./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-wmm/safe019_rmo.oepc.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec9c51-d8f0-45c6-9ed3-b19e1b737f0b/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec9c51-d8f0-45c6-9ed3-b19e1b737f0b/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec9c51-d8f0-45c6-9ed3-b19e1b737f0b/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec9c51-d8f0-45c6-9ed3-b19e1b737f0b/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-wmm/safe019_rmo.oepc.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec9c51-d8f0-45c6-9ed3-b19e1b737f0b/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec9c51-d8f0-45c6-9ed3-b19e1b737f0b/bin/uautomizer-verify-NlZe1sFDwI --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 63f865703c59d821a54141355edec3427193a51b37abbaa1f96833fe96db9b5e --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:57:44,210 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:57:44,328 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec9c51-d8f0-45c6-9ed3-b19e1b737f0b/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-24 21:57:44,334 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:57:44,335 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:57:44,381 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:57:44,381 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:57:44,382 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:57:44,383 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:57:44,390 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:57:44,391 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:57:44,392 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:57:44,393 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:57:44,395 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:57:44,396 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:57:44,396 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:57:44,397 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:57:44,397 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:57:44,398 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:57:44,398 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:57:44,398 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 21:57:44,399 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 21:57:44,400 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 21:57:44,400 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:57:44,400 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 21:57:44,401 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 21:57:44,401 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:57:44,402 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:57:44,403 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:57:44,403 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:57:44,404 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:57:44,405 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:57:44,405 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:57:44,405 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:57:44,406 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:57:44,406 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:57:44,406 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:57:44,406 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:57:44,407 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:57:44,407 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:57:44,407 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:57:44,408 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_ffec9c51-d8f0-45c6-9ed3-b19e1b737f0b/bin/uautomizer-verify-NlZe1sFDwI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec9c51-d8f0-45c6-9ed3-b19e1b737f0b/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 63f865703c59d821a54141355edec3427193a51b37abbaa1f96833fe96db9b5e [2023-11-24 21:57:44,758 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:57:44,796 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:57:44,799 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:57:44,800 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:57:44,801 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:57:44,802 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec9c51-d8f0-45c6-9ed3-b19e1b737f0b/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/pthread-wmm/safe019_rmo.oepc.i [2023-11-24 21:57:47,922 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:57:48,263 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:57:48,264 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec9c51-d8f0-45c6-9ed3-b19e1b737f0b/sv-benchmarks/c/pthread-wmm/safe019_rmo.oepc.i [2023-11-24 21:57:48,285 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec9c51-d8f0-45c6-9ed3-b19e1b737f0b/bin/uautomizer-verify-NlZe1sFDwI/data/f959aef71/21254a28959e45a0ba62bc2fd571cec6/FLAG62c2746c8 [2023-11-24 21:57:48,301 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec9c51-d8f0-45c6-9ed3-b19e1b737f0b/bin/uautomizer-verify-NlZe1sFDwI/data/f959aef71/21254a28959e45a0ba62bc2fd571cec6 [2023-11-24 21:57:48,304 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:57:48,305 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:57:48,307 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:57:48,307 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:57:48,313 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:57:48,314 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:57:48" (1/1) ... [2023-11-24 21:57:48,315 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59fb7a56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:57:48, skipping insertion in model container [2023-11-24 21:57:48,316 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:57:48" (1/1) ... [2023-11-24 21:57:48,370 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:57:48,941 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:57:48,963 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:57:49,057 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:57:49,092 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 21:57:49,092 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 21:57:49,101 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:57:49,101 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:57:49 WrapperNode [2023-11-24 21:57:49,101 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:57:49,103 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:57:49,103 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:57:49,103 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:57:49,111 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:57:49" (1/1) ... [2023-11-24 21:57:49,145 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:57:49" (1/1) ... [2023-11-24 21:57:49,199 INFO L138 Inliner]: procedures = 177, calls = 86, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 187 [2023-11-24 21:57:49,201 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:57:49,202 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:57:49,203 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:57:49,203 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:57:49,216 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:57:49" (1/1) ... [2023-11-24 21:57:49,216 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:57:49" (1/1) ... [2023-11-24 21:57:49,222 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:57:49" (1/1) ... [2023-11-24 21:57:49,261 INFO L175 MemorySlicer]: Split 28 memory accesses to 6 slices as follows [2, 1, 1, 22, 1, 1]. 79 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 0, 0, 1, 0, 0]. The 13 writes are split as follows [0, 1, 1, 9, 1, 1]. [2023-11-24 21:57:49,261 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:57:49" (1/1) ... [2023-11-24 21:57:49,262 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:57:49" (1/1) ... [2023-11-24 21:57:49,275 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:57:49" (1/1) ... [2023-11-24 21:57:49,278 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:57:49" (1/1) ... [2023-11-24 21:57:49,282 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:57:49" (1/1) ... [2023-11-24 21:57:49,285 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:57:49" (1/1) ... [2023-11-24 21:57:49,292 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:57:49,293 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:57:49,293 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:57:49,293 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:57:49,294 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:57:49" (1/1) ... [2023-11-24 21:57:49,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:57:49,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec9c51-d8f0-45c6-9ed3-b19e1b737f0b/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:57:49,337 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec9c51-d8f0-45c6-9ed3-b19e1b737f0b/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:57:49,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec9c51-d8f0-45c6-9ed3-b19e1b737f0b/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:57:49,392 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-24 21:57:49,392 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-24 21:57:49,392 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-24 21:57:49,393 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-24 21:57:49,393 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-24 21:57:49,393 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-11-24 21:57:49,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-24 21:57:49,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-24 21:57:49,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-24 21:57:49,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-24 21:57:49,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-24 21:57:49,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-11-24 21:57:49,397 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-24 21:57:49,397 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:57:49,397 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 21:57:49,397 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 21:57:49,397 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-11-24 21:57:49,398 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-11-24 21:57:49,398 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-11-24 21:57:49,399 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-11-24 21:57:49,399 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-11-24 21:57:49,399 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-11-24 21:57:49,400 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2023-11-24 21:57:49,400 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2023-11-24 21:57:49,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 21:57:49,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-24 21:57:49,401 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-24 21:57:49,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-24 21:57:49,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-24 21:57:49,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-24 21:57:49,403 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-24 21:57:49,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:57:49,403 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:57:49,405 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-24 21:57:49,656 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:57:49,658 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:57:50,372 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:57:50,984 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:57:50,984 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-24 21:57:50,985 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:57:50 BoogieIcfgContainer [2023-11-24 21:57:50,985 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:57:50,989 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:57:50,990 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:57:50,993 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:57:50,993 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:57:48" (1/3) ... [2023-11-24 21:57:50,994 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18dc9f8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:57:50, skipping insertion in model container [2023-11-24 21:57:50,994 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:57:49" (2/3) ... [2023-11-24 21:57:50,996 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18dc9f8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:57:50, skipping insertion in model container [2023-11-24 21:57:50,996 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:57:50" (3/3) ... [2023-11-24 21:57:50,999 INFO L112 eAbstractionObserver]: Analyzing ICFG safe019_rmo.oepc.i [2023-11-24 21:57:51,022 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:57:51,040 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 52 error locations. [2023-11-24 21:57:51,040 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-24 21:57:51,181 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-24 21:57:51,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 115 places, 104 transitions, 224 flow [2023-11-24 21:57:51,314 INFO L124 PetriNetUnfolderBase]: 2/100 cut-off events. [2023-11-24 21:57:51,314 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:57:51,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113 conditions, 100 events. 2/100 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 352 event pairs, 0 based on Foata normal form. 0/46 useless extension candidates. Maximal degree in co-relation 101. Up to 2 conditions per place. [2023-11-24 21:57:51,322 INFO L82 GeneralOperation]: Start removeDead. Operand has 115 places, 104 transitions, 224 flow [2023-11-24 21:57:51,331 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 111 places, 100 transitions, 212 flow [2023-11-24 21:57:51,351 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:57:51,359 INFO L357 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, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@37f9db78, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:57:51,360 INFO L358 AbstractCegarLoop]: Starting to check reachability of 80 error locations. [2023-11-24 21:57:51,364 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 21:57:51,365 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-24 21:57:51,365 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:57:51,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:57:51,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-24 21:57:51,366 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-24 21:57:51,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:57:51,373 INFO L85 PathProgramCache]: Analyzing trace with hash 25864, now seen corresponding path program 1 times [2023-11-24 21:57:51,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:57:51,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181141109] [2023-11-24 21:57:51,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:51,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:57:51,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:57:51,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:57:51,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:57:51,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181141109] [2023-11-24 21:57:51,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181141109] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:57:51,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:57:51,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:57:51,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611263304] [2023-11-24 21:57:51,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:57:51,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:57:51,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:57:51,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:57:51,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:57:51,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 104 [2023-11-24 21:57:51,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 100 transitions, 212 flow. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:51,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:57:51,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 104 [2023-11-24 21:57:51,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:58:06,262 INFO L124 PetriNetUnfolderBase]: 52175/74417 cut-off events. [2023-11-24 21:58:06,262 INFO L125 PetriNetUnfolderBase]: For 115/115 co-relation queries the response was YES. [2023-11-24 21:58:06,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144062 conditions, 74417 events. 52175/74417 cut-off events. For 115/115 co-relation queries the response was YES. Maximal size of possible extension queue 6760. Compared 638992 event pairs, 45975 based on Foata normal form. 2000/40777 useless extension candidates. Maximal degree in co-relation 144047. Up to 61207 conditions per place. [2023-11-24 21:58:06,923 INFO L140 encePairwiseOnDemand]: 79/104 looper letters, 69 selfloop transitions, 2 changer transitions 0/99 dead transitions. [2023-11-24 21:58:06,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 99 transitions, 352 flow [2023-11-24 21:58:06,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:58:06,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:58:06,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 200 transitions. [2023-11-24 21:58:06,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6410256410256411 [2023-11-24 21:58:06,940 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 200 transitions. [2023-11-24 21:58:06,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 200 transitions. [2023-11-24 21:58:06,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:58:06,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 200 transitions. [2023-11-24 21:58:06,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 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) [2023-11-24 21:58:06,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 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) [2023-11-24 21:58:06,956 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 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) [2023-11-24 21:58:06,958 INFO L175 Difference]: Start difference. First operand has 111 places, 100 transitions, 212 flow. Second operand 3 states and 200 transitions. [2023-11-24 21:58:06,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 99 transitions, 352 flow [2023-11-24 21:58:06,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 99 transitions, 348 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-24 21:58:06,975 INFO L231 Difference]: Finished difference. Result has 87 places, 76 transitions, 164 flow [2023-11-24 21:58:06,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=85, 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=164, PETRI_PLACES=87, PETRI_TRANSITIONS=76} [2023-11-24 21:58:06,981 INFO L281 CegarLoopForPetriNet]: 111 programPoint places, -24 predicate places. [2023-11-24 21:58:06,982 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 76 transitions, 164 flow [2023-11-24 21:58:06,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:06,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:58:06,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-24 21:58:06,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 21:58:06,983 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-24 21:58:06,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:06,984 INFO L85 PathProgramCache]: Analyzing trace with hash 25865, now seen corresponding path program 1 times [2023-11-24 21:58:06,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:06,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727191738] [2023-11-24 21:58:06,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:06,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:07,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:07,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:58:07,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:07,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727191738] [2023-11-24 21:58:07,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727191738] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:58:07,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:58:07,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:58:07,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508582009] [2023-11-24 21:58:07,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:58:07,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:58:07,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:07,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:58:07,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:58:07,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 104 [2023-11-24 21:58:07,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 76 transitions, 164 flow. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 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) [2023-11-24 21:58:07,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:58:07,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 104 [2023-11-24 21:58:07,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:58:18,300 INFO L124 PetriNetUnfolderBase]: 52175/74416 cut-off events. [2023-11-24 21:58:18,300 INFO L125 PetriNetUnfolderBase]: For 1000/1000 co-relation queries the response was YES. [2023-11-24 21:58:18,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145058 conditions, 74416 events. 52175/74416 cut-off events. For 1000/1000 co-relation queries the response was YES. Maximal size of possible extension queue 6760. Compared 638971 event pairs, 45975 based on Foata normal form. 1/38777 useless extension candidates. Maximal degree in co-relation 145047. Up to 61206 conditions per place. [2023-11-24 21:58:18,875 INFO L140 encePairwiseOnDemand]: 101/104 looper letters, 68 selfloop transitions, 2 changer transitions 0/98 dead transitions. [2023-11-24 21:58:18,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 98 transitions, 348 flow [2023-11-24 21:58:18,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:58:18,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:58:18,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 170 transitions. [2023-11-24 21:58:18,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5448717948717948 [2023-11-24 21:58:18,886 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 170 transitions. [2023-11-24 21:58:18,887 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 170 transitions. [2023-11-24 21:58:18,888 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:58:18,888 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 170 transitions. [2023-11-24 21:58:18,894 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 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) [2023-11-24 21:58:18,897 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 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) [2023-11-24 21:58:18,899 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 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) [2023-11-24 21:58:18,899 INFO L175 Difference]: Start difference. First operand has 87 places, 76 transitions, 164 flow. Second operand 3 states and 170 transitions. [2023-11-24 21:58:18,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 98 transitions, 348 flow [2023-11-24 21:58:19,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 98 transitions, 344 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:58:19,209 INFO L231 Difference]: Finished difference. Result has 86 places, 75 transitions, 162 flow [2023-11-24 21:58:19,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=162, PETRI_PLACES=86, PETRI_TRANSITIONS=75} [2023-11-24 21:58:19,211 INFO L281 CegarLoopForPetriNet]: 111 programPoint places, -25 predicate places. [2023-11-24 21:58:19,211 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 75 transitions, 162 flow [2023-11-24 21:58:19,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 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) [2023-11-24 21:58:19,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:58:19,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 21:58:19,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 21:58:19,213 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-24 21:58:19,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:19,213 INFO L85 PathProgramCache]: Analyzing trace with hash 771388653, now seen corresponding path program 1 times [2023-11-24 21:58:19,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:19,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17468062] [2023-11-24 21:58:19,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:19,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:19,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:19,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:58:19,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:19,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17468062] [2023-11-24 21:58:19,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17468062] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:58:19,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:58:19,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:58:19,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230015110] [2023-11-24 21:58:19,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:58:19,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:58:19,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:19,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:58:19,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:58:19,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 104 [2023-11-24 21:58:19,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 75 transitions, 162 flow. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 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) [2023-11-24 21:58:19,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:58:19,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 104 [2023-11-24 21:58:19,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:58:29,601 INFO L124 PetriNetUnfolderBase]: 52179/74217 cut-off events. [2023-11-24 21:58:29,601 INFO L125 PetriNetUnfolderBase]: For 1000/1000 co-relation queries the response was YES. [2023-11-24 21:58:29,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144868 conditions, 74217 events. 52179/74217 cut-off events. For 1000/1000 co-relation queries the response was YES. Maximal size of possible extension queue 6759. Compared 634619 event pairs, 46175 based on Foata normal form. 0/38586 useless extension candidates. Maximal degree in co-relation 144857. Up to 61209 conditions per place. [2023-11-24 21:58:30,147 INFO L140 encePairwiseOnDemand]: 101/104 looper letters, 69 selfloop transitions, 2 changer transitions 0/97 dead transitions. [2023-11-24 21:58:30,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 97 transitions, 348 flow [2023-11-24 21:58:30,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:58:30,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:58:30,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 168 transitions. [2023-11-24 21:58:30,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5384615384615384 [2023-11-24 21:58:30,150 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 168 transitions. [2023-11-24 21:58:30,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 168 transitions. [2023-11-24 21:58:30,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:58:30,150 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 168 transitions. [2023-11-24 21:58:30,151 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 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) [2023-11-24 21:58:30,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 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) [2023-11-24 21:58:30,153 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 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) [2023-11-24 21:58:30,153 INFO L175 Difference]: Start difference. First operand has 86 places, 75 transitions, 162 flow. Second operand 3 states and 168 transitions. [2023-11-24 21:58:30,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 97 transitions, 348 flow [2023-11-24 21:58:30,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 97 transitions, 344 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:58:30,430 INFO L231 Difference]: Finished difference. Result has 85 places, 74 transitions, 160 flow [2023-11-24 21:58:30,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=160, PETRI_PLACES=85, PETRI_TRANSITIONS=74} [2023-11-24 21:58:30,433 INFO L281 CegarLoopForPetriNet]: 111 programPoint places, -26 predicate places. [2023-11-24 21:58:30,433 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 74 transitions, 160 flow [2023-11-24 21:58:30,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 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) [2023-11-24 21:58:30,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:58:30,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 21:58:30,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 21:58:30,435 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-24 21:58:30,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:30,436 INFO L85 PathProgramCache]: Analyzing trace with hash 771388654, now seen corresponding path program 1 times [2023-11-24 21:58:30,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:30,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075793433] [2023-11-24 21:58:30,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:30,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:30,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:30,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:58:30,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:30,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075793433] [2023-11-24 21:58:30,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075793433] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:58:30,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:58:30,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:58:30,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406807474] [2023-11-24 21:58:30,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:58:30,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:58:30,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:30,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:58:30,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:58:30,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 104 [2023-11-24 21:58:30,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 74 transitions, 160 flow. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 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) [2023-11-24 21:58:30,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:58:30,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 104 [2023-11-24 21:58:30,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand