./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-commit-2.wvr-bad.c --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_157d567c-29b3-4a8e-80c0-01c01e94d918/bin/uautomizer-verify-84ZbGMXZE1/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157d567c-29b3-4a8e-80c0-01c01e94d918/bin/uautomizer-verify-84ZbGMXZE1/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157d567c-29b3-4a8e-80c0-01c01e94d918/bin/uautomizer-verify-84ZbGMXZE1/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157d567c-29b3-4a8e-80c0-01c01e94d918/bin/uautomizer-verify-84ZbGMXZE1/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-commit-2.wvr-bad.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157d567c-29b3-4a8e-80c0-01c01e94d918/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157d567c-29b3-4a8e-80c0-01c01e94d918/bin/uautomizer-verify-84ZbGMXZE1 --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 5bf746ef76f8c8352051d8eb5f02d7a475e14d238622e290fcb51135a3348206 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-12-02 09:02:01,801 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-12-02 09:02:01,859 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157d567c-29b3-4a8e-80c0-01c01e94d918/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-12-02 09:02:01,865 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-12-02 09:02:01,865 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-12-02 09:02:01,887 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-12-02 09:02:01,888 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-12-02 09:02:01,888 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-12-02 09:02:01,888 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-12-02 09:02:01,888 INFO L153 SettingsManager]: * Use memory slicer=true [2024-12-02 09:02:01,889 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-12-02 09:02:01,889 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-12-02 09:02:01,889 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-12-02 09:02:01,889 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-12-02 09:02:01,889 INFO L153 SettingsManager]: * Use SBE=true [2024-12-02 09:02:01,889 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-12-02 09:02:01,889 INFO L153 SettingsManager]: * sizeof long=4 [2024-12-02 09:02:01,890 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-12-02 09:02:01,890 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-12-02 09:02:01,890 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-12-02 09:02:01,890 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-12-02 09:02:01,890 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-12-02 09:02:01,890 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-12-02 09:02:01,890 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-12-02 09:02:01,890 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-12-02 09:02:01,890 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-12-02 09:02:01,890 INFO L153 SettingsManager]: * sizeof long double=12 [2024-12-02 09:02:01,890 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-12-02 09:02:01,890 INFO L153 SettingsManager]: * Use constant arrays=true [2024-12-02 09:02:01,891 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-12-02 09:02:01,891 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 09:02:01,891 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 09:02:01,891 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 09:02:01,891 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 09:02:01,891 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-12-02 09:02:01,891 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 09:02:01,891 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 09:02:01,891 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 09:02:01,891 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 09:02:01,891 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-12-02 09:02:01,892 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-12-02 09:02:01,892 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-12-02 09:02:01,892 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-12-02 09:02:01,892 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-12-02 09:02:01,892 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-12-02 09:02:01,892 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-12-02 09:02:01,892 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-12-02 09:02:01,892 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_157d567c-29b3-4a8e-80c0-01c01e94d918/bin/uautomizer-verify-84ZbGMXZE1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G 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 -> 5bf746ef76f8c8352051d8eb5f02d7a475e14d238622e290fcb51135a3348206 [2024-12-02 09:02:02,132 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-12-02 09:02:02,140 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-12-02 09:02:02,143 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-12-02 09:02:02,144 INFO L270 PluginConnector]: Initializing CDTParser... [2024-12-02 09:02:02,144 INFO L274 PluginConnector]: CDTParser initialized [2024-12-02 09:02:02,145 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157d567c-29b3-4a8e-80c0-01c01e94d918/bin/uautomizer-verify-84ZbGMXZE1/../../sv-benchmarks/c/weaver/popl20-bad-commit-2.wvr-bad.c [2024-12-02 09:02:04,823 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157d567c-29b3-4a8e-80c0-01c01e94d918/bin/uautomizer-verify-84ZbGMXZE1/data/69d252ae3/4029f5b0932f4d85b2e7b6b89c7ea8e3/FLAG09c4c2c85 [2024-12-02 09:02:05,019 INFO L384 CDTParser]: Found 1 translation units. [2024-12-02 09:02:05,020 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157d567c-29b3-4a8e-80c0-01c01e94d918/sv-benchmarks/c/weaver/popl20-bad-commit-2.wvr-bad.c [2024-12-02 09:02:05,028 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157d567c-29b3-4a8e-80c0-01c01e94d918/bin/uautomizer-verify-84ZbGMXZE1/data/69d252ae3/4029f5b0932f4d85b2e7b6b89c7ea8e3/FLAG09c4c2c85 [2024-12-02 09:02:05,051 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157d567c-29b3-4a8e-80c0-01c01e94d918/bin/uautomizer-verify-84ZbGMXZE1/data/69d252ae3/4029f5b0932f4d85b2e7b6b89c7ea8e3 [2024-12-02 09:02:05,053 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-12-02 09:02:05,055 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-12-02 09:02:05,056 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-12-02 09:02:05,056 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-12-02 09:02:05,060 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-12-02 09:02:05,060 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 09:02:05" (1/1) ... [2024-12-02 09:02:05,061 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bba9bb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 09:02:05, skipping insertion in model container [2024-12-02 09:02:05,061 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 09:02:05" (1/1) ... [2024-12-02 09:02:05,076 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-12-02 09:02:05,230 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-12-02 09:02:05,232 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 09:02:05,240 INFO L200 MainTranslator]: Completed pre-run [2024-12-02 09:02:05,274 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 09:02:05,286 INFO L204 MainTranslator]: Completed translation [2024-12-02 09:02:05,287 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 09:02:05 WrapperNode [2024-12-02 09:02:05,287 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-12-02 09:02:05,287 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-12-02 09:02:05,287 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-12-02 09:02:05,288 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-12-02 09:02:05,292 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 09:02:05" (1/1) ... [2024-12-02 09:02:05,299 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 09:02:05" (1/1) ... [2024-12-02 09:02:05,329 INFO L138 Inliner]: procedures = 25, calls = 74, calls flagged for inlining = 28, calls inlined = 34, statements flattened = 455 [2024-12-02 09:02:05,330 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-12-02 09:02:05,330 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-12-02 09:02:05,330 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-12-02 09:02:05,330 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-12-02 09:02:05,339 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 09:02:05" (1/1) ... [2024-12-02 09:02:05,340 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 09:02:05" (1/1) ... [2024-12-02 09:02:05,344 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 09:02:05" (1/1) ... [2024-12-02 09:02:05,362 INFO L175 MemorySlicer]: Split 18 memory accesses to 2 slices as follows [2, 16]. 89 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 4 writes are split as follows [0, 4]. [2024-12-02 09:02:05,362 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 09:02:05" (1/1) ... [2024-12-02 09:02:05,363 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 09:02:05" (1/1) ... [2024-12-02 09:02:05,374 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 09:02:05" (1/1) ... [2024-12-02 09:02:05,375 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 09:02:05" (1/1) ... [2024-12-02 09:02:05,381 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 09:02:05" (1/1) ... [2024-12-02 09:02:05,383 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 09:02:05" (1/1) ... [2024-12-02 09:02:05,384 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 09:02:05" (1/1) ... [2024-12-02 09:02:05,388 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-12-02 09:02:05,389 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-12-02 09:02:05,389 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-12-02 09:02:05,389 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-12-02 09:02:05,390 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 09:02:05" (1/1) ... [2024-12-02 09:02:05,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 09:02:05,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157d567c-29b3-4a8e-80c0-01c01e94d918/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 09:02:05,418 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157d567c-29b3-4a8e-80c0-01c01e94d918/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-12-02 09:02:05,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157d567c-29b3-4a8e-80c0-01c01e94d918/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-12-02 09:02:05,440 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-12-02 09:02:05,440 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-12-02 09:02:05,440 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-12-02 09:02:05,440 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-12-02 09:02:05,440 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-12-02 09:02:05,440 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-12-02 09:02:05,440 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-12-02 09:02:05,440 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-12-02 09:02:05,440 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-12-02 09:02:05,440 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-12-02 09:02:05,441 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-12-02 09:02:05,441 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-12-02 09:02:05,441 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-12-02 09:02:05,441 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-12-02 09:02:05,441 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-12-02 09:02:05,441 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-12-02 09:02:05,441 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-12-02 09:02:05,441 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-12-02 09:02:05,441 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-12-02 09:02:05,441 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-12-02 09:02:05,443 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-12-02 09:02:05,545 INFO L234 CfgBuilder]: Building ICFG [2024-12-02 09:02:05,546 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-12-02 09:02:06,140 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-12-02 09:02:06,141 INFO L283 CfgBuilder]: Performing block encoding [2024-12-02 09:02:06,555 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-12-02 09:02:06,556 INFO L312 CfgBuilder]: Removed 8 assume(true) statements. [2024-12-02 09:02:06,556 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 09:02:06 BoogieIcfgContainer [2024-12-02 09:02:06,556 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-12-02 09:02:06,558 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-12-02 09:02:06,558 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-12-02 09:02:06,562 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-12-02 09:02:06,562 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 09:02:05" (1/3) ... [2024-12-02 09:02:06,563 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bd4698c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 09:02:06, skipping insertion in model container [2024-12-02 09:02:06,563 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 09:02:05" (2/3) ... [2024-12-02 09:02:06,563 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bd4698c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 09:02:06, skipping insertion in model container [2024-12-02 09:02:06,563 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 09:02:06" (3/3) ... [2024-12-02 09:02:06,564 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-bad-commit-2.wvr-bad.c [2024-12-02 09:02:06,579 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-12-02 09:02:06,581 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-bad-commit-2.wvr-bad.c that has 5 procedures, 99 locations, 1 initial locations, 8 loop locations, and 34 error locations. [2024-12-02 09:02:06,581 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-12-02 09:02:06,661 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-12-02 09:02:06,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 111 places, 122 transitions, 272 flow [2024-12-02 09:02:06,741 INFO L124 PetriNetUnfolderBase]: 24/118 cut-off events. [2024-12-02 09:02:06,743 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-12-02 09:02:06,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135 conditions, 118 events. 24/118 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 398 event pairs, 0 based on Foata normal form. 0/60 useless extension candidates. Maximal degree in co-relation 98. Up to 8 conditions per place. [2024-12-02 09:02:06,747 INFO L82 GeneralOperation]: Start removeDead. Operand has 111 places, 122 transitions, 272 flow [2024-12-02 09:02:06,752 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 106 places, 117 transitions, 258 flow [2024-12-02 09:02:06,759 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-12-02 09:02:06,784 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;@50775852, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-12-02 09:02:06,784 INFO L334 AbstractCegarLoop]: Starting to check reachability of 62 error locations. [2024-12-02 09:02:06,788 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-12-02 09:02:06,788 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-12-02 09:02:06,789 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-12-02 09:02:06,789 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 09:02:06,789 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-12-02 09:02:06,789 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-12-02 09:02:06,794 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 09:02:06,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1382589, now seen corresponding path program 1 times [2024-12-02 09:02:06,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 09:02:06,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796615809] [2024-12-02 09:02:06,802 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 09:02:06,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 09:02:06,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 09:02:07,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 09:02:07,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 09:02:07,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796615809] [2024-12-02 09:02:07,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796615809] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 09:02:07,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 09:02:07,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 09:02:07,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973157900] [2024-12-02 09:02:07,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 09:02:07,121 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 09:02:07,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 09:02:07,145 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 09:02:07,146 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-12-02 09:02:07,182 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 122 [2024-12-02 09:02:07,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 117 transitions, 258 flow. Second operand has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 09:02:07,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 09:02:07,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 122 [2024-12-02 09:02:07,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 09:02:17,488 INFO L124 PetriNetUnfolderBase]: 118658/157187 cut-off events. [2024-12-02 09:02:17,488 INFO L125 PetriNetUnfolderBase]: For 3382/3382 co-relation queries the response was YES. [2024-12-02 09:02:17,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 305211 conditions, 157187 events. 118658/157187 cut-off events. For 3382/3382 co-relation queries the response was YES. Maximal size of possible extension queue 12294. Compared 1180972 event pairs, 87208 based on Foata normal form. 1/82086 useless extension candidates. Maximal degree in co-relation 297468. Up to 144091 conditions per place. [2024-12-02 09:02:18,293 INFO L140 encePairwiseOnDemand]: 111/122 looper letters, 76 selfloop transitions, 2 changer transitions 0/107 dead transitions. [2024-12-02 09:02:18,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 107 transitions, 394 flow [2024-12-02 09:02:18,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 09:02:18,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 09:02:18,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 189 transitions. [2024-12-02 09:02:18,304 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5163934426229508 [2024-12-02 09:02:18,305 INFO L175 Difference]: Start difference. First operand has 106 places, 117 transitions, 258 flow. Second operand 3 states and 189 transitions. [2024-12-02 09:02:18,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 107 transitions, 394 flow [2024-12-02 09:02:18,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 107 transitions, 378 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-12-02 09:02:18,663 INFO L231 Difference]: Finished difference. Result has 94 places, 107 transitions, 226 flow [2024-12-02 09:02:18,665 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=226, PETRI_PLACES=94, PETRI_TRANSITIONS=107} [2024-12-02 09:02:18,667 INFO L279 CegarLoopForPetriNet]: 106 programPoint places, -12 predicate places. [2024-12-02 09:02:18,668 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 107 transitions, 226 flow [2024-12-02 09:02:18,668 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 09:02:18,668 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 09:02:18,668 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-12-02 09:02:18,668 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-12-02 09:02:18,668 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-12-02 09:02:18,669 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 09:02:18,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1382590, now seen corresponding path program 1 times [2024-12-02 09:02:18,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 09:02:18,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388112949] [2024-12-02 09:02:18,669 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 09:02:18,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 09:02:18,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 09:02:18,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 09:02:18,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 09:02:18,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388112949] [2024-12-02 09:02:18,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388112949] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 09:02:18,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 09:02:18,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 09:02:18,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105566084] [2024-12-02 09:02:18,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 09:02:18,873 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 09:02:18,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 09:02:18,873 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 09:02:18,873 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 09:02:18,904 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 122 [2024-12-02 09:02:18,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 107 transitions, 226 flow. Second operand has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 09:02:18,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 09:02:18,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 122 [2024-12-02 09:02:18,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 09:02:27,565 INFO L124 PetriNetUnfolderBase]: 118662/157199 cut-off events. [2024-12-02 09:02:27,565 INFO L125 PetriNetUnfolderBase]: For 585/585 co-relation queries the response was YES. [2024-12-02 09:02:27,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 302871 conditions, 157199 events. 118662/157199 cut-off events. For 585/585 co-relation queries the response was YES. Maximal size of possible extension queue 12294. Compared 1180139 event pairs, 87208 based on Foata normal form. 0/82091 useless extension candidates. Maximal degree in co-relation 302807. Up to 144108 conditions per place. [2024-12-02 09:02:28,169 INFO L140 encePairwiseOnDemand]: 105/122 looper letters, 81 selfloop transitions, 13 changer transitions 0/119 dead transitions. [2024-12-02 09:02:28,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 119 transitions, 440 flow [2024-12-02 09:02:28,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 09:02:28,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 09:02:28,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 234 transitions. [2024-12-02 09:02:28,171 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47950819672131145 [2024-12-02 09:02:28,172 INFO L175 Difference]: Start difference. First operand has 94 places, 107 transitions, 226 flow. Second operand 4 states and 234 transitions. [2024-12-02 09:02:28,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 119 transitions, 440 flow [2024-12-02 09:02:28,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 119 transitions, 434 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-02 09:02:28,176 INFO L231 Difference]: Finished difference. Result has 98 places, 119 transitions, 330 flow [2024-12-02 09:02:28,177 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=330, PETRI_PLACES=98, PETRI_TRANSITIONS=119} [2024-12-02 09:02:28,177 INFO L279 CegarLoopForPetriNet]: 106 programPoint places, -8 predicate places. [2024-12-02 09:02:28,177 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 119 transitions, 330 flow [2024-12-02 09:02:28,177 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 09:02:28,177 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 09:02:28,178 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-12-02 09:02:28,178 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-12-02 09:02:28,178 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-12-02 09:02:28,178 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 09:02:28,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1328713868, now seen corresponding path program 1 times [2024-12-02 09:02:28,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 09:02:28,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512308912] [2024-12-02 09:02:28,179 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 09:02:28,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 09:02:28,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 09:02:28,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 09:02:28,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 09:02:28,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512308912] [2024-12-02 09:02:28,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512308912] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 09:02:28,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424431728] [2024-12-02 09:02:28,405 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 09:02:28,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 09:02:28,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157d567c-29b3-4a8e-80c0-01c01e94d918/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 09:02:28,407 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157d567c-29b3-4a8e-80c0-01c01e94d918/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 09:02:28,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157d567c-29b3-4a8e-80c0-01c01e94d918/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-12-02 09:02:28,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 09:02:28,488 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-12-02 09:02:28,491 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 09:02:28,536 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-12-02 09:02:28,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 09:02:28,738 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 09:02:28,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 09:02:28,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424431728] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 09:02:28,857 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 09:02:28,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-12-02 09:02:28,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338749731] [2024-12-02 09:02:28,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 09:02:28,857 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-12-02 09:02:28,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 09:02:28,858 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-12-02 09:02:28,858 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-12-02 09:02:29,015 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 122 [2024-12-02 09:02:29,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 119 transitions, 330 flow. Second operand has 11 states, 11 states have (on average 35.36363636363637) internal successors, (389), 11 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 09:02:29,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 09:02:29,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 122 [2024-12-02 09:02:29,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 09:02:38,866 INFO L124 PetriNetUnfolderBase]: 118662/157195 cut-off events. [2024-12-02 09:02:38,866 INFO L125 PetriNetUnfolderBase]: For 588/588 co-relation queries the response was YES. [2024-12-02 09:02:39,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 302900 conditions, 157195 events. 118662/157195 cut-off events. For 588/588 co-relation queries the response was YES. Maximal size of possible extension queue 12294. Compared 1179846 event pairs, 87208 based on Foata normal form. 0/82096 useless extension candidates. Maximal degree in co-relation 302824. Up to 144092 conditions per place. [2024-12-02 09:02:39,593 INFO L140 encePairwiseOnDemand]: 105/122 looper letters, 68 selfloop transitions, 22 changer transitions 0/115 dead transitions. [2024-12-02 09:02:39,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 115 transitions, 494 flow [2024-12-02 09:02:39,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 09:02:39,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-12-02 09:02:39,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 298 transitions. [2024-12-02 09:02:39,595 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.40710382513661203 [2024-12-02 09:02:39,596 INFO L175 Difference]: Start difference. First operand has 98 places, 119 transitions, 330 flow. Second operand 6 states and 298 transitions. [2024-12-02 09:02:39,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 115 transitions, 494 flow [2024-12-02 09:02:39,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 115 transitions, 494 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-12-02 09:02:39,598 INFO L231 Difference]: Finished difference. Result has 99 places, 115 transitions, 358 flow [2024-12-02 09:02:39,599 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=358, PETRI_PLACES=99, PETRI_TRANSITIONS=115} [2024-12-02 09:02:39,599 INFO L279 CegarLoopForPetriNet]: 106 programPoint places, -7 predicate places. [2024-12-02 09:02:39,599 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 115 transitions, 358 flow [2024-12-02 09:02:39,600 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 35.36363636363637) internal successors, (389), 11 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 09:02:39,600 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 09:02:39,600 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 09:02:39,607 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157d567c-29b3-4a8e-80c0-01c01e94d918/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-12-02 09:02:39,800 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157d567c-29b3-4a8e-80c0-01c01e94d918/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 09:02:39,800 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-12-02 09:02:39,801 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 09:02:39,801 INFO L85 PathProgramCache]: Analyzing trace with hash 537591317, now seen corresponding path program 1 times [2024-12-02 09:02:39,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 09:02:39,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761078709] [2024-12-02 09:02:39,801 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 09:02:39,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 09:02:39,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 09:02:39,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 09:02:39,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 09:02:39,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761078709] [2024-12-02 09:02:39,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761078709] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 09:02:39,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 09:02:39,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-12-02 09:02:39,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098201532] [2024-12-02 09:02:39,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 09:02:39,896 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 09:02:39,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 09:02:39,896 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 09:02:39,896 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 09:02:39,897 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 122 [2024-12-02 09:02:39,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 115 transitions, 358 flow. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 09:02:39,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 09:02:39,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 122 [2024-12-02 09:02:39,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 09:02:55,043 INFO L124 PetriNetUnfolderBase]: 194070/257104 cut-off events. [2024-12-02 09:02:55,043 INFO L125 PetriNetUnfolderBase]: For 1414/1414 co-relation queries the response was YES. [2024-12-02 09:02:55,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 496160 conditions, 257104 events. 194070/257104 cut-off events. For 1414/1414 co-relation queries the response was YES. Maximal size of possible extension queue 17190. Compared 1972060 event pairs, 65266 based on Foata normal form. 4882/141949 useless extension candidates. Maximal degree in co-relation 496063. Up to 150037 conditions per place. [2024-12-02 09:02:56,134 INFO L140 encePairwiseOnDemand]: 109/122 looper letters, 139 selfloop transitions, 4 changer transitions 0/168 dead transitions. [2024-12-02 09:02:56,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 168 transitions, 756 flow [2024-12-02 09:02:56,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 09:02:56,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 09:02:56,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 254 transitions. [2024-12-02 09:02:56,135 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6939890710382514 [2024-12-02 09:02:56,135 INFO L175 Difference]: Start difference. First operand has 99 places, 115 transitions, 358 flow. Second operand 3 states and 254 transitions. [2024-12-02 09:02:56,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 168 transitions, 756 flow [2024-12-02 09:02:56,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 168 transitions, 692 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-12-02 09:02:56,138 INFO L231 Difference]: Finished difference. Result has 96 places, 118 transitions, 336 flow [2024-12-02 09:02:56,139 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=336, PETRI_PLACES=96, PETRI_TRANSITIONS=118} [2024-12-02 09:02:56,139 INFO L279 CegarLoopForPetriNet]: 106 programPoint places, -10 predicate places. [2024-12-02 09:02:56,140 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 118 transitions, 336 flow [2024-12-02 09:02:56,140 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 09:02:56,140 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 09:02:56,140 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 09:02:56,140 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-12-02 09:02:56,140 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-12-02 09:02:56,141 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 09:02:56,141 INFO L85 PathProgramCache]: Analyzing trace with hash -514535830, now seen corresponding path program 1 times [2024-12-02 09:02:56,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 09:02:56,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653492832] [2024-12-02 09:02:56,141 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 09:02:56,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 09:02:56,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 09:02:56,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 09:02:56,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 09:02:56,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653492832] [2024-12-02 09:02:56,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653492832] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 09:02:56,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 09:02:56,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 09:02:56,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668777666] [2024-12-02 09:02:56,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 09:02:56,188 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 09:02:56,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 09:02:56,188 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 09:02:56,188 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 09:02:56,205 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 122 [2024-12-02 09:02:56,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 118 transitions, 336 flow. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 09:02:56,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 09:02:56,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 122 [2024-12-02 09:02:56,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 09:03:11,712 INFO L124 PetriNetUnfolderBase]: 233534/306661 cut-off events. [2024-12-02 09:03:11,712 INFO L125 PetriNetUnfolderBase]: For 18098/18473 co-relation queries the response was YES. [2024-12-02 09:03:12,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 636592 conditions, 306661 events. 233534/306661 cut-off events. For 18098/18473 co-relation queries the response was YES. Maximal size of possible extension queue 9786. Compared 2160396 event pairs, 72876 based on Foata normal form. 0/198039 useless extension candidates. Maximal degree in co-relation 95513. Up to 173521 conditions per place. [2024-12-02 09:03:12,826 INFO L140 encePairwiseOnDemand]: 117/122 looper letters, 141 selfloop transitions, 4 changer transitions 0/163 dead transitions. [2024-12-02 09:03:12,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 163 transitions, 728 flow [2024-12-02 09:03:12,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 09:03:12,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 09:03:12,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 224 transitions. [2024-12-02 09:03:12,828 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6120218579234973 [2024-12-02 09:03:12,828 INFO L175 Difference]: Start difference. First operand has 96 places, 118 transitions, 336 flow. Second operand 3 states and 224 transitions. [2024-12-02 09:03:12,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 163 transitions, 728 flow [2024-12-02 09:03:12,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 163 transitions, 724 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-12-02 09:03:12,834 INFO L231 Difference]: Finished difference. Result has 99 places, 119 transitions, 354 flow [2024-12-02 09:03:12,834 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=354, PETRI_PLACES=99, PETRI_TRANSITIONS=119} [2024-12-02 09:03:12,835 INFO L279 CegarLoopForPetriNet]: 106 programPoint places, -7 predicate places. [2024-12-02 09:03:12,835 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 119 transitions, 354 flow [2024-12-02 09:03:12,835 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 09:03:12,835 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 09:03:12,835 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 09:03:12,835 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-12-02 09:03:12,836 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-12-02 09:03:12,836 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 09:03:12,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1846990509, now seen corresponding path program 1 times [2024-12-02 09:03:12,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 09:03:12,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89147820] [2024-12-02 09:03:12,836 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 09:03:12,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 09:03:12,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 09:03:12,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 09:03:12,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 09:03:12,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89147820] [2024-12-02 09:03:12,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89147820] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 09:03:12,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 09:03:12,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 09:03:12,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572102202] [2024-12-02 09:03:12,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 09:03:12,903 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 09:03:12,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 09:03:12,903 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 09:03:12,903 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 09:03:12,903 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 122 [2024-12-02 09:03:12,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 119 transitions, 354 flow. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 09:03:12,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 09:03:12,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 122 [2024-12-02 09:03:12,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand