./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/37_stack_lock_p0_vs_concur.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version fca748b1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/37_stack_lock_p0_vs_concur.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/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 62bb9e4cb3fb45378d7de513612dc08e0394f3048289be85bceda07932ec1175 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dd.update-z3-fca748b-m [2024-11-20 17:18:08,810 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-20 17:18:08,899 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-20 17:18:08,905 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-20 17:18:08,907 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-20 17:18:08,941 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-20 17:18:08,942 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-20 17:18:08,942 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-20 17:18:08,943 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-20 17:18:08,944 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-20 17:18:08,944 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-20 17:18:08,944 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-20 17:18:08,945 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-20 17:18:08,945 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-20 17:18:08,945 INFO L153 SettingsManager]: * Use SBE=true [2024-11-20 17:18:08,946 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-20 17:18:08,946 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-20 17:18:08,946 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-20 17:18:08,946 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-20 17:18:08,947 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-20 17:18:08,947 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-20 17:18:08,949 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-20 17:18:08,950 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-20 17:18:08,950 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-20 17:18:08,950 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-20 17:18:08,951 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-20 17:18:08,951 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-20 17:18:08,951 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-20 17:18:08,951 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-20 17:18:08,952 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-20 17:18:08,952 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-20 17:18:08,952 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-20 17:18:08,953 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-20 17:18:08,953 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 17:18:08,953 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-20 17:18:08,954 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-20 17:18:08,954 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-20 17:18:08,954 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-20 17:18:08,954 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-20 17:18:08,955 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-20 17:18:08,955 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-20 17:18:08,955 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-20 17:18:08,956 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 62bb9e4cb3fb45378d7de513612dc08e0394f3048289be85bceda07932ec1175 [2024-11-20 17:18:09,194 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-20 17:18:09,219 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-20 17:18:09,222 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-20 17:18:09,223 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-20 17:18:09,224 INFO L274 PluginConnector]: CDTParser initialized [2024-11-20 17:18:09,225 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/37_stack_lock_p0_vs_concur.i [2024-11-20 17:18:10,666 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-20 17:18:10,921 INFO L384 CDTParser]: Found 1 translation units. [2024-11-20 17:18:10,921 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/37_stack_lock_p0_vs_concur.i [2024-11-20 17:18:10,932 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a111bcd41/9d2c4cbaf30d44c2a052ba499f85130a/FLAGe038c90a5 [2024-11-20 17:18:11,234 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a111bcd41/9d2c4cbaf30d44c2a052ba499f85130a [2024-11-20 17:18:11,236 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-20 17:18:11,237 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-20 17:18:11,239 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-20 17:18:11,239 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-20 17:18:11,246 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-20 17:18:11,246 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:18:11" (1/1) ... [2024-11-20 17:18:11,247 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cc48e30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:18:11, skipping insertion in model container [2024-11-20 17:18:11,247 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:18:11" (1/1) ... [2024-11-20 17:18:11,301 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-20 17:18:11,623 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 17:18:11,643 INFO L200 MainTranslator]: Completed pre-run [2024-11-20 17:18:11,683 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 17:18:11,724 INFO L204 MainTranslator]: Completed translation [2024-11-20 17:18:11,725 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:18:11 WrapperNode [2024-11-20 17:18:11,725 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-20 17:18:11,726 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-20 17:18:11,726 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-20 17:18:11,726 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-20 17:18:11,733 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:18:11" (1/1) ... [2024-11-20 17:18:11,746 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:18:11" (1/1) ... [2024-11-20 17:18:11,773 INFO L138 Inliner]: procedures = 165, calls = 30, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 152 [2024-11-20 17:18:11,774 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-20 17:18:11,774 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-20 17:18:11,775 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-20 17:18:11,775 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-20 17:18:11,785 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:18:11" (1/1) ... [2024-11-20 17:18:11,785 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:18:11" (1/1) ... [2024-11-20 17:18:11,788 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:18:11" (1/1) ... [2024-11-20 17:18:11,801 INFO L175 MemorySlicer]: Split 14 memory accesses to 3 slices as follows [2, 5, 7]. 50 percent of accesses are in the largest equivalence class. The 8 initializations are split as follows [2, 5, 1]. The 2 writes are split as follows [0, 0, 2]. [2024-11-20 17:18:11,801 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:18:11" (1/1) ... [2024-11-20 17:18:11,801 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:18:11" (1/1) ... [2024-11-20 17:18:11,807 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:18:11" (1/1) ... [2024-11-20 17:18:11,810 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:18:11" (1/1) ... [2024-11-20 17:18:11,812 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:18:11" (1/1) ... [2024-11-20 17:18:11,813 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:18:11" (1/1) ... [2024-11-20 17:18:11,816 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-20 17:18:11,817 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-20 17:18:11,817 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-20 17:18:11,817 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-20 17:18:11,818 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:18:11" (1/1) ... [2024-11-20 17:18:11,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 17:18:11,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:18:11,846 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-20 17:18:11,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-20 17:18:11,890 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-20 17:18:11,890 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-20 17:18:11,890 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-20 17:18:11,890 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-11-20 17:18:11,891 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-11-20 17:18:11,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-20 17:18:11,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-20 17:18:11,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-20 17:18:11,891 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-20 17:18:11,891 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-20 17:18:11,891 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-20 17:18:11,891 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-20 17:18:11,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-20 17:18:11,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-20 17:18:11,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-20 17:18:11,892 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-20 17:18:11,892 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-20 17:18:11,893 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-20 17:18:11,894 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-20 17:18:12,013 INFO L238 CfgBuilder]: Building ICFG [2024-11-20 17:18:12,016 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-20 17:18:12,345 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-20 17:18:12,345 INFO L287 CfgBuilder]: Performing block encoding [2024-11-20 17:18:12,726 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-20 17:18:12,727 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-20 17:18:12,727 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:18:12 BoogieIcfgContainer [2024-11-20 17:18:12,728 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-20 17:18:12,731 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-20 17:18:12,732 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-20 17:18:12,735 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-20 17:18:12,735 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 05:18:11" (1/3) ... [2024-11-20 17:18:12,736 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b0b2b7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:18:12, skipping insertion in model container [2024-11-20 17:18:12,736 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:18:11" (2/3) ... [2024-11-20 17:18:12,736 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b0b2b7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:18:12, skipping insertion in model container [2024-11-20 17:18:12,736 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:18:12" (3/3) ... [2024-11-20 17:18:12,737 INFO L112 eAbstractionObserver]: Analyzing ICFG 37_stack_lock_p0_vs_concur.i [2024-11-20 17:18:12,756 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-20 17:18:12,756 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2024-11-20 17:18:12,756 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-20 17:18:12,825 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-20 17:18:12,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 49 places, 50 transitions, 104 flow [2024-11-20 17:18:12,890 INFO L124 PetriNetUnfolderBase]: 4/54 cut-off events. [2024-11-20 17:18:12,890 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-20 17:18:12,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 54 events. 4/54 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 131 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2024-11-20 17:18:12,893 INFO L82 GeneralOperation]: Start removeDead. Operand has 49 places, 50 transitions, 104 flow [2024-11-20 17:18:12,897 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 49 places, 50 transitions, 104 flow [2024-11-20 17:18:12,906 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-20 17:18:12,912 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;@58b2839e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-20 17:18:12,912 INFO L334 AbstractCegarLoop]: Starting to check reachability of 32 error locations. [2024-11-20 17:18:12,917 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-20 17:18:12,917 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-11-20 17:18:12,917 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-20 17:18:12,917 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:18:12,918 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-20 17:18:12,918 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2024-11-20 17:18:12,923 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:18:12,923 INFO L85 PathProgramCache]: Analyzing trace with hash 447730, now seen corresponding path program 1 times [2024-11-20 17:18:12,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:18:12,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744103696] [2024-11-20 17:18:12,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:18:12,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:18:13,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:18:13,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:18:13,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:18:13,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744103696] [2024-11-20 17:18:13,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744103696] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:18:13,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:18:13,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 17:18:13,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691201359] [2024-11-20 17:18:13,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:18:13,679 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-20 17:18:13,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:18:13,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-20 17:18:13,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-20 17:18:13,726 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 50 [2024-11-20 17:18:13,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 50 transitions, 104 flow. Second operand has 2 states, 2 states have (on average 23.0) internal successors, (46), 2 states have internal predecessors, (46), 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) [2024-11-20 17:18:13,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:18:13,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 50 [2024-11-20 17:18:13,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:18:13,850 INFO L124 PetriNetUnfolderBase]: 37/152 cut-off events. [2024-11-20 17:18:13,851 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-20 17:18:13,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 249 conditions, 152 events. 37/152 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 497 event pairs, 34 based on Foata normal form. 6/125 useless extension candidates. Maximal degree in co-relation 236. Up to 93 conditions per place. [2024-11-20 17:18:13,856 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 21 selfloop transitions, 0 changer transitions 0/42 dead transitions. [2024-11-20 17:18:13,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 42 transitions, 130 flow [2024-11-20 17:18:13,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-20 17:18:13,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-20 17:18:13,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 70 transitions. [2024-11-20 17:18:13,869 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7 [2024-11-20 17:18:13,871 INFO L175 Difference]: Start difference. First operand has 49 places, 50 transitions, 104 flow. Second operand 2 states and 70 transitions. [2024-11-20 17:18:13,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 42 transitions, 130 flow [2024-11-20 17:18:13,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 42 transitions, 130 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-20 17:18:13,878 INFO L231 Difference]: Finished difference. Result has 45 places, 42 transitions, 88 flow [2024-11-20 17:18:13,881 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=88, PETRI_PLACES=45, PETRI_TRANSITIONS=42} [2024-11-20 17:18:13,884 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, -4 predicate places. [2024-11-20 17:18:13,885 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 42 transitions, 88 flow [2024-11-20 17:18:13,885 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 23.0) internal successors, (46), 2 states have internal predecessors, (46), 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) [2024-11-20 17:18:13,885 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:18:13,885 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-20 17:18:13,885 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-20 17:18:13,886 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2024-11-20 17:18:13,886 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:18:13,888 INFO L85 PathProgramCache]: Analyzing trace with hash 455001407, now seen corresponding path program 1 times [2024-11-20 17:18:13,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:18:13,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351364613] [2024-11-20 17:18:13,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:18:13,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:18:14,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-20 17:18:14,280 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-20 17:18:14,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-20 17:18:14,346 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-20 17:18:14,346 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-20 17:18:14,348 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (31 of 32 remaining) [2024-11-20 17:18:14,349 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 32 remaining) [2024-11-20 17:18:14,350 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 32 remaining) [2024-11-20 17:18:14,350 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 32 remaining) [2024-11-20 17:18:14,350 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 32 remaining) [2024-11-20 17:18:14,351 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 32 remaining) [2024-11-20 17:18:14,351 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 32 remaining) [2024-11-20 17:18:14,351 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 32 remaining) [2024-11-20 17:18:14,352 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 32 remaining) [2024-11-20 17:18:14,352 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONARRAY_INDEX (22 of 32 remaining) [2024-11-20 17:18:14,353 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 32 remaining) [2024-11-20 17:18:14,353 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 32 remaining) [2024-11-20 17:18:14,353 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONARRAY_INDEX (19 of 32 remaining) [2024-11-20 17:18:14,354 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14ASSERT_VIOLATIONMEMORY_LEAK (18 of 32 remaining) [2024-11-20 17:18:14,354 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 32 remaining) [2024-11-20 17:18:14,355 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 32 remaining) [2024-11-20 17:18:14,355 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (15 of 32 remaining) [2024-11-20 17:18:14,355 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 32 remaining) [2024-11-20 17:18:14,356 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 32 remaining) [2024-11-20 17:18:14,356 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 32 remaining) [2024-11-20 17:18:14,356 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 32 remaining) [2024-11-20 17:18:14,356 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 32 remaining) [2024-11-20 17:18:14,357 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 32 remaining) [2024-11-20 17:18:14,357 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 32 remaining) [2024-11-20 17:18:14,357 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 32 remaining) [2024-11-20 17:18:14,357 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONARRAY_INDEX (6 of 32 remaining) [2024-11-20 17:18:14,358 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 32 remaining) [2024-11-20 17:18:14,358 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 32 remaining) [2024-11-20 17:18:14,358 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONARRAY_INDEX (3 of 32 remaining) [2024-11-20 17:18:14,358 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14ASSERT_VIOLATIONMEMORY_LEAK (2 of 32 remaining) [2024-11-20 17:18:14,359 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 32 remaining) [2024-11-20 17:18:14,359 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 32 remaining) [2024-11-20 17:18:14,359 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-20 17:18:14,359 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1] [2024-11-20 17:18:14,364 WARN L244 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-20 17:18:14,365 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-20 17:18:14,423 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-20 17:18:14,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 90 places, 93 transitions, 196 flow [2024-11-20 17:18:14,460 INFO L124 PetriNetUnfolderBase]: 8/102 cut-off events. [2024-11-20 17:18:14,460 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-20 17:18:14,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110 conditions, 102 events. 8/102 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 384 event pairs, 0 based on Foata normal form. 0/58 useless extension candidates. Maximal degree in co-relation 89. Up to 3 conditions per place. [2024-11-20 17:18:14,462 INFO L82 GeneralOperation]: Start removeDead. Operand has 90 places, 93 transitions, 196 flow [2024-11-20 17:18:14,464 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 90 places, 93 transitions, 196 flow [2024-11-20 17:18:14,465 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-20 17:18:14,466 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;@58b2839e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-20 17:18:14,466 INFO L334 AbstractCegarLoop]: Starting to check reachability of 47 error locations. [2024-11-20 17:18:14,470 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-20 17:18:14,470 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-11-20 17:18:14,470 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-20 17:18:14,470 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:18:14,470 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-20 17:18:14,471 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-20 17:18:14,471 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:18:14,474 INFO L85 PathProgramCache]: Analyzing trace with hash 540079, now seen corresponding path program 1 times [2024-11-20 17:18:14,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:18:14,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349170166] [2024-11-20 17:18:14,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:18:14,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:18:14,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:18:14,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:18:14,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:18:14,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349170166] [2024-11-20 17:18:14,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349170166] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:18:14,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:18:14,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 17:18:14,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568199413] [2024-11-20 17:18:14,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:18:14,814 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-20 17:18:14,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:18:14,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-20 17:18:14,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-20 17:18:14,817 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 93 [2024-11-20 17:18:14,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 93 transitions, 196 flow. Second operand has 2 states, 2 states have (on average 43.0) internal successors, (86), 2 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:18:14,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:18:14,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 93 [2024-11-20 17:18:14,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:18:15,391 INFO L124 PetriNetUnfolderBase]: 1675/3949 cut-off events. [2024-11-20 17:18:15,392 INFO L125 PetriNetUnfolderBase]: For 54/54 co-relation queries the response was YES. [2024-11-20 17:18:15,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6709 conditions, 3949 events. 1675/3949 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 28899 event pairs, 1564 based on Foata normal form. 219/3345 useless extension candidates. Maximal degree in co-relation 6023. Up to 2701 conditions per place. [2024-11-20 17:18:15,426 INFO L140 encePairwiseOnDemand]: 84/93 looper letters, 39 selfloop transitions, 0 changer transitions 0/80 dead transitions. [2024-11-20 17:18:15,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 80 transitions, 248 flow [2024-11-20 17:18:15,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-20 17:18:15,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-20 17:18:15,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 132 transitions. [2024-11-20 17:18:15,429 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7096774193548387 [2024-11-20 17:18:15,429 INFO L175 Difference]: Start difference. First operand has 90 places, 93 transitions, 196 flow. Second operand 2 states and 132 transitions. [2024-11-20 17:18:15,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 80 transitions, 248 flow [2024-11-20 17:18:15,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 80 transitions, 248 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-20 17:18:15,433 INFO L231 Difference]: Finished difference. Result has 84 places, 80 transitions, 170 flow [2024-11-20 17:18:15,434 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=170, PETRI_PLACES=84, PETRI_TRANSITIONS=80} [2024-11-20 17:18:15,434 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, -6 predicate places. [2024-11-20 17:18:15,434 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 80 transitions, 170 flow [2024-11-20 17:18:15,435 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 43.0) internal successors, (86), 2 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:18:15,435 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:18:15,435 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-20 17:18:15,435 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-20 17:18:15,435 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-20 17:18:15,436 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:18:15,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1087404524, now seen corresponding path program 1 times [2024-11-20 17:18:15,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:18:15,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613830702] [2024-11-20 17:18:15,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:18:15,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:18:15,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:18:15,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:18:15,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:18:15,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613830702] [2024-11-20 17:18:15,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613830702] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:18:15,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:18:15,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-20 17:18:15,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883125404] [2024-11-20 17:18:15,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:18:15,968 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:18:15,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:18:15,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:18:15,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:18:15,970 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 93 [2024-11-20 17:18:15,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 80 transitions, 170 flow. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 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) [2024-11-20 17:18:15,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:18:15,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 93 [2024-11-20 17:18:15,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:18:16,388 INFO L124 PetriNetUnfolderBase]: 1759/4111 cut-off events. [2024-11-20 17:18:16,389 INFO L125 PetriNetUnfolderBase]: For 63/63 co-relation queries the response was YES. [2024-11-20 17:18:16,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7022 conditions, 4111 events. 1759/4111 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 30250 event pairs, 612 based on Foata normal form. 0/3237 useless extension candidates. Maximal degree in co-relation 7017. Up to 2714 conditions per place. [2024-11-20 17:18:16,417 INFO L140 encePairwiseOnDemand]: 86/93 looper letters, 47 selfloop transitions, 3 changer transitions 0/91 dead transitions. [2024-11-20 17:18:16,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 91 transitions, 297 flow [2024-11-20 17:18:16,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:18:16,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:18:16,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 180 transitions. [2024-11-20 17:18:16,420 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6451612903225806 [2024-11-20 17:18:16,420 INFO L175 Difference]: Start difference. First operand has 84 places, 80 transitions, 170 flow. Second operand 3 states and 180 transitions. [2024-11-20 17:18:16,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 91 transitions, 297 flow [2024-11-20 17:18:16,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 91 transitions, 297 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-20 17:18:16,424 INFO L231 Difference]: Finished difference. Result has 87 places, 82 transitions, 195 flow [2024-11-20 17:18:16,424 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=195, PETRI_PLACES=87, PETRI_TRANSITIONS=82} [2024-11-20 17:18:16,427 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, -3 predicate places. [2024-11-20 17:18:16,427 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 82 transitions, 195 flow [2024-11-20 17:18:16,427 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 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) [2024-11-20 17:18:16,427 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:18:16,427 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-20 17:18:16,428 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-20 17:18:16,428 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-20 17:18:16,428 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:18:16,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1087404522, now seen corresponding path program 1 times [2024-11-20 17:18:16,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:18:16,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951983363] [2024-11-20 17:18:16,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:18:16,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:18:16,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:18:16,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:18:16,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:18:16,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951983363] [2024-11-20 17:18:16,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951983363] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:18:16,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:18:16,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 17:18:16,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679918693] [2024-11-20 17:18:16,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:18:16,709 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:18:16,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:18:16,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:18:16,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:18:16,744 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 93 [2024-11-20 17:18:16,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 82 transitions, 195 flow. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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) [2024-11-20 17:18:16,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:18:16,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 93 [2024-11-20 17:18:16,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:18:17,542 INFO L124 PetriNetUnfolderBase]: 3529/7485 cut-off events. [2024-11-20 17:18:17,545 INFO L125 PetriNetUnfolderBase]: For 178/178 co-relation queries the response was YES. [2024-11-20 17:18:17,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13896 conditions, 7485 events. 3529/7485 cut-off events. For 178/178 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 55414 event pairs, 1644 based on Foata normal form. 0/6136 useless extension candidates. Maximal degree in co-relation 13889. Up to 3218 conditions per place. [2024-11-20 17:18:17,602 INFO L140 encePairwiseOnDemand]: 79/93 looper letters, 75 selfloop transitions, 8 changer transitions 0/117 dead transitions. [2024-11-20 17:18:17,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 117 transitions, 449 flow [2024-11-20 17:18:17,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:18:17,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:18:17,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 191 transitions. [2024-11-20 17:18:17,605 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6845878136200717 [2024-11-20 17:18:17,605 INFO L175 Difference]: Start difference. First operand has 87 places, 82 transitions, 195 flow. Second operand 3 states and 191 transitions. [2024-11-20 17:18:17,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 117 transitions, 449 flow [2024-11-20 17:18:17,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 117 transitions, 445 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 17:18:17,612 INFO L231 Difference]: Finished difference. Result has 90 places, 89 transitions, 266 flow [2024-11-20 17:18:17,612 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=266, PETRI_PLACES=90, PETRI_TRANSITIONS=89} [2024-11-20 17:18:17,614 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 0 predicate places. [2024-11-20 17:18:17,614 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 89 transitions, 266 flow [2024-11-20 17:18:17,615 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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) [2024-11-20 17:18:17,615 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:18:17,615 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-20 17:18:17,615 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-20 17:18:17,615 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-20 17:18:17,616 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:18:17,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1087404521, now seen corresponding path program 1 times [2024-11-20 17:18:17,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:18:17,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836446574] [2024-11-20 17:18:17,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:18:17,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:18:17,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:18:18,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:18:18,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:18:18,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836446574] [2024-11-20 17:18:18,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836446574] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:18:18,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:18:18,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 17:18:18,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473418244] [2024-11-20 17:18:18,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:18:18,121 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:18:18,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:18:18,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:18:18,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:18:18,161 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 93 [2024-11-20 17:18:18,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 89 transitions, 266 flow. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:18:18,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:18:18,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 93 [2024-11-20 17:18:18,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:18:18,739 INFO L124 PetriNetUnfolderBase]: 2543/5677 cut-off events. [2024-11-20 17:18:18,739 INFO L125 PetriNetUnfolderBase]: For 1528/1573 co-relation queries the response was YES. [2024-11-20 17:18:18,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11334 conditions, 5677 events. 2543/5677 cut-off events. For 1528/1573 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 41371 event pairs, 1015 based on Foata normal form. 663/5609 useless extension candidates. Maximal degree in co-relation 11326. Up to 3310 conditions per place. [2024-11-20 17:18:18,771 INFO L140 encePairwiseOnDemand]: 85/93 looper letters, 61 selfloop transitions, 3 changer transitions 0/104 dead transitions. [2024-11-20 17:18:18,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 104 transitions, 437 flow [2024-11-20 17:18:18,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:18:18,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:18:18,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 177 transitions. [2024-11-20 17:18:18,773 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6344086021505376 [2024-11-20 17:18:18,774 INFO L175 Difference]: Start difference. First operand has 90 places, 89 transitions, 266 flow. Second operand 3 states and 177 transitions. [2024-11-20 17:18:18,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 104 transitions, 437 flow [2024-11-20 17:18:18,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 104 transitions, 421 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:18:18,784 INFO L231 Difference]: Finished difference. Result has 84 places, 83 transitions, 242 flow [2024-11-20 17:18:18,784 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=242, PETRI_PLACES=84, PETRI_TRANSITIONS=83} [2024-11-20 17:18:18,785 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, -6 predicate places. [2024-11-20 17:18:18,785 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 83 transitions, 242 flow [2024-11-20 17:18:18,787 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:18:18,787 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:18:18,787 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2024-11-20 17:18:18,787 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-20 17:18:18,787 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-20 17:18:18,788 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:18:18,789 INFO L85 PathProgramCache]: Analyzing trace with hash 620095070, now seen corresponding path program 1 times [2024-11-20 17:18:18,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:18:18,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770122] [2024-11-20 17:18:18,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:18:18,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:18:19,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-20 17:18:19,027 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-20 17:18:19,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-20 17:18:19,044 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-20 17:18:19,044 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-20 17:18:19,045 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (46 of 47 remaining) [2024-11-20 17:18:19,045 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 47 remaining) [2024-11-20 17:18:19,045 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 47 remaining) [2024-11-20 17:18:19,045 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 47 remaining) [2024-11-20 17:18:19,045 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 47 remaining) [2024-11-20 17:18:19,046 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 47 remaining) [2024-11-20 17:18:19,046 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 47 remaining) [2024-11-20 17:18:19,046 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 47 remaining) [2024-11-20 17:18:19,046 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 47 remaining) [2024-11-20 17:18:19,046 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONARRAY_INDEX (37 of 47 remaining) [2024-11-20 17:18:19,047 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 47 remaining) [2024-11-20 17:18:19,047 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 47 remaining) [2024-11-20 17:18:19,047 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONARRAY_INDEX (34 of 47 remaining) [2024-11-20 17:18:19,047 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14ASSERT_VIOLATIONMEMORY_LEAK (33 of 47 remaining) [2024-11-20 17:18:19,047 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 47 remaining) [2024-11-20 17:18:19,047 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 47 remaining) [2024-11-20 17:18:19,048 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (30 of 47 remaining) [2024-11-20 17:18:19,048 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 47 remaining) [2024-11-20 17:18:19,048 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 47 remaining) [2024-11-20 17:18:19,048 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 47 remaining) [2024-11-20 17:18:19,048 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 47 remaining) [2024-11-20 17:18:19,048 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 47 remaining) [2024-11-20 17:18:19,049 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 47 remaining) [2024-11-20 17:18:19,049 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 47 remaining) [2024-11-20 17:18:19,049 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 47 remaining) [2024-11-20 17:18:19,049 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONARRAY_INDEX (21 of 47 remaining) [2024-11-20 17:18:19,049 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 47 remaining) [2024-11-20 17:18:19,050 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 47 remaining) [2024-11-20 17:18:19,050 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONARRAY_INDEX (18 of 47 remaining) [2024-11-20 17:18:19,050 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14ASSERT_VIOLATIONMEMORY_LEAK (17 of 47 remaining) [2024-11-20 17:18:19,050 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 47 remaining) [2024-11-20 17:18:19,050 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 47 remaining) [2024-11-20 17:18:19,050 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 47 remaining) [2024-11-20 17:18:19,051 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 47 remaining) [2024-11-20 17:18:19,051 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 47 remaining) [2024-11-20 17:18:19,051 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 47 remaining) [2024-11-20 17:18:19,051 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 47 remaining) [2024-11-20 17:18:19,051 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 47 remaining) [2024-11-20 17:18:19,051 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 47 remaining) [2024-11-20 17:18:19,052 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 47 remaining) [2024-11-20 17:18:19,052 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONARRAY_INDEX (6 of 47 remaining) [2024-11-20 17:18:19,052 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 47 remaining) [2024-11-20 17:18:19,052 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 47 remaining) [2024-11-20 17:18:19,052 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONARRAY_INDEX (3 of 47 remaining) [2024-11-20 17:18:19,052 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14ASSERT_VIOLATIONMEMORY_LEAK (2 of 47 remaining) [2024-11-20 17:18:19,053 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 47 remaining) [2024-11-20 17:18:19,053 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 47 remaining) [2024-11-20 17:18:19,053 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-20 17:18:19,053 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2024-11-20 17:18:19,054 WARN L244 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-20 17:18:19,054 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-11-20 17:18:19,146 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-20 17:18:19,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 131 places, 136 transitions, 290 flow [2024-11-20 17:18:19,170 INFO L124 PetriNetUnfolderBase]: 12/150 cut-off events. [2024-11-20 17:18:19,170 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-20 17:18:19,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163 conditions, 150 events. 12/150 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 662 event pairs, 0 based on Foata normal form. 0/85 useless extension candidates. Maximal degree in co-relation 131. Up to 4 conditions per place. [2024-11-20 17:18:19,171 INFO L82 GeneralOperation]: Start removeDead. Operand has 131 places, 136 transitions, 290 flow [2024-11-20 17:18:19,174 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 131 places, 136 transitions, 290 flow [2024-11-20 17:18:19,175 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-20 17:18:19,176 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;@58b2839e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-20 17:18:19,176 INFO L334 AbstractCegarLoop]: Starting to check reachability of 62 error locations. [2024-11-20 17:18:19,180 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-20 17:18:19,180 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-11-20 17:18:19,180 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-20 17:18:19,180 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:18:19,180 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-20 17:18:19,180 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-11-20 17:18:19,181 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:18:19,181 INFO L85 PathProgramCache]: Analyzing trace with hash 675127, now seen corresponding path program 1 times [2024-11-20 17:18:19,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:18:19,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468665685] [2024-11-20 17:18:19,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:18:19,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:18:19,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:18:19,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:18:19,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:18:19,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468665685] [2024-11-20 17:18:19,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468665685] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:18:19,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:18:19,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 17:18:19,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441534224] [2024-11-20 17:18:19,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:18:19,435 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-20 17:18:19,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:18:19,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-20 17:18:19,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-20 17:18:19,436 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 136 [2024-11-20 17:18:19,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 136 transitions, 290 flow. Second operand has 2 states, 2 states have (on average 63.0) internal successors, (126), 2 states have internal predecessors, (126), 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) [2024-11-20 17:18:19,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:18:19,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 136 [2024-11-20 17:18:19,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:18:26,335 INFO L124 PetriNetUnfolderBase]: 48655/90651 cut-off events. [2024-11-20 17:18:26,335 INFO L125 PetriNetUnfolderBase]: For 2090/2090 co-relation queries the response was YES. [2024-11-20 17:18:26,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159166 conditions, 90651 events. 48655/90651 cut-off events. For 2090/2090 co-relation queries the response was YES. Maximal size of possible extension queue 2059. Compared 896622 event pairs, 45628 based on Foata normal form. 5916/78704 useless extension candidates. Maximal degree in co-relation 79316. Up to 67159 conditions per place. [2024-11-20 17:18:27,082 INFO L140 encePairwiseOnDemand]: 123/136 looper letters, 57 selfloop transitions, 0 changer transitions 0/118 dead transitions. [2024-11-20 17:18:27,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 118 transitions, 368 flow [2024-11-20 17:18:27,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-20 17:18:27,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-20 17:18:27,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 194 transitions. [2024-11-20 17:18:27,084 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7132352941176471 [2024-11-20 17:18:27,084 INFO L175 Difference]: Start difference. First operand has 131 places, 136 transitions, 290 flow. Second operand 2 states and 194 transitions. [2024-11-20 17:18:27,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 118 transitions, 368 flow [2024-11-20 17:18:27,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 118 transitions, 366 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-11-20 17:18:27,091 INFO L231 Difference]: Finished difference. Result has 123 places, 118 transitions, 252 flow [2024-11-20 17:18:27,092 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=252, PETRI_PLACES=123, PETRI_TRANSITIONS=118} [2024-11-20 17:18:27,092 INFO L277 CegarLoopForPetriNet]: 131 programPoint places, -8 predicate places. [2024-11-20 17:18:27,092 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 118 transitions, 252 flow [2024-11-20 17:18:27,093 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 63.0) internal successors, (126), 2 states have internal predecessors, (126), 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) [2024-11-20 17:18:27,093 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:18:27,093 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-20 17:18:27,093 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-20 17:18:27,093 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-11-20 17:18:27,094 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:18:27,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1357770582, now seen corresponding path program 1 times [2024-11-20 17:18:27,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:18:27,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029517825] [2024-11-20 17:18:27,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:18:27,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:18:27,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:18:27,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:18:27,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:18:27,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029517825] [2024-11-20 17:18:27,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029517825] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:18:27,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:18:27,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-20 17:18:27,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349531263] [2024-11-20 17:18:27,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:18:27,500 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:18:27,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:18:27,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:18:27,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:18:27,502 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 136 [2024-11-20 17:18:27,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 118 transitions, 252 flow. Second operand has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 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) [2024-11-20 17:18:27,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:18:27,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 136 [2024-11-20 17:18:27,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:18:33,704 INFO L124 PetriNetUnfolderBase]: 49258/91539 cut-off events. [2024-11-20 17:18:33,704 INFO L125 PetriNetUnfolderBase]: For 1116/1116 co-relation queries the response was YES. [2024-11-20 17:18:33,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160652 conditions, 91539 events. 49258/91539 cut-off events. For 1116/1116 co-relation queries the response was YES. Maximal size of possible extension queue 2238. Compared 907517 event pairs, 23334 based on Foata normal form. 0/73415 useless extension candidates. Maximal degree in co-relation 160646. Up to 67322 conditions per place. [2024-11-20 17:18:34,285 INFO L140 encePairwiseOnDemand]: 126/136 looper letters, 69 selfloop transitions, 4 changer transitions 0/134 dead transitions. [2024-11-20 17:18:34,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 134 transitions, 440 flow [2024-11-20 17:18:34,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:18:34,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:18:34,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 265 transitions. [2024-11-20 17:18:34,287 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6495098039215687 [2024-11-20 17:18:34,287 INFO L175 Difference]: Start difference. First operand has 123 places, 118 transitions, 252 flow. Second operand 3 states and 265 transitions. [2024-11-20 17:18:34,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 134 transitions, 440 flow [2024-11-20 17:18:34,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 134 transitions, 440 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-20 17:18:34,291 INFO L231 Difference]: Finished difference. Result has 126 places, 121 transitions, 288 flow [2024-11-20 17:18:34,291 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=288, PETRI_PLACES=126, PETRI_TRANSITIONS=121} [2024-11-20 17:18:34,292 INFO L277 CegarLoopForPetriNet]: 131 programPoint places, -5 predicate places. [2024-11-20 17:18:34,292 INFO L471 AbstractCegarLoop]: Abstraction has has 126 places, 121 transitions, 288 flow [2024-11-20 17:18:34,292 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 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) [2024-11-20 17:18:34,293 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:18:34,293 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-20 17:18:34,293 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-20 17:18:34,293 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-11-20 17:18:34,293 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:18:34,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1357770580, now seen corresponding path program 1 times [2024-11-20 17:18:34,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:18:34,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152575203] [2024-11-20 17:18:34,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:18:34,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:18:34,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:18:34,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:18:34,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:18:34,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152575203] [2024-11-20 17:18:34,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152575203] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:18:34,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:18:34,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 17:18:34,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858319882] [2024-11-20 17:18:34,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:18:34,688 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:18:34,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:18:34,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:18:34,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:18:34,732 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 136 [2024-11-20 17:18:34,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 121 transitions, 288 flow. Second operand has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:18:34,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:18:34,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 136 [2024-11-20 17:18:34,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:18:48,344 INFO L124 PetriNetUnfolderBase]: 105512/182402 cut-off events. [2024-11-20 17:18:48,345 INFO L125 PetriNetUnfolderBase]: For 6244/6244 co-relation queries the response was YES. [2024-11-20 17:18:48,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 348576 conditions, 182402 events. 105512/182402 cut-off events. For 6244/6244 co-relation queries the response was YES. Maximal size of possible extension queue 3751. Compared 1811939 event pairs, 52476 based on Foata normal form. 0/149783 useless extension candidates. Maximal degree in co-relation 348568. Up to 88326 conditions per place. [2024-11-20 17:18:49,514 INFO L140 encePairwiseOnDemand]: 121/136 looper letters, 112 selfloop transitions, 9 changer transitions 0/175 dead transitions. [2024-11-20 17:18:49,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 175 transitions, 670 flow [2024-11-20 17:18:49,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:18:49,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:18:49,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 287 transitions. [2024-11-20 17:18:49,516 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7034313725490197 [2024-11-20 17:18:49,517 INFO L175 Difference]: Start difference. First operand has 126 places, 121 transitions, 288 flow. Second operand 3 states and 287 transitions. [2024-11-20 17:18:49,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 175 transitions, 670 flow [2024-11-20 17:18:49,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 175 transitions, 664 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 17:18:49,524 INFO L231 Difference]: Finished difference. Result has 129 places, 129 transitions, 366 flow [2024-11-20 17:18:49,524 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=366, PETRI_PLACES=129, PETRI_TRANSITIONS=129} [2024-11-20 17:18:49,525 INFO L277 CegarLoopForPetriNet]: 131 programPoint places, -2 predicate places. [2024-11-20 17:18:49,525 INFO L471 AbstractCegarLoop]: Abstraction has has 129 places, 129 transitions, 366 flow [2024-11-20 17:18:49,525 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:18:49,526 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:18:49,526 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-20 17:18:49,526 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-20 17:18:49,526 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-11-20 17:18:49,526 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:18:49,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1357770579, now seen corresponding path program 1 times [2024-11-20 17:18:49,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:18:49,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847547803] [2024-11-20 17:18:49,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:18:49,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:18:49,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:18:50,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:18:50,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:18:50,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847547803] [2024-11-20 17:18:50,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847547803] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:18:50,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:18:50,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 17:18:50,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45054151] [2024-11-20 17:18:50,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:18:50,017 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:18:50,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:18:50,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:18:50,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:18:50,056 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 136 [2024-11-20 17:18:50,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 129 transitions, 366 flow. Second operand has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 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) [2024-11-20 17:18:50,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:18:50,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 136 [2024-11-20 17:18:50,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand