./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43af5a6-0e44-4212-9c15-2daa71bf427c/bin/uautomizer-verify-84ZbGMXZE1/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43af5a6-0e44-4212-9c15-2daa71bf427c/bin/uautomizer-verify-84ZbGMXZE1/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43af5a6-0e44-4212-9c15-2daa71bf427c/bin/uautomizer-verify-84ZbGMXZE1/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43af5a6-0e44-4212-9c15-2daa71bf427c/bin/uautomizer-verify-84ZbGMXZE1/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43af5a6-0e44-4212-9c15-2daa71bf427c/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43af5a6-0e44-4212-9c15-2daa71bf427c/bin/uautomizer-verify-84ZbGMXZE1 --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 4e7050d36e2131966739d0040816e49ede1f1e8b3b668f65d41876950193b1d8 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-12-02 15:50:58,748 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-12-02 15:50:58,804 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43af5a6-0e44-4212-9c15-2daa71bf427c/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-12-02 15:50:58,808 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-12-02 15:50:58,809 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-12-02 15:50:58,831 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-12-02 15:50:58,831 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-12-02 15:50:58,831 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-12-02 15:50:58,832 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-12-02 15:50:58,832 INFO L153 SettingsManager]: * Use memory slicer=true [2024-12-02 15:50:58,832 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-12-02 15:50:58,832 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-12-02 15:50:58,832 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-12-02 15:50:58,832 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-12-02 15:50:58,833 INFO L153 SettingsManager]: * Use SBE=true [2024-12-02 15:50:58,833 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-12-02 15:50:58,833 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-12-02 15:50:58,833 INFO L153 SettingsManager]: * sizeof long=4 [2024-12-02 15:50:58,833 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-12-02 15:50:58,833 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-12-02 15:50:58,833 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-12-02 15:50:58,833 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-12-02 15:50:58,833 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-12-02 15:50:58,833 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-12-02 15:50:58,834 INFO L153 SettingsManager]: * sizeof long double=12 [2024-12-02 15:50:58,834 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-12-02 15:50:58,834 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-12-02 15:50:58,834 INFO L153 SettingsManager]: * Use constant arrays=true [2024-12-02 15:50:58,834 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-12-02 15:50:58,834 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 15:50:58,834 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 15:50:58,834 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 15:50:58,834 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 15:50:58,834 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-12-02 15:50:58,834 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 15:50:58,834 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 15:50:58,835 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 15:50:58,835 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 15:50:58,835 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-12-02 15:50:58,835 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-12-02 15:50:58,835 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-12-02 15:50:58,835 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-12-02 15:50:58,835 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-12-02 15:50:58,835 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-12-02 15:50:58,835 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-12-02 15:50:58,835 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-12-02 15:50:58,836 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-12-02 15:50:58,836 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-12-02 15:50:58,836 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_c43af5a6-0e44-4212-9c15-2daa71bf427c/bin/uautomizer-verify-84ZbGMXZE1 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 -> 4e7050d36e2131966739d0040816e49ede1f1e8b3b668f65d41876950193b1d8 [2024-12-02 15:50:59,060 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-12-02 15:50:59,068 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-12-02 15:50:59,070 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-12-02 15:50:59,071 INFO L270 PluginConnector]: Initializing CDTParser... [2024-12-02 15:50:59,072 INFO L274 PluginConnector]: CDTParser initialized [2024-12-02 15:50:59,073 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43af5a6-0e44-4212-9c15-2daa71bf427c/bin/uautomizer-verify-84ZbGMXZE1/../../sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing.i [2024-12-02 15:51:01,703 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43af5a6-0e44-4212-9c15-2daa71bf427c/bin/uautomizer-verify-84ZbGMXZE1/data/f263f1798/0b883f4e436746719df152c4f85536c0/FLAG6a8027ad4 [2024-12-02 15:51:01,921 INFO L384 CDTParser]: Found 1 translation units. [2024-12-02 15:51:01,922 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43af5a6-0e44-4212-9c15-2daa71bf427c/sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing.i [2024-12-02 15:51:01,937 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43af5a6-0e44-4212-9c15-2daa71bf427c/bin/uautomizer-verify-84ZbGMXZE1/data/f263f1798/0b883f4e436746719df152c4f85536c0/FLAG6a8027ad4 [2024-12-02 15:51:01,952 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43af5a6-0e44-4212-9c15-2daa71bf427c/bin/uautomizer-verify-84ZbGMXZE1/data/f263f1798/0b883f4e436746719df152c4f85536c0 [2024-12-02 15:51:01,954 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-12-02 15:51:01,956 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-12-02 15:51:01,957 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-12-02 15:51:01,957 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-12-02 15:51:01,961 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-12-02 15:51:01,962 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 03:51:01" (1/1) ... [2024-12-02 15:51:01,963 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3538c1df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:51:01, skipping insertion in model container [2024-12-02 15:51:01,963 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 03:51:01" (1/1) ... [2024-12-02 15:51:01,993 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-12-02 15:51:02,329 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_c43af5a6-0e44-4212-9c15-2daa71bf427c/sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing.i[47038,47051] [2024-12-02 15:51:02,361 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 15:51:02,514 INFO L200 MainTranslator]: Completed pre-run [2024-12-02 15:51:02,567 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_c43af5a6-0e44-4212-9c15-2daa71bf427c/sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing.i[47038,47051] [2024-12-02 15:51:02,581 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 15:51:02,652 INFO L204 MainTranslator]: Completed translation [2024-12-02 15:51:02,652 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:51:02 WrapperNode [2024-12-02 15:51:02,652 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-12-02 15:51:02,653 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-12-02 15:51:02,653 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-12-02 15:51:02,653 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-12-02 15:51:02,658 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:51:02" (1/1) ... [2024-12-02 15:51:02,687 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:51:02" (1/1) ... [2024-12-02 15:51:02,757 INFO L138 Inliner]: procedures = 280, calls = 1605, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 1783 [2024-12-02 15:51:02,758 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-12-02 15:51:02,758 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-12-02 15:51:02,758 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-12-02 15:51:02,758 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-12-02 15:51:02,766 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:51:02" (1/1) ... [2024-12-02 15:51:02,766 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:51:02" (1/1) ... [2024-12-02 15:51:02,776 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:51:02" (1/1) ... [2024-12-02 15:51:02,809 INFO L175 MemorySlicer]: Split 1569 memory accesses to 8 slices as follows [2, 5, 259, 14, 5, 1280, 2, 2]. 82 percent of accesses are in the largest equivalence class. The 1548 initializations are split as follows [2, 5, 256, 0, 5, 1280, 0, 0]. The 11 writes are split as follows [0, 0, 1, 8, 0, 0, 1, 1]. [2024-12-02 15:51:02,809 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:51:02" (1/1) ... [2024-12-02 15:51:02,809 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:51:02" (1/1) ... [2024-12-02 15:51:02,849 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:51:02" (1/1) ... [2024-12-02 15:51:02,855 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:51:02" (1/1) ... [2024-12-02 15:51:02,859 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:51:02" (1/1) ... [2024-12-02 15:51:02,868 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:51:02" (1/1) ... [2024-12-02 15:51:02,873 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:51:02" (1/1) ... [2024-12-02 15:51:02,909 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-12-02 15:51:02,910 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-12-02 15:51:02,910 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-12-02 15:51:02,910 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-12-02 15:51:02,911 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:51:02" (1/1) ... [2024-12-02 15:51:02,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 15:51:02,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43af5a6-0e44-4212-9c15-2daa71bf427c/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:51:02,934 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43af5a6-0e44-4212-9c15-2daa71bf427c/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-12-02 15:51:02,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43af5a6-0e44-4212-9c15-2daa71bf427c/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-12-02 15:51:02,956 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-12-02 15:51:02,956 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-12-02 15:51:02,956 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-12-02 15:51:02,956 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-12-02 15:51:02,956 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2024-12-02 15:51:02,956 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#4 [2024-12-02 15:51:02,956 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#5 [2024-12-02 15:51:02,956 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#6 [2024-12-02 15:51:02,956 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#7 [2024-12-02 15:51:02,956 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2024-12-02 15:51:02,956 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2024-12-02 15:51:02,957 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-12-02 15:51:02,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-12-02 15:51:02,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-12-02 15:51:02,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-12-02 15:51:02,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2024-12-02 15:51:02,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#4 [2024-12-02 15:51:02,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#5 [2024-12-02 15:51:02,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#6 [2024-12-02 15:51:02,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#7 [2024-12-02 15:51:02,957 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-12-02 15:51:02,957 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-12-02 15:51:02,957 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-12-02 15:51:02,958 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-12-02 15:51:02,958 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-12-02 15:51:02,958 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-12-02 15:51:02,958 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-12-02 15:51:02,958 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-12-02 15:51:02,958 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2024-12-02 15:51:02,958 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2024-12-02 15:51:02,958 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2024-12-02 15:51:02,958 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-12-02 15:51:02,958 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-12-02 15:51:02,958 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-12-02 15:51:02,958 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-12-02 15:51:02,958 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-12-02 15:51:02,958 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-12-02 15:51:02,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-12-02 15:51:02,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2024-12-02 15:51:02,959 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-12-02 15:51:02,959 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-12-02 15:51:02,959 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-12-02 15:51:02,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-12-02 15:51:02,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-12-02 15:51:02,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-12-02 15:51:02,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2024-12-02 15:51:02,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#4 [2024-12-02 15:51:02,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#5 [2024-12-02 15:51:02,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#6 [2024-12-02 15:51:02,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#7 [2024-12-02 15:51:02,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-12-02 15:51:02,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-12-02 15:51:02,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-12-02 15:51:02,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-12-02 15:51:02,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-12-02 15:51:02,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-12-02 15:51:02,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-12-02 15:51:02,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2024-12-02 15:51:02,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-12-02 15:51:02,960 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-12-02 15:51:02,962 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-12-02 15:51:03,121 INFO L234 CfgBuilder]: Building ICFG [2024-12-02 15:51:03,123 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-12-02 15:51:05,078 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-12-02 15:51:05,078 INFO L283 CfgBuilder]: Performing block encoding [2024-12-02 15:51:35,545 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-12-02 15:51:35,546 INFO L312 CfgBuilder]: Removed 11 assume(true) statements. [2024-12-02 15:51:35,546 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 03:51:35 BoogieIcfgContainer [2024-12-02 15:51:35,546 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-12-02 15:51:35,548 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-12-02 15:51:35,548 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-12-02 15:51:35,552 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-12-02 15:51:35,553 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 03:51:01" (1/3) ... [2024-12-02 15:51:35,553 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c7e8d29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 03:51:35, skipping insertion in model container [2024-12-02 15:51:35,553 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:51:02" (2/3) ... [2024-12-02 15:51:35,553 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c7e8d29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 03:51:35, skipping insertion in model container [2024-12-02 15:51:35,553 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 03:51:35" (3/3) ... [2024-12-02 15:51:35,554 INFO L128 eAbstractionObserver]: Analyzing ICFG 28-race_reach_86-lists_racing.i [2024-12-02 15:51:35,565 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-12-02 15:51:35,566 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG 28-race_reach_86-lists_racing.i that has 3 procedures, 57 locations, 1 initial locations, 11 loop locations, and 1 error locations. [2024-12-02 15:51:35,567 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-12-02 15:51:35,658 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-12-02 15:51:35,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 63 places, 77 transitions, 174 flow [2024-12-02 15:51:35,963 INFO L124 PetriNetUnfolderBase]: 37/157 cut-off events. [2024-12-02 15:51:35,965 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-12-02 15:51:35,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174 conditions, 157 events. 37/157 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 584 event pairs, 0 based on Foata normal form. 0/112 useless extension candidates. Maximal degree in co-relation 80. Up to 8 conditions per place. [2024-12-02 15:51:35,970 INFO L82 GeneralOperation]: Start removeDead. Operand has 63 places, 77 transitions, 174 flow [2024-12-02 15:51:35,974 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 63 places, 75 transitions, 164 flow [2024-12-02 15:51:35,982 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-12-02 15:51:35,994 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;@567f303a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-12-02 15:51:35,994 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-12-02 15:51:36,066 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-12-02 15:51:36,066 INFO L124 PetriNetUnfolderBase]: 1/21 cut-off events. [2024-12-02 15:51:36,066 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-12-02 15:51:36,066 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 15:51:36,067 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-12-02 15:51:36,067 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 15:51:36,072 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:51:36,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1106662295, now seen corresponding path program 1 times [2024-12-02 15:51:36,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:51:36,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008938152] [2024-12-02 15:51:36,080 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 15:51:36,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:51:36,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:51:36,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 15:51:36,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:51:36,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008938152] [2024-12-02 15:51:36,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008938152] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 15:51:36,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 15:51:36,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 15:51:36,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554821826] [2024-12-02 15:51:36,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 15:51:36,934 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 15:51:36,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:51:36,960 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 15:51:36,961 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 15:51:36,962 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 77 [2024-12-02 15:51:36,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 75 transitions, 164 flow. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 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) [2024-12-02 15:51:36,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 15:51:36,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 77 [2024-12-02 15:51:36,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 15:51:37,608 INFO L124 PetriNetUnfolderBase]: 2345/4513 cut-off events. [2024-12-02 15:51:37,609 INFO L125 PetriNetUnfolderBase]: For 135/135 co-relation queries the response was YES. [2024-12-02 15:51:37,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8335 conditions, 4513 events. 2345/4513 cut-off events. For 135/135 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 27583 event pairs, 2178 based on Foata normal form. 406/4211 useless extension candidates. Maximal degree in co-relation 7102. Up to 3752 conditions per place. [2024-12-02 15:51:37,627 INFO L140 encePairwiseOnDemand]: 62/77 looper letters, 47 selfloop transitions, 2 changer transitions 0/64 dead transitions. [2024-12-02 15:51:37,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 64 transitions, 240 flow [2024-12-02 15:51:37,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 15:51:37,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 15:51:37,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 107 transitions. [2024-12-02 15:51:37,638 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46320346320346323 [2024-12-02 15:51:37,640 INFO L175 Difference]: Start difference. First operand has 63 places, 75 transitions, 164 flow. Second operand 3 states and 107 transitions. [2024-12-02 15:51:37,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 64 transitions, 240 flow [2024-12-02 15:51:37,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 64 transitions, 240 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-12-02 15:51:37,649 INFO L231 Difference]: Finished difference. Result has 66 places, 64 transitions, 152 flow [2024-12-02 15:51:37,651 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=66, PETRI_TRANSITIONS=64} [2024-12-02 15:51:37,653 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 3 predicate places. [2024-12-02 15:51:37,653 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 64 transitions, 152 flow [2024-12-02 15:51:37,653 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 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) [2024-12-02 15:51:37,653 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 15:51:37,653 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-12-02 15:51:37,654 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-12-02 15:51:37,654 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 15:51:37,654 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:51:37,654 INFO L85 PathProgramCache]: Analyzing trace with hash -432936125, now seen corresponding path program 1 times [2024-12-02 15:51:37,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:51:37,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805132116] [2024-12-02 15:51:37,655 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 15:51:37,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:51:37,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:51:38,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 15:51:38,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:51:38,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805132116] [2024-12-02 15:51:38,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805132116] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:51:38,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560450183] [2024-12-02 15:51:38,031 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 15:51:38,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:51:38,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43af5a6-0e44-4212-9c15-2daa71bf427c/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:51:38,035 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43af5a6-0e44-4212-9c15-2daa71bf427c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:51:38,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43af5a6-0e44-4212-9c15-2daa71bf427c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-12-02 15:51:38,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:51:38,694 INFO L256 TraceCheckSpWp]: Trace formula consists of 3764 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-12-02 15:51:38,698 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:51:38,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 15:51:38,725 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:51:38,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 15:51:38,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560450183] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:51:38,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 15:51:38,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-12-02 15:51:38,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717072334] [2024-12-02 15:51:38,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 15:51:38,746 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-02 15:51:38,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:51:38,747 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-02 15:51:38,747 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-12-02 15:51:38,747 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 77 [2024-12-02 15:51:38,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 64 transitions, 152 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 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) [2024-12-02 15:51:38,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 15:51:38,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 77 [2024-12-02 15:51:38,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 15:51:39,420 INFO L124 PetriNetUnfolderBase]: 2345/4516 cut-off events. [2024-12-02 15:51:39,420 INFO L125 PetriNetUnfolderBase]: For 135/135 co-relation queries the response was YES. [2024-12-02 15:51:39,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8351 conditions, 4516 events. 2345/4516 cut-off events. For 135/135 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 27557 event pairs, 2178 based on Foata normal form. 0/3808 useless extension candidates. Maximal degree in co-relation 8338. Up to 3752 conditions per place. [2024-12-02 15:51:39,444 INFO L140 encePairwiseOnDemand]: 74/77 looper letters, 47 selfloop transitions, 5 changer transitions 0/67 dead transitions. [2024-12-02 15:51:39,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 67 transitions, 268 flow [2024-12-02 15:51:39,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 15:51:39,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-12-02 15:51:39,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-12-02 15:51:39,446 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.31385281385281383 [2024-12-02 15:51:39,446 INFO L175 Difference]: Start difference. First operand has 66 places, 64 transitions, 152 flow. Second operand 6 states and 145 transitions. [2024-12-02 15:51:39,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 67 transitions, 268 flow [2024-12-02 15:51:39,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 67 transitions, 264 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-12-02 15:51:39,449 INFO L231 Difference]: Finished difference. Result has 73 places, 67 transitions, 184 flow [2024-12-02 15:51:39,449 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=184, PETRI_PLACES=73, PETRI_TRANSITIONS=67} [2024-12-02 15:51:39,450 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 10 predicate places. [2024-12-02 15:51:39,450 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 67 transitions, 184 flow [2024-12-02 15:51:39,450 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 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) [2024-12-02 15:51:39,450 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 15:51:39,450 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2024-12-02 15:51:39,466 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43af5a6-0e44-4212-9c15-2daa71bf427c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-12-02 15:51:39,651 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43af5a6-0e44-4212-9c15-2daa71bf427c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:51:39,651 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 15:51:39,651 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:51:39,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1073012375, now seen corresponding path program 2 times [2024-12-02 15:51:39,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:51:39,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018751017] [2024-12-02 15:51:39,652 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 15:51:39,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:51:39,797 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 15:51:39,797 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:51:40,339 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 15:51:40,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:51:40,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018751017] [2024-12-02 15:51:40,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018751017] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:51:40,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087853986] [2024-12-02 15:51:40,339 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 15:51:40,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:51:40,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43af5a6-0e44-4212-9c15-2daa71bf427c/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:51:40,342 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43af5a6-0e44-4212-9c15-2daa71bf427c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:51:40,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43af5a6-0e44-4212-9c15-2daa71bf427c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-12-02 15:51:41,020 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 15:51:41,020 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:51:41,037 INFO L256 TraceCheckSpWp]: Trace formula consists of 3917 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-12-02 15:51:41,040 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:51:41,057 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 15:51:41,058 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:51:41,117 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 15:51:41,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087853986] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:51:41,118 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 15:51:41,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-12-02 15:51:41,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369242240] [2024-12-02 15:51:41,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 15:51:41,118 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-12-02 15:51:41,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:51:41,119 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-12-02 15:51:41,119 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-12-02 15:51:41,119 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 77 [2024-12-02 15:51:41,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 67 transitions, 184 flow. Second operand has 13 states, 13 states have (on average 16.307692307692307) internal successors, (212), 13 states have internal predecessors, (212), 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) [2024-12-02 15:51:41,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 15:51:41,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 77 [2024-12-02 15:51:41,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 15:51:41,787 INFO L124 PetriNetUnfolderBase]: 2345/4522 cut-off events. [2024-12-02 15:51:41,787 INFO L125 PetriNetUnfolderBase]: For 155/155 co-relation queries the response was YES. [2024-12-02 15:51:41,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8388 conditions, 4522 events. 2345/4522 cut-off events. For 155/155 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 27571 event pairs, 2178 based on Foata normal form. 6/3821 useless extension candidates. Maximal degree in co-relation 8329. Up to 3752 conditions per place. [2024-12-02 15:51:41,814 INFO L140 encePairwiseOnDemand]: 74/77 looper letters, 47 selfloop transitions, 11 changer transitions 0/73 dead transitions. [2024-12-02 15:51:41,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 73 transitions, 336 flow [2024-12-02 15:51:41,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-12-02 15:51:41,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-12-02 15:51:41,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 244 transitions. [2024-12-02 15:51:41,817 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.26406926406926406 [2024-12-02 15:51:41,817 INFO L175 Difference]: Start difference. First operand has 73 places, 67 transitions, 184 flow. Second operand 12 states and 244 transitions. [2024-12-02 15:51:41,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 73 transitions, 336 flow [2024-12-02 15:51:41,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 73 transitions, 322 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-12-02 15:51:41,820 INFO L231 Difference]: Finished difference. Result has 89 places, 73 transitions, 254 flow [2024-12-02 15:51:41,821 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=254, PETRI_PLACES=89, PETRI_TRANSITIONS=73} [2024-12-02 15:51:41,821 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 26 predicate places. [2024-12-02 15:51:41,821 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 73 transitions, 254 flow [2024-12-02 15:51:41,822 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 16.307692307692307) internal successors, (212), 13 states have internal predecessors, (212), 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) [2024-12-02 15:51:41,822 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 15:51:41,822 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2024-12-02 15:51:41,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43af5a6-0e44-4212-9c15-2daa71bf427c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-12-02 15:51:42,022 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43af5a6-0e44-4212-9c15-2daa71bf427c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:51:42,023 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 15:51:42,023 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:51:42,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1268473623, now seen corresponding path program 3 times [2024-12-02 15:51:42,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:51:42,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983566224] [2024-12-02 15:51:42,023 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 15:51:42,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:51:42,491 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-12-02 15:51:42,491 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:51:43,368 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 15:51:43,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:51:43,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983566224] [2024-12-02 15:51:43,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983566224] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:51:43,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329639584] [2024-12-02 15:51:43,369 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 15:51:43,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:51:43,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43af5a6-0e44-4212-9c15-2daa71bf427c/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:51:43,371 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43af5a6-0e44-4212-9c15-2daa71bf427c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:51:43,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43af5a6-0e44-4212-9c15-2daa71bf427c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-12-02 15:51:55,111 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-12-02 15:51:55,111 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:51:55,132 INFO L256 TraceCheckSpWp]: Trace formula consists of 4223 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-12-02 15:51:55,134 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:51:55,185 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 15:51:55,185 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:51:55,350 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 15:51:55,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329639584] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:51:55,350 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 15:51:55,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2024-12-02 15:51:55,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321674091] [2024-12-02 15:51:55,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 15:51:55,351 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-12-02 15:51:55,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:51:55,351 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-12-02 15:51:55,352 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=326, Unknown=0, NotChecked=0, Total=650 [2024-12-02 15:51:55,352 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 77 [2024-12-02 15:51:55,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 73 transitions, 254 flow. Second operand has 26 states, 26 states have (on average 16.192307692307693) internal successors, (421), 26 states have internal predecessors, (421), 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) [2024-12-02 15:51:55,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 15:51:55,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 77 [2024-12-02 15:51:55,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 15:51:55,947 INFO L124 PetriNetUnfolderBase]: 2345/4534 cut-off events. [2024-12-02 15:51:55,947 INFO L125 PetriNetUnfolderBase]: For 598/598 co-relation queries the response was YES. [2024-12-02 15:51:55,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8472 conditions, 4534 events. 2345/4534 cut-off events. For 598/598 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 27556 event pairs, 2178 based on Foata normal form. 12/3839 useless extension candidates. Maximal degree in co-relation 8335. Up to 3752 conditions per place. [2024-12-02 15:51:55,967 INFO L140 encePairwiseOnDemand]: 74/77 looper letters, 47 selfloop transitions, 23 changer transitions 0/85 dead transitions. [2024-12-02 15:51:55,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 85 transitions, 490 flow [2024-12-02 15:51:55,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-12-02 15:51:55,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-12-02 15:51:55,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 442 transitions. [2024-12-02 15:51:55,969 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.23917748917748918 [2024-12-02 15:51:55,969 INFO L175 Difference]: Start difference. First operand has 89 places, 73 transitions, 254 flow. Second operand 24 states and 442 transitions. [2024-12-02 15:51:55,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 85 transitions, 490 flow [2024-12-02 15:51:55,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 85 transitions, 418 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-12-02 15:51:55,975 INFO L231 Difference]: Finished difference. Result has 119 places, 85 transitions, 374 flow [2024-12-02 15:51:55,975 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=374, PETRI_PLACES=119, PETRI_TRANSITIONS=85} [2024-12-02 15:51:55,976 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 56 predicate places. [2024-12-02 15:51:55,976 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 85 transitions, 374 flow [2024-12-02 15:51:55,976 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 16.192307692307693) internal successors, (421), 26 states have internal predecessors, (421), 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) [2024-12-02 15:51:55,977 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 15:51:55,977 INFO L206 CegarLoopForPetriNet]: trace histogram [22, 2, 1, 1, 1, 1, 1] [2024-12-02 15:51:55,996 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43af5a6-0e44-4212-9c15-2daa71bf427c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-12-02 15:51:56,177 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43af5a6-0e44-4212-9c15-2daa71bf427c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-12-02 15:51:56,177 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 15:51:56,178 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:51:56,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1695989737, now seen corresponding path program 4 times [2024-12-02 15:51:56,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:51:56,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619038450] [2024-12-02 15:51:56,178 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 15:51:56,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:51:56,349 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 15:51:56,349 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:51:57,806 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 15:51:57,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:51:57,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619038450] [2024-12-02 15:51:57,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619038450] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:51:57,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719042353] [2024-12-02 15:51:57,806 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 15:51:57,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:51:57,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43af5a6-0e44-4212-9c15-2daa71bf427c/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:51:57,808 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43af5a6-0e44-4212-9c15-2daa71bf427c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:51:57,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43af5a6-0e44-4212-9c15-2daa71bf427c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-12-02 15:51:58,539 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 15:51:58,539 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:51:58,554 INFO L256 TraceCheckSpWp]: Trace formula consists of 4835 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-12-02 15:51:58,557 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:51:58,606 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 15:51:58,606 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:51:59,220 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 15:51:59,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719042353] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:51:59,221 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 15:51:59,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2024-12-02 15:51:59,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120118613] [2024-12-02 15:51:59,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 15:51:59,221 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-12-02 15:51:59,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:51:59,223 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-12-02 15:51:59,223 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2024-12-02 15:51:59,224 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 77 [2024-12-02 15:51:59,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 85 transitions, 374 flow. Second operand has 49 states, 49 states have (on average 16.081632653061224) internal successors, (788), 49 states have internal predecessors, (788), 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) [2024-12-02 15:51:59,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 15:51:59,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 77 [2024-12-02 15:51:59,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 15:52:00,097 INFO L124 PetriNetUnfolderBase]: 2345/4558 cut-off events. [2024-12-02 15:52:00,097 INFO L125 PetriNetUnfolderBase]: For 5368/5368 co-relation queries the response was YES. [2024-12-02 15:52:00,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8616 conditions, 4558 events. 2345/4558 cut-off events. For 5368/5368 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 27556 event pairs, 2178 based on Foata normal form. 24/3875 useless extension candidates. Maximal degree in co-relation 8347. Up to 3752 conditions per place. [2024-12-02 15:52:00,116 INFO L140 encePairwiseOnDemand]: 74/77 looper letters, 47 selfloop transitions, 47 changer transitions 0/109 dead transitions. [2024-12-02 15:52:00,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 109 transitions, 754 flow [2024-12-02 15:52:00,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-12-02 15:52:00,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2024-12-02 15:52:00,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 838 transitions. [2024-12-02 15:52:00,121 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.22673160173160173 [2024-12-02 15:52:00,121 INFO L175 Difference]: Start difference. First operand has 119 places, 85 transitions, 374 flow. Second operand 48 states and 838 transitions. [2024-12-02 15:52:00,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 109 transitions, 754 flow [2024-12-02 15:52:00,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 109 transitions, 610 flow, removed 61 selfloop flow, removed 11 redundant places. [2024-12-02 15:52:00,130 INFO L231 Difference]: Finished difference. Result has 179 places, 109 transitions, 614 flow [2024-12-02 15:52:00,131 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=614, PETRI_PLACES=179, PETRI_TRANSITIONS=109} [2024-12-02 15:52:00,131 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 116 predicate places. [2024-12-02 15:52:00,131 INFO L471 AbstractCegarLoop]: Abstraction has has 179 places, 109 transitions, 614 flow [2024-12-02 15:52:00,132 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 16.081632653061224) internal successors, (788), 49 states have internal predecessors, (788), 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) [2024-12-02 15:52:00,132 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 15:52:00,132 INFO L206 CegarLoopForPetriNet]: trace histogram [46, 2, 1, 1, 1, 1, 1] [2024-12-02 15:52:00,150 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43af5a6-0e44-4212-9c15-2daa71bf427c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-12-02 15:52:00,332 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43af5a6-0e44-4212-9c15-2daa71bf427c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:52:00,333 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 15:52:00,333 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:52:00,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1936228887, now seen corresponding path program 5 times [2024-12-02 15:52:00,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:52:00,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092148751] [2024-12-02 15:52:00,333 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 15:52:00,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:52:00,825 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2024-12-02 15:52:00,825 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:52:03,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 15:52:03,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:52:03,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092148751] [2024-12-02 15:52:03,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092148751] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:52:03,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877567375] [2024-12-02 15:52:03,849 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 15:52:03,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:52:03,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43af5a6-0e44-4212-9c15-2daa71bf427c/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:52:03,850 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43af5a6-0e44-4212-9c15-2daa71bf427c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:52:03,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43af5a6-0e44-4212-9c15-2daa71bf427c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process