./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/09_fmaxsym-pthread.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a046e57d 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/09_fmaxsym-pthread.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 e78822126ecf610a8f2b081cd67f0280b0032e707126b95c500c0e8fa18b6e03 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-13 12:10:01,651 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-13 12:10:01,737 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-13 12:10:01,741 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-13 12:10:01,743 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-13 12:10:01,771 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-13 12:10:01,772 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-13 12:10:01,772 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-13 12:10:01,773 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-13 12:10:01,774 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-13 12:10:01,774 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-13 12:10:01,774 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-13 12:10:01,775 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-13 12:10:01,775 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-13 12:10:01,776 INFO L153 SettingsManager]: * Use SBE=true [2024-10-13 12:10:01,776 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-13 12:10:01,777 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-13 12:10:01,777 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-13 12:10:01,777 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-13 12:10:01,778 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-13 12:10:01,778 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-13 12:10:01,779 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-13 12:10:01,779 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-13 12:10:01,780 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-13 12:10:01,780 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-13 12:10:01,781 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-13 12:10:01,781 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-13 12:10:01,781 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-13 12:10:01,782 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-13 12:10:01,782 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-13 12:10:01,783 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-13 12:10:01,783 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-13 12:10:01,783 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-13 12:10:01,784 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 12:10:01,784 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-13 12:10:01,784 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-13 12:10:01,785 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-13 12:10:01,785 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-13 12:10:01,785 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-13 12:10:01,786 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-13 12:10:01,786 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-13 12:10:01,787 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-13 12:10:01,787 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e78822126ecf610a8f2b081cd67f0280b0032e707126b95c500c0e8fa18b6e03 [2024-10-13 12:10:02,103 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-13 12:10:02,132 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-13 12:10:02,135 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-13 12:10:02,137 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-13 12:10:02,137 INFO L274 PluginConnector]: CDTParser initialized [2024-10-13 12:10:02,139 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/09_fmaxsym-pthread.i [2024-10-13 12:10:03,695 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-13 12:10:03,979 INFO L384 CDTParser]: Found 1 translation units. [2024-10-13 12:10:03,980 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/09_fmaxsym-pthread.i [2024-10-13 12:10:03,998 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/864ee7625/8cd85828f3584223a6e014d70d86287a/FLAG7c355cf89 [2024-10-13 12:10:04,282 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/864ee7625/8cd85828f3584223a6e014d70d86287a [2024-10-13 12:10:04,285 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-13 12:10:04,286 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-13 12:10:04,288 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-13 12:10:04,288 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-13 12:10:04,295 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-13 12:10:04,296 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:10:04" (1/1) ... [2024-10-13 12:10:04,298 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6aefbbe3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:10:04, skipping insertion in model container [2024-10-13 12:10:04,298 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:10:04" (1/1) ... [2024-10-13 12:10:04,357 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-13 12:10:04,805 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 12:10:04,826 INFO L200 MainTranslator]: Completed pre-run [2024-10-13 12:10:04,883 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 12:10:04,973 INFO L204 MainTranslator]: Completed translation [2024-10-13 12:10:04,974 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:10:04 WrapperNode [2024-10-13 12:10:04,974 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-13 12:10:04,975 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-13 12:10:04,975 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-13 12:10:04,975 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-13 12:10:04,993 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:10:04" (1/1) ... [2024-10-13 12:10:05,040 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:10:04" (1/1) ... [2024-10-13 12:10:05,084 INFO L138 Inliner]: procedures = 164, calls = 29, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 93 [2024-10-13 12:10:05,086 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-13 12:10:05,088 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-13 12:10:05,088 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-13 12:10:05,089 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-13 12:10:05,100 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:10:04" (1/1) ... [2024-10-13 12:10:05,101 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:10:04" (1/1) ... [2024-10-13 12:10:05,105 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:10:04" (1/1) ... [2024-10-13 12:10:05,128 INFO L175 MemorySlicer]: Split 15 memory accesses to 3 slices as follows [2, 5, 8]. 53 percent of accesses are in the largest equivalence class. The 13 initializations are split as follows [2, 5, 6]. The 1 writes are split as follows [0, 0, 1]. [2024-10-13 12:10:05,129 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:10:04" (1/1) ... [2024-10-13 12:10:05,129 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:10:04" (1/1) ... [2024-10-13 12:10:05,135 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:10:04" (1/1) ... [2024-10-13 12:10:05,139 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:10:04" (1/1) ... [2024-10-13 12:10:05,141 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:10:04" (1/1) ... [2024-10-13 12:10:05,143 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:10:04" (1/1) ... [2024-10-13 12:10:05,146 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-13 12:10:05,147 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-13 12:10:05,147 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-13 12:10:05,147 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-13 12:10:05,148 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:10:04" (1/1) ... [2024-10-13 12:10:05,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 12:10:05,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:10:05,183 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) [2024-10-13 12:10:05,185 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 [2024-10-13 12:10:05,233 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-13 12:10:05,233 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-13 12:10:05,234 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-13 12:10:05,234 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-10-13 12:10:05,234 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-10-13 12:10:05,234 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-13 12:10:05,234 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-13 12:10:05,234 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-13 12:10:05,235 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-10-13 12:10:05,235 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-13 12:10:05,235 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-13 12:10:05,235 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-13 12:10:05,235 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-13 12:10:05,235 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-10-13 12:10:05,235 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-13 12:10:05,236 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-13 12:10:05,238 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-13 12:10:05,434 INFO L238 CfgBuilder]: Building ICFG [2024-10-13 12:10:05,437 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-13 12:10:05,716 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-13 12:10:05,716 INFO L287 CfgBuilder]: Performing block encoding [2024-10-13 12:10:05,873 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-13 12:10:05,873 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-13 12:10:05,873 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:10:05 BoogieIcfgContainer [2024-10-13 12:10:05,873 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-13 12:10:05,878 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-13 12:10:05,878 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-13 12:10:05,883 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-13 12:10:05,883 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 12:10:04" (1/3) ... [2024-10-13 12:10:05,884 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ebab02c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:10:05, skipping insertion in model container [2024-10-13 12:10:05,884 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:10:04" (2/3) ... [2024-10-13 12:10:05,884 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ebab02c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:10:05, skipping insertion in model container [2024-10-13 12:10:05,885 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:10:05" (3/3) ... [2024-10-13 12:10:05,886 INFO L112 eAbstractionObserver]: Analyzing ICFG 09_fmaxsym-pthread.i [2024-10-13 12:10:05,908 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-13 12:10:05,909 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2024-10-13 12:10:05,909 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-13 12:10:05,952 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-13 12:10:05,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 33 places, 34 transitions, 72 flow [2024-10-13 12:10:06,029 INFO L124 PetriNetUnfolderBase]: 4/38 cut-off events. [2024-10-13 12:10:06,031 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-13 12:10:06,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 38 events. 4/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 68 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 26. Up to 2 conditions per place. [2024-10-13 12:10:06,036 INFO L82 GeneralOperation]: Start removeDead. Operand has 33 places, 34 transitions, 72 flow [2024-10-13 12:10:06,040 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 33 places, 34 transitions, 72 flow [2024-10-13 12:10:06,051 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 12:10:06,059 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;@4f2bf520, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 12:10:06,060 INFO L334 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2024-10-13 12:10:06,063 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 12:10:06,064 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-10-13 12:10:06,064 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-13 12:10:06,065 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:10:06,065 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-13 12:10:06,066 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2024-10-13 12:10:06,071 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:10:06,072 INFO L85 PathProgramCache]: Analyzing trace with hash 293954, now seen corresponding path program 1 times [2024-10-13 12:10:06,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:10:06,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950059659] [2024-10-13 12:10:06,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:06,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:10:06,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:10:06,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:10:06,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:10:06,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950059659] [2024-10-13 12:10:06,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950059659] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:10:06,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:10:06,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-13 12:10:06,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094875439] [2024-10-13 12:10:06,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:10:06,420 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:10:06,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:10:06,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:10:06,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:10:06,467 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2024-10-13 12:10:06,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 34 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:10:06,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:10:06,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2024-10-13 12:10:06,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:10:06,532 INFO L124 PetriNetUnfolderBase]: 22/79 cut-off events. [2024-10-13 12:10:06,532 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-13 12:10:06,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140 conditions, 79 events. 22/79 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 175 event pairs, 18 based on Foata normal form. 6/84 useless extension candidates. Maximal degree in co-relation 121. Up to 56 conditions per place. [2024-10-13 12:10:06,535 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 16 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2024-10-13 12:10:06,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 26 transitions, 90 flow [2024-10-13 12:10:06,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:10:06,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:10:06,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 52 transitions. [2024-10-13 12:10:06,546 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5098039215686274 [2024-10-13 12:10:06,548 INFO L175 Difference]: Start difference. First operand has 33 places, 34 transitions, 72 flow. Second operand 3 states and 52 transitions. [2024-10-13 12:10:06,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 26 transitions, 90 flow [2024-10-13 12:10:06,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 26 transitions, 90 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-13 12:10:06,553 INFO L231 Difference]: Finished difference. Result has 29 places, 26 transitions, 58 flow [2024-10-13 12:10:06,555 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=58, PETRI_PLACES=29, PETRI_TRANSITIONS=26} [2024-10-13 12:10:06,560 INFO L277 CegarLoopForPetriNet]: 33 programPoint places, -4 predicate places. [2024-10-13 12:10:06,561 INFO L471 AbstractCegarLoop]: Abstraction has has 29 places, 26 transitions, 58 flow [2024-10-13 12:10:06,562 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:10:06,562 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:10:06,562 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-13 12:10:06,563 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-13 12:10:06,563 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2024-10-13 12:10:06,564 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:10:06,564 INFO L85 PathProgramCache]: Analyzing trace with hash 293955, now seen corresponding path program 1 times [2024-10-13 12:10:06,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:10:06,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974612416] [2024-10-13 12:10:06,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:06,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:10:06,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:10:06,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:10:06,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:10:06,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974612416] [2024-10-13 12:10:06,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974612416] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:10:06,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:10:06,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-13 12:10:06,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245973820] [2024-10-13 12:10:06,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:10:06,794 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:10:06,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:10:06,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:10:06,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:10:06,806 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 34 [2024-10-13 12:10:06,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 26 transitions, 58 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:10:06,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:10:06,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 34 [2024-10-13 12:10:06,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:10:06,890 INFO L124 PetriNetUnfolderBase]: 22/81 cut-off events. [2024-10-13 12:10:06,890 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-13 12:10:06,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147 conditions, 81 events. 22/81 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 175 event pairs, 18 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 140. Up to 58 conditions per place. [2024-10-13 12:10:06,892 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 18 selfloop transitions, 2 changer transitions 0/28 dead transitions. [2024-10-13 12:10:06,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 28 transitions, 102 flow [2024-10-13 12:10:06,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:10:06,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:10:06,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 55 transitions. [2024-10-13 12:10:06,902 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5392156862745098 [2024-10-13 12:10:06,902 INFO L175 Difference]: Start difference. First operand has 29 places, 26 transitions, 58 flow. Second operand 3 states and 55 transitions. [2024-10-13 12:10:06,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 28 transitions, 102 flow [2024-10-13 12:10:06,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 28 transitions, 101 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-13 12:10:06,904 INFO L231 Difference]: Finished difference. Result has 31 places, 27 transitions, 71 flow [2024-10-13 12:10:06,905 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=57, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=71, PETRI_PLACES=31, PETRI_TRANSITIONS=27} [2024-10-13 12:10:06,906 INFO L277 CegarLoopForPetriNet]: 33 programPoint places, -2 predicate places. [2024-10-13 12:10:06,906 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 27 transitions, 71 flow [2024-10-13 12:10:06,906 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:10:06,907 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:10:06,907 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-10-13 12:10:06,907 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-13 12:10:06,907 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2024-10-13 12:10:06,909 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:10:06,909 INFO L85 PathProgramCache]: Analyzing trace with hash 282500254, now seen corresponding path program 1 times [2024-10-13 12:10:06,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:10:06,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433109045] [2024-10-13 12:10:06,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:06,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:10:06,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:10:07,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:10:07,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:10:07,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433109045] [2024-10-13 12:10:07,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433109045] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 12:10:07,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751994631] [2024-10-13 12:10:07,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:07,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:10:07,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:10:07,096 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 12:10:07,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-13 12:10:07,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:10:07,189 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-13 12:10:07,196 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:10:07,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:10:07,317 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:10:07,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:10:07,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751994631] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:10:07,404 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 12:10:07,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2024-10-13 12:10:07,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272410911] [2024-10-13 12:10:07,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 12:10:07,405 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-13 12:10:07,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:10:07,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-13 12:10:07,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-10-13 12:10:07,458 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 34 [2024-10-13 12:10:07,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 27 transitions, 71 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:10:07,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:10:07,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 34 [2024-10-13 12:10:07,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:10:07,656 INFO L124 PetriNetUnfolderBase]: 24/89 cut-off events. [2024-10-13 12:10:07,656 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-13 12:10:07,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175 conditions, 89 events. 24/89 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 197 event pairs, 18 based on Foata normal form. 1/89 useless extension candidates. Maximal degree in co-relation 166. Up to 60 conditions per place. [2024-10-13 12:10:07,659 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 21 selfloop transitions, 7 changer transitions 0/36 dead transitions. [2024-10-13 12:10:07,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 36 transitions, 155 flow [2024-10-13 12:10:07,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 12:10:07,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-13 12:10:07,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2024-10-13 12:10:07,661 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4803921568627451 [2024-10-13 12:10:07,661 INFO L175 Difference]: Start difference. First operand has 31 places, 27 transitions, 71 flow. Second operand 6 states and 98 transitions. [2024-10-13 12:10:07,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 36 transitions, 155 flow [2024-10-13 12:10:07,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 36 transitions, 153 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-13 12:10:07,663 INFO L231 Difference]: Finished difference. Result has 38 places, 32 transitions, 121 flow [2024-10-13 12:10:07,663 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=121, PETRI_PLACES=38, PETRI_TRANSITIONS=32} [2024-10-13 12:10:07,664 INFO L277 CegarLoopForPetriNet]: 33 programPoint places, 5 predicate places. [2024-10-13 12:10:07,664 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 32 transitions, 121 flow [2024-10-13 12:10:07,665 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:10:07,665 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:10:07,665 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-10-13 12:10:07,683 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-13 12:10:07,865 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:10:07,866 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2024-10-13 12:10:07,867 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:10:07,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1778926289, now seen corresponding path program 2 times [2024-10-13 12:10:07,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:10:07,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703960087] [2024-10-13 12:10:07,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:07,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:10:07,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:10:08,238 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:10:08,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:10:08,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703960087] [2024-10-13 12:10:08,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703960087] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 12:10:08,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640365032] [2024-10-13 12:10:08,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 12:10:08,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:10:08,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:10:08,241 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 12:10:08,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-13 12:10:08,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 12:10:08,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 12:10:08,321 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-13 12:10:08,322 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:10:08,593 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:10:08,594 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 12:10:08,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640365032] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:10:08,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-13 12:10:08,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 12 [2024-10-13 12:10:08,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798834692] [2024-10-13 12:10:08,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:10:08,598 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-13 12:10:08,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:10:08,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-13 12:10:08,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2024-10-13 12:10:08,632 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 34 [2024-10-13 12:10:08,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 32 transitions, 121 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:10:08,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:10:08,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 34 [2024-10-13 12:10:08,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:10:08,750 INFO L124 PetriNetUnfolderBase]: 24/88 cut-off events. [2024-10-13 12:10:08,750 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-10-13 12:10:08,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188 conditions, 88 events. 24/88 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 196 event pairs, 18 based on Foata normal form. 1/89 useless extension candidates. Maximal degree in co-relation 175. Up to 56 conditions per place. [2024-10-13 12:10:08,752 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 17 selfloop transitions, 10 changer transitions 0/35 dead transitions. [2024-10-13 12:10:08,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 35 transitions, 173 flow [2024-10-13 12:10:08,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-13 12:10:08,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-13 12:10:08,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 116 transitions. [2024-10-13 12:10:08,755 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4264705882352941 [2024-10-13 12:10:08,755 INFO L175 Difference]: Start difference. First operand has 38 places, 32 transitions, 121 flow. Second operand 8 states and 116 transitions. [2024-10-13 12:10:08,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 35 transitions, 173 flow [2024-10-13 12:10:08,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 35 transitions, 147 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-10-13 12:10:08,760 INFO L231 Difference]: Finished difference. Result has 40 places, 32 transitions, 113 flow [2024-10-13 12:10:08,760 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=113, PETRI_PLACES=40, PETRI_TRANSITIONS=32} [2024-10-13 12:10:08,761 INFO L277 CegarLoopForPetriNet]: 33 programPoint places, 7 predicate places. [2024-10-13 12:10:08,761 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 32 transitions, 113 flow [2024-10-13 12:10:08,761 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:10:08,761 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:10:08,761 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1] [2024-10-13 12:10:08,783 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-13 12:10:08,962 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-10-13 12:10:08,963 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2024-10-13 12:10:08,963 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:10:08,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1753973236, now seen corresponding path program 1 times [2024-10-13 12:10:08,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:10:08,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372476684] [2024-10-13 12:10:08,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:08,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:10:08,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:10:09,043 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 12:10:09,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:10:09,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372476684] [2024-10-13 12:10:09,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372476684] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 12:10:09,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770992309] [2024-10-13 12:10:09,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:09,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:10:09,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:10:09,050 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 12:10:09,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-13 12:10:09,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:10:09,129 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-13 12:10:09,130 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:10:09,150 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 12:10:09,151 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:10:09,183 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 12:10:09,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770992309] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:10:09,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 12:10:09,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-10-13 12:10:09,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371342461] [2024-10-13 12:10:09,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 12:10:09,185 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-13 12:10:09,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:10:09,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-13 12:10:09,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-10-13 12:10:09,203 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 34 [2024-10-13 12:10:09,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 32 transitions, 113 flow. Second operand has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 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) [2024-10-13 12:10:09,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:10:09,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 34 [2024-10-13 12:10:09,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:10:09,317 INFO L124 PetriNetUnfolderBase]: 22/89 cut-off events. [2024-10-13 12:10:09,318 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-10-13 12:10:09,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192 conditions, 89 events. 22/89 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 172 event pairs, 18 based on Foata normal form. 4/93 useless extension candidates. Maximal degree in co-relation 181. Up to 55 conditions per place. [2024-10-13 12:10:09,319 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 20 selfloop transitions, 8 changer transitions 0/36 dead transitions. [2024-10-13 12:10:09,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 36 transitions, 186 flow [2024-10-13 12:10:09,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-13 12:10:09,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-13 12:10:09,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-10-13 12:10:09,324 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47058823529411764 [2024-10-13 12:10:09,324 INFO L175 Difference]: Start difference. First operand has 40 places, 32 transitions, 113 flow. Second operand 8 states and 128 transitions. [2024-10-13 12:10:09,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 36 transitions, 186 flow [2024-10-13 12:10:09,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 36 transitions, 168 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-10-13 12:10:09,329 INFO L231 Difference]: Finished difference. Result has 44 places, 32 transitions, 125 flow [2024-10-13 12:10:09,330 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=125, PETRI_PLACES=44, PETRI_TRANSITIONS=32} [2024-10-13 12:10:09,331 INFO L277 CegarLoopForPetriNet]: 33 programPoint places, 11 predicate places. [2024-10-13 12:10:09,331 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 32 transitions, 125 flow [2024-10-13 12:10:09,331 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 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) [2024-10-13 12:10:09,331 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:10:09,331 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 2, 1, 1, 1, 1, 1] [2024-10-13 12:10:09,354 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-13 12:10:09,532 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:10:09,533 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2024-10-13 12:10:09,533 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:10:09,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1430131448, now seen corresponding path program 2 times [2024-10-13 12:10:09,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:10:09,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611792192] [2024-10-13 12:10:09,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:09,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:10:09,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 12:10:09,579 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-13 12:10:09,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 12:10:09,641 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-13 12:10:09,642 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-13 12:10:09,643 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 10 remaining) [2024-10-13 12:10:09,646 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 10 remaining) [2024-10-13 12:10:09,646 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 10 remaining) [2024-10-13 12:10:09,647 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (6 of 10 remaining) [2024-10-13 12:10:09,647 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 10 remaining) [2024-10-13 12:10:09,648 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 10 remaining) [2024-10-13 12:10:09,648 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (3 of 10 remaining) [2024-10-13 12:10:09,648 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 10 remaining) [2024-10-13 12:10:09,648 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 10 remaining) [2024-10-13 12:10:09,649 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (0 of 10 remaining) [2024-10-13 12:10:09,649 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-13 12:10:09,649 INFO L407 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1] [2024-10-13 12:10:09,652 WARN L239 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-13 12:10:09,652 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-10-13 12:10:09,685 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-13 12:10:09,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 56 transitions, 122 flow [2024-10-13 12:10:09,697 INFO L124 PetriNetUnfolderBase]: 7/65 cut-off events. [2024-10-13 12:10:09,697 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-13 12:10:09,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73 conditions, 65 events. 7/65 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 144 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 47. Up to 3 conditions per place. [2024-10-13 12:10:09,698 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 56 transitions, 122 flow [2024-10-13 12:10:09,699 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 54 places, 56 transitions, 122 flow [2024-10-13 12:10:09,701 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 12:10:09,702 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;@4f2bf520, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 12:10:09,702 INFO L334 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2024-10-13 12:10:09,704 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 12:10:09,704 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-10-13 12:10:09,705 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-13 12:10:09,705 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:10:09,705 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-13 12:10:09,705 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2024-10-13 12:10:09,706 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:10:09,706 INFO L85 PathProgramCache]: Analyzing trace with hash 349562, now seen corresponding path program 1 times [2024-10-13 12:10:09,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:10:09,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403328560] [2024-10-13 12:10:09,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:09,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:10:09,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:10:09,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:10:09,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:10:09,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403328560] [2024-10-13 12:10:09,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403328560] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:10:09,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:10:09,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-13 12:10:09,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706729481] [2024-10-13 12:10:09,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:10:09,754 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:10:09,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:10:09,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:10:09,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:10:09,768 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 56 [2024-10-13 12:10:09,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 56 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:10:09,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:10:09,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 56 [2024-10-13 12:10:09,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:10:09,934 INFO L124 PetriNetUnfolderBase]: 532/1126 cut-off events. [2024-10-13 12:10:09,934 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2024-10-13 12:10:09,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2028 conditions, 1126 events. 532/1126 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 6122 event pairs, 468 based on Foata normal form. 123/1233 useless extension candidates. Maximal degree in co-relation 1291. Up to 866 conditions per place. [2024-10-13 12:10:09,946 INFO L140 encePairwiseOnDemand]: 47/56 looper letters, 27 selfloop transitions, 1 changer transitions 0/44 dead transitions. [2024-10-13 12:10:09,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 44 transitions, 154 flow [2024-10-13 12:10:09,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:10:09,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:10:09,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 87 transitions. [2024-10-13 12:10:09,948 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5178571428571429 [2024-10-13 12:10:09,948 INFO L175 Difference]: Start difference. First operand has 54 places, 56 transitions, 122 flow. Second operand 3 states and 87 transitions. [2024-10-13 12:10:09,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 44 transitions, 154 flow [2024-10-13 12:10:09,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 44 transitions, 154 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-13 12:10:09,950 INFO L231 Difference]: Finished difference. Result has 48 places, 44 transitions, 100 flow [2024-10-13 12:10:09,950 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=48, PETRI_TRANSITIONS=44} [2024-10-13 12:10:09,951 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, -6 predicate places. [2024-10-13 12:10:09,951 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 44 transitions, 100 flow [2024-10-13 12:10:09,951 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:10:09,951 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:10:09,952 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-13 12:10:09,952 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-13 12:10:09,952 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2024-10-13 12:10:09,953 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:10:09,953 INFO L85 PathProgramCache]: Analyzing trace with hash 349563, now seen corresponding path program 1 times [2024-10-13 12:10:09,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:10:09,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580879921] [2024-10-13 12:10:09,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:09,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:10:09,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:10:10,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:10:10,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:10:10,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580879921] [2024-10-13 12:10:10,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580879921] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:10:10,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:10:10,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-13 12:10:10,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624552177] [2024-10-13 12:10:10,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:10:10,015 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:10:10,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:10:10,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:10:10,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:10:10,033 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 56 [2024-10-13 12:10:10,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 44 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:10:10,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:10:10,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 56 [2024-10-13 12:10:10,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:10:10,232 INFO L124 PetriNetUnfolderBase]: 532/1128 cut-off events. [2024-10-13 12:10:10,232 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2024-10-13 12:10:10,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2035 conditions, 1128 events. 532/1128 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 6120 event pairs, 468 based on Foata normal form. 0/1111 useless extension candidates. Maximal degree in co-relation 2027. Up to 868 conditions per place. [2024-10-13 12:10:10,242 INFO L140 encePairwiseOnDemand]: 52/56 looper letters, 29 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2024-10-13 12:10:10,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 46 transitions, 166 flow [2024-10-13 12:10:10,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:10:10,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:10:10,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 90 transitions. [2024-10-13 12:10:10,244 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-10-13 12:10:10,244 INFO L175 Difference]: Start difference. First operand has 48 places, 44 transitions, 100 flow. Second operand 3 states and 90 transitions. [2024-10-13 12:10:10,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 46 transitions, 166 flow [2024-10-13 12:10:10,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 46 transitions, 165 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-13 12:10:10,247 INFO L231 Difference]: Finished difference. Result has 50 places, 45 transitions, 113 flow [2024-10-13 12:10:10,247 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=113, PETRI_PLACES=50, PETRI_TRANSITIONS=45} [2024-10-13 12:10:10,248 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, -4 predicate places. [2024-10-13 12:10:10,249 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 45 transitions, 113 flow [2024-10-13 12:10:10,249 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:10:10,250 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:10:10,250 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-10-13 12:10:10,250 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-13 12:10:10,250 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2024-10-13 12:10:10,250 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:10:10,251 INFO L85 PathProgramCache]: Analyzing trace with hash 335941334, now seen corresponding path program 1 times [2024-10-13 12:10:10,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:10:10,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490691968] [2024-10-13 12:10:10,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:10,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:10:10,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:10:10,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:10:10,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:10:10,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490691968] [2024-10-13 12:10:10,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490691968] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 12:10:10,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403866104] [2024-10-13 12:10:10,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:10,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:10:10,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:10:10,342 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 12:10:10,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-13 12:10:10,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:10:10,413 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-13 12:10:10,414 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:10:10,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:10:10,473 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:10:10,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:10:10,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403866104] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:10:10,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 12:10:10,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2024-10-13 12:10:10,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158536635] [2024-10-13 12:10:10,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 12:10:10,516 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-13 12:10:10,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:10:10,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-13 12:10:10,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-10-13 12:10:10,592 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 56 [2024-10-13 12:10:10,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 45 transitions, 113 flow. Second operand has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:10:10,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:10:10,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 56 [2024-10-13 12:10:10,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:10:10,849 INFO L124 PetriNetUnfolderBase]: 534/1136 cut-off events. [2024-10-13 12:10:10,849 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2024-10-13 12:10:10,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2063 conditions, 1136 events. 534/1136 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 6179 event pairs, 468 based on Foata normal form. 1/1121 useless extension candidates. Maximal degree in co-relation 2053. Up to 870 conditions per place. [2024-10-13 12:10:10,858 INFO L140 encePairwiseOnDemand]: 52/56 looper letters, 32 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2024-10-13 12:10:10,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 54 transitions, 219 flow [2024-10-13 12:10:10,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 12:10:10,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-13 12:10:10,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-10-13 12:10:10,860 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46726190476190477 [2024-10-13 12:10:10,860 INFO L175 Difference]: Start difference. First operand has 50 places, 45 transitions, 113 flow. Second operand 6 states and 157 transitions. [2024-10-13 12:10:10,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 54 transitions, 219 flow [2024-10-13 12:10:10,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 54 transitions, 217 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-13 12:10:10,862 INFO L231 Difference]: Finished difference. Result has 57 places, 50 transitions, 163 flow [2024-10-13 12:10:10,862 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=163, PETRI_PLACES=57, PETRI_TRANSITIONS=50} [2024-10-13 12:10:10,863 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 3 predicate places. [2024-10-13 12:10:10,863 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 50 transitions, 163 flow [2024-10-13 12:10:10,864 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:10:10,864 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:10:10,864 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-10-13 12:10:10,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-13 12:10:11,068 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:10:11,069 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2024-10-13 12:10:11,070 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:10:11,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1251640729, now seen corresponding path program 2 times [2024-10-13 12:10:11,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:10:11,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438688319] [2024-10-13 12:10:11,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:11,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:10:11,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:10:11,302 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:10:11,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:10:11,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438688319] [2024-10-13 12:10:11,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438688319] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 12:10:11,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032685028] [2024-10-13 12:10:11,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 12:10:11,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:10:11,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:10:11,306 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 12:10:11,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-13 12:10:11,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 12:10:11,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 12:10:11,380 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-13 12:10:11,381 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:10:11,580 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:10:11,580 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 12:10:11,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032685028] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:10:11,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-13 12:10:11,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 12 [2024-10-13 12:10:11,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466258750] [2024-10-13 12:10:11,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:10:11,582 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-13 12:10:11,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:10:11,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-13 12:10:11,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2024-10-13 12:10:11,628 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 56 [2024-10-13 12:10:11,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 50 transitions, 163 flow. Second operand has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:10:11,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:10:11,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 56 [2024-10-13 12:10:11,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:10:11,852 INFO L124 PetriNetUnfolderBase]: 534/1135 cut-off events. [2024-10-13 12:10:11,852 INFO L125 PetriNetUnfolderBase]: For 49/49 co-relation queries the response was YES. [2024-10-13 12:10:11,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2076 conditions, 1135 events. 534/1135 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 6131 event pairs, 468 based on Foata normal form. 1/1121 useless extension candidates. Maximal degree in co-relation 2062. Up to 866 conditions per place. [2024-10-13 12:10:11,863 INFO L140 encePairwiseOnDemand]: 51/56 looper letters, 28 selfloop transitions, 10 changer transitions 0/53 dead transitions. [2024-10-13 12:10:11,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 53 transitions, 237 flow [2024-10-13 12:10:11,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-13 12:10:11,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-13 12:10:11,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-10-13 12:10:11,865 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4263392857142857 [2024-10-13 12:10:11,865 INFO L175 Difference]: Start difference. First operand has 57 places, 50 transitions, 163 flow. Second operand 8 states and 191 transitions. [2024-10-13 12:10:11,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 53 transitions, 237 flow [2024-10-13 12:10:11,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 53 transitions, 211 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-10-13 12:10:11,870 INFO L231 Difference]: Finished difference. Result has 59 places, 50 transitions, 155 flow [2024-10-13 12:10:11,871 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=155, PETRI_PLACES=59, PETRI_TRANSITIONS=50} [2024-10-13 12:10:11,872 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 5 predicate places. [2024-10-13 12:10:11,873 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 50 transitions, 155 flow [2024-10-13 12:10:11,873 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:10:11,873 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:10:11,873 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:10:11,895 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-13 12:10:12,073 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-13 12:10:12,074 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2024-10-13 12:10:12,075 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:10:12,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1226014631, now seen corresponding path program 1 times [2024-10-13 12:10:12,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:10:12,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106044001] [2024-10-13 12:10:12,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:12,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:10:12,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:10:12,143 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:10:12,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:10:12,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106044001] [2024-10-13 12:10:12,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106044001] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 12:10:12,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603337228] [2024-10-13 12:10:12,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:12,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:10:12,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:10:12,146 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 12:10:12,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-13 12:10:12,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:10:12,220 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-13 12:10:12,221 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:10:12,234 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:10:12,234 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:10:12,260 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:10:12,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603337228] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:10:12,261 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 12:10:12,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-10-13 12:10:12,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817190062] [2024-10-13 12:10:12,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 12:10:12,261 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-13 12:10:12,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:10:12,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-13 12:10:12,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-10-13 12:10:12,271 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 56 [2024-10-13 12:10:12,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 50 transitions, 155 flow. Second operand has 9 states, 9 states have (on average 22.0) internal successors, (198), 9 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:10:12,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:10:12,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 56 [2024-10-13 12:10:12,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:10:12,445 INFO L124 PetriNetUnfolderBase]: 532/1136 cut-off events. [2024-10-13 12:10:12,446 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2024-10-13 12:10:12,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2080 conditions, 1136 events. 532/1136 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 6117 event pairs, 468 based on Foata normal form. 4/1125 useless extension candidates. Maximal degree in co-relation 2068. Up to 865 conditions per place. [2024-10-13 12:10:12,455 INFO L140 encePairwiseOnDemand]: 52/56 looper letters, 31 selfloop transitions, 8 changer transitions 0/54 dead transitions. [2024-10-13 12:10:12,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 54 transitions, 250 flow [2024-10-13 12:10:12,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-13 12:10:12,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-13 12:10:12,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-10-13 12:10:12,458 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.453125 [2024-10-13 12:10:12,458 INFO L175 Difference]: Start difference. First operand has 59 places, 50 transitions, 155 flow. Second operand 8 states and 203 transitions. [2024-10-13 12:10:12,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 54 transitions, 250 flow [2024-10-13 12:10:12,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 54 transitions, 232 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-10-13 12:10:12,460 INFO L231 Difference]: Finished difference. Result has 63 places, 50 transitions, 167 flow [2024-10-13 12:10:12,460 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=167, PETRI_PLACES=63, PETRI_TRANSITIONS=50} [2024-10-13 12:10:12,461 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 9 predicate places. [2024-10-13 12:10:12,461 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 50 transitions, 167 flow [2024-10-13 12:10:12,461 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 22.0) internal successors, (198), 9 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:10:12,462 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:10:12,462 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:10:12,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-13 12:10:12,662 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:10:12,663 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2024-10-13 12:10:12,663 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:10:12,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1526659397, now seen corresponding path program 2 times [2024-10-13 12:10:12,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:10:12,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908720122] [2024-10-13 12:10:12,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:12,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:10:12,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:10:12,960 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-10-13 12:10:12,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:10:12,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908720122] [2024-10-13 12:10:12,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908720122] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:10:12,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:10:12,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 12:10:12,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479381931] [2024-10-13 12:10:12,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:10:12,962 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 12:10:12,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:10:12,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 12:10:12,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-13 12:10:12,991 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 56 [2024-10-13 12:10:12,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 50 transitions, 167 flow. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:10:12,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:10:12,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 56 [2024-10-13 12:10:12,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:10:13,344 INFO L124 PetriNetUnfolderBase]: 1009/2083 cut-off events. [2024-10-13 12:10:13,345 INFO L125 PetriNetUnfolderBase]: For 65/65 co-relation queries the response was YES. [2024-10-13 12:10:13,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3836 conditions, 2083 events. 1009/2083 cut-off events. For 65/65 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 12212 event pairs, 168 based on Foata normal form. 33/2080 useless extension candidates. Maximal degree in co-relation 3822. Up to 688 conditions per place. [2024-10-13 12:10:13,362 INFO L140 encePairwiseOnDemand]: 50/56 looper letters, 65 selfloop transitions, 5 changer transitions 0/84 dead transitions. [2024-10-13 12:10:13,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 84 transitions, 385 flow [2024-10-13 12:10:13,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 12:10:13,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-13 12:10:13,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 160 transitions. [2024-10-13 12:10:13,364 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-10-13 12:10:13,364 INFO L175 Difference]: Start difference. First operand has 63 places, 50 transitions, 167 flow. Second operand 5 states and 160 transitions. [2024-10-13 12:10:13,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 84 transitions, 385 flow [2024-10-13 12:10:13,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 84 transitions, 377 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-13 12:10:13,367 INFO L231 Difference]: Finished difference. Result has 65 places, 52 transitions, 186 flow [2024-10-13 12:10:13,367 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=186, PETRI_PLACES=65, PETRI_TRANSITIONS=52} [2024-10-13 12:10:13,368 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 11 predicate places. [2024-10-13 12:10:13,368 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 52 transitions, 186 flow [2024-10-13 12:10:13,368 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:10:13,369 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:10:13,369 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 3, 2, 1, 1, 1, 1, 1] [2024-10-13 12:10:13,369 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-13 12:10:13,369 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2024-10-13 12:10:13,369 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:10:13,370 INFO L85 PathProgramCache]: Analyzing trace with hash -110718274, now seen corresponding path program 1 times [2024-10-13 12:10:13,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:10:13,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136305469] [2024-10-13 12:10:13,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:13,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:10:13,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 12:10:13,390 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-13 12:10:13,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 12:10:13,417 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-13 12:10:13,417 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-13 12:10:13,417 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 13 remaining) [2024-10-13 12:10:13,417 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 13 remaining) [2024-10-13 12:10:13,418 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 13 remaining) [2024-10-13 12:10:13,418 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (9 of 13 remaining) [2024-10-13 12:10:13,418 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 13 remaining) [2024-10-13 12:10:13,419 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 13 remaining) [2024-10-13 12:10:13,419 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (6 of 13 remaining) [2024-10-13 12:10:13,419 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 13 remaining) [2024-10-13 12:10:13,442 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 13 remaining) [2024-10-13 12:10:13,442 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (3 of 13 remaining) [2024-10-13 12:10:13,442 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 13 remaining) [2024-10-13 12:10:13,442 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 13 remaining) [2024-10-13 12:10:13,443 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (0 of 13 remaining) [2024-10-13 12:10:13,443 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-10-13 12:10:13,443 INFO L407 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1] [2024-10-13 12:10:13,443 WARN L239 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-13 12:10:13,444 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-10-13 12:10:13,471 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-13 12:10:13,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 78 transitions, 174 flow [2024-10-13 12:10:13,480 INFO L124 PetriNetUnfolderBase]: 10/92 cut-off events. [2024-10-13 12:10:13,481 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-10-13 12:10:13,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105 conditions, 92 events. 10/92 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 260 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 69. Up to 4 conditions per place. [2024-10-13 12:10:13,481 INFO L82 GeneralOperation]: Start removeDead. Operand has 75 places, 78 transitions, 174 flow [2024-10-13 12:10:13,482 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 75 places, 78 transitions, 174 flow [2024-10-13 12:10:13,483 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 12:10:13,484 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;@4f2bf520, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 12:10:13,484 INFO L334 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2024-10-13 12:10:13,485 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 12:10:13,485 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-10-13 12:10:13,486 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-13 12:10:13,486 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:10:13,486 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-13 12:10:13,486 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2024-10-13 12:10:13,486 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:10:13,486 INFO L85 PathProgramCache]: Analyzing trace with hash 427016, now seen corresponding path program 1 times [2024-10-13 12:10:13,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:10:13,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839816699] [2024-10-13 12:10:13,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:13,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:10:13,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:10:13,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:10:13,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:10:13,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839816699] [2024-10-13 12:10:13,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839816699] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:10:13,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:10:13,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-13 12:10:13,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653805727] [2024-10-13 12:10:13,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:10:13,515 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:10:13,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:10:13,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:10:13,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:10:13,530 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 78 [2024-10-13 12:10:13,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 78 transitions, 174 flow. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:10:13,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:10:13,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 78 [2024-10-13 12:10:13,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:10:14,985 INFO L124 PetriNetUnfolderBase]: 8632/14642 cut-off events. [2024-10-13 12:10:14,985 INFO L125 PetriNetUnfolderBase]: For 684/684 co-relation queries the response was YES. [2024-10-13 12:10:15,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27045 conditions, 14642 events. 8632/14642 cut-off events. For 684/684 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 107057 event pairs, 7668 based on Foata normal form. 1878/16290 useless extension candidates. Maximal degree in co-relation 8570. Up to 11966 conditions per place. [2024-10-13 12:10:15,120 INFO L140 encePairwiseOnDemand]: 66/78 looper letters, 38 selfloop transitions, 1 changer transitions 0/62 dead transitions. [2024-10-13 12:10:15,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 62 transitions, 220 flow [2024-10-13 12:10:15,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:10:15,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:10:15,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 122 transitions. [2024-10-13 12:10:15,122 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5213675213675214 [2024-10-13 12:10:15,122 INFO L175 Difference]: Start difference. First operand has 75 places, 78 transitions, 174 flow. Second operand 3 states and 122 transitions. [2024-10-13 12:10:15,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 62 transitions, 220 flow [2024-10-13 12:10:15,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 62 transitions, 218 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-10-13 12:10:15,125 INFO L231 Difference]: Finished difference. Result has 67 places, 62 transitions, 142 flow [2024-10-13 12:10:15,125 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=67, PETRI_TRANSITIONS=62} [2024-10-13 12:10:15,127 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, -8 predicate places. [2024-10-13 12:10:15,127 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 62 transitions, 142 flow [2024-10-13 12:10:15,127 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:10:15,127 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:10:15,127 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-13 12:10:15,127 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-10-13 12:10:15,127 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2024-10-13 12:10:15,128 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:10:15,128 INFO L85 PathProgramCache]: Analyzing trace with hash 427017, now seen corresponding path program 1 times [2024-10-13 12:10:15,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:10:15,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544680455] [2024-10-13 12:10:15,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:15,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:10:15,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:10:15,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:10:15,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:10:15,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544680455] [2024-10-13 12:10:15,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544680455] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:10:15,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:10:15,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-13 12:10:15,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900200354] [2024-10-13 12:10:15,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:10:15,184 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:10:15,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:10:15,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:10:15,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:10:15,199 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 78 [2024-10-13 12:10:15,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 62 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:10:15,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:10:15,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 78 [2024-10-13 12:10:15,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:10:16,614 INFO L124 PetriNetUnfolderBase]: 8632/14644 cut-off events. [2024-10-13 12:10:16,614 INFO L125 PetriNetUnfolderBase]: For 388/388 co-relation queries the response was YES. [2024-10-13 12:10:16,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26952 conditions, 14644 events. 8632/14644 cut-off events. For 388/388 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 107025 event pairs, 7668 based on Foata normal form. 0/14413 useless extension candidates. Maximal degree in co-relation 26943. Up to 11968 conditions per place. [2024-10-13 12:10:16,755 INFO L140 encePairwiseOnDemand]: 74/78 looper letters, 40 selfloop transitions, 2 changer transitions 0/64 dead transitions. [2024-10-13 12:10:16,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 64 transitions, 230 flow [2024-10-13 12:10:16,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:10:16,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:10:16,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 125 transitions. [2024-10-13 12:10:16,757 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5341880341880342 [2024-10-13 12:10:16,757 INFO L175 Difference]: Start difference. First operand has 67 places, 62 transitions, 142 flow. Second operand 3 states and 125 transitions. [2024-10-13 12:10:16,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 64 transitions, 230 flow [2024-10-13 12:10:16,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 64 transitions, 229 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-13 12:10:16,761 INFO L231 Difference]: Finished difference. Result has 69 places, 63 transitions, 155 flow [2024-10-13 12:10:16,762 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=155, PETRI_PLACES=69, PETRI_TRANSITIONS=63} [2024-10-13 12:10:16,763 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, -6 predicate places. [2024-10-13 12:10:16,763 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 63 transitions, 155 flow [2024-10-13 12:10:16,763 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:10:16,763 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:10:16,763 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-10-13 12:10:16,764 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-10-13 12:10:16,764 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2024-10-13 12:10:16,765 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:10:16,765 INFO L85 PathProgramCache]: Analyzing trace with hash 410377124, now seen corresponding path program 1 times [2024-10-13 12:10:16,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:10:16,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152163488] [2024-10-13 12:10:16,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:16,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:10:16,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:10:16,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:10:16,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:10:16,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152163488] [2024-10-13 12:10:16,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152163488] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 12:10:16,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255945860] [2024-10-13 12:10:16,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:16,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:10:16,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:10:16,854 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 12:10:16,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-13 12:10:16,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:10:16,929 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-13 12:10:16,930 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:10:16,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:10:16,985 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:10:17,032 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:10:17,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255945860] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:10:17,032 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 12:10:17,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2024-10-13 12:10:17,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767739597] [2024-10-13 12:10:17,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 12:10:17,033 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-13 12:10:17,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:10:17,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-13 12:10:17,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-10-13 12:10:17,099 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 78 [2024-10-13 12:10:17,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 63 transitions, 155 flow. Second operand has 8 states, 8 states have (on average 28.875) internal successors, (231), 8 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:10:17,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:10:17,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 78 [2024-10-13 12:10:17,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:10:18,870 INFO L124 PetriNetUnfolderBase]: 8634/14652 cut-off events. [2024-10-13 12:10:18,871 INFO L125 PetriNetUnfolderBase]: For 388/388 co-relation queries the response was YES. [2024-10-13 12:10:18,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26980 conditions, 14652 events. 8634/14652 cut-off events. For 388/388 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 107045 event pairs, 7668 based on Foata normal form. 1/14423 useless extension candidates. Maximal degree in co-relation 26969. Up to 11970 conditions per place. [2024-10-13 12:10:18,973 INFO L140 encePairwiseOnDemand]: 74/78 looper letters, 43 selfloop transitions, 7 changer transitions 0/72 dead transitions. [2024-10-13 12:10:18,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 72 transitions, 283 flow [2024-10-13 12:10:18,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 12:10:18,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-13 12:10:18,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 216 transitions. [2024-10-13 12:10:18,975 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-10-13 12:10:18,976 INFO L175 Difference]: Start difference. First operand has 69 places, 63 transitions, 155 flow. Second operand 6 states and 216 transitions. [2024-10-13 12:10:18,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 72 transitions, 283 flow [2024-10-13 12:10:18,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 72 transitions, 281 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-13 12:10:18,978 INFO L231 Difference]: Finished difference. Result has 76 places, 68 transitions, 205 flow [2024-10-13 12:10:18,978 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=205, PETRI_PLACES=76, PETRI_TRANSITIONS=68} [2024-10-13 12:10:18,979 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 1 predicate places. [2024-10-13 12:10:18,979 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 68 transitions, 205 flow [2024-10-13 12:10:18,979 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 28.875) internal successors, (231), 8 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:10:18,980 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:10:18,980 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-10-13 12:10:19,000 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-13 12:10:19,184 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:10:19,185 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2024-10-13 12:10:19,185 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:10:19,185 INFO L85 PathProgramCache]: Analyzing trace with hash -57032203, now seen corresponding path program 2 times [2024-10-13 12:10:19,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:10:19,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421405940] [2024-10-13 12:10:19,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:19,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:10:19,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:10:19,499 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:10:19,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:10:19,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421405940] [2024-10-13 12:10:19,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421405940] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 12:10:19,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355354887] [2024-10-13 12:10:19,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 12:10:19,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:10:19,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:10:19,503 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 12:10:19,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-13 12:10:19,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 12:10:19,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 12:10:19,594 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-13 12:10:19,595 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:10:19,783 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:10:19,784 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 12:10:19,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355354887] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:10:19,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-13 12:10:19,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 12 [2024-10-13 12:10:19,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624477182] [2024-10-13 12:10:19,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:10:19,786 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-13 12:10:19,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:10:19,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-13 12:10:19,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2024-10-13 12:10:19,846 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 78 [2024-10-13 12:10:19,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 68 transitions, 205 flow. Second operand has 8 states, 8 states have (on average 28.375) internal successors, (227), 8 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:10:19,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:10:19,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 78 [2024-10-13 12:10:19,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:10:20,977 INFO L124 PetriNetUnfolderBase]: 8634/14651 cut-off events. [2024-10-13 12:10:20,977 INFO L125 PetriNetUnfolderBase]: For 405/405 co-relation queries the response was YES. [2024-10-13 12:10:21,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26993 conditions, 14651 events. 8634/14651 cut-off events. For 405/405 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 107067 event pairs, 7668 based on Foata normal form. 1/14423 useless extension candidates. Maximal degree in co-relation 26978. Up to 11966 conditions per place. [2024-10-13 12:10:21,188 INFO L140 encePairwiseOnDemand]: 73/78 looper letters, 39 selfloop transitions, 10 changer transitions 0/71 dead transitions. [2024-10-13 12:10:21,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 71 transitions, 301 flow [2024-10-13 12:10:21,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-13 12:10:21,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-13 12:10:21,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 266 transitions. [2024-10-13 12:10:21,192 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42628205128205127 [2024-10-13 12:10:21,193 INFO L175 Difference]: Start difference. First operand has 76 places, 68 transitions, 205 flow. Second operand 8 states and 266 transitions. [2024-10-13 12:10:21,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 71 transitions, 301 flow [2024-10-13 12:10:21,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 71 transitions, 275 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-10-13 12:10:21,196 INFO L231 Difference]: Finished difference. Result has 78 places, 68 transitions, 197 flow [2024-10-13 12:10:21,197 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=197, PETRI_PLACES=78, PETRI_TRANSITIONS=68} [2024-10-13 12:10:21,197 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 3 predicate places. [2024-10-13 12:10:21,197 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 68 transitions, 197 flow [2024-10-13 12:10:21,198 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 28.375) internal successors, (227), 8 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:10:21,198 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:10:21,198 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:10:21,217 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-13 12:10:21,402 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-13 12:10:21,404 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2024-10-13 12:10:21,404 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:10:21,405 INFO L85 PathProgramCache]: Analyzing trace with hash -30780494, now seen corresponding path program 1 times [2024-10-13 12:10:21,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:10:21,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011791005] [2024-10-13 12:10:21,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:21,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:10:21,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:10:21,464 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:10:21,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:10:21,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011791005] [2024-10-13 12:10:21,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011791005] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 12:10:21,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530507993] [2024-10-13 12:10:21,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:21,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:10:21,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:10:21,467 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 12:10:21,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-13 12:10:21,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:10:21,557 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-13 12:10:21,558 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:10:21,572 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:10:21,573 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:10:21,598 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:10:21,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530507993] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:10:21,598 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 12:10:21,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-10-13 12:10:21,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099618383] [2024-10-13 12:10:21,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 12:10:21,599 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-13 12:10:21,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:10:21,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-13 12:10:21,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-10-13 12:10:21,608 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 78 [2024-10-13 12:10:21,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 68 transitions, 197 flow. Second operand has 9 states, 9 states have (on average 30.0) internal successors, (270), 9 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:10:21,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:10:21,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 78 [2024-10-13 12:10:21,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:10:22,901 INFO L124 PetriNetUnfolderBase]: 8632/14652 cut-off events. [2024-10-13 12:10:22,902 INFO L125 PetriNetUnfolderBase]: For 392/392 co-relation queries the response was YES. [2024-10-13 12:10:22,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26997 conditions, 14652 events. 8632/14652 cut-off events. For 392/392 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 107148 event pairs, 7668 based on Foata normal form. 4/14427 useless extension candidates. Maximal degree in co-relation 26984. Up to 11965 conditions per place. [2024-10-13 12:10:23,008 INFO L140 encePairwiseOnDemand]: 74/78 looper letters, 42 selfloop transitions, 8 changer transitions 0/72 dead transitions. [2024-10-13 12:10:23,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 72 transitions, 314 flow [2024-10-13 12:10:23,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-13 12:10:23,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-13 12:10:23,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 278 transitions. [2024-10-13 12:10:23,011 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44551282051282054 [2024-10-13 12:10:23,011 INFO L175 Difference]: Start difference. First operand has 78 places, 68 transitions, 197 flow. Second operand 8 states and 278 transitions. [2024-10-13 12:10:23,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 72 transitions, 314 flow [2024-10-13 12:10:23,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 72 transitions, 296 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-10-13 12:10:23,014 INFO L231 Difference]: Finished difference. Result has 82 places, 68 transitions, 209 flow [2024-10-13 12:10:23,014 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=209, PETRI_PLACES=82, PETRI_TRANSITIONS=68} [2024-10-13 12:10:23,015 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 7 predicate places. [2024-10-13 12:10:23,015 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 68 transitions, 209 flow [2024-10-13 12:10:23,016 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 30.0) internal successors, (270), 9 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:10:23,016 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:10:23,016 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:10:23,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-13 12:10:23,216 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-10-13 12:10:23,217 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2024-10-13 12:10:23,217 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:10:23,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1253644898, now seen corresponding path program 2 times [2024-10-13 12:10:23,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:10:23,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987840346] [2024-10-13 12:10:23,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:23,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:10:23,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:10:23,592 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-10-13 12:10:23,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:10:23,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987840346] [2024-10-13 12:10:23,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987840346] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:10:23,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:10:23,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 12:10:23,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628023950] [2024-10-13 12:10:23,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:10:23,595 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 12:10:23,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:10:23,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 12:10:23,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-13 12:10:23,635 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 78 [2024-10-13 12:10:23,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 68 transitions, 209 flow. Second operand has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:10:23,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:10:23,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 78 [2024-10-13 12:10:23,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:10:25,896 INFO L124 PetriNetUnfolderBase]: 16399/27293 cut-off events. [2024-10-13 12:10:25,896 INFO L125 PetriNetUnfolderBase]: For 658/658 co-relation queries the response was YES. [2024-10-13 12:10:25,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50707 conditions, 27293 events. 16399/27293 cut-off events. For 658/658 co-relation queries the response was YES. Maximal size of possible extension queue 713. Compared 207751 event pairs, 5643 based on Foata normal form. 333/27049 useless extension candidates. Maximal degree in co-relation 50692. Up to 9568 conditions per place. [2024-10-13 12:10:26,115 INFO L140 encePairwiseOnDemand]: 72/78 looper letters, 98 selfloop transitions, 5 changer transitions 0/124 dead transitions. [2024-10-13 12:10:26,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 124 transitions, 547 flow [2024-10-13 12:10:26,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 12:10:26,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-13 12:10:26,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 233 transitions. [2024-10-13 12:10:26,118 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5974358974358974 [2024-10-13 12:10:26,118 INFO L175 Difference]: Start difference. First operand has 82 places, 68 transitions, 209 flow. Second operand 5 states and 233 transitions. [2024-10-13 12:10:26,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 124 transitions, 547 flow [2024-10-13 12:10:26,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 124 transitions, 539 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-13 12:10:26,122 INFO L231 Difference]: Finished difference. Result has 84 places, 70 transitions, 228 flow [2024-10-13 12:10:26,123 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=228, PETRI_PLACES=84, PETRI_TRANSITIONS=70} [2024-10-13 12:10:26,123 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 9 predicate places. [2024-10-13 12:10:26,123 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 70 transitions, 228 flow [2024-10-13 12:10:26,124 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:10:26,124 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:10:26,124 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:10:26,124 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-10-13 12:10:26,125 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2024-10-13 12:10:26,125 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:10:26,125 INFO L85 PathProgramCache]: Analyzing trace with hash 289104072, now seen corresponding path program 1 times [2024-10-13 12:10:26,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:10:26,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753811815] [2024-10-13 12:10:26,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:26,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:10:26,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:10:26,471 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-10-13 12:10:26,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:10:26,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753811815] [2024-10-13 12:10:26,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753811815] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:10:26,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:10:26,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 12:10:26,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129802429] [2024-10-13 12:10:26,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:10:26,472 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 12:10:26,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:10:26,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 12:10:26,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-13 12:10:26,517 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 78 [2024-10-13 12:10:26,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 70 transitions, 228 flow. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 5 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:10:26,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:10:26,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 78 [2024-10-13 12:10:26,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:10:30,937 INFO L124 PetriNetUnfolderBase]: 29468/48957 cut-off events. [2024-10-13 12:10:30,937 INFO L125 PetriNetUnfolderBase]: For 8325/8808 co-relation queries the response was YES. [2024-10-13 12:10:31,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96678 conditions, 48957 events. 29468/48957 cut-off events. For 8325/8808 co-relation queries the response was YES. Maximal size of possible extension queue 1105. Compared 397790 event pairs, 7462 based on Foata normal form. 594/48644 useless extension candidates. Maximal degree in co-relation 96660. Up to 17136 conditions per place. [2024-10-13 12:10:31,265 INFO L140 encePairwiseOnDemand]: 72/78 looper letters, 102 selfloop transitions, 5 changer transitions 0/128 dead transitions. [2024-10-13 12:10:31,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 128 transitions, 604 flow [2024-10-13 12:10:31,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 12:10:31,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-13 12:10:31,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 231 transitions. [2024-10-13 12:10:31,266 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5923076923076923 [2024-10-13 12:10:31,266 INFO L175 Difference]: Start difference. First operand has 84 places, 70 transitions, 228 flow. Second operand 5 states and 231 transitions. [2024-10-13 12:10:31,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 128 transitions, 604 flow [2024-10-13 12:10:31,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 128 transitions, 603 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-13 12:10:31,278 INFO L231 Difference]: Finished difference. Result has 89 places, 72 transitions, 254 flow [2024-10-13 12:10:31,278 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=254, PETRI_PLACES=89, PETRI_TRANSITIONS=72} [2024-10-13 12:10:31,278 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 14 predicate places. [2024-10-13 12:10:31,278 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 72 transitions, 254 flow [2024-10-13 12:10:31,279 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 5 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:10:31,279 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:10:31,279 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 4, 3, 1, 1, 1, 1, 1, 1] [2024-10-13 12:10:31,279 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-10-13 12:10:31,279 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2024-10-13 12:10:31,280 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:10:31,280 INFO L85 PathProgramCache]: Analyzing trace with hash -742635331, now seen corresponding path program 1 times [2024-10-13 12:10:31,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:10:31,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039386101] [2024-10-13 12:10:31,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:31,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:10:31,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 12:10:31,298 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-13 12:10:31,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 12:10:31,313 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-13 12:10:31,314 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-13 12:10:31,314 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (15 of 16 remaining) [2024-10-13 12:10:31,314 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 16 remaining) [2024-10-13 12:10:31,315 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 16 remaining) [2024-10-13 12:10:31,315 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (12 of 16 remaining) [2024-10-13 12:10:31,315 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 16 remaining) [2024-10-13 12:10:31,315 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 16 remaining) [2024-10-13 12:10:31,315 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (9 of 16 remaining) [2024-10-13 12:10:31,315 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 16 remaining) [2024-10-13 12:10:31,315 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 16 remaining) [2024-10-13 12:10:31,316 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (6 of 16 remaining) [2024-10-13 12:10:31,316 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 16 remaining) [2024-10-13 12:10:31,316 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 16 remaining) [2024-10-13 12:10:31,316 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (3 of 16 remaining) [2024-10-13 12:10:31,316 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 16 remaining) [2024-10-13 12:10:31,316 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 16 remaining) [2024-10-13 12:10:31,316 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (0 of 16 remaining) [2024-10-13 12:10:31,317 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-10-13 12:10:31,317 INFO L407 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1] [2024-10-13 12:10:31,318 WARN L239 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-13 12:10:31,318 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-10-13 12:10:31,359 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-13 12:10:31,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 96 places, 100 transitions, 228 flow [2024-10-13 12:10:31,377 INFO L124 PetriNetUnfolderBase]: 13/119 cut-off events. [2024-10-13 12:10:31,378 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-10-13 12:10:31,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138 conditions, 119 events. 13/119 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 380 event pairs, 0 based on Foata normal form. 0/82 useless extension candidates. Maximal degree in co-relation 100. Up to 5 conditions per place. [2024-10-13 12:10:31,379 INFO L82 GeneralOperation]: Start removeDead. Operand has 96 places, 100 transitions, 228 flow [2024-10-13 12:10:31,382 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 96 places, 100 transitions, 228 flow [2024-10-13 12:10:31,384 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 12:10:31,384 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;@4f2bf520, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 12:10:31,384 INFO L334 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2024-10-13 12:10:31,385 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 12:10:31,386 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-10-13 12:10:31,386 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-13 12:10:31,386 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:10:31,386 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-13 12:10:31,386 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 16 more)] === [2024-10-13 12:10:31,386 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:10:31,386 INFO L85 PathProgramCache]: Analyzing trace with hash 526316, now seen corresponding path program 1 times [2024-10-13 12:10:31,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:10:31,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626316390] [2024-10-13 12:10:31,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:31,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:10:31,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:10:31,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:10:31,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:10:31,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626316390] [2024-10-13 12:10:31,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626316390] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:10:31,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:10:31,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-13 12:10:31,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319462667] [2024-10-13 12:10:31,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:10:31,420 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:10:31,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:10:31,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:10:31,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:10:31,435 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 100 [2024-10-13 12:10:31,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 100 transitions, 228 flow. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:10:31,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:10:31,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 100 [2024-10-13 12:10:31,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:10:45,564 INFO L124 PetriNetUnfolderBase]: 119632/179858 cut-off events. [2024-10-13 12:10:45,565 INFO L125 PetriNetUnfolderBase]: For 11956/11956 co-relation queries the response was YES. [2024-10-13 12:10:45,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 338262 conditions, 179858 events. 119632/179858 cut-off events. For 11956/11956 co-relation queries the response was YES. Maximal size of possible extension queue 4931. Compared 1519511 event pairs, 106668 based on Foata normal form. 25424/202901 useless extension candidates. Maximal degree in co-relation 27148. Up to 152966 conditions per place. [2024-10-13 12:10:46,976 INFO L140 encePairwiseOnDemand]: 85/100 looper letters, 49 selfloop transitions, 1 changer transitions 0/80 dead transitions. [2024-10-13 12:10:46,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 80 transitions, 288 flow [2024-10-13 12:10:46,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:10:46,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:10:46,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 157 transitions. [2024-10-13 12:10:46,977 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5233333333333333 [2024-10-13 12:10:46,977 INFO L175 Difference]: Start difference. First operand has 96 places, 100 transitions, 228 flow. Second operand 3 states and 157 transitions. [2024-10-13 12:10:46,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 80 transitions, 288 flow [2024-10-13 12:10:46,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 80 transitions, 282 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-10-13 12:10:46,985 INFO L231 Difference]: Finished difference. Result has 86 places, 80 transitions, 184 flow [2024-10-13 12:10:46,985 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=182, 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=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=184, PETRI_PLACES=86, PETRI_TRANSITIONS=80} [2024-10-13 12:10:46,985 INFO L277 CegarLoopForPetriNet]: 96 programPoint places, -10 predicate places. [2024-10-13 12:10:46,985 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 80 transitions, 184 flow [2024-10-13 12:10:46,986 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:10:46,986 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:10:46,986 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-13 12:10:46,986 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-10-13 12:10:46,986 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 16 more)] === [2024-10-13 12:10:46,986 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:10:46,987 INFO L85 PathProgramCache]: Analyzing trace with hash 526317, now seen corresponding path program 1 times [2024-10-13 12:10:46,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:10:46,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054590125] [2024-10-13 12:10:46,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:46,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:10:46,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:10:47,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:10:47,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:10:47,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054590125] [2024-10-13 12:10:47,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054590125] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:10:47,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:10:47,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-13 12:10:47,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245422338] [2024-10-13 12:10:47,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:10:47,029 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:10:47,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:10:47,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:10:47,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:10:47,047 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 100 [2024-10-13 12:10:47,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 80 transitions, 184 flow. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:10:47,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:10:47,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 100 [2024-10-13 12:10:47,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand