./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-ext/18_read_write_lock-pthread.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 527bcce2 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_ba45e956-f779-4a86-81cc-5beda28679ba/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba45e956-f779-4a86-81cc-5beda28679ba/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba45e956-f779-4a86-81cc-5beda28679ba/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba45e956-f779-4a86-81cc-5beda28679ba/bin/uautomizer-verify-bycVGegfSx/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-ext/18_read_write_lock-pthread.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba45e956-f779-4a86-81cc-5beda28679ba/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba45e956-f779-4a86-81cc-5beda28679ba/bin/uautomizer-verify-bycVGegfSx --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 640f2537ee1134d51aea0c08ed10cc1d89c2a65b937ff07b07bc614e0b9289fc --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 22:27:21,129 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 22:27:21,285 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba45e956-f779-4a86-81cc-5beda28679ba/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-21 22:27:21,295 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 22:27:21,296 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 22:27:21,341 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 22:27:21,342 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 22:27:21,342 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 22:27:21,344 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 22:27:21,350 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 22:27:21,351 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 22:27:21,352 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 22:27:21,352 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 22:27:21,355 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 22:27:21,355 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 22:27:21,356 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 22:27:21,356 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 22:27:21,357 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 22:27:21,357 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-21 22:27:21,358 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-21 22:27:21,358 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-21 22:27:21,359 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 22:27:21,360 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-21 22:27:21,360 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-21 22:27:21,361 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 22:27:21,361 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 22:27:21,362 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 22:27:21,363 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 22:27:21,364 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 22:27:21,364 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 22:27:21,366 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:27:21,367 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 22:27:21,367 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 22:27:21,367 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 22:27:21,368 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 22:27:21,368 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 22:27:21,368 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 22:27:21,369 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 22:27:21,369 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 22:27:21,369 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_ba45e956-f779-4a86-81cc-5beda28679ba/bin/uautomizer-verify-bycVGegfSx/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba45e956-f779-4a86-81cc-5beda28679ba/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 640f2537ee1134d51aea0c08ed10cc1d89c2a65b937ff07b07bc614e0b9289fc [2023-11-21 22:27:21,712 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 22:27:21,751 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 22:27:21,790 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 22:27:21,792 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 22:27:21,792 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 22:27:21,794 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba45e956-f779-4a86-81cc-5beda28679ba/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/pthread-ext/18_read_write_lock-pthread.i [2023-11-21 22:27:25,293 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 22:27:25,551 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 22:27:25,552 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba45e956-f779-4a86-81cc-5beda28679ba/sv-benchmarks/c/pthread-ext/18_read_write_lock-pthread.i [2023-11-21 22:27:25,570 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba45e956-f779-4a86-81cc-5beda28679ba/bin/uautomizer-verify-bycVGegfSx/data/85615db99/924d6e1a95e640778c62cdf285043ba5/FLAG8d0842bfc [2023-11-21 22:27:25,587 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba45e956-f779-4a86-81cc-5beda28679ba/bin/uautomizer-verify-bycVGegfSx/data/85615db99/924d6e1a95e640778c62cdf285043ba5 [2023-11-21 22:27:25,590 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 22:27:25,592 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 22:27:25,593 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 22:27:25,594 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 22:27:25,600 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 22:27:25,601 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:27:25" (1/1) ... [2023-11-21 22:27:25,603 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@612cbe51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:27:25, skipping insertion in model container [2023-11-21 22:27:25,603 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:27:25" (1/1) ... [2023-11-21 22:27:25,687 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 22:27:26,197 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:27:26,221 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 22:27:26,286 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:27:26,329 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 22:27:26,329 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 22:27:26,338 INFO L206 MainTranslator]: Completed translation [2023-11-21 22:27:26,339 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:27:26 WrapperNode [2023-11-21 22:27:26,339 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 22:27:26,340 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 22:27:26,341 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 22:27:26,341 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 22:27:26,349 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:27:26" (1/1) ... [2023-11-21 22:27:26,387 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:27:26" (1/1) ... [2023-11-21 22:27:26,414 INFO L138 Inliner]: procedures = 166, calls = 37, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 66 [2023-11-21 22:27:26,415 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 22:27:26,415 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 22:27:26,416 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 22:27:26,416 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 22:27:26,426 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:27:26" (1/1) ... [2023-11-21 22:27:26,426 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:27:26" (1/1) ... [2023-11-21 22:27:26,429 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:27:26" (1/1) ... [2023-11-21 22:27:26,430 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:27:26" (1/1) ... [2023-11-21 22:27:26,445 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:27:26" (1/1) ... [2023-11-21 22:27:26,446 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:27:26" (1/1) ... [2023-11-21 22:27:26,449 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:27:26" (1/1) ... [2023-11-21 22:27:26,450 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:27:26" (1/1) ... [2023-11-21 22:27:26,454 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 22:27:26,455 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 22:27:26,455 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 22:27:26,455 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 22:27:26,456 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:27:26" (1/1) ... [2023-11-21 22:27:26,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:27:26,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba45e956-f779-4a86-81cc-5beda28679ba/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:27:26,504 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba45e956-f779-4a86-81cc-5beda28679ba/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 22:27:26,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba45e956-f779-4a86-81cc-5beda28679ba/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 22:27:26,552 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsRwLockUnlock [2023-11-21 22:27:26,552 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-21 22:27:26,553 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-21 22:27:26,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-21 22:27:26,553 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsRwLockReadLock [2023-11-21 22:27:26,553 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-21 22:27:26,554 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 22:27:26,554 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-21 22:27:26,554 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsRwLockWriteLock [2023-11-21 22:27:26,554 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 22:27:26,554 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-21 22:27:26,554 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-21 22:27:26,555 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 22:27:26,555 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 22:27:26,556 WARN L212 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-21 22:27:26,706 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 22:27:26,708 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 22:27:26,948 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 22:27:27,163 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 22:27:27,164 INFO L308 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-21 22:27:27,174 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:27:27 BoogieIcfgContainer [2023-11-21 22:27:27,174 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 22:27:27,178 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 22:27:27,178 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 22:27:27,184 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 22:27:27,185 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 10:27:25" (1/3) ... [2023-11-21 22:27:27,186 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ba5b4c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:27:27, skipping insertion in model container [2023-11-21 22:27:27,187 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:27:26" (2/3) ... [2023-11-21 22:27:27,187 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ba5b4c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:27:27, skipping insertion in model container [2023-11-21 22:27:27,188 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:27:27" (3/3) ... [2023-11-21 22:27:27,191 INFO L112 eAbstractionObserver]: Analyzing ICFG 18_read_write_lock-pthread.i [2023-11-21 22:27:27,213 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 22:27:27,213 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2023-11-21 22:27:27,213 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-21 22:27:27,297 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-21 22:27:27,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 31 places, 29 transitions, 62 flow [2023-11-21 22:27:27,423 INFO L124 PetriNetUnfolderBase]: 2/28 cut-off events. [2023-11-21 22:27:27,423 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-21 22:27:27,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32 conditions, 28 events. 2/28 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 27 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 23. Up to 2 conditions per place. [2023-11-21 22:27:27,428 INFO L82 GeneralOperation]: Start removeDead. Operand has 31 places, 29 transitions, 62 flow [2023-11-21 22:27:27,433 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 29 places, 27 transitions, 57 flow [2023-11-21 22:27:27,445 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 22:27:27,455 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;@3ca61fd6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 22:27:27,455 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-21 22:27:27,461 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-21 22:27:27,461 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-21 22:27:27,461 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-21 22:27:27,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:27:27,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-21 22:27:27,463 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 2 more)] === [2023-11-21 22:27:27,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:27:27,470 INFO L85 PathProgramCache]: Analyzing trace with hash 6644, now seen corresponding path program 1 times [2023-11-21 22:27:27,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:27:27,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430027270] [2023-11-21 22:27:27,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:27:27,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:27:27,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:27:27,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:27:27,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:27:27,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430027270] [2023-11-21 22:27:27,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430027270] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:27:27,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:27:27,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 22:27:27,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602717690] [2023-11-21 22:27:27,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:27:27,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:27:27,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:27:27,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:27:27,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:27:27,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 29 [2023-11-21 22:27:27,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 27 transitions, 57 flow. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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) [2023-11-21 22:27:27,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:27:27,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 29 [2023-11-21 22:27:27,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:27:28,019 INFO L124 PetriNetUnfolderBase]: 20/75 cut-off events. [2023-11-21 22:27:28,020 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-21 22:27:28,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132 conditions, 75 events. 20/75 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 217 event pairs, 16 based on Foata normal form. 9/77 useless extension candidates. Maximal degree in co-relation 120. Up to 43 conditions per place. [2023-11-21 22:27:28,039 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 14 selfloop transitions, 2 changer transitions 0/27 dead transitions. [2023-11-21 22:27:28,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 27 transitions, 89 flow [2023-11-21 22:27:28,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:27:28,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:27:28,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 55 transitions. [2023-11-21 22:27:28,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.632183908045977 [2023-11-21 22:27:28,059 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 55 transitions. [2023-11-21 22:27:28,060 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 55 transitions. [2023-11-21 22:27:28,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:27:28,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 55 transitions. [2023-11-21 22:27:28,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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) [2023-11-21 22:27:28,075 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 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) [2023-11-21 22:27:28,076 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 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) [2023-11-21 22:27:28,078 INFO L175 Difference]: Start difference. First operand has 29 places, 27 transitions, 57 flow. Second operand 3 states and 55 transitions. [2023-11-21 22:27:28,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 27 transitions, 89 flow [2023-11-21 22:27:28,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 27 transitions, 88 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 22:27:28,084 INFO L231 Difference]: Finished difference. Result has 28 places, 23 transitions, 52 flow [2023-11-21 22:27:28,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=52, PETRI_PLACES=28, PETRI_TRANSITIONS=23} [2023-11-21 22:27:28,092 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -1 predicate places. [2023-11-21 22:27:28,092 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 23 transitions, 52 flow [2023-11-21 22:27:28,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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) [2023-11-21 22:27:28,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:27:28,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-21 22:27:28,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 22:27:28,094 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 2 more)] === [2023-11-21 22:27:28,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:27:28,095 INFO L85 PathProgramCache]: Analyzing trace with hash 6645, now seen corresponding path program 1 times [2023-11-21 22:27:28,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:27:28,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473333799] [2023-11-21 22:27:28,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:27:28,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:27:28,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:27:28,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:27:28,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:27:28,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473333799] [2023-11-21 22:27:28,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473333799] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:27:28,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:27:28,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 22:27:28,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007483814] [2023-11-21 22:27:28,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:27:28,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:27:28,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:27:28,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:27:28,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:27:28,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 29 [2023-11-21 22:27:28,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 23 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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) [2023-11-21 22:27:28,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:27:28,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 29 [2023-11-21 22:27:28,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:27:28,339 INFO L124 PetriNetUnfolderBase]: 20/74 cut-off events. [2023-11-21 22:27:28,340 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-21 22:27:28,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136 conditions, 74 events. 20/74 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 214 event pairs, 16 based on Foata normal form. 1/68 useless extension candidates. Maximal degree in co-relation 125. Up to 42 conditions per place. [2023-11-21 22:27:28,342 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 13 selfloop transitions, 2 changer transitions 0/26 dead transitions. [2023-11-21 22:27:28,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 26 transitions, 88 flow [2023-11-21 22:27:28,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:27:28,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:27:28,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 55 transitions. [2023-11-21 22:27:28,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.632183908045977 [2023-11-21 22:27:28,345 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 55 transitions. [2023-11-21 22:27:28,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 55 transitions. [2023-11-21 22:27:28,346 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:27:28,347 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 55 transitions. [2023-11-21 22:27:28,348 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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) [2023-11-21 22:27:28,351 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 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) [2023-11-21 22:27:28,355 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 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) [2023-11-21 22:27:28,356 INFO L175 Difference]: Start difference. First operand has 28 places, 23 transitions, 52 flow. Second operand 3 states and 55 transitions. [2023-11-21 22:27:28,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 26 transitions, 88 flow [2023-11-21 22:27:28,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 26 transitions, 84 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-21 22:27:28,360 INFO L231 Difference]: Finished difference. Result has 27 places, 22 transitions, 50 flow [2023-11-21 22:27:28,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=27, PETRI_TRANSITIONS=22} [2023-11-21 22:27:28,365 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -2 predicate places. [2023-11-21 22:27:28,365 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 22 transitions, 50 flow [2023-11-21 22:27:28,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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) [2023-11-21 22:27:28,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:27:28,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:27:28,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-21 22:27:28,369 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 2 more)] === [2023-11-21 22:27:28,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:27:28,374 INFO L85 PathProgramCache]: Analyzing trace with hash 2112609504, now seen corresponding path program 1 times [2023-11-21 22:27:28,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:27:28,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530132662] [2023-11-21 22:27:28,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:27:28,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:27:28,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:27:28,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:27:28,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:27:28,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530132662] [2023-11-21 22:27:28,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530132662] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:27:28,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:27:28,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 22:27:28,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074966578] [2023-11-21 22:27:28,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:27:28,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 22:27:28,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:27:28,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 22:27:28,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-21 22:27:28,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 29 [2023-11-21 22:27:28,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 22 transitions, 50 flow. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 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) [2023-11-21 22:27:28,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:27:28,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 29 [2023-11-21 22:27:28,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:27:28,932 INFO L124 PetriNetUnfolderBase]: 51/144 cut-off events. [2023-11-21 22:27:28,932 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-21 22:27:28,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 287 conditions, 144 events. 51/144 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 515 event pairs, 7 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 276. Up to 47 conditions per place. [2023-11-21 22:27:28,938 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 32 selfloop transitions, 13 changer transitions 0/51 dead transitions. [2023-11-21 22:27:28,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 51 transitions, 200 flow [2023-11-21 22:27:28,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 22:27:28,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-21 22:27:28,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2023-11-21 22:27:28,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5129310344827587 [2023-11-21 22:27:28,946 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 119 transitions. [2023-11-21 22:27:28,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 119 transitions. [2023-11-21 22:27:28,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:27:28,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 119 transitions. [2023-11-21 22:27:28,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 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) [2023-11-21 22:27:28,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 29.0) internal successors, (261), 9 states have internal predecessors, (261), 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) [2023-11-21 22:27:28,956 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 29.0) internal successors, (261), 9 states have internal predecessors, (261), 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) [2023-11-21 22:27:28,956 INFO L175 Difference]: Start difference. First operand has 27 places, 22 transitions, 50 flow. Second operand 8 states and 119 transitions. [2023-11-21 22:27:28,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 51 transitions, 200 flow [2023-11-21 22:27:28,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 51 transitions, 194 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-21 22:27:28,964 INFO L231 Difference]: Finished difference. Result has 38 places, 31 transitions, 124 flow [2023-11-21 22:27:28,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=124, PETRI_PLACES=38, PETRI_TRANSITIONS=31} [2023-11-21 22:27:28,966 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 9 predicate places. [2023-11-21 22:27:28,966 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 31 transitions, 124 flow [2023-11-21 22:27:28,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 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) [2023-11-21 22:27:28,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:27:28,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:27:28,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-21 22:27:28,968 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 2 more)] === [2023-11-21 22:27:28,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:27:28,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1066342424, now seen corresponding path program 1 times [2023-11-21 22:27:28,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:27:28,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066774601] [2023-11-21 22:27:28,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:27:28,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:27:29,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:27:29,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:27:29,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:27:29,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066774601] [2023-11-21 22:27:29,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066774601] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:27:29,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:27:29,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:27:29,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516016005] [2023-11-21 22:27:29,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:27:29,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:27:29,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:27:29,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:27:29,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:27:29,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 29 [2023-11-21 22:27:29,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 31 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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) [2023-11-21 22:27:29,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:27:29,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 29 [2023-11-21 22:27:29,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:27:29,281 INFO L124 PetriNetUnfolderBase]: 7/63 cut-off events. [2023-11-21 22:27:29,281 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2023-11-21 22:27:29,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157 conditions, 63 events. 7/63 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 197 event pairs, 4 based on Foata normal form. 13/75 useless extension candidates. Maximal degree in co-relation 140. Up to 16 conditions per place. [2023-11-21 22:27:29,282 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 7 selfloop transitions, 1 changer transitions 11/29 dead transitions. [2023-11-21 22:27:29,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 29 transitions, 144 flow [2023-11-21 22:27:29,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:27:29,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:27:29,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 56 transitions. [2023-11-21 22:27:29,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6436781609195402 [2023-11-21 22:27:29,287 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 56 transitions. [2023-11-21 22:27:29,288 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 56 transitions. [2023-11-21 22:27:29,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:27:29,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 56 transitions. [2023-11-21 22:27:29,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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) [2023-11-21 22:27:29,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 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) [2023-11-21 22:27:29,292 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 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) [2023-11-21 22:27:29,292 INFO L175 Difference]: Start difference. First operand has 38 places, 31 transitions, 124 flow. Second operand 3 states and 56 transitions. [2023-11-21 22:27:29,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 29 transitions, 144 flow [2023-11-21 22:27:29,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 29 transitions, 144 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-21 22:27:29,302 INFO L231 Difference]: Finished difference. Result has 38 places, 18 transitions, 71 flow [2023-11-21 22:27:29,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=71, PETRI_PLACES=38, PETRI_TRANSITIONS=18} [2023-11-21 22:27:29,304 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 9 predicate places. [2023-11-21 22:27:29,305 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 18 transitions, 71 flow [2023-11-21 22:27:29,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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) [2023-11-21 22:27:29,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:27:29,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:27:29,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-21 22:27:29,307 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 2 more)] === [2023-11-21 22:27:29,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:27:29,310 INFO L85 PathProgramCache]: Analyzing trace with hash 288299701, now seen corresponding path program 1 times [2023-11-21 22:27:29,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:27:29,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074938587] [2023-11-21 22:27:29,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:27:29,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:27:29,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:27:29,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:27:29,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:27:29,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074938587] [2023-11-21 22:27:29,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074938587] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:27:29,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:27:29,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:27:29,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563598623] [2023-11-21 22:27:29,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:27:29,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:27:29,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:27:29,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:27:29,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:27:29,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 29 [2023-11-21 22:27:29,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 18 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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) [2023-11-21 22:27:29,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:27:29,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 29 [2023-11-21 22:27:29,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:27:29,516 INFO L124 PetriNetUnfolderBase]: 1/13 cut-off events. [2023-11-21 22:27:29,516 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-21 22:27:29,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41 conditions, 13 events. 1/13 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 8 event pairs, 0 based on Foata normal form. 1/13 useless extension candidates. Maximal degree in co-relation 31. Up to 5 conditions per place. [2023-11-21 22:27:29,517 INFO L140 encePairwiseOnDemand]: 27/29 looper letters, 0 selfloop transitions, 0 changer transitions 12/12 dead transitions. [2023-11-21 22:27:29,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 12 transitions, 55 flow [2023-11-21 22:27:29,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:27:29,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:27:29,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 49 transitions. [2023-11-21 22:27:29,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5632183908045977 [2023-11-21 22:27:29,528 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 49 transitions. [2023-11-21 22:27:29,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 49 transitions. [2023-11-21 22:27:29,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:27:29,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 49 transitions. [2023-11-21 22:27:29,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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) [2023-11-21 22:27:29,531 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 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) [2023-11-21 22:27:29,532 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 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) [2023-11-21 22:27:29,532 INFO L175 Difference]: Start difference. First operand has 38 places, 18 transitions, 71 flow. Second operand 3 states and 49 transitions. [2023-11-21 22:27:29,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 12 transitions, 55 flow [2023-11-21 22:27:29,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 12 transitions, 44 flow, removed 1 selfloop flow, removed 7 redundant places. [2023-11-21 22:27:29,534 INFO L231 Difference]: Finished difference. Result has 22 places, 0 transitions, 0 flow [2023-11-21 22:27:29,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=30, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=22, PETRI_TRANSITIONS=0} [2023-11-21 22:27:29,537 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-11-21 22:27:29,539 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 0 transitions, 0 flow [2023-11-21 22:27:29,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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) [2023-11-21 22:27:29,542 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 5 remaining) [2023-11-21 22:27:29,543 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 5 remaining) [2023-11-21 22:27:29,545 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (2 of 5 remaining) [2023-11-21 22:27:29,545 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (1 of 5 remaining) [2023-11-21 22:27:29,545 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 5 remaining) [2023-11-21 22:27:29,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-21 22:27:29,546 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-11-21 22:27:29,557 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-21 22:27:29,558 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-21 22:27:29,572 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.11 10:27:29 BasicIcfg [2023-11-21 22:27:29,572 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-21 22:27:29,573 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-21 22:27:29,573 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-21 22:27:29,574 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-21 22:27:29,575 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:27:27" (3/4) ... [2023-11-21 22:27:29,577 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-21 22:27:29,582 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thr1 [2023-11-21 22:27:29,592 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 33 nodes and edges [2023-11-21 22:27:29,592 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2023-11-21 22:27:29,592 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2023-11-21 22:27:29,593 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-11-21 22:27:29,715 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba45e956-f779-4a86-81cc-5beda28679ba/bin/uautomizer-verify-bycVGegfSx/witness.graphml [2023-11-21 22:27:29,716 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba45e956-f779-4a86-81cc-5beda28679ba/bin/uautomizer-verify-bycVGegfSx/witness.yml [2023-11-21 22:27:29,716 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-21 22:27:29,717 INFO L158 Benchmark]: Toolchain (without parser) took 4125.39ms. Allocated memory is still 159.4MB. Free memory was 118.8MB in the beginning and 80.7MB in the end (delta: 38.1MB). Peak memory consumption was 40.8MB. Max. memory is 16.1GB. [2023-11-21 22:27:29,717 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 159.4MB. Free memory is still 135.1MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-21 22:27:29,718 INFO L158 Benchmark]: CACSL2BoogieTranslator took 746.46ms. Allocated memory is still 159.4MB. Free memory was 118.8MB in the beginning and 99.0MB in the end (delta: 19.8MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2023-11-21 22:27:29,718 INFO L158 Benchmark]: Boogie Procedure Inliner took 74.36ms. Allocated memory is still 159.4MB. Free memory was 99.0MB in the beginning and 96.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-21 22:27:29,719 INFO L158 Benchmark]: Boogie Preprocessor took 38.43ms. Allocated memory is still 159.4MB. Free memory was 96.9MB in the beginning and 95.4MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-21 22:27:29,719 INFO L158 Benchmark]: RCFGBuilder took 720.00ms. Allocated memory is still 159.4MB. Free memory was 95.4MB in the beginning and 69.3MB in the end (delta: 26.1MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. [2023-11-21 22:27:29,720 INFO L158 Benchmark]: TraceAbstraction took 2394.97ms. Allocated memory is still 159.4MB. Free memory was 68.6MB in the beginning and 84.9MB in the end (delta: -16.3MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-21 22:27:29,720 INFO L158 Benchmark]: Witness Printer took 142.95ms. Allocated memory is still 159.4MB. Free memory was 84.9MB in the beginning and 80.7MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-21 22:27:29,723 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 159.4MB. Free memory is still 135.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 746.46ms. Allocated memory is still 159.4MB. Free memory was 118.8MB in the beginning and 99.0MB in the end (delta: 19.8MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 74.36ms. Allocated memory is still 159.4MB. Free memory was 99.0MB in the beginning and 96.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 38.43ms. Allocated memory is still 159.4MB. Free memory was 96.9MB in the beginning and 95.4MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 720.00ms. Allocated memory is still 159.4MB. Free memory was 95.4MB in the beginning and 69.3MB in the end (delta: 26.1MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. * TraceAbstraction took 2394.97ms. Allocated memory is still 159.4MB. Free memory was 68.6MB in the beginning and 84.9MB in the end (delta: -16.3MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 142.95ms. Allocated memory is still 159.4MB. Free memory was 84.9MB in the beginning and 80.7MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 12]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 713]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 35 locations, 5 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 2.2s, OverallIterations: 5, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 76 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 61 mSDsluCounter, 8 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 4 mSDsCounter, 5 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 203 IncrementalHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 5 mSolverCounterUnsat, 4 mSDtfsCounter, 203 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=124occurred in iteration=3, InterpolantAutomatonStates: 20, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 47 NumberOfCodeBlocks, 47 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 42 ConstructedInterpolants, 0 QuantifiedInterpolants, 120 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 4 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-11-21 22:27:29,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba45e956-f779-4a86-81cc-5beda28679ba/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE