./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_22-deref_read_racefree.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_8ff0f4df-3ab8-414b-87a1-1a2dc06a739f/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ff0f4df-3ab8-414b-87a1-1a2dc06a739f/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ff0f4df-3ab8-414b-87a1-1a2dc06a739f/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ff0f4df-3ab8-414b-87a1-1a2dc06a739f/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_22-deref_read_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ff0f4df-3ab8-414b-87a1-1a2dc06a739f/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ff0f4df-3ab8-414b-87a1-1a2dc06a739f/bin/uautomizer-verify-aQ6SnzHsRB --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 4ce97f399f5ab540e05119d9433f4e1bfecfe892f8e87faddc6435387a55a4d6 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-27 23:16:22,178 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-27 23:16:22,299 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ff0f4df-3ab8-414b-87a1-1a2dc06a739f/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-27 23:16:22,310 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-27 23:16:22,313 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-27 23:16:22,359 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-27 23:16:22,360 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-27 23:16:22,360 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-27 23:16:22,361 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-27 23:16:22,361 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-27 23:16:22,362 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-27 23:16:22,363 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-27 23:16:22,363 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-27 23:16:22,363 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-27 23:16:22,363 INFO L153 SettingsManager]: * Use SBE=true [2024-11-27 23:16:22,364 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-27 23:16:22,364 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-27 23:16:22,364 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-27 23:16:22,365 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-27 23:16:22,365 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-27 23:16:22,365 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-27 23:16:22,365 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-27 23:16:22,365 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-27 23:16:22,365 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-27 23:16:22,366 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-27 23:16:22,366 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-27 23:16:22,366 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-27 23:16:22,366 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-27 23:16:22,366 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-27 23:16:22,366 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 23:16:22,367 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 23:16:22,367 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 23:16:22,367 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 23:16:22,367 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-27 23:16:22,368 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 23:16:22,368 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 23:16:22,368 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 23:16:22,369 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 23:16:22,369 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-27 23:16:22,369 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-27 23:16:22,369 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-27 23:16:22,369 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-27 23:16:22,369 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-27 23:16:22,370 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-27 23:16:22,370 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-27 23:16:22,370 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-27 23:16:22,370 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-27 23:16:22,370 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-27 23:16:22,370 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_8ff0f4df-3ab8-414b-87a1-1a2dc06a739f/bin/uautomizer-verify-aQ6SnzHsRB 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 -> 4ce97f399f5ab540e05119d9433f4e1bfecfe892f8e87faddc6435387a55a4d6 [2024-11-27 23:16:22,756 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-27 23:16:22,767 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-27 23:16:22,771 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-27 23:16:22,772 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-27 23:16:22,772 INFO L274 PluginConnector]: CDTParser initialized [2024-11-27 23:16:22,775 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ff0f4df-3ab8-414b-87a1-1a2dc06a739f/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/goblint-regression/28-race_reach_22-deref_read_racefree.i [2024-11-27 23:16:26,442 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ff0f4df-3ab8-414b-87a1-1a2dc06a739f/bin/uautomizer-verify-aQ6SnzHsRB/data/3c61fadd6/4a8c19e30af94c9899d408d7122b4821/FLAG5aaba9028 [2024-11-27 23:16:26,849 INFO L384 CDTParser]: Found 1 translation units. [2024-11-27 23:16:26,850 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ff0f4df-3ab8-414b-87a1-1a2dc06a739f/sv-benchmarks/c/goblint-regression/28-race_reach_22-deref_read_racefree.i [2024-11-27 23:16:26,880 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ff0f4df-3ab8-414b-87a1-1a2dc06a739f/bin/uautomizer-verify-aQ6SnzHsRB/data/3c61fadd6/4a8c19e30af94c9899d408d7122b4821/FLAG5aaba9028 [2024-11-27 23:16:26,907 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ff0f4df-3ab8-414b-87a1-1a2dc06a739f/bin/uautomizer-verify-aQ6SnzHsRB/data/3c61fadd6/4a8c19e30af94c9899d408d7122b4821 [2024-11-27 23:16:26,911 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-27 23:16:26,913 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-27 23:16:26,915 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-27 23:16:26,916 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-27 23:16:26,921 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-27 23:16:26,922 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 11:16:26" (1/1) ... [2024-11-27 23:16:26,923 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f971da0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:16:26, skipping insertion in model container [2024-11-27 23:16:26,924 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 11:16:26" (1/1) ... [2024-11-27 23:16:26,977 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-27 23:16:27,356 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_8ff0f4df-3ab8-414b-87a1-1a2dc06a739f/sv-benchmarks/c/goblint-regression/28-race_reach_22-deref_read_racefree.i[30176,30189] [2024-11-27 23:16:27,382 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 23:16:27,403 INFO L200 MainTranslator]: Completed pre-run [2024-11-27 23:16:27,453 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_8ff0f4df-3ab8-414b-87a1-1a2dc06a739f/sv-benchmarks/c/goblint-regression/28-race_reach_22-deref_read_racefree.i[30176,30189] [2024-11-27 23:16:27,461 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 23:16:27,506 INFO L204 MainTranslator]: Completed translation [2024-11-27 23:16:27,507 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:16:27 WrapperNode [2024-11-27 23:16:27,508 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-27 23:16:27,509 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-27 23:16:27,509 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-27 23:16:27,509 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-27 23:16:27,521 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:16:27" (1/1) ... [2024-11-27 23:16:27,543 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:16:27" (1/1) ... [2024-11-27 23:16:27,577 INFO L138 Inliner]: procedures = 170, calls = 37, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 66 [2024-11-27 23:16:27,579 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-27 23:16:27,579 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-27 23:16:27,580 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-27 23:16:27,580 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-27 23:16:27,592 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:16:27" (1/1) ... [2024-11-27 23:16:27,593 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:16:27" (1/1) ... [2024-11-27 23:16:27,595 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:16:27" (1/1) ... [2024-11-27 23:16:27,622 INFO L175 MemorySlicer]: Split 18 memory accesses to 4 slices as follows [2, 5, 6, 5]. 33 percent of accesses are in the largest equivalence class. The 13 initializations are split as follows [2, 5, 1, 5]. The 2 writes are split as follows [0, 0, 2, 0]. [2024-11-27 23:16:27,623 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:16:27" (1/1) ... [2024-11-27 23:16:27,623 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:16:27" (1/1) ... [2024-11-27 23:16:27,635 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:16:27" (1/1) ... [2024-11-27 23:16:27,640 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:16:27" (1/1) ... [2024-11-27 23:16:27,648 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:16:27" (1/1) ... [2024-11-27 23:16:27,650 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:16:27" (1/1) ... [2024-11-27 23:16:27,655 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:16:27" (1/1) ... [2024-11-27 23:16:27,658 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-27 23:16:27,662 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-27 23:16:27,662 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-27 23:16:27,662 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-27 23:16:27,664 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:16:27" (1/1) ... [2024-11-27 23:16:27,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 23:16:27,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ff0f4df-3ab8-414b-87a1-1a2dc06a739f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:16:27,705 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ff0f4df-3ab8-414b-87a1-1a2dc06a739f/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-27 23:16:27,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ff0f4df-3ab8-414b-87a1-1a2dc06a739f/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-27 23:16:27,745 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-27 23:16:27,745 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-27 23:16:27,745 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-27 23:16:27,746 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-27 23:16:27,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-27 23:16:27,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-27 23:16:27,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-27 23:16:27,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-27 23:16:27,750 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-27 23:16:27,750 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-27 23:16:27,750 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-11-27 23:16:27,750 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-11-27 23:16:27,750 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-27 23:16:27,750 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-27 23:16:27,750 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-27 23:16:27,750 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-27 23:16:27,750 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-27 23:16:27,751 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-27 23:16:27,751 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-27 23:16:27,752 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-27 23:16:27,965 INFO L234 CfgBuilder]: Building ICFG [2024-11-27 23:16:27,968 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-27 23:16:28,321 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-27 23:16:28,321 INFO L283 CfgBuilder]: Performing block encoding [2024-11-27 23:16:28,606 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-27 23:16:28,606 INFO L312 CfgBuilder]: Removed 5 assume(true) statements. [2024-11-27 23:16:28,607 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:16:28 BoogieIcfgContainer [2024-11-27 23:16:28,607 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-27 23:16:28,610 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-27 23:16:28,610 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-27 23:16:28,616 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-27 23:16:28,616 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 11:16:26" (1/3) ... [2024-11-27 23:16:28,616 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28aa64e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 11:16:28, skipping insertion in model container [2024-11-27 23:16:28,616 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:16:27" (2/3) ... [2024-11-27 23:16:28,617 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28aa64e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 11:16:28, skipping insertion in model container [2024-11-27 23:16:28,617 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:16:28" (3/3) ... [2024-11-27 23:16:28,618 INFO L128 eAbstractionObserver]: Analyzing ICFG 28-race_reach_22-deref_read_racefree.i [2024-11-27 23:16:28,636 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-27 23:16:28,637 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG 28-race_reach_22-deref_read_racefree.i that has 2 procedures, 36 locations, 1 initial locations, 5 loop locations, and 1 error locations. [2024-11-27 23:16:28,638 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-27 23:16:28,706 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-27 23:16:28,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 45 transitions, 94 flow [2024-11-27 23:16:28,817 INFO L124 PetriNetUnfolderBase]: 12/63 cut-off events. [2024-11-27 23:16:28,820 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-27 23:16:28,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67 conditions, 63 events. 12/63 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 189 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 42. Up to 4 conditions per place. [2024-11-27 23:16:28,825 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 45 transitions, 94 flow [2024-11-27 23:16:28,833 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 39 places, 45 transitions, 94 flow [2024-11-27 23:16:28,843 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-27 23:16:28,861 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;@6576bf55, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-27 23:16:28,861 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-27 23:16:28,880 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-27 23:16:28,881 INFO L124 PetriNetUnfolderBase]: 0/13 cut-off events. [2024-11-27 23:16:28,881 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-27 23:16:28,881 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:16:28,882 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-27 23:16:28,883 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-27 23:16:28,893 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:16:28,893 INFO L85 PathProgramCache]: Analyzing trace with hash 720647794, now seen corresponding path program 1 times [2024-11-27 23:16:28,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:16:28,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449696525] [2024-11-27 23:16:28,901 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:16:28,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:16:29,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-27 23:16:29,029 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-27 23:16:29,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-27 23:16:29,106 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-27 23:16:29,109 INFO L340 BasicCegarLoop]: Counterexample is feasible [2024-11-27 23:16:29,111 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2024-11-27 23:16:29,113 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2024-11-27 23:16:29,115 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-27 23:16:29,115 INFO L422 BasicCegarLoop]: Path program histogram: [1] [2024-11-27 23:16:29,121 WARN L246 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-27 23:16:29,122 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-27 23:16:29,165 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-27 23:16:29,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 59 places, 69 transitions, 148 flow [2024-11-27 23:16:29,218 INFO L124 PetriNetUnfolderBase]: 21/106 cut-off events. [2024-11-27 23:16:29,218 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-27 23:16:29,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 106 events. 21/106 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 396 event pairs, 0 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 66. Up to 6 conditions per place. [2024-11-27 23:16:29,220 INFO L82 GeneralOperation]: Start removeDead. Operand has 59 places, 69 transitions, 148 flow [2024-11-27 23:16:29,224 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 59 places, 69 transitions, 148 flow [2024-11-27 23:16:29,226 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-27 23:16:29,227 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;@6576bf55, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-27 23:16:29,227 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-27 23:16:29,248 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-27 23:16:29,248 INFO L124 PetriNetUnfolderBase]: 1/35 cut-off events. [2024-11-27 23:16:29,248 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-27 23:16:29,249 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:16:29,249 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:16:29,250 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-27 23:16:29,250 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:16:29,250 INFO L85 PathProgramCache]: Analyzing trace with hash -712621067, now seen corresponding path program 1 times [2024-11-27 23:16:29,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:16:29,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726135730] [2024-11-27 23:16:29,251 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:16:29,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:16:29,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:16:29,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:16:29,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:16:29,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726135730] [2024-11-27 23:16:29,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726135730] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:16:29,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:16:29,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 23:16:29,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379159822] [2024-11-27 23:16:29,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:16:29,466 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 23:16:29,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:16:29,492 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 23:16:29,493 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 23:16:29,494 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 69 [2024-11-27 23:16:29,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 69 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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) [2024-11-27 23:16:29,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:16:29,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 69 [2024-11-27 23:16:29,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:16:30,585 INFO L124 PetriNetUnfolderBase]: 1980/4012 cut-off events. [2024-11-27 23:16:30,586 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-11-27 23:16:30,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7240 conditions, 4012 events. 1980/4012 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 28357 event pairs, 1852 based on Foata normal form. 1095/4885 useless extension candidates. Maximal degree in co-relation 5310. Up to 3181 conditions per place. [2024-11-27 23:16:30,629 INFO L140 encePairwiseOnDemand]: 51/69 looper letters, 36 selfloop transitions, 2 changer transitions 6/65 dead transitions. [2024-11-27 23:16:30,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 65 transitions, 224 flow [2024-11-27 23:16:30,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 23:16:30,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-27 23:16:30,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 133 transitions. [2024-11-27 23:16:30,650 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.642512077294686 [2024-11-27 23:16:30,654 INFO L175 Difference]: Start difference. First operand has 59 places, 69 transitions, 148 flow. Second operand 3 states and 133 transitions. [2024-11-27 23:16:30,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 65 transitions, 224 flow [2024-11-27 23:16:30,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 65 transitions, 224 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-27 23:16:30,669 INFO L231 Difference]: Finished difference. Result has 62 places, 49 transitions, 118 flow [2024-11-27 23:16:30,673 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=62, PETRI_TRANSITIONS=49} [2024-11-27 23:16:30,677 INFO L279 CegarLoopForPetriNet]: 59 programPoint places, 3 predicate places. [2024-11-27 23:16:30,677 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 49 transitions, 118 flow [2024-11-27 23:16:30,678 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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) [2024-11-27 23:16:30,678 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:16:30,678 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2024-11-27 23:16:30,678 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-27 23:16:30,678 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-27 23:16:30,679 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:16:30,680 INFO L85 PathProgramCache]: Analyzing trace with hash 199673379, now seen corresponding path program 1 times [2024-11-27 23:16:30,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:16:30,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496925139] [2024-11-27 23:16:30,680 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:16:30,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:16:30,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-27 23:16:30,712 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-27 23:16:30,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-27 23:16:30,739 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-27 23:16:30,739 INFO L340 BasicCegarLoop]: Counterexample is feasible [2024-11-27 23:16:30,739 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2024-11-27 23:16:30,739 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2024-11-27 23:16:30,740 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-27 23:16:30,740 INFO L422 BasicCegarLoop]: Path program histogram: [1, 1] [2024-11-27 23:16:30,741 WARN L246 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-27 23:16:30,741 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-11-27 23:16:30,787 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-27 23:16:30,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 79 places, 93 transitions, 204 flow [2024-11-27 23:16:30,816 INFO L124 PetriNetUnfolderBase]: 30/149 cut-off events. [2024-11-27 23:16:30,817 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-27 23:16:30,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 149 events. 30/149 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 610 event pairs, 0 based on Foata normal form. 0/111 useless extension candidates. Maximal degree in co-relation 113. Up to 8 conditions per place. [2024-11-27 23:16:30,819 INFO L82 GeneralOperation]: Start removeDead. Operand has 79 places, 93 transitions, 204 flow [2024-11-27 23:16:30,821 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 79 places, 93 transitions, 204 flow [2024-11-27 23:16:30,823 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-27 23:16:30,826 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;@6576bf55, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-27 23:16:30,826 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-27 23:16:30,834 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-27 23:16:30,835 INFO L124 PetriNetUnfolderBase]: 1/35 cut-off events. [2024-11-27 23:16:30,835 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-27 23:16:30,835 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:16:30,835 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:16:30,836 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-27 23:16:30,836 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:16:30,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1844707957, now seen corresponding path program 1 times [2024-11-27 23:16:30,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:16:30,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886952175] [2024-11-27 23:16:30,838 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:16:30,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:16:30,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:16:30,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:16:30,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:16:30,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886952175] [2024-11-27 23:16:30,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886952175] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:16:30,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:16:30,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 23:16:30,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5522392] [2024-11-27 23:16:30,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:16:30,955 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 23:16:30,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:16:30,955 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 23:16:30,956 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 23:16:30,956 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 93 [2024-11-27 23:16:30,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 93 transitions, 204 flow. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 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) [2024-11-27 23:16:30,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:16:30,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 93 [2024-11-27 23:16:30,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:16:38,018 INFO L124 PetriNetUnfolderBase]: 30780/51390 cut-off events. [2024-11-27 23:16:38,018 INFO L125 PetriNetUnfolderBase]: For 790/790 co-relation queries the response was YES. [2024-11-27 23:16:38,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94819 conditions, 51390 events. 30780/51390 cut-off events. For 790/790 co-relation queries the response was YES. Maximal size of possible extension queue 1440. Compared 448179 event pairs, 19800 based on Foata normal form. 16042/65314 useless extension candidates. Maximal degree in co-relation 7282. Up to 42981 conditions per place. [2024-11-27 23:16:38,463 INFO L140 encePairwiseOnDemand]: 69/93 looper letters, 46 selfloop transitions, 2 changer transitions 6/83 dead transitions. [2024-11-27 23:16:38,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 83 transitions, 288 flow [2024-11-27 23:16:38,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 23:16:38,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-27 23:16:38,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 173 transitions. [2024-11-27 23:16:38,466 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6200716845878136 [2024-11-27 23:16:38,466 INFO L175 Difference]: Start difference. First operand has 79 places, 93 transitions, 204 flow. Second operand 3 states and 173 transitions. [2024-11-27 23:16:38,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 83 transitions, 288 flow [2024-11-27 23:16:38,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 83 transitions, 286 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-11-27 23:16:38,473 INFO L231 Difference]: Finished difference. Result has 82 places, 67 transitions, 160 flow [2024-11-27 23:16:38,474 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=79, 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=160, PETRI_PLACES=82, PETRI_TRANSITIONS=67} [2024-11-27 23:16:38,476 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 3 predicate places. [2024-11-27 23:16:38,476 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 67 transitions, 160 flow [2024-11-27 23:16:38,477 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 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) [2024-11-27 23:16:38,477 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:16:38,477 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:16:38,478 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-27 23:16:38,479 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-27 23:16:38,479 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:16:38,480 INFO L85 PathProgramCache]: Analyzing trace with hash -51908709, now seen corresponding path program 1 times [2024-11-27 23:16:38,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:16:38,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63715807] [2024-11-27 23:16:38,481 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:16:38,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:16:38,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:16:38,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:16:38,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:16:38,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63715807] [2024-11-27 23:16:38,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63715807] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:16:38,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:16:38,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 23:16:38,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553100976] [2024-11-27 23:16:38,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:16:38,640 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 23:16:38,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:16:38,640 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 23:16:38,640 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-27 23:16:38,641 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 93 [2024-11-27 23:16:38,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 67 transitions, 160 flow. Second operand has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 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) [2024-11-27 23:16:38,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:16:38,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 93 [2024-11-27 23:16:38,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:16:41,890 INFO L124 PetriNetUnfolderBase]: 19188/32438 cut-off events. [2024-11-27 23:16:41,891 INFO L125 PetriNetUnfolderBase]: For 2629/2629 co-relation queries the response was YES. [2024-11-27 23:16:41,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61918 conditions, 32438 events. 19188/32438 cut-off events. For 2629/2629 co-relation queries the response was YES. Maximal size of possible extension queue 1001. Compared 269851 event pairs, 12150 based on Foata normal form. 10/31804 useless extension candidates. Maximal degree in co-relation 6341. Up to 26681 conditions per place. [2024-11-27 23:16:42,042 INFO L140 encePairwiseOnDemand]: 90/93 looper letters, 65 selfloop transitions, 3 changer transitions 0/97 dead transitions. [2024-11-27 23:16:42,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 97 transitions, 358 flow [2024-11-27 23:16:42,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 23:16:42,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-27 23:16:42,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 193 transitions. [2024-11-27 23:16:42,045 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5188172043010753 [2024-11-27 23:16:42,045 INFO L175 Difference]: Start difference. First operand has 82 places, 67 transitions, 160 flow. Second operand 4 states and 193 transitions. [2024-11-27 23:16:42,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 97 transitions, 358 flow [2024-11-27 23:16:42,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 97 transitions, 356 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-27 23:16:42,049 INFO L231 Difference]: Finished difference. Result has 79 places, 68 transitions, 174 flow [2024-11-27 23:16:42,050 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=174, PETRI_PLACES=79, PETRI_TRANSITIONS=68} [2024-11-27 23:16:42,050 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 0 predicate places. [2024-11-27 23:16:42,051 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 68 transitions, 174 flow [2024-11-27 23:16:42,051 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 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) [2024-11-27 23:16:42,051 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:16:42,051 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2024-11-27 23:16:42,051 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-27 23:16:42,052 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-27 23:16:42,052 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:16:42,052 INFO L85 PathProgramCache]: Analyzing trace with hash -967113039, now seen corresponding path program 1 times [2024-11-27 23:16:42,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:16:42,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710053337] [2024-11-27 23:16:42,053 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:16:42,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:16:42,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-27 23:16:42,082 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-27 23:16:42,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-27 23:16:42,118 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-27 23:16:42,122 INFO L340 BasicCegarLoop]: Counterexample is feasible [2024-11-27 23:16:42,122 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2024-11-27 23:16:42,123 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2024-11-27 23:16:42,123 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-27 23:16:42,123 INFO L422 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2024-11-27 23:16:42,124 WARN L246 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-27 23:16:42,124 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-11-27 23:16:42,176 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-27 23:16:42,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 117 transitions, 262 flow [2024-11-27 23:16:42,202 INFO L124 PetriNetUnfolderBase]: 39/192 cut-off events. [2024-11-27 23:16:42,203 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-11-27 23:16:42,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211 conditions, 192 events. 39/192 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 836 event pairs, 0 based on Foata normal form. 0/143 useless extension candidates. Maximal degree in co-relation 161. Up to 10 conditions per place. [2024-11-27 23:16:42,208 INFO L82 GeneralOperation]: Start removeDead. Operand has 99 places, 117 transitions, 262 flow [2024-11-27 23:16:42,211 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 117 transitions, 262 flow [2024-11-27 23:16:42,213 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-27 23:16:42,215 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;@6576bf55, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-27 23:16:42,215 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-27 23:16:42,219 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-27 23:16:42,219 INFO L124 PetriNetUnfolderBase]: 1/35 cut-off events. [2024-11-27 23:16:42,219 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-27 23:16:42,219 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:16:42,219 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:16:42,220 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-27 23:16:42,220 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:16:42,220 INFO L85 PathProgramCache]: Analyzing trace with hash -479900427, now seen corresponding path program 1 times [2024-11-27 23:16:42,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:16:42,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958636078] [2024-11-27 23:16:42,221 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:16:42,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:16:42,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:16:42,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:16:42,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:16:42,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958636078] [2024-11-27 23:16:42,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958636078] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:16:42,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:16:42,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 23:16:42,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586204259] [2024-11-27 23:16:42,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:16:42,264 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 23:16:42,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:16:42,265 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 23:16:42,265 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 23:16:42,266 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 117 [2024-11-27 23:16:42,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 117 transitions, 262 flow. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 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) [2024-11-27 23:16:42,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:16:42,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 117 [2024-11-27 23:16:42,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand