./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6497de01 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd8e65e-7891-475f-af60-a0300448d609/bin/uautomizer-verify-LYvppIcaGC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd8e65e-7891-475f-af60-a0300448d609/bin/uautomizer-verify-LYvppIcaGC/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd8e65e-7891-475f-af60-a0300448d609/bin/uautomizer-verify-LYvppIcaGC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd8e65e-7891-475f-af60-a0300448d609/bin/uautomizer-verify-LYvppIcaGC/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd8e65e-7891-475f-af60-a0300448d609/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd8e65e-7891-475f-af60-a0300448d609/bin/uautomizer-verify-LYvppIcaGC --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 83c7202603a0719c5812e4d7043f4665de4d954c89c656bd6312ac9e8fdcb494 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-6497de0 [2024-11-23 23:00:29,738 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-23 23:00:29,876 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd8e65e-7891-475f-af60-a0300448d609/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-23 23:00:29,883 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-23 23:00:29,883 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-23 23:00:29,931 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-23 23:00:29,932 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-23 23:00:29,932 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-23 23:00:29,933 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-23 23:00:29,933 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-23 23:00:29,934 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-23 23:00:29,935 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-23 23:00:29,936 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-23 23:00:29,936 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-23 23:00:29,936 INFO L153 SettingsManager]: * Use SBE=true [2024-11-23 23:00:29,936 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-23 23:00:29,936 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-23 23:00:29,936 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-23 23:00:29,937 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-23 23:00:29,937 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-23 23:00:29,937 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-23 23:00:29,937 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-23 23:00:29,937 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-23 23:00:29,937 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-23 23:00:29,937 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-23 23:00:29,937 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-23 23:00:29,937 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-23 23:00:29,937 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-23 23:00:29,938 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-23 23:00:29,938 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-23 23:00:29,938 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 23:00:29,938 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 23:00:29,938 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 23:00:29,938 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 23:00:29,938 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-23 23:00:29,938 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 23:00:29,938 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 23:00:29,939 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 23:00:29,941 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 23:00:29,941 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-23 23:00:29,941 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-23 23:00:29,941 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-23 23:00:29,942 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-23 23:00:29,942 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-23 23:00:29,942 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-23 23:00:29,943 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-23 23:00:29,943 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-23 23:00:29,943 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_3fd8e65e-7891-475f-af60-a0300448d609/bin/uautomizer-verify-LYvppIcaGC 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 -> 83c7202603a0719c5812e4d7043f4665de4d954c89c656bd6312ac9e8fdcb494 [2024-11-23 23:00:30,347 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-23 23:00:30,356 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-23 23:00:30,358 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-23 23:00:30,360 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-23 23:00:30,360 INFO L274 PluginConnector]: CDTParser initialized [2024-11-23 23:00:30,362 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd8e65e-7891-475f-af60-a0300448d609/bin/uautomizer-verify-LYvppIcaGC/../../sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c [2024-11-23 23:00:33,971 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd8e65e-7891-475f-af60-a0300448d609/bin/uautomizer-verify-LYvppIcaGC/data/42df48090/cc4bc4645730455297a5979c1fab5d16/FLAGbd6420c5a [2024-11-23 23:00:34,329 INFO L384 CDTParser]: Found 1 translation units. [2024-11-23 23:00:34,330 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd8e65e-7891-475f-af60-a0300448d609/sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c [2024-11-23 23:00:34,352 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd8e65e-7891-475f-af60-a0300448d609/bin/uautomizer-verify-LYvppIcaGC/data/42df48090/cc4bc4645730455297a5979c1fab5d16/FLAGbd6420c5a [2024-11-23 23:00:34,560 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd8e65e-7891-475f-af60-a0300448d609/bin/uautomizer-verify-LYvppIcaGC/data/42df48090/cc4bc4645730455297a5979c1fab5d16 [2024-11-23 23:00:34,564 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-23 23:00:34,567 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-23 23:00:34,569 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-23 23:00:34,569 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-23 23:00:34,577 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-23 23:00:34,581 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:00:34" (1/1) ... [2024-11-23 23:00:34,583 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a179bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:00:34, skipping insertion in model container [2024-11-23 23:00:34,583 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:00:34" (1/1) ... [2024-11-23 23:00:34,613 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-23 23:00:34,870 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-23 23:00:34,873 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 23:00:34,885 INFO L200 MainTranslator]: Completed pre-run [2024-11-23 23:00:34,922 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 23:00:34,942 INFO L204 MainTranslator]: Completed translation [2024-11-23 23:00:34,943 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:00:34 WrapperNode [2024-11-23 23:00:34,943 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-23 23:00:34,944 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-23 23:00:34,944 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-23 23:00:34,945 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-23 23:00:34,953 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:00:34" (1/1) ... [2024-11-23 23:00:34,964 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:00:34" (1/1) ... [2024-11-23 23:00:35,025 INFO L138 Inliner]: procedures = 24, calls = 54, calls flagged for inlining = 21, calls inlined = 25, statements flattened = 333 [2024-11-23 23:00:35,025 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-23 23:00:35,026 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-23 23:00:35,026 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-23 23:00:35,026 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-23 23:00:35,045 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:00:34" (1/1) ... [2024-11-23 23:00:35,045 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:00:34" (1/1) ... [2024-11-23 23:00:35,054 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:00:34" (1/1) ... [2024-11-23 23:00:35,094 INFO L175 MemorySlicer]: Split 13 memory accesses to 2 slices as follows [2, 11]. 85 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-11-23 23:00:35,094 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:00:34" (1/1) ... [2024-11-23 23:00:35,094 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:00:34" (1/1) ... [2024-11-23 23:00:35,114 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:00:34" (1/1) ... [2024-11-23 23:00:35,120 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:00:34" (1/1) ... [2024-11-23 23:00:35,130 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:00:34" (1/1) ... [2024-11-23 23:00:35,136 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:00:34" (1/1) ... [2024-11-23 23:00:35,137 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:00:34" (1/1) ... [2024-11-23 23:00:35,145 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-23 23:00:35,149 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-23 23:00:35,150 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-23 23:00:35,150 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-23 23:00:35,151 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:00:34" (1/1) ... [2024-11-23 23:00:35,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 23:00:35,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd8e65e-7891-475f-af60-a0300448d609/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:00:35,192 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd8e65e-7891-475f-af60-a0300448d609/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-23 23:00:35,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd8e65e-7891-475f-af60-a0300448d609/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-23 23:00:35,233 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-23 23:00:35,238 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-23 23:00:35,238 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-23 23:00:35,238 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-23 23:00:35,238 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-23 23:00:35,238 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-23 23:00:35,238 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-23 23:00:35,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-23 23:00:35,239 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-23 23:00:35,239 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-23 23:00:35,239 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-23 23:00:35,239 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-23 23:00:35,239 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-23 23:00:35,239 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-23 23:00:35,239 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-23 23:00:35,239 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-23 23:00:35,239 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-23 23:00:35,239 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-23 23:00:35,241 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-23 23:00:35,410 INFO L234 CfgBuilder]: Building ICFG [2024-11-23 23:00:35,413 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-23 23:00:36,401 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-23 23:00:36,401 INFO L283 CfgBuilder]: Performing block encoding [2024-11-23 23:00:37,157 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-23 23:00:37,158 INFO L312 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-23 23:00:37,158 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:00:37 BoogieIcfgContainer [2024-11-23 23:00:37,158 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-23 23:00:37,161 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-23 23:00:37,161 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-23 23:00:37,168 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-23 23:00:37,168 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:00:34" (1/3) ... [2024-11-23 23:00:37,169 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e25357 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:00:37, skipping insertion in model container [2024-11-23 23:00:37,169 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:00:34" (2/3) ... [2024-11-23 23:00:37,170 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e25357 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:00:37, skipping insertion in model container [2024-11-23 23:00:37,170 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:00:37" (3/3) ... [2024-11-23 23:00:37,171 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-bad-commit-1.wvr-bad.c [2024-11-23 23:00:37,191 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-23 23:00:37,193 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-bad-commit-1.wvr-bad.c that has 4 procedures, 72 locations, 1 initial locations, 6 loop locations, and 24 error locations. [2024-11-23 23:00:37,193 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-23 23:00:37,371 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-23 23:00:37,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 88 transitions, 197 flow [2024-11-23 23:00:37,507 INFO L124 PetriNetUnfolderBase]: 17/85 cut-off events. [2024-11-23 23:00:37,511 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-23 23:00:37,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98 conditions, 85 events. 17/85 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 243 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 64. Up to 6 conditions per place. [2024-11-23 23:00:37,521 INFO L82 GeneralOperation]: Start removeDead. Operand has 81 places, 88 transitions, 197 flow [2024-11-23 23:00:37,527 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 77 places, 84 transitions, 186 flow [2024-11-23 23:00:37,544 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-23 23:00:37,569 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;@972e778, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-23 23:00:37,569 INFO L334 AbstractCegarLoop]: Starting to check reachability of 43 error locations. [2024-11-23 23:00:37,575 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-23 23:00:37,575 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-23 23:00:37,575 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-23 23:00:37,575 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:00:37,576 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-23 23:00:37,577 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-23 23:00:37,585 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:00:37,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1044581, now seen corresponding path program 1 times [2024-11-23 23:00:37,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:00:37,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370342382] [2024-11-23 23:00:37,597 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:00:37,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:00:37,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:00:37,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:00:37,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:00:37,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370342382] [2024-11-23 23:00:37,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370342382] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:00:37,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:00:37,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-23 23:00:38,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667755988] [2024-11-23 23:00:38,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:00:38,013 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 23:00:38,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:00:38,051 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 23:00:38,052 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 23:00:38,081 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 88 [2024-11-23 23:00:38,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 84 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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) [2024-11-23 23:00:38,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:00:38,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 88 [2024-11-23 23:00:38,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:00:40,465 INFO L124 PetriNetUnfolderBase]: 7269/10578 cut-off events. [2024-11-23 23:00:40,466 INFO L125 PetriNetUnfolderBase]: For 354/354 co-relation queries the response was YES. [2024-11-23 23:00:40,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20394 conditions, 10578 events. 7269/10578 cut-off events. For 354/354 co-relation queries the response was YES. Maximal size of possible extension queue 1009. Compared 70300 event pairs, 5236 based on Foata normal form. 1/5672 useless extension candidates. Maximal degree in co-relation 19706. Up to 9450 conditions per place. [2024-11-23 23:00:40,582 INFO L140 encePairwiseOnDemand]: 79/88 looper letters, 54 selfloop transitions, 2 changer transitions 0/76 dead transitions. [2024-11-23 23:00:40,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 76 transitions, 282 flow [2024-11-23 23:00:40,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 23:00:40,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-23 23:00:40,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 135 transitions. [2024-11-23 23:00:40,607 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5113636363636364 [2024-11-23 23:00:40,609 INFO L175 Difference]: Start difference. First operand has 77 places, 84 transitions, 186 flow. Second operand 3 states and 135 transitions. [2024-11-23 23:00:40,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 76 transitions, 282 flow [2024-11-23 23:00:40,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 76 transitions, 270 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-23 23:00:40,635 INFO L231 Difference]: Finished difference. Result has 68 places, 76 transitions, 162 flow [2024-11-23 23:00:40,640 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=162, PETRI_PLACES=68, PETRI_TRANSITIONS=76} [2024-11-23 23:00:40,646 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, -9 predicate places. [2024-11-23 23:00:40,648 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 76 transitions, 162 flow [2024-11-23 23:00:40,648 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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) [2024-11-23 23:00:40,648 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:00:40,649 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-23 23:00:40,649 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-23 23:00:40,650 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-23 23:00:40,650 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:00:40,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1044582, now seen corresponding path program 1 times [2024-11-23 23:00:40,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:00:40,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396965032] [2024-11-23 23:00:40,652 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:00:40,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:00:40,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:00:41,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:00:41,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:00:41,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396965032] [2024-11-23 23:00:41,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396965032] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:00:41,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:00:41,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 23:00:41,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357572774] [2024-11-23 23:00:41,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:00:41,206 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 23:00:41,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:00:41,207 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 23:00:41,208 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 23:00:41,239 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 88 [2024-11-23 23:00:41,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 76 transitions, 162 flow. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 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) [2024-11-23 23:00:41,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:00:41,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 88 [2024-11-23 23:00:41,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:00:42,990 INFO L124 PetriNetUnfolderBase]: 7269/10575 cut-off events. [2024-11-23 23:00:42,990 INFO L125 PetriNetUnfolderBase]: For 73/73 co-relation queries the response was YES. [2024-11-23 23:00:43,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20169 conditions, 10575 events. 7269/10575 cut-off events. For 73/73 co-relation queries the response was YES. Maximal size of possible extension queue 1009. Compared 70240 event pairs, 5236 based on Foata normal form. 0/5669 useless extension candidates. Maximal degree in co-relation 20144. Up to 9450 conditions per place. [2024-11-23 23:00:43,110 INFO L140 encePairwiseOnDemand]: 77/88 looper letters, 48 selfloop transitions, 8 changer transitions 0/73 dead transitions. [2024-11-23 23:00:43,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 73 transitions, 268 flow [2024-11-23 23:00:43,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 23:00:43,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 23:00:43,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 155 transitions. [2024-11-23 23:00:43,114 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4403409090909091 [2024-11-23 23:00:43,115 INFO L175 Difference]: Start difference. First operand has 68 places, 76 transitions, 162 flow. Second operand 4 states and 155 transitions. [2024-11-23 23:00:43,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 73 transitions, 268 flow [2024-11-23 23:00:43,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 73 transitions, 264 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-23 23:00:43,119 INFO L231 Difference]: Finished difference. Result has 66 places, 73 transitions, 168 flow [2024-11-23 23:00:43,120 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=168, PETRI_PLACES=66, PETRI_TRANSITIONS=73} [2024-11-23 23:00:43,122 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, -11 predicate places. [2024-11-23 23:00:43,122 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 73 transitions, 168 flow [2024-11-23 23:00:43,122 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 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) [2024-11-23 23:00:43,123 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:00:43,123 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:00:43,124 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-23 23:00:43,124 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-23 23:00:43,125 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:00:43,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1757299587, now seen corresponding path program 1 times [2024-11-23 23:00:43,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:00:43,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557158] [2024-11-23 23:00:43,127 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:00:43,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:00:43,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:00:43,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:00:43,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:00:43,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557158] [2024-11-23 23:00:43,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557158] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:00:43,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:00:43,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-23 23:00:43,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138816749] [2024-11-23 23:00:43,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:00:43,336 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 23:00:43,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:00:43,337 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 23:00:43,337 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 23:00:43,337 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 88 [2024-11-23 23:00:43,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 73 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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) [2024-11-23 23:00:43,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:00:43,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 88 [2024-11-23 23:00:43,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:00:45,632 INFO L124 PetriNetUnfolderBase]: 12116/17661 cut-off events. [2024-11-23 23:00:45,632 INFO L125 PetriNetUnfolderBase]: For 163/163 co-relation queries the response was YES. [2024-11-23 23:00:45,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33711 conditions, 17661 events. 12116/17661 cut-off events. For 163/163 co-relation queries the response was YES. Maximal size of possible extension queue 1365. Compared 122542 event pairs, 4256 based on Foata normal form. 350/10091 useless extension candidates. Maximal degree in co-relation 33680. Up to 9751 conditions per place. [2024-11-23 23:00:45,738 INFO L140 encePairwiseOnDemand]: 79/88 looper letters, 90 selfloop transitions, 3 changer transitions 0/110 dead transitions. [2024-11-23 23:00:45,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 110 transitions, 432 flow [2024-11-23 23:00:45,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 23:00:45,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-23 23:00:45,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 180 transitions. [2024-11-23 23:00:45,740 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6818181818181818 [2024-11-23 23:00:45,741 INFO L175 Difference]: Start difference. First operand has 66 places, 73 transitions, 168 flow. Second operand 3 states and 180 transitions. [2024-11-23 23:00:45,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 110 transitions, 432 flow [2024-11-23 23:00:45,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 110 transitions, 416 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-23 23:00:45,747 INFO L231 Difference]: Finished difference. Result has 66 places, 75 transitions, 181 flow [2024-11-23 23:00:45,747 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=181, PETRI_PLACES=66, PETRI_TRANSITIONS=75} [2024-11-23 23:00:45,748 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, -11 predicate places. [2024-11-23 23:00:45,749 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 75 transitions, 181 flow [2024-11-23 23:00:45,749 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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) [2024-11-23 23:00:45,749 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:00:45,750 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:00:45,750 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-23 23:00:45,750 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-23 23:00:45,751 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:00:45,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1358289779, now seen corresponding path program 1 times [2024-11-23 23:00:45,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:00:45,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709870616] [2024-11-23 23:00:45,752 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:00:45,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:00:45,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:00:45,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:00:45,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:00:45,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709870616] [2024-11-23 23:00:45,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709870616] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:00:45,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:00:45,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 23:00:45,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253725885] [2024-11-23 23:00:45,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:00:45,871 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 23:00:45,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:00:45,872 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 23:00:45,873 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 23:00:45,890 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 88 [2024-11-23 23:00:45,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 75 transitions, 181 flow. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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) [2024-11-23 23:00:45,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:00:45,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 88 [2024-11-23 23:00:45,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:00:48,468 INFO L124 PetriNetUnfolderBase]: 15261/21877 cut-off events. [2024-11-23 23:00:48,468 INFO L125 PetriNetUnfolderBase]: For 1277/1301 co-relation queries the response was YES. [2024-11-23 23:00:48,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44986 conditions, 21877 events. 15261/21877 cut-off events. For 1277/1301 co-relation queries the response was YES. Maximal size of possible extension queue 876. Compared 138855 event pairs, 5655 based on Foata normal form. 0/14448 useless extension candidates. Maximal degree in co-relation 10198. Up to 10528 conditions per place. [2024-11-23 23:00:48,623 INFO L140 encePairwiseOnDemand]: 83/88 looper letters, 91 selfloop transitions, 4 changer transitions 0/107 dead transitions. [2024-11-23 23:00:48,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 107 transitions, 443 flow [2024-11-23 23:00:48,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 23:00:48,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-23 23:00:48,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 160 transitions. [2024-11-23 23:00:48,628 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6060606060606061 [2024-11-23 23:00:48,628 INFO L175 Difference]: Start difference. First operand has 66 places, 75 transitions, 181 flow. Second operand 3 states and 160 transitions. [2024-11-23 23:00:48,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 107 transitions, 443 flow [2024-11-23 23:00:48,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 107 transitions, 440 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-23 23:00:48,634 INFO L231 Difference]: Finished difference. Result has 69 places, 76 transitions, 200 flow [2024-11-23 23:00:48,635 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=200, PETRI_PLACES=69, PETRI_TRANSITIONS=76} [2024-11-23 23:00:48,636 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, -8 predicate places. [2024-11-23 23:00:48,637 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 76 transitions, 200 flow [2024-11-23 23:00:48,638 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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) [2024-11-23 23:00:48,638 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:00:48,638 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:00:48,638 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-23 23:00:48,639 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-23 23:00:48,639 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:00:48,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1039731882, now seen corresponding path program 1 times [2024-11-23 23:00:48,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:00:48,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809798531] [2024-11-23 23:00:48,641 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:00:48,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:00:48,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:00:48,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:00:48,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:00:48,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809798531] [2024-11-23 23:00:48,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809798531] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:00:48,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:00:48,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 23:00:48,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233091370] [2024-11-23 23:00:48,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:00:48,827 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 23:00:48,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:00:48,828 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 23:00:48,828 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 23:00:48,828 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 88 [2024-11-23 23:00:48,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 76 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 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) [2024-11-23 23:00:48,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:00:48,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 88 [2024-11-23 23:00:48,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:00:51,356 INFO L124 PetriNetUnfolderBase]: 19159/28505 cut-off events. [2024-11-23 23:00:51,356 INFO L125 PetriNetUnfolderBase]: For 4681/4845 co-relation queries the response was YES. [2024-11-23 23:00:51,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60737 conditions, 28505 events. 19159/28505 cut-off events. For 4681/4845 co-relation queries the response was YES. Maximal size of possible extension queue 1046. Compared 195569 event pairs, 7868 based on Foata normal form. 477/19441 useless extension candidates. Maximal degree in co-relation 17559. Up to 12927 conditions per place. [2024-11-23 23:00:51,515 INFO L140 encePairwiseOnDemand]: 83/88 looper letters, 96 selfloop transitions, 2 changer transitions 0/116 dead transitions. [2024-11-23 23:00:51,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 116 transitions, 504 flow [2024-11-23 23:00:51,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 23:00:51,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-23 23:00:51,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 180 transitions. [2024-11-23 23:00:51,517 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6818181818181818 [2024-11-23 23:00:51,517 INFO L175 Difference]: Start difference. First operand has 69 places, 76 transitions, 200 flow. Second operand 3 states and 180 transitions. [2024-11-23 23:00:51,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 116 transitions, 504 flow [2024-11-23 23:00:51,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 116 transitions, 492 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-23 23:00:51,529 INFO L231 Difference]: Finished difference. Result has 70 places, 77 transitions, 208 flow [2024-11-23 23:00:51,530 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=208, PETRI_PLACES=70, PETRI_TRANSITIONS=77} [2024-11-23 23:00:51,530 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, -7 predicate places. [2024-11-23 23:00:51,531 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 77 transitions, 208 flow [2024-11-23 23:00:51,531 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 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) [2024-11-23 23:00:51,531 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:00:51,531 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:00:51,531 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-23 23:00:51,532 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-23 23:00:51,532 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:00:51,532 INFO L85 PathProgramCache]: Analyzing trace with hash -2128047873, now seen corresponding path program 1 times [2024-11-23 23:00:51,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:00:51,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020165709] [2024-11-23 23:00:51,533 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:00:51,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:00:51,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:00:51,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:00:51,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:00:51,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020165709] [2024-11-23 23:00:51,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020165709] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:00:51,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:00:51,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 23:00:51,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683765129] [2024-11-23 23:00:51,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:00:51,622 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 23:00:51,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:00:51,623 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 23:00:51,623 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 23:00:51,635 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 88 [2024-11-23 23:00:51,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 77 transitions, 208 flow. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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) [2024-11-23 23:00:51,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:00:51,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 88 [2024-11-23 23:00:51,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:00:54,575 INFO L124 PetriNetUnfolderBase]: 23767/34263 cut-off events. [2024-11-23 23:00:54,575 INFO L125 PetriNetUnfolderBase]: For 4327/4741 co-relation queries the response was YES. [2024-11-23 23:00:54,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73027 conditions, 34263 events. 23767/34263 cut-off events. For 4327/4741 co-relation queries the response was YES. Maximal size of possible extension queue 1488. Compared 225786 event pairs, 11883 based on Foata normal form. 0/23383 useless extension candidates. Maximal degree in co-relation 25449. Up to 20195 conditions per place. [2024-11-23 23:00:54,740 INFO L140 encePairwiseOnDemand]: 83/88 looper letters, 93 selfloop transitions, 4 changer transitions 0/112 dead transitions. [2024-11-23 23:00:54,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 112 transitions, 493 flow [2024-11-23 23:00:54,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 23:00:54,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-23 23:00:54,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 168 transitions. [2024-11-23 23:00:54,742 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6363636363636364 [2024-11-23 23:00:54,742 INFO L175 Difference]: Start difference. First operand has 70 places, 77 transitions, 208 flow. Second operand 3 states and 168 transitions. [2024-11-23 23:00:54,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 112 transitions, 493 flow [2024-11-23 23:00:54,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 112 transitions, 491 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-23 23:00:54,748 INFO L231 Difference]: Finished difference. Result has 73 places, 77 transitions, 224 flow [2024-11-23 23:00:54,748 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=224, PETRI_PLACES=73, PETRI_TRANSITIONS=77} [2024-11-23 23:00:54,749 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, -4 predicate places. [2024-11-23 23:00:54,749 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 77 transitions, 224 flow [2024-11-23 23:00:54,749 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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) [2024-11-23 23:00:54,749 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:00:54,749 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:00:54,750 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-23 23:00:54,750 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-23 23:00:54,750 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:00:54,751 INFO L85 PathProgramCache]: Analyzing trace with hash 487673179, now seen corresponding path program 1 times [2024-11-23 23:00:54,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:00:54,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714992184] [2024-11-23 23:00:54,751 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:00:54,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:00:54,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:00:55,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:00:55,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:00:55,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714992184] [2024-11-23 23:00:55,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714992184] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:00:55,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:00:55,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 23:00:55,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970250971] [2024-11-23 23:00:55,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:00:55,130 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 23:00:55,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:00:55,131 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 23:00:55,131 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 23:00:55,148 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 88 [2024-11-23 23:00:55,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 77 transitions, 224 flow. Second operand has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 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) [2024-11-23 23:00:55,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:00:55,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 88 [2024-11-23 23:00:55,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:00:58,413 INFO L124 PetriNetUnfolderBase]: 21337/31717 cut-off events. [2024-11-23 23:00:58,413 INFO L125 PetriNetUnfolderBase]: For 9783/10485 co-relation queries the response was YES. [2024-11-23 23:00:58,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70146 conditions, 31717 events. 21337/31717 cut-off events. For 9783/10485 co-relation queries the response was YES. Maximal size of possible extension queue 1403. Compared 214056 event pairs, 16426 based on Foata normal form. 112/21798 useless extension candidates. Maximal degree in co-relation 42084. Up to 26815 conditions per place. [2024-11-23 23:00:58,535 INFO L140 encePairwiseOnDemand]: 76/88 looper letters, 87 selfloop transitions, 9 changer transitions 0/115 dead transitions. [2024-11-23 23:00:58,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 115 transitions, 498 flow [2024-11-23 23:00:58,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 23:00:58,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 23:00:58,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 232 transitions. [2024-11-23 23:00:58,537 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5272727272727272 [2024-11-23 23:00:58,537 INFO L175 Difference]: Start difference. First operand has 73 places, 77 transitions, 224 flow. Second operand 5 states and 232 transitions. [2024-11-23 23:00:58,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 115 transitions, 498 flow [2024-11-23 23:00:58,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 115 transitions, 490 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-23 23:00:58,554 INFO L231 Difference]: Finished difference. Result has 78 places, 85 transitions, 288 flow [2024-11-23 23:00:58,554 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=288, PETRI_PLACES=78, PETRI_TRANSITIONS=85} [2024-11-23 23:00:58,555 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 1 predicate places. [2024-11-23 23:00:58,555 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 85 transitions, 288 flow [2024-11-23 23:00:58,555 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 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) [2024-11-23 23:00:58,556 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:00:58,559 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:00:58,560 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-23 23:00:58,560 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-23 23:00:58,560 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:00:58,560 INFO L85 PathProgramCache]: Analyzing trace with hash -2061998497, now seen corresponding path program 1 times [2024-11-23 23:00:58,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:00:58,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452775138] [2024-11-23 23:00:58,561 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:00:58,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:00:58,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:00:58,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:00:58,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:00:58,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452775138] [2024-11-23 23:00:58,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452775138] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:00:58,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:00:58,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 23:00:58,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873209335] [2024-11-23 23:00:58,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:00:58,644 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 23:00:58,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:00:58,644 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 23:00:58,644 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 23:00:58,655 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 88 [2024-11-23 23:00:58,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 85 transitions, 288 flow. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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) [2024-11-23 23:00:58,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:00:58,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 88 [2024-11-23 23:00:58,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:01:03,561 INFO L124 PetriNetUnfolderBase]: 37217/53369 cut-off events. [2024-11-23 23:01:03,561 INFO L125 PetriNetUnfolderBase]: For 13027/14211 co-relation queries the response was YES. [2024-11-23 23:01:03,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119813 conditions, 53369 events. 37217/53369 cut-off events. For 13027/14211 co-relation queries the response was YES. Maximal size of possible extension queue 2230. Compared 357507 event pairs, 21948 based on Foata normal form. 0/36562 useless extension candidates. Maximal degree in co-relation 117440. Up to 24963 conditions per place. [2024-11-23 23:01:03,834 INFO L140 encePairwiseOnDemand]: 83/88 looper letters, 101 selfloop transitions, 5 changer transitions 0/122 dead transitions. [2024-11-23 23:01:03,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 122 transitions, 609 flow [2024-11-23 23:01:03,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 23:01:03,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-23 23:01:03,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 168 transitions. [2024-11-23 23:01:03,839 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6363636363636364 [2024-11-23 23:01:03,840 INFO L175 Difference]: Start difference. First operand has 78 places, 85 transitions, 288 flow. Second operand 3 states and 168 transitions. [2024-11-23 23:01:03,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 122 transitions, 609 flow [2024-11-23 23:01:03,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 122 transitions, 607 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-23 23:01:03,859 INFO L231 Difference]: Finished difference. Result has 81 places, 86 transitions, 312 flow [2024-11-23 23:01:03,860 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=312, PETRI_PLACES=81, PETRI_TRANSITIONS=86} [2024-11-23 23:01:03,865 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 4 predicate places. [2024-11-23 23:01:03,865 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 86 transitions, 312 flow [2024-11-23 23:01:03,865 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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) [2024-11-23 23:01:03,865 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:01:03,865 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:01:03,865 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-23 23:01:03,866 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-23 23:01:03,866 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:01:03,866 INFO L85 PathProgramCache]: Analyzing trace with hash 981408421, now seen corresponding path program 1 times [2024-11-23 23:01:03,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:01:03,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725363168] [2024-11-23 23:01:03,866 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:01:03,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:01:03,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:01:04,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:01:04,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:01:04,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725363168] [2024-11-23 23:01:04,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725363168] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:01:04,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351725017] [2024-11-23 23:01:04,779 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:01:04,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:01:04,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd8e65e-7891-475f-af60-a0300448d609/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:01:04,785 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd8e65e-7891-475f-af60-a0300448d609/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:01:04,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd8e65e-7891-475f-af60-a0300448d609/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-23 23:01:04,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:01:04,945 INFO L256 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-23 23:01:04,959 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:01:05,039 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 6 treesize of output 5 [2024-11-23 23:01:05,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-23 23:01:05,187 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-23 23:01:05,231 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-23 23:01:05,232 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-23 23:01:05,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-23 23:01:05,299 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-23 23:01:05,316 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-23 23:01:05,317 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-23 23:01:05,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:01:05,444 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:01:05,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351725017] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:01:05,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 23:01:05,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 9 [2024-11-23 23:01:05,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199630744] [2024-11-23 23:01:05,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:01:05,446 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-23 23:01:05,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:01:05,448 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-23 23:01:05,448 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-23 23:01:05,502 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 88 [2024-11-23 23:01:05,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 86 transitions, 312 flow. Second operand has 6 states, 6 states have (on average 26.333333333333332) internal successors, (158), 6 states have internal predecessors, (158), 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) [2024-11-23 23:01:05,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:01:05,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 88 [2024-11-23 23:01:05,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:01:08,529 INFO L124 PetriNetUnfolderBase]: 18923/28899 cut-off events. [2024-11-23 23:01:08,530 INFO L125 PetriNetUnfolderBase]: For 11963/13211 co-relation queries the response was YES. [2024-11-23 23:01:08,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64365 conditions, 28899 events. 18923/28899 cut-off events. For 11963/13211 co-relation queries the response was YES. Maximal size of possible extension queue 1023. Compared 197566 event pairs, 14916 based on Foata normal form. 1455/22710 useless extension candidates. Maximal degree in co-relation 62224. Up to 25014 conditions per place. [2024-11-23 23:01:08,645 INFO L140 encePairwiseOnDemand]: 78/88 looper letters, 55 selfloop transitions, 3 changer transitions 0/78 dead transitions. [2024-11-23 23:01:08,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 78 transitions, 400 flow [2024-11-23 23:01:08,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 23:01:08,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 23:01:08,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 152 transitions. [2024-11-23 23:01:08,647 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-11-23 23:01:08,647 INFO L175 Difference]: Start difference. First operand has 81 places, 86 transitions, 312 flow. Second operand 4 states and 152 transitions. [2024-11-23 23:01:08,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 78 transitions, 400 flow [2024-11-23 23:01:08,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 78 transitions, 390 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-23 23:01:08,655 INFO L231 Difference]: Finished difference. Result has 74 places, 78 transitions, 280 flow [2024-11-23 23:01:08,655 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=280, PETRI_PLACES=74, PETRI_TRANSITIONS=78} [2024-11-23 23:01:08,656 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, -3 predicate places. [2024-11-23 23:01:08,656 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 78 transitions, 280 flow [2024-11-23 23:01:08,656 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.333333333333332) internal successors, (158), 6 states have internal predecessors, (158), 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) [2024-11-23 23:01:08,656 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:01:08,656 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:01:08,665 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd8e65e-7891-475f-af60-a0300448d609/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-23 23:01:08,857 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd8e65e-7891-475f-af60-a0300448d609/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:01:08,857 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-23 23:01:08,857 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:01:08,857 INFO L85 PathProgramCache]: Analyzing trace with hash 887355983, now seen corresponding path program 1 times [2024-11-23 23:01:08,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:01:08,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903696911] [2024-11-23 23:01:08,858 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:01:08,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:01:08,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:01:08,974 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-23 23:01:08,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:01:08,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903696911] [2024-11-23 23:01:08,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903696911] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:01:08,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:01:08,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 23:01:08,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163662887] [2024-11-23 23:01:08,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:01:08,975 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 23:01:08,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:01:08,975 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 23:01:08,975 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 23:01:08,975 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 88 [2024-11-23 23:01:08,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 78 transitions, 280 flow. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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) [2024-11-23 23:01:08,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:01:08,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 88 [2024-11-23 23:01:08,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:01:13,163 INFO L124 PetriNetUnfolderBase]: 24419/36140 cut-off events. [2024-11-23 23:01:13,163 INFO L125 PetriNetUnfolderBase]: For 12706/14987 co-relation queries the response was YES. [2024-11-23 23:01:13,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81513 conditions, 36140 events. 24419/36140 cut-off events. For 12706/14987 co-relation queries the response was YES. Maximal size of possible extension queue 1041. Compared 232576 event pairs, 8589 based on Foata normal form. 732/28082 useless extension candidates. Maximal degree in co-relation 79370. Up to 23607 conditions per place. [2024-11-23 23:01:13,400 INFO L140 encePairwiseOnDemand]: 83/88 looper letters, 87 selfloop transitions, 2 changer transitions 0/109 dead transitions. [2024-11-23 23:01:13,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 109 transitions, 551 flow [2024-11-23 23:01:13,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 23:01:13,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-23 23:01:13,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 162 transitions. [2024-11-23 23:01:13,403 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6136363636363636 [2024-11-23 23:01:13,403 INFO L175 Difference]: Start difference. First operand has 74 places, 78 transitions, 280 flow. Second operand 3 states and 162 transitions. [2024-11-23 23:01:13,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 109 transitions, 551 flow [2024-11-23 23:01:13,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 109 transitions, 547 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-23 23:01:13,413 INFO L231 Difference]: Finished difference. Result has 75 places, 79 transitions, 294 flow [2024-11-23 23:01:13,414 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=294, PETRI_PLACES=75, PETRI_TRANSITIONS=79} [2024-11-23 23:01:13,416 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, -2 predicate places. [2024-11-23 23:01:13,418 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 79 transitions, 294 flow [2024-11-23 23:01:13,419 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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) [2024-11-23 23:01:13,419 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:01:13,419 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] [2024-11-23 23:01:13,419 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-23 23:01:13,419 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-23 23:01:13,420 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:01:13,420 INFO L85 PathProgramCache]: Analyzing trace with hash 925029414, now seen corresponding path program 1 times [2024-11-23 23:01:13,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:01:13,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563944546] [2024-11-23 23:01:13,420 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:01:13,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:01:13,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:01:13,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:01:13,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:01:13,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563944546] [2024-11-23 23:01:13,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563944546] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:01:13,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:01:13,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 23:01:13,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099742288] [2024-11-23 23:01:13,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:01:13,536 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 23:01:13,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:01:13,537 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 23:01:13,537 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 23:01:13,537 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 88 [2024-11-23 23:01:13,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 79 transitions, 294 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) [2024-11-23 23:01:13,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:01:13,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 88 [2024-11-23 23:01:13,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:01:17,138 INFO L124 PetriNetUnfolderBase]: 24429/36212 cut-off events. [2024-11-23 23:01:17,138 INFO L125 PetriNetUnfolderBase]: For 15382/17681 co-relation queries the response was YES. [2024-11-23 23:01:17,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84077 conditions, 36212 events. 24429/36212 cut-off events. For 15382/17681 co-relation queries the response was YES. Maximal size of possible extension queue 1100. Compared 234593 event pairs, 8400 based on Foata normal form. 3/27339 useless extension candidates. Maximal degree in co-relation 81936. Up to 29833 conditions per place. [2024-11-23 23:01:17,325 INFO L140 encePairwiseOnDemand]: 85/88 looper letters, 64 selfloop transitions, 2 changer transitions 11/97 dead transitions. [2024-11-23 23:01:17,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 97 transitions, 495 flow [2024-11-23 23:01:17,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 23:01:17,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-23 23:01:17,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 148 transitions. [2024-11-23 23:01:17,327 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5606060606060606 [2024-11-23 23:01:17,327 INFO L175 Difference]: Start difference. First operand has 75 places, 79 transitions, 294 flow. Second operand 3 states and 148 transitions. [2024-11-23 23:01:17,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 97 transitions, 495 flow [2024-11-23 23:01:17,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 97 transitions, 493 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-23 23:01:17,338 INFO L231 Difference]: Finished difference. Result has 77 places, 73 transitions, 265 flow [2024-11-23 23:01:17,338 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=265, PETRI_PLACES=77, PETRI_TRANSITIONS=73} [2024-11-23 23:01:17,339 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 0 predicate places. [2024-11-23 23:01:17,340 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 73 transitions, 265 flow [2024-11-23 23:01:17,340 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) [2024-11-23 23:01:17,340 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:01:17,340 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:01:17,340 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-23 23:01:17,341 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-23 23:01:17,341 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:01:17,341 INFO L85 PathProgramCache]: Analyzing trace with hash 984522394, now seen corresponding path program 1 times [2024-11-23 23:01:17,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:01:17,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515496552] [2024-11-23 23:01:17,342 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:01:17,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:01:17,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:01:17,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:01:17,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:01:17,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515496552] [2024-11-23 23:01:17,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515496552] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:01:17,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:01:17,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 23:01:17,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384928537] [2024-11-23 23:01:17,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:01:17,530 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 23:01:17,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:01:17,530 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 23:01:17,531 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 23:01:17,558 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 88 [2024-11-23 23:01:17,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 73 transitions, 265 flow. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 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) [2024-11-23 23:01:17,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:01:17,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 88 [2024-11-23 23:01:17,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:01:20,943 INFO L124 PetriNetUnfolderBase]: 20685/30931 cut-off events. [2024-11-23 23:01:20,943 INFO L125 PetriNetUnfolderBase]: For 15899/17924 co-relation queries the response was YES. [2024-11-23 23:01:21,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72012 conditions, 30931 events. 20685/30931 cut-off events. For 15899/17924 co-relation queries the response was YES. Maximal size of possible extension queue 968. Compared 203080 event pairs, 16143 based on Foata normal form. 0/24299 useless extension candidates. Maximal degree in co-relation 71975. Up to 27583 conditions per place. [2024-11-23 23:01:21,088 INFO L140 encePairwiseOnDemand]: 84/88 looper letters, 49 selfloop transitions, 2 changer transitions 0/71 dead transitions. [2024-11-23 23:01:21,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 71 transitions, 361 flow [2024-11-23 23:01:21,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 23:01:21,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 23:01:21,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 144 transitions. [2024-11-23 23:01:21,090 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-11-23 23:01:21,091 INFO L175 Difference]: Start difference. First operand has 77 places, 73 transitions, 265 flow. Second operand 4 states and 144 transitions. [2024-11-23 23:01:21,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 71 transitions, 361 flow [2024-11-23 23:01:21,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 71 transitions, 345 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-11-23 23:01:21,103 INFO L231 Difference]: Finished difference. Result has 73 places, 71 transitions, 247 flow [2024-11-23 23:01:21,104 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=247, PETRI_PLACES=73, PETRI_TRANSITIONS=71} [2024-11-23 23:01:21,104 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, -4 predicate places. [2024-11-23 23:01:21,105 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 71 transitions, 247 flow [2024-11-23 23:01:21,105 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 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) [2024-11-23 23:01:21,105 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:01:21,105 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:01:21,105 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-23 23:01:21,106 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-23 23:01:21,106 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:01:21,106 INFO L85 PathProgramCache]: Analyzing trace with hash 984522395, now seen corresponding path program 1 times [2024-11-23 23:01:21,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:01:21,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320086292] [2024-11-23 23:01:21,107 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:01:21,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:01:21,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:01:21,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:01:21,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:01:21,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320086292] [2024-11-23 23:01:21,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320086292] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:01:21,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:01:21,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 23:01:21,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740174719] [2024-11-23 23:01:21,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:01:21,292 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 23:01:21,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:01:21,293 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 23:01:21,293 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 23:01:21,303 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 88 [2024-11-23 23:01:21,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 71 transitions, 247 flow. Second operand has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 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) [2024-11-23 23:01:21,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:01:21,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 88 [2024-11-23 23:01:21,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:01:25,650 INFO L124 PetriNetUnfolderBase]: 26934/40836 cut-off events. [2024-11-23 23:01:25,650 INFO L125 PetriNetUnfolderBase]: For 19343/21806 co-relation queries the response was YES. [2024-11-23 23:01:25,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93644 conditions, 40836 events. 26934/40836 cut-off events. For 19343/21806 co-relation queries the response was YES. Maximal size of possible extension queue 1063. Compared 277668 event pairs, 21455 based on Foata normal form. 340/32270 useless extension candidates. Maximal degree in co-relation 93608. Up to 27587 conditions per place. [2024-11-23 23:01:25,832 INFO L140 encePairwiseOnDemand]: 79/88 looper letters, 84 selfloop transitions, 8 changer transitions 0/112 dead transitions. [2024-11-23 23:01:25,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 112 transitions, 561 flow [2024-11-23 23:01:25,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 23:01:25,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 23:01:25,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 222 transitions. [2024-11-23 23:01:25,834 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5045454545454545 [2024-11-23 23:01:25,834 INFO L175 Difference]: Start difference. First operand has 73 places, 71 transitions, 247 flow. Second operand 5 states and 222 transitions. [2024-11-23 23:01:25,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 112 transitions, 561 flow [2024-11-23 23:01:25,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 112 transitions, 557 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-23 23:01:25,842 INFO L231 Difference]: Finished difference. Result has 78 places, 75 transitions, 293 flow [2024-11-23 23:01:25,842 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=293, PETRI_PLACES=78, PETRI_TRANSITIONS=75} [2024-11-23 23:01:25,843 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 1 predicate places. [2024-11-23 23:01:25,843 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 75 transitions, 293 flow [2024-11-23 23:01:25,843 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 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) [2024-11-23 23:01:25,843 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:01:25,843 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:01:25,844 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-23 23:01:25,844 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-23 23:01:25,844 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:01:25,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1233283775, now seen corresponding path program 1 times [2024-11-23 23:01:25,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:01:25,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183210588] [2024-11-23 23:01:25,845 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:01:25,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:01:25,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:01:25,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:01:25,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:01:25,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183210588] [2024-11-23 23:01:25,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183210588] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:01:25,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:01:25,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 23:01:25,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749718612] [2024-11-23 23:01:25,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:01:25,910 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 23:01:25,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:01:25,911 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 23:01:25,911 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 23:01:25,928 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 88 [2024-11-23 23:01:25,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 75 transitions, 293 flow. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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) [2024-11-23 23:01:25,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:01:25,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 88 [2024-11-23 23:01:25,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:01:30,238 INFO L124 PetriNetUnfolderBase]: 29449/42288 cut-off events. [2024-11-23 23:01:30,238 INFO L125 PetriNetUnfolderBase]: For 19647/22006 co-relation queries the response was YES. [2024-11-23 23:01:30,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100510 conditions, 42288 events. 29449/42288 cut-off events. For 19647/22006 co-relation queries the response was YES. Maximal size of possible extension queue 811. Compared 249562 event pairs, 15757 based on Foata normal form. 474/35675 useless extension candidates. Maximal degree in co-relation 100467. Up to 26799 conditions per place. [2024-11-23 23:01:30,473 INFO L140 encePairwiseOnDemand]: 83/88 looper letters, 81 selfloop transitions, 5 changer transitions 0/100 dead transitions. [2024-11-23 23:01:30,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 100 transitions, 542 flow [2024-11-23 23:01:30,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 23:01:30,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-23 23:01:30,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 144 transitions. [2024-11-23 23:01:30,475 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-11-23 23:01:30,475 INFO L175 Difference]: Start difference. First operand has 78 places, 75 transitions, 293 flow. Second operand 3 states and 144 transitions. [2024-11-23 23:01:30,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 100 transitions, 542 flow [2024-11-23 23:01:30,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 100 transitions, 540 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-23 23:01:30,488 INFO L231 Difference]: Finished difference. Result has 81 places, 76 transitions, 319 flow [2024-11-23 23:01:30,488 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=319, PETRI_PLACES=81, PETRI_TRANSITIONS=76} [2024-11-23 23:01:30,489 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 4 predicate places. [2024-11-23 23:01:30,489 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 76 transitions, 319 flow [2024-11-23 23:01:30,489 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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) [2024-11-23 23:01:30,489 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:01:30,489 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:01:30,489 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-23 23:01:30,490 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-23 23:01:30,490 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:01:30,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1249465946, now seen corresponding path program 1 times [2024-11-23 23:01:30,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:01:30,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202807484] [2024-11-23 23:01:30,491 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:01:30,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:01:30,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:01:31,052 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:01:31,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:01:31,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202807484] [2024-11-23 23:01:31,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202807484] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:01:31,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936904377] [2024-11-23 23:01:31,053 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:01:31,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:01:31,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd8e65e-7891-475f-af60-a0300448d609/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:01:31,058 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd8e65e-7891-475f-af60-a0300448d609/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:01:31,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd8e65e-7891-475f-af60-a0300448d609/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-23 23:01:31,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:01:31,233 INFO L256 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-23 23:01:31,236 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:01:31,488 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:01:31,488 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:01:31,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936904377] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:01:31,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 23:01:31,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2024-11-23 23:01:31,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903001022] [2024-11-23 23:01:31,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:01:31,489 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 23:01:31,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:01:31,489 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 23:01:31,489 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-23 23:01:31,529 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 88 [2024-11-23 23:01:31,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 76 transitions, 319 flow. Second operand has 5 states, 5 states have (on average 31.0) internal successors, (155), 5 states have internal predecessors, (155), 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) [2024-11-23 23:01:31,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:01:31,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 88 [2024-11-23 23:01:31,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand