./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/11_fmaxsymopt-pthread.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/11_fmaxsymopt-pthread.i -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 991dbc557cd31e595edd52677120ba8d8af2b607a4ab228e6500c72ebba22de0 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 19:27:43,881 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 19:27:43,926 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-11 19:27:43,929 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 19:27:43,930 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 19:27:43,949 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 19:27:43,950 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 19:27:43,950 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 19:27:43,951 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 19:27:43,951 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 19:27:43,951 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 19:27:43,952 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 19:27:43,952 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 19:27:43,952 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 19:27:43,953 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 19:27:43,953 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 19:27:43,953 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 19:27:43,954 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 19:27:43,954 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 19:27:43,954 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 19:27:43,954 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-11 19:27:43,959 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-11 19:27:43,959 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-11 19:27:43,960 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 19:27:43,960 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-11 19:27:43,960 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 19:27:43,962 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-11 19:27:43,963 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 19:27:43,963 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 19:27:43,963 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 19:27:43,963 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 19:27:43,963 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 19:27:43,963 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 19:27:43,964 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 19:27:43,964 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 19:27:43,964 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 19:27:43,964 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 19:27:43,964 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 19:27:43,965 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 19:27:43,965 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 19:27:43,965 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 19:27:43,967 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 19:27:43,967 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 991dbc557cd31e595edd52677120ba8d8af2b607a4ab228e6500c72ebba22de0 [2024-10-11 19:27:44,168 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 19:27:44,200 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 19:27:44,204 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 19:27:44,205 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 19:27:44,206 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 19:27:44,207 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/11_fmaxsymopt-pthread.i [2024-10-11 19:27:45,681 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 19:27:45,914 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 19:27:45,916 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/11_fmaxsymopt-pthread.i [2024-10-11 19:27:45,932 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/c012861f3/a26851d3b9454ecb8e0c7b8c2866062f/FLAG3835bcfbe [2024-10-11 19:27:46,243 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/c012861f3/a26851d3b9454ecb8e0c7b8c2866062f [2024-10-11 19:27:46,246 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 19:27:46,247 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 19:27:46,249 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 19:27:46,249 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 19:27:46,254 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 19:27:46,254 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 07:27:46" (1/1) ... [2024-10-11 19:27:46,257 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19e98dc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:27:46, skipping insertion in model container [2024-10-11 19:27:46,257 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 07:27:46" (1/1) ... [2024-10-11 19:27:46,293 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 19:27:46,735 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 19:27:46,751 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 19:27:46,794 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 19:27:46,824 INFO L204 MainTranslator]: Completed translation [2024-10-11 19:27:46,824 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:27:46 WrapperNode [2024-10-11 19:27:46,825 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 19:27:46,826 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 19:27:46,826 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 19:27:46,826 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 19:27:46,834 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:27:46" (1/1) ... [2024-10-11 19:27:46,849 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:27:46" (1/1) ... [2024-10-11 19:27:46,871 INFO L138 Inliner]: procedures = 164, calls = 29, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 98 [2024-10-11 19:27:46,872 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 19:27:46,872 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 19:27:46,873 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 19:27:46,873 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 19:27:46,880 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:27:46" (1/1) ... [2024-10-11 19:27:46,881 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:27:46" (1/1) ... [2024-10-11 19:27:46,885 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:27:46" (1/1) ... [2024-10-11 19:27:46,897 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]. [2024-10-11 19:27:46,897 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:27:46" (1/1) ... [2024-10-11 19:27:46,898 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:27:46" (1/1) ... [2024-10-11 19:27:46,902 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:27:46" (1/1) ... [2024-10-11 19:27:46,905 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:27:46" (1/1) ... [2024-10-11 19:27:46,906 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:27:46" (1/1) ... [2024-10-11 19:27:46,907 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:27:46" (1/1) ... [2024-10-11 19:27:46,909 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 19:27:46,909 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 19:27:46,910 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 19:27:46,910 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 19:27:46,910 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:27:46" (1/1) ... [2024-10-11 19:27:46,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 19:27:46,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:27:46,943 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 19:27:46,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 19:27:46,980 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-11 19:27:46,980 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-11 19:27:46,980 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-11 19:27:46,980 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-10-11 19:27:46,980 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-10-11 19:27:46,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-11 19:27:46,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-11 19:27:46,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-11 19:27:46,981 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-10-11 19:27:46,981 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 19:27:46,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-11 19:27:46,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-11 19:27:46,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-11 19:27:46,981 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-10-11 19:27:46,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 19:27:46,981 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 19:27:46,983 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-11 19:27:47,086 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 19:27:47,089 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 19:27:47,354 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-11 19:27:47,354 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 19:27:47,469 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 19:27:47,470 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-11 19:27:47,470 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 07:27:47 BoogieIcfgContainer [2024-10-11 19:27:47,470 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 19:27:47,473 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 19:27:47,473 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 19:27:47,477 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 19:27:47,477 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 07:27:46" (1/3) ... [2024-10-11 19:27:47,478 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43022641 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 07:27:47, skipping insertion in model container [2024-10-11 19:27:47,478 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:27:46" (2/3) ... [2024-10-11 19:27:47,480 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43022641 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 07:27:47, skipping insertion in model container [2024-10-11 19:27:47,480 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 07:27:47" (3/3) ... [2024-10-11 19:27:47,481 INFO L112 eAbstractionObserver]: Analyzing ICFG 11_fmaxsymopt-pthread.i [2024-10-11 19:27:47,495 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 19:27:47,496 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2024-10-11 19:27:47,496 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-11 19:27:47,525 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-11 19:27:47,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 35 places, 37 transitions, 78 flow [2024-10-11 19:27:47,612 INFO L124 PetriNetUnfolderBase]: 5/41 cut-off events. [2024-10-11 19:27:47,612 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 19:27:47,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 41 events. 5/41 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 81 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 29. Up to 2 conditions per place. [2024-10-11 19:27:47,615 INFO L82 GeneralOperation]: Start removeDead. Operand has 35 places, 37 transitions, 78 flow [2024-10-11 19:27:47,617 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 35 places, 37 transitions, 78 flow [2024-10-11 19:27:47,623 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 19:27:47,629 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;@3018ffab, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 19:27:47,629 INFO L334 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2024-10-11 19:27:47,632 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 19:27:47,632 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-10-11 19:27:47,633 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 19:27:47,633 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:27:47,633 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-11 19:27:47,634 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2024-10-11 19:27:47,638 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:27:47,638 INFO L85 PathProgramCache]: Analyzing trace with hash 315512, now seen corresponding path program 1 times [2024-10-11 19:27:47,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:27:47,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34504222] [2024-10-11 19:27:47,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:27:47,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:27:47,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:27:47,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:27:47,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:27:47,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34504222] [2024-10-11 19:27:47,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34504222] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:27:47,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:27:47,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-11 19:27:47,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845137545] [2024-10-11 19:27:47,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:27:47,940 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:27:47,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:27:47,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:27:47,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:27:47,977 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-10-11 19:27:47,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 37 transitions, 78 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:27:47,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:27:47,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-10-11 19:27:47,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:27:48,046 INFO L124 PetriNetUnfolderBase]: 25/88 cut-off events. [2024-10-11 19:27:48,049 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 19:27:48,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149 conditions, 88 events. 25/88 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 239 event pairs, 18 based on Foata normal form. 6/90 useless extension candidates. Maximal degree in co-relation 130. Up to 56 conditions per place. [2024-10-11 19:27:48,052 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 16 selfloop transitions, 1 changer transitions 0/29 dead transitions. [2024-10-11 19:27:48,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 29 transitions, 96 flow [2024-10-11 19:27:48,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:27:48,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:27:48,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 61 transitions. [2024-10-11 19:27:48,064 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5495495495495496 [2024-10-11 19:27:48,065 INFO L175 Difference]: Start difference. First operand has 35 places, 37 transitions, 78 flow. Second operand 3 states and 61 transitions. [2024-10-11 19:27:48,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 29 transitions, 96 flow [2024-10-11 19:27:48,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 29 transitions, 96 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-11 19:27:48,070 INFO L231 Difference]: Finished difference. Result has 31 places, 29 transitions, 64 flow [2024-10-11 19:27:48,073 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=31, PETRI_TRANSITIONS=29} [2024-10-11 19:27:48,076 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, -4 predicate places. [2024-10-11 19:27:48,076 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 29 transitions, 64 flow [2024-10-11 19:27:48,076 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:27:48,076 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:27:48,076 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-11 19:27:48,077 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 19:27:48,077 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2024-10-11 19:27:48,077 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:27:48,077 INFO L85 PathProgramCache]: Analyzing trace with hash 315513, now seen corresponding path program 1 times [2024-10-11 19:27:48,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:27:48,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548602981] [2024-10-11 19:27:48,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:27:48,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:27:48,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:27:48,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:27:48,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:27:48,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548602981] [2024-10-11 19:27:48,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548602981] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:27:48,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:27:48,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-11 19:27:48,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474945727] [2024-10-11 19:27:48,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:27:48,208 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:27:48,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:27:48,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:27:48,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:27:48,220 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-10-11 19:27:48,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 29 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:27:48,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:27:48,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-10-11 19:27:48,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:27:48,314 INFO L124 PetriNetUnfolderBase]: 25/90 cut-off events. [2024-10-11 19:27:48,314 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 19:27:48,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156 conditions, 90 events. 25/90 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 239 event pairs, 18 based on Foata normal form. 0/85 useless extension candidates. Maximal degree in co-relation 149. Up to 58 conditions per place. [2024-10-11 19:27:48,315 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 18 selfloop transitions, 2 changer transitions 0/31 dead transitions. [2024-10-11 19:27:48,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 31 transitions, 108 flow [2024-10-11 19:27:48,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:27:48,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:27:48,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 64 transitions. [2024-10-11 19:27:48,318 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5765765765765766 [2024-10-11 19:27:48,318 INFO L175 Difference]: Start difference. First operand has 31 places, 29 transitions, 64 flow. Second operand 3 states and 64 transitions. [2024-10-11 19:27:48,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 31 transitions, 108 flow [2024-10-11 19:27:48,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 31 transitions, 107 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-11 19:27:48,319 INFO L231 Difference]: Finished difference. Result has 33 places, 30 transitions, 77 flow [2024-10-11 19:27:48,320 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=63, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=77, PETRI_PLACES=33, PETRI_TRANSITIONS=30} [2024-10-11 19:27:48,321 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, -2 predicate places. [2024-10-11 19:27:48,321 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 30 transitions, 77 flow [2024-10-11 19:27:48,322 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:27:48,322 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:27:48,322 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-10-11 19:27:48,322 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-11 19:27:48,323 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2024-10-11 19:27:48,324 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:27:48,324 INFO L85 PathProgramCache]: Analyzing trace with hash 303217908, now seen corresponding path program 1 times [2024-10-11 19:27:48,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:27:48,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975542092] [2024-10-11 19:27:48,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:27:48,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:27:48,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:27:48,465 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:27:48,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:27:48,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975542092] [2024-10-11 19:27:48,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975542092] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:27:48,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96710776] [2024-10-11 19:27:48,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:27:48,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:27:48,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:27:48,471 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:27:48,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-11 19:27:48,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:27:48,538 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-11 19:27:48,541 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:27:48,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:27:48,616 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:27:48,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:27:48,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96710776] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:27:48,663 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 19:27:48,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2024-10-11 19:27:48,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923777478] [2024-10-11 19:27:48,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 19:27:48,664 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-11 19:27:48,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:27:48,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-11 19:27:48,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-10-11 19:27:48,692 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-10-11 19:27:48,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 30 transitions, 77 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:27:48,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:27:48,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-10-11 19:27:48,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:27:48,802 INFO L124 PetriNetUnfolderBase]: 27/98 cut-off events. [2024-10-11 19:27:48,802 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 19:27:48,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 184 conditions, 98 events. 27/98 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 263 event pairs, 18 based on Foata normal form. 1/95 useless extension candidates. Maximal degree in co-relation 175. Up to 60 conditions per place. [2024-10-11 19:27:48,803 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 21 selfloop transitions, 7 changer transitions 0/39 dead transitions. [2024-10-11 19:27:48,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 39 transitions, 161 flow [2024-10-11 19:27:48,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 19:27:48,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 19:27:48,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-10-11 19:27:48,806 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5225225225225225 [2024-10-11 19:27:48,806 INFO L175 Difference]: Start difference. First operand has 33 places, 30 transitions, 77 flow. Second operand 6 states and 116 transitions. [2024-10-11 19:27:48,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 39 transitions, 161 flow [2024-10-11 19:27:48,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 39 transitions, 159 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-11 19:27:48,808 INFO L231 Difference]: Finished difference. Result has 40 places, 35 transitions, 127 flow [2024-10-11 19:27:48,808 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=127, PETRI_PLACES=40, PETRI_TRANSITIONS=35} [2024-10-11 19:27:48,809 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 5 predicate places. [2024-10-11 19:27:48,809 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 35 transitions, 127 flow [2024-10-11 19:27:48,809 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:27:48,809 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:27:48,811 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1] [2024-10-11 19:27:48,826 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-11 19:27:49,011 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:27:49,013 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2024-10-11 19:27:49,014 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:27:49,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1614088245, now seen corresponding path program 1 times [2024-10-11 19:27:49,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:27:49,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092227159] [2024-10-11 19:27:49,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:27:49,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:27:49,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:27:49,075 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 19:27:49,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:27:49,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092227159] [2024-10-11 19:27:49,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092227159] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:27:49,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969381821] [2024-10-11 19:27:49,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:27:49,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:27:49,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:27:49,078 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:27:49,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-11 19:27:49,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:27:49,137 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-11 19:27:49,138 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:27:49,159 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 19:27:49,160 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:27:49,183 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 19:27:49,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969381821] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:27:49,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 19:27:49,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-10-11 19:27:49,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821889109] [2024-10-11 19:27:49,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 19:27:49,185 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-11 19:27:49,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:27:49,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-11 19:27:49,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-10-11 19:27:49,195 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 37 [2024-10-11 19:27:49,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 35 transitions, 127 flow. Second operand has 9 states, 9 states have (on average 17.0) internal successors, (153), 9 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:27:49,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:27:49,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 37 [2024-10-11 19:27:49,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:27:49,264 INFO L124 PetriNetUnfolderBase]: 25/100 cut-off events. [2024-10-11 19:27:49,265 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2024-10-11 19:27:49,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 205 conditions, 100 events. 25/100 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 238 event pairs, 18 based on Foata normal form. 4/101 useless extension candidates. Maximal degree in co-relation 192. Up to 55 conditions per place. [2024-10-11 19:27:49,266 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 20 selfloop transitions, 8 changer transitions 0/40 dead transitions. [2024-10-11 19:27:49,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 40 transitions, 187 flow [2024-10-11 19:27:49,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-11 19:27:49,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-11 19:27:49,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-10-11 19:27:49,269 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5135135135135135 [2024-10-11 19:27:49,269 INFO L175 Difference]: Start difference. First operand has 40 places, 35 transitions, 127 flow. Second operand 8 states and 152 transitions. [2024-10-11 19:27:49,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 40 transitions, 187 flow [2024-10-11 19:27:49,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 40 transitions, 179 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-10-11 19:27:49,273 INFO L231 Difference]: Finished difference. Result has 49 places, 35 transitions, 143 flow [2024-10-11 19:27:49,275 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=143, PETRI_PLACES=49, PETRI_TRANSITIONS=35} [2024-10-11 19:27:49,276 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 14 predicate places. [2024-10-11 19:27:49,276 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 35 transitions, 143 flow [2024-10-11 19:27:49,276 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.0) internal successors, (153), 9 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:27:49,276 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:27:49,276 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-10-11 19:27:49,292 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-11 19:27:49,480 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:27:49,481 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2024-10-11 19:27:49,482 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:27:49,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1574965733, now seen corresponding path program 2 times [2024-10-11 19:27:49,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:27:49,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272483926] [2024-10-11 19:27:49,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:27:49,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:27:49,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:27:49,737 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:27:49,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:27:49,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272483926] [2024-10-11 19:27:49,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272483926] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:27:49,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63069738] [2024-10-11 19:27:49,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 19:27:49,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:27:49,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:27:49,740 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:27:49,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-11 19:27:49,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 19:27:49,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 19:27:49,798 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-11 19:27:49,800 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:27:49,962 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:27:49,963 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:27:49,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63069738] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:27:49,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-11 19:27:49,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 12 [2024-10-11 19:27:49,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858406475] [2024-10-11 19:27:49,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:27:49,964 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-11 19:27:49,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:27:49,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-11 19:27:49,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2024-10-11 19:27:49,995 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-10-11 19:27:49,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 35 transitions, 143 flow. Second operand has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:27:49,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:27:49,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-10-11 19:27:49,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:27:50,061 INFO L124 PetriNetUnfolderBase]: 25/98 cut-off events. [2024-10-11 19:27:50,062 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-10-11 19:27:50,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214 conditions, 98 events. 25/98 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 236 event pairs, 18 based on Foata normal form. 2/97 useless extension candidates. Maximal degree in co-relation 197. Up to 54 conditions per place. [2024-10-11 19:27:50,063 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 17 selfloop transitions, 10 changer transitions 0/38 dead transitions. [2024-10-11 19:27:50,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 38 transitions, 203 flow [2024-10-11 19:27:50,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-11 19:27:50,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-11 19:27:50,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-10-11 19:27:50,064 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46621621621621623 [2024-10-11 19:27:50,064 INFO L175 Difference]: Start difference. First operand has 49 places, 35 transitions, 143 flow. Second operand 8 states and 138 transitions. [2024-10-11 19:27:50,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 38 transitions, 203 flow [2024-10-11 19:27:50,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 38 transitions, 177 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-10-11 19:27:50,066 INFO L231 Difference]: Finished difference. Result has 48 places, 35 transitions, 139 flow [2024-10-11 19:27:50,066 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=139, PETRI_PLACES=48, PETRI_TRANSITIONS=35} [2024-10-11 19:27:50,067 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 13 predicate places. [2024-10-11 19:27:50,067 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 35 transitions, 139 flow [2024-10-11 19:27:50,067 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:27:50,067 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:27:50,068 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 2, 1, 1, 1, 1, 1] [2024-10-11 19:27:50,084 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-11 19:27:50,271 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:27:50,272 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2024-10-11 19:27:50,272 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:27:50,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1608639071, now seen corresponding path program 2 times [2024-10-11 19:27:50,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:27:50,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112171583] [2024-10-11 19:27:50,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:27:50,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:27:50,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 19:27:50,307 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-11 19:27:50,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 19:27:50,335 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-11 19:27:50,336 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-11 19:27:50,336 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 10 remaining) [2024-10-11 19:27:50,338 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 10 remaining) [2024-10-11 19:27:50,338 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 10 remaining) [2024-10-11 19:27:50,338 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (6 of 10 remaining) [2024-10-11 19:27:50,338 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 10 remaining) [2024-10-11 19:27:50,339 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 10 remaining) [2024-10-11 19:27:50,339 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (3 of 10 remaining) [2024-10-11 19:27:50,339 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 10 remaining) [2024-10-11 19:27:50,339 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 10 remaining) [2024-10-11 19:27:50,339 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (0 of 10 remaining) [2024-10-11 19:27:50,339 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-11 19:27:50,340 INFO L407 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1] [2024-10-11 19:27:50,342 WARN L239 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-11 19:27:50,342 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-10-11 19:27:50,364 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-11 19:27:50,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 58 places, 62 transitions, 134 flow [2024-10-11 19:27:50,373 INFO L124 PetriNetUnfolderBase]: 9/71 cut-off events. [2024-10-11 19:27:50,373 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-11 19:27:50,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79 conditions, 71 events. 9/71 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 202 event pairs, 0 based on Foata normal form. 0/48 useless extension candidates. Maximal degree in co-relation 53. Up to 3 conditions per place. [2024-10-11 19:27:50,373 INFO L82 GeneralOperation]: Start removeDead. Operand has 58 places, 62 transitions, 134 flow [2024-10-11 19:27:50,374 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 58 places, 62 transitions, 134 flow [2024-10-11 19:27:50,375 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 19:27:50,376 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;@3018ffab, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 19:27:50,376 INFO L334 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2024-10-11 19:27:50,377 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 19:27:50,377 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-10-11 19:27:50,377 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 19:27:50,377 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:27:50,377 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-11 19:27:50,377 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2024-10-11 19:27:50,378 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:27:50,378 INFO L85 PathProgramCache]: Analyzing trace with hash 377078, now seen corresponding path program 1 times [2024-10-11 19:27:50,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:27:50,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077269945] [2024-10-11 19:27:50,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:27:50,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:27:50,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:27:50,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:27:50,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:27:50,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077269945] [2024-10-11 19:27:50,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077269945] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:27:50,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:27:50,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-11 19:27:50,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107771245] [2024-10-11 19:27:50,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:27:50,406 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:27:50,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:27:50,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:27:50,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:27:50,419 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 62 [2024-10-11 19:27:50,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 62 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:27:50,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:27:50,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 62 [2024-10-11 19:27:50,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:27:50,559 INFO L124 PetriNetUnfolderBase]: 548/1213 cut-off events. [2024-10-11 19:27:50,559 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-10-11 19:27:50,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2115 conditions, 1213 events. 548/1213 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 7076 event pairs, 468 based on Foata normal form. 182/1336 useless extension candidates. Maximal degree in co-relation 1288. Up to 866 conditions per place. [2024-10-11 19:27:50,569 INFO L140 encePairwiseOnDemand]: 53/62 looper letters, 27 selfloop transitions, 1 changer transitions 0/50 dead transitions. [2024-10-11 19:27:50,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 50 transitions, 166 flow [2024-10-11 19:27:50,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:27:50,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:27:50,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 105 transitions. [2024-10-11 19:27:50,572 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5645161290322581 [2024-10-11 19:27:50,572 INFO L175 Difference]: Start difference. First operand has 58 places, 62 transitions, 134 flow. Second operand 3 states and 105 transitions. [2024-10-11 19:27:50,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 50 transitions, 166 flow [2024-10-11 19:27:50,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 50 transitions, 166 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-11 19:27:50,575 INFO L231 Difference]: Finished difference. Result has 52 places, 50 transitions, 112 flow [2024-10-11 19:27:50,575 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=52, PETRI_TRANSITIONS=50} [2024-10-11 19:27:50,575 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, -6 predicate places. [2024-10-11 19:27:50,577 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 50 transitions, 112 flow [2024-10-11 19:27:50,577 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:27:50,578 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:27:50,578 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-11 19:27:50,578 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-11 19:27:50,578 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2024-10-11 19:27:50,578 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:27:50,578 INFO L85 PathProgramCache]: Analyzing trace with hash 377079, now seen corresponding path program 1 times [2024-10-11 19:27:50,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:27:50,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3063033] [2024-10-11 19:27:50,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:27:50,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:27:50,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:27:50,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:27:50,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:27:50,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3063033] [2024-10-11 19:27:50,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3063033] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:27:50,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:27:50,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-11 19:27:50,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459742574] [2024-10-11 19:27:50,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:27:50,626 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:27:50,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:27:50,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:27:50,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:27:50,638 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 62 [2024-10-11 19:27:50,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 50 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:27:50,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:27:50,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 62 [2024-10-11 19:27:50,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:27:50,760 INFO L124 PetriNetUnfolderBase]: 548/1215 cut-off events. [2024-10-11 19:27:50,760 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-10-11 19:27:50,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2122 conditions, 1215 events. 548/1215 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 7076 event pairs, 468 based on Foata normal form. 0/1155 useless extension candidates. Maximal degree in co-relation 2114. Up to 868 conditions per place. [2024-10-11 19:27:50,767 INFO L140 encePairwiseOnDemand]: 58/62 looper letters, 29 selfloop transitions, 2 changer transitions 0/52 dead transitions. [2024-10-11 19:27:50,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 52 transitions, 178 flow [2024-10-11 19:27:50,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:27:50,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:27:50,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 108 transitions. [2024-10-11 19:27:50,770 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5806451612903226 [2024-10-11 19:27:50,770 INFO L175 Difference]: Start difference. First operand has 52 places, 50 transitions, 112 flow. Second operand 3 states and 108 transitions. [2024-10-11 19:27:50,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 52 transitions, 178 flow [2024-10-11 19:27:50,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 52 transitions, 177 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-11 19:27:50,771 INFO L231 Difference]: Finished difference. Result has 54 places, 51 transitions, 125 flow [2024-10-11 19:27:50,771 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=125, PETRI_PLACES=54, PETRI_TRANSITIONS=51} [2024-10-11 19:27:50,771 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, -4 predicate places. [2024-10-11 19:27:50,772 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 51 transitions, 125 flow [2024-10-11 19:27:50,772 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:27:50,772 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:27:50,772 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-10-11 19:27:50,772 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-11 19:27:50,772 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2024-10-11 19:27:50,774 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:27:50,774 INFO L85 PathProgramCache]: Analyzing trace with hash 362384818, now seen corresponding path program 1 times [2024-10-11 19:27:50,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:27:50,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296883220] [2024-10-11 19:27:50,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:27:50,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:27:50,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:27:50,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:27:50,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:27:50,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296883220] [2024-10-11 19:27:50,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296883220] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:27:50,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871429875] [2024-10-11 19:27:50,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:27:50,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:27:50,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:27:50,836 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:27:50,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-11 19:27:50,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:27:50,914 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-11 19:27:50,915 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:27:50,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:27:50,960 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:27:51,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:27:51,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871429875] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:27:51,004 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 19:27:51,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2024-10-11 19:27:51,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010277733] [2024-10-11 19:27:51,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 19:27:51,004 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-11 19:27:51,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:27:51,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-11 19:27:51,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-10-11 19:27:51,061 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 62 [2024-10-11 19:27:51,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 51 transitions, 125 flow. Second operand has 8 states, 8 states have (on average 26.875) internal successors, (215), 8 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:27:51,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:27:51,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 62 [2024-10-11 19:27:51,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:27:51,270 INFO L124 PetriNetUnfolderBase]: 550/1223 cut-off events. [2024-10-11 19:27:51,271 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-10-11 19:27:51,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2150 conditions, 1223 events. 550/1223 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 7097 event pairs, 468 based on Foata normal form. 1/1165 useless extension candidates. Maximal degree in co-relation 2140. Up to 870 conditions per place. [2024-10-11 19:27:51,276 INFO L140 encePairwiseOnDemand]: 58/62 looper letters, 32 selfloop transitions, 7 changer transitions 0/60 dead transitions. [2024-10-11 19:27:51,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 60 transitions, 231 flow [2024-10-11 19:27:51,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 19:27:51,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 19:27:51,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 193 transitions. [2024-10-11 19:27:51,277 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5188172043010753 [2024-10-11 19:27:51,278 INFO L175 Difference]: Start difference. First operand has 54 places, 51 transitions, 125 flow. Second operand 6 states and 193 transitions. [2024-10-11 19:27:51,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 60 transitions, 231 flow [2024-10-11 19:27:51,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 60 transitions, 229 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-11 19:27:51,280 INFO L231 Difference]: Finished difference. Result has 61 places, 56 transitions, 175 flow [2024-10-11 19:27:51,280 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=175, PETRI_PLACES=61, PETRI_TRANSITIONS=56} [2024-10-11 19:27:51,281 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 3 predicate places. [2024-10-11 19:27:51,282 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 56 transitions, 175 flow [2024-10-11 19:27:51,282 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 26.875) internal successors, (215), 8 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:27:51,282 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:27:51,282 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-10-11 19:27:51,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-11 19:27:51,486 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-10-11 19:27:51,487 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2024-10-11 19:27:51,487 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:27:51,488 INFO L85 PathProgramCache]: Analyzing trace with hash -448912541, now seen corresponding path program 2 times [2024-10-11 19:27:51,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:27:51,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63216026] [2024-10-11 19:27:51,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:27:51,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:27:51,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:27:51,615 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:27:51,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:27:51,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63216026] [2024-10-11 19:27:51,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63216026] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:27:51,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543116238] [2024-10-11 19:27:51,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 19:27:51,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:27:51,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:27:51,617 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:27:51,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-11 19:27:51,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 19:27:51,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 19:27:51,677 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-11 19:27:51,677 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:27:52,032 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:27:52,032 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:27:52,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543116238] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:27:52,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-11 19:27:52,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 12 [2024-10-11 19:27:52,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607040095] [2024-10-11 19:27:52,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:27:52,033 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-11 19:27:52,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:27:52,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-11 19:27:52,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2024-10-11 19:27:52,133 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 62 [2024-10-11 19:27:52,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 56 transitions, 175 flow. Second operand has 8 states, 8 states have (on average 26.375) internal successors, (211), 8 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:27:52,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:27:52,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 62 [2024-10-11 19:27:52,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:27:52,347 INFO L124 PetriNetUnfolderBase]: 550/1222 cut-off events. [2024-10-11 19:27:52,347 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2024-10-11 19:27:52,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2163 conditions, 1222 events. 550/1222 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 7076 event pairs, 468 based on Foata normal form. 1/1165 useless extension candidates. Maximal degree in co-relation 2149. Up to 866 conditions per place. [2024-10-11 19:27:52,353 INFO L140 encePairwiseOnDemand]: 57/62 looper letters, 28 selfloop transitions, 10 changer transitions 0/59 dead transitions. [2024-10-11 19:27:52,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 59 transitions, 249 flow [2024-10-11 19:27:52,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-11 19:27:52,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-11 19:27:52,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 239 transitions. [2024-10-11 19:27:52,385 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48185483870967744 [2024-10-11 19:27:52,385 INFO L175 Difference]: Start difference. First operand has 61 places, 56 transitions, 175 flow. Second operand 8 states and 239 transitions. [2024-10-11 19:27:52,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 59 transitions, 249 flow [2024-10-11 19:27:52,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 59 transitions, 223 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-10-11 19:27:52,387 INFO L231 Difference]: Finished difference. Result has 63 places, 56 transitions, 167 flow [2024-10-11 19:27:52,387 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=167, PETRI_PLACES=63, PETRI_TRANSITIONS=56} [2024-10-11 19:27:52,387 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 5 predicate places. [2024-10-11 19:27:52,387 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 56 transitions, 167 flow [2024-10-11 19:27:52,388 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 26.375) internal successors, (211), 8 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:27:52,388 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:27:52,388 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:27:52,404 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-11 19:27:52,588 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-11 19:27:52,588 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2024-10-11 19:27:52,589 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:27:52,589 INFO L85 PathProgramCache]: Analyzing trace with hash -409036415, now seen corresponding path program 1 times [2024-10-11 19:27:52,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:27:52,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771670929] [2024-10-11 19:27:52,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:27:52,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:27:52,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:27:52,649 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:27:52,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:27:52,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771670929] [2024-10-11 19:27:52,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771670929] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:27:52,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813223818] [2024-10-11 19:27:52,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:27:52,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:27:52,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:27:52,651 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:27:52,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-11 19:27:52,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:27:52,712 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-11 19:27:52,713 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:27:52,723 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:27:52,723 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:27:52,743 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:27:52,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813223818] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:27:52,743 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 19:27:52,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-10-11 19:27:52,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656859415] [2024-10-11 19:27:52,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 19:27:52,744 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-11 19:27:52,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:27:52,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-11 19:27:52,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-10-11 19:27:52,754 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 62 [2024-10-11 19:27:52,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 56 transitions, 167 flow. Second operand has 9 states, 9 states have (on average 28.0) internal successors, (252), 9 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:27:52,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:27:52,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 62 [2024-10-11 19:27:52,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:27:52,866 INFO L124 PetriNetUnfolderBase]: 548/1223 cut-off events. [2024-10-11 19:27:52,866 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2024-10-11 19:27:52,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2167 conditions, 1223 events. 548/1223 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 7076 event pairs, 468 based on Foata normal form. 4/1169 useless extension candidates. Maximal degree in co-relation 2155. Up to 865 conditions per place. [2024-10-11 19:27:52,872 INFO L140 encePairwiseOnDemand]: 58/62 looper letters, 31 selfloop transitions, 8 changer transitions 0/60 dead transitions. [2024-10-11 19:27:52,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 60 transitions, 262 flow [2024-10-11 19:27:52,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-11 19:27:52,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-11 19:27:52,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 251 transitions. [2024-10-11 19:27:52,874 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5060483870967742 [2024-10-11 19:27:52,874 INFO L175 Difference]: Start difference. First operand has 63 places, 56 transitions, 167 flow. Second operand 8 states and 251 transitions. [2024-10-11 19:27:52,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 60 transitions, 262 flow [2024-10-11 19:27:52,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 60 transitions, 244 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-10-11 19:27:52,875 INFO L231 Difference]: Finished difference. Result has 67 places, 56 transitions, 179 flow [2024-10-11 19:27:52,876 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=179, PETRI_PLACES=67, PETRI_TRANSITIONS=56} [2024-10-11 19:27:52,876 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 9 predicate places. [2024-10-11 19:27:52,876 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 56 transitions, 179 flow [2024-10-11 19:27:52,876 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 28.0) internal successors, (252), 9 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:27:52,876 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:27:52,876 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:27:52,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-11 19:27:53,077 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-11 19:27:53,077 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2024-10-11 19:27:53,078 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:27:53,078 INFO L85 PathProgramCache]: Analyzing trace with hash -734801939, now seen corresponding path program 2 times [2024-10-11 19:27:53,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:27:53,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414450827] [2024-10-11 19:27:53,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:27:53,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:27:53,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:27:53,252 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-10-11 19:27:53,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:27:53,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414450827] [2024-10-11 19:27:53,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414450827] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:27:53,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:27:53,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 19:27:53,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203604250] [2024-10-11 19:27:53,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:27:53,253 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 19:27:53,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:27:53,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 19:27:53,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-11 19:27:53,278 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 62 [2024-10-11 19:27:53,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 56 transitions, 179 flow. Second operand has 5 states, 5 states have (on average 26.8) internal successors, (134), 5 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:27:53,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:27:53,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 62 [2024-10-11 19:27:53,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:27:53,527 INFO L124 PetriNetUnfolderBase]: 700/1799 cut-off events. [2024-10-11 19:27:53,528 INFO L125 PetriNetUnfolderBase]: For 43/43 co-relation queries the response was YES. [2024-10-11 19:27:53,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3018 conditions, 1799 events. 700/1799 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 12688 event pairs, 468 based on Foata normal form. 33/1741 useless extension candidates. Maximal degree in co-relation 3004. Up to 877 conditions per place. [2024-10-11 19:27:53,537 INFO L140 encePairwiseOnDemand]: 56/62 looper letters, 59 selfloop transitions, 5 changer transitions 0/84 dead transitions. [2024-10-11 19:27:53,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 84 transitions, 373 flow [2024-10-11 19:27:53,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 19:27:53,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 19:27:53,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 184 transitions. [2024-10-11 19:27:53,539 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5935483870967742 [2024-10-11 19:27:53,539 INFO L175 Difference]: Start difference. First operand has 67 places, 56 transitions, 179 flow. Second operand 5 states and 184 transitions. [2024-10-11 19:27:53,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 84 transitions, 373 flow [2024-10-11 19:27:53,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 84 transitions, 365 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-11 19:27:53,542 INFO L231 Difference]: Finished difference. Result has 69 places, 58 transitions, 198 flow [2024-10-11 19:27:53,542 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=198, PETRI_PLACES=69, PETRI_TRANSITIONS=58} [2024-10-11 19:27:53,543 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 11 predicate places. [2024-10-11 19:27:53,543 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 58 transitions, 198 flow [2024-10-11 19:27:53,543 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.8) internal successors, (134), 5 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:27:53,543 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:27:53,543 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 3, 2, 1, 1, 1, 1, 1] [2024-10-11 19:27:53,544 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-11 19:27:53,544 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2024-10-11 19:27:53,544 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:27:53,544 INFO L85 PathProgramCache]: Analyzing trace with hash -185967053, now seen corresponding path program 1 times [2024-10-11 19:27:53,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:27:53,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062121482] [2024-10-11 19:27:53,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:27:53,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:27:53,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 19:27:53,571 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-11 19:27:53,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 19:27:53,594 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-11 19:27:53,594 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-11 19:27:53,595 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 13 remaining) [2024-10-11 19:27:53,595 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 13 remaining) [2024-10-11 19:27:53,595 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 13 remaining) [2024-10-11 19:27:53,595 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (9 of 13 remaining) [2024-10-11 19:27:53,595 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 13 remaining) [2024-10-11 19:27:53,595 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 13 remaining) [2024-10-11 19:27:53,595 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (6 of 13 remaining) [2024-10-11 19:27:53,595 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 13 remaining) [2024-10-11 19:27:53,596 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 13 remaining) [2024-10-11 19:27:53,599 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (3 of 13 remaining) [2024-10-11 19:27:53,599 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 13 remaining) [2024-10-11 19:27:53,599 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 13 remaining) [2024-10-11 19:27:53,599 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (0 of 13 remaining) [2024-10-11 19:27:53,599 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-10-11 19:27:53,600 INFO L407 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1] [2024-10-11 19:27:53,600 WARN L239 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-11 19:27:53,600 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-10-11 19:27:53,636 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-11 19:27:53,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 87 transitions, 192 flow [2024-10-11 19:27:53,649 INFO L124 PetriNetUnfolderBase]: 13/101 cut-off events. [2024-10-11 19:27:53,650 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-10-11 19:27:53,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 101 events. 13/101 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 337 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 77. Up to 4 conditions per place. [2024-10-11 19:27:53,654 INFO L82 GeneralOperation]: Start removeDead. Operand has 81 places, 87 transitions, 192 flow [2024-10-11 19:27:53,655 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 81 places, 87 transitions, 192 flow [2024-10-11 19:27:53,656 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 19:27:53,657 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;@3018ffab, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 19:27:53,658 INFO L334 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2024-10-11 19:27:53,659 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 19:27:53,662 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-10-11 19:27:53,662 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 19:27:53,662 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:27:53,662 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-11 19:27:53,663 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2024-10-11 19:27:53,663 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:27:53,663 INFO L85 PathProgramCache]: Analyzing trace with hash 463469, now seen corresponding path program 1 times [2024-10-11 19:27:53,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:27:53,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979419576] [2024-10-11 19:27:53,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:27:53,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:27:53,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:27:53,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:27:53,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:27:53,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979419576] [2024-10-11 19:27:53,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979419576] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:27:53,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:27:53,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-11 19:27:53,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834657264] [2024-10-11 19:27:53,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:27:53,714 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:27:53,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:27:53,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:27:53,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:27:53,736 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 87 [2024-10-11 19:27:53,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 87 transitions, 192 flow. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:27:53,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:27:53,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 87 [2024-10-11 19:27:53,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:27:54,885 INFO L124 PetriNetUnfolderBase]: 8783/15207 cut-off events. [2024-10-11 19:27:54,885 INFO L125 PetriNetUnfolderBase]: For 720/720 co-relation queries the response was YES. [2024-10-11 19:27:54,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27610 conditions, 15207 events. 8783/15207 cut-off events. For 720/720 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 114914 event pairs, 7668 based on Foata normal form. 2972/17545 useless extension candidates. Maximal degree in co-relation 2768. Up to 11966 conditions per place. [2024-10-11 19:27:55,083 INFO L140 encePairwiseOnDemand]: 75/87 looper letters, 38 selfloop transitions, 1 changer transitions 0/71 dead transitions. [2024-10-11 19:27:55,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 71 transitions, 238 flow [2024-10-11 19:27:55,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:27:55,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:27:55,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 149 transitions. [2024-10-11 19:27:55,084 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5708812260536399 [2024-10-11 19:27:55,085 INFO L175 Difference]: Start difference. First operand has 81 places, 87 transitions, 192 flow. Second operand 3 states and 149 transitions. [2024-10-11 19:27:55,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 71 transitions, 238 flow [2024-10-11 19:27:55,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 71 transitions, 236 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-10-11 19:27:55,086 INFO L231 Difference]: Finished difference. Result has 73 places, 71 transitions, 160 flow [2024-10-11 19:27:55,087 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=160, PETRI_PLACES=73, PETRI_TRANSITIONS=71} [2024-10-11 19:27:55,087 INFO L277 CegarLoopForPetriNet]: 81 programPoint places, -8 predicate places. [2024-10-11 19:27:55,087 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 71 transitions, 160 flow [2024-10-11 19:27:55,087 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:27:55,087 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:27:55,088 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-11 19:27:55,088 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-10-11 19:27:55,088 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2024-10-11 19:27:55,088 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:27:55,088 INFO L85 PathProgramCache]: Analyzing trace with hash 463470, now seen corresponding path program 1 times [2024-10-11 19:27:55,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:27:55,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97272556] [2024-10-11 19:27:55,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:27:55,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:27:55,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:27:55,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:27:55,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:27:55,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97272556] [2024-10-11 19:27:55,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97272556] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:27:55,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:27:55,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-11 19:27:55,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942000725] [2024-10-11 19:27:55,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:27:55,121 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:27:55,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:27:55,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:27:55,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:27:55,133 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 87 [2024-10-11 19:27:55,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 71 transitions, 160 flow. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:27:55,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:27:55,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 87 [2024-10-11 19:27:55,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:27:56,094 INFO L124 PetriNetUnfolderBase]: 8783/15209 cut-off events. [2024-10-11 19:27:56,095 INFO L125 PetriNetUnfolderBase]: For 424/424 co-relation queries the response was YES. [2024-10-11 19:27:56,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27517 conditions, 15209 events. 8783/15209 cut-off events. For 424/424 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 114903 event pairs, 7668 based on Foata normal form. 0/14574 useless extension candidates. Maximal degree in co-relation 27508. Up to 11968 conditions per place. [2024-10-11 19:27:56,168 INFO L140 encePairwiseOnDemand]: 83/87 looper letters, 40 selfloop transitions, 2 changer transitions 0/73 dead transitions. [2024-10-11 19:27:56,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 73 transitions, 248 flow [2024-10-11 19:27:56,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:27:56,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:27:56,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 152 transitions. [2024-10-11 19:27:56,170 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5823754789272031 [2024-10-11 19:27:56,170 INFO L175 Difference]: Start difference. First operand has 73 places, 71 transitions, 160 flow. Second operand 3 states and 152 transitions. [2024-10-11 19:27:56,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 73 transitions, 248 flow [2024-10-11 19:27:56,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 73 transitions, 247 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-11 19:27:56,172 INFO L231 Difference]: Finished difference. Result has 75 places, 72 transitions, 173 flow [2024-10-11 19:27:56,172 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=173, PETRI_PLACES=75, PETRI_TRANSITIONS=72} [2024-10-11 19:27:56,173 INFO L277 CegarLoopForPetriNet]: 81 programPoint places, -6 predicate places. [2024-10-11 19:27:56,173 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 72 transitions, 173 flow [2024-10-11 19:27:56,173 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:27:56,173 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:27:56,173 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-10-11 19:27:56,173 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-10-11 19:27:56,173 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2024-10-11 19:27:56,174 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:27:56,174 INFO L85 PathProgramCache]: Analyzing trace with hash 445409353, now seen corresponding path program 1 times [2024-10-11 19:27:56,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:27:56,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008168159] [2024-10-11 19:27:56,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:27:56,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:27:56,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:27:56,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:27:56,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:27:56,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008168159] [2024-10-11 19:27:56,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008168159] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:27:56,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789948607] [2024-10-11 19:27:56,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:27:56,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:27:56,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:27:56,219 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:27:56,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-11 19:27:56,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:27:56,273 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-11 19:27:56,273 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:27:56,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:27:56,310 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:27:56,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:27:56,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789948607] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:27:56,337 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 19:27:56,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2024-10-11 19:27:56,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287575835] [2024-10-11 19:27:56,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 19:27:56,338 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-11 19:27:56,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:27:56,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-11 19:27:56,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-10-11 19:27:56,400 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 87 [2024-10-11 19:27:56,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 72 transitions, 173 flow. Second operand has 8 states, 8 states have (on average 37.875) internal successors, (303), 8 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:27:56,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:27:56,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 87 [2024-10-11 19:27:56,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:27:57,755 INFO L124 PetriNetUnfolderBase]: 8785/15217 cut-off events. [2024-10-11 19:27:57,755 INFO L125 PetriNetUnfolderBase]: For 424/424 co-relation queries the response was YES. [2024-10-11 19:27:57,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27545 conditions, 15217 events. 8785/15217 cut-off events. For 424/424 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 114948 event pairs, 7668 based on Foata normal form. 1/14584 useless extension candidates. Maximal degree in co-relation 27534. Up to 11970 conditions per place. [2024-10-11 19:27:57,826 INFO L140 encePairwiseOnDemand]: 83/87 looper letters, 43 selfloop transitions, 7 changer transitions 0/81 dead transitions. [2024-10-11 19:27:57,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 81 transitions, 301 flow [2024-10-11 19:27:57,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 19:27:57,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 19:27:57,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 270 transitions. [2024-10-11 19:27:57,828 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5172413793103449 [2024-10-11 19:27:57,828 INFO L175 Difference]: Start difference. First operand has 75 places, 72 transitions, 173 flow. Second operand 6 states and 270 transitions. [2024-10-11 19:27:57,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 81 transitions, 301 flow [2024-10-11 19:27:57,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 81 transitions, 299 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-11 19:27:57,830 INFO L231 Difference]: Finished difference. Result has 82 places, 77 transitions, 223 flow [2024-10-11 19:27:57,831 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=223, PETRI_PLACES=82, PETRI_TRANSITIONS=77} [2024-10-11 19:27:57,832 INFO L277 CegarLoopForPetriNet]: 81 programPoint places, 1 predicate places. [2024-10-11 19:27:57,832 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 77 transitions, 223 flow [2024-10-11 19:27:57,832 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 37.875) internal successors, (303), 8 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:27:57,832 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:27:57,832 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:27:57,847 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-11 19:27:58,032 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:27:58,033 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2024-10-11 19:27:58,034 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:27:58,034 INFO L85 PathProgramCache]: Analyzing trace with hash -892975008, now seen corresponding path program 1 times [2024-10-11 19:27:58,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:27:58,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725871918] [2024-10-11 19:27:58,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:27:58,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:27:58,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:27:58,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:27:58,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:27:58,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725871918] [2024-10-11 19:27:58,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725871918] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:27:58,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832429296] [2024-10-11 19:27:58,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:27:58,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:27:58,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:27:58,077 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:27:58,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-11 19:27:58,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:27:58,150 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-11 19:27:58,150 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:27:58,159 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:27:58,159 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:27:58,177 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:27:58,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832429296] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:27:58,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 19:27:58,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-10-11 19:27:58,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726640081] [2024-10-11 19:27:58,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 19:27:58,178 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-11 19:27:58,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:27:58,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-11 19:27:58,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-10-11 19:27:58,185 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 87 [2024-10-11 19:27:58,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 77 transitions, 223 flow. Second operand has 9 states, 9 states have (on average 39.0) internal successors, (351), 9 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:27:58,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:27:58,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 87 [2024-10-11 19:27:58,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:27:59,334 INFO L124 PetriNetUnfolderBase]: 8783/15219 cut-off events. [2024-10-11 19:27:59,334 INFO L125 PetriNetUnfolderBase]: For 448/448 co-relation queries the response was YES. [2024-10-11 19:27:59,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27566 conditions, 15219 events. 8783/15219 cut-off events. For 448/448 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 114922 event pairs, 7668 based on Foata normal form. 4/14590 useless extension candidates. Maximal degree in co-relation 27551. Up to 11965 conditions per place. [2024-10-11 19:27:59,410 INFO L140 encePairwiseOnDemand]: 83/87 looper letters, 42 selfloop transitions, 8 changer transitions 0/82 dead transitions. [2024-10-11 19:27:59,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 82 transitions, 327 flow [2024-10-11 19:27:59,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-11 19:27:59,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-11 19:27:59,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 350 transitions. [2024-10-11 19:27:59,412 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5028735632183908 [2024-10-11 19:27:59,412 INFO L175 Difference]: Start difference. First operand has 82 places, 77 transitions, 223 flow. Second operand 8 states and 350 transitions. [2024-10-11 19:27:59,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 82 transitions, 327 flow [2024-10-11 19:27:59,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 82 transitions, 319 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-10-11 19:27:59,418 INFO L231 Difference]: Finished difference. Result has 91 places, 77 transitions, 239 flow [2024-10-11 19:27:59,418 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=239, PETRI_PLACES=91, PETRI_TRANSITIONS=77} [2024-10-11 19:27:59,418 INFO L277 CegarLoopForPetriNet]: 81 programPoint places, 10 predicate places. [2024-10-11 19:27:59,419 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 77 transitions, 239 flow [2024-10-11 19:27:59,419 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 39.0) internal successors, (351), 9 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:27:59,419 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:27:59,419 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-10-11 19:27:59,440 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-11 19:27:59,619 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-11 19:27:59,620 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2024-10-11 19:27:59,621 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:27:59,621 INFO L85 PathProgramCache]: Analyzing trace with hash -933566118, now seen corresponding path program 2 times [2024-10-11 19:27:59,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:27:59,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111440140] [2024-10-11 19:27:59,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:27:59,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:27:59,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:27:59,814 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:27:59,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:27:59,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111440140] [2024-10-11 19:27:59,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111440140] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:27:59,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241736736] [2024-10-11 19:27:59,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 19:27:59,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:27:59,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:27:59,818 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:27:59,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-11 19:27:59,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 19:27:59,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 19:27:59,879 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-11 19:27:59,880 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:28:00,003 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:28:00,004 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:28:00,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241736736] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:28:00,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-11 19:28:00,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 12 [2024-10-11 19:28:00,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555956951] [2024-10-11 19:28:00,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:28:00,004 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-11 19:28:00,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:28:00,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-11 19:28:00,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2024-10-11 19:28:00,046 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 87 [2024-10-11 19:28:00,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 77 transitions, 239 flow. Second operand has 8 states, 8 states have (on average 37.375) internal successors, (299), 8 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:28:00,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:28:00,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 87 [2024-10-11 19:28:00,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:28:01,254 INFO L124 PetriNetUnfolderBase]: 8783/15217 cut-off events. [2024-10-11 19:28:01,255 INFO L125 PetriNetUnfolderBase]: For 457/457 co-relation queries the response was YES. [2024-10-11 19:28:01,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27575 conditions, 15217 events. 8783/15217 cut-off events. For 457/457 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 114811 event pairs, 7668 based on Foata normal form. 2/14586 useless extension candidates. Maximal degree in co-relation 27556. Up to 11964 conditions per place. [2024-10-11 19:28:01,337 INFO L140 encePairwiseOnDemand]: 82/87 looper letters, 39 selfloop transitions, 10 changer transitions 0/80 dead transitions. [2024-10-11 19:28:01,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 80 transitions, 343 flow [2024-10-11 19:28:01,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-11 19:28:01,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-11 19:28:01,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 336 transitions. [2024-10-11 19:28:01,339 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4827586206896552 [2024-10-11 19:28:01,339 INFO L175 Difference]: Start difference. First operand has 91 places, 77 transitions, 239 flow. Second operand 8 states and 336 transitions. [2024-10-11 19:28:01,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 80 transitions, 343 flow [2024-10-11 19:28:01,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 80 transitions, 317 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-10-11 19:28:01,341 INFO L231 Difference]: Finished difference. Result has 90 places, 77 transitions, 235 flow [2024-10-11 19:28:01,341 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=235, PETRI_PLACES=90, PETRI_TRANSITIONS=77} [2024-10-11 19:28:01,341 INFO L277 CegarLoopForPetriNet]: 81 programPoint places, 9 predicate places. [2024-10-11 19:28:01,341 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 77 transitions, 235 flow [2024-10-11 19:28:01,342 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 37.375) internal successors, (299), 8 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:28:01,342 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:28:01,342 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:28:01,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-11 19:28:01,545 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-10-11 19:28:01,545 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2024-10-11 19:28:01,546 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:28:01,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1945793356, now seen corresponding path program 2 times [2024-10-11 19:28:01,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:28:01,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977097707] [2024-10-11 19:28:01,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:28:01,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:28:01,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:28:01,701 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-10-11 19:28:01,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:28:01,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977097707] [2024-10-11 19:28:01,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977097707] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:28:01,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:28:01,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 19:28:01,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475542494] [2024-10-11 19:28:01,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:28:01,702 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 19:28:01,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:28:01,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 19:28:01,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-11 19:28:01,725 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 87 [2024-10-11 19:28:01,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 77 transitions, 235 flow. Second operand has 5 states, 5 states have (on average 37.8) internal successors, (189), 5 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:28:01,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:28:01,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 87 [2024-10-11 19:28:01,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:28:03,119 INFO L124 PetriNetUnfolderBase]: 11305/22128 cut-off events. [2024-10-11 19:28:03,120 INFO L125 PetriNetUnfolderBase]: For 476/476 co-relation queries the response was YES. [2024-10-11 19:28:03,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38177 conditions, 22128 events. 11305/22128 cut-off events. For 476/476 co-relation queries the response was YES. Maximal size of possible extension queue 825. Compared 202519 event pairs, 7668 based on Foata normal form. 333/21380 useless extension candidates. Maximal degree in co-relation 38160. Up to 11977 conditions per place. [2024-10-11 19:28:03,263 INFO L140 encePairwiseOnDemand]: 81/87 looper letters, 92 selfloop transitions, 5 changer transitions 0/127 dead transitions. [2024-10-11 19:28:03,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 127 transitions, 549 flow [2024-10-11 19:28:03,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 19:28:03,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 19:28:03,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 272 transitions. [2024-10-11 19:28:03,265 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6252873563218391 [2024-10-11 19:28:03,265 INFO L175 Difference]: Start difference. First operand has 90 places, 77 transitions, 235 flow. Second operand 5 states and 272 transitions. [2024-10-11 19:28:03,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 127 transitions, 549 flow [2024-10-11 19:28:03,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 127 transitions, 535 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-10-11 19:28:03,268 INFO L231 Difference]: Finished difference. Result has 90 places, 79 transitions, 248 flow [2024-10-11 19:28:03,268 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=248, PETRI_PLACES=90, PETRI_TRANSITIONS=79} [2024-10-11 19:28:03,268 INFO L277 CegarLoopForPetriNet]: 81 programPoint places, 9 predicate places. [2024-10-11 19:28:03,268 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 79 transitions, 248 flow [2024-10-11 19:28:03,268 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 37.8) internal successors, (189), 5 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:28:03,269 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:28:03,269 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:28:03,269 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-10-11 19:28:03,269 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2024-10-11 19:28:03,269 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:28:03,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1102395577, now seen corresponding path program 1 times [2024-10-11 19:28:03,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:28:03,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320966436] [2024-10-11 19:28:03,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:28:03,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:28:03,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:28:03,409 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-10-11 19:28:03,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:28:03,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320966436] [2024-10-11 19:28:03,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320966436] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:28:03,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:28:03,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 19:28:03,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440069439] [2024-10-11 19:28:03,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:28:03,410 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 19:28:03,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:28:03,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 19:28:03,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-11 19:28:03,451 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 87 [2024-10-11 19:28:03,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 79 transitions, 248 flow. Second operand has 5 states, 5 states have (on average 38.2) internal successors, (191), 5 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:28:03,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:28:03,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 87 [2024-10-11 19:28:03,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:28:05,696 INFO L124 PetriNetUnfolderBase]: 13517/26657 cut-off events. [2024-10-11 19:28:05,696 INFO L125 PetriNetUnfolderBase]: For 5680/6088 co-relation queries the response was YES. [2024-10-11 19:28:05,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49764 conditions, 26657 events. 13517/26657 cut-off events. For 5680/6088 co-relation queries the response was YES. Maximal size of possible extension queue 951. Compared 250374 event pairs, 9268 based on Foata normal form. 396/25814 useless extension candidates. Maximal degree in co-relation 49746. Up to 14369 conditions per place. [2024-10-11 19:28:05,856 INFO L140 encePairwiseOnDemand]: 81/87 looper letters, 96 selfloop transitions, 5 changer transitions 0/131 dead transitions. [2024-10-11 19:28:05,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 131 transitions, 600 flow [2024-10-11 19:28:05,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 19:28:05,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 19:28:05,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 270 transitions. [2024-10-11 19:28:05,857 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6206896551724138 [2024-10-11 19:28:05,857 INFO L175 Difference]: Start difference. First operand has 90 places, 79 transitions, 248 flow. Second operand 5 states and 270 transitions. [2024-10-11 19:28:05,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 131 transitions, 600 flow [2024-10-11 19:28:05,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 131 transitions, 599 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-11 19:28:05,861 INFO L231 Difference]: Finished difference. Result has 95 places, 81 transitions, 274 flow [2024-10-11 19:28:05,861 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=274, PETRI_PLACES=95, PETRI_TRANSITIONS=81} [2024-10-11 19:28:05,861 INFO L277 CegarLoopForPetriNet]: 81 programPoint places, 14 predicate places. [2024-10-11 19:28:05,861 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 81 transitions, 274 flow [2024-10-11 19:28:05,862 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.2) internal successors, (191), 5 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:28:05,862 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:28:05,862 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:28:05,862 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-10-11 19:28:05,862 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2024-10-11 19:28:05,862 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:28:05,862 INFO L85 PathProgramCache]: Analyzing trace with hash -2043221292, now seen corresponding path program 1 times [2024-10-11 19:28:05,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:28:05,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049753767] [2024-10-11 19:28:05,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:28:05,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:28:05,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:28:06,020 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-10-11 19:28:06,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:28:06,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049753767] [2024-10-11 19:28:06,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049753767] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:28:06,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544886032] [2024-10-11 19:28:06,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:28:06,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:28:06,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:28:06,023 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:28:06,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-11 19:28:06,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:28:06,103 INFO L255 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-11 19:28:06,104 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:28:06,334 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-10-11 19:28:06,334 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:28:06,600 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-10-11 19:28:06,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544886032] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:28:06,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 19:28:06,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-10-11 19:28:06,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588316041] [2024-10-11 19:28:06,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 19:28:06,601 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-11 19:28:06,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:28:06,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-11 19:28:06,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-10-11 19:28:06,724 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 87 [2024-10-11 19:28:06,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 81 transitions, 274 flow. Second operand has 11 states, 11 states have (on average 38.72727272727273) internal successors, (426), 11 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:28:06,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:28:06,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 87 [2024-10-11 19:28:06,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:28:10,183 INFO L124 PetriNetUnfolderBase]: 22172/42680 cut-off events. [2024-10-11 19:28:10,183 INFO L125 PetriNetUnfolderBase]: For 12921/13515 co-relation queries the response was YES. [2024-10-11 19:28:10,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85953 conditions, 42680 events. 22172/42680 cut-off events. For 12921/13515 co-relation queries the response was YES. Maximal size of possible extension queue 1458. Compared 419597 event pairs, 8638 based on Foata normal form. 399/41927 useless extension candidates. Maximal degree in co-relation 85932. Up to 14756 conditions per place. [2024-10-11 19:28:10,549 INFO L140 encePairwiseOnDemand]: 81/87 looper letters, 131 selfloop transitions, 7 changer transitions 0/168 dead transitions. [2024-10-11 19:28:10,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 168 transitions, 816 flow [2024-10-11 19:28:10,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 19:28:10,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 19:28:10,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 340 transitions. [2024-10-11 19:28:10,551 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6513409961685823 [2024-10-11 19:28:10,551 INFO L175 Difference]: Start difference. First operand has 95 places, 81 transitions, 274 flow. Second operand 6 states and 340 transitions. [2024-10-11 19:28:10,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 168 transitions, 816 flow [2024-10-11 19:28:10,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 168 transitions, 815 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-11 19:28:10,562 INFO L231 Difference]: Finished difference. Result has 101 places, 84 transitions, 314 flow [2024-10-11 19:28:10,562 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=314, PETRI_PLACES=101, PETRI_TRANSITIONS=84} [2024-10-11 19:28:10,562 INFO L277 CegarLoopForPetriNet]: 81 programPoint places, 20 predicate places. [2024-10-11 19:28:10,562 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 84 transitions, 314 flow [2024-10-11 19:28:10,563 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 38.72727272727273) internal successors, (426), 11 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:28:10,563 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:28:10,563 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:28:10,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-10-11 19:28:10,766 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-10-11 19:28:10,766 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err2ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2024-10-11 19:28:10,767 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:28:10,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1084629011, now seen corresponding path program 1 times [2024-10-11 19:28:10,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:28:10,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706118203] [2024-10-11 19:28:10,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:28:10,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:28:10,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:28:10,819 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-10-11 19:28:10,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:28:10,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706118203] [2024-10-11 19:28:10,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706118203] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:28:10,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:28:10,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 19:28:10,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843664586] [2024-10-11 19:28:10,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:28:10,820 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:28:10,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:28:10,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:28:10,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:28:10,824 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 87 [2024-10-11 19:28:10,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 84 transitions, 314 flow. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:28:10,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:28:10,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 87 [2024-10-11 19:28:10,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:28:13,995 INFO L124 PetriNetUnfolderBase]: 21128/37365 cut-off events. [2024-10-11 19:28:13,996 INFO L125 PetriNetUnfolderBase]: For 15722/16325 co-relation queries the response was YES. [2024-10-11 19:28:14,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84046 conditions, 37365 events. 21128/37365 cut-off events. For 15722/16325 co-relation queries the response was YES. Maximal size of possible extension queue 1169. Compared 327423 event pairs, 2500 based on Foata normal form. 1197/37565 useless extension candidates. Maximal degree in co-relation 84022. Up to 24777 conditions per place. [2024-10-11 19:28:14,324 INFO L140 encePairwiseOnDemand]: 84/87 looper letters, 76 selfloop transitions, 3 changer transitions 0/109 dead transitions. [2024-10-11 19:28:14,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 109 transitions, 550 flow [2024-10-11 19:28:14,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:28:14,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:28:14,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 173 transitions. [2024-10-11 19:28:14,326 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6628352490421456 [2024-10-11 19:28:14,326 INFO L175 Difference]: Start difference. First operand has 101 places, 84 transitions, 314 flow. Second operand 3 states and 173 transitions. [2024-10-11 19:28:14,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 109 transitions, 550 flow [2024-10-11 19:28:14,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 109 transitions, 547 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-11 19:28:14,353 INFO L231 Difference]: Finished difference. Result has 101 places, 83 transitions, 315 flow [2024-10-11 19:28:14,353 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=315, PETRI_PLACES=101, PETRI_TRANSITIONS=83} [2024-10-11 19:28:14,353 INFO L277 CegarLoopForPetriNet]: 81 programPoint places, 20 predicate places. [2024-10-11 19:28:14,354 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 83 transitions, 315 flow [2024-10-11 19:28:14,354 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:28:14,354 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:28:14,354 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 4, 3, 1, 1, 1, 1, 1, 1] [2024-10-11 19:28:14,354 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-10-11 19:28:14,354 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2024-10-11 19:28:14,354 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:28:14,354 INFO L85 PathProgramCache]: Analyzing trace with hash 287831253, now seen corresponding path program 1 times [2024-10-11 19:28:14,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:28:14,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790373639] [2024-10-11 19:28:14,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:28:14,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:28:14,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 19:28:14,365 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-11 19:28:14,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 19:28:14,375 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-11 19:28:14,376 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-11 19:28:14,376 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (15 of 16 remaining) [2024-10-11 19:28:14,376 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 16 remaining) [2024-10-11 19:28:14,376 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 16 remaining) [2024-10-11 19:28:14,376 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (12 of 16 remaining) [2024-10-11 19:28:14,376 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 16 remaining) [2024-10-11 19:28:14,376 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 16 remaining) [2024-10-11 19:28:14,376 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (9 of 16 remaining) [2024-10-11 19:28:14,376 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 16 remaining) [2024-10-11 19:28:14,377 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 16 remaining) [2024-10-11 19:28:14,377 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (6 of 16 remaining) [2024-10-11 19:28:14,377 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 16 remaining) [2024-10-11 19:28:14,377 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 16 remaining) [2024-10-11 19:28:14,377 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (3 of 16 remaining) [2024-10-11 19:28:14,377 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 16 remaining) [2024-10-11 19:28:14,377 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 16 remaining) [2024-10-11 19:28:14,377 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (0 of 16 remaining) [2024-10-11 19:28:14,377 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-10-11 19:28:14,377 INFO L407 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1] [2024-10-11 19:28:14,378 WARN L239 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-11 19:28:14,378 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-10-11 19:28:14,400 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-11 19:28:14,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 104 places, 112 transitions, 252 flow [2024-10-11 19:28:14,408 INFO L124 PetriNetUnfolderBase]: 17/131 cut-off events. [2024-10-11 19:28:14,408 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-10-11 19:28:14,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150 conditions, 131 events. 17/131 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 477 event pairs, 0 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 109. Up to 5 conditions per place. [2024-10-11 19:28:14,409 INFO L82 GeneralOperation]: Start removeDead. Operand has 104 places, 112 transitions, 252 flow [2024-10-11 19:28:14,410 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 104 places, 112 transitions, 252 flow [2024-10-11 19:28:14,410 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 19:28:14,411 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;@3018ffab, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 19:28:14,411 INFO L334 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2024-10-11 19:28:14,411 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 19:28:14,411 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-10-11 19:28:14,411 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 19:28:14,412 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:28:14,412 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-11 19:28:14,412 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 16 more)] === [2024-10-11 19:28:14,412 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:28:14,412 INFO L85 PathProgramCache]: Analyzing trace with hash 574685, now seen corresponding path program 1 times [2024-10-11 19:28:14,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:28:14,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030268577] [2024-10-11 19:28:14,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:28:14,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:28:14,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:28:14,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:28:14,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:28:14,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030268577] [2024-10-11 19:28:14,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030268577] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:28:14,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:28:14,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-11 19:28:14,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129903874] [2024-10-11 19:28:14,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:28:14,433 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:28:14,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:28:14,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:28:14,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:28:14,446 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 112 [2024-10-11 19:28:14,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 112 transitions, 252 flow. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:28:14,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:28:14,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 112 [2024-10-11 19:28:14,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:28:27,933 INFO L124 PetriNetUnfolderBase]: 120998/183954 cut-off events. [2024-10-11 19:28:27,933 INFO L125 PetriNetUnfolderBase]: For 12412/12412 co-relation queries the response was YES. [2024-10-11 19:28:28,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 342358 conditions, 183954 events. 120998/183954 cut-off events. For 12412/12412 co-relation queries the response was YES. Maximal size of possible extension queue 5211. Compared 1584113 event pairs, 106668 based on Foata normal form. 42805/220364 useless extension candidates. Maximal degree in co-relation 27715. Up to 152966 conditions per place. [2024-10-11 19:28:29,292 INFO L140 encePairwiseOnDemand]: 97/112 looper letters, 49 selfloop transitions, 1 changer transitions 0/92 dead transitions. [2024-10-11 19:28:29,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 92 transitions, 312 flow [2024-10-11 19:28:29,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:28:29,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:28:29,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 193 transitions. [2024-10-11 19:28:29,294 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5744047619047619 [2024-10-11 19:28:29,294 INFO L175 Difference]: Start difference. First operand has 104 places, 112 transitions, 252 flow. Second operand 3 states and 193 transitions. [2024-10-11 19:28:29,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 92 transitions, 312 flow [2024-10-11 19:28:29,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 92 transitions, 306 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-10-11 19:28:29,300 INFO L231 Difference]: Finished difference. Result has 94 places, 92 transitions, 208 flow [2024-10-11 19:28:29,300 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=112, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=208, PETRI_PLACES=94, PETRI_TRANSITIONS=92} [2024-10-11 19:28:29,300 INFO L277 CegarLoopForPetriNet]: 104 programPoint places, -10 predicate places. [2024-10-11 19:28:29,301 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 92 transitions, 208 flow [2024-10-11 19:28:29,301 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:28:29,301 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:28:29,301 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-11 19:28:29,301 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-10-11 19:28:29,301 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 16 more)] === [2024-10-11 19:28:29,301 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:28:29,302 INFO L85 PathProgramCache]: Analyzing trace with hash 574686, now seen corresponding path program 1 times [2024-10-11 19:28:29,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:28:29,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720957499] [2024-10-11 19:28:29,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:28:29,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:28:29,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:28:29,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:28:29,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:28:29,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720957499] [2024-10-11 19:28:29,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720957499] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:28:29,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:28:29,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-11 19:28:29,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352733165] [2024-10-11 19:28:29,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:28:29,333 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:28:29,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:28:29,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:28:29,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:28:29,346 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 112 [2024-10-11 19:28:29,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 92 transitions, 208 flow. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 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) [2024-10-11 19:28:29,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:28:29,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 112 [2024-10-11 19:28:29,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand