./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 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e58b35-6c2c-4d26-906b-0ea17d198d59/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e58b35-6c2c-4d26-906b-0ea17d198d59/bin/uautomizer-verify-4GaUIPS5ZU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e58b35-6c2c-4d26-906b-0ea17d198d59/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e58b35-6c2c-4d26-906b-0ea17d198d59/bin/uautomizer-verify-4GaUIPS5ZU/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_d1e58b35-6c2c-4d26-906b-0ea17d198d59/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e58b35-6c2c-4d26-906b-0ea17d198d59/bin/uautomizer-verify-4GaUIPS5ZU --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 0.2.5-dev-4fc63b2 [2024-10-31 21:57:08,097 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 21:57:08,219 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e58b35-6c2c-4d26-906b-0ea17d198d59/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-31 21:57:08,225 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 21:57:08,226 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 21:57:08,268 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 21:57:08,272 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 21:57:08,272 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 21:57:08,273 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 21:57:08,274 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 21:57:08,274 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 21:57:08,274 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 21:57:08,277 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 21:57:08,279 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 21:57:08,282 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 21:57:08,282 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 21:57:08,283 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 21:57:08,283 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 21:57:08,283 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 21:57:08,284 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 21:57:08,284 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-31 21:57:08,285 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-31 21:57:08,285 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-31 21:57:08,286 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 21:57:08,290 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-31 21:57:08,290 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 21:57:08,291 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-31 21:57:08,291 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 21:57:08,291 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 21:57:08,292 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 21:57:08,292 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 21:57:08,293 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 21:57:08,293 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 21:57:08,296 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 21:57:08,297 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 21:57:08,297 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 21:57:08,297 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 21:57:08,297 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 21:57:08,298 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 21:57:08,298 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 21:57:08,299 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 21:57:08,299 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 21:57:08,300 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e58b35-6c2c-4d26-906b-0ea17d198d59/bin/uautomizer-verify-4GaUIPS5ZU/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e58b35-6c2c-4d26-906b-0ea17d198d59/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 83c7202603a0719c5812e4d7043f4665de4d954c89c656bd6312ac9e8fdcb494 [2024-10-31 21:57:08,619 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 21:57:08,656 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 21:57:08,660 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 21:57:08,661 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 21:57:08,662 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 21:57:08,664 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e58b35-6c2c-4d26-906b-0ea17d198d59/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c Unable to find full path for "g++" [2024-10-31 21:57:10,993 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 21:57:11,260 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 21:57:11,261 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e58b35-6c2c-4d26-906b-0ea17d198d59/sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c [2024-10-31 21:57:11,276 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e58b35-6c2c-4d26-906b-0ea17d198d59/bin/uautomizer-verify-4GaUIPS5ZU/data/c86230f83/73693360cf4443068e5184f1a4efe675/FLAG8d886371b [2024-10-31 21:57:11,579 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e58b35-6c2c-4d26-906b-0ea17d198d59/bin/uautomizer-verify-4GaUIPS5ZU/data/c86230f83/73693360cf4443068e5184f1a4efe675 [2024-10-31 21:57:11,583 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 21:57:11,584 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 21:57:11,586 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 21:57:11,586 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 21:57:11,592 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 21:57:11,593 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 09:57:11" (1/1) ... [2024-10-31 21:57:11,595 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@439ac8bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:57:11, skipping insertion in model container [2024-10-31 21:57:11,595 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 09:57:11" (1/1) ... [2024-10-31 21:57:11,632 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 21:57:11,872 WARN L1053 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-10-31 21:57:11,878 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 21:57:11,891 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 21:57:11,932 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 21:57:11,955 INFO L204 MainTranslator]: Completed translation [2024-10-31 21:57:11,955 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:57:11 WrapperNode [2024-10-31 21:57:11,956 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 21:57:11,957 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 21:57:11,957 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 21:57:11,958 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 21:57:11,967 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:57:11" (1/1) ... [2024-10-31 21:57:11,977 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:57:11" (1/1) ... [2024-10-31 21:57:12,022 INFO L138 Inliner]: procedures = 24, calls = 54, calls flagged for inlining = 21, calls inlined = 25, statements flattened = 339 [2024-10-31 21:57:12,024 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 21:57:12,025 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 21:57:12,025 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 21:57:12,025 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 21:57:12,036 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:57:11" (1/1) ... [2024-10-31 21:57:12,037 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:57:11" (1/1) ... [2024-10-31 21:57:12,041 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:57:11" (1/1) ... [2024-10-31 21:57:12,066 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]. [2024-10-31 21:57:12,066 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:57:11" (1/1) ... [2024-10-31 21:57:12,066 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:57:11" (1/1) ... [2024-10-31 21:57:12,080 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:57:11" (1/1) ... [2024-10-31 21:57:12,085 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:57:11" (1/1) ... [2024-10-31 21:57:12,088 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:57:11" (1/1) ... [2024-10-31 21:57:12,090 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:57:11" (1/1) ... [2024-10-31 21:57:12,094 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 21:57:12,099 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 21:57:12,099 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 21:57:12,099 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 21:57:12,100 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:57:11" (1/1) ... [2024-10-31 21:57:12,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 21:57:12,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e58b35-6c2c-4d26-906b-0ea17d198d59/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:57:12,140 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e58b35-6c2c-4d26-906b-0ea17d198d59/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 21:57:12,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e58b35-6c2c-4d26-906b-0ea17d198d59/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 21:57:12,175 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 21:57:12,175 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-31 21:57:12,176 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-31 21:57:12,176 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-31 21:57:12,176 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-31 21:57:12,176 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-10-31 21:57:12,176 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-10-31 21:57:12,176 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 21:57:12,176 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-31 21:57:12,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-31 21:57:12,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-31 21:57:12,177 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-31 21:57:12,177 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-31 21:57:12,177 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-31 21:57:12,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 21:57:12,178 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 21:57:12,178 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-31 21:57:12,178 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-31 21:57:12,180 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-31 21:57:12,331 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 21:57:12,334 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 21:57:13,065 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-31 21:57:13,065 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 21:57:13,731 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 21:57:13,732 INFO L316 CfgBuilder]: Removed 6 assume(true) statements. [2024-10-31 21:57:13,733 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 09:57:13 BoogieIcfgContainer [2024-10-31 21:57:13,734 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 21:57:13,751 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 21:57:13,751 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 21:57:13,755 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 21:57:13,756 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 09:57:11" (1/3) ... [2024-10-31 21:57:13,758 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4240887d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 09:57:13, skipping insertion in model container [2024-10-31 21:57:13,758 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:57:11" (2/3) ... [2024-10-31 21:57:13,758 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4240887d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 09:57:13, skipping insertion in model container [2024-10-31 21:57:13,760 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 09:57:13" (3/3) ... [2024-10-31 21:57:13,762 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-commit-1.wvr-bad.c [2024-10-31 21:57:13,801 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 21:57:13,805 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 24 error locations. [2024-10-31 21:57:13,805 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-31 21:57:13,961 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-10-31 21:57:14,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 88 transitions, 197 flow [2024-10-31 21:57:14,075 INFO L124 PetriNetUnfolderBase]: 17/85 cut-off events. [2024-10-31 21:57:14,076 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-31 21:57:14,086 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 253 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. [2024-10-31 21:57:14,086 INFO L82 GeneralOperation]: Start removeDead. Operand has 81 places, 88 transitions, 197 flow [2024-10-31 21:57:14,094 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 77 places, 84 transitions, 186 flow [2024-10-31 21:57:14,109 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 21:57:14,119 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;@6ef95355, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 21:57:14,119 INFO L334 AbstractCegarLoop]: Starting to check reachability of 43 error locations. [2024-10-31 21:57:14,124 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-31 21:57:14,124 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-10-31 21:57:14,125 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-31 21:57:14,125 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:57:14,126 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-31 21:57:14,126 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-10-31 21:57:14,133 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:57:14,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1042750, now seen corresponding path program 1 times [2024-10-31 21:57:14,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:57:14,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741689584] [2024-10-31 21:57:14,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:57:14,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:57:14,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:57:14,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:57:14,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:57:14,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741689584] [2024-10-31 21:57:14,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741689584] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:57:14,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:57:14,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-31 21:57:14,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10064538] [2024-10-31 21:57:14,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:57:14,590 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 21:57:14,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:57:14,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 21:57:14,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 21:57:14,672 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 88 [2024-10-31 21:57:14,678 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) [2024-10-31 21:57:14,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:57:14,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 88 [2024-10-31 21:57:14,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:57:16,582 INFO L124 PetriNetUnfolderBase]: 7256/10526 cut-off events. [2024-10-31 21:57:16,582 INFO L125 PetriNetUnfolderBase]: For 340/340 co-relation queries the response was YES. [2024-10-31 21:57:16,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20342 conditions, 10526 events. 7256/10526 cut-off events. For 340/340 co-relation queries the response was YES. Maximal size of possible extension queue 1012. Compared 69469 event pairs, 5236 based on Foata normal form. 1/5686 useless extension candidates. Maximal degree in co-relation 19654. Up to 9450 conditions per place. [2024-10-31 21:57:16,673 INFO L140 encePairwiseOnDemand]: 79/88 looper letters, 54 selfloop transitions, 2 changer transitions 0/76 dead transitions. [2024-10-31 21:57:16,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 76 transitions, 282 flow [2024-10-31 21:57:16,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 21:57:16,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 21:57:16,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 135 transitions. [2024-10-31 21:57:16,689 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5113636363636364 [2024-10-31 21:57:16,691 INFO L175 Difference]: Start difference. First operand has 77 places, 84 transitions, 186 flow. Second operand 3 states and 135 transitions. [2024-10-31 21:57:16,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 76 transitions, 282 flow [2024-10-31 21:57:16,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 76 transitions, 270 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-10-31 21:57:16,716 INFO L231 Difference]: Finished difference. Result has 68 places, 76 transitions, 162 flow [2024-10-31 21:57:16,718 INFO L260 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} [2024-10-31 21:57:16,722 INFO L277 CegarLoopForPetriNet]: 77 programPoint places, -9 predicate places. [2024-10-31 21:57:16,723 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 76 transitions, 162 flow [2024-10-31 21:57:16,723 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) [2024-10-31 21:57:16,723 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:57:16,724 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-31 21:57:16,724 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 21:57:16,725 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-10-31 21:57:16,725 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:57:16,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1042751, now seen corresponding path program 1 times [2024-10-31 21:57:16,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:57:16,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714802212] [2024-10-31 21:57:16,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:57:16,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:57:16,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:57:17,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:57:17,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:57:17,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714802212] [2024-10-31 21:57:17,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714802212] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:57:17,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:57:17,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 21:57:17,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905330441] [2024-10-31 21:57:17,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:57:17,168 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 21:57:17,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:57:17,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 21:57:17,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 21:57:17,201 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 88 [2024-10-31 21:57:17,202 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) [2024-10-31 21:57:17,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:57:17,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 88 [2024-10-31 21:57:17,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:57:18,869 INFO L124 PetriNetUnfolderBase]: 7256/10523 cut-off events. [2024-10-31 21:57:18,870 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2024-10-31 21:57:18,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20117 conditions, 10523 events. 7256/10523 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 1012. Compared 69452 event pairs, 5236 based on Foata normal form. 0/5683 useless extension candidates. Maximal degree in co-relation 20092. Up to 9450 conditions per place. [2024-10-31 21:57:18,994 INFO L140 encePairwiseOnDemand]: 77/88 looper letters, 48 selfloop transitions, 8 changer transitions 0/73 dead transitions. [2024-10-31 21:57:18,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 73 transitions, 268 flow [2024-10-31 21:57:18,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 21:57:18,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 21:57:18,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 155 transitions. [2024-10-31 21:57:18,997 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4403409090909091 [2024-10-31 21:57:18,998 INFO L175 Difference]: Start difference. First operand has 68 places, 76 transitions, 162 flow. Second operand 4 states and 155 transitions. [2024-10-31 21:57:18,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 73 transitions, 268 flow [2024-10-31 21:57:18,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 73 transitions, 264 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 21:57:19,001 INFO L231 Difference]: Finished difference. Result has 66 places, 73 transitions, 168 flow [2024-10-31 21:57:19,001 INFO L260 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} [2024-10-31 21:57:19,002 INFO L277 CegarLoopForPetriNet]: 77 programPoint places, -11 predicate places. [2024-10-31 21:57:19,003 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 73 transitions, 168 flow [2024-10-31 21:57:19,003 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) [2024-10-31 21:57:19,003 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:57:19,004 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:57:19,004 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 21:57:19,004 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-10-31 21:57:19,005 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:57:19,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1084028577, now seen corresponding path program 1 times [2024-10-31 21:57:19,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:57:19,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110709399] [2024-10-31 21:57:19,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:57:19,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:57:19,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:57:19,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:57:19,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:57:19,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110709399] [2024-10-31 21:57:19,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110709399] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:57:19,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:57:19,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-31 21:57:19,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122473687] [2024-10-31 21:57:19,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:57:19,153 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 21:57:19,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:57:19,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 21:57:19,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 21:57:19,157 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 88 [2024-10-31 21:57:19,157 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) [2024-10-31 21:57:19,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:57:19,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 88 [2024-10-31 21:57:19,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:57:21,413 INFO L124 PetriNetUnfolderBase]: 12107/17625 cut-off events. [2024-10-31 21:57:21,413 INFO L125 PetriNetUnfolderBase]: For 162/162 co-relation queries the response was YES. [2024-10-31 21:57:21,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33675 conditions, 17625 events. 12107/17625 cut-off events. For 162/162 co-relation queries the response was YES. Maximal size of possible extension queue 1334. Compared 121938 event pairs, 4256 based on Foata normal form. 350/10101 useless extension candidates. Maximal degree in co-relation 33644. Up to 9751 conditions per place. [2024-10-31 21:57:21,539 INFO L140 encePairwiseOnDemand]: 79/88 looper letters, 90 selfloop transitions, 3 changer transitions 0/110 dead transitions. [2024-10-31 21:57:21,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 110 transitions, 432 flow [2024-10-31 21:57:21,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 21:57:21,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 21:57:21,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 180 transitions. [2024-10-31 21:57:21,542 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6818181818181818 [2024-10-31 21:57:21,542 INFO L175 Difference]: Start difference. First operand has 66 places, 73 transitions, 168 flow. Second operand 3 states and 180 transitions. [2024-10-31 21:57:21,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 110 transitions, 432 flow [2024-10-31 21:57:21,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 110 transitions, 416 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-31 21:57:21,545 INFO L231 Difference]: Finished difference. Result has 66 places, 75 transitions, 181 flow [2024-10-31 21:57:21,545 INFO L260 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} [2024-10-31 21:57:21,546 INFO L277 CegarLoopForPetriNet]: 77 programPoint places, -11 predicate places. [2024-10-31 21:57:21,546 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 75 transitions, 181 flow [2024-10-31 21:57:21,547 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) [2024-10-31 21:57:21,547 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:57:21,547 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:57:21,547 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-31 21:57:21,547 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-10-31 21:57:21,548 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:57:21,548 INFO L85 PathProgramCache]: Analyzing trace with hash -754850353, now seen corresponding path program 1 times [2024-10-31 21:57:21,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:57:21,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634753105] [2024-10-31 21:57:21,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:57:21,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:57:21,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:57:21,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:57:21,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:57:21,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634753105] [2024-10-31 21:57:21,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634753105] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:57:21,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:57:21,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 21:57:21,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894885072] [2024-10-31 21:57:21,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:57:21,681 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 21:57:21,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:57:21,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 21:57:21,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 21:57:21,694 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 88 [2024-10-31 21:57:21,695 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) [2024-10-31 21:57:21,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:57:21,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 88 [2024-10-31 21:57:21,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:57:24,348 INFO L124 PetriNetUnfolderBase]: 15255/21853 cut-off events. [2024-10-31 21:57:24,348 INFO L125 PetriNetUnfolderBase]: For 1276/1300 co-relation queries the response was YES. [2024-10-31 21:57:24,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44962 conditions, 21853 events. 15255/21853 cut-off events. For 1276/1300 co-relation queries the response was YES. Maximal size of possible extension queue 837. Compared 137905 event pairs, 5655 based on Foata normal form. 0/14468 useless extension candidates. Maximal degree in co-relation 8224. Up to 10528 conditions per place. [2024-10-31 21:57:24,470 INFO L140 encePairwiseOnDemand]: 83/88 looper letters, 91 selfloop transitions, 4 changer transitions 0/107 dead transitions. [2024-10-31 21:57:24,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 107 transitions, 443 flow [2024-10-31 21:57:24,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 21:57:24,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 21:57:24,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 160 transitions. [2024-10-31 21:57:24,473 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6060606060606061 [2024-10-31 21:57:24,473 INFO L175 Difference]: Start difference. First operand has 66 places, 75 transitions, 181 flow. Second operand 3 states and 160 transitions. [2024-10-31 21:57:24,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 107 transitions, 443 flow [2024-10-31 21:57:24,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 107 transitions, 440 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 21:57:24,477 INFO L231 Difference]: Finished difference. Result has 69 places, 76 transitions, 200 flow [2024-10-31 21:57:24,477 INFO L260 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} [2024-10-31 21:57:24,478 INFO L277 CegarLoopForPetriNet]: 77 programPoint places, -8 predicate places. [2024-10-31 21:57:24,478 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 76 transitions, 200 flow [2024-10-31 21:57:24,479 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) [2024-10-31 21:57:24,479 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:57:24,479 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:57:24,479 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-31 21:57:24,480 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-10-31 21:57:24,480 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:57:24,481 INFO L85 PathProgramCache]: Analyzing trace with hash -44025330, now seen corresponding path program 1 times [2024-10-31 21:57:24,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:57:24,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290813379] [2024-10-31 21:57:24,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:57:24,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:57:24,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:57:24,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:57:24,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:57:24,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290813379] [2024-10-31 21:57:24,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290813379] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:57:24,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:57:24,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 21:57:24,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101491435] [2024-10-31 21:57:24,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:57:24,693 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 21:57:24,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:57:24,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 21:57:24,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 21:57:24,695 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 88 [2024-10-31 21:57:24,699 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) [2024-10-31 21:57:24,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:57:24,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 88 [2024-10-31 21:57:24,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:57:28,243 INFO L124 PetriNetUnfolderBase]: 19154/28485 cut-off events. [2024-10-31 21:57:28,243 INFO L125 PetriNetUnfolderBase]: For 5068/5232 co-relation queries the response was YES. [2024-10-31 21:57:28,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60717 conditions, 28485 events. 19154/28485 cut-off events. For 5068/5232 co-relation queries the response was YES. Maximal size of possible extension queue 1024. Compared 194819 event pairs, 7868 based on Foata normal form. 482/19458 useless extension candidates. Maximal degree in co-relation 13752. Up to 12927 conditions per place. [2024-10-31 21:57:28,441 INFO L140 encePairwiseOnDemand]: 83/88 looper letters, 96 selfloop transitions, 2 changer transitions 0/116 dead transitions. [2024-10-31 21:57:28,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 116 transitions, 504 flow [2024-10-31 21:57:28,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 21:57:28,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 21:57:28,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 180 transitions. [2024-10-31 21:57:28,444 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6818181818181818 [2024-10-31 21:57:28,444 INFO L175 Difference]: Start difference. First operand has 69 places, 76 transitions, 200 flow. Second operand 3 states and 180 transitions. [2024-10-31 21:57:28,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 116 transitions, 504 flow [2024-10-31 21:57:28,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 116 transitions, 492 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 21:57:28,455 INFO L231 Difference]: Finished difference. Result has 70 places, 77 transitions, 208 flow [2024-10-31 21:57:28,455 INFO L260 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} [2024-10-31 21:57:28,459 INFO L277 CegarLoopForPetriNet]: 77 programPoint places, -7 predicate places. [2024-10-31 21:57:28,459 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 77 transitions, 208 flow [2024-10-31 21:57:28,459 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) [2024-10-31 21:57:28,460 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:57:28,460 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:57:28,463 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-31 21:57:28,463 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-10-31 21:57:28,463 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:57:28,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1364783077, now seen corresponding path program 1 times [2024-10-31 21:57:28,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:57:28,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936649256] [2024-10-31 21:57:28,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:57:28,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:57:28,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:57:28,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:57:28,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:57:28,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936649256] [2024-10-31 21:57:28,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936649256] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:57:28,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:57:28,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 21:57:28,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044319549] [2024-10-31 21:57:28,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:57:28,518 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 21:57:28,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:57:28,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 21:57:28,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 21:57:28,529 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 88 [2024-10-31 21:57:28,530 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) [2024-10-31 21:57:28,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:57:28,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 88 [2024-10-31 21:57:28,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:57:32,065 INFO L124 PetriNetUnfolderBase]: 23767/34263 cut-off events. [2024-10-31 21:57:32,065 INFO L125 PetriNetUnfolderBase]: For 4421/4835 co-relation queries the response was YES. [2024-10-31 21:57:32,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73027 conditions, 34263 events. 23767/34263 cut-off events. For 4421/4835 co-relation queries the response was YES. Maximal size of possible extension queue 1488. Compared 225567 event pairs, 11883 based on Foata normal form. 0/23383 useless extension candidates. Maximal degree in co-relation 22410. Up to 20195 conditions per place. [2024-10-31 21:57:32,259 INFO L140 encePairwiseOnDemand]: 83/88 looper letters, 93 selfloop transitions, 4 changer transitions 0/112 dead transitions. [2024-10-31 21:57:32,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 112 transitions, 493 flow [2024-10-31 21:57:32,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 21:57:32,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 21:57:32,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 168 transitions. [2024-10-31 21:57:32,262 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6363636363636364 [2024-10-31 21:57:32,262 INFO L175 Difference]: Start difference. First operand has 70 places, 77 transitions, 208 flow. Second operand 3 states and 168 transitions. [2024-10-31 21:57:32,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 112 transitions, 493 flow [2024-10-31 21:57:32,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 112 transitions, 491 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 21:57:32,267 INFO L231 Difference]: Finished difference. Result has 73 places, 77 transitions, 224 flow [2024-10-31 21:57:32,271 INFO L260 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} [2024-10-31 21:57:32,272 INFO L277 CegarLoopForPetriNet]: 77 programPoint places, -4 predicate places. [2024-10-31 21:57:32,272 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 77 transitions, 224 flow [2024-10-31 21:57:32,272 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) [2024-10-31 21:57:32,272 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:57:32,272 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:57:32,273 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-31 21:57:32,273 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-10-31 21:57:32,273 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:57:32,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1679102784, now seen corresponding path program 1 times [2024-10-31 21:57:32,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:57:32,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848032606] [2024-10-31 21:57:32,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:57:32,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:57:32,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:57:32,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:57:32,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:57:32,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848032606] [2024-10-31 21:57:32,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848032606] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:57:32,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:57:32,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 21:57:32,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688113538] [2024-10-31 21:57:32,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:57:32,421 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 21:57:32,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:57:32,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 21:57:32,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 21:57:32,437 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 88 [2024-10-31 21:57:32,437 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) [2024-10-31 21:57:32,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:57:32,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 88 [2024-10-31 21:57:32,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:57:35,425 INFO L124 PetriNetUnfolderBase]: 21337/31707 cut-off events. [2024-10-31 21:57:35,425 INFO L125 PetriNetUnfolderBase]: For 9213/9915 co-relation queries the response was YES. [2024-10-31 21:57:35,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70126 conditions, 31707 events. 21337/31707 cut-off events. For 9213/9915 co-relation queries the response was YES. Maximal size of possible extension queue 1376. Compared 214214 event pairs, 16426 based on Foata normal form. 112/21788 useless extension candidates. Maximal degree in co-relation 42064. Up to 26815 conditions per place. [2024-10-31 21:57:35,666 INFO L140 encePairwiseOnDemand]: 76/88 looper letters, 87 selfloop transitions, 9 changer transitions 0/115 dead transitions. [2024-10-31 21:57:35,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 115 transitions, 498 flow [2024-10-31 21:57:35,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 21:57:35,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 21:57:35,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 232 transitions. [2024-10-31 21:57:35,669 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5272727272727272 [2024-10-31 21:57:35,669 INFO L175 Difference]: Start difference. First operand has 73 places, 77 transitions, 224 flow. Second operand 5 states and 232 transitions. [2024-10-31 21:57:35,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 115 transitions, 498 flow [2024-10-31 21:57:35,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 115 transitions, 490 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 21:57:35,688 INFO L231 Difference]: Finished difference. Result has 78 places, 85 transitions, 288 flow [2024-10-31 21:57:35,688 INFO L260 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} [2024-10-31 21:57:35,689 INFO L277 CegarLoopForPetriNet]: 77 programPoint places, 1 predicate places. [2024-10-31 21:57:35,689 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 85 transitions, 288 flow [2024-10-31 21:57:35,690 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) [2024-10-31 21:57:35,690 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:57:35,690 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:57:35,691 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-31 21:57:35,691 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread3Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-10-31 21:57:35,691 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:57:35,692 INFO L85 PathProgramCache]: Analyzing trace with hash -512576584, now seen corresponding path program 1 times [2024-10-31 21:57:35,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:57:35,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42465644] [2024-10-31 21:57:35,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:57:35,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:57:35,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:57:35,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:57:35,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:57:35,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42465644] [2024-10-31 21:57:35,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42465644] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:57:35,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:57:35,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 21:57:35,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368212191] [2024-10-31 21:57:35,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:57:35,765 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 21:57:35,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:57:35,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 21:57:35,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 21:57:35,773 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 88 [2024-10-31 21:57:35,773 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) [2024-10-31 21:57:35,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:57:35,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 88 [2024-10-31 21:57:35,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand