./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-atomic/read_write_lock-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_377060aa-a503-4da8-8627-4b1dbc6a764e/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_377060aa-a503-4da8-8627-4b1dbc6a764e/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_377060aa-a503-4da8-8627-4b1dbc6a764e/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_377060aa-a503-4da8-8627-4b1dbc6a764e/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-atomic/read_write_lock-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_377060aa-a503-4da8-8627-4b1dbc6a764e/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_377060aa-a503-4da8-8627-4b1dbc6a764e/bin/uautomizer-verify-aQ6SnzHsRB --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3e2f466b16db44ce2fec1aabf9e70b4ab734ef2801c32e66d10c5bcbcceb5301 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 04:11:30,296 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 04:11:30,394 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_377060aa-a503-4da8-8627-4b1dbc6a764e/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-28 04:11:30,405 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 04:11:30,405 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 04:11:30,438 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 04:11:30,438 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 04:11:30,439 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 04:11:30,439 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 04:11:30,439 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 04:11:30,439 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 04:11:30,439 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 04:11:30,440 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 04:11:30,440 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 04:11:30,440 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 04:11:30,440 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 04:11:30,440 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 04:11:30,441 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 04:11:30,441 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 04:11:30,441 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 04:11:30,441 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-28 04:11:30,441 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-28 04:11:30,441 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-28 04:11:30,441 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 04:11:30,442 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-28 04:11:30,442 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-28 04:11:30,442 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 04:11:30,442 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 04:11:30,442 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 04:11:30,442 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 04:11:30,443 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:11:30,443 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:11:30,443 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:11:30,443 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:11:30,443 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 04:11:30,443 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:11:30,443 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:11:30,444 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:11:30,444 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:11:30,444 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 04:11:30,444 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 04:11:30,444 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 04:11:30,444 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 04:11:30,444 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 04:11:30,445 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 04:11:30,445 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 04:11:30,445 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 04:11:30,445 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_377060aa-a503-4da8-8627-4b1dbc6a764e/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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> 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 -> 3e2f466b16db44ce2fec1aabf9e70b4ab734ef2801c32e66d10c5bcbcceb5301 [2024-11-28 04:11:30,763 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 04:11:30,772 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 04:11:30,775 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 04:11:30,776 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 04:11:30,778 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 04:11:30,779 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_377060aa-a503-4da8-8627-4b1dbc6a764e/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/pthread-atomic/read_write_lock-2.i [2024-11-28 04:11:33,637 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_377060aa-a503-4da8-8627-4b1dbc6a764e/bin/uautomizer-verify-aQ6SnzHsRB/data/f28e340c2/2a9404174cb7485e822f3da183501500/FLAG1257022b1 [2024-11-28 04:11:34,016 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 04:11:34,017 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_377060aa-a503-4da8-8627-4b1dbc6a764e/sv-benchmarks/c/pthread-atomic/read_write_lock-2.i [2024-11-28 04:11:34,032 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_377060aa-a503-4da8-8627-4b1dbc6a764e/bin/uautomizer-verify-aQ6SnzHsRB/data/f28e340c2/2a9404174cb7485e822f3da183501500/FLAG1257022b1 [2024-11-28 04:11:34,047 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_377060aa-a503-4da8-8627-4b1dbc6a764e/bin/uautomizer-verify-aQ6SnzHsRB/data/f28e340c2/2a9404174cb7485e822f3da183501500 [2024-11-28 04:11:34,051 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 04:11:34,052 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 04:11:34,055 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 04:11:34,056 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 04:11:34,060 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 04:11:34,061 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:11:34" (1/1) ... [2024-11-28 04:11:34,063 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34a3daa9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:11:34, skipping insertion in model container [2024-11-28 04:11:34,063 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:11:34" (1/1) ... [2024-11-28 04:11:34,107 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 04:11:34,439 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:11:34,453 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 04:11:34,509 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:11:34,556 INFO L204 MainTranslator]: Completed translation [2024-11-28 04:11:34,557 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:11:34 WrapperNode [2024-11-28 04:11:34,558 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 04:11:34,559 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 04:11:34,559 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 04:11:34,559 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 04:11:34,567 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:11:34" (1/1) ... [2024-11-28 04:11:34,584 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:11:34" (1/1) ... [2024-11-28 04:11:34,612 INFO L138 Inliner]: procedures = 172, calls = 31, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 96 [2024-11-28 04:11:34,613 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 04:11:34,613 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 04:11:34,614 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 04:11:34,614 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 04:11:34,622 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:11:34" (1/1) ... [2024-11-28 04:11:34,624 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:11:34" (1/1) ... [2024-11-28 04:11:34,632 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:11:34" (1/1) ... [2024-11-28 04:11:34,651 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-28 04:11:34,656 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:11:34" (1/1) ... [2024-11-28 04:11:34,656 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:11:34" (1/1) ... [2024-11-28 04:11:34,661 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:11:34" (1/1) ... [2024-11-28 04:11:34,665 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:11:34" (1/1) ... [2024-11-28 04:11:34,671 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:11:34" (1/1) ... [2024-11-28 04:11:34,676 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:11:34" (1/1) ... [2024-11-28 04:11:34,677 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:11:34" (1/1) ... [2024-11-28 04:11:34,679 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 04:11:34,684 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 04:11:34,684 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 04:11:34,684 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 04:11:34,685 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:11:34" (1/1) ... [2024-11-28 04:11:34,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:11:34,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_377060aa-a503-4da8-8627-4b1dbc6a764e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:11:34,722 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_377060aa-a503-4da8-8627-4b1dbc6a764e/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 04:11:34,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_377060aa-a503-4da8-8627-4b1dbc6a764e/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 04:11:34,755 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-28 04:11:34,756 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 04:11:34,756 INFO L130 BoogieDeclarations]: Found specification of procedure reader [2024-11-28 04:11:34,756 INFO L138 BoogieDeclarations]: Found implementation of procedure reader [2024-11-28 04:11:34,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 04:11:34,756 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-28 04:11:34,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 04:11:34,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 04:11:34,756 INFO L130 BoogieDeclarations]: Found specification of procedure writer [2024-11-28 04:11:34,756 INFO L138 BoogieDeclarations]: Found implementation of procedure writer [2024-11-28 04:11:34,758 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-28 04:11:34,906 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 04:11:34,908 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 04:11:35,129 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-28 04:11:35,129 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 04:11:35,288 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 04:11:35,289 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-28 04:11:35,289 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:11:35 BoogieIcfgContainer [2024-11-28 04:11:35,289 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 04:11:35,291 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 04:11:35,291 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 04:11:35,297 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 04:11:35,297 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 04:11:34" (1/3) ... [2024-11-28 04:11:35,298 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f61f999 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:11:35, skipping insertion in model container [2024-11-28 04:11:35,298 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:11:34" (2/3) ... [2024-11-28 04:11:35,298 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f61f999 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:11:35, skipping insertion in model container [2024-11-28 04:11:35,298 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:11:35" (3/3) ... [2024-11-28 04:11:35,299 INFO L128 eAbstractionObserver]: Analyzing ICFG read_write_lock-2.i [2024-11-28 04:11:35,315 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 04:11:35,317 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG read_write_lock-2.i that has 3 procedures, 38 locations, 1 initial locations, 0 loop locations, and 2 error locations. [2024-11-28 04:11:35,317 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-28 04:11:35,406 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-28 04:11:35,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 71 places, 62 transitions, 152 flow [2024-11-28 04:11:35,508 INFO L124 PetriNetUnfolderBase]: 4/58 cut-off events. [2024-11-28 04:11:35,512 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-28 04:11:35,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75 conditions, 58 events. 4/58 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 123 event pairs, 0 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 55. Up to 2 conditions per place. [2024-11-28 04:11:35,520 INFO L82 GeneralOperation]: Start removeDead. Operand has 71 places, 62 transitions, 152 flow [2024-11-28 04:11:35,524 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 57 transitions, 138 flow [2024-11-28 04:11:35,534 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 04:11:35,547 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=None, 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;@d60f7dc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 04:11:35,547 INFO L334 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-11-28 04:11:35,560 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-28 04:11:35,560 INFO L124 PetriNetUnfolderBase]: 2/38 cut-off events. [2024-11-28 04:11:35,560 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-28 04:11:35,561 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:11:35,561 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:11:35,562 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting readerErr0ASSERT_VIOLATIONMEMORY_LEAK === [readerErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-11-28 04:11:35,567 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:11:35,568 INFO L85 PathProgramCache]: Analyzing trace with hash 636066479, now seen corresponding path program 1 times [2024-11-28 04:11:35,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:11:35,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667383739] [2024-11-28 04:11:35,575 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:11:35,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:11:35,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:11:35,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:11:35,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:11:35,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667383739] [2024-11-28 04:11:35,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667383739] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:11:35,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:11:35,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 04:11:35,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083793201] [2024-11-28 04:11:35,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:11:35,918 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 04:11:35,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:11:35,949 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 04:11:35,949 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 04:11:36,067 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 62 [2024-11-28 04:11:36,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 57 transitions, 138 flow. Second operand has 6 states, 6 states have (on average 24.833333333333332) internal successors, (149), 6 states have internal predecessors, (149), 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) [2024-11-28 04:11:36,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:11:36,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 62 [2024-11-28 04:11:36,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:11:39,429 INFO L124 PetriNetUnfolderBase]: 14102/24421 cut-off events. [2024-11-28 04:11:39,429 INFO L125 PetriNetUnfolderBase]: For 2090/2090 co-relation queries the response was YES. [2024-11-28 04:11:39,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45384 conditions, 24421 events. 14102/24421 cut-off events. For 2090/2090 co-relation queries the response was YES. Maximal size of possible extension queue 1202. Compared 210247 event pairs, 1527 based on Foata normal form. 2538/26333 useless extension candidates. Maximal degree in co-relation 40085. Up to 6266 conditions per place. [2024-11-28 04:11:39,687 INFO L140 encePairwiseOnDemand]: 47/62 looper letters, 179 selfloop transitions, 37 changer transitions 0/233 dead transitions. [2024-11-28 04:11:39,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 233 transitions, 1015 flow [2024-11-28 04:11:39,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 04:11:39,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-28 04:11:39,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 544 transitions. [2024-11-28 04:11:39,707 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.674937965260546 [2024-11-28 04:11:39,709 INFO L175 Difference]: Start difference. First operand has 66 places, 57 transitions, 138 flow. Second operand 13 states and 544 transitions. [2024-11-28 04:11:39,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 233 transitions, 1015 flow [2024-11-28 04:11:39,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 233 transitions, 937 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-28 04:11:39,782 INFO L231 Difference]: Finished difference. Result has 76 places, 90 transitions, 353 flow [2024-11-28 04:11:39,785 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=353, PETRI_PLACES=76, PETRI_TRANSITIONS=90} [2024-11-28 04:11:39,791 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 10 predicate places. [2024-11-28 04:11:39,792 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 90 transitions, 353 flow [2024-11-28 04:11:39,792 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.833333333333332) internal successors, (149), 6 states have internal predecessors, (149), 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) [2024-11-28 04:11:39,792 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:11:39,793 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:11:39,793 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 04:11:39,793 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting readerErr0ASSERT_VIOLATIONMEMORY_LEAK === [readerErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-11-28 04:11:39,794 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:11:39,794 INFO L85 PathProgramCache]: Analyzing trace with hash 300194929, now seen corresponding path program 1 times [2024-11-28 04:11:39,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:11:39,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996674294] [2024-11-28 04:11:39,795 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:11:39,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:11:39,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:11:39,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:11:39,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:11:39,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996674294] [2024-11-28 04:11:39,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996674294] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:11:39,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:11:39,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 04:11:39,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084875700] [2024-11-28 04:11:39,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:11:39,972 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 04:11:39,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:11:39,973 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 04:11:39,973 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 04:11:39,978 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 62 [2024-11-28 04:11:39,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 90 transitions, 353 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) [2024-11-28 04:11:39,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:11:39,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 62 [2024-11-28 04:11:39,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:11:41,496 INFO L124 PetriNetUnfolderBase]: 6834/13886 cut-off events. [2024-11-28 04:11:41,496 INFO L125 PetriNetUnfolderBase]: For 4976/5295 co-relation queries the response was YES. [2024-11-28 04:11:41,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28294 conditions, 13886 events. 6834/13886 cut-off events. For 4976/5295 co-relation queries the response was YES. Maximal size of possible extension queue 904. Compared 134465 event pairs, 2739 based on Foata normal form. 717/13669 useless extension candidates. Maximal degree in co-relation 22139. Up to 5307 conditions per place. [2024-11-28 04:11:41,636 INFO L140 encePairwiseOnDemand]: 56/62 looper letters, 40 selfloop transitions, 4 changer transitions 0/107 dead transitions. [2024-11-28 04:11:41,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 107 transitions, 486 flow [2024-11-28 04:11:41,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 04:11:41,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 04:11:41,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 138 transitions. [2024-11-28 04:11:41,639 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7419354838709677 [2024-11-28 04:11:41,640 INFO L175 Difference]: Start difference. First operand has 76 places, 90 transitions, 353 flow. Second operand 3 states and 138 transitions. [2024-11-28 04:11:41,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 107 transitions, 486 flow [2024-11-28 04:11:41,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 107 transitions, 486 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-28 04:11:41,784 INFO L231 Difference]: Finished difference. Result has 79 places, 90 transitions, 369 flow [2024-11-28 04:11:41,784 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=369, PETRI_PLACES=79, PETRI_TRANSITIONS=90} [2024-11-28 04:11:41,785 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 13 predicate places. [2024-11-28 04:11:41,785 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 90 transitions, 369 flow [2024-11-28 04:11:41,785 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) [2024-11-28 04:11:41,785 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:11:41,785 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:11:41,785 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-28 04:11:41,785 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting readerErr0ASSERT_VIOLATIONMEMORY_LEAK === [readerErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-11-28 04:11:41,786 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:11:41,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1645647337, now seen corresponding path program 2 times [2024-11-28 04:11:41,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:11:41,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902949818] [2024-11-28 04:11:41,786 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:11:41,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:11:41,811 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 04:11:41,811 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:11:41,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:11:41,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:11:41,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902949818] [2024-11-28 04:11:41,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902949818] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:11:41,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:11:41,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 04:11:41,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788572826] [2024-11-28 04:11:41,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:11:41,909 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:11:41,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:11:41,910 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:11:41,910 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:11:41,922 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 62 [2024-11-28 04:11:41,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 90 transitions, 369 flow. Second operand has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 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) [2024-11-28 04:11:41,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:11:41,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 62 [2024-11-28 04:11:41,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:11:43,243 INFO L124 PetriNetUnfolderBase]: 6316/12591 cut-off events. [2024-11-28 04:11:43,243 INFO L125 PetriNetUnfolderBase]: For 6176/6368 co-relation queries the response was YES. [2024-11-28 04:11:43,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27257 conditions, 12591 events. 6316/12591 cut-off events. For 6176/6368 co-relation queries the response was YES. Maximal size of possible extension queue 808. Compared 113465 event pairs, 1680 based on Foata normal form. 318/12552 useless extension candidates. Maximal degree in co-relation 24216. Up to 3792 conditions per place. [2024-11-28 04:11:43,314 INFO L140 encePairwiseOnDemand]: 55/62 looper letters, 61 selfloop transitions, 9 changer transitions 0/133 dead transitions. [2024-11-28 04:11:43,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 133 transitions, 632 flow [2024-11-28 04:11:43,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:11:43,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 04:11:43,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 192 transitions. [2024-11-28 04:11:43,319 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7741935483870968 [2024-11-28 04:11:43,319 INFO L175 Difference]: Start difference. First operand has 79 places, 90 transitions, 369 flow. Second operand 4 states and 192 transitions. [2024-11-28 04:11:43,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 133 transitions, 632 flow [2024-11-28 04:11:43,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 133 transitions, 620 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 04:11:43,428 INFO L231 Difference]: Finished difference. Result has 83 places, 98 transitions, 435 flow [2024-11-28 04:11:43,429 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=361, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=435, PETRI_PLACES=83, PETRI_TRANSITIONS=98} [2024-11-28 04:11:43,430 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 17 predicate places. [2024-11-28 04:11:43,430 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 98 transitions, 435 flow [2024-11-28 04:11:43,431 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 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) [2024-11-28 04:11:43,431 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:11:43,431 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:11:43,431 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-28 04:11:43,431 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting readerErr0ASSERT_VIOLATIONMEMORY_LEAK === [readerErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-11-28 04:11:43,432 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:11:43,432 INFO L85 PathProgramCache]: Analyzing trace with hash -763757256, now seen corresponding path program 1 times [2024-11-28 04:11:43,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:11:43,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707946466] [2024-11-28 04:11:43,432 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:11:43,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:11:43,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:11:43,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:11:43,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:11:43,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707946466] [2024-11-28 04:11:43,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707946466] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:11:43,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:11:43,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 04:11:43,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239820451] [2024-11-28 04:11:43,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:11:43,536 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 04:11:43,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:11:43,537 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 04:11:43,537 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 04:11:43,582 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 62 [2024-11-28 04:11:43,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 98 transitions, 435 flow. Second operand has 6 states, 6 states have (on average 25.5) internal successors, (153), 6 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:11:43,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:11:43,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 62 [2024-11-28 04:11:43,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:11:45,751 INFO L124 PetriNetUnfolderBase]: 13472/22783 cut-off events. [2024-11-28 04:11:45,751 INFO L125 PetriNetUnfolderBase]: For 21011/21745 co-relation queries the response was YES. [2024-11-28 04:11:45,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56662 conditions, 22783 events. 13472/22783 cut-off events. For 21011/21745 co-relation queries the response was YES. Maximal size of possible extension queue 1201. Compared 182277 event pairs, 2029 based on Foata normal form. 460/22855 useless extension candidates. Maximal degree in co-relation 52344. Up to 5101 conditions per place. [2024-11-28 04:11:46,014 INFO L140 encePairwiseOnDemand]: 51/62 looper letters, 201 selfloop transitions, 70 changer transitions 0/301 dead transitions. [2024-11-28 04:11:46,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 301 transitions, 1810 flow [2024-11-28 04:11:46,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 04:11:46,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-28 04:11:46,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 504 transitions. [2024-11-28 04:11:46,018 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6253101736972705 [2024-11-28 04:11:46,018 INFO L175 Difference]: Start difference. First operand has 83 places, 98 transitions, 435 flow. Second operand 13 states and 504 transitions. [2024-11-28 04:11:46,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 301 transitions, 1810 flow [2024-11-28 04:11:46,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 301 transitions, 1810 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-28 04:11:46,321 INFO L231 Difference]: Finished difference. Result has 105 places, 157 transitions, 1038 flow [2024-11-28 04:11:46,322 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=435, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1038, PETRI_PLACES=105, PETRI_TRANSITIONS=157} [2024-11-28 04:11:46,322 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 39 predicate places. [2024-11-28 04:11:46,323 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 157 transitions, 1038 flow [2024-11-28 04:11:46,323 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.5) internal successors, (153), 6 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:11:46,323 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:11:46,323 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:11:46,323 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-28 04:11:46,323 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting readerErr0ASSERT_VIOLATIONMEMORY_LEAK === [readerErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-11-28 04:11:46,324 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:11:46,324 INFO L85 PathProgramCache]: Analyzing trace with hash -911065372, now seen corresponding path program 1 times [2024-11-28 04:11:46,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:11:46,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338990877] [2024-11-28 04:11:46,324 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:11:46,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:11:46,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:11:46,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:11:46,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:11:46,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338990877] [2024-11-28 04:11:46,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338990877] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:11:46,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:11:46,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 04:11:46,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926136841] [2024-11-28 04:11:46,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:11:46,408 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 04:11:46,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:11:46,409 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 04:11:46,409 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 04:11:46,466 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 62 [2024-11-28 04:11:46,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 157 transitions, 1038 flow. Second operand has 6 states, 6 states have (on average 26.0) internal successors, (156), 6 states have internal predecessors, (156), 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) [2024-11-28 04:11:46,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:11:46,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 62 [2024-11-28 04:11:46,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:11:48,948 INFO L124 PetriNetUnfolderBase]: 14310/24144 cut-off events. [2024-11-28 04:11:48,949 INFO L125 PetriNetUnfolderBase]: For 36560/36909 co-relation queries the response was YES. [2024-11-28 04:11:49,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70727 conditions, 24144 events. 14310/24144 cut-off events. For 36560/36909 co-relation queries the response was YES. Maximal size of possible extension queue 1226. Compared 194157 event pairs, 3049 based on Foata normal form. 444/24353 useless extension candidates. Maximal degree in co-relation 66403. Up to 7170 conditions per place. [2024-11-28 04:11:49,263 INFO L140 encePairwiseOnDemand]: 51/62 looper letters, 198 selfloop transitions, 87 changer transitions 0/315 dead transitions. [2024-11-28 04:11:49,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 315 transitions, 2346 flow [2024-11-28 04:11:49,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 04:11:49,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-28 04:11:49,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 484 transitions. [2024-11-28 04:11:49,265 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6004962779156328 [2024-11-28 04:11:49,265 INFO L175 Difference]: Start difference. First operand has 105 places, 157 transitions, 1038 flow. Second operand 13 states and 484 transitions. [2024-11-28 04:11:49,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 315 transitions, 2346 flow [2024-11-28 04:11:49,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 315 transitions, 2344 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-11-28 04:11:49,884 INFO L231 Difference]: Finished difference. Result has 121 places, 186 transitions, 1516 flow [2024-11-28 04:11:49,885 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=1036, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1516, PETRI_PLACES=121, PETRI_TRANSITIONS=186} [2024-11-28 04:11:49,886 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 55 predicate places. [2024-11-28 04:11:49,886 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 186 transitions, 1516 flow [2024-11-28 04:11:49,886 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.0) internal successors, (156), 6 states have internal predecessors, (156), 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) [2024-11-28 04:11:49,886 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:11:49,886 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:11:49,887 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-28 04:11:49,887 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting readerErr0ASSERT_VIOLATIONMEMORY_LEAK === [readerErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-11-28 04:11:49,887 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:11:49,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1825893142, now seen corresponding path program 1 times [2024-11-28 04:11:49,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:11:49,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345703535] [2024-11-28 04:11:49,888 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:11:49,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:11:49,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:11:49,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:11:49,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:11:49,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345703535] [2024-11-28 04:11:49,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345703535] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:11:49,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:11:49,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 04:11:49,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611825982] [2024-11-28 04:11:49,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:11:49,974 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 04:11:49,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:11:49,974 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 04:11:49,974 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 04:11:50,015 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 62 [2024-11-28 04:11:50,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 186 transitions, 1516 flow. Second operand has 6 states, 6 states have (on average 26.0) internal successors, (156), 6 states have internal predecessors, (156), 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) [2024-11-28 04:11:50,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:11:50,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 62 [2024-11-28 04:11:50,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:11:52,875 INFO L124 PetriNetUnfolderBase]: 15074/25341 cut-off events. [2024-11-28 04:11:52,875 INFO L125 PetriNetUnfolderBase]: For 55380/55972 co-relation queries the response was YES. [2024-11-28 04:11:52,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78221 conditions, 25341 events. 15074/25341 cut-off events. For 55380/55972 co-relation queries the response was YES. Maximal size of possible extension queue 1278. Compared 202802 event pairs, 2998 based on Foata normal form. 648/25708 useless extension candidates. Maximal degree in co-relation 74131. Up to 7239 conditions per place. [2024-11-28 04:11:53,054 INFO L140 encePairwiseOnDemand]: 51/62 looper letters, 212 selfloop transitions, 94 changer transitions 0/350 dead transitions. [2024-11-28 04:11:53,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 350 transitions, 2914 flow [2024-11-28 04:11:53,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 04:11:53,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-28 04:11:53,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 486 transitions. [2024-11-28 04:11:53,057 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6029776674937966 [2024-11-28 04:11:53,057 INFO L175 Difference]: Start difference. First operand has 121 places, 186 transitions, 1516 flow. Second operand 13 states and 486 transitions. [2024-11-28 04:11:53,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 350 transitions, 2914 flow [2024-11-28 04:11:54,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 350 transitions, 2900 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-11-28 04:11:54,268 INFO L231 Difference]: Finished difference. Result has 136 places, 215 transitions, 2010 flow [2024-11-28 04:11:54,269 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=1502, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2010, PETRI_PLACES=136, PETRI_TRANSITIONS=215} [2024-11-28 04:11:54,269 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 70 predicate places. [2024-11-28 04:11:54,270 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 215 transitions, 2010 flow [2024-11-28 04:11:54,270 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.0) internal successors, (156), 6 states have internal predecessors, (156), 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) [2024-11-28 04:11:54,270 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:11:54,270 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:11:54,270 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-28 04:11:54,270 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting readerErr0ASSERT_VIOLATIONMEMORY_LEAK === [readerErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-11-28 04:11:54,271 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:11:54,271 INFO L85 PathProgramCache]: Analyzing trace with hash -700195909, now seen corresponding path program 1 times [2024-11-28 04:11:54,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:11:54,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118942447] [2024-11-28 04:11:54,271 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:11:54,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:11:54,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-28 04:11:54,291 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-28 04:11:54,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-28 04:11:54,328 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-28 04:11:54,328 INFO L340 BasicCegarLoop]: Counterexample is feasible [2024-11-28 04:11:54,329 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location readerErr0ASSERT_VIOLATIONMEMORY_LEAK (7 of 8 remaining) [2024-11-28 04:11:54,331 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location readerErr0ASSERT_VIOLATIONMEMORY_LEAK (6 of 8 remaining) [2024-11-28 04:11:54,331 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (5 of 8 remaining) [2024-11-28 04:11:54,331 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 8 remaining) [2024-11-28 04:11:54,331 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 8 remaining) [2024-11-28 04:11:54,332 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 8 remaining) [2024-11-28 04:11:54,332 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 8 remaining) [2024-11-28 04:11:54,332 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location readerErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 8 remaining) [2024-11-28 04:11:54,332 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-28 04:11:54,332 INFO L422 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1] [2024-11-28 04:11:54,387 INFO L241 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-11-28 04:11:54,387 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-28 04:11:54,396 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 04:11:54 BasicIcfg [2024-11-28 04:11:54,396 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-28 04:11:54,396 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-28 04:11:54,397 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-28 04:11:54,397 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-28 04:11:54,397 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:11:35" (3/4) ... [2024-11-28 04:11:54,399 INFO L149 WitnessPrinter]: No result that supports witness generation found [2024-11-28 04:11:54,400 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-28 04:11:54,401 INFO L158 Benchmark]: Toolchain (without parser) took 20348.75ms. Allocated memory was 142.6MB in the beginning and 5.9GB in the end (delta: 5.8GB). Free memory was 100.6MB in the beginning and 5.1GB in the end (delta: -5.0GB). Peak memory consumption was 830.0MB. Max. memory is 16.1GB. [2024-11-28 04:11:54,401 INFO L158 Benchmark]: CDTParser took 0.65ms. Allocated memory is still 167.8MB. Free memory is still 104.9MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 04:11:54,401 INFO L158 Benchmark]: CACSL2BoogieTranslator took 504.46ms. Allocated memory is still 142.6MB. Free memory was 100.6MB in the beginning and 80.8MB in the end (delta: 19.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-28 04:11:54,402 INFO L158 Benchmark]: Boogie Procedure Inliner took 54.12ms. Allocated memory is still 142.6MB. Free memory was 80.8MB in the beginning and 78.9MB in the end (delta: 1.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-28 04:11:54,402 INFO L158 Benchmark]: Boogie Preprocessor took 65.56ms. Allocated memory is still 142.6MB. Free memory was 78.9MB in the beginning and 77.4MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 04:11:54,402 INFO L158 Benchmark]: RCFGBuilder took 605.41ms. Allocated memory is still 142.6MB. Free memory was 77.4MB in the beginning and 56.8MB in the end (delta: 20.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-28 04:11:54,402 INFO L158 Benchmark]: TraceAbstraction took 19104.62ms. Allocated memory was 142.6MB in the beginning and 5.9GB in the end (delta: 5.8GB). Free memory was 56.4MB in the beginning and 5.1GB in the end (delta: -5.0GB). Peak memory consumption was 779.7MB. Max. memory is 16.1GB. [2024-11-28 04:11:54,405 INFO L158 Benchmark]: Witness Printer took 3.82ms. Allocated memory is still 5.9GB. Free memory was 5.1GB in the beginning and 5.1GB in the end (delta: 175.2kB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-28 04:11:54,407 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.65ms. Allocated memory is still 167.8MB. Free memory is still 104.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 504.46ms. Allocated memory is still 142.6MB. Free memory was 100.6MB in the beginning and 80.8MB in the end (delta: 19.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 54.12ms. Allocated memory is still 142.6MB. Free memory was 80.8MB in the beginning and 78.9MB in the end (delta: 1.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 65.56ms. Allocated memory is still 142.6MB. Free memory was 78.9MB in the beginning and 77.4MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 605.41ms. Allocated memory is still 142.6MB. Free memory was 77.4MB in the beginning and 56.8MB in the end (delta: 20.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 19104.62ms. Allocated memory was 142.6MB in the beginning and 5.9GB in the end (delta: 5.8GB). Free memory was 56.4MB in the beginning and 5.1GB in the end (delta: -5.0GB). Peak memory consumption was 779.7MB. Max. memory is 16.1GB. * Witness Printer took 3.82ms. Allocated memory is still 5.9GB. Free memory was 5.1GB in the beginning and 5.1GB in the end (delta: 175.2kB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 16]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 16. Possible FailurePath: [L704] 0 int w=0, r=0, x, y; [L748] 0 pthread_t t1, t2, t3, t4; [L749] FCALL, FORK 0 pthread_create(&t1, 0, writer, 0) VAL [r=0, t1=-3, w=0, x=0, y=0] [L750] FCALL, FORK 0 pthread_create(&t2, 0, reader, 0) VAL [r=0, t1=-3, t2=-2, w=0, x=0, y=0] [L724] 2 int l; VAL [\old(arg)={0:0}, arg={0:0}, r=0, w=0, x=0, y=0] [L751] FCALL, FORK 0 pthread_create(&t3, 0, writer, 0) VAL [r=0, t1=-3, t2=-2, t3=-1, w=0, x=0, y=0] [L725] CALL 2 __VERIFIER_atomic_take_read_lock() [L710] CALL 2 assume_abort_if_not(w==0) [L3] COND FALSE 2 !(!cond) [L710] RET 2 assume_abort_if_not(w==0) [L711] 2 r = r+1 [L725] RET 2 __VERIFIER_atomic_take_read_lock() [L727] 2 l = x VAL [\old(arg)={0:0}, arg={0:0}, l=0, r=1, w=0, x=0, y=0] [L730] 2 y = l VAL [\old(arg)={0:0}, arg={0:0}, l=0, r=1, w=0, x=0, y=0] [L733] 2 int ly = y; VAL [\old(arg)={0:0}, arg={0:0}, l=0, ly=0, r=1, w=0, x=0, y=0] [L736] 2 int lx = x; VAL [\old(arg)={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=1, w=0, x=0, y=0] [L738] COND FALSE 2 !(!(ly == lx)) VAL [\old(arg)={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=1, w=0, x=0, y=0] [L740] 2 l = r-1 VAL [\old(arg)={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=1, w=0, x=0, y=0] [L752] FCALL, FORK 0 pthread_create(&t4, 0, reader, 0) VAL [r=1, t1=-3, t2=-2, t3=-1, t4=0, w=0, x=0, y=0] [L724] 4 int l; VAL [\old(arg)={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=1, w=0, x=0, y=0] [L725] CALL 4 __VERIFIER_atomic_take_read_lock() [L710] CALL 4 assume_abort_if_not(w==0) [L3] COND FALSE 4 !(!cond) [L710] RET 4 assume_abort_if_not(w==0) [L711] 4 r = r+1 [L725] RET 4 __VERIFIER_atomic_take_read_lock() [L743] 2 r = l VAL [\old(arg)={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=0, w=0, x=0, y=0] [L714] CALL 1 __VERIFIER_atomic_take_write_lock() [L706] CALL 1 assume_abort_if_not(w==0 && r==0) [L3] COND FALSE 1 !(!cond) [L706] RET 1 assume_abort_if_not(w==0 && r==0) [L707] 1 w = 1 [L714] RET 1 __VERIFIER_atomic_take_write_lock() [L727] 4 l = x VAL [\old(arg)={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=0, w=1, x=0, y=0] [L730] 4 y = l VAL [\old(arg)={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=0, w=1, x=0, y=0] [L733] 4 int ly = y; VAL [\old(arg)={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=0, w=1, x=0, y=0] [L716] 1 x = 3 VAL [\old(arg)={0:0}, arg={0:0}, r=0, w=1, x=3, y=0] [L736] 4 int lx = x; VAL [\old(arg)={0:0}, arg={0:0}, l=0, lx=3, ly=0, r=0, w=1, x=3, y=0] [L738] COND TRUE 4 !(ly == lx) [L738] CALL 4 reach_error() [L16] COND FALSE 4 !(0) VAL [r=0, w=1, x=3, y=0] [L16] 4 __assert_fail ("0", "read_write_lock-2.c", 7, __extension__ __PRETTY_FUNCTION__) VAL [r=0, w=1, x=3, y=0] - UnprovableResult [Line: 747]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 752]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 749]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 750]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 751]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 84 locations, 8 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 18.9s, OverallIterations: 7, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 17.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 760 SdHoareTripleChecker+Valid, 2.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 683 mSDsluCounter, 308 SdHoareTripleChecker+Invalid, 1.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 193 mSDsCounter, 19 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1870 IncrementalHoareTripleChecker+Invalid, 1889 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 19 mSolverCounterUnsat, 115 mSDtfsCounter, 1870 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 64 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2010occurred in iteration=6, InterpolantAutomatonStates: 59, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 133 NumberOfCodeBlocks, 133 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 98 ConstructedInterpolants, 0 QuantifiedInterpolants, 154 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2024-11-28 04:11:54,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_377060aa-a503-4da8-8627-4b1dbc6a764e/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_377060aa-a503-4da8-8627-4b1dbc6a764e/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_377060aa-a503-4da8-8627-4b1dbc6a764e/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_377060aa-a503-4da8-8627-4b1dbc6a764e/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_377060aa-a503-4da8-8627-4b1dbc6a764e/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-atomic/read_write_lock-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_377060aa-a503-4da8-8627-4b1dbc6a764e/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_377060aa-a503-4da8-8627-4b1dbc6a764e/bin/uautomizer-verify-aQ6SnzHsRB --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3e2f466b16db44ce2fec1aabf9e70b4ab734ef2801c32e66d10c5bcbcceb5301 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 04:11:57,170 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 04:11:57,288 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_377060aa-a503-4da8-8627-4b1dbc6a764e/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2024-11-28 04:11:57,294 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 04:11:57,294 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 04:11:57,336 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 04:11:57,340 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 04:11:57,340 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 04:11:57,341 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 04:11:57,341 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 04:11:57,341 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 04:11:57,341 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 04:11:57,341 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 04:11:57,342 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 04:11:57,342 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 04:11:57,342 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 04:11:57,342 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 04:11:57,342 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 04:11:57,342 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 04:11:57,342 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 04:11:57,342 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-28 04:11:57,342 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-28 04:11:57,342 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-28 04:11:57,343 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 04:11:57,343 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-28 04:11:57,343 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-28 04:11:57,343 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-28 04:11:57,343 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-28 04:11:57,343 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 04:11:57,343 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 04:11:57,343 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 04:11:57,343 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 04:11:57,343 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:11:57,346 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:11:57,346 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:11:57,347 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:11:57,347 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 04:11:57,347 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:11:57,347 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:11:57,348 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:11:57,348 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:11:57,348 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 04:11:57,348 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 04:11:57,348 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2024-11-28 04:11:57,348 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-28 04:11:57,348 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 04:11:57,349 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 04:11:57,349 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 04:11:57,349 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 04:11:57,349 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_377060aa-a503-4da8-8627-4b1dbc6a764e/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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> 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 -> 3e2f466b16db44ce2fec1aabf9e70b4ab734ef2801c32e66d10c5bcbcceb5301 [2024-11-28 04:11:57,686 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 04:11:57,695 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 04:11:57,697 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 04:11:57,699 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 04:11:57,699 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 04:11:57,700 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_377060aa-a503-4da8-8627-4b1dbc6a764e/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/pthread-atomic/read_write_lock-2.i [2024-11-28 04:12:00,751 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_377060aa-a503-4da8-8627-4b1dbc6a764e/bin/uautomizer-verify-aQ6SnzHsRB/data/54ddda776/4d889c5c5ba64efdbd38448aae30321e/FLAG6ef64a9cf [2024-11-28 04:12:01,116 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 04:12:01,119 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_377060aa-a503-4da8-8627-4b1dbc6a764e/sv-benchmarks/c/pthread-atomic/read_write_lock-2.i [2024-11-28 04:12:01,139 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_377060aa-a503-4da8-8627-4b1dbc6a764e/bin/uautomizer-verify-aQ6SnzHsRB/data/54ddda776/4d889c5c5ba64efdbd38448aae30321e/FLAG6ef64a9cf [2024-11-28 04:12:01,162 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_377060aa-a503-4da8-8627-4b1dbc6a764e/bin/uautomizer-verify-aQ6SnzHsRB/data/54ddda776/4d889c5c5ba64efdbd38448aae30321e [2024-11-28 04:12:01,164 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 04:12:01,167 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 04:12:01,169 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 04:12:01,169 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 04:12:01,174 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 04:12:01,174 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:12:01" (1/1) ... [2024-11-28 04:12:01,175 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45198d91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:12:01, skipping insertion in model container [2024-11-28 04:12:01,177 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:12:01" (1/1) ... [2024-11-28 04:12:01,220 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 04:12:01,616 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:12:01,632 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 04:12:01,699 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:12:01,748 INFO L204 MainTranslator]: Completed translation [2024-11-28 04:12:01,748 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:12:01 WrapperNode [2024-11-28 04:12:01,749 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 04:12:01,750 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 04:12:01,751 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 04:12:01,751 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 04:12:01,760 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:12:01" (1/1) ... [2024-11-28 04:12:01,784 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:12:01" (1/1) ... [2024-11-28 04:12:01,812 INFO L138 Inliner]: procedures = 173, calls = 31, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 97 [2024-11-28 04:12:01,814 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 04:12:01,815 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 04:12:01,815 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 04:12:01,815 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 04:12:01,824 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:12:01" (1/1) ... [2024-11-28 04:12:01,825 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:12:01" (1/1) ... [2024-11-28 04:12:01,832 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:12:01" (1/1) ... [2024-11-28 04:12:01,856 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-28 04:12:01,857 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:12:01" (1/1) ... [2024-11-28 04:12:01,858 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:12:01" (1/1) ... [2024-11-28 04:12:01,867 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:12:01" (1/1) ... [2024-11-28 04:12:01,868 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:12:01" (1/1) ... [2024-11-28 04:12:01,873 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:12:01" (1/1) ... [2024-11-28 04:12:01,874 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:12:01" (1/1) ... [2024-11-28 04:12:01,877 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:12:01" (1/1) ... [2024-11-28 04:12:01,880 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 04:12:01,884 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 04:12:01,884 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 04:12:01,884 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 04:12:01,885 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:12:01" (1/1) ... [2024-11-28 04:12:01,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:12:01,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_377060aa-a503-4da8-8627-4b1dbc6a764e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:12:01,927 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_377060aa-a503-4da8-8627-4b1dbc6a764e/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 04:12:01,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_377060aa-a503-4da8-8627-4b1dbc6a764e/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 04:12:01,959 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-28 04:12:01,960 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 04:12:01,960 INFO L130 BoogieDeclarations]: Found specification of procedure reader [2024-11-28 04:12:01,960 INFO L138 BoogieDeclarations]: Found implementation of procedure reader [2024-11-28 04:12:01,961 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-28 04:12:01,961 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-28 04:12:01,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 04:12:01,961 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 04:12:01,962 INFO L130 BoogieDeclarations]: Found specification of procedure writer [2024-11-28 04:12:01,962 INFO L138 BoogieDeclarations]: Found implementation of procedure writer [2024-11-28 04:12:01,963 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-28 04:12:02,147 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 04:12:02,149 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 04:12:02,347 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-28 04:12:02,347 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 04:12:02,561 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 04:12:02,563 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-28 04:12:02,566 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:12:02 BoogieIcfgContainer [2024-11-28 04:12:02,566 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 04:12:02,569 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 04:12:02,569 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 04:12:02,575 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 04:12:02,575 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 04:12:01" (1/3) ... [2024-11-28 04:12:02,577 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35c48e8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:12:02, skipping insertion in model container [2024-11-28 04:12:02,577 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:12:01" (2/3) ... [2024-11-28 04:12:02,577 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35c48e8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:12:02, skipping insertion in model container [2024-11-28 04:12:02,578 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:12:02" (3/3) ... [2024-11-28 04:12:02,579 INFO L128 eAbstractionObserver]: Analyzing ICFG read_write_lock-2.i [2024-11-28 04:12:02,591 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 04:12:02,593 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG read_write_lock-2.i that has 3 procedures, 38 locations, 1 initial locations, 0 loop locations, and 2 error locations. [2024-11-28 04:12:02,593 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-28 04:12:02,662 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-28 04:12:02,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 71 places, 62 transitions, 152 flow [2024-11-28 04:12:02,787 INFO L124 PetriNetUnfolderBase]: 4/58 cut-off events. [2024-11-28 04:12:02,794 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-28 04:12:02,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75 conditions, 58 events. 4/58 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 125 event pairs, 0 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 55. Up to 2 conditions per place. [2024-11-28 04:12:02,799 INFO L82 GeneralOperation]: Start removeDead. Operand has 71 places, 62 transitions, 152 flow [2024-11-28 04:12:02,803 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 57 transitions, 138 flow [2024-11-28 04:12:02,811 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 04:12:02,824 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=None, 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;@23dbf306, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 04:12:02,824 INFO L334 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-11-28 04:12:02,850 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-28 04:12:02,850 INFO L124 PetriNetUnfolderBase]: 2/38 cut-off events. [2024-11-28 04:12:02,850 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-28 04:12:02,850 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:12:02,852 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:12:02,852 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting readerErr0ASSERT_VIOLATIONMEMORY_LEAK === [readerErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-11-28 04:12:02,858 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:12:02,859 INFO L85 PathProgramCache]: Analyzing trace with hash 398639909, now seen corresponding path program 1 times [2024-11-28 04:12:02,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:12:02,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [628228004] [2024-11-28 04:12:02,872 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:12:02,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:12:02,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_377060aa-a503-4da8-8627-4b1dbc6a764e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:12:02,877 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_377060aa-a503-4da8-8627-4b1dbc6a764e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:12:02,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_377060aa-a503-4da8-8627-4b1dbc6a764e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 04:12:03,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:12:03,027 INFO L256 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-28 04:12:03,034 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:12:03,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:12:03,132 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:12:03,133 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:12:03,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628228004] [2024-11-28 04:12:03,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628228004] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:12:03,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:12:03,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 04:12:03,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551729782] [2024-11-28 04:12:03,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:12:03,143 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 04:12:03,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:12:03,170 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 04:12:03,171 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 04:12:03,291 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 62 [2024-11-28 04:12:03,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 57 transitions, 138 flow. Second operand has 6 states, 6 states have (on average 24.833333333333332) internal successors, (149), 6 states have internal predecessors, (149), 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) [2024-11-28 04:12:03,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:12:03,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 62 [2024-11-28 04:12:03,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:12:06,952 INFO L124 PetriNetUnfolderBase]: 14102/24413 cut-off events. [2024-11-28 04:12:06,953 INFO L125 PetriNetUnfolderBase]: For 2090/2090 co-relation queries the response was YES. [2024-11-28 04:12:07,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45376 conditions, 24413 events. 14102/24413 cut-off events. For 2090/2090 co-relation queries the response was YES. Maximal size of possible extension queue 1206. Compared 210051 event pairs, 1535 based on Foata normal form. 2538/26328 useless extension candidates. Maximal degree in co-relation 40077. Up to 6266 conditions per place. [2024-11-28 04:12:07,146 INFO L140 encePairwiseOnDemand]: 47/62 looper letters, 179 selfloop transitions, 37 changer transitions 0/233 dead transitions. [2024-11-28 04:12:07,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 233 transitions, 1015 flow [2024-11-28 04:12:07,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 04:12:07,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-28 04:12:07,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 544 transitions. [2024-11-28 04:12:07,168 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.674937965260546 [2024-11-28 04:12:07,171 INFO L175 Difference]: Start difference. First operand has 66 places, 57 transitions, 138 flow. Second operand 13 states and 544 transitions. [2024-11-28 04:12:07,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 233 transitions, 1015 flow [2024-11-28 04:12:07,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 233 transitions, 937 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-28 04:12:07,215 INFO L231 Difference]: Finished difference. Result has 76 places, 90 transitions, 353 flow [2024-11-28 04:12:07,217 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=353, PETRI_PLACES=76, PETRI_TRANSITIONS=90} [2024-11-28 04:12:07,221 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 10 predicate places. [2024-11-28 04:12:07,221 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 90 transitions, 353 flow [2024-11-28 04:12:07,222 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.833333333333332) internal successors, (149), 6 states have internal predecessors, (149), 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) [2024-11-28 04:12:07,222 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:12:07,222 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:12:07,232 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_377060aa-a503-4da8-8627-4b1dbc6a764e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-28 04:12:07,426 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_377060aa-a503-4da8-8627-4b1dbc6a764e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:12:07,426 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting readerErr0ASSERT_VIOLATIONMEMORY_LEAK === [readerErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-11-28 04:12:07,427 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:12:07,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1322923133, now seen corresponding path program 1 times [2024-11-28 04:12:07,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:12:07,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1988487960] [2024-11-28 04:12:07,428 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:12:07,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:12:07,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_377060aa-a503-4da8-8627-4b1dbc6a764e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:12:07,431 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_377060aa-a503-4da8-8627-4b1dbc6a764e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:12:07,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_377060aa-a503-4da8-8627-4b1dbc6a764e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 04:12:07,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:12:07,527 INFO L256 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-28 04:12:07,528 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:12:07,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:12:07,546 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:12:07,546 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:12:07,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988487960] [2024-11-28 04:12:07,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988487960] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:12:07,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:12:07,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 04:12:07,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556784177] [2024-11-28 04:12:07,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:12:07,548 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 04:12:07,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:12:07,549 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 04:12:07,549 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 04:12:07,554 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 62 [2024-11-28 04:12:07,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 90 transitions, 353 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) [2024-11-28 04:12:07,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:12:07,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 62 [2024-11-28 04:12:07,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:12:09,178 INFO L124 PetriNetUnfolderBase]: 6853/13824 cut-off events. [2024-11-28 04:12:09,178 INFO L125 PetriNetUnfolderBase]: For 4754/5073 co-relation queries the response was YES. [2024-11-28 04:12:09,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28252 conditions, 13824 events. 6853/13824 cut-off events. For 4754/5073 co-relation queries the response was YES. Maximal size of possible extension queue 921. Compared 133157 event pairs, 2733 based on Foata normal form. 709/13627 useless extension candidates. Maximal degree in co-relation 22097. Up to 5355 conditions per place. [2024-11-28 04:12:09,330 INFO L140 encePairwiseOnDemand]: 56/62 looper letters, 40 selfloop transitions, 4 changer transitions 0/107 dead transitions. [2024-11-28 04:12:09,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 107 transitions, 486 flow [2024-11-28 04:12:09,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 04:12:09,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 04:12:09,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 138 transitions. [2024-11-28 04:12:09,333 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7419354838709677 [2024-11-28 04:12:09,333 INFO L175 Difference]: Start difference. First operand has 76 places, 90 transitions, 353 flow. Second operand 3 states and 138 transitions. [2024-11-28 04:12:09,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 107 transitions, 486 flow [2024-11-28 04:12:09,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 107 transitions, 486 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-28 04:12:09,513 INFO L231 Difference]: Finished difference. Result has 79 places, 90 transitions, 369 flow [2024-11-28 04:12:09,515 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=369, PETRI_PLACES=79, PETRI_TRANSITIONS=90} [2024-11-28 04:12:09,516 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 13 predicate places. [2024-11-28 04:12:09,516 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 90 transitions, 369 flow [2024-11-28 04:12:09,516 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) [2024-11-28 04:12:09,516 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:12:09,516 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:12:09,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_377060aa-a503-4da8-8627-4b1dbc6a764e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-28 04:12:09,717 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_377060aa-a503-4da8-8627-4b1dbc6a764e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:12:09,718 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting readerErr0ASSERT_VIOLATIONMEMORY_LEAK === [readerErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-11-28 04:12:09,718 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:12:09,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1792466541, now seen corresponding path program 2 times [2024-11-28 04:12:09,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:12:09,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [220232992] [2024-11-28 04:12:09,719 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:12:09,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:12:09,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_377060aa-a503-4da8-8627-4b1dbc6a764e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:12:09,722 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_377060aa-a503-4da8-8627-4b1dbc6a764e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:12:09,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_377060aa-a503-4da8-8627-4b1dbc6a764e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 04:12:09,809 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 04:12:09,809 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:12:09,810 INFO L256 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-28 04:12:09,812 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:12:09,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:12:09,851 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:12:09,851 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:12:09,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220232992] [2024-11-28 04:12:09,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220232992] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:12:09,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:12:09,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 04:12:09,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096437495] [2024-11-28 04:12:09,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:12:09,853 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:12:09,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:12:09,853 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:12:09,853 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:12:09,872 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 62 [2024-11-28 04:12:09,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 90 transitions, 369 flow. Second operand has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 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) [2024-11-28 04:12:09,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:12:09,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 62 [2024-11-28 04:12:09,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:12:11,808 INFO L124 PetriNetUnfolderBase]: 10042/19609 cut-off events. [2024-11-28 04:12:11,808 INFO L125 PetriNetUnfolderBase]: For 9818/10163 co-relation queries the response was YES. [2024-11-28 04:12:11,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42115 conditions, 19609 events. 10042/19609 cut-off events. For 9818/10163 co-relation queries the response was YES. Maximal size of possible extension queue 1413. Compared 191525 event pairs, 3002 based on Foata normal form. 273/18856 useless extension candidates. Maximal degree in co-relation 34821. Up to 7305 conditions per place. [2024-11-28 04:12:12,069 INFO L140 encePairwiseOnDemand]: 55/62 looper letters, 58 selfloop transitions, 11 changer transitions 0/132 dead transitions. [2024-11-28 04:12:12,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 132 transitions, 622 flow [2024-11-28 04:12:12,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:12:12,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 04:12:12,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 191 transitions. [2024-11-28 04:12:12,071 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7701612903225806 [2024-11-28 04:12:12,071 INFO L175 Difference]: Start difference. First operand has 79 places, 90 transitions, 369 flow. Second operand 4 states and 191 transitions. [2024-11-28 04:12:12,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 132 transitions, 622 flow [2024-11-28 04:12:12,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 132 transitions, 610 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 04:12:12,323 INFO L231 Difference]: Finished difference. Result has 82 places, 100 transitions, 444 flow [2024-11-28 04:12:12,324 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=361, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=444, PETRI_PLACES=82, PETRI_TRANSITIONS=100} [2024-11-28 04:12:12,324 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 16 predicate places. [2024-11-28 04:12:12,325 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 100 transitions, 444 flow [2024-11-28 04:12:12,325 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 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) [2024-11-28 04:12:12,325 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:12:12,325 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:12:12,334 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_377060aa-a503-4da8-8627-4b1dbc6a764e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-28 04:12:12,525 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_377060aa-a503-4da8-8627-4b1dbc6a764e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:12:12,526 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting readerErr0ASSERT_VIOLATIONMEMORY_LEAK === [readerErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-11-28 04:12:12,526 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:12:12,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1308458934, now seen corresponding path program 1 times [2024-11-28 04:12:12,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:12:12,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1296270782] [2024-11-28 04:12:12,527 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:12:12,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:12:12,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_377060aa-a503-4da8-8627-4b1dbc6a764e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:12:12,531 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_377060aa-a503-4da8-8627-4b1dbc6a764e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:12:12,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_377060aa-a503-4da8-8627-4b1dbc6a764e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 04:12:12,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:12:12,611 INFO L256 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-28 04:12:12,612 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:12:12,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:12:12,654 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:12:12,654 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:12:12,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296270782] [2024-11-28 04:12:12,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296270782] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:12:12,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:12:12,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 04:12:12,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119483315] [2024-11-28 04:12:12,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:12:12,655 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 04:12:12,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:12:12,656 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 04:12:12,656 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 04:12:12,740 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 62 [2024-11-28 04:12:12,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 100 transitions, 444 flow. Second operand has 6 states, 6 states have (on average 25.5) internal successors, (153), 6 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:12:12,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:12:12,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 62 [2024-11-28 04:12:12,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:12:18,241 INFO L124 PetriNetUnfolderBase]: 39831/66882 cut-off events. [2024-11-28 04:12:18,241 INFO L125 PetriNetUnfolderBase]: For 60521/62209 co-relation queries the response was YES. [2024-11-28 04:12:18,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166610 conditions, 66882 events. 39831/66882 cut-off events. For 60521/62209 co-relation queries the response was YES. Maximal size of possible extension queue 4079. Compared 638284 event pairs, 5836 based on Foata normal form. 1154/66067 useless extension candidates. Maximal degree in co-relation 138036. Up to 14971 conditions per place. [2024-11-28 04:12:18,651 INFO L140 encePairwiseOnDemand]: 51/62 looper letters, 251 selfloop transitions, 153 changer transitions 0/434 dead transitions. [2024-11-28 04:12:18,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 434 transitions, 2802 flow [2024-11-28 04:12:18,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 04:12:18,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-28 04:12:18,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 510 transitions. [2024-11-28 04:12:18,653 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6327543424317618 [2024-11-28 04:12:18,653 INFO L175 Difference]: Start difference. First operand has 82 places, 100 transitions, 444 flow. Second operand 13 states and 510 transitions. [2024-11-28 04:12:18,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 434 transitions, 2802 flow [2024-11-28 04:12:22,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 434 transitions, 2784 flow, removed 9 selfloop flow, removed 0 redundant places. [2024-11-28 04:12:22,553 INFO L231 Difference]: Finished difference. Result has 102 places, 275 transitions, 2009 flow [2024-11-28 04:12:22,554 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=440, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2009, PETRI_PLACES=102, PETRI_TRANSITIONS=275} [2024-11-28 04:12:22,556 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 36 predicate places. [2024-11-28 04:12:22,556 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 275 transitions, 2009 flow [2024-11-28 04:12:22,556 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.5) internal successors, (153), 6 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:12:22,557 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:12:22,557 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:12:22,566 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_377060aa-a503-4da8-8627-4b1dbc6a764e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-28 04:12:22,757 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_377060aa-a503-4da8-8627-4b1dbc6a764e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:12:22,757 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting readerErr0ASSERT_VIOLATIONMEMORY_LEAK === [readerErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-11-28 04:12:22,758 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:12:22,758 INFO L85 PathProgramCache]: Analyzing trace with hash -138968134, now seen corresponding path program 1 times [2024-11-28 04:12:22,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:12:22,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [437450884] [2024-11-28 04:12:22,758 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:12:22,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:12:22,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_377060aa-a503-4da8-8627-4b1dbc6a764e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:12:22,760 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_377060aa-a503-4da8-8627-4b1dbc6a764e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:12:22,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_377060aa-a503-4da8-8627-4b1dbc6a764e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 04:12:22,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:12:22,846 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-28 04:12:22,847 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:12:22,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:12:22,893 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:12:22,893 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:12:22,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437450884] [2024-11-28 04:12:22,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437450884] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:12:22,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:12:22,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 04:12:22,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136753040] [2024-11-28 04:12:22,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:12:22,894 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 04:12:22,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:12:22,894 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 04:12:22,894 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 04:12:22,956 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 62 [2024-11-28 04:12:22,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 275 transitions, 2009 flow. Second operand has 6 states, 6 states have (on average 26.0) internal successors, (156), 6 states have internal predecessors, (156), 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) [2024-11-28 04:12:22,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:12:22,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 62 [2024-11-28 04:12:22,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:12:30,200 INFO L124 PetriNetUnfolderBase]: 44162/73397 cut-off events. [2024-11-28 04:12:30,200 INFO L125 PetriNetUnfolderBase]: For 114943/116223 co-relation queries the response was YES. [2024-11-28 04:12:30,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219204 conditions, 73397 events. 44162/73397 cut-off events. For 114943/116223 co-relation queries the response was YES. Maximal size of possible extension queue 4404. Compared 700880 event pairs, 7853 based on Foata normal form. 1478/73757 useless extension candidates. Maximal degree in co-relation 189967. Up to 21084 conditions per place. [2024-11-28 04:12:30,864 INFO L140 encePairwiseOnDemand]: 51/62 looper letters, 280 selfloop transitions, 223 changer transitions 0/533 dead transitions. [2024-11-28 04:12:30,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 533 transitions, 4501 flow [2024-11-28 04:12:30,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 04:12:30,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-28 04:12:30,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 502 transitions. [2024-11-28 04:12:30,868 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6228287841191067 [2024-11-28 04:12:30,868 INFO L175 Difference]: Start difference. First operand has 102 places, 275 transitions, 2009 flow. Second operand 13 states and 502 transitions. [2024-11-28 04:12:30,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 533 transitions, 4501 flow [2024-11-28 04:12:40,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 533 transitions, 4499 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-11-28 04:12:40,943 INFO L231 Difference]: Finished difference. Result has 122 places, 363 transitions, 3507 flow [2024-11-28 04:12:40,943 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=2007, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3507, PETRI_PLACES=122, PETRI_TRANSITIONS=363} [2024-11-28 04:12:40,944 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 56 predicate places. [2024-11-28 04:12:40,944 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 363 transitions, 3507 flow [2024-11-28 04:12:40,944 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.0) internal successors, (156), 6 states have internal predecessors, (156), 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) [2024-11-28 04:12:40,944 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:12:40,944 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:12:40,957 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_377060aa-a503-4da8-8627-4b1dbc6a764e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-28 04:12:41,145 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_377060aa-a503-4da8-8627-4b1dbc6a764e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:12:41,145 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting readerErr0ASSERT_VIOLATIONMEMORY_LEAK === [readerErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-11-28 04:12:41,145 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:12:41,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1647609722, now seen corresponding path program 1 times [2024-11-28 04:12:41,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:12:41,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [607048431] [2024-11-28 04:12:41,146 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:12:41,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:12:41,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_377060aa-a503-4da8-8627-4b1dbc6a764e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:12:41,147 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_377060aa-a503-4da8-8627-4b1dbc6a764e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:12:41,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_377060aa-a503-4da8-8627-4b1dbc6a764e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 04:12:41,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:12:41,215 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-28 04:12:41,217 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:12:41,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:12:41,269 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:12:41,269 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:12:41,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607048431] [2024-11-28 04:12:41,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607048431] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:12:41,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:12:41,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 04:12:41,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234678429] [2024-11-28 04:12:41,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:12:41,269 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 04:12:41,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:12:41,270 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 04:12:41,270 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 04:12:41,332 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 62 [2024-11-28 04:12:41,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 363 transitions, 3507 flow. Second operand has 6 states, 6 states have (on average 26.0) internal successors, (156), 6 states have internal predecessors, (156), 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) [2024-11-28 04:12:41,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:12:41,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 62 [2024-11-28 04:12:41,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:12:49,620 INFO L124 PetriNetUnfolderBase]: 46598/77018 cut-off events. [2024-11-28 04:12:49,621 INFO L125 PetriNetUnfolderBase]: For 200392/202488 co-relation queries the response was YES. [2024-11-28 04:12:50,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 250258 conditions, 77018 events. 46598/77018 cut-off events. For 200392/202488 co-relation queries the response was YES. Maximal size of possible extension queue 4635. Compared 735238 event pairs, 8083 based on Foata normal form. 1785/77377 useless extension candidates. Maximal degree in co-relation 222700. Up to 22881 conditions per place. [2024-11-28 04:12:50,358 INFO L140 encePairwiseOnDemand]: 51/62 looper letters, 327 selfloop transitions, 268 changer transitions 0/645 dead transitions. [2024-11-28 04:12:50,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 645 transitions, 6612 flow [2024-11-28 04:12:50,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 04:12:50,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-28 04:12:50,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 506 transitions. [2024-11-28 04:12:50,362 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6277915632754343 [2024-11-28 04:12:50,362 INFO L175 Difference]: Start difference. First operand has 122 places, 363 transitions, 3507 flow. Second operand 13 states and 506 transitions. [2024-11-28 04:12:50,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 645 transitions, 6612 flow