 760 flow [2023-11-06 21:05:38,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 362 places, 373 transitions, 760 flow [2023-11-06 21:05:38,904 INFO L124 PetriNetUnfolderBase]: 18/371 cut-off events. [2023-11-06 21:05:38,905 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 21:05:38,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 380 conditions, 371 events. 18/371 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 825 event pairs, 0 based on Foata normal form. 0/273 useless extension candidates. Maximal degree in co-relation 267. Up to 2 conditions per place. [2023-11-06 21:05:38,950 INFO L119 LiptonReduction]: Number of co-enabled transitions 33180 [2023-11-06 21:06:01,973 INFO L134 LiptonReduction]: Checked pairs total: 106485 [2023-11-06 21:06:01,973 INFO L136 LiptonReduction]: Total number of compositions: 610 [2023-11-06 21:06:01,983 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 140 places, 144 transitions, 302 flow [2023-11-06 21:06:02,452 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 9814 states, 7157 states have (on average 3.93866145032835) internal successors, (28189), 9813 states have internal predecessors, (28189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:06:02,480 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 21:06:02,489 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3ab5ae2c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-06 21:06:02,489 INFO L358 AbstractCegarLoop]: Starting to check reachability of 142 error locations. [2023-11-06 21:06:02,525 INFO L276 IsEmpty]: Start isEmpty. Operand has 9814 states, 7157 states have (on average 3.93866145032835) internal successors, (28189), 9813 states have internal predecessors, (28189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:06:02,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2 [2023-11-06 21:06:02,530 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:06:02,531 INFO L195 NwaCegarLoop]: trace histogram [1] [2023-11-06 21:06:02,532 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-06 21:06:02,537 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:06:02,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1707, now seen corresponding path program 1 times [2023-11-06 21:06:02,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:06:02,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112601754] [2023-11-06 21:06:02,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:06:02,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:06:02,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:06:02,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:06:02,675 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:06:02,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112601754] [2023-11-06 21:06:02,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112601754] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:06:02,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:06:02,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-11-06 21:06:02,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549897091] [2023-11-06 21:06:02,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:06:02,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 21:06:02,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:06:02,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 21:06:02,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 21:06:02,731 INFO L87 Difference]: Start difference. First operand has 9814 states, 7157 states have (on average 3.93866145032835) internal successors, (28189), 9813 states have internal predecessors, (28189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:06:03,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:06:03,009 INFO L93 Difference]: Finished difference Result 4512 states and 12954 transitions. [2023-11-06 21:06:03,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 21:06:03,012 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1 [2023-11-06 21:06:03,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:06:03,073 INFO L225 Difference]: With dead ends: 4512 [2023-11-06 21:06:03,073 INFO L226 Difference]: Without dead ends: 4512 [2023-11-06 21:06:03,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 0 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 21:06:03,077 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:06:03,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 7 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 21:06:03,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4512 states. [2023-11-06 21:06:03,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4512 to 4512. [2023-11-06 21:06:03,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4512 states, 3943 states have (on average 3.2853157494293685) internal successors, (12954), 4511 states have internal predecessors, (12954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:06:03,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4512 states to 4512 states and 12954 transitions. [2023-11-06 21:06:03,444 INFO L78 Accepts]: Start accepts. Automaton has 4512 states and 12954 transitions. Word has length 1 [2023-11-06 21:06:03,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:06:03,444 INFO L495 AbstractCegarLoop]: Abstraction has 4512 states and 12954 transitions. [2023-11-06 21:06:03,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:06:03,445 INFO L276 IsEmpty]: Start isEmpty. Operand 4512 states and 12954 transitions. [2023-11-06 21:06:03,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-06 21:06:03,446 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:06:03,446 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-06 21:06:03,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 21:06:03,446 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-06 21:06:03,447 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:06:03,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1682777, now seen corresponding path program 1 times [2023-11-06 21:06:03,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:06:03,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934188209] [2023-11-06 21:06:03,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:06:03,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:06:03,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat