./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_08-cond_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f84e1b0-6558-4e69-bf9c-07de05f0568f/bin/uautomizer-verify-jihMAELWvX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f84e1b0-6558-4e69-bf9c-07de05f0568f/bin/uautomizer-verify-jihMAELWvX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f84e1b0-6558-4e69-bf9c-07de05f0568f/bin/uautomizer-verify-jihMAELWvX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f84e1b0-6558-4e69-bf9c-07de05f0568f/bin/uautomizer-verify-jihMAELWvX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_08-cond_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f84e1b0-6558-4e69-bf9c-07de05f0568f/bin/uautomizer-verify-jihMAELWvX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f84e1b0-6558-4e69-bf9c-07de05f0568f/bin/uautomizer-verify-jihMAELWvX --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b4439281d7e12bca3fd2bd39ebda4196e341f38fedf1c370a96bdabb4944cfe7 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-08 17:25:17,655 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 17:25:17,718 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f84e1b0-6558-4e69-bf9c-07de05f0568f/bin/uautomizer-verify-jihMAELWvX/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-08 17:25:17,722 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 17:25:17,722 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 17:25:17,743 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 17:25:17,743 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 17:25:17,744 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 17:25:17,744 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 17:25:17,745 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 17:25:17,745 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 17:25:17,745 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 17:25:17,746 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 17:25:17,747 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 17:25:17,747 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 17:25:17,748 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 17:25:17,748 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-08 17:25:17,748 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 17:25:17,749 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 17:25:17,749 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 17:25:17,750 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 17:25:17,757 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-08 17:25:17,757 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 17:25:17,757 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-08 17:25:17,758 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 17:25:17,758 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 17:25:17,758 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-08 17:25:17,759 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 17:25:17,759 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 17:25:17,760 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 17:25:17,760 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 17:25:17,761 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 17:25:17,761 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 17:25:17,765 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 17:25:17,766 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 17:25:17,766 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-08 17:25:17,766 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 17:25:17,767 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 17:25:17,767 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 17:25:17,767 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 17:25:17,768 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 17:25:17,768 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 17:25:17,769 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_4f84e1b0-6558-4e69-bf9c-07de05f0568f/bin/uautomizer-verify-jihMAELWvX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f84e1b0-6558-4e69-bf9c-07de05f0568f/bin/uautomizer-verify-jihMAELWvX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b4439281d7e12bca3fd2bd39ebda4196e341f38fedf1c370a96bdabb4944cfe7 [2024-11-08 17:25:18,053 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 17:25:18,078 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 17:25:18,082 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 17:25:18,084 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 17:25:18,084 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 17:25:18,085 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f84e1b0-6558-4e69-bf9c-07de05f0568f/bin/uautomizer-verify-jihMAELWvX/../../sv-benchmarks/c/goblint-regression/28-race_reach_08-cond_racefree.i Unable to find full path for "g++" [2024-11-08 17:25:20,180 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 17:25:20,426 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 17:25:20,426 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f84e1b0-6558-4e69-bf9c-07de05f0568f/sv-benchmarks/c/goblint-regression/28-race_reach_08-cond_racefree.i [2024-11-08 17:25:20,451 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f84e1b0-6558-4e69-bf9c-07de05f0568f/bin/uautomizer-verify-jihMAELWvX/data/caecbac8e/1b04f7d2c7334d5fafd5c9774149564e/FLAGbd2196e17 [2024-11-08 17:25:20,475 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f84e1b0-6558-4e69-bf9c-07de05f0568f/bin/uautomizer-verify-jihMAELWvX/data/caecbac8e/1b04f7d2c7334d5fafd5c9774149564e [2024-11-08 17:25:20,478 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 17:25:20,481 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 17:25:20,484 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 17:25:20,485 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 17:25:20,492 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 17:25:20,493 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 05:25:20" (1/1) ... [2024-11-08 17:25:20,494 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d4092be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:25:20, skipping insertion in model container [2024-11-08 17:25:20,496 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 05:25:20" (1/1) ... [2024-11-08 17:25:20,562 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 17:25:21,185 WARN L250 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_4f84e1b0-6558-4e69-bf9c-07de05f0568f/sv-benchmarks/c/goblint-regression/28-race_reach_08-cond_racefree.i[41322,41335] [2024-11-08 17:25:21,218 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 17:25:21,248 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 17:25:21,310 WARN L250 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_4f84e1b0-6558-4e69-bf9c-07de05f0568f/sv-benchmarks/c/goblint-regression/28-race_reach_08-cond_racefree.i[41322,41335] [2024-11-08 17:25:21,325 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 17:25:21,417 INFO L204 MainTranslator]: Completed translation [2024-11-08 17:25:21,418 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:25:21 WrapperNode [2024-11-08 17:25:21,418 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 17:25:21,419 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 17:25:21,420 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 17:25:21,420 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 17:25:21,428 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:25:21" (1/1) ... [2024-11-08 17:25:21,446 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:25:21" (1/1) ... [2024-11-08 17:25:21,475 INFO L138 Inliner]: procedures = 271, calls = 35, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 139 [2024-11-08 17:25:21,475 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 17:25:21,479 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 17:25:21,479 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 17:25:21,479 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 17:25:21,491 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:25:21" (1/1) ... [2024-11-08 17:25:21,491 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:25:21" (1/1) ... [2024-11-08 17:25:21,495 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:25:21" (1/1) ... [2024-11-08 17:25:21,526 INFO L175 MemorySlicer]: Split 14 memory accesses to 4 slices as follows [2, 5, 2, 5]. 36 percent of accesses are in the largest equivalence class. The 12 initializations are split as follows [2, 5, 0, 5]. The 1 writes are split as follows [0, 0, 1, 0]. [2024-11-08 17:25:21,526 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:25:21" (1/1) ... [2024-11-08 17:25:21,530 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:25:21" (1/1) ... [2024-11-08 17:25:21,545 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:25:21" (1/1) ... [2024-11-08 17:25:21,553 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:25:21" (1/1) ... [2024-11-08 17:25:21,555 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:25:21" (1/1) ... [2024-11-08 17:25:21,557 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:25:21" (1/1) ... [2024-11-08 17:25:21,564 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 17:25:21,564 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 17:25:21,565 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 17:25:21,565 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 17:25:21,566 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:25:21" (1/1) ... [2024-11-08 17:25:21,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 17:25:21,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f84e1b0-6558-4e69-bf9c-07de05f0568f/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:25:21,611 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f84e1b0-6558-4e69-bf9c-07de05f0568f/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-08 17:25:21,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f84e1b0-6558-4e69-bf9c-07de05f0568f/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-08 17:25:21,643 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-08 17:25:21,644 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-08 17:25:21,644 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-08 17:25:21,644 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-08 17:25:21,644 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-08 17:25:21,644 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-08 17:25:21,645 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-08 17:25:21,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-08 17:25:21,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-08 17:25:21,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-08 17:25:21,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-08 17:25:21,646 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-08 17:25:21,646 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 17:25:21,646 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-11-08 17:25:21,646 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-11-08 17:25:21,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-08 17:25:21,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-08 17:25:21,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-08 17:25:21,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-08 17:25:21,648 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 17:25:21,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 17:25:21,650 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-08 17:25:21,800 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 17:25:21,803 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 17:25:22,099 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-08 17:25:22,099 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 17:25:22,459 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 17:25:22,460 INFO L316 CfgBuilder]: Removed 8 assume(true) statements. [2024-11-08 17:25:22,460 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 05:25:22 BoogieIcfgContainer [2024-11-08 17:25:22,464 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 17:25:22,467 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 17:25:22,468 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 17:25:22,471 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 17:25:22,471 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 05:25:20" (1/3) ... [2024-11-08 17:25:22,473 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f8459c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 05:25:22, skipping insertion in model container [2024-11-08 17:25:22,473 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:25:21" (2/3) ... [2024-11-08 17:25:22,475 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f8459c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 05:25:22, skipping insertion in model container [2024-11-08 17:25:22,475 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 05:25:22" (3/3) ... [2024-11-08 17:25:22,476 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_08-cond_racefree.i [2024-11-08 17:25:22,496 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 17:25:22,497 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-08 17:25:22,497 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-08 17:25:22,548 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-11-08 17:25:22,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 62 transitions, 131 flow [2024-11-08 17:25:22,654 INFO L124 PetriNetUnfolderBase]: 23/95 cut-off events. [2024-11-08 17:25:22,654 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-08 17:25:22,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100 conditions, 95 events. 23/95 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 292 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 57. Up to 6 conditions per place. [2024-11-08 17:25:22,660 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 62 transitions, 131 flow [2024-11-08 17:25:22,664 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 49 places, 60 transitions, 124 flow [2024-11-08 17:25:22,674 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 17:25:22,681 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@1bf1cffe, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 17:25:22,681 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-08 17:25:22,693 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-08 17:25:22,694 INFO L124 PetriNetUnfolderBase]: 6/32 cut-off events. [2024-11-08 17:25:22,694 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-08 17:25:22,694 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:25:22,695 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2024-11-08 17:25:22,695 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-08 17:25:22,701 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:25:22,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1590153747, now seen corresponding path program 1 times [2024-11-08 17:25:22,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:25:22,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401598398] [2024-11-08 17:25:22,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:25:22,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:25:22,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-08 17:25:22,927 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-08 17:25:22,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-08 17:25:23,051 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-08 17:25:23,053 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-08 17:25:23,056 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2024-11-08 17:25:23,058 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2024-11-08 17:25:23,059 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-08 17:25:23,059 INFO L407 BasicCegarLoop]: Path program histogram: [1] [2024-11-08 17:25:23,067 WARN L244 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-08 17:25:23,067 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-08 17:25:23,104 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-08 17:25:23,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 70 places, 87 transitions, 190 flow [2024-11-08 17:25:23,163 INFO L124 PetriNetUnfolderBase]: 40/163 cut-off events. [2024-11-08 17:25:23,163 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-08 17:25:23,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175 conditions, 163 events. 40/163 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 597 event pairs, 0 based on Foata normal form. 0/116 useless extension candidates. Maximal degree in co-relation 99. Up to 9 conditions per place. [2024-11-08 17:25:23,167 INFO L82 GeneralOperation]: Start removeDead. Operand has 70 places, 87 transitions, 190 flow [2024-11-08 17:25:23,169 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 70 places, 87 transitions, 190 flow [2024-11-08 17:25:23,172 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 17:25:23,174 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@1bf1cffe, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 17:25:23,175 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-08 17:25:23,189 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-08 17:25:23,190 INFO L124 PetriNetUnfolderBase]: 7/45 cut-off events. [2024-11-08 17:25:23,190 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-08 17:25:23,190 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:25:23,190 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:25:23,191 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-08 17:25:23,191 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:25:23,192 INFO L85 PathProgramCache]: Analyzing trace with hash 378360144, now seen corresponding path program 1 times [2024-11-08 17:25:23,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:25:23,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277388674] [2024-11-08 17:25:23,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:25:23,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:25:23,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:25:23,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:25:23,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:25:23,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277388674] [2024-11-08 17:25:23,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277388674] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:25:23,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:25:23,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 17:25:23,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817203810] [2024-11-08 17:25:23,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:25:23,453 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 17:25:23,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:25:23,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 17:25:23,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 17:25:23,492 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 87 [2024-11-08 17:25:23,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 87 transitions, 190 flow. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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) [2024-11-08 17:25:23,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:25:23,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 87 [2024-11-08 17:25:23,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:25:24,592 INFO L124 PetriNetUnfolderBase]: 3231/6328 cut-off events. [2024-11-08 17:25:24,592 INFO L125 PetriNetUnfolderBase]: For 76/76 co-relation queries the response was YES. [2024-11-08 17:25:24,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11142 conditions, 6328 events. 3231/6328 cut-off events. For 76/76 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 48410 event pairs, 1236 based on Foata normal form. 1427/7316 useless extension candidates. Maximal degree in co-relation 1046. Up to 4745 conditions per place. [2024-11-08 17:25:24,628 INFO L140 encePairwiseOnDemand]: 68/87 looper letters, 41 selfloop transitions, 2 changer transitions 13/83 dead transitions. [2024-11-08 17:25:24,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 83 transitions, 282 flow [2024-11-08 17:25:24,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 17:25:24,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 17:25:24,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 172 transitions. [2024-11-08 17:25:24,642 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6590038314176245 [2024-11-08 17:25:24,644 INFO L175 Difference]: Start difference. First operand has 70 places, 87 transitions, 190 flow. Second operand 3 states and 172 transitions. [2024-11-08 17:25:24,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 83 transitions, 282 flow [2024-11-08 17:25:24,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 83 transitions, 282 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-08 17:25:24,653 INFO L231 Difference]: Finished difference. Result has 73 places, 60 transitions, 142 flow [2024-11-08 17:25:24,655 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=73, PETRI_TRANSITIONS=60} [2024-11-08 17:25:24,660 INFO L277 CegarLoopForPetriNet]: 70 programPoint places, 3 predicate places. [2024-11-08 17:25:24,660 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 60 transitions, 142 flow [2024-11-08 17:25:24,661 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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) [2024-11-08 17:25:24,661 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:25:24,661 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1] [2024-11-08 17:25:24,661 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-08 17:25:24,662 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-08 17:25:24,662 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:25:24,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1590833978, now seen corresponding path program 1 times [2024-11-08 17:25:24,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:25:24,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760956185] [2024-11-08 17:25:24,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:25:24,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:25:24,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-08 17:25:24,746 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-08 17:25:24,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-08 17:25:24,776 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-08 17:25:24,777 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-08 17:25:24,777 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2024-11-08 17:25:24,777 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2024-11-08 17:25:24,778 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-08 17:25:24,778 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1] [2024-11-08 17:25:24,779 WARN L244 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-08 17:25:24,779 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-11-08 17:25:24,873 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-08 17:25:24,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 90 places, 112 transitions, 251 flow [2024-11-08 17:25:24,909 INFO L124 PetriNetUnfolderBase]: 62/248 cut-off events. [2024-11-08 17:25:24,910 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-11-08 17:25:24,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 273 conditions, 248 events. 62/248 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 969 event pairs, 1 based on Foata normal form. 0/178 useless extension candidates. Maximal degree in co-relation 174. Up to 16 conditions per place. [2024-11-08 17:25:24,916 INFO L82 GeneralOperation]: Start removeDead. Operand has 90 places, 112 transitions, 251 flow [2024-11-08 17:25:24,919 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 90 places, 112 transitions, 251 flow [2024-11-08 17:25:24,923 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 17:25:24,924 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@1bf1cffe, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 17:25:24,925 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-08 17:25:24,932 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-08 17:25:24,933 INFO L124 PetriNetUnfolderBase]: 7/45 cut-off events. [2024-11-08 17:25:24,933 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-08 17:25:24,933 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:25:24,933 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:25:24,934 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-08 17:25:24,935 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:25:24,935 INFO L85 PathProgramCache]: Analyzing trace with hash 828020560, now seen corresponding path program 1 times [2024-11-08 17:25:24,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:25:24,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230160836] [2024-11-08 17:25:24,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:25:24,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:25:24,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:25:25,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:25:25,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:25:25,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230160836] [2024-11-08 17:25:25,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230160836] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:25:25,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:25:25,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 17:25:25,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884701521] [2024-11-08 17:25:25,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:25:25,048 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 17:25:25,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:25:25,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 17:25:25,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 17:25:25,059 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 112 [2024-11-08 17:25:25,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 112 transitions, 251 flow. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 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) [2024-11-08 17:25:25,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:25:25,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 112 [2024-11-08 17:25:25,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:25:33,617 INFO L124 PetriNetUnfolderBase]: 49990/80007 cut-off events. [2024-11-08 17:25:33,617 INFO L125 PetriNetUnfolderBase]: For 1193/1193 co-relation queries the response was YES. [2024-11-08 17:25:33,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147983 conditions, 80007 events. 49990/80007 cut-off events. For 1193/1193 co-relation queries the response was YES. Maximal size of possible extension queue 2155. Compared 691059 event pairs, 42241 based on Foata normal form. 21474/97749 useless extension candidates. Maximal degree in co-relation 75140. Up to 67165 conditions per place. [2024-11-08 17:25:33,996 INFO L140 encePairwiseOnDemand]: 87/112 looper letters, 51 selfloop transitions, 2 changer transitions 14/102 dead transitions. [2024-11-08 17:25:33,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 102 transitions, 353 flow [2024-11-08 17:25:33,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 17:25:33,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 17:25:33,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 213 transitions. [2024-11-08 17:25:34,000 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6339285714285714 [2024-11-08 17:25:34,002 INFO L175 Difference]: Start difference. First operand has 90 places, 112 transitions, 251 flow. Second operand 3 states and 213 transitions. [2024-11-08 17:25:34,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 102 transitions, 353 flow [2024-11-08 17:25:34,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 102 transitions, 353 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-08 17:25:34,018 INFO L231 Difference]: Finished difference. Result has 93 places, 78 transitions, 186 flow [2024-11-08 17:25:34,019 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=112, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=186, PETRI_PLACES=93, PETRI_TRANSITIONS=78} [2024-11-08 17:25:34,020 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 3 predicate places. [2024-11-08 17:25:34,021 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 78 transitions, 186 flow [2024-11-08 17:25:34,021 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 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) [2024-11-08 17:25:34,021 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:25:34,021 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:25:34,022 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-08 17:25:34,022 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-08 17:25:34,023 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:25:34,023 INFO L85 PathProgramCache]: Analyzing trace with hash -669536431, now seen corresponding path program 1 times [2024-11-08 17:25:34,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:25:34,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868769455] [2024-11-08 17:25:34,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:25:34,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:25:34,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:25:34,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:25:34,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:25:34,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868769455] [2024-11-08 17:25:34,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868769455] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:25:34,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259984817] [2024-11-08 17:25:34,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:25:34,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:25:34,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f84e1b0-6558-4e69-bf9c-07de05f0568f/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:25:34,162 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f84e1b0-6558-4e69-bf9c-07de05f0568f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:25:34,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f84e1b0-6558-4e69-bf9c-07de05f0568f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-08 17:25:34,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:25:34,349 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-08 17:25:34,351 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:25:34,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 17:25:34,375 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 17:25:34,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259984817] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:25:34,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-08 17:25:34,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2024-11-08 17:25:34,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845644916] [2024-11-08 17:25:34,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:25:34,377 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 17:25:34,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:25:34,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 17:25:34,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-08 17:25:34,394 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 112 [2024-11-08 17:25:34,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 78 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 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) [2024-11-08 17:25:34,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:25:34,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 112 [2024-11-08 17:25:34,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:25:40,080 INFO L124 PetriNetUnfolderBase]: 43512/69297 cut-off events. [2024-11-08 17:25:40,080 INFO L125 PetriNetUnfolderBase]: For 1847/1847 co-relation queries the response was YES. [2024-11-08 17:25:40,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131087 conditions, 69297 events. 43512/69297 cut-off events. For 1847/1847 co-relation queries the response was YES. Maximal size of possible extension queue 1883. Compared 590632 event pairs, 33669 based on Foata normal form. 0/65145 useless extension candidates. Maximal degree in co-relation 104036. Up to 46992 conditions per place. [2024-11-08 17:25:40,457 INFO L140 encePairwiseOnDemand]: 109/112 looper letters, 41 selfloop transitions, 0 changer transitions 35/107 dead transitions. [2024-11-08 17:25:40,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 107 transitions, 392 flow [2024-11-08 17:25:40,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 17:25:40,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 17:25:40,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 185 transitions. [2024-11-08 17:25:40,462 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5505952380952381 [2024-11-08 17:25:40,464 INFO L175 Difference]: Start difference. First operand has 93 places, 78 transitions, 186 flow. Second operand 3 states and 185 transitions. [2024-11-08 17:25:40,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 107 transitions, 392 flow [2024-11-08 17:25:40,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 107 transitions, 388 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-08 17:25:40,471 INFO L231 Difference]: Finished difference. Result has 86 places, 72 transitions, 172 flow [2024-11-08 17:25:40,471 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=112, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=172, PETRI_PLACES=86, PETRI_TRANSITIONS=72} [2024-11-08 17:25:40,472 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, -4 predicate places. [2024-11-08 17:25:40,472 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 72 transitions, 172 flow [2024-11-08 17:25:40,472 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 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) [2024-11-08 17:25:40,473 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:25:40,473 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:25:40,493 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f84e1b0-6558-4e69-bf9c-07de05f0568f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-08 17:25:40,673 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f84e1b0-6558-4e69-bf9c-07de05f0568f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:25:40,674 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-08 17:25:40,675 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:25:40,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1719635798, now seen corresponding path program 1 times [2024-11-08 17:25:40,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:25:40,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747780367] [2024-11-08 17:25:40,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:25:40,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:25:40,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:25:41,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:25:41,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:25:41,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747780367] [2024-11-08 17:25:41,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747780367] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:25:41,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916408092] [2024-11-08 17:25:41,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:25:41,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:25:41,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f84e1b0-6558-4e69-bf9c-07de05f0568f/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:25:41,130 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f84e1b0-6558-4e69-bf9c-07de05f0568f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:25:41,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f84e1b0-6558-4e69-bf9c-07de05f0568f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-08 17:25:41,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:25:41,366 INFO L255 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-08 17:25:41,367 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:25:41,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:25:41,411 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:25:41,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:25:41,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916408092] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:25:41,442 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:25:41,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-08 17:25:41,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731890936] [2024-11-08 17:25:41,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:25:41,443 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-08 17:25:41,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:25:41,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-08 17:25:41,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-08 17:25:41,453 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 112 [2024-11-08 17:25:41,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 72 transitions, 172 flow. Second operand has 7 states, 7 states have (on average 43.142857142857146) internal successors, (302), 7 states have internal predecessors, (302), 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) [2024-11-08 17:25:41,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:25:41,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 112 [2024-11-08 17:25:41,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:25:43,078 INFO L124 PetriNetUnfolderBase]: 10557/18099 cut-off events. [2024-11-08 17:25:43,078 INFO L125 PetriNetUnfolderBase]: For 3848/3848 co-relation queries the response was YES. [2024-11-08 17:25:43,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34550 conditions, 18099 events. 10557/18099 cut-off events. For 3848/3848 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 140247 event pairs, 1908 based on Foata normal form. 2220/20159 useless extension candidates. Maximal degree in co-relation 34542. Up to 11100 conditions per place. [2024-11-08 17:25:43,167 INFO L140 encePairwiseOnDemand]: 108/112 looper letters, 92 selfloop transitions, 4 changer transitions 0/121 dead transitions. [2024-11-08 17:25:43,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 121 transitions, 458 flow [2024-11-08 17:25:43,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 17:25:43,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-08 17:25:43,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 342 transitions. [2024-11-08 17:25:43,169 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5089285714285714 [2024-11-08 17:25:43,169 INFO L175 Difference]: Start difference. First operand has 86 places, 72 transitions, 172 flow. Second operand 6 states and 342 transitions. [2024-11-08 17:25:43,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 121 transitions, 458 flow [2024-11-08 17:25:43,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 121 transitions, 458 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-08 17:25:43,184 INFO L231 Difference]: Finished difference. Result has 75 places, 61 transitions, 154 flow [2024-11-08 17:25:43,185 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=112, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=154, PETRI_PLACES=75, PETRI_TRANSITIONS=61} [2024-11-08 17:25:43,187 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, -15 predicate places. [2024-11-08 17:25:43,187 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 61 transitions, 154 flow [2024-11-08 17:25:43,188 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 43.142857142857146) internal successors, (302), 7 states have internal predecessors, (302), 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) [2024-11-08 17:25:43,188 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:25:43,188 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1] [2024-11-08 17:25:43,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f84e1b0-6558-4e69-bf9c-07de05f0568f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-08 17:25:43,392 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f84e1b0-6558-4e69-bf9c-07de05f0568f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-08 17:25:43,393 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-08 17:25:43,393 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:25:43,393 INFO L85 PathProgramCache]: Analyzing trace with hash 290805966, now seen corresponding path program 1 times [2024-11-08 17:25:43,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:25:43,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301505896] [2024-11-08 17:25:43,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:25:43,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:25:43,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-08 17:25:43,443 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-08 17:25:43,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-08 17:25:43,475 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-08 17:25:43,475 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-08 17:25:43,476 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2024-11-08 17:25:43,476 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2024-11-08 17:25:43,476 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-08 17:25:43,476 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-11-08 17:25:43,477 WARN L244 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-08 17:25:43,477 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-11-08 17:25:43,514 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-08 17:25:43,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 110 places, 137 transitions, 314 flow [2024-11-08 17:25:43,551 INFO L124 PetriNetUnfolderBase]: 96/369 cut-off events. [2024-11-08 17:25:43,552 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2024-11-08 17:25:43,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 420 conditions, 369 events. 96/369 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1534 event pairs, 6 based on Foata normal form. 0/268 useless extension candidates. Maximal degree in co-relation 272. Up to 32 conditions per place. [2024-11-08 17:25:43,555 INFO L82 GeneralOperation]: Start removeDead. Operand has 110 places, 137 transitions, 314 flow [2024-11-08 17:25:43,558 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 110 places, 137 transitions, 314 flow [2024-11-08 17:25:43,560 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 17:25:43,560 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@1bf1cffe, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 17:25:43,560 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-08 17:25:43,565 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-08 17:25:43,565 INFO L124 PetriNetUnfolderBase]: 7/45 cut-off events. [2024-11-08 17:25:43,565 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-08 17:25:43,566 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:25:43,566 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:25:43,566 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-08 17:25:43,566 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:25:43,567 INFO L85 PathProgramCache]: Analyzing trace with hash 496049392, now seen corresponding path program 1 times [2024-11-08 17:25:43,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:25:43,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838516997] [2024-11-08 17:25:43,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:25:43,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:25:43,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:25:43,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:25:43,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:25:43,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838516997] [2024-11-08 17:25:43,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838516997] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:25:43,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:25:43,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 17:25:43,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687199327] [2024-11-08 17:25:43,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:25:43,624 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 17:25:43,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:25:43,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 17:25:43,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 17:25:43,630 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 137 [2024-11-08 17:25:43,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 137 transitions, 314 flow. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 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) [2024-11-08 17:25:43,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:25:43,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 137 [2024-11-08 17:25:43,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand