./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-ext/18_read_write_lock.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9bd2c7ff 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_25d482f0-92c3-4bcc-b554-a071b7cb9256/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d482f0-92c3-4bcc-b554-a071b7cb9256/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d482f0-92c3-4bcc-b554-a071b7cb9256/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d482f0-92c3-4bcc-b554-a071b7cb9256/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-ext/18_read_write_lock.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d482f0-92c3-4bcc-b554-a071b7cb9256/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d482f0-92c3-4bcc-b554-a071b7cb9256/bin/uautomizer-verify-uCwYo4JHxu --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 72289b7b84ec29dc48aff6fa2f8d521998f594af518139867a01f104107e1865 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:42:02,060 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:42:02,187 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d482f0-92c3-4bcc-b554-a071b7cb9256/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-19 07:42:02,199 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:42:02,200 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:42:02,241 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:42:02,243 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:42:02,244 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:42:02,245 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:42:02,250 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:42:02,251 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:42:02,252 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:42:02,253 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:42:02,255 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:42:02,255 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:42:02,256 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:42:02,256 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:42:02,257 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:42:02,257 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-19 07:42:02,258 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-19 07:42:02,259 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-19 07:42:02,259 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:42:02,260 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 07:42:02,260 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 07:42:02,261 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:42:02,261 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:42:02,262 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:42:02,263 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:42:02,263 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:42:02,264 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:42:02,265 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:42:02,266 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:42:02,266 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:42:02,266 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:42:02,266 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:42:02,267 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:42:02,267 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:42:02,267 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:42:02,268 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_25d482f0-92c3-4bcc-b554-a071b7cb9256/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d482f0-92c3-4bcc-b554-a071b7cb9256/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 72289b7b84ec29dc48aff6fa2f8d521998f594af518139867a01f104107e1865 [2023-11-19 07:42:02,549 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:42:02,583 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:42:02,587 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:42:02,588 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:42:02,589 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:42:02,591 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d482f0-92c3-4bcc-b554-a071b7cb9256/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/pthread-ext/18_read_write_lock.i [2023-11-19 07:42:05,664 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:42:06,020 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:42:06,021 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d482f0-92c3-4bcc-b554-a071b7cb9256/sv-benchmarks/c/pthread-ext/18_read_write_lock.i [2023-11-19 07:42:06,037 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d482f0-92c3-4bcc-b554-a071b7cb9256/bin/uautomizer-verify-uCwYo4JHxu/data/2602e3549/9e5c97c944944f5b80126f216b735463/FLAGa02627464 [2023-11-19 07:42:06,061 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d482f0-92c3-4bcc-b554-a071b7cb9256/bin/uautomizer-verify-uCwYo4JHxu/data/2602e3549/9e5c97c944944f5b80126f216b735463 [2023-11-19 07:42:06,068 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:42:06,071 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:42:06,074 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:42:06,075 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:42:06,080 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:42:06,081 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:42:06" (1/1) ... [2023-11-19 07:42:06,082 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61f3e1e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:06, skipping insertion in model container [2023-11-19 07:42:06,083 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:42:06" (1/1) ... [2023-11-19 07:42:06,129 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:42:06,308 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-19 07:42:06,480 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:42:06,492 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:42:06,520 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-19 07:42:06,568 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:42:06,613 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:42:06,614 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:42:06,614 WARN L675 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:42:06,622 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:42:06,623 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:06 WrapperNode [2023-11-19 07:42:06,623 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:42:06,624 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:42:06,624 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:42:06,625 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:42:06,634 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:06" (1/1) ... [2023-11-19 07:42:06,671 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:06" (1/1) ... [2023-11-19 07:42:06,704 INFO L138 Inliner]: procedures = 174, calls = 33, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 80 [2023-11-19 07:42:06,704 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:42:06,705 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:42:06,705 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:42:06,706 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:42:06,715 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:06" (1/1) ... [2023-11-19 07:42:06,716 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:06" (1/1) ... [2023-11-19 07:42:06,725 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:06" (1/1) ... [2023-11-19 07:42:06,726 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:06" (1/1) ... [2023-11-19 07:42:06,738 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:06" (1/1) ... [2023-11-19 07:42:06,741 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:06" (1/1) ... [2023-11-19 07:42:06,742 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:06" (1/1) ... [2023-11-19 07:42:06,750 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:06" (1/1) ... [2023-11-19 07:42:06,757 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:42:06,758 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:42:06,758 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:42:06,759 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:42:06,759 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:06" (1/1) ... [2023-11-19 07:42:06,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:42:06,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d482f0-92c3-4bcc-b554-a071b7cb9256/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:42:06,807 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d482f0-92c3-4bcc-b554-a071b7cb9256/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:42:06,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d482f0-92c3-4bcc-b554-a071b7cb9256/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:42:06,854 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-19 07:42:06,854 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-19 07:42:06,854 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:42:06,854 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-19 07:42:06,855 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:42:06,855 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:42:06,855 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:42:06,855 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:42:06,855 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-19 07:42:06,856 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:42:06,856 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:42:06,859 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 07:42:07,068 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:42:07,071 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:42:07,366 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:42:07,436 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:42:07,436 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-19 07:42:07,440 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:42:07 BoogieIcfgContainer [2023-11-19 07:42:07,440 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:42:07,443 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:42:07,443 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:42:07,447 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:42:07,447 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:42:06" (1/3) ... [2023-11-19 07:42:07,448 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6149bddb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:42:07, skipping insertion in model container [2023-11-19 07:42:07,448 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:06" (2/3) ... [2023-11-19 07:42:07,449 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6149bddb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:42:07, skipping insertion in model container [2023-11-19 07:42:07,449 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:42:07" (3/3) ... [2023-11-19 07:42:07,450 INFO L112 eAbstractionObserver]: Analyzing ICFG 18_read_write_lock.i [2023-11-19 07:42:07,472 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:42:07,472 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2023-11-19 07:42:07,472 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:42:07,512 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 07:42:07,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 64 transitions, 132 flow [2023-11-19 07:42:07,590 INFO L124 PetriNetUnfolderBase]: 2/63 cut-off events. [2023-11-19 07:42:07,590 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:42:07,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67 conditions, 63 events. 2/63 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 38 event pairs, 0 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2023-11-19 07:42:07,596 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 64 transitions, 132 flow [2023-11-19 07:42:07,600 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 60 places, 58 transitions, 119 flow [2023-11-19 07:42:07,605 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:42:07,616 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 60 places, 58 transitions, 119 flow [2023-11-19 07:42:07,619 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 60 places, 58 transitions, 119 flow [2023-11-19 07:42:07,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 60 places, 58 transitions, 119 flow [2023-11-19 07:42:07,637 INFO L124 PetriNetUnfolderBase]: 2/58 cut-off events. [2023-11-19 07:42:07,637 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:42:07,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 58 events. 2/58 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 37 event pairs, 0 based on Foata normal form. 0/53 useless extension candidates. Maximal degree in co-relation 38. Up to 2 conditions per place. [2023-11-19 07:42:07,639 INFO L119 LiptonReduction]: Number of co-enabled transitions 384 [2023-11-19 07:42:09,812 INFO L134 LiptonReduction]: Checked pairs total: 852 [2023-11-19 07:42:09,812 INFO L136 LiptonReduction]: Total number of compositions: 63 [2023-11-19 07:42:09,829 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:42:09,836 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;@6d01e90d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:42:09,836 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-19 07:42:09,838 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:42:09,838 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-11-19 07:42:09,838 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:42:09,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:42:09,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-11-19 07:42:09,840 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 2 more)] === [2023-11-19 07:42:09,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:09,844 INFO L85 PathProgramCache]: Analyzing trace with hash 304, now seen corresponding path program 1 times [2023-11-19 07:42:09,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:09,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430779943] [2023-11-19 07:42:09,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:09,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:09,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:09,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:42:09,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:42:09,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430779943] [2023-11-19 07:42:09,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430779943] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:42:09,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:42:09,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-11-19 07:42:09,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987838336] [2023-11-19 07:42:09,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:42:09,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:42:09,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:42:10,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:42:10,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:42:10,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 127 [2023-11-19 07:42:10,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 16 transitions, 35 flow. Second operand has 2 states, 2 states have (on average 58.5) internal successors, (117), 2 states have internal predecessors, (117), 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) [2023-11-19 07:42:10,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:42:10,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 127 [2023-11-19 07:42:10,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:42:10,048 INFO L124 PetriNetUnfolderBase]: 10/31 cut-off events. [2023-11-19 07:42:10,049 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:42:10,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65 conditions, 31 events. 10/31 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 76 event pairs, 10 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 56. Up to 30 conditions per place. [2023-11-19 07:42:10,050 INFO L140 encePairwiseOnDemand]: 123/127 looper letters, 9 selfloop transitions, 0 changer transitions 0/10 dead transitions. [2023-11-19 07:42:10,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 15 places, 10 transitions, 41 flow [2023-11-19 07:42:10,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:42:10,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-19 07:42:10,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 129 transitions. [2023-11-19 07:42:10,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5078740157480315 [2023-11-19 07:42:10,065 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 129 transitions. [2023-11-19 07:42:10,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 129 transitions. [2023-11-19 07:42:10,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:42:10,070 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 129 transitions. [2023-11-19 07:42:10,073 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 64.5) internal successors, (129), 2 states have internal predecessors, (129), 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) [2023-11-19 07:42:10,078 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 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) [2023-11-19 07:42:10,079 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 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) [2023-11-19 07:42:10,081 INFO L175 Difference]: Start difference. First operand has 18 places, 16 transitions, 35 flow. Second operand 2 states and 129 transitions. [2023-11-19 07:42:10,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 15 places, 10 transitions, 41 flow [2023-11-19 07:42:10,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 14 places, 10 transitions, 40 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:42:10,085 INFO L231 Difference]: Finished difference. Result has 14 places, 10 transitions, 22 flow [2023-11-19 07:42:10,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=22, PETRI_DIFFERENCE_MINUEND_PLACES=13, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=22, PETRI_PLACES=14, PETRI_TRANSITIONS=10} [2023-11-19 07:42:10,091 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, -4 predicate places. [2023-11-19 07:42:10,092 INFO L495 AbstractCegarLoop]: Abstraction has has 14 places, 10 transitions, 22 flow [2023-11-19 07:42:10,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 58.5) internal successors, (117), 2 states have internal predecessors, (117), 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) [2023-11-19 07:42:10,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:42:10,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 07:42:10,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:42:10,093 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 2 more)] === [2023-11-19 07:42:10,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:10,094 INFO L85 PathProgramCache]: Analyzing trace with hash 286369575, now seen corresponding path program 1 times [2023-11-19 07:42:10,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:10,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088003211] [2023-11-19 07:42:10,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:10,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:10,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:10,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:42:10,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:42:10,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088003211] [2023-11-19 07:42:10,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088003211] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:42:10,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:42:10,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:42:10,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803864862] [2023-11-19 07:42:10,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:42:10,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:42:10,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:42:10,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:42:10,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:42:10,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 127 [2023-11-19 07:42:10,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 14 places, 10 transitions, 22 flow. Second operand has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 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) [2023-11-19 07:42:10,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:42:10,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 127 [2023-11-19 07:42:10,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:42:10,311 INFO L124 PetriNetUnfolderBase]: 14/43 cut-off events. [2023-11-19 07:42:10,312 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:42:10,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 43 events. 14/43 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 109 event pairs, 5 based on Foata normal form. 0/41 useless extension candidates. Maximal degree in co-relation 88. Up to 24 conditions per place. [2023-11-19 07:42:10,313 INFO L140 encePairwiseOnDemand]: 123/127 looper letters, 12 selfloop transitions, 3 changer transitions 0/15 dead transitions. [2023-11-19 07:42:10,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 16 places, 15 transitions, 62 flow [2023-11-19 07:42:10,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:42:10,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:42:10,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 178 transitions. [2023-11-19 07:42:10,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4671916010498688 [2023-11-19 07:42:10,316 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 178 transitions. [2023-11-19 07:42:10,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 178 transitions. [2023-11-19 07:42:10,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:42:10,317 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 178 transitions. [2023-11-19 07:42:10,319 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 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) [2023-11-19 07:42:10,320 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 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) [2023-11-19 07:42:10,321 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 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) [2023-11-19 07:42:10,321 INFO L175 Difference]: Start difference. First operand has 14 places, 10 transitions, 22 flow. Second operand 3 states and 178 transitions. [2023-11-19 07:42:10,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 16 places, 15 transitions, 62 flow [2023-11-19 07:42:10,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 16 places, 15 transitions, 62 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:42:10,322 INFO L231 Difference]: Finished difference. Result has 18 places, 11 transitions, 40 flow [2023-11-19 07:42:10,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=22, PETRI_DIFFERENCE_MINUEND_PLACES=14, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=40, PETRI_PLACES=18, PETRI_TRANSITIONS=11} [2023-11-19 07:42:10,323 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 0 predicate places. [2023-11-19 07:42:10,324 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 11 transitions, 40 flow [2023-11-19 07:42:10,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 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) [2023-11-19 07:42:10,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:42:10,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-19 07:42:10,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:42:10,325 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 2 more)] === [2023-11-19 07:42:10,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:10,326 INFO L85 PathProgramCache]: Analyzing trace with hash 287521444, now seen corresponding path program 1 times [2023-11-19 07:42:10,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:10,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121049471] [2023-11-19 07:42:10,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:10,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:10,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:10,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:42:10,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:42:10,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121049471] [2023-11-19 07:42:10,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121049471] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:42:10,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:42:10,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:42:10,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318299828] [2023-11-19 07:42:10,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:42:10,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:42:10,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:42:10,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:42:10,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:42:10,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 127 [2023-11-19 07:42:10,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 11 transitions, 40 flow. Second operand has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 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) [2023-11-19 07:42:10,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:42:10,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 127 [2023-11-19 07:42:10,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:42:10,656 INFO L124 PetriNetUnfolderBase]: 8/30 cut-off events. [2023-11-19 07:42:10,656 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-11-19 07:42:10,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 30 events. 8/30 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 68 event pairs, 8 based on Foata normal form. 5/35 useless extension candidates. Maximal degree in co-relation 75. Up to 27 conditions per place. [2023-11-19 07:42:10,657 INFO L140 encePairwiseOnDemand]: 125/127 looper letters, 6 selfloop transitions, 1 changer transitions 2/10 dead transitions. [2023-11-19 07:42:10,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 10 transitions, 56 flow [2023-11-19 07:42:10,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:42:10,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:42:10,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 168 transitions. [2023-11-19 07:42:10,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4409448818897638 [2023-11-19 07:42:10,663 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 168 transitions. [2023-11-19 07:42:10,663 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 168 transitions. [2023-11-19 07:42:10,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:42:10,664 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 168 transitions. [2023-11-19 07:42:10,666 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) [2023-11-19 07:42:10,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 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) [2023-11-19 07:42:10,669 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 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) [2023-11-19 07:42:10,669 INFO L175 Difference]: Start difference. First operand has 18 places, 11 transitions, 40 flow. Second operand 3 states and 168 transitions. [2023-11-19 07:42:10,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 10 transitions, 56 flow [2023-11-19 07:42:10,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 10 transitions, 50 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:42:10,671 INFO L231 Difference]: Finished difference. Result has 17 places, 8 transitions, 28 flow [2023-11-19 07:42:10,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=28, PETRI_PLACES=17, PETRI_TRANSITIONS=8} [2023-11-19 07:42:10,673 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, -1 predicate places. [2023-11-19 07:42:10,673 INFO L495 AbstractCegarLoop]: Abstraction has has 17 places, 8 transitions, 28 flow [2023-11-19 07:42:10,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 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) [2023-11-19 07:42:10,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:42:10,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:42:10,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:42:10,678 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 2 more)] === [2023-11-19 07:42:10,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:10,679 INFO L85 PathProgramCache]: Analyzing trace with hash 323253584, now seen corresponding path program 1 times [2023-11-19 07:42:10,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:10,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519183453] [2023-11-19 07:42:10,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:10,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:10,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:10,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:42:10,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:42:10,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519183453] [2023-11-19 07:42:10,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519183453] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:42:10,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:42:10,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:42:10,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744789162] [2023-11-19 07:42:10,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:42:10,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:42:10,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:42:10,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:42:10,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:42:10,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 127 [2023-11-19 07:42:10,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 17 places, 8 transitions, 28 flow. Second operand has 4 states, 4 states have (on average 57.5) internal successors, (230), 4 states have internal predecessors, (230), 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) [2023-11-19 07:42:10,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:42:10,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 127 [2023-11-19 07:42:10,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:42:10,869 INFO L124 PetriNetUnfolderBase]: 2/16 cut-off events. [2023-11-19 07:42:10,869 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:42:10,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 16 events. 2/16 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 18 event pairs, 1 based on Foata normal form. 2/18 useless extension candidates. Maximal degree in co-relation 40. Up to 10 conditions per place. [2023-11-19 07:42:10,870 INFO L140 encePairwiseOnDemand]: 124/127 looper letters, 5 selfloop transitions, 2 changer transitions 1/9 dead transitions. [2023-11-19 07:42:10,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 9 transitions, 46 flow [2023-11-19 07:42:10,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:42:10,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:42:10,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 233 transitions. [2023-11-19 07:42:10,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45866141732283466 [2023-11-19 07:42:10,874 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 233 transitions. [2023-11-19 07:42:10,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 233 transitions. [2023-11-19 07:42:10,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:42:10,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 233 transitions. [2023-11-19 07:42:10,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 58.25) internal successors, (233), 4 states have internal predecessors, (233), 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) [2023-11-19 07:42:10,879 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 127.0) internal successors, (635), 5 states have internal predecessors, (635), 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) [2023-11-19 07:42:10,879 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 127.0) internal successors, (635), 5 states have internal predecessors, (635), 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) [2023-11-19 07:42:10,880 INFO L175 Difference]: Start difference. First operand has 17 places, 8 transitions, 28 flow. Second operand 4 states and 233 transitions. [2023-11-19 07:42:10,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 9 transitions, 46 flow [2023-11-19 07:42:10,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 9 transitions, 45 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:42:10,881 INFO L231 Difference]: Finished difference. Result has 19 places, 8 transitions, 34 flow [2023-11-19 07:42:10,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=27, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=34, PETRI_PLACES=19, PETRI_TRANSITIONS=8} [2023-11-19 07:42:10,882 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 1 predicate places. [2023-11-19 07:42:10,882 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 8 transitions, 34 flow [2023-11-19 07:42:10,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 57.5) internal successors, (230), 4 states have internal predecessors, (230), 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) [2023-11-19 07:42:10,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:42:10,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:42:10,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:42:10,884 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)] === [2023-11-19 07:42:10,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:10,889 INFO L85 PathProgramCache]: Analyzing trace with hash 284823194, now seen corresponding path program 2 times [2023-11-19 07:42:10,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:10,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703592724] [2023-11-19 07:42:10,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:10,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:10,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:10,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:42:10,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:42:10,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703592724] [2023-11-19 07:42:10,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703592724] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:42:10,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:42:10,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:42:10,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276695671] [2023-11-19 07:42:10,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:42:10,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:42:10,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:42:10,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:42:10,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:42:10,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 127 [2023-11-19 07:42:10,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 8 transitions, 34 flow. Second operand has 3 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 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) [2023-11-19 07:42:10,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:42:10,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 127 [2023-11-19 07:42:10,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:42:11,014 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2023-11-19 07:42:11,014 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-11-19 07:42:11,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31 conditions, 8 events. 0/8 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 4 event pairs, 0 based on Foata normal form. 1/9 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2023-11-19 07:42:11,015 INFO L140 encePairwiseOnDemand]: 124/127 looper letters, 0 selfloop transitions, 0 changer transitions 7/7 dead transitions. [2023-11-19 07:42:11,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 7 transitions, 42 flow [2023-11-19 07:42:11,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:42:11,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:42:11,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 175 transitions. [2023-11-19 07:42:11,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45931758530183725 [2023-11-19 07:42:11,017 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 175 transitions. [2023-11-19 07:42:11,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 175 transitions. [2023-11-19 07:42:11,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:42:11,017 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 175 transitions. [2023-11-19 07:42:11,018 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 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) [2023-11-19 07:42:11,019 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 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) [2023-11-19 07:42:11,020 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 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) [2023-11-19 07:42:11,020 INFO L175 Difference]: Start difference. First operand has 19 places, 8 transitions, 34 flow. Second operand 3 states and 175 transitions. [2023-11-19 07:42:11,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 7 transitions, 42 flow [2023-11-19 07:42:11,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 7 transitions, 37 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-19 07:42:11,022 INFO L231 Difference]: Finished difference. Result has 17 places, 0 transitions, 0 flow [2023-11-19 07:42:11,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=25, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=17, PETRI_TRANSITIONS=0} [2023-11-19 07:42:11,024 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, -1 predicate places. [2023-11-19 07:42:11,025 INFO L495 AbstractCegarLoop]: Abstraction has has 17 places, 0 transitions, 0 flow [2023-11-19 07:42:11,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 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) [2023-11-19 07:42:11,028 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 5 remaining) [2023-11-19 07:42:11,029 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 5 remaining) [2023-11-19 07:42:11,030 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (2 of 5 remaining) [2023-11-19 07:42:11,031 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (1 of 5 remaining) [2023-11-19 07:42:11,031 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 5 remaining) [2023-11-19 07:42:11,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 07:42:11,031 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1] [2023-11-19 07:42:11,036 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-19 07:42:11,036 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-19 07:42:11,046 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 07:42:11 BasicIcfg [2023-11-19 07:42:11,046 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-19 07:42:11,047 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-19 07:42:11,047 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-19 07:42:11,047 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-19 07:42:11,048 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:42:07" (3/4) ... [2023-11-19 07:42:11,050 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-19 07:42:11,053 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thr1 [2023-11-19 07:42:11,061 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 21 nodes and edges [2023-11-19 07:42:11,062 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2023-11-19 07:42:11,062 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-11-19 07:42:11,062 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-11-19 07:42:11,173 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d482f0-92c3-4bcc-b554-a071b7cb9256/bin/uautomizer-verify-uCwYo4JHxu/witness.graphml [2023-11-19 07:42:11,173 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d482f0-92c3-4bcc-b554-a071b7cb9256/bin/uautomizer-verify-uCwYo4JHxu/witness.yml [2023-11-19 07:42:11,174 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-19 07:42:11,175 INFO L158 Benchmark]: Toolchain (without parser) took 5103.89ms. Allocated memory was 117.4MB in the beginning and 159.4MB in the end (delta: 41.9MB). Free memory was 81.9MB in the beginning and 87.5MB in the end (delta: -5.6MB). Peak memory consumption was 39.0MB. Max. memory is 16.1GB. [2023-11-19 07:42:11,176 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 117.4MB. Free memory is still 66.4MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-19 07:42:11,176 INFO L158 Benchmark]: CACSL2BoogieTranslator took 548.70ms. Allocated memory is still 117.4MB. Free memory was 81.9MB in the beginning and 61.8MB in the end (delta: 20.2MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2023-11-19 07:42:11,177 INFO L158 Benchmark]: Boogie Procedure Inliner took 80.46ms. Allocated memory is still 117.4MB. Free memory was 61.8MB in the beginning and 59.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-19 07:42:11,177 INFO L158 Benchmark]: Boogie Preprocessor took 52.24ms. Allocated memory is still 117.4MB. Free memory was 59.7MB in the beginning and 58.3MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-19 07:42:11,177 INFO L158 Benchmark]: RCFGBuilder took 682.25ms. Allocated memory was 117.4MB in the beginning and 159.4MB in the end (delta: 41.9MB). Free memory was 58.3MB in the beginning and 123.9MB in the end (delta: -65.6MB). Peak memory consumption was 20.4MB. Max. memory is 16.1GB. [2023-11-19 07:42:11,178 INFO L158 Benchmark]: TraceAbstraction took 3603.52ms. Allocated memory is still 159.4MB. Free memory was 122.9MB in the beginning and 91.7MB in the end (delta: 31.1MB). Peak memory consumption was 31.1MB. Max. memory is 16.1GB. [2023-11-19 07:42:11,178 INFO L158 Benchmark]: Witness Printer took 126.90ms. Allocated memory is still 159.4MB. Free memory was 91.7MB in the beginning and 87.5MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-19 07:42:11,181 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 117.4MB. Free memory is still 66.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 548.70ms. Allocated memory is still 117.4MB. Free memory was 81.9MB in the beginning and 61.8MB in the end (delta: 20.2MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 80.46ms. Allocated memory is still 117.4MB. Free memory was 61.8MB in the beginning and 59.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 52.24ms. Allocated memory is still 117.4MB. Free memory was 59.7MB in the beginning and 58.3MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 682.25ms. Allocated memory was 117.4MB in the beginning and 159.4MB in the end (delta: 41.9MB). Free memory was 58.3MB in the beginning and 123.9MB in the end (delta: -65.6MB). Peak memory consumption was 20.4MB. Max. memory is 16.1GB. * TraceAbstraction took 3603.52ms. Allocated memory is still 159.4MB. Free memory was 122.9MB in the beginning and 91.7MB in the end (delta: 31.1MB). Peak memory consumption was 31.1MB. Max. memory is 16.1GB. * Witness Printer took 126.90ms. Allocated memory is still 159.4MB. Free memory was 91.7MB in the beginning and 87.5MB 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: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.2s, 60 PlacesBefore, 18 PlacesAfterwards, 58 TransitionsBefore, 16 TransitionsAfterwards, 384 CoEnabledTransitionPairs, 6 FixpointIterations, 20 TrivialSequentialCompositions, 32 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 11 ConcurrentYvCompositions, 0 ChoiceCompositions, 63 TotalNumberOfCompositions, 852 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 554, independent: 467, independent conditional: 0, independent unconditional: 467, dependent: 87, dependent conditional: 0, dependent unconditional: 87, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 235, independent: 213, independent conditional: 0, independent unconditional: 213, dependent: 22, dependent conditional: 0, dependent unconditional: 22, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 554, independent: 254, independent conditional: 0, independent unconditional: 254, dependent: 65, dependent conditional: 0, dependent unconditional: 65, unknown: 235, unknown conditional: 0, unknown unconditional: 235] , Statistics on independence cache: Total cache size (in pairs): 25, Positive cache size: 15, Positive conditional cache size: 0, Positive unconditional cache size: 15, Negative cache size: 10, Negative conditional cache size: 0, Negative unconditional cache size: 10, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - 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: 16]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 747]: 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, 71 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: 3.5s, OverallIterations: 5, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.3s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 67 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 28 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 2 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 111 IncrementalHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2 mSolverCounterUnsat, 0 mSDtfsCounter, 111 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred in iteration=2, InterpolantAutomatonStates: 15, 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, 0.5s InterpolantComputationTime, 26 NumberOfCodeBlocks, 26 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 21 ConstructedInterpolants, 0 QuantifiedInterpolants, 56 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! [2023-11-19 07:42:11,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d482f0-92c3-4bcc-b554-a071b7cb9256/bin/uautomizer-verify-uCwYo4JHxu/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