./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/parallel-ticket-8.wvr.c --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_a4d3e129-ff54-4a34-b2eb-24c16f025ded/bin/utaipan-verify-FOvIYxoinp/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d3e129-ff54-4a34-b2eb-24c16f025ded/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_a4d3e129-ff54-4a34-b2eb-24c16f025ded/bin/utaipan-verify-FOvIYxoinp/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d3e129-ff54-4a34-b2eb-24c16f025ded/bin/utaipan-verify-FOvIYxoinp/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/parallel-ticket-8.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d3e129-ff54-4a34-b2eb-24c16f025ded/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_a4d3e129-ff54-4a34-b2eb-24c16f025ded/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 f02fd31f03f03300713de36d3982e392122375115e7a5509580eaaa38dd9026f --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 20:34:56,262 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 20:34:56,410 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d3e129-ff54-4a34-b2eb-24c16f025ded/bin/utaipan-verify-FOvIYxoinp/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-11-06 20:34:56,421 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 20:34:56,422 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 20:34:56,460 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 20:34:56,461 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 20:34:56,462 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 20:34:56,463 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 20:34:56,468 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 20:34:56,469 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-06 20:34:56,469 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-06 20:34:56,470 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-06 20:34:56,472 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-06 20:34:56,472 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-06 20:34:56,472 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-06 20:34:56,473 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-06 20:34:56,474 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-06 20:34:56,474 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-06 20:34:56,475 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-06 20:34:56,475 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-06 20:34:56,476 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-06 20:34:56,476 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 20:34:56,477 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 20:34:56,478 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 20:34:56,478 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 20:34:56,479 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 20:34:56,479 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 20:34:56,480 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 20:34:56,480 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 20:34:56,482 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 20:34:56,482 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 20:34:56,482 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 20:34:56,482 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 20:34:56,483 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 20:34:56,483 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 20:34:56,483 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 20:34:56,484 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 20:34:56,484 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 20:34:56,484 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 20:34:56,485 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 20:34:56,485 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 20:34:56,485 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-06 20:34:56,486 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 20:34:56,486 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-06 20:34:56,487 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 20:34:56,487 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_a4d3e129-ff54-4a34-b2eb-24c16f025ded/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d3e129-ff54-4a34-b2eb-24c16f025ded/bin/utaipan-verify-FOvIYxoinp Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f02fd31f03f03300713de36d3982e392122375115e7a5509580eaaa38dd9026f [2023-11-06 20:34:56,781 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 20:34:56,817 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 20:34:56,820 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 20:34:56,821 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 20:34:56,823 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 20:34:56,825 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d3e129-ff54-4a34-b2eb-24c16f025ded/bin/utaipan-verify-FOvIYxoinp/../../sv-benchmarks/c/weaver/parallel-ticket-8.wvr.c [2023-11-06 20:34:59,961 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 20:35:00,210 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 20:35:00,211 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d3e129-ff54-4a34-b2eb-24c16f025ded/sv-benchmarks/c/weaver/parallel-ticket-8.wvr.c [2023-11-06 20:35:00,225 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d3e129-ff54-4a34-b2eb-24c16f025ded/bin/utaipan-verify-FOvIYxoinp/data/051fd24f1/1106d97460324c829cbd05cd15ac24a9/FLAG613426a22 [2023-11-06 20:35:00,244 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d3e129-ff54-4a34-b2eb-24c16f025ded/bin/utaipan-verify-FOvIYxoinp/data/051fd24f1/1106d97460324c829cbd05cd15ac24a9 [2023-11-06 20:35:00,247 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 20:35:00,249 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 20:35:00,253 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 20:35:00,253 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 20:35:00,259 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 20:35:00,259 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 08:35:00" (1/1) ... [2023-11-06 20:35:00,261 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@476d0325 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:35:00, skipping insertion in model container [2023-11-06 20:35:00,261 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 08:35:00" (1/1) ... [2023-11-06 20:35:00,308 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 20:35:00,523 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 20:35:00,534 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 20:35:00,576 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 20:35:00,585 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 20:35:00,586 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 20:35:00,593 INFO L206 MainTranslator]: Completed translation [2023-11-06 20:35:00,594 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:35:00 WrapperNode [2023-11-06 20:35:00,594 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 20:35:00,595 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 20:35:00,595 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 20:35:00,596 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 20:35:00,603 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:35:00" (1/1) ... [2023-11-06 20:35:00,615 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:35:00" (1/1) ... [2023-11-06 20:35:00,666 INFO L138 Inliner]: procedures = 27, calls = 131, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 371 [2023-11-06 20:35:00,672 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 20:35:00,673 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 20:35:00,673 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 20:35:00,673 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 20:35:00,681 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:35:00" (1/1) ... [2023-11-06 20:35:00,682 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:35:00" (1/1) ... [2023-11-06 20:35:00,688 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:35:00" (1/1) ... [2023-11-06 20:35:00,689 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:35:00" (1/1) ... [2023-11-06 20:35:00,701 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:35:00" (1/1) ... [2023-11-06 20:35:00,703 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:35:00" (1/1) ... [2023-11-06 20:35:00,706 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:35:00" (1/1) ... [2023-11-06 20:35:00,709 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:35:00" (1/1) ... [2023-11-06 20:35:00,728 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 20:35:00,729 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 20:35:00,729 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 20:35:00,730 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 20:35:00,730 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:35:00" (1/1) ... [2023-11-06 20:35:00,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 20:35:00,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d3e129-ff54-4a34-b2eb-24c16f025ded/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:35:00,782 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d3e129-ff54-4a34-b2eb-24c16f025ded/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 20:35:00,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d3e129-ff54-4a34-b2eb-24c16f025ded/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 20:35:00,825 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 20:35:00,825 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 20:35:00,825 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 20:35:00,825 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 20:35:00,825 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 20:35:00,826 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 20:35:00,826 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 20:35:00,826 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 20:35:00,826 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-06 20:35:00,826 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-06 20:35:00,826 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-06 20:35:00,827 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-06 20:35:00,827 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 20:35:00,827 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2023-11-06 20:35:00,827 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2023-11-06 20:35:00,827 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2023-11-06 20:35:00,827 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2023-11-06 20:35:00,828 INFO L130 BoogieDeclarations]: Found specification of procedure thread7 [2023-11-06 20:35:00,828 INFO L138 BoogieDeclarations]: Found implementation of procedure thread7 [2023-11-06 20:35:00,828 INFO L130 BoogieDeclarations]: Found specification of procedure thread8 [2023-11-06 20:35:00,829 INFO L138 BoogieDeclarations]: Found implementation of procedure thread8 [2023-11-06 20:35:00,829 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 20:35:00,829 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 20:35:00,829 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 20:35:00,831 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 20:35:00,831 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 20:35:00,833 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 20:35:00,984 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 20:35:00,986 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 20:35:01,672 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 20:35:01,890 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 20:35:01,890 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-06 20:35:01,895 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 08:35:01 BoogieIcfgContainer [2023-11-06 20:35:01,895 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 20:35:01,898 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 20:35:01,898 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 20:35:01,901 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 20:35:01,902 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 08:35:00" (1/3) ... [2023-11-06 20:35:01,903 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3870d868 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 08:35:01, skipping insertion in model container [2023-11-06 20:35:01,903 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:35:00" (2/3) ... [2023-11-06 20:35:01,905 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3870d868 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 08:35:01, skipping insertion in model container [2023-11-06 20:35:01,905 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 08:35:01" (3/3) ... [2023-11-06 20:35:01,907 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-ticket-8.wvr.c [2023-11-06 20:35:01,925 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 20:35:01,925 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2023-11-06 20:35:01,925 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 20:35:02,029 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-11-06 20:35:02,082 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-06 20:35:02,112 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 304 places, 281 transitions, 618 flow [2023-11-06 20:35:02,115 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 304 places, 281 transitions, 618 flow [2023-11-06 20:35:02,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 304 places, 281 transitions, 618 flow [2023-11-06 20:35:02,242 INFO L124 PetriNetUnfolderBase]: 2/273 cut-off events. [2023-11-06 20:35:02,242 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-11-06 20:35:02,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 306 conditions, 273 events. 2/273 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 217 event pairs, 0 based on Foata normal form. 0/237 useless extension candidates. Maximal degree in co-relation 202. Up to 2 conditions per place. [2023-11-06 20:35:02,256 INFO L119 LiptonReduction]: Number of co-enabled transitions 7070 [2023-11-06 20:35:21,195 INFO L134 LiptonReduction]: Checked pairs total: 19366 [2023-11-06 20:35:21,196 INFO L136 LiptonReduction]: Total number of compositions: 257 [2023-11-06 20:35:21,205 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 117 places, 92 transitions, 240 flow [2023-11-06 20:35:26,167 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 65603 states, 65569 states have (on average 5.803580960514878) internal successors, (380535), 65602 states have internal predecessors, (380535), 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 20:35:26,192 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 20:35:26,199 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;@4e96dfec, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-06 20:35:26,200 INFO L358 AbstractCegarLoop]: Starting to check reachability of 42 error locations. [2023-11-06 20:35:26,302 INFO L276 IsEmpty]: Start isEmpty. Operand has 65603 states, 65569 states have (on average 5.803580960514878) internal successors, (380535), 65602 states have internal predecessors, (380535), 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 20:35:26,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2 [2023-11-06 20:35:26,483 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:35:26,483 INFO L195 NwaCegarLoop]: trace histogram [1] [2023-11-06 20:35:26,484 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-11-06 20:35:26,489 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:35:26,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1139, now seen corresponding path program 1 times [2023-11-06 20:35:26,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:35:26,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313931246] [2023-11-06 20:35:26,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:35:26,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:35:26,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:35:26,688 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 20:35:26,689 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:35:26,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313931246] [2023-11-06 20:35:26,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313931246] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:35:26,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:35:26,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-11-06 20:35:26,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608873687] [2023-11-06 20:35:26,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:35:26,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 20:35:26,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:35:26,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 20:35:26,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 20:35:26,900 INFO L87 Difference]: Start difference. First operand has 65603 states, 65569 states have (on average 5.803580960514878) internal successors, (380535), 65602 states have internal predecessors, (380535), 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 20:35:29,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:35:29,677 INFO L93 Difference]: Finished difference Result 65600 states and 380532 transitions. [2023-11-06 20:35:29,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 20:35:29,681 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 20:35:29,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted.