./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_19-callback_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_19-callback_racing.i -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux --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 a178b12ba1b75e8e390c539a1b1599b5e56cbe73098e0c8e7ca0eeb62a619e80 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 19:46:36,283 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 19:46:36,359 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-11 19:46:36,371 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 19:46:36,373 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 19:46:36,401 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 19:46:36,401 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 19:46:36,402 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 19:46:36,403 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 19:46:36,404 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 19:46:36,404 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 19:46:36,404 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 19:46:36,405 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 19:46:36,405 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 19:46:36,407 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 19:46:36,408 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 19:46:36,408 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 19:46:36,408 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 19:46:36,409 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 19:46:36,409 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 19:46:36,409 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-11 19:46:36,412 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-11 19:46:36,412 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-11 19:46:36,412 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 19:46:36,413 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-11 19:46:36,413 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 19:46:36,413 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-11 19:46:36,413 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 19:46:36,414 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 19:46:36,414 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 19:46:36,414 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 19:46:36,414 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 19:46:36,415 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 19:46:36,415 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 19:46:36,416 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 19:46:36,417 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 19:46:36,417 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 19:46:36,417 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 19:46:36,417 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 19:46:36,418 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 19:46:36,418 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 19:46:36,418 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 19:46:36,419 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:/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a178b12ba1b75e8e390c539a1b1599b5e56cbe73098e0c8e7ca0eeb62a619e80 [2024-10-11 19:46:36,695 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 19:46:36,719 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 19:46:36,722 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 19:46:36,723 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 19:46:36,724 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 19:46:36,725 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_19-callback_racing.i [2024-10-11 19:46:38,110 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 19:46:38,411 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 19:46:38,415 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_19-callback_racing.i [2024-10-11 19:46:38,438 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/98f766d62/20b0beefb987408b92438da7e39e4844/FLAG1c55b3077 [2024-10-11 19:46:38,452 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/98f766d62/20b0beefb987408b92438da7e39e4844 [2024-10-11 19:46:38,454 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 19:46:38,455 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 19:46:38,456 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 19:46:38,456 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 19:46:38,461 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 19:46:38,461 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 07:46:38" (1/1) ... [2024-10-11 19:46:38,462 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69442ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:46:38, skipping insertion in model container [2024-10-11 19:46:38,462 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 07:46:38" (1/1) ... [2024-10-11 19:46:38,506 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 19:46:38,862 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 19:46:38,875 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 19:46:38,927 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 19:46:38,976 INFO L204 MainTranslator]: Completed translation [2024-10-11 19:46:38,976 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:46:38 WrapperNode [2024-10-11 19:46:38,977 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 19:46:38,978 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 19:46:38,978 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 19:46:38,979 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 19:46:38,985 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:46:38" (1/1) ... [2024-10-11 19:46:39,003 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:46:38" (1/1) ... [2024-10-11 19:46:39,034 INFO L138 Inliner]: procedures = 174, calls = 45, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 149 [2024-10-11 19:46:39,037 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 19:46:39,038 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 19:46:39,039 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 19:46:39,039 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 19:46:39,049 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:46:38" (1/1) ... [2024-10-11 19:46:39,050 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:46:38" (1/1) ... [2024-10-11 19:46:39,053 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:46:38" (1/1) ... [2024-10-11 19:46:39,088 INFO L175 MemorySlicer]: Split 19 memory accesses to 5 slices as follows [2, 5, 5, 5, 2]. 26 percent of accesses are in the largest equivalence class. The 17 initializations are split as follows [2, 5, 5, 5, 0]. The 1 writes are split as follows [0, 0, 0, 0, 1]. [2024-10-11 19:46:39,089 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:46:38" (1/1) ... [2024-10-11 19:46:39,090 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:46:38" (1/1) ... [2024-10-11 19:46:39,096 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:46:38" (1/1) ... [2024-10-11 19:46:39,100 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:46:38" (1/1) ... [2024-10-11 19:46:39,102 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:46:38" (1/1) ... [2024-10-11 19:46:39,107 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:46:38" (1/1) ... [2024-10-11 19:46:39,110 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 19:46:39,111 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 19:46:39,112 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 19:46:39,112 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 19:46:39,116 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:46:38" (1/1) ... [2024-10-11 19:46:39,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 19:46:39,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:46:39,146 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 19:46:39,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 19:46:39,189 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-11 19:46:39,189 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-11 19:46:39,189 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-11 19:46:39,189 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-11 19:46:39,189 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-10-11 19:46:39,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-11 19:46:39,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-11 19:46:39,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-11 19:46:39,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-11 19:46:39,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-10-11 19:46:39,190 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-10-11 19:46:39,192 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 19:46:39,192 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-11 19:46:39,192 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-10-11 19:46:39,192 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-10-11 19:46:39,192 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-11 19:46:39,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-11 19:46:39,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-11 19:46:39,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-11 19:46:39,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-11 19:46:39,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-10-11 19:46:39,193 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-10-11 19:46:39,193 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 19:46:39,193 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 19:46:39,195 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-11 19:46:39,318 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 19:46:39,320 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 19:46:39,581 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-11 19:46:39,582 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 19:46:39,846 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 19:46:39,847 INFO L314 CfgBuilder]: Removed 11 assume(true) statements. [2024-10-11 19:46:39,848 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 07:46:39 BoogieIcfgContainer [2024-10-11 19:46:39,848 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 19:46:39,850 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 19:46:39,850 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 19:46:39,854 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 19:46:39,854 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 07:46:38" (1/3) ... [2024-10-11 19:46:39,855 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71abd296 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 07:46:39, skipping insertion in model container [2024-10-11 19:46:39,855 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:46:38" (2/3) ... [2024-10-11 19:46:39,856 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71abd296 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 07:46:39, skipping insertion in model container [2024-10-11 19:46:39,856 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 07:46:39" (3/3) ... [2024-10-11 19:46:39,857 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_19-callback_racing.i [2024-10-11 19:46:39,873 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 19:46:39,874 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2024-10-11 19:46:39,874 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-11 19:46:39,910 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-10-11 19:46:39,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 65 transitions, 137 flow [2024-10-11 19:46:39,990 INFO L124 PetriNetUnfolderBase]: 21/104 cut-off events. [2024-10-11 19:46:39,991 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-11 19:46:39,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109 conditions, 104 events. 21/104 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 384 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 60. Up to 6 conditions per place. [2024-10-11 19:46:39,996 INFO L82 GeneralOperation]: Start removeDead. Operand has 55 places, 65 transitions, 137 flow [2024-10-11 19:46:40,001 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 65 transitions, 137 flow [2024-10-11 19:46:40,014 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 19:46:40,022 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4d972ca8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 19:46:40,024 INFO L334 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-10-11 19:46:40,030 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 19:46:40,030 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-10-11 19:46:40,031 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 19:46:40,031 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:46:40,032 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-11 19:46:40,032 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-11 19:46:40,037 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:46:40,037 INFO L85 PathProgramCache]: Analyzing trace with hash 421347, now seen corresponding path program 1 times [2024-10-11 19:46:40,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:46:40,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317389517] [2024-10-11 19:46:40,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:46:40,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:46:40,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:46:40,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:46:40,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:46:40,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317389517] [2024-10-11 19:46:40,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317389517] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:46:40,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:46:40,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-11 19:46:40,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552835511] [2024-10-11 19:46:40,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:46:40,340 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:46:40,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:46:40,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:46:40,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:46:40,392 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 65 [2024-10-11 19:46:40,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 65 transitions, 137 flow. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:46:40,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:46:40,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 65 [2024-10-11 19:46:40,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:46:40,587 INFO L124 PetriNetUnfolderBase]: 173/517 cut-off events. [2024-10-11 19:46:40,587 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-11 19:46:40,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 896 conditions, 517 events. 173/517 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2797 event pairs, 136 based on Foata normal form. 97/576 useless extension candidates. Maximal degree in co-relation 828. Up to 337 conditions per place. [2024-10-11 19:46:40,595 INFO L140 encePairwiseOnDemand]: 51/65 looper letters, 39 selfloop transitions, 2 changer transitions 0/60 dead transitions. [2024-10-11 19:46:40,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 60 transitions, 209 flow [2024-10-11 19:46:40,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:46:40,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:46:40,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 114 transitions. [2024-10-11 19:46:40,610 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5846153846153846 [2024-10-11 19:46:40,613 INFO L175 Difference]: Start difference. First operand has 55 places, 65 transitions, 137 flow. Second operand 3 states and 114 transitions. [2024-10-11 19:46:40,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 60 transitions, 209 flow [2024-10-11 19:46:40,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 60 transitions, 209 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-11 19:46:40,622 INFO L231 Difference]: Finished difference. Result has 54 places, 52 transitions, 115 flow [2024-10-11 19:46:40,627 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=65, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=115, PETRI_PLACES=54, PETRI_TRANSITIONS=52} [2024-10-11 19:46:40,631 INFO L277 CegarLoopForPetriNet]: 55 programPoint places, -1 predicate places. [2024-10-11 19:46:40,633 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 52 transitions, 115 flow [2024-10-11 19:46:40,634 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:46:40,634 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:46:40,635 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-11 19:46:40,635 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 19:46:40,635 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-11 19:46:40,636 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:46:40,636 INFO L85 PathProgramCache]: Analyzing trace with hash 421348, now seen corresponding path program 1 times [2024-10-11 19:46:40,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:46:40,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392137000] [2024-10-11 19:46:40,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:46:40,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:46:40,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:46:40,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:46:40,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:46:40,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392137000] [2024-10-11 19:46:40,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392137000] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:46:40,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:46:40,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-11 19:46:40,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357558849] [2024-10-11 19:46:40,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:46:40,809 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:46:40,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:46:40,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:46:40,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:46:40,828 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 65 [2024-10-11 19:46:40,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 52 transitions, 115 flow. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:46:40,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:46:40,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 65 [2024-10-11 19:46:40,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:46:40,987 INFO L124 PetriNetUnfolderBase]: 162/477 cut-off events. [2024-10-11 19:46:40,987 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-10-11 19:46:40,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 834 conditions, 477 events. 162/477 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2423 event pairs, 136 based on Foata normal form. 1/439 useless extension candidates. Maximal degree in co-relation 805. Up to 329 conditions per place. [2024-10-11 19:46:40,994 INFO L140 encePairwiseOnDemand]: 61/65 looper letters, 39 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2024-10-11 19:46:40,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 61 transitions, 215 flow [2024-10-11 19:46:40,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:46:40,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:46:40,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 109 transitions. [2024-10-11 19:46:40,999 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.558974358974359 [2024-10-11 19:46:40,999 INFO L175 Difference]: Start difference. First operand has 54 places, 52 transitions, 115 flow. Second operand 3 states and 109 transitions. [2024-10-11 19:46:41,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 61 transitions, 215 flow [2024-10-11 19:46:41,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 61 transitions, 211 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-11 19:46:41,004 INFO L231 Difference]: Finished difference. Result has 55 places, 52 transitions, 121 flow [2024-10-11 19:46:41,004 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=65, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=121, PETRI_PLACES=55, PETRI_TRANSITIONS=52} [2024-10-11 19:46:41,005 INFO L277 CegarLoopForPetriNet]: 55 programPoint places, 0 predicate places. [2024-10-11 19:46:41,005 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 52 transitions, 121 flow [2024-10-11 19:46:41,006 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:46:41,006 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:46:41,007 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-10-11 19:46:41,007 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-11 19:46:41,008 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-11 19:46:41,009 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:46:41,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1706404823, now seen corresponding path program 1 times [2024-10-11 19:46:41,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:46:41,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747607797] [2024-10-11 19:46:41,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:46:41,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:46:41,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:46:41,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:46:41,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:46:41,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747607797] [2024-10-11 19:46:41,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747607797] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:46:41,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491958128] [2024-10-11 19:46:41,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:46:41,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:46:41,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:46:41,316 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:46:41,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-11 19:46:41,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:46:41,400 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-11 19:46:41,404 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:46:41,469 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-11 19:46:41,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:46:41,557 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:46:41,643 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:46:41,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491958128] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:46:41,644 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 19:46:41,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-10-11 19:46:41,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463286864] [2024-10-11 19:46:41,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 19:46:41,645 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-11 19:46:41,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:46:41,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-11 19:46:41,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-10-11 19:46:41,717 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 65 [2024-10-11 19:46:41,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 52 transitions, 121 flow. Second operand has 9 states, 9 states have (on average 23.333333333333332) internal successors, (210), 9 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:46:41,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:46:41,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 65 [2024-10-11 19:46:41,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:46:41,801 INFO L124 PetriNetUnfolderBase]: 24/90 cut-off events. [2024-10-11 19:46:41,801 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2024-10-11 19:46:41,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179 conditions, 90 events. 24/90 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 257 event pairs, 16 based on Foata normal form. 18/107 useless extension candidates. Maximal degree in co-relation 160. Up to 51 conditions per place. [2024-10-11 19:46:41,803 INFO L140 encePairwiseOnDemand]: 61/65 looper letters, 21 selfloop transitions, 2 changer transitions 0/31 dead transitions. [2024-10-11 19:46:41,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 31 transitions, 118 flow [2024-10-11 19:46:41,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 19:46:41,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 19:46:41,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 109 transitions. [2024-10-11 19:46:41,805 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41923076923076924 [2024-10-11 19:46:41,805 INFO L175 Difference]: Start difference. First operand has 55 places, 52 transitions, 121 flow. Second operand 4 states and 109 transitions. [2024-10-11 19:46:41,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 31 transitions, 118 flow [2024-10-11 19:46:41,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 31 transitions, 112 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-11 19:46:41,806 INFO L231 Difference]: Finished difference. Result has 27 places, 21 transitions, 50 flow [2024-10-11 19:46:41,807 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=65, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=50, PETRI_PLACES=27, PETRI_TRANSITIONS=21} [2024-10-11 19:46:41,807 INFO L277 CegarLoopForPetriNet]: 55 programPoint places, -28 predicate places. [2024-10-11 19:46:41,808 INFO L471 AbstractCegarLoop]: Abstraction has has 27 places, 21 transitions, 50 flow [2024-10-11 19:46:41,808 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 23.333333333333332) internal successors, (210), 9 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:46:41,808 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:46:41,808 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2024-10-11 19:46:41,827 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-11 19:46:42,012 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:46:42,013 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-11 19:46:42,014 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:46:42,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1358941576, now seen corresponding path program 1 times [2024-10-11 19:46:42,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:46:42,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387587595] [2024-10-11 19:46:42,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:46:42,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:46:42,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 19:46:42,038 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-11 19:46:42,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 19:46:42,076 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-11 19:46:42,076 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-11 19:46:42,077 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2024-10-11 19:46:42,079 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 8 remaining) [2024-10-11 19:46:42,080 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 8 remaining) [2024-10-11 19:46:42,080 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 8 remaining) [2024-10-11 19:46:42,080 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 8 remaining) [2024-10-11 19:46:42,081 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (2 of 8 remaining) [2024-10-11 19:46:42,081 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (1 of 8 remaining) [2024-10-11 19:46:42,081 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 8 remaining) [2024-10-11 19:46:42,081 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-11 19:46:42,082 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-10-11 19:46:42,084 WARN L239 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-11 19:46:42,084 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-10-11 19:46:42,106 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-11 19:46:42,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 74 places, 87 transitions, 190 flow [2024-10-11 19:46:42,125 INFO L124 PetriNetUnfolderBase]: 35/177 cut-off events. [2024-10-11 19:46:42,125 INFO L125 PetriNetUnfolderBase]: For 6/7 co-relation queries the response was YES. [2024-10-11 19:46:42,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189 conditions, 177 events. 35/177 cut-off events. For 6/7 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 763 event pairs, 0 based on Foata normal form. 0/118 useless extension candidates. Maximal degree in co-relation 108. Up to 9 conditions per place. [2024-10-11 19:46:42,128 INFO L82 GeneralOperation]: Start removeDead. Operand has 74 places, 87 transitions, 190 flow [2024-10-11 19:46:42,130 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 87 transitions, 190 flow [2024-10-11 19:46:42,131 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 19:46:42,133 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4d972ca8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 19:46:42,133 INFO L334 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2024-10-11 19:46:42,135 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 19:46:42,136 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-10-11 19:46:42,136 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 19:46:42,136 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:46:42,136 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-11 19:46:42,136 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-10-11 19:46:42,137 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:46:42,137 INFO L85 PathProgramCache]: Analyzing trace with hash 507738, now seen corresponding path program 1 times [2024-10-11 19:46:42,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:46:42,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85385156] [2024-10-11 19:46:42,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:46:42,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:46:42,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:46:42,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:46:42,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:46:42,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85385156] [2024-10-11 19:46:42,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85385156] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:46:42,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:46:42,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-11 19:46:42,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484142307] [2024-10-11 19:46:42,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:46:42,188 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:46:42,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:46:42,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:46:42,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:46:42,202 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 87 [2024-10-11 19:46:42,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 87 transitions, 190 flow. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:46:42,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:46:42,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 87 [2024-10-11 19:46:42,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:46:42,934 INFO L124 PetriNetUnfolderBase]: 3201/6416 cut-off events. [2024-10-11 19:46:42,935 INFO L125 PetriNetUnfolderBase]: For 52/52 co-relation queries the response was YES. [2024-10-11 19:46:42,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11544 conditions, 6416 events. 3201/6416 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 49988 event pairs, 2688 based on Foata normal form. 1446/7476 useless extension candidates. Maximal degree in co-relation 8154. Up to 4555 conditions per place. [2024-10-11 19:46:42,983 INFO L140 encePairwiseOnDemand]: 69/87 looper letters, 57 selfloop transitions, 2 changer transitions 0/85 dead transitions. [2024-10-11 19:46:42,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 85 transitions, 304 flow [2024-10-11 19:46:42,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:46:42,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:46:42,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 161 transitions. [2024-10-11 19:46:42,991 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6168582375478927 [2024-10-11 19:46:42,991 INFO L175 Difference]: Start difference. First operand has 74 places, 87 transitions, 190 flow. Second operand 3 states and 161 transitions. [2024-10-11 19:46:42,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 85 transitions, 304 flow [2024-10-11 19:46:42,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 85 transitions, 304 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-11 19:46:42,994 INFO L231 Difference]: Finished difference. Result has 72 places, 69 transitions, 158 flow [2024-10-11 19:46:42,994 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=158, PETRI_PLACES=72, PETRI_TRANSITIONS=69} [2024-10-11 19:46:42,995 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, -2 predicate places. [2024-10-11 19:46:42,996 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 69 transitions, 158 flow [2024-10-11 19:46:42,996 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:46:42,996 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:46:42,996 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-11 19:46:42,997 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-11 19:46:42,997 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-10-11 19:46:42,997 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:46:42,998 INFO L85 PathProgramCache]: Analyzing trace with hash 507739, now seen corresponding path program 1 times [2024-10-11 19:46:42,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:46:42,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622135127] [2024-10-11 19:46:42,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:46:42,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:46:43,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:46:43,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:46:43,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:46:43,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622135127] [2024-10-11 19:46:43,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622135127] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:46:43,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:46:43,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-11 19:46:43,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724246785] [2024-10-11 19:46:43,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:46:43,073 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:46:43,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:46:43,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:46:43,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:46:43,087 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 87 [2024-10-11 19:46:43,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 69 transitions, 158 flow. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:46:43,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:46:43,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 87 [2024-10-11 19:46:43,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:46:43,704 INFO L124 PetriNetUnfolderBase]: 3038/6160 cut-off events. [2024-10-11 19:46:43,704 INFO L125 PetriNetUnfolderBase]: For 140/140 co-relation queries the response was YES. [2024-10-11 19:46:43,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11114 conditions, 6160 events. 3038/6160 cut-off events. For 140/140 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 47393 event pairs, 2651 based on Foata normal form. 1/5757 useless extension candidates. Maximal degree in co-relation 9820. Up to 4789 conditions per place. [2024-10-11 19:46:43,740 INFO L140 encePairwiseOnDemand]: 83/87 looper letters, 50 selfloop transitions, 2 changer transitions 0/79 dead transitions. [2024-10-11 19:46:43,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 79 transitions, 282 flow [2024-10-11 19:46:43,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:46:43,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:46:43,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 141 transitions. [2024-10-11 19:46:43,743 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5402298850574713 [2024-10-11 19:46:43,744 INFO L175 Difference]: Start difference. First operand has 72 places, 69 transitions, 158 flow. Second operand 3 states and 141 transitions. [2024-10-11 19:46:43,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 79 transitions, 282 flow [2024-10-11 19:46:43,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 79 transitions, 278 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-11 19:46:43,748 INFO L231 Difference]: Finished difference. Result has 73 places, 70 transitions, 168 flow [2024-10-11 19:46:43,748 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=73, PETRI_TRANSITIONS=70} [2024-10-11 19:46:43,749 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, -1 predicate places. [2024-10-11 19:46:43,750 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 70 transitions, 168 flow [2024-10-11 19:46:43,751 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:46:43,751 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:46:43,751 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-10-11 19:46:43,751 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-11 19:46:43,751 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-10-11 19:46:43,752 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:46:43,752 INFO L85 PathProgramCache]: Analyzing trace with hash 771360588, now seen corresponding path program 1 times [2024-10-11 19:46:43,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:46:43,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799879380] [2024-10-11 19:46:43,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:46:43,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:46:43,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:46:43,876 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:46:43,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:46:43,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799879380] [2024-10-11 19:46:43,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799879380] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:46:43,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394060495] [2024-10-11 19:46:43,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:46:43,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:46:43,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:46:43,880 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:46:43,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-11 19:46:43,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:46:43,965 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-11 19:46:43,966 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:46:43,980 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-11 19:46:44,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:46:44,037 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:46:44,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:46:44,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394060495] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:46:44,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 19:46:44,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-10-11 19:46:44,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598296795] [2024-10-11 19:46:44,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 19:46:44,101 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-11 19:46:44,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:46:44,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-11 19:46:44,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-10-11 19:46:44,219 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 87 [2024-10-11 19:46:44,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 70 transitions, 168 flow. Second operand has 9 states, 9 states have (on average 30.333333333333332) internal successors, (273), 9 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:46:44,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:46:44,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 87 [2024-10-11 19:46:44,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:46:44,430 INFO L124 PetriNetUnfolderBase]: 528/1055 cut-off events. [2024-10-11 19:46:44,430 INFO L125 PetriNetUnfolderBase]: For 204/204 co-relation queries the response was YES. [2024-10-11 19:46:44,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2081 conditions, 1055 events. 528/1055 cut-off events. For 204/204 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 6180 event pairs, 77 based on Foata normal form. 180/1219 useless extension candidates. Maximal degree in co-relation 1776. Up to 675 conditions per place. [2024-10-11 19:46:44,438 INFO L140 encePairwiseOnDemand]: 83/87 looper letters, 48 selfloop transitions, 3 changer transitions 0/66 dead transitions. [2024-10-11 19:46:44,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 66 transitions, 252 flow [2024-10-11 19:46:44,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 19:46:44,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 19:46:44,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 195 transitions. [2024-10-11 19:46:44,441 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4482758620689655 [2024-10-11 19:46:44,441 INFO L175 Difference]: Start difference. First operand has 73 places, 70 transitions, 168 flow. Second operand 5 states and 195 transitions. [2024-10-11 19:46:44,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 66 transitions, 252 flow [2024-10-11 19:46:44,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 66 transitions, 250 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-11 19:46:44,445 INFO L231 Difference]: Finished difference. Result has 48 places, 38 transitions, 98 flow [2024-10-11 19:46:44,445 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=98, PETRI_PLACES=48, PETRI_TRANSITIONS=38} [2024-10-11 19:46:44,445 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, -26 predicate places. [2024-10-11 19:46:44,446 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 38 transitions, 98 flow [2024-10-11 19:46:44,447 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 30.333333333333332) internal successors, (273), 9 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:46:44,447 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:46:44,448 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:46:44,465 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-11 19:46:44,648 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:46:44,649 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-10-11 19:46:44,649 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:46:44,649 INFO L85 PathProgramCache]: Analyzing trace with hash -865737477, now seen corresponding path program 1 times [2024-10-11 19:46:44,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:46:44,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539493346] [2024-10-11 19:46:44,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:46:44,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:46:44,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:46:44,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:46:44,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:46:44,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539493346] [2024-10-11 19:46:44,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539493346] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:46:44,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:46:44,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 19:46:44,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921624726] [2024-10-11 19:46:44,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:46:44,722 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 19:46:44,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:46:44,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 19:46:44,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 19:46:44,728 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 87 [2024-10-11 19:46:44,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 38 transitions, 98 flow. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:46:44,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:46:44,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 87 [2024-10-11 19:46:44,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:46:44,891 INFO L124 PetriNetUnfolderBase]: 376/792 cut-off events. [2024-10-11 19:46:44,891 INFO L125 PetriNetUnfolderBase]: For 299/299 co-relation queries the response was YES. [2024-10-11 19:46:44,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1657 conditions, 792 events. 376/792 cut-off events. For 299/299 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 4210 event pairs, 286 based on Foata normal form. 0/776 useless extension candidates. Maximal degree in co-relation 1121. Up to 498 conditions per place. [2024-10-11 19:46:44,896 INFO L140 encePairwiseOnDemand]: 83/87 looper letters, 31 selfloop transitions, 3 changer transitions 0/47 dead transitions. [2024-10-11 19:46:44,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 47 transitions, 197 flow [2024-10-11 19:46:44,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 19:46:44,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 19:46:44,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 149 transitions. [2024-10-11 19:46:44,898 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4281609195402299 [2024-10-11 19:46:44,898 INFO L175 Difference]: Start difference. First operand has 48 places, 38 transitions, 98 flow. Second operand 4 states and 149 transitions. [2024-10-11 19:46:44,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 47 transitions, 197 flow [2024-10-11 19:46:44,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 47 transitions, 186 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-10-11 19:46:44,900 INFO L231 Difference]: Finished difference. Result has 45 places, 35 transitions, 91 flow [2024-10-11 19:46:44,900 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=91, PETRI_PLACES=45, PETRI_TRANSITIONS=35} [2024-10-11 19:46:44,901 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, -29 predicate places. [2024-10-11 19:46:44,902 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 35 transitions, 91 flow [2024-10-11 19:46:44,902 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:46:44,902 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:46:44,902 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1] [2024-10-11 19:46:44,902 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-11 19:46:44,903 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-10-11 19:46:44,903 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:46:44,903 INFO L85 PathProgramCache]: Analyzing trace with hash 234291792, now seen corresponding path program 1 times [2024-10-11 19:46:44,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:46:44,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070690369] [2024-10-11 19:46:44,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:46:44,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:46:44,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 19:46:44,924 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-11 19:46:44,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 19:46:44,939 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-11 19:46:44,939 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-11 19:46:44,940 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 9 remaining) [2024-10-11 19:46:44,940 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 9 remaining) [2024-10-11 19:46:44,940 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 9 remaining) [2024-10-11 19:46:44,940 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 9 remaining) [2024-10-11 19:46:44,940 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 9 remaining) [2024-10-11 19:46:44,941 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (3 of 9 remaining) [2024-10-11 19:46:44,941 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (2 of 9 remaining) [2024-10-11 19:46:44,941 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (1 of 9 remaining) [2024-10-11 19:46:44,941 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 9 remaining) [2024-10-11 19:46:44,941 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-11 19:46:44,942 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2024-10-11 19:46:44,942 WARN L239 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-11 19:46:44,942 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-10-11 19:46:44,975 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-10-11 19:46:44,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 93 places, 109 transitions, 245 flow [2024-10-11 19:46:45,005 INFO L124 PetriNetUnfolderBase]: 52/271 cut-off events. [2024-10-11 19:46:45,006 INFO L125 PetriNetUnfolderBase]: For 19/21 co-relation queries the response was YES. [2024-10-11 19:46:45,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 296 conditions, 271 events. 52/271 cut-off events. For 19/21 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1253 event pairs, 1 based on Foata normal form. 0/180 useless extension candidates. Maximal degree in co-relation 188. Up to 12 conditions per place. [2024-10-11 19:46:45,007 INFO L82 GeneralOperation]: Start removeDead. Operand has 93 places, 109 transitions, 245 flow [2024-10-11 19:46:45,011 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 93 places, 109 transitions, 245 flow [2024-10-11 19:46:45,012 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 19:46:45,013 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4d972ca8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 19:46:45,013 INFO L334 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2024-10-11 19:46:45,015 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 19:46:45,015 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-10-11 19:46:45,015 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 19:46:45,015 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:46:45,016 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-11 19:46:45,016 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2024-10-11 19:46:45,016 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:46:45,016 INFO L85 PathProgramCache]: Analyzing trace with hash 615975, now seen corresponding path program 1 times [2024-10-11 19:46:45,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:46:45,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874741066] [2024-10-11 19:46:45,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:46:45,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:46:45,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:46:45,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:46:45,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:46:45,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874741066] [2024-10-11 19:46:45,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874741066] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:46:45,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:46:45,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-11 19:46:45,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626585903] [2024-10-11 19:46:45,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:46:45,052 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:46:45,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:46:45,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:46:45,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:46:45,066 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 109 [2024-10-11 19:46:45,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 109 transitions, 245 flow. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:46:45,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:46:45,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 109 [2024-10-11 19:46:45,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:46:51,012 INFO L124 PetriNetUnfolderBase]: 44624/74164 cut-off events. [2024-10-11 19:46:51,013 INFO L125 PetriNetUnfolderBase]: For 1078/1078 co-relation queries the response was YES. [2024-10-11 19:46:51,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136836 conditions, 74164 events. 44624/74164 cut-off events. For 1078/1078 co-relation queries the response was YES. Maximal size of possible extension queue 2207. Compared 672218 event pairs, 38073 based on Foata normal form. 18973/89419 useless extension candidates. Maximal degree in co-relation 42401. Up to 55214 conditions per place. [2024-10-11 19:46:51,521 INFO L140 encePairwiseOnDemand]: 87/109 looper letters, 75 selfloop transitions, 2 changer transitions 0/110 dead transitions. [2024-10-11 19:46:51,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 110 transitions, 401 flow [2024-10-11 19:46:51,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:46:51,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:46:51,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 208 transitions. [2024-10-11 19:46:51,523 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.636085626911315 [2024-10-11 19:46:51,523 INFO L175 Difference]: Start difference. First operand has 93 places, 109 transitions, 245 flow. Second operand 3 states and 208 transitions. [2024-10-11 19:46:51,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 110 transitions, 401 flow [2024-10-11 19:46:51,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 110 transitions, 401 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-11 19:46:51,532 INFO L231 Difference]: Finished difference. Result has 90 places, 86 transitions, 203 flow [2024-10-11 19:46:51,532 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=203, PETRI_PLACES=90, PETRI_TRANSITIONS=86} [2024-10-11 19:46:51,533 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, -3 predicate places. [2024-10-11 19:46:51,533 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 86 transitions, 203 flow [2024-10-11 19:46:51,534 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:46:51,534 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:46:51,534 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-11 19:46:51,534 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-11 19:46:51,534 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2024-10-11 19:46:51,535 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:46:51,535 INFO L85 PathProgramCache]: Analyzing trace with hash 615976, now seen corresponding path program 1 times [2024-10-11 19:46:51,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:46:51,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525462126] [2024-10-11 19:46:51,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:46:51,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:46:51,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:46:51,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:46:51,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:46:51,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525462126] [2024-10-11 19:46:51,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525462126] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:46:51,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:46:51,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-11 19:46:51,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12826646] [2024-10-11 19:46:51,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:46:51,604 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:46:51,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:46:51,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:46:51,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:46:51,616 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 109 [2024-10-11 19:46:51,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 86 transitions, 203 flow. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:46:51,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:46:51,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 109 [2024-10-11 19:46:51,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:46:56,086 INFO L124 PetriNetUnfolderBase]: 42221/71131 cut-off events. [2024-10-11 19:46:56,087 INFO L125 PetriNetUnfolderBase]: For 2055/2065 co-relation queries the response was YES. [2024-10-11 19:46:56,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131389 conditions, 71131 events. 42221/71131 cut-off events. For 2055/2065 co-relation queries the response was YES. Maximal size of possible extension queue 2097. Compared 648351 event pairs, 26281 based on Foata normal form. 1/67430 useless extension candidates. Maximal degree in co-relation 115412. Up to 58588 conditions per place. [2024-10-11 19:46:56,779 INFO L140 encePairwiseOnDemand]: 105/109 looper letters, 60 selfloop transitions, 2 changer transitions 0/96 dead transitions. [2024-10-11 19:46:56,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 96 transitions, 347 flow [2024-10-11 19:46:56,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:46:56,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:46:56,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 172 transitions. [2024-10-11 19:46:56,781 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5259938837920489 [2024-10-11 19:46:56,781 INFO L175 Difference]: Start difference. First operand has 90 places, 86 transitions, 203 flow. Second operand 3 states and 172 transitions. [2024-10-11 19:46:56,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 96 transitions, 347 flow [2024-10-11 19:46:56,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 96 transitions, 343 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-11 19:46:56,857 INFO L231 Difference]: Finished difference. Result has 91 places, 87 transitions, 213 flow [2024-10-11 19:46:56,857 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=213, PETRI_PLACES=91, PETRI_TRANSITIONS=87} [2024-10-11 19:46:56,858 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, -2 predicate places. [2024-10-11 19:46:56,858 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 87 transitions, 213 flow [2024-10-11 19:46:56,859 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:46:56,859 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:46:56,859 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-10-11 19:46:56,859 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-10-11 19:46:56,859 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2024-10-11 19:46:56,860 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:46:56,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1950206533, now seen corresponding path program 1 times [2024-10-11 19:46:56,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:46:56,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674092146] [2024-10-11 19:46:56,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:46:56,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:46:56,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:46:56,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:46:56,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:46:56,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674092146] [2024-10-11 19:46:56,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674092146] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:46:56,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957448783] [2024-10-11 19:46:56,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:46:56,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:46:56,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:46:56,969 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:46:56,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-11 19:46:57,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:46:57,051 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-11 19:46:57,052 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:46:57,070 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-11 19:46:57,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:46:57,125 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:46:57,184 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:46:57,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957448783] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:46:57,185 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 19:46:57,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2024-10-11 19:46:57,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709261412] [2024-10-11 19:46:57,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 19:46:57,186 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 19:46:57,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:46:57,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 19:46:57,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-10-11 19:46:57,221 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 109 [2024-10-11 19:46:57,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 87 transitions, 213 flow. Second operand has 7 states, 7 states have (on average 37.42857142857143) internal successors, (262), 7 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:46:57,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:46:57,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 109 [2024-10-11 19:46:57,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:47:01,739 INFO L124 PetriNetUnfolderBase]: 42098/69536 cut-off events. [2024-10-11 19:47:01,739 INFO L125 PetriNetUnfolderBase]: For 4470/4470 co-relation queries the response was YES. [2024-10-11 19:47:01,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130203 conditions, 69536 events. 42098/69536 cut-off events. For 4470/4470 co-relation queries the response was YES. Maximal size of possible extension queue 2034. Compared 629052 event pairs, 791 based on Foata normal form. 828/67575 useless extension candidates. Maximal degree in co-relation 130127. Up to 47434 conditions per place. [2024-10-11 19:47:02,417 INFO L140 encePairwiseOnDemand]: 105/109 looper letters, 127 selfloop transitions, 6 changer transitions 0/166 dead transitions. [2024-10-11 19:47:02,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 166 transitions, 639 flow [2024-10-11 19:47:02,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 19:47:02,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 19:47:02,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 347 transitions. [2024-10-11 19:47:02,419 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5305810397553516 [2024-10-11 19:47:02,419 INFO L175 Difference]: Start difference. First operand has 91 places, 87 transitions, 213 flow. Second operand 6 states and 347 transitions. [2024-10-11 19:47:02,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 166 transitions, 639 flow [2024-10-11 19:47:02,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 166 transitions, 637 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-11 19:47:02,427 INFO L231 Difference]: Finished difference. Result has 94 places, 88 transitions, 227 flow [2024-10-11 19:47:02,427 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=227, PETRI_PLACES=94, PETRI_TRANSITIONS=88} [2024-10-11 19:47:02,427 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 1 predicate places. [2024-10-11 19:47:02,428 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 88 transitions, 227 flow [2024-10-11 19:47:02,428 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 37.42857142857143) internal successors, (262), 7 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:47:02,428 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:47:02,428 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:47:02,441 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-11 19:47:02,628 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:47:02,629 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2024-10-11 19:47:02,629 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:47:02,629 INFO L85 PathProgramCache]: Analyzing trace with hash 2029379279, now seen corresponding path program 1 times [2024-10-11 19:47:02,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:47:02,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953482272] [2024-10-11 19:47:02,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:47:02,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:47:02,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:47:02,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:47:02,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:47:02,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953482272] [2024-10-11 19:47:02,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953482272] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:47:02,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:47:02,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 19:47:02,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612946781] [2024-10-11 19:47:02,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:47:02,692 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 19:47:02,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:47:02,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 19:47:02,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 19:47:02,694 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 109 [2024-10-11 19:47:02,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 88 transitions, 227 flow. Second operand has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:47:02,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:47:02,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 109 [2024-10-11 19:47:02,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:47:10,061 INFO L124 PetriNetUnfolderBase]: 68744/113411 cut-off events. [2024-10-11 19:47:10,062 INFO L125 PetriNetUnfolderBase]: For 6982/7008 co-relation queries the response was YES. [2024-10-11 19:47:10,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212794 conditions, 113411 events. 68744/113411 cut-off events. For 6982/7008 co-relation queries the response was YES. Maximal size of possible extension queue 2175. Compared 1026394 event pairs, 22552 based on Foata normal form. 0/106036 useless extension candidates. Maximal degree in co-relation 120544. Up to 47254 conditions per place. [2024-10-11 19:47:10,746 INFO L140 encePairwiseOnDemand]: 103/109 looper letters, 159 selfloop transitions, 7 changer transitions 0/199 dead transitions. [2024-10-11 19:47:10,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 199 transitions, 834 flow [2024-10-11 19:47:10,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 19:47:10,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 19:47:10,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 342 transitions. [2024-10-11 19:47:10,748 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6275229357798165 [2024-10-11 19:47:10,748 INFO L175 Difference]: Start difference. First operand has 94 places, 88 transitions, 227 flow. Second operand 5 states and 342 transitions. [2024-10-11 19:47:10,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 199 transitions, 834 flow [2024-10-11 19:47:10,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 199 transitions, 807 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-10-11 19:47:10,755 INFO L231 Difference]: Finished difference. Result has 99 places, 93 transitions, 262 flow [2024-10-11 19:47:10,756 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=262, PETRI_PLACES=99, PETRI_TRANSITIONS=93} [2024-10-11 19:47:10,756 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 6 predicate places. [2024-10-11 19:47:10,756 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 93 transitions, 262 flow [2024-10-11 19:47:10,757 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:47:10,757 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:47:10,757 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:47:10,757 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-10-11 19:47:10,758 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2024-10-11 19:47:10,758 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:47:10,758 INFO L85 PathProgramCache]: Analyzing trace with hash -937932884, now seen corresponding path program 1 times [2024-10-11 19:47:10,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:47:10,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647804628] [2024-10-11 19:47:10,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:47:10,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:47:10,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:47:10,792 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 19:47:10,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:47:10,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647804628] [2024-10-11 19:47:10,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647804628] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:47:10,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:47:10,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 19:47:10,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649493395] [2024-10-11 19:47:10,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:47:10,793 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:47:10,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:47:10,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:47:10,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:47:10,795 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 109 [2024-10-11 19:47:10,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 93 transitions, 262 flow. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:47:10,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:47:10,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 109 [2024-10-11 19:47:10,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:47:20,875 INFO L124 PetriNetUnfolderBase]: 89926/148648 cut-off events. [2024-10-11 19:47:20,876 INFO L125 PetriNetUnfolderBase]: For 38742/40839 co-relation queries the response was YES. [2024-10-11 19:47:21,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 301368 conditions, 148648 events. 89926/148648 cut-off events. For 38742/40839 co-relation queries the response was YES. Maximal size of possible extension queue 3405. Compared 1422419 event pairs, 55844 based on Foata normal form. 0/142347 useless extension candidates. Maximal degree in co-relation 248201. Up to 86569 conditions per place. [2024-10-11 19:47:21,687 INFO L140 encePairwiseOnDemand]: 106/109 looper letters, 95 selfloop transitions, 3 changer transitions 0/133 dead transitions. [2024-10-11 19:47:21,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 133 transitions, 564 flow [2024-10-11 19:47:21,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:47:21,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:47:21,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 200 transitions. [2024-10-11 19:47:21,689 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6116207951070336 [2024-10-11 19:47:21,689 INFO L175 Difference]: Start difference. First operand has 99 places, 93 transitions, 262 flow. Second operand 3 states and 200 transitions. [2024-10-11 19:47:21,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 133 transitions, 564 flow [2024-10-11 19:47:21,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 133 transitions, 564 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-11 19:47:21,752 INFO L231 Difference]: Finished difference. Result has 102 places, 94 transitions, 277 flow [2024-10-11 19:47:21,752 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=277, PETRI_PLACES=102, PETRI_TRANSITIONS=94} [2024-10-11 19:47:21,753 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 9 predicate places. [2024-10-11 19:47:21,753 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 94 transitions, 277 flow [2024-10-11 19:47:21,753 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:47:21,753 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:47:21,753 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1] [2024-10-11 19:47:21,753 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-10-11 19:47:21,753 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2024-10-11 19:47:21,754 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:47:21,754 INFO L85 PathProgramCache]: Analyzing trace with hash -317673135, now seen corresponding path program 1 times [2024-10-11 19:47:21,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:47:21,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505281831] [2024-10-11 19:47:21,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:47:21,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:47:21,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 19:47:21,776 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-11 19:47:21,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 19:47:21,790 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-11 19:47:21,790 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-11 19:47:21,790 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 10 remaining) [2024-10-11 19:47:21,790 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 10 remaining) [2024-10-11 19:47:21,791 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 10 remaining) [2024-10-11 19:47:21,791 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 10 remaining) [2024-10-11 19:47:21,791 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 10 remaining) [2024-10-11 19:47:21,791 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (4 of 10 remaining) [2024-10-11 19:47:21,791 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (3 of 10 remaining) [2024-10-11 19:47:21,791 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (2 of 10 remaining) [2024-10-11 19:47:21,791 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (1 of 10 remaining) [2024-10-11 19:47:21,791 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 10 remaining) [2024-10-11 19:47:21,792 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-10-11 19:47:21,792 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2024-10-11 19:47:21,792 WARN L239 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-11 19:47:21,793 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-10-11 19:47:21,822 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-10-11 19:47:21,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 112 places, 131 transitions, 302 flow [2024-10-11 19:47:21,850 INFO L124 PetriNetUnfolderBase]: 77/409 cut-off events. [2024-10-11 19:47:21,850 INFO L125 PetriNetUnfolderBase]: For 48/51 co-relation queries the response was YES. [2024-10-11 19:47:21,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 460 conditions, 409 events. 77/409 cut-off events. For 48/51 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 2087 event pairs, 6 based on Foata normal form. 0/270 useless extension candidates. Maximal degree in co-relation 295. Up to 32 conditions per place. [2024-10-11 19:47:21,853 INFO L82 GeneralOperation]: Start removeDead. Operand has 112 places, 131 transitions, 302 flow [2024-10-11 19:47:21,859 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 112 places, 131 transitions, 302 flow [2024-10-11 19:47:21,860 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 19:47:21,860 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4d972ca8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 19:47:21,860 INFO L334 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2024-10-11 19:47:21,861 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 19:47:21,861 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-10-11 19:47:21,861 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 19:47:21,861 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:47:21,861 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-11 19:47:21,862 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-10-11 19:47:21,862 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:47:21,862 INFO L85 PathProgramCache]: Analyzing trace with hash 746058, now seen corresponding path program 1 times [2024-10-11 19:47:21,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:47:21,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153650140] [2024-10-11 19:47:21,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:47:21,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:47:21,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:47:21,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:47:21,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:47:21,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153650140] [2024-10-11 19:47:21,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153650140] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:47:21,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:47:21,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-11 19:47:21,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537409437] [2024-10-11 19:47:21,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:47:21,897 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:47:21,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:47:21,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:47:21,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:47:21,911 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 131 [2024-10-11 19:47:21,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 131 transitions, 302 flow. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:47:21,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:47:21,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 131 [2024-10-11 19:47:21,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand