./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-word-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version fca748b1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-word-symm.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash bf81f7b3bd1ceac2bf46c7c37f69effc0af9de17b18c7565156301fb49a6164e --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dd.update-z3-fca748b-m [2024-11-20 17:41:25,696 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-20 17:41:25,786 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-20 17:41:25,791 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-20 17:41:25,792 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-20 17:41:25,818 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-20 17:41:25,819 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-20 17:41:25,820 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-20 17:41:25,820 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-20 17:41:25,823 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-20 17:41:25,824 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-20 17:41:25,824 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-20 17:41:25,825 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-20 17:41:25,825 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-20 17:41:25,825 INFO L153 SettingsManager]: * Use SBE=true [2024-11-20 17:41:25,826 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-20 17:41:25,826 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-20 17:41:25,830 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-20 17:41:25,830 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-20 17:41:25,831 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-20 17:41:25,831 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-20 17:41:25,832 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-20 17:41:25,832 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-20 17:41:25,832 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-20 17:41:25,845 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-20 17:41:25,845 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-20 17:41:25,846 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-20 17:41:25,846 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-20 17:41:25,846 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-20 17:41:25,846 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-20 17:41:25,847 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-20 17:41:25,847 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-20 17:41:25,847 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-20 17:41:25,848 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 17:41:25,848 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-20 17:41:25,848 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-20 17:41:25,848 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-20 17:41:25,849 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-20 17:41:25,849 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-20 17:41:25,849 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-20 17:41:25,850 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-20 17:41:25,850 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-20 17:41:25,850 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bf81f7b3bd1ceac2bf46c7c37f69effc0af9de17b18c7565156301fb49a6164e [2024-11-20 17:41:26,128 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-20 17:41:26,153 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-20 17:41:26,158 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-20 17:41:26,159 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-20 17:41:26,159 INFO L274 PluginConnector]: CDTParser initialized [2024-11-20 17:41:26,160 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2024-11-20 17:41:27,698 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-20 17:41:27,868 INFO L384 CDTParser]: Found 1 translation units. [2024-11-20 17:41:27,868 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2024-11-20 17:41:27,877 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46e7c3a70/db7cfb6d8dbc4ab4a20489b589725b6d/FLAG4cb296cc4 [2024-11-20 17:41:27,891 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46e7c3a70/db7cfb6d8dbc4ab4a20489b589725b6d [2024-11-20 17:41:27,894 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-20 17:41:27,896 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-20 17:41:27,899 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-20 17:41:27,901 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-20 17:41:27,906 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-20 17:41:27,907 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:41:27" (1/1) ... [2024-11-20 17:41:27,908 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42665e64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:41:27, skipping insertion in model container [2024-11-20 17:41:27,908 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:41:27" (1/1) ... [2024-11-20 17:41:27,932 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-20 17:41:28,127 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-20 17:41:28,129 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 17:41:28,140 INFO L200 MainTranslator]: Completed pre-run [2024-11-20 17:41:28,167 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 17:41:28,184 INFO L204 MainTranslator]: Completed translation [2024-11-20 17:41:28,185 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:41:28 WrapperNode [2024-11-20 17:41:28,185 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-20 17:41:28,186 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-20 17:41:28,186 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-20 17:41:28,186 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-20 17:41:28,193 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:41:28" (1/1) ... [2024-11-20 17:41:28,200 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:41:28" (1/1) ... [2024-11-20 17:41:28,222 INFO L138 Inliner]: procedures = 23, calls = 26, calls flagged for inlining = 10, calls inlined = 12, statements flattened = 125 [2024-11-20 17:41:28,222 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-20 17:41:28,223 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-20 17:41:28,223 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-20 17:41:28,223 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-20 17:41:28,237 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:41:28" (1/1) ... [2024-11-20 17:41:28,238 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:41:28" (1/1) ... [2024-11-20 17:41:28,240 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:41:28" (1/1) ... [2024-11-20 17:41:28,261 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [10, 2]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [0, 2]. The 2 writes are split as follows [2, 0]. [2024-11-20 17:41:28,261 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:41:28" (1/1) ... [2024-11-20 17:41:28,261 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:41:28" (1/1) ... [2024-11-20 17:41:28,270 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:41:28" (1/1) ... [2024-11-20 17:41:28,274 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:41:28" (1/1) ... [2024-11-20 17:41:28,276 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:41:28" (1/1) ... [2024-11-20 17:41:28,277 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:41:28" (1/1) ... [2024-11-20 17:41:28,281 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-20 17:41:28,282 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-20 17:41:28,282 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-20 17:41:28,282 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-20 17:41:28,283 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:41:28" (1/1) ... [2024-11-20 17:41:28,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 17:41:28,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:41:28,314 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-20 17:41:28,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-20 17:41:28,366 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-20 17:41:28,366 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-20 17:41:28,366 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-20 17:41:28,367 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-20 17:41:28,367 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-20 17:41:28,367 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-20 17:41:28,367 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-20 17:41:28,367 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-20 17:41:28,367 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-20 17:41:28,367 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-20 17:41:28,367 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-20 17:41:28,368 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-20 17:41:28,368 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-20 17:41:28,368 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-20 17:41:28,370 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-20 17:41:28,462 INFO L238 CfgBuilder]: Building ICFG [2024-11-20 17:41:28,465 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-20 17:41:28,967 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-20 17:41:28,968 INFO L287 CfgBuilder]: Performing block encoding [2024-11-20 17:41:29,278 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-20 17:41:29,279 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-20 17:41:29,281 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:41:29 BoogieIcfgContainer [2024-11-20 17:41:29,281 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-20 17:41:29,283 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-20 17:41:29,283 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-20 17:41:29,290 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-20 17:41:29,292 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 05:41:27" (1/3) ... [2024-11-20 17:41:29,293 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7366f13d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:41:29, skipping insertion in model container [2024-11-20 17:41:29,293 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:41:28" (2/3) ... [2024-11-20 17:41:29,293 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7366f13d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:41:29, skipping insertion in model container [2024-11-20 17:41:29,295 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:41:29" (3/3) ... [2024-11-20 17:41:29,296 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-word-symm.wvr.c [2024-11-20 17:41:29,331 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-20 17:41:29,331 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2024-11-20 17:41:29,331 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-20 17:41:29,405 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-20 17:41:29,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 66 transitions, 146 flow [2024-11-20 17:41:29,489 INFO L124 PetriNetUnfolderBase]: 8/64 cut-off events. [2024-11-20 17:41:29,489 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-20 17:41:29,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73 conditions, 64 events. 8/64 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 174 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2024-11-20 17:41:29,494 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 66 transitions, 146 flow [2024-11-20 17:41:29,499 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 62 places, 63 transitions, 138 flow [2024-11-20 17:41:29,514 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-20 17:41:29,521 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;@62963d8f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-20 17:41:29,523 INFO L334 AbstractCegarLoop]: Starting to check reachability of 40 error locations. [2024-11-20 17:41:29,531 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-20 17:41:29,531 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-20 17:41:29,532 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-20 17:41:29,532 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:41:29,533 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-20 17:41:29,533 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-20 17:41:29,539 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:41:29,540 INFO L85 PathProgramCache]: Analyzing trace with hash 580331, now seen corresponding path program 1 times [2024-11-20 17:41:29,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:41:29,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244449425] [2024-11-20 17:41:29,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:41:29,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:41:29,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:41:29,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:41:29,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:41:29,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244449425] [2024-11-20 17:41:29,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244449425] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:41:29,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:41:29,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-20 17:41:29,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269390252] [2024-11-20 17:41:29,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:41:29,828 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:41:29,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:41:29,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:41:29,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:41:29,942 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 66 [2024-11-20 17:41:29,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 63 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:41:29,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:41:29,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 66 [2024-11-20 17:41:29,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:41:30,151 INFO L124 PetriNetUnfolderBase]: 233/554 cut-off events. [2024-11-20 17:41:30,153 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-11-20 17:41:30,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 941 conditions, 554 events. 233/554 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2985 event pairs, 138 based on Foata normal form. 1/370 useless extension candidates. Maximal degree in co-relation 872. Up to 354 conditions per place. [2024-11-20 17:41:30,163 INFO L140 encePairwiseOnDemand]: 61/66 looper letters, 30 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2024-11-20 17:41:30,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 59 transitions, 194 flow [2024-11-20 17:41:30,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:41:30,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:41:30,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 125 transitions. [2024-11-20 17:41:30,178 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6313131313131313 [2024-11-20 17:41:30,180 INFO L175 Difference]: Start difference. First operand has 62 places, 63 transitions, 138 flow. Second operand 3 states and 125 transitions. [2024-11-20 17:41:30,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 59 transitions, 194 flow [2024-11-20 17:41:30,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 59 transitions, 186 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-20 17:41:30,190 INFO L231 Difference]: Finished difference. Result has 56 places, 59 transitions, 126 flow [2024-11-20 17:41:30,194 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=56, PETRI_TRANSITIONS=59} [2024-11-20 17:41:30,199 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, -6 predicate places. [2024-11-20 17:41:30,200 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 59 transitions, 126 flow [2024-11-20 17:41:30,200 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:41:30,200 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:41:30,201 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-20 17:41:30,201 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-20 17:41:30,201 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-20 17:41:30,203 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:41:30,203 INFO L85 PathProgramCache]: Analyzing trace with hash 580332, now seen corresponding path program 1 times [2024-11-20 17:41:30,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:41:30,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694579925] [2024-11-20 17:41:30,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:41:30,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:41:30,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:41:30,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:41:30,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:41:30,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694579925] [2024-11-20 17:41:30,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694579925] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:41:30,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:41:30,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 17:41:30,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515605307] [2024-11-20 17:41:30,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:41:30,567 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:41:30,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:41:30,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:41:30,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:41:30,634 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 66 [2024-11-20 17:41:30,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 59 transitions, 126 flow. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:41:30,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:41:30,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 66 [2024-11-20 17:41:30,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:41:30,826 INFO L124 PetriNetUnfolderBase]: 234/557 cut-off events. [2024-11-20 17:41:30,826 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-11-20 17:41:30,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 934 conditions, 557 events. 234/557 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3000 event pairs, 138 based on Foata normal form. 0/370 useless extension candidates. Maximal degree in co-relation 905. Up to 363 conditions per place. [2024-11-20 17:41:30,834 INFO L140 encePairwiseOnDemand]: 61/66 looper letters, 33 selfloop transitions, 4 changer transitions 0/62 dead transitions. [2024-11-20 17:41:30,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 62 transitions, 206 flow [2024-11-20 17:41:30,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 17:41:30,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 17:41:30,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 158 transitions. [2024-11-20 17:41:30,837 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5984848484848485 [2024-11-20 17:41:30,837 INFO L175 Difference]: Start difference. First operand has 56 places, 59 transitions, 126 flow. Second operand 4 states and 158 transitions. [2024-11-20 17:41:30,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 62 transitions, 206 flow [2024-11-20 17:41:30,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 62 transitions, 202 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:41:30,841 INFO L231 Difference]: Finished difference. Result has 59 places, 62 transitions, 149 flow [2024-11-20 17:41:30,841 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=149, PETRI_PLACES=59, PETRI_TRANSITIONS=62} [2024-11-20 17:41:30,842 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, -3 predicate places. [2024-11-20 17:41:30,843 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 62 transitions, 149 flow [2024-11-20 17:41:30,843 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:41:30,843 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:41:30,843 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-20 17:41:30,844 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-20 17:41:30,844 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-20 17:41:30,845 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:41:30,845 INFO L85 PathProgramCache]: Analyzing trace with hash 17991939, now seen corresponding path program 1 times [2024-11-20 17:41:30,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:41:30,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297522604] [2024-11-20 17:41:30,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:41:30,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:41:30,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:41:31,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:41:31,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:41:31,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297522604] [2024-11-20 17:41:31,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297522604] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:41:31,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:41:31,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 17:41:31,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613505372] [2024-11-20 17:41:31,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:41:31,128 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:41:31,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:41:31,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:41:31,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-20 17:41:31,257 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 66 [2024-11-20 17:41:31,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 62 transitions, 149 flow. Second operand has 5 states, 5 states have (on average 30.8) internal successors, (154), 5 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:41:31,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:41:31,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 66 [2024-11-20 17:41:31,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:41:31,428 INFO L124 PetriNetUnfolderBase]: 235/560 cut-off events. [2024-11-20 17:41:31,429 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-11-20 17:41:31,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 951 conditions, 560 events. 235/560 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3026 event pairs, 138 based on Foata normal form. 0/372 useless extension candidates. Maximal degree in co-relation 926. Up to 362 conditions per place. [2024-11-20 17:41:31,434 INFO L140 encePairwiseOnDemand]: 58/66 looper letters, 33 selfloop transitions, 7 changer transitions 0/65 dead transitions. [2024-11-20 17:41:31,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 65 transitions, 235 flow [2024-11-20 17:41:31,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:41:31,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:41:31,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 191 transitions. [2024-11-20 17:41:31,437 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5787878787878787 [2024-11-20 17:41:31,437 INFO L175 Difference]: Start difference. First operand has 59 places, 62 transitions, 149 flow. Second operand 5 states and 191 transitions. [2024-11-20 17:41:31,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 65 transitions, 235 flow [2024-11-20 17:41:31,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 65 transitions, 232 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 17:41:31,442 INFO L231 Difference]: Finished difference. Result has 64 places, 65 transitions, 183 flow [2024-11-20 17:41:31,443 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=183, PETRI_PLACES=64, PETRI_TRANSITIONS=65} [2024-11-20 17:41:31,444 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 2 predicate places. [2024-11-20 17:41:31,444 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 65 transitions, 183 flow [2024-11-20 17:41:31,444 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.8) internal successors, (154), 5 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:41:31,444 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:41:31,445 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-20 17:41:31,445 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-20 17:41:31,445 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-20 17:41:31,445 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:41:31,445 INFO L85 PathProgramCache]: Analyzing trace with hash 557718160, now seen corresponding path program 1 times [2024-11-20 17:41:31,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:41:31,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539095423] [2024-11-20 17:41:31,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:41:31,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:41:31,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:41:31,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:41:31,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:41:31,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539095423] [2024-11-20 17:41:31,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539095423] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:41:31,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796280227] [2024-11-20 17:41:31,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:41:31,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:41:31,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:41:31,652 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:41:31,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-20 17:41:31,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:41:31,714 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-20 17:41:31,718 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:41:31,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-20 17:41:32,032 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:41:32,033 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:41:32,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:41:32,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796280227] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:41:32,148 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:41:32,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-20 17:41:32,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523963892] [2024-11-20 17:41:32,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:41:32,149 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-20 17:41:32,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:41:32,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-20 17:41:32,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-20 17:41:32,568 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 66 [2024-11-20 17:41:32,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 65 transitions, 183 flow. Second operand has 11 states, 11 states have (on average 31.363636363636363) internal successors, (345), 11 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:41:32,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:41:32,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 66 [2024-11-20 17:41:32,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:41:32,872 INFO L124 PetriNetUnfolderBase]: 236/562 cut-off events. [2024-11-20 17:41:32,873 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2024-11-20 17:41:32,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 974 conditions, 562 events. 236/562 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3043 event pairs, 138 based on Foata normal form. 0/377 useless extension candidates. Maximal degree in co-relation 936. Up to 363 conditions per place. [2024-11-20 17:41:32,878 INFO L140 encePairwiseOnDemand]: 61/66 looper letters, 32 selfloop transitions, 10 changer transitions 0/67 dead transitions. [2024-11-20 17:41:32,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 67 transitions, 278 flow [2024-11-20 17:41:32,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-20 17:41:32,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-20 17:41:32,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 281 transitions. [2024-11-20 17:41:32,883 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5321969696969697 [2024-11-20 17:41:32,884 INFO L175 Difference]: Start difference. First operand has 64 places, 65 transitions, 183 flow. Second operand 8 states and 281 transitions. [2024-11-20 17:41:32,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 67 transitions, 278 flow [2024-11-20 17:41:32,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 67 transitions, 277 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 17:41:32,886 INFO L231 Difference]: Finished difference. Result has 69 places, 67 transitions, 213 flow [2024-11-20 17:41:32,886 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=213, PETRI_PLACES=69, PETRI_TRANSITIONS=67} [2024-11-20 17:41:32,887 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 7 predicate places. [2024-11-20 17:41:32,887 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 67 transitions, 213 flow [2024-11-20 17:41:32,889 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 31.363636363636363) internal successors, (345), 11 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:41:32,889 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:41:32,889 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-20 17:41:32,899 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-20 17:41:33,093 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:41:33,094 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-20 17:41:33,094 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:41:33,094 INFO L85 PathProgramCache]: Analyzing trace with hash 110403512, now seen corresponding path program 1 times [2024-11-20 17:41:33,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:41:33,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171371089] [2024-11-20 17:41:33,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:41:33,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:41:33,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:41:33,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:41:33,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:41:33,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171371089] [2024-11-20 17:41:33,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171371089] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:41:33,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839754531] [2024-11-20 17:41:33,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:41:33,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:41:33,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:41:33,319 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:41:33,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-20 17:41:33,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:41:33,373 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-20 17:41:33,374 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:41:33,394 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-20 17:41:33,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:41:33,576 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:41:33,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:41:33,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839754531] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:41:33,811 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:41:33,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-20 17:41:33,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914656799] [2024-11-20 17:41:33,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:41:33,812 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-20 17:41:33,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:41:33,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-20 17:41:33,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-20 17:41:34,358 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 66 [2024-11-20 17:41:34,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 67 transitions, 213 flow. Second operand has 13 states, 13 states have (on average 31.307692307692307) internal successors, (407), 13 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:41:34,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:41:34,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 66 [2024-11-20 17:41:34,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:41:34,688 INFO L124 PetriNetUnfolderBase]: 236/561 cut-off events. [2024-11-20 17:41:34,689 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2024-11-20 17:41:34,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 981 conditions, 561 events. 236/561 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3046 event pairs, 138 based on Foata normal form. 0/377 useless extension candidates. Maximal degree in co-relation 935. Up to 354 conditions per place. [2024-11-20 17:41:34,697 INFO L140 encePairwiseOnDemand]: 58/66 looper letters, 26 selfloop transitions, 15 changer transitions 0/66 dead transitions. [2024-11-20 17:41:34,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 66 transitions, 291 flow [2024-11-20 17:41:34,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 17:41:34,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-20 17:41:34,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 249 transitions. [2024-11-20 17:41:34,699 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.538961038961039 [2024-11-20 17:41:34,699 INFO L175 Difference]: Start difference. First operand has 69 places, 67 transitions, 213 flow. Second operand 7 states and 249 transitions. [2024-11-20 17:41:34,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 66 transitions, 291 flow [2024-11-20 17:41:34,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 66 transitions, 244 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-11-20 17:41:34,704 INFO L231 Difference]: Finished difference. Result has 66 places, 66 transitions, 192 flow [2024-11-20 17:41:34,704 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=192, PETRI_PLACES=66, PETRI_TRANSITIONS=66} [2024-11-20 17:41:34,705 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 4 predicate places. [2024-11-20 17:41:34,705 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 66 transitions, 192 flow [2024-11-20 17:41:34,708 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 31.307692307692307) internal successors, (407), 13 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:41:34,709 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:41:34,709 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:41:34,717 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-20 17:41:34,913 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:41:34,914 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-20 17:41:34,914 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:41:34,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1179744335, now seen corresponding path program 1 times [2024-11-20 17:41:34,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:41:34,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168866902] [2024-11-20 17:41:34,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:41:34,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:41:34,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:41:34,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:41:34,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:41:34,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168866902] [2024-11-20 17:41:34,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168866902] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:41:34,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:41:34,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 17:41:34,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973068314] [2024-11-20 17:41:34,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:41:34,987 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:41:34,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:41:34,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:41:34,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 17:41:35,025 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 66 [2024-11-20 17:41:35,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 66 transitions, 192 flow. Second operand has 5 states, 5 states have (on average 32.4) internal successors, (162), 5 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:41:35,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:41:35,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 66 [2024-11-20 17:41:35,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:41:35,216 INFO L124 PetriNetUnfolderBase]: 436/1017 cut-off events. [2024-11-20 17:41:35,217 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-11-20 17:41:35,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1773 conditions, 1017 events. 436/1017 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 6237 event pairs, 234 based on Foata normal form. 0/690 useless extension candidates. Maximal degree in co-relation 1049. Up to 409 conditions per place. [2024-11-20 17:41:35,222 INFO L140 encePairwiseOnDemand]: 58/66 looper letters, 75 selfloop transitions, 7 changer transitions 0/106 dead transitions. [2024-11-20 17:41:35,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 106 transitions, 467 flow [2024-11-20 17:41:35,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 17:41:35,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-20 17:41:35,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 263 transitions. [2024-11-20 17:41:35,224 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6641414141414141 [2024-11-20 17:41:35,224 INFO L175 Difference]: Start difference. First operand has 66 places, 66 transitions, 192 flow. Second operand 6 states and 263 transitions. [2024-11-20 17:41:35,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 106 transitions, 467 flow [2024-11-20 17:41:35,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 106 transitions, 426 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-11-20 17:41:35,228 INFO L231 Difference]: Finished difference. Result has 69 places, 70 transitions, 210 flow [2024-11-20 17:41:35,228 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=210, PETRI_PLACES=69, PETRI_TRANSITIONS=70} [2024-11-20 17:41:35,229 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 7 predicate places. [2024-11-20 17:41:35,230 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 70 transitions, 210 flow [2024-11-20 17:41:35,231 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.4) internal successors, (162), 5 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:41:35,231 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:41:35,231 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:41:35,231 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-20 17:41:35,231 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-20 17:41:35,231 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:41:35,232 INFO L85 PathProgramCache]: Analyzing trace with hash 148683071, now seen corresponding path program 1 times [2024-11-20 17:41:35,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:41:35,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484470510] [2024-11-20 17:41:35,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:41:35,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:41:35,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:41:35,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:41:35,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:41:35,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484470510] [2024-11-20 17:41:35,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484470510] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:41:35,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:41:35,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 17:41:35,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171553005] [2024-11-20 17:41:35,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:41:35,304 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:41:35,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:41:35,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:41:35,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:41:35,343 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 66 [2024-11-20 17:41:35,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 70 transitions, 210 flow. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:41:35,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:41:35,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 66 [2024-11-20 17:41:35,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:41:35,521 INFO L124 PetriNetUnfolderBase]: 532/1174 cut-off events. [2024-11-20 17:41:35,521 INFO L125 PetriNetUnfolderBase]: For 153/153 co-relation queries the response was YES. [2024-11-20 17:41:35,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2210 conditions, 1174 events. 532/1174 cut-off events. For 153/153 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 6996 event pairs, 356 based on Foata normal form. 0/942 useless extension candidates. Maximal degree in co-relation 1320. Up to 832 conditions per place. [2024-11-20 17:41:35,530 INFO L140 encePairwiseOnDemand]: 60/66 looper letters, 44 selfloop transitions, 4 changer transitions 0/66 dead transitions. [2024-11-20 17:41:35,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 66 transitions, 298 flow [2024-11-20 17:41:35,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 17:41:35,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 17:41:35,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 131 transitions. [2024-11-20 17:41:35,531 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4962121212121212 [2024-11-20 17:41:35,531 INFO L175 Difference]: Start difference. First operand has 69 places, 70 transitions, 210 flow. Second operand 4 states and 131 transitions. [2024-11-20 17:41:35,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 66 transitions, 298 flow [2024-11-20 17:41:35,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 66 transitions, 293 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:41:35,536 INFO L231 Difference]: Finished difference. Result has 66 places, 66 transitions, 205 flow [2024-11-20 17:41:35,536 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=205, PETRI_PLACES=66, PETRI_TRANSITIONS=66} [2024-11-20 17:41:35,537 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 4 predicate places. [2024-11-20 17:41:35,537 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 66 transitions, 205 flow [2024-11-20 17:41:35,537 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:41:35,537 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:41:35,537 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:41:35,537 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-20 17:41:35,537 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-20 17:41:35,538 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:41:35,538 INFO L85 PathProgramCache]: Analyzing trace with hash 148683072, now seen corresponding path program 1 times [2024-11-20 17:41:35,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:41:35,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875011816] [2024-11-20 17:41:35,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:41:35,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:41:35,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:41:35,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:41:35,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:41:35,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875011816] [2024-11-20 17:41:35,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875011816] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:41:35,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:41:35,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 17:41:35,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086175226] [2024-11-20 17:41:35,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:41:35,610 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:41:35,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:41:35,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:41:35,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 17:41:35,638 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 66 [2024-11-20 17:41:35,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 66 transitions, 205 flow. Second operand has 5 states, 5 states have (on average 32.8) internal successors, (164), 5 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:41:35,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:41:35,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 66 [2024-11-20 17:41:35,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:41:35,820 INFO L124 PetriNetUnfolderBase]: 390/782 cut-off events. [2024-11-20 17:41:35,820 INFO L125 PetriNetUnfolderBase]: For 123/123 co-relation queries the response was YES. [2024-11-20 17:41:35,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1564 conditions, 782 events. 390/782 cut-off events. For 123/123 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3772 event pairs, 224 based on Foata normal form. 0/615 useless extension candidates. Maximal degree in co-relation 1073. Up to 407 conditions per place. [2024-11-20 17:41:35,826 INFO L140 encePairwiseOnDemand]: 58/66 looper letters, 68 selfloop transitions, 7 changer transitions 0/95 dead transitions. [2024-11-20 17:41:35,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 95 transitions, 436 flow [2024-11-20 17:41:35,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 17:41:35,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-20 17:41:35,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 256 transitions. [2024-11-20 17:41:35,827 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6464646464646465 [2024-11-20 17:41:35,827 INFO L175 Difference]: Start difference. First operand has 66 places, 66 transitions, 205 flow. Second operand 6 states and 256 transitions. [2024-11-20 17:41:35,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 95 transitions, 436 flow [2024-11-20 17:41:35,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 95 transitions, 430 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:41:35,830 INFO L231 Difference]: Finished difference. Result has 71 places, 68 transitions, 230 flow [2024-11-20 17:41:35,831 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=230, PETRI_PLACES=71, PETRI_TRANSITIONS=68} [2024-11-20 17:41:35,831 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 9 predicate places. [2024-11-20 17:41:35,831 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 68 transitions, 230 flow [2024-11-20 17:41:35,832 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.8) internal successors, (164), 5 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:41:35,832 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:41:35,832 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:41:35,832 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-20 17:41:35,832 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-20 17:41:35,832 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:41:35,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1430032755, now seen corresponding path program 1 times [2024-11-20 17:41:35,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:41:35,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295534110] [2024-11-20 17:41:35,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:41:35,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:41:35,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:41:35,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:41:35,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:41:35,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295534110] [2024-11-20 17:41:35,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295534110] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:41:35,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:41:35,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-20 17:41:35,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862414845] [2024-11-20 17:41:35,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:41:35,896 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:41:35,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:41:35,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:41:35,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 17:41:35,926 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 66 [2024-11-20 17:41:35,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 68 transitions, 230 flow. Second operand has 5 states, 5 states have (on average 32.8) internal successors, (164), 5 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:41:35,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:41:35,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 66 [2024-11-20 17:41:35,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:41:36,164 INFO L124 PetriNetUnfolderBase]: 688/1466 cut-off events. [2024-11-20 17:41:36,164 INFO L125 PetriNetUnfolderBase]: For 327/327 co-relation queries the response was YES. [2024-11-20 17:41:36,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3053 conditions, 1466 events. 688/1466 cut-off events. For 327/327 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 8753 event pairs, 398 based on Foata normal form. 16/1250 useless extension candidates. Maximal degree in co-relation 2077. Up to 630 conditions per place. [2024-11-20 17:41:36,173 INFO L140 encePairwiseOnDemand]: 60/66 looper letters, 77 selfloop transitions, 11 changer transitions 0/108 dead transitions. [2024-11-20 17:41:36,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 108 transitions, 527 flow [2024-11-20 17:41:36,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:41:36,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:41:36,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 226 transitions. [2024-11-20 17:41:36,174 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6848484848484848 [2024-11-20 17:41:36,174 INFO L175 Difference]: Start difference. First operand has 71 places, 68 transitions, 230 flow. Second operand 5 states and 226 transitions. [2024-11-20 17:41:36,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 108 transitions, 527 flow [2024-11-20 17:41:36,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 108 transitions, 519 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-20 17:41:36,177 INFO L231 Difference]: Finished difference. Result has 74 places, 72 transitions, 284 flow [2024-11-20 17:41:36,178 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=284, PETRI_PLACES=74, PETRI_TRANSITIONS=72} [2024-11-20 17:41:36,178 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 12 predicate places. [2024-11-20 17:41:36,178 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 72 transitions, 284 flow [2024-11-20 17:41:36,179 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.8) internal successors, (164), 5 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:41:36,179 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:41:36,179 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:41:36,179 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-20 17:41:36,179 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-20 17:41:36,179 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:41:36,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1839389634, now seen corresponding path program 1 times [2024-11-20 17:41:36,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:41:36,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941365173] [2024-11-20 17:41:36,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:41:36,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:41:36,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:41:36,263 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:41:36,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:41:36,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941365173] [2024-11-20 17:41:36,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941365173] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:41:36,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:41:36,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 17:41:36,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295637238] [2024-11-20 17:41:36,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:41:36,264 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:41:36,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:41:36,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:41:36,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 17:41:36,326 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 66 [2024-11-20 17:41:36,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 72 transitions, 284 flow. Second operand has 5 states, 5 states have (on average 25.2) internal successors, (126), 5 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:41:36,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:41:36,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 66 [2024-11-20 17:41:36,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:41:36,500 INFO L124 PetriNetUnfolderBase]: 766/1532 cut-off events. [2024-11-20 17:41:36,500 INFO L125 PetriNetUnfolderBase]: For 835/835 co-relation queries the response was YES. [2024-11-20 17:41:36,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3464 conditions, 1532 events. 766/1532 cut-off events. For 835/835 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 8561 event pairs, 540 based on Foata normal form. 0/1402 useless extension candidates. Maximal degree in co-relation 2237. Up to 1240 conditions per place. [2024-11-20 17:41:36,512 INFO L140 encePairwiseOnDemand]: 59/66 looper letters, 47 selfloop transitions, 7 changer transitions 0/68 dead transitions. [2024-11-20 17:41:36,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 68 transitions, 384 flow [2024-11-20 17:41:36,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:41:36,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:41:36,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 154 transitions. [2024-11-20 17:41:36,513 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-11-20 17:41:36,514 INFO L175 Difference]: Start difference. First operand has 74 places, 72 transitions, 284 flow. Second operand 5 states and 154 transitions. [2024-11-20 17:41:36,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 68 transitions, 384 flow [2024-11-20 17:41:36,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 68 transitions, 379 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 17:41:36,517 INFO L231 Difference]: Finished difference. Result has 73 places, 68 transitions, 285 flow [2024-11-20 17:41:36,518 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=285, PETRI_PLACES=73, PETRI_TRANSITIONS=68} [2024-11-20 17:41:36,519 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 11 predicate places. [2024-11-20 17:41:36,519 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 68 transitions, 285 flow [2024-11-20 17:41:36,519 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.2) internal successors, (126), 5 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:41:36,519 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:41:36,519 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:41:36,519 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-20 17:41:36,520 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-20 17:41:36,520 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:41:36,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1839389635, now seen corresponding path program 1 times [2024-11-20 17:41:36,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:41:36,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617460481] [2024-11-20 17:41:36,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:41:36,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:41:36,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:41:36,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:41:36,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:41:36,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617460481] [2024-11-20 17:41:36,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617460481] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:41:36,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174271441] [2024-11-20 17:41:36,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:41:36,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:41:36,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:41:36,755 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:41:36,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-20 17:41:36,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:41:36,821 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-20 17:41:36,823 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:41:36,829 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-20 17:41:36,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 17:41:36,879 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-20 17:41:36,896 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 17:41:36,896 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-20 17:41:36,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:41:36,953 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:41:37,064 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2024-11-20 17:41:37,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:41:37,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174271441] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:41:37,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:41:37,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-20 17:41:37,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964191558] [2024-11-20 17:41:37,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:41:37,143 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-20 17:41:37,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:41:37,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-20 17:41:37,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-20 17:41:37,832 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 66 [2024-11-20 17:41:37,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 68 transitions, 285 flow. Second operand has 13 states, 13 states have (on average 28.153846153846153) internal successors, (366), 13 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:41:37,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:41:37,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 66 [2024-11-20 17:41:37,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:41:38,443 INFO L124 PetriNetUnfolderBase]: 936/1764 cut-off events. [2024-11-20 17:41:38,444 INFO L125 PetriNetUnfolderBase]: For 846/846 co-relation queries the response was YES. [2024-11-20 17:41:38,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4055 conditions, 1764 events. 936/1764 cut-off events. For 846/846 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 9345 event pairs, 413 based on Foata normal form. 0/1576 useless extension candidates. Maximal degree in co-relation 2815. Up to 561 conditions per place. [2024-11-20 17:41:38,455 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 87 selfloop transitions, 18 changer transitions 0/118 dead transitions. [2024-11-20 17:41:38,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 118 transitions, 628 flow [2024-11-20 17:41:38,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 17:41:38,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-20 17:41:38,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 335 transitions. [2024-11-20 17:41:38,458 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.563973063973064 [2024-11-20 17:41:38,458 INFO L175 Difference]: Start difference. First operand has 73 places, 68 transitions, 285 flow. Second operand 9 states and 335 transitions. [2024-11-20 17:41:38,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 118 transitions, 628 flow [2024-11-20 17:41:38,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 118 transitions, 616 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-20 17:41:38,463 INFO L231 Difference]: Finished difference. Result has 79 places, 72 transitions, 351 flow [2024-11-20 17:41:38,463 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=351, PETRI_PLACES=79, PETRI_TRANSITIONS=72} [2024-11-20 17:41:38,464 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 17 predicate places. [2024-11-20 17:41:38,464 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 72 transitions, 351 flow [2024-11-20 17:41:38,464 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 28.153846153846153) internal successors, (366), 13 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:41:38,464 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:41:38,464 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:41:38,473 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-20 17:41:38,665 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:41:38,665 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-20 17:41:38,666 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:41:38,666 INFO L85 PathProgramCache]: Analyzing trace with hash 139680028, now seen corresponding path program 1 times [2024-11-20 17:41:38,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:41:38,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869687321] [2024-11-20 17:41:38,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:41:38,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:41:38,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:41:38,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:41:38,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:41:38,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869687321] [2024-11-20 17:41:38,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869687321] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:41:38,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:41:38,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-20 17:41:38,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095853621] [2024-11-20 17:41:38,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:41:38,759 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:41:38,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:41:38,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:41:38,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 17:41:38,807 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 66 [2024-11-20 17:41:38,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 72 transitions, 351 flow. Second operand has 5 states, 5 states have (on average 33.2) internal successors, (166), 5 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:41:38,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:41:38,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 66 [2024-11-20 17:41:38,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:41:39,021 INFO L124 PetriNetUnfolderBase]: 798/1569 cut-off events. [2024-11-20 17:41:39,021 INFO L125 PetriNetUnfolderBase]: For 1635/1637 co-relation queries the response was YES. [2024-11-20 17:41:39,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3872 conditions, 1569 events. 798/1569 cut-off events. For 1635/1637 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 8328 event pairs, 486 based on Foata normal form. 13/1434 useless extension candidates. Maximal degree in co-relation 2680. Up to 856 conditions per place. [2024-11-20 17:41:39,031 INFO L140 encePairwiseOnDemand]: 60/66 looper letters, 74 selfloop transitions, 11 changer transitions 0/101 dead transitions. [2024-11-20 17:41:39,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 101 transitions, 632 flow [2024-11-20 17:41:39,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:41:39,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:41:39,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 219 transitions. [2024-11-20 17:41:39,032 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6636363636363637 [2024-11-20 17:41:39,032 INFO L175 Difference]: Start difference. First operand has 79 places, 72 transitions, 351 flow. Second operand 5 states and 219 transitions. [2024-11-20 17:41:39,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 101 transitions, 632 flow [2024-11-20 17:41:39,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 101 transitions, 593 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-11-20 17:41:39,037 INFO L231 Difference]: Finished difference. Result has 80 places, 76 transitions, 378 flow [2024-11-20 17:41:39,037 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=378, PETRI_PLACES=80, PETRI_TRANSITIONS=76} [2024-11-20 17:41:39,038 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 18 predicate places. [2024-11-20 17:41:39,038 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 76 transitions, 378 flow [2024-11-20 17:41:39,038 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.2) internal successors, (166), 5 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:41:39,038 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:41:39,039 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:41:39,039 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-20 17:41:39,039 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-20 17:41:39,039 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:41:39,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1186504380, now seen corresponding path program 1 times [2024-11-20 17:41:39,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:41:39,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341453035] [2024-11-20 17:41:39,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:41:39,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:41:39,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:41:39,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:41:39,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:41:39,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341453035] [2024-11-20 17:41:39,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341453035] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:41:39,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821300278] [2024-11-20 17:41:39,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:41:39,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:41:39,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:41:39,203 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:41:39,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-20 17:41:39,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:41:39,272 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-20 17:41:39,273 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:41:39,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:41:39,354 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:41:39,402 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-20 17:41:39,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:41:39,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821300278] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:41:39,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:41:39,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-11-20 17:41:39,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310981960] [2024-11-20 17:41:39,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:41:39,413 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-20 17:41:39,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:41:39,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-20 17:41:39,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-20 17:41:39,703 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 66 [2024-11-20 17:41:39,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 76 transitions, 378 flow. Second operand has 11 states, 11 states have (on average 30.90909090909091) internal successors, (340), 11 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:41:39,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:41:39,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 66 [2024-11-20 17:41:39,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:41:40,189 INFO L124 PetriNetUnfolderBase]: 837/1552 cut-off events. [2024-11-20 17:41:40,189 INFO L125 PetriNetUnfolderBase]: For 1522/1522 co-relation queries the response was YES. [2024-11-20 17:41:40,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4020 conditions, 1552 events. 837/1552 cut-off events. For 1522/1522 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 7804 event pairs, 402 based on Foata normal form. 0/1457 useless extension candidates. Maximal degree in co-relation 2851. Up to 521 conditions per place. [2024-11-20 17:41:40,201 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 88 selfloop transitions, 18 changer transitions 0/120 dead transitions. [2024-11-20 17:41:40,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 120 transitions, 712 flow [2024-11-20 17:41:40,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 17:41:40,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-20 17:41:40,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 296 transitions. [2024-11-20 17:41:40,204 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6406926406926406 [2024-11-20 17:41:40,204 INFO L175 Difference]: Start difference. First operand has 80 places, 76 transitions, 378 flow. Second operand 7 states and 296 transitions. [2024-11-20 17:41:40,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 120 transitions, 712 flow [2024-11-20 17:41:40,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 120 transitions, 700 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:41:40,214 INFO L231 Difference]: Finished difference. Result has 85 places, 76 transitions, 421 flow [2024-11-20 17:41:40,214 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=421, PETRI_PLACES=85, PETRI_TRANSITIONS=76} [2024-11-20 17:41:40,215 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 23 predicate places. [2024-11-20 17:41:40,215 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 76 transitions, 421 flow [2024-11-20 17:41:40,215 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 30.90909090909091) internal successors, (340), 11 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:41:40,215 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:41:40,216 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:41:40,226 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-20 17:41:40,416 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:41:40,416 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-20 17:41:40,417 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:41:40,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1861464815, now seen corresponding path program 1 times [2024-11-20 17:41:40,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:41:40,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112918116] [2024-11-20 17:41:40,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:41:40,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:41:40,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:41:40,638 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:41:40,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:41:40,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112918116] [2024-11-20 17:41:40,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112918116] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:41:40,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480680410] [2024-11-20 17:41:40,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:41:40,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:41:40,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:41:40,642 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:41:40,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-20 17:41:40,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:41:40,711 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-20 17:41:40,713 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:41:40,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:41:40,802 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:41:40,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-20 17:41:40,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:41:40,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480680410] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:41:40,861 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:41:40,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-11-20 17:41:40,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709839841] [2024-11-20 17:41:40,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:41:40,862 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-20 17:41:40,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:41:40,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-20 17:41:40,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-20 17:41:41,246 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 66 [2024-11-20 17:41:41,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 76 transitions, 421 flow. Second operand has 11 states, 11 states have (on average 30.272727272727273) internal successors, (333), 11 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:41:41,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:41:41,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 66 [2024-11-20 17:41:41,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:41:41,692 INFO L124 PetriNetUnfolderBase]: 1180/2133 cut-off events. [2024-11-20 17:41:41,692 INFO L125 PetriNetUnfolderBase]: For 3826/3886 co-relation queries the response was YES. [2024-11-20 17:41:41,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5829 conditions, 2133 events. 1180/2133 cut-off events. For 3826/3886 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 11102 event pairs, 488 based on Foata normal form. 0/1997 useless extension candidates. Maximal degree in co-relation 3768. Up to 736 conditions per place. [2024-11-20 17:41:41,714 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 97 selfloop transitions, 18 changer transitions 0/128 dead transitions. [2024-11-20 17:41:41,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 128 transitions, 883 flow [2024-11-20 17:41:41,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 17:41:41,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-20 17:41:41,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 289 transitions. [2024-11-20 17:41:41,715 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6255411255411255 [2024-11-20 17:41:41,715 INFO L175 Difference]: Start difference. First operand has 85 places, 76 transitions, 421 flow. Second operand 7 states and 289 transitions. [2024-11-20 17:41:41,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 128 transitions, 883 flow [2024-11-20 17:41:41,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 128 transitions, 842 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-11-20 17:41:41,722 INFO L231 Difference]: Finished difference. Result has 87 places, 79 transitions, 461 flow [2024-11-20 17:41:41,722 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=461, PETRI_PLACES=87, PETRI_TRANSITIONS=79} [2024-11-20 17:41:41,723 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 25 predicate places. [2024-11-20 17:41:41,723 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 79 transitions, 461 flow [2024-11-20 17:41:41,723 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 30.272727272727273) internal successors, (333), 11 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:41:41,723 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:41:41,723 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:41:41,732 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-20 17:41:41,924 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-20 17:41:41,925 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-20 17:41:41,925 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:41:41,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1870833853, now seen corresponding path program 1 times [2024-11-20 17:41:41,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:41:41,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332096054] [2024-11-20 17:41:41,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:41:41,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:41:41,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:41:42,102 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:41:42,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:41:42,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332096054] [2024-11-20 17:41:42,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332096054] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:41:42,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001579866] [2024-11-20 17:41:42,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:41:42,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:41:42,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:41:42,105 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:41:42,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-20 17:41:42,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:41:42,175 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-20 17:41:42,176 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:41:42,182 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-20 17:41:42,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 17:41:42,224 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-20 17:41:42,231 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 17:41:42,232 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-20 17:41:42,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:41:42,292 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:41:42,395 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2024-11-20 17:41:42,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:41:42,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001579866] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:41:42,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:41:42,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-20 17:41:42,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581275906] [2024-11-20 17:41:42,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:41:42,460 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-20 17:41:42,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:41:42,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-20 17:41:42,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-20 17:41:46,472 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-20 17:41:50,524 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-20 17:41:51,175 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 66 [2024-11-20 17:41:51,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 79 transitions, 461 flow. Second operand has 13 states, 13 states have (on average 29.46153846153846) internal successors, (383), 13 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:41:51,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:41:51,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 66 [2024-11-20 17:41:51,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:41:51,791 INFO L124 PetriNetUnfolderBase]: 1096/1978 cut-off events. [2024-11-20 17:41:51,791 INFO L125 PetriNetUnfolderBase]: For 3655/3703 co-relation queries the response was YES. [2024-11-20 17:41:51,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5727 conditions, 1978 events. 1096/1978 cut-off events. For 3655/3703 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 10000 event pairs, 488 based on Foata normal form. 0/1934 useless extension candidates. Maximal degree in co-relation 3653. Up to 736 conditions per place. [2024-11-20 17:41:51,807 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 98 selfloop transitions, 18 changer transitions 0/130 dead transitions. [2024-11-20 17:41:51,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 130 transitions, 911 flow [2024-11-20 17:41:51,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 17:41:51,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-20 17:41:51,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 340 transitions. [2024-11-20 17:41:51,809 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5723905723905723 [2024-11-20 17:41:51,809 INFO L175 Difference]: Start difference. First operand has 87 places, 79 transitions, 461 flow. Second operand 9 states and 340 transitions. [2024-11-20 17:41:51,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 130 transitions, 911 flow [2024-11-20 17:41:51,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 130 transitions, 879 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-11-20 17:41:51,816 INFO L231 Difference]: Finished difference. Result has 92 places, 79 transitions, 484 flow [2024-11-20 17:41:51,817 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=427, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=484, PETRI_PLACES=92, PETRI_TRANSITIONS=79} [2024-11-20 17:41:51,818 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 30 predicate places. [2024-11-20 17:41:51,818 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 79 transitions, 484 flow [2024-11-20 17:41:51,818 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 29.46153846153846) internal successors, (383), 13 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:41:51,818 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:41:51,818 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:41:51,826 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-20 17:41:52,019 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-20 17:41:52,019 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-20 17:41:52,020 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:41:52,020 INFO L85 PathProgramCache]: Analyzing trace with hash -428318647, now seen corresponding path program 1 times [2024-11-20 17:41:52,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:41:52,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411986838] [2024-11-20 17:41:52,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:41:52,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:41:52,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:41:52,139 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:41:52,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:41:52,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411986838] [2024-11-20 17:41:52,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411986838] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:41:52,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222434845] [2024-11-20 17:41:52,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:41:52,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:41:52,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:41:52,142 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:41:52,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-20 17:41:52,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:41:52,215 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-20 17:41:52,216 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:41:52,294 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:41:52,297 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:41:52,385 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:41:52,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222434845] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:41:52,385 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:41:52,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2024-11-20 17:41:52,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034275048] [2024-11-20 17:41:52,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:41:52,386 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-20 17:41:52,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:41:52,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-20 17:41:52,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-11-20 17:41:52,670 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 66 [2024-11-20 17:41:52,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 79 transitions, 484 flow. Second operand has 16 states, 16 states have (on average 33.125) internal successors, (530), 16 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:41:52,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:41:52,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 66 [2024-11-20 17:41:52,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:41:53,674 INFO L124 PetriNetUnfolderBase]: 2792/5128 cut-off events. [2024-11-20 17:41:53,674 INFO L125 PetriNetUnfolderBase]: For 11852/11963 co-relation queries the response was YES. [2024-11-20 17:41:53,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15516 conditions, 5128 events. 2792/5128 cut-off events. For 11852/11963 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 33079 event pairs, 1093 based on Foata normal form. 72/5122 useless extension candidates. Maximal degree in co-relation 8028. Up to 1002 conditions per place. [2024-11-20 17:41:53,700 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 231 selfloop transitions, 48 changer transitions 0/295 dead transitions. [2024-11-20 17:41:53,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 295 transitions, 2281 flow [2024-11-20 17:41:53,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-20 17:41:53,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-11-20 17:41:53,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 931 transitions. [2024-11-20 17:41:53,703 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6133069828722003 [2024-11-20 17:41:53,703 INFO L175 Difference]: Start difference. First operand has 92 places, 79 transitions, 484 flow. Second operand 23 states and 931 transitions. [2024-11-20 17:41:53,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 295 transitions, 2281 flow [2024-11-20 17:41:53,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 295 transitions, 2192 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-11-20 17:41:53,723 INFO L231 Difference]: Finished difference. Result has 113 places, 107 transitions, 843 flow [2024-11-20 17:41:53,724 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=453, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=843, PETRI_PLACES=113, PETRI_TRANSITIONS=107} [2024-11-20 17:41:53,724 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 51 predicate places. [2024-11-20 17:41:53,724 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 107 transitions, 843 flow [2024-11-20 17:41:53,725 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 33.125) internal successors, (530), 16 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:41:53,725 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:41:53,725 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:41:53,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-20 17:41:53,925 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:41:53,925 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-20 17:41:53,926 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:41:53,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1294948663, now seen corresponding path program 1 times [2024-11-20 17:41:53,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:41:53,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881475334] [2024-11-20 17:41:53,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:41:53,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:41:53,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:41:54,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:41:54,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:41:54,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881475334] [2024-11-20 17:41:54,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881475334] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:41:54,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:41:54,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 17:41:54,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768129794] [2024-11-20 17:41:54,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:41:54,073 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:41:54,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:41:54,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:41:54,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:41:54,074 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-20 17:41:54,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 107 transitions, 843 flow. Second operand has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 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) [2024-11-20 17:41:54,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:41:54,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-20 17:41:54,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:41:54,550 INFO L124 PetriNetUnfolderBase]: 3045/5859 cut-off events. [2024-11-20 17:41:54,551 INFO L125 PetriNetUnfolderBase]: For 15824/16010 co-relation queries the response was YES. [2024-11-20 17:41:54,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17784 conditions, 5859 events. 3045/5859 cut-off events. For 15824/16010 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 42099 event pairs, 1702 based on Foata normal form. 54/5759 useless extension candidates. Maximal degree in co-relation 12853. Up to 3869 conditions per place. [2024-11-20 17:41:54,591 INFO L140 encePairwiseOnDemand]: 62/66 looper letters, 106 selfloop transitions, 1 changer transitions 9/133 dead transitions. [2024-11-20 17:41:54,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 133 transitions, 1192 flow [2024-11-20 17:41:54,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 17:41:54,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 17:41:54,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 182 transitions. [2024-11-20 17:41:54,593 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6893939393939394 [2024-11-20 17:41:54,593 INFO L175 Difference]: Start difference. First operand has 113 places, 107 transitions, 843 flow. Second operand 4 states and 182 transitions. [2024-11-20 17:41:54,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 133 transitions, 1192 flow [2024-11-20 17:41:54,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 133 transitions, 1155 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-11-20 17:41:54,623 INFO L231 Difference]: Finished difference. Result has 112 places, 107 transitions, 821 flow [2024-11-20 17:41:54,624 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=806, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=821, PETRI_PLACES=112, PETRI_TRANSITIONS=107} [2024-11-20 17:41:54,625 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 50 predicate places. [2024-11-20 17:41:54,625 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 107 transitions, 821 flow [2024-11-20 17:41:54,625 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 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) [2024-11-20 17:41:54,625 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:41:54,626 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:41:54,626 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-20 17:41:54,626 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-20 17:41:54,627 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:41:54,627 INFO L85 PathProgramCache]: Analyzing trace with hash 725935119, now seen corresponding path program 2 times [2024-11-20 17:41:54,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:41:54,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865012372] [2024-11-20 17:41:54,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:41:54,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:41:54,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:41:54,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:41:54,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:41:54,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865012372] [2024-11-20 17:41:54,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865012372] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:41:54,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:41:54,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 17:41:54,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472615959] [2024-11-20 17:41:54,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:41:54,754 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:41:54,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:41:54,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:41:54,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:41:54,755 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-20 17:41:54,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 107 transitions, 821 flow. Second operand has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 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) [2024-11-20 17:41:54,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:41:54,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-20 17:41:54,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:41:55,333 INFO L124 PetriNetUnfolderBase]: 3285/6382 cut-off events. [2024-11-20 17:41:55,333 INFO L125 PetriNetUnfolderBase]: For 17855/18110 co-relation queries the response was YES. [2024-11-20 17:41:55,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19389 conditions, 6382 events. 3285/6382 cut-off events. For 17855/18110 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 47223 event pairs, 2166 based on Foata normal form. 45/6173 useless extension candidates. Maximal degree in co-relation 19257. Up to 4692 conditions per place. [2024-11-20 17:41:55,372 INFO L140 encePairwiseOnDemand]: 62/66 looper letters, 117 selfloop transitions, 1 changer transitions 7/142 dead transitions. [2024-11-20 17:41:55,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 142 transitions, 1328 flow [2024-11-20 17:41:55,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 17:41:55,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 17:41:55,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 180 transitions. [2024-11-20 17:41:55,374 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6818181818181818 [2024-11-20 17:41:55,374 INFO L175 Difference]: Start difference. First operand has 112 places, 107 transitions, 821 flow. Second operand 4 states and 180 transitions. [2024-11-20 17:41:55,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 142 transitions, 1328 flow [2024-11-20 17:41:55,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 142 transitions, 1322 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-11-20 17:41:55,417 INFO L231 Difference]: Finished difference. Result has 114 places, 107 transitions, 843 flow [2024-11-20 17:41:55,417 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=818, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=843, PETRI_PLACES=114, PETRI_TRANSITIONS=107} [2024-11-20 17:41:55,417 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 52 predicate places. [2024-11-20 17:41:55,417 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 107 transitions, 843 flow [2024-11-20 17:41:55,418 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 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) [2024-11-20 17:41:55,418 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:41:55,418 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:41:55,418 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-20 17:41:55,418 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-20 17:41:55,418 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:41:55,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1779849144, now seen corresponding path program 1 times [2024-11-20 17:41:55,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:41:55,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994009692] [2024-11-20 17:41:55,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:41:55,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:41:55,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:41:55,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:41:55,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:41:55,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994009692] [2024-11-20 17:41:55,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994009692] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:41:55,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099414850] [2024-11-20 17:41:55,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:41:55,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:41:55,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:41:55,514 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:41:55,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-20 17:41:55,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:41:55,590 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-20 17:41:55,591 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:41:55,664 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:41:55,664 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:41:55,744 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:41:55,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099414850] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:41:55,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:41:55,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 16 [2024-11-20 17:41:55,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034270354] [2024-11-20 17:41:55,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:41:55,747 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-20 17:41:55,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:41:55,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-20 17:41:55,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-11-20 17:41:55,947 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 66 [2024-11-20 17:41:55,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 107 transitions, 843 flow. Second operand has 16 states, 16 states have (on average 33.375) internal successors, (534), 16 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:41:55,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:41:55,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 66 [2024-11-20 17:41:55,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:41:56,871 INFO L124 PetriNetUnfolderBase]: 3043/5753 cut-off events. [2024-11-20 17:41:56,871 INFO L125 PetriNetUnfolderBase]: For 18205/18454 co-relation queries the response was YES. [2024-11-20 17:41:56,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18248 conditions, 5753 events. 3043/5753 cut-off events. For 18205/18454 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 39881 event pairs, 1735 based on Foata normal form. 72/5740 useless extension candidates. Maximal degree in co-relation 18115. Up to 1247 conditions per place. [2024-11-20 17:41:56,903 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 209 selfloop transitions, 46 changer transitions 0/271 dead transitions. [2024-11-20 17:41:56,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 271 transitions, 2279 flow [2024-11-20 17:41:56,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-20 17:41:56,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-20 17:41:56,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 860 transitions. [2024-11-20 17:41:56,906 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6204906204906205 [2024-11-20 17:41:56,906 INFO L175 Difference]: Start difference. First operand has 114 places, 107 transitions, 843 flow. Second operand 21 states and 860 transitions. [2024-11-20 17:41:56,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 271 transitions, 2279 flow [2024-11-20 17:41:56,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 271 transitions, 2267 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-11-20 17:41:56,942 INFO L231 Difference]: Finished difference. Result has 134 places, 125 transitions, 1138 flow [2024-11-20 17:41:56,942 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=840, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1138, PETRI_PLACES=134, PETRI_TRANSITIONS=125} [2024-11-20 17:41:56,943 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 72 predicate places. [2024-11-20 17:41:56,943 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 125 transitions, 1138 flow [2024-11-20 17:41:56,944 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 33.375) internal successors, (534), 16 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:41:56,944 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:41:56,944 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:41:56,954 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-20 17:41:57,144 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:41:57,145 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-20 17:41:57,145 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:41:57,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1069275252, now seen corresponding path program 1 times [2024-11-20 17:41:57,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:41:57,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068445369] [2024-11-20 17:41:57,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:41:57,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:41:57,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:41:57,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:41:57,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:41:57,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068445369] [2024-11-20 17:41:57,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068445369] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:41:57,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:41:57,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 17:41:57,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075927150] [2024-11-20 17:41:57,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:41:57,240 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:41:57,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:41:57,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:41:57,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:41:57,241 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-20 17:41:57,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 125 transitions, 1138 flow. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:41:57,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:41:57,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-20 17:41:57,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:41:57,643 INFO L124 PetriNetUnfolderBase]: 2161/4301 cut-off events. [2024-11-20 17:41:57,643 INFO L125 PetriNetUnfolderBase]: For 17968/18148 co-relation queries the response was YES. [2024-11-20 17:41:57,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14644 conditions, 4301 events. 2161/4301 cut-off events. For 17968/18148 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 29335 event pairs, 818 based on Foata normal form. 209/4448 useless extension candidates. Maximal degree in co-relation 10716. Up to 3107 conditions per place. [2024-11-20 17:41:57,661 INFO L140 encePairwiseOnDemand]: 62/66 looper letters, 111 selfloop transitions, 18 changer transitions 5/151 dead transitions. [2024-11-20 17:41:57,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 151 transitions, 1664 flow [2024-11-20 17:41:57,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:41:57,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:41:57,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 140 transitions. [2024-11-20 17:41:57,662 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7070707070707071 [2024-11-20 17:41:57,662 INFO L175 Difference]: Start difference. First operand has 134 places, 125 transitions, 1138 flow. Second operand 3 states and 140 transitions. [2024-11-20 17:41:57,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 151 transitions, 1664 flow [2024-11-20 17:41:57,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 151 transitions, 1623 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-11-20 17:41:57,687 INFO L231 Difference]: Finished difference. Result has 131 places, 141 transitions, 1415 flow [2024-11-20 17:41:57,687 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1097, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1415, PETRI_PLACES=131, PETRI_TRANSITIONS=141} [2024-11-20 17:41:57,687 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 69 predicate places. [2024-11-20 17:41:57,688 INFO L471 AbstractCegarLoop]: Abstraction has has 131 places, 141 transitions, 1415 flow [2024-11-20 17:41:57,688 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:41:57,688 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:41:57,688 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:41:57,688 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-20 17:41:57,688 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-20 17:41:57,689 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:41:57,689 INFO L85 PathProgramCache]: Analyzing trace with hash -701278822, now seen corresponding path program 2 times [2024-11-20 17:41:57,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:41:57,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201661931] [2024-11-20 17:41:57,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:41:57,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:41:57,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:41:57,902 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 17:41:57,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:41:57,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201661931] [2024-11-20 17:41:57,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201661931] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:41:57,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768783086] [2024-11-20 17:41:57,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 17:41:57,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:41:57,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:41:57,905 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:41:57,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-20 17:41:57,983 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 17:41:57,983 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:41:57,985 INFO L255 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-20 17:41:57,987 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:41:57,998 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-20 17:41:58,060 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 17:41:58,061 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-20 17:41:58,117 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-20 17:41:58,237 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 17:41:58,237 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:41:58,388 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2024-11-20 17:41:58,510 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 17:41:58,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768783086] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:41:58,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:41:58,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 19 [2024-11-20 17:41:58,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729079779] [2024-11-20 17:41:58,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:41:58,511 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-20 17:41:58,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:41:58,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-20 17:41:58,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2024-11-20 17:41:59,649 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 66 [2024-11-20 17:41:59,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 141 transitions, 1415 flow. Second operand has 21 states, 21 states have (on average 28.142857142857142) internal successors, (591), 21 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:41:59,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:41:59,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 66 [2024-11-20 17:41:59,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:42:00,887 INFO L124 PetriNetUnfolderBase]: 2719/5083 cut-off events. [2024-11-20 17:42:00,887 INFO L125 PetriNetUnfolderBase]: For 23508/23679 co-relation queries the response was YES. [2024-11-20 17:42:00,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17925 conditions, 5083 events. 2719/5083 cut-off events. For 23508/23679 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 32837 event pairs, 1162 based on Foata normal form. 24/5067 useless extension candidates. Maximal degree in co-relation 13672. Up to 1675 conditions per place. [2024-11-20 17:42:00,911 INFO L140 encePairwiseOnDemand]: 56/66 looper letters, 188 selfloop transitions, 42 changer transitions 0/243 dead transitions. [2024-11-20 17:42:00,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 243 transitions, 2514 flow [2024-11-20 17:42:00,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-20 17:42:00,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-20 17:42:00,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 478 transitions. [2024-11-20 17:42:00,913 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5571095571095571 [2024-11-20 17:42:00,913 INFO L175 Difference]: Start difference. First operand has 131 places, 141 transitions, 1415 flow. Second operand 13 states and 478 transitions. [2024-11-20 17:42:00,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 243 transitions, 2514 flow [2024-11-20 17:42:00,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 243 transitions, 2426 flow, removed 44 selfloop flow, removed 2 redundant places. [2024-11-20 17:42:00,940 INFO L231 Difference]: Finished difference. Result has 143 places, 149 transitions, 1564 flow [2024-11-20 17:42:00,940 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1343, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1564, PETRI_PLACES=143, PETRI_TRANSITIONS=149} [2024-11-20 17:42:00,940 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 81 predicate places. [2024-11-20 17:42:00,940 INFO L471 AbstractCegarLoop]: Abstraction has has 143 places, 149 transitions, 1564 flow [2024-11-20 17:42:00,941 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 28.142857142857142) internal successors, (591), 21 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:42:00,941 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:42:00,941 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:42:00,950 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-20 17:42:01,145 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:42:01,146 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-20 17:42:01,146 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:42:01,146 INFO L85 PathProgramCache]: Analyzing trace with hash -2029823056, now seen corresponding path program 1 times [2024-11-20 17:42:01,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:42:01,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136257348] [2024-11-20 17:42:01,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:42:01,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:42:01,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:42:01,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:42:01,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:42:01,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136257348] [2024-11-20 17:42:01,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136257348] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:42:01,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:42:01,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-20 17:42:01,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681870047] [2024-11-20 17:42:01,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:42:01,426 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-20 17:42:01,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:42:01,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-20 17:42:01,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-20 17:42:01,464 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-20 17:42:01,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 149 transitions, 1564 flow. Second operand has 8 states, 8 states have (on average 34.5) internal successors, (276), 8 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:42:01,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:42:01,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-20 17:42:01,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:42:02,011 INFO L124 PetriNetUnfolderBase]: 2421/4551 cut-off events. [2024-11-20 17:42:02,012 INFO L125 PetriNetUnfolderBase]: For 27025/27241 co-relation queries the response was YES. [2024-11-20 17:42:02,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17327 conditions, 4551 events. 2421/4551 cut-off events. For 27025/27241 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 29943 event pairs, 829 based on Foata normal form. 1/4472 useless extension candidates. Maximal degree in co-relation 13803. Up to 2233 conditions per place. [2024-11-20 17:42:02,037 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 155 selfloop transitions, 31 changer transitions 27/232 dead transitions. [2024-11-20 17:42:02,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 232 transitions, 2761 flow [2024-11-20 17:42:02,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 17:42:02,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-20 17:42:02,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 302 transitions. [2024-11-20 17:42:02,039 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6536796536796536 [2024-11-20 17:42:02,039 INFO L175 Difference]: Start difference. First operand has 143 places, 149 transitions, 1564 flow. Second operand 7 states and 302 transitions. [2024-11-20 17:42:02,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 232 transitions, 2761 flow [2024-11-20 17:42:02,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 232 transitions, 2712 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-11-20 17:42:02,072 INFO L231 Difference]: Finished difference. Result has 145 places, 169 transitions, 1897 flow [2024-11-20 17:42:02,072 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1515, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1897, PETRI_PLACES=145, PETRI_TRANSITIONS=169} [2024-11-20 17:42:02,072 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 83 predicate places. [2024-11-20 17:42:02,072 INFO L471 AbstractCegarLoop]: Abstraction has has 145 places, 169 transitions, 1897 flow [2024-11-20 17:42:02,073 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 34.5) internal successors, (276), 8 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:42:02,073 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:42:02,073 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:42:02,073 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-11-20 17:42:02,073 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-20 17:42:02,073 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:42:02,073 INFO L85 PathProgramCache]: Analyzing trace with hash -264806459, now seen corresponding path program 1 times [2024-11-20 17:42:02,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:42:02,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288471068] [2024-11-20 17:42:02,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:42:02,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:42:02,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:42:02,279 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 17:42:02,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:42:02,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288471068] [2024-11-20 17:42:02,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288471068] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:42:02,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191402905] [2024-11-20 17:42:02,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:42:02,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:42:02,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:42:02,282 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:42:02,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-20 17:42:02,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:42:02,360 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-20 17:42:02,362 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:42:02,485 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 17:42:02,485 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:42:02,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-20 17:42:02,633 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 17:42:02,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191402905] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:42:02,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:42:02,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2024-11-20 17:42:02,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481922303] [2024-11-20 17:42:02,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:42:02,635 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-20 17:42:02,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:42:02,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-20 17:42:02,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2024-11-20 17:42:03,203 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 66 [2024-11-20 17:42:03,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 169 transitions, 1897 flow. Second operand has 20 states, 20 states have (on average 30.95) internal successors, (619), 20 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:42:03,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:42:03,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 66 [2024-11-20 17:42:03,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:42:04,034 INFO L124 PetriNetUnfolderBase]: 2606/4894 cut-off events. [2024-11-20 17:42:04,034 INFO L125 PetriNetUnfolderBase]: For 30103/30226 co-relation queries the response was YES. [2024-11-20 17:42:04,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20068 conditions, 4894 events. 2606/4894 cut-off events. For 30103/30226 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 31982 event pairs, 1099 based on Foata normal form. 26/4859 useless extension candidates. Maximal degree in co-relation 20005. Up to 1546 conditions per place. [2024-11-20 17:42:04,067 INFO L140 encePairwiseOnDemand]: 56/66 looper letters, 221 selfloop transitions, 47 changer transitions 0/284 dead transitions. [2024-11-20 17:42:04,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 284 transitions, 3285 flow [2024-11-20 17:42:04,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-20 17:42:04,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-20 17:42:04,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 417 transitions. [2024-11-20 17:42:04,069 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6318181818181818 [2024-11-20 17:42:04,069 INFO L175 Difference]: Start difference. First operand has 145 places, 169 transitions, 1897 flow. Second operand 10 states and 417 transitions. [2024-11-20 17:42:04,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 284 transitions, 3285 flow [2024-11-20 17:42:04,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 284 transitions, 3187 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-11-20 17:42:04,105 INFO L231 Difference]: Finished difference. Result has 151 places, 172 transitions, 2009 flow [2024-11-20 17:42:04,105 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1828, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2009, PETRI_PLACES=151, PETRI_TRANSITIONS=172} [2024-11-20 17:42:04,106 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 89 predicate places. [2024-11-20 17:42:04,106 INFO L471 AbstractCegarLoop]: Abstraction has has 151 places, 172 transitions, 2009 flow [2024-11-20 17:42:04,106 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 30.95) internal successors, (619), 20 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:42:04,106 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:42:04,107 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:42:04,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-20 17:42:04,307 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-20 17:42:04,307 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-20 17:42:04,308 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:42:04,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1458126025, now seen corresponding path program 2 times [2024-11-20 17:42:04,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:42:04,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014870746] [2024-11-20 17:42:04,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:42:04,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:42:04,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:42:04,547 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 17:42:04,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:42:04,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014870746] [2024-11-20 17:42:04,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014870746] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:42:04,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602693059] [2024-11-20 17:42:04,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 17:42:04,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:42:04,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:42:04,550 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:42:04,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-20 17:42:04,628 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 17:42:04,628 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:42:04,629 INFO L255 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-20 17:42:04,631 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:42:04,815 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-20 17:42:04,815 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:42:05,064 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2024-11-20 17:42:05,114 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-20 17:42:05,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602693059] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:42:05,115 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:42:05,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2024-11-20 17:42:05,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173921870] [2024-11-20 17:42:05,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:42:05,115 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-20 17:42:05,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:42:05,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-20 17:42:05,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2024-11-20 17:42:06,074 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 66 [2024-11-20 17:42:06,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 172 transitions, 2009 flow. Second operand has 20 states, 20 states have (on average 29.45) internal successors, (589), 20 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:42:06,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:42:06,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 66 [2024-11-20 17:42:06,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:42:07,472 INFO L124 PetriNetUnfolderBase]: 3146/5425 cut-off events. [2024-11-20 17:42:07,473 INFO L125 PetriNetUnfolderBase]: For 46861/47205 co-relation queries the response was YES. [2024-11-20 17:42:07,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23238 conditions, 5425 events. 3146/5425 cut-off events. For 46861/47205 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 33662 event pairs, 712 based on Foata normal form. 33/5410 useless extension candidates. Maximal degree in co-relation 19766. Up to 1103 conditions per place. [2024-11-20 17:42:07,514 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 266 selfloop transitions, 75 changer transitions 0/357 dead transitions. [2024-11-20 17:42:07,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 357 transitions, 4527 flow [2024-11-20 17:42:07,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-20 17:42:07,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-20 17:42:07,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 737 transitions. [2024-11-20 17:42:07,517 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5317460317460317 [2024-11-20 17:42:07,517 INFO L175 Difference]: Start difference. First operand has 151 places, 172 transitions, 2009 flow. Second operand 21 states and 737 transitions. [2024-11-20 17:42:07,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 357 transitions, 4527 flow [2024-11-20 17:42:07,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 357 transitions, 4445 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-11-20 17:42:07,564 INFO L231 Difference]: Finished difference. Result has 167 places, 177 transitions, 2196 flow [2024-11-20 17:42:07,564 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1943, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2196, PETRI_PLACES=167, PETRI_TRANSITIONS=177} [2024-11-20 17:42:07,564 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 105 predicate places. [2024-11-20 17:42:07,564 INFO L471 AbstractCegarLoop]: Abstraction has has 167 places, 177 transitions, 2196 flow [2024-11-20 17:42:07,565 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 29.45) internal successors, (589), 20 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:42:07,565 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:42:07,565 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:42:07,573 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-20 17:42:07,765 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-20 17:42:07,765 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-20 17:42:07,766 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:42:07,766 INFO L85 PathProgramCache]: Analyzing trace with hash 2052384155, now seen corresponding path program 1 times [2024-11-20 17:42:07,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:42:07,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204450958] [2024-11-20 17:42:07,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:42:07,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:42:07,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:42:07,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:42:07,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:42:07,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204450958] [2024-11-20 17:42:07,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204450958] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:42:07,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076182780] [2024-11-20 17:42:07,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:42:07,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:42:07,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:42:07,984 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:42:07,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-20 17:42:08,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:42:08,057 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-20 17:42:08,058 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:42:08,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:42:08,320 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:42:08,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:42:08,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076182780] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-20 17:42:08,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-20 17:42:08,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 8] total 23 [2024-11-20 17:42:08,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855413132] [2024-11-20 17:42:08,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:42:08,866 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-20 17:42:08,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:42:08,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-20 17:42:08,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2024-11-20 17:42:08,924 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-20 17:42:08,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 177 transitions, 2196 flow. Second operand has 9 states, 9 states have (on average 34.44444444444444) internal successors, (310), 9 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:42:08,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:42:08,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-20 17:42:08,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:42:09,811 INFO L124 PetriNetUnfolderBase]: 2652/4942 cut-off events. [2024-11-20 17:42:09,811 INFO L125 PetriNetUnfolderBase]: For 41713/41951 co-relation queries the response was YES. [2024-11-20 17:42:09,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21344 conditions, 4942 events. 2652/4942 cut-off events. For 41713/41951 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 33253 event pairs, 804 based on Foata normal form. 22/4884 useless extension candidates. Maximal degree in co-relation 18408. Up to 2146 conditions per place. [2024-11-20 17:42:09,841 INFO L140 encePairwiseOnDemand]: 53/66 looper letters, 197 selfloop transitions, 63 changer transitions 12/294 dead transitions. [2024-11-20 17:42:09,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 294 transitions, 3723 flow [2024-11-20 17:42:09,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-20 17:42:09,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-20 17:42:09,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 572 transitions. [2024-11-20 17:42:09,843 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-11-20 17:42:09,843 INFO L175 Difference]: Start difference. First operand has 167 places, 177 transitions, 2196 flow. Second operand 14 states and 572 transitions. [2024-11-20 17:42:09,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 294 transitions, 3723 flow [2024-11-20 17:42:09,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 294 transitions, 3551 flow, removed 25 selfloop flow, removed 13 redundant places. [2024-11-20 17:42:09,894 INFO L231 Difference]: Finished difference. Result has 174 places, 190 transitions, 2345 flow [2024-11-20 17:42:09,894 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=2059, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2345, PETRI_PLACES=174, PETRI_TRANSITIONS=190} [2024-11-20 17:42:09,895 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 112 predicate places. [2024-11-20 17:42:09,895 INFO L471 AbstractCegarLoop]: Abstraction has has 174 places, 190 transitions, 2345 flow [2024-11-20 17:42:09,895 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 34.44444444444444) internal successors, (310), 9 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:42:09,895 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:42:09,895 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:42:09,901 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-20 17:42:10,096 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-20 17:42:10,097 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-20 17:42:10,097 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:42:10,097 INFO L85 PathProgramCache]: Analyzing trace with hash -2042732917, now seen corresponding path program 1 times [2024-11-20 17:42:10,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:42:10,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407509158] [2024-11-20 17:42:10,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:42:10,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:42:10,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:42:10,304 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 17:42:10,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:42:10,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407509158] [2024-11-20 17:42:10,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407509158] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:42:10,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822151267] [2024-11-20 17:42:10,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:42:10,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:42:10,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:42:10,308 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:42:10,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-20 17:42:10,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:42:10,395 INFO L255 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-20 17:42:10,397 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:42:10,409 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-20 17:42:10,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 17:42:10,473 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-20 17:42:10,482 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 17:42:10,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-20 17:42:10,576 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 17:42:10,576 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:42:10,692 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2024-11-20 17:42:10,788 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 17:42:10,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822151267] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:42:10,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:42:10,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2024-11-20 17:42:10,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843740774] [2024-11-20 17:42:10,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:42:10,789 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-20 17:42:10,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:42:10,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-20 17:42:10,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2024-11-20 17:42:11,605 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 66 [2024-11-20 17:42:11,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 190 transitions, 2345 flow. Second operand has 20 states, 20 states have (on average 29.55) internal successors, (591), 20 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:42:11,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:42:11,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 66 [2024-11-20 17:42:11,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:42:12,606 INFO L124 PetriNetUnfolderBase]: 3102/5724 cut-off events. [2024-11-20 17:42:12,606 INFO L125 PetriNetUnfolderBase]: For 49885/50215 co-relation queries the response was YES. [2024-11-20 17:42:12,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25215 conditions, 5724 events. 3102/5724 cut-off events. For 49885/50215 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 37667 event pairs, 1241 based on Foata normal form. 33/5714 useless extension candidates. Maximal degree in co-relation 25126. Up to 1832 conditions per place. [2024-11-20 17:42:12,657 INFO L140 encePairwiseOnDemand]: 56/66 looper letters, 251 selfloop transitions, 48 changer transitions 0/318 dead transitions. [2024-11-20 17:42:12,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 318 transitions, 4328 flow [2024-11-20 17:42:12,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-20 17:42:12,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-20 17:42:12,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 483 transitions. [2024-11-20 17:42:12,659 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5629370629370629 [2024-11-20 17:42:12,659 INFO L175 Difference]: Start difference. First operand has 174 places, 190 transitions, 2345 flow. Second operand 13 states and 483 transitions. [2024-11-20 17:42:12,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 318 transitions, 4328 flow [2024-11-20 17:42:12,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 318 transitions, 4196 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-11-20 17:42:12,714 INFO L231 Difference]: Finished difference. Result has 184 places, 195 transitions, 2466 flow [2024-11-20 17:42:12,714 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=2267, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2466, PETRI_PLACES=184, PETRI_TRANSITIONS=195} [2024-11-20 17:42:12,715 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 122 predicate places. [2024-11-20 17:42:12,715 INFO L471 AbstractCegarLoop]: Abstraction has has 184 places, 195 transitions, 2466 flow [2024-11-20 17:42:12,715 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 29.55) internal successors, (591), 20 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:42:12,715 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:42:12,716 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:42:12,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-20 17:42:12,916 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-20 17:42:12,916 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-20 17:42:12,917 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:42:12,917 INFO L85 PathProgramCache]: Analyzing trace with hash 243948797, now seen corresponding path program 2 times [2024-11-20 17:42:12,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:42:12,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212222304] [2024-11-20 17:42:12,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:42:12,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:42:12,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:42:13,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:42:13,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:42:13,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212222304] [2024-11-20 17:42:13,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212222304] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:42:13,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617103842] [2024-11-20 17:42:13,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 17:42:13,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:42:13,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:42:13,122 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:42:13,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-20 17:42:13,198 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-20 17:42:13,199 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:42:13,200 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-20 17:42:13,203 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:42:13,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:42:13,449 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-20 17:42:13,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617103842] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:42:13,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-20 17:42:13,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 15 [2024-11-20 17:42:13,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680528240] [2024-11-20 17:42:13,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:42:13,450 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-20 17:42:13,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:42:13,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-20 17:42:13,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2024-11-20 17:42:13,475 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-20 17:42:13,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 195 transitions, 2466 flow. Second operand has 8 states, 8 states have (on average 34.75) internal successors, (278), 8 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:42:13,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:42:13,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-20 17:42:13,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:42:14,051 INFO L124 PetriNetUnfolderBase]: 2777/5196 cut-off events. [2024-11-20 17:42:14,052 INFO L125 PetriNetUnfolderBase]: For 45163/45463 co-relation queries the response was YES. [2024-11-20 17:42:14,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23209 conditions, 5196 events. 2777/5196 cut-off events. For 45163/45463 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 34493 event pairs, 879 based on Foata normal form. 26/5136 useless extension candidates. Maximal degree in co-relation 22280. Up to 2671 conditions per place. [2024-11-20 17:42:14,087 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 192 selfloop transitions, 39 changer transitions 14/269 dead transitions. [2024-11-20 17:42:14,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 269 transitions, 3716 flow [2024-11-20 17:42:14,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 17:42:14,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-20 17:42:14,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 377 transitions. [2024-11-20 17:42:14,088 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6346801346801347 [2024-11-20 17:42:14,088 INFO L175 Difference]: Start difference. First operand has 184 places, 195 transitions, 2466 flow. Second operand 9 states and 377 transitions. [2024-11-20 17:42:14,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 269 transitions, 3716 flow [2024-11-20 17:42:14,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 269 transitions, 3683 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-11-20 17:42:14,135 INFO L231 Difference]: Finished difference. Result has 190 places, 197 transitions, 2570 flow [2024-11-20 17:42:14,135 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=2433, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2570, PETRI_PLACES=190, PETRI_TRANSITIONS=197} [2024-11-20 17:42:14,135 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 128 predicate places. [2024-11-20 17:42:14,135 INFO L471 AbstractCegarLoop]: Abstraction has has 190 places, 197 transitions, 2570 flow [2024-11-20 17:42:14,135 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 34.75) internal successors, (278), 8 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:42:14,135 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:42:14,136 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:42:14,142 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-20 17:42:14,336 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:42:14,336 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-20 17:42:14,336 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:42:14,337 INFO L85 PathProgramCache]: Analyzing trace with hash -755207473, now seen corresponding path program 3 times [2024-11-20 17:42:14,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:42:14,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111438913] [2024-11-20 17:42:14,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:42:14,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:42:14,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:42:14,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:42:14,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:42:14,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111438913] [2024-11-20 17:42:14,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111438913] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:42:14,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931489668] [2024-11-20 17:42:14,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 17:42:14,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:42:14,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:42:14,538 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:42:14,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-20 17:42:14,613 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-20 17:42:14,613 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:42:14,614 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-20 17:42:14,615 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:42:14,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:42:14,849 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-20 17:42:14,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931489668] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:42:14,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-20 17:42:14,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 15 [2024-11-20 17:42:14,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873984235] [2024-11-20 17:42:14,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:42:14,850 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-20 17:42:14,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:42:14,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-20 17:42:14,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2024-11-20 17:42:14,877 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-20 17:42:14,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 197 transitions, 2570 flow. Second operand has 8 states, 8 states have (on average 34.75) internal successors, (278), 8 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:42:14,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:42:14,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-20 17:42:14,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:42:15,521 INFO L124 PetriNetUnfolderBase]: 2725/5088 cut-off events. [2024-11-20 17:42:15,521 INFO L125 PetriNetUnfolderBase]: For 47932/48232 co-relation queries the response was YES. [2024-11-20 17:42:15,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24164 conditions, 5088 events. 2725/5088 cut-off events. For 47932/48232 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 33496 event pairs, 865 based on Foata normal form. 26/5028 useless extension candidates. Maximal degree in co-relation 23950. Up to 2577 conditions per place. [2024-11-20 17:42:15,555 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 181 selfloop transitions, 36 changer transitions 25/266 dead transitions. [2024-11-20 17:42:15,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 266 transitions, 3744 flow [2024-11-20 17:42:15,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 17:42:15,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-20 17:42:15,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 378 transitions. [2024-11-20 17:42:15,557 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6363636363636364 [2024-11-20 17:42:15,557 INFO L175 Difference]: Start difference. First operand has 190 places, 197 transitions, 2570 flow. Second operand 9 states and 378 transitions. [2024-11-20 17:42:15,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 266 transitions, 3744 flow [2024-11-20 17:42:15,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 266 transitions, 3648 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-11-20 17:42:15,609 INFO L231 Difference]: Finished difference. Result has 192 places, 192 transitions, 2494 flow [2024-11-20 17:42:15,609 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=2474, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2494, PETRI_PLACES=192, PETRI_TRANSITIONS=192} [2024-11-20 17:42:15,609 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 130 predicate places. [2024-11-20 17:42:15,609 INFO L471 AbstractCegarLoop]: Abstraction has has 192 places, 192 transitions, 2494 flow [2024-11-20 17:42:15,610 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 34.75) internal successors, (278), 8 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:42:15,610 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:42:15,610 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:42:15,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-20 17:42:15,811 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-20 17:42:15,811 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-20 17:42:15,811 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:42:15,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1255482953, now seen corresponding path program 4 times [2024-11-20 17:42:15,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:42:15,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719706252] [2024-11-20 17:42:15,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:42:15,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:42:15,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:42:16,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:42:16,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:42:16,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719706252] [2024-11-20 17:42:16,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719706252] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:42:16,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349971375] [2024-11-20 17:42:16,006 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-20 17:42:16,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:42:16,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:42:16,008 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:42:16,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-20 17:42:16,075 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-20 17:42:16,076 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:42:16,077 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-20 17:42:16,078 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:42:16,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:42:16,324 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:42:16,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:42:16,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349971375] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-20 17:42:16,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-20 17:42:16,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [9, 10] total 27 [2024-11-20 17:42:16,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85514821] [2024-11-20 17:42:16,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:42:16,693 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-20 17:42:16,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:42:16,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-20 17:42:16,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2024-11-20 17:42:16,800 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 66 [2024-11-20 17:42:16,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 192 transitions, 2494 flow. Second operand has 10 states, 10 states have (on average 33.2) internal successors, (332), 10 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:42:16,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:42:16,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 66 [2024-11-20 17:42:16,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:42:17,968 INFO L124 PetriNetUnfolderBase]: 3698/7008 cut-off events. [2024-11-20 17:42:17,968 INFO L125 PetriNetUnfolderBase]: For 60573/60910 co-relation queries the response was YES. [2024-11-20 17:42:17,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31684 conditions, 7008 events. 3698/7008 cut-off events. For 60573/60910 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 49792 event pairs, 390 based on Foata normal form. 6/6906 useless extension candidates. Maximal degree in co-relation 31151. Up to 1346 conditions per place. [2024-11-20 17:42:18,018 INFO L140 encePairwiseOnDemand]: 51/66 looper letters, 292 selfloop transitions, 118 changer transitions 26/459 dead transitions. [2024-11-20 17:42:18,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 459 transitions, 6438 flow [2024-11-20 17:42:18,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-20 17:42:18,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-20 17:42:18,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 632 transitions. [2024-11-20 17:42:18,020 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6383838383838384 [2024-11-20 17:42:18,020 INFO L175 Difference]: Start difference. First operand has 192 places, 192 transitions, 2494 flow. Second operand 15 states and 632 transitions. [2024-11-20 17:42:18,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 459 transitions, 6438 flow [2024-11-20 17:42:18,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 459 transitions, 6230 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-11-20 17:42:18,090 INFO L231 Difference]: Finished difference. Result has 204 places, 241 transitions, 3532 flow [2024-11-20 17:42:18,090 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=2390, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3532, PETRI_PLACES=204, PETRI_TRANSITIONS=241} [2024-11-20 17:42:18,091 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 142 predicate places. [2024-11-20 17:42:18,091 INFO L471 AbstractCegarLoop]: Abstraction has has 204 places, 241 transitions, 3532 flow [2024-11-20 17:42:18,091 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 33.2) internal successors, (332), 10 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:42:18,091 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:42:18,091 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:42:18,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-20 17:42:18,291 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-20 17:42:18,292 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-20 17:42:18,292 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:42:18,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1842144305, now seen corresponding path program 5 times [2024-11-20 17:42:18,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:42:18,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459767090] [2024-11-20 17:42:18,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:42:18,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:42:18,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:42:18,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:42:18,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:42:18,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459767090] [2024-11-20 17:42:18,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459767090] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:42:18,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018579918] [2024-11-20 17:42:18,486 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-20 17:42:18,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:42:18,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:42:18,487 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:42:18,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-20 17:42:18,559 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 17:42:18,559 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:42:18,560 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-20 17:42:18,562 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:42:18,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:42:18,803 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:42:19,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:42:19,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018579918] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-20 17:42:19,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-20 17:42:19,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 8] total 23 [2024-11-20 17:42:19,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236738664] [2024-11-20 17:42:19,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:42:19,409 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-20 17:42:19,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:42:19,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-20 17:42:19,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2024-11-20 17:42:19,466 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-20 17:42:19,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 241 transitions, 3532 flow. Second operand has 9 states, 9 states have (on average 34.44444444444444) internal successors, (310), 9 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:42:19,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:42:19,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-20 17:42:19,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:42:20,543 INFO L124 PetriNetUnfolderBase]: 3329/6403 cut-off events. [2024-11-20 17:42:20,543 INFO L125 PetriNetUnfolderBase]: For 68815/69307 co-relation queries the response was YES. [2024-11-20 17:42:20,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30981 conditions, 6403 events. 3329/6403 cut-off events. For 68815/69307 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 45909 event pairs, 984 based on Foata normal form. 78/6347 useless extension candidates. Maximal degree in co-relation 30863. Up to 3715 conditions per place. [2024-11-20 17:42:20,593 INFO L140 encePairwiseOnDemand]: 53/66 looper letters, 157 selfloop transitions, 83 changer transitions 30/296 dead transitions. [2024-11-20 17:42:20,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 296 transitions, 4497 flow [2024-11-20 17:42:20,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-20 17:42:20,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-20 17:42:20,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 508 transitions. [2024-11-20 17:42:20,595 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5920745920745921 [2024-11-20 17:42:20,595 INFO L175 Difference]: Start difference. First operand has 204 places, 241 transitions, 3532 flow. Second operand 13 states and 508 transitions. [2024-11-20 17:42:20,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 296 transitions, 4497 flow [2024-11-20 17:42:20,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 296 transitions, 4337 flow, removed 32 selfloop flow, removed 10 redundant places. [2024-11-20 17:42:20,707 INFO L231 Difference]: Finished difference. Result has 206 places, 228 transitions, 3336 flow [2024-11-20 17:42:20,707 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=3382, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3336, PETRI_PLACES=206, PETRI_TRANSITIONS=228} [2024-11-20 17:42:20,708 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 144 predicate places. [2024-11-20 17:42:20,708 INFO L471 AbstractCegarLoop]: Abstraction has has 206 places, 228 transitions, 3336 flow [2024-11-20 17:42:20,708 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 34.44444444444444) internal successors, (310), 9 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:42:20,708 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:42:20,708 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:42:20,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-20 17:42:20,908 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:42:20,909 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-20 17:42:20,909 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:42:20,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1936349030, now seen corresponding path program 1 times [2024-11-20 17:42:20,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:42:20,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79722767] [2024-11-20 17:42:20,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:42:20,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:42:20,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:42:21,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:42:21,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:42:21,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79722767] [2024-11-20 17:42:21,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79722767] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:42:21,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570530483] [2024-11-20 17:42:21,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:42:21,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:42:21,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:42:21,118 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:42:21,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-20 17:42:21,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:42:21,196 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-20 17:42:21,198 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:42:21,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:42:21,483 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:42:22,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:42:22,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570530483] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-20 17:42:22,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-20 17:42:22,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 26 [2024-11-20 17:42:22,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55488015] [2024-11-20 17:42:22,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:42:22,044 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-20 17:42:22,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:42:22,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-20 17:42:22,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2024-11-20 17:42:22,090 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-20 17:42:22,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 228 transitions, 3336 flow. Second operand has 10 states, 10 states have (on average 34.2) internal successors, (342), 10 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:42:22,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:42:22,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-20 17:42:22,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:42:23,221 INFO L124 PetriNetUnfolderBase]: 3409/6575 cut-off events. [2024-11-20 17:42:23,221 INFO L125 PetriNetUnfolderBase]: For 66558/67060 co-relation queries the response was YES. [2024-11-20 17:42:23,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31066 conditions, 6575 events. 3409/6575 cut-off events. For 66558/67060 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 47727 event pairs, 956 based on Foata normal form. 58/6492 useless extension candidates. Maximal degree in co-relation 30936. Up to 3590 conditions per place. [2024-11-20 17:42:23,258 INFO L140 encePairwiseOnDemand]: 52/66 looper letters, 196 selfloop transitions, 93 changer transitions 12/327 dead transitions. [2024-11-20 17:42:23,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 327 transitions, 4757 flow [2024-11-20 17:42:23,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-20 17:42:23,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-20 17:42:23,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 536 transitions. [2024-11-20 17:42:23,259 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6247086247086248 [2024-11-20 17:42:23,259 INFO L175 Difference]: Start difference. First operand has 206 places, 228 transitions, 3336 flow. Second operand 13 states and 536 transitions. [2024-11-20 17:42:23,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 327 transitions, 4757 flow [2024-11-20 17:42:23,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 327 transitions, 4538 flow, removed 18 selfloop flow, removed 12 redundant places. [2024-11-20 17:42:23,345 INFO L231 Difference]: Finished difference. Result has 207 places, 237 transitions, 3467 flow [2024-11-20 17:42:23,345 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=3139, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3467, PETRI_PLACES=207, PETRI_TRANSITIONS=237} [2024-11-20 17:42:23,345 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 145 predicate places. [2024-11-20 17:42:23,345 INFO L471 AbstractCegarLoop]: Abstraction has has 207 places, 237 transitions, 3467 flow [2024-11-20 17:42:23,346 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 34.2) internal successors, (342), 10 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:42:23,346 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:42:23,346 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:42:23,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-20 17:42:23,546 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:42:23,547 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-20 17:42:23,547 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:42:23,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1662315244, now seen corresponding path program 2 times [2024-11-20 17:42:23,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:42:23,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314451242] [2024-11-20 17:42:23,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:42:23,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:42:23,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:42:23,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:42:23,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:42:23,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314451242] [2024-11-20 17:42:23,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314451242] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:42:23,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712605603] [2024-11-20 17:42:23,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 17:42:23,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:42:23,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:42:23,743 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:42:23,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-20 17:42:23,807 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-20 17:42:23,807 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:42:23,808 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-20 17:42:23,809 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:42:24,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:42:24,047 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-20 17:42:24,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712605603] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:42:24,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-20 17:42:24,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 17 [2024-11-20 17:42:24,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869066441] [2024-11-20 17:42:24,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:42:24,048 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-20 17:42:24,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:42:24,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-20 17:42:24,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2024-11-20 17:42:24,071 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-20 17:42:24,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 237 transitions, 3467 flow. Second operand has 9 states, 9 states have (on average 34.44444444444444) internal successors, (310), 9 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:42:24,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:42:24,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-20 17:42:24,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:42:24,931 INFO L124 PetriNetUnfolderBase]: 3367/6507 cut-off events. [2024-11-20 17:42:24,931 INFO L125 PetriNetUnfolderBase]: For 65689/66181 co-relation queries the response was YES. [2024-11-20 17:42:24,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30910 conditions, 6507 events. 3367/6507 cut-off events. For 65689/66181 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 47373 event pairs, 998 based on Foata normal form. 58/6419 useless extension candidates. Maximal degree in co-relation 30777. Up to 3933 conditions per place. [2024-11-20 17:42:24,967 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 184 selfloop transitions, 72 changer transitions 15/297 dead transitions. [2024-11-20 17:42:24,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 297 transitions, 4578 flow [2024-11-20 17:42:24,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 17:42:24,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-20 17:42:24,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 373 transitions. [2024-11-20 17:42:24,968 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6279461279461279 [2024-11-20 17:42:24,969 INFO L175 Difference]: Start difference. First operand has 207 places, 237 transitions, 3467 flow. Second operand 9 states and 373 transitions. [2024-11-20 17:42:24,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 297 transitions, 4578 flow [2024-11-20 17:42:25,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 297 transitions, 4471 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-11-20 17:42:25,066 INFO L231 Difference]: Finished difference. Result has 211 places, 239 transitions, 3552 flow [2024-11-20 17:42:25,066 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=3370, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3552, PETRI_PLACES=211, PETRI_TRANSITIONS=239} [2024-11-20 17:42:25,066 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 149 predicate places. [2024-11-20 17:42:25,066 INFO L471 AbstractCegarLoop]: Abstraction has has 211 places, 239 transitions, 3552 flow [2024-11-20 17:42:25,067 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 34.44444444444444) internal successors, (310), 9 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:42:25,067 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:42:25,067 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:42:25,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-20 17:42:25,267 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:42:25,267 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-20 17:42:25,268 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:42:25,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1395325048, now seen corresponding path program 3 times [2024-11-20 17:42:25,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:42:25,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106790622] [2024-11-20 17:42:25,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:42:25,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:42:25,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:42:25,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:42:25,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:42:25,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106790622] [2024-11-20 17:42:25,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106790622] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:42:25,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549163572] [2024-11-20 17:42:25,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 17:42:25,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:42:25,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:42:25,474 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:42:25,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-20 17:42:25,551 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-20 17:42:25,552 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:42:25,553 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-20 17:42:25,554 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:42:25,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:42:25,805 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-20 17:42:25,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549163572] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:42:25,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-20 17:42:25,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 17 [2024-11-20 17:42:25,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352863618] [2024-11-20 17:42:25,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:42:25,806 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-20 17:42:25,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:42:25,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-20 17:42:25,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2024-11-20 17:42:25,834 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-20 17:42:25,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 239 transitions, 3552 flow. Second operand has 9 states, 9 states have (on average 34.44444444444444) internal successors, (310), 9 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:42:25,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:42:25,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-20 17:42:25,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:42:26,618 INFO L124 PetriNetUnfolderBase]: 3315/6399 cut-off events. [2024-11-20 17:42:26,618 INFO L125 PetriNetUnfolderBase]: For 68592/69084 co-relation queries the response was YES. [2024-11-20 17:42:26,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31023 conditions, 6399 events. 3315/6399 cut-off events. For 68592/69084 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 46483 event pairs, 985 based on Foata normal form. 58/6311 useless extension candidates. Maximal degree in co-relation 30898. Up to 3839 conditions per place. [2024-11-20 17:42:26,672 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 173 selfloop transitions, 69 changer transitions 26/294 dead transitions. [2024-11-20 17:42:26,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 294 transitions, 4570 flow [2024-11-20 17:42:26,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 17:42:26,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-20 17:42:26,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 374 transitions. [2024-11-20 17:42:26,673 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6296296296296297 [2024-11-20 17:42:26,673 INFO L175 Difference]: Start difference. First operand has 211 places, 239 transitions, 3552 flow. Second operand 9 states and 374 transitions. [2024-11-20 17:42:26,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 294 transitions, 4570 flow [2024-11-20 17:42:26,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 294 transitions, 4430 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-11-20 17:42:26,895 INFO L231 Difference]: Finished difference. Result has 213 places, 234 transitions, 3469 flow [2024-11-20 17:42:26,896 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=3412, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3469, PETRI_PLACES=213, PETRI_TRANSITIONS=234} [2024-11-20 17:42:26,896 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 151 predicate places. [2024-11-20 17:42:26,896 INFO L471 AbstractCegarLoop]: Abstraction has has 213 places, 234 transitions, 3469 flow [2024-11-20 17:42:26,896 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 34.44444444444444) internal successors, (310), 9 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:42:26,896 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:42:26,896 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:42:26,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-20 17:42:27,097 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-11-20 17:42:27,097 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-20 17:42:27,097 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:42:27,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1895600528, now seen corresponding path program 4 times [2024-11-20 17:42:27,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:42:27,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276113880] [2024-11-20 17:42:27,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:42:27,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:42:27,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:42:27,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:42:27,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:42:27,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276113880] [2024-11-20 17:42:27,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276113880] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:42:27,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551346125] [2024-11-20 17:42:27,277 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-20 17:42:27,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:42:27,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:42:27,279 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:42:27,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-20 17:42:27,346 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-20 17:42:27,346 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:42:27,347 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-20 17:42:27,348 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:42:27,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:42:27,559 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:42:27,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:42:27,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551346125] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-20 17:42:27,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-20 17:42:27,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 26 [2024-11-20 17:42:27,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222167240] [2024-11-20 17:42:27,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:42:27,853 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-20 17:42:27,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:42:27,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-20 17:42:27,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2024-11-20 17:42:27,892 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-20 17:42:27,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 234 transitions, 3469 flow. Second operand has 10 states, 10 states have (on average 34.2) internal successors, (342), 10 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:42:27,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:42:27,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-20 17:42:27,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:42:28,864 INFO L124 PetriNetUnfolderBase]: 3227/6221 cut-off events. [2024-11-20 17:42:28,864 INFO L125 PetriNetUnfolderBase]: For 67130/67632 co-relation queries the response was YES. [2024-11-20 17:42:28,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30193 conditions, 6221 events. 3227/6221 cut-off events. For 67130/67632 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 44782 event pairs, 944 based on Foata normal form. 58/6138 useless extension candidates. Maximal degree in co-relation 30077. Up to 3590 conditions per place. [2024-11-20 17:42:28,898 INFO L140 encePairwiseOnDemand]: 52/66 looper letters, 156 selfloop transitions, 87 changer transitions 21/290 dead transitions. [2024-11-20 17:42:28,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 290 transitions, 4354 flow [2024-11-20 17:42:28,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-20 17:42:28,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-20 17:42:28,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 480 transitions. [2024-11-20 17:42:28,900 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6060606060606061 [2024-11-20 17:42:28,900 INFO L175 Difference]: Start difference. First operand has 213 places, 234 transitions, 3469 flow. Second operand 12 states and 480 transitions. [2024-11-20 17:42:28,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 290 transitions, 4354 flow [2024-11-20 17:42:28,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 290 transitions, 4207 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-11-20 17:42:28,994 INFO L231 Difference]: Finished difference. Result has 213 places, 228 transitions, 3418 flow [2024-11-20 17:42:28,994 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=3324, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3418, PETRI_PLACES=213, PETRI_TRANSITIONS=228} [2024-11-20 17:42:28,994 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 151 predicate places. [2024-11-20 17:42:28,994 INFO L471 AbstractCegarLoop]: Abstraction has has 213 places, 228 transitions, 3418 flow [2024-11-20 17:42:28,995 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 34.2) internal successors, (342), 10 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:42:28,995 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:42:28,995 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:42:29,001 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-20 17:42:29,195 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-11-20 17:42:29,195 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-20 17:42:29,196 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:42:29,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1755724260, now seen corresponding path program 5 times [2024-11-20 17:42:29,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:42:29,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706032625] [2024-11-20 17:42:29,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:42:29,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:42:29,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:42:29,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:42:29,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:42:29,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706032625] [2024-11-20 17:42:29,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706032625] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:42:29,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457043735] [2024-11-20 17:42:29,394 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-20 17:42:29,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:42:29,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:42:29,396 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:42:29,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-20 17:42:29,469 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 17:42:29,469 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:42:29,470 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-20 17:42:29,471 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:42:29,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:42:29,689 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:42:30,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:42:30,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457043735] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-20 17:42:30,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-20 17:42:30,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 26 [2024-11-20 17:42:30,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712574462] [2024-11-20 17:42:30,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:42:30,199 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-20 17:42:30,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:42:30,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-20 17:42:30,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2024-11-20 17:42:30,255 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-20 17:42:30,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 228 transitions, 3418 flow. Second operand has 10 states, 10 states have (on average 34.2) internal successors, (342), 10 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:42:30,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:42:30,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-20 17:42:30,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:42:31,362 INFO L124 PetriNetUnfolderBase]: 3199/6109 cut-off events. [2024-11-20 17:42:31,362 INFO L125 PetriNetUnfolderBase]: For 66841/67361 co-relation queries the response was YES. [2024-11-20 17:42:31,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29805 conditions, 6109 events. 3199/6109 cut-off events. For 66841/67361 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 44060 event pairs, 930 based on Foata normal form. 70/6042 useless extension candidates. Maximal degree in co-relation 29690. Up to 3608 conditions per place. [2024-11-20 17:42:31,416 INFO L140 encePairwiseOnDemand]: 52/66 looper letters, 145 selfloop transitions, 83 changer transitions 26/280 dead transitions. [2024-11-20 17:42:31,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 280 transitions, 4305 flow [2024-11-20 17:42:31,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-20 17:42:31,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-20 17:42:31,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 472 transitions. [2024-11-20 17:42:31,418 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5959595959595959 [2024-11-20 17:42:31,418 INFO L175 Difference]: Start difference. First operand has 213 places, 228 transitions, 3418 flow. Second operand 12 states and 472 transitions. [2024-11-20 17:42:31,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 280 transitions, 4305 flow [2024-11-20 17:42:31,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 280 transitions, 4227 flow, removed 11 selfloop flow, removed 11 redundant places. [2024-11-20 17:42:31,537 INFO L231 Difference]: Finished difference. Result has 212 places, 221 transitions, 3423 flow [2024-11-20 17:42:31,538 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=3350, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3423, PETRI_PLACES=212, PETRI_TRANSITIONS=221} [2024-11-20 17:42:31,538 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 150 predicate places. [2024-11-20 17:42:31,538 INFO L471 AbstractCegarLoop]: Abstraction has has 212 places, 221 transitions, 3423 flow [2024-11-20 17:42:31,538 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 34.2) internal successors, (342), 10 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:42:31,539 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:42:31,539 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:42:31,545 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-20 17:42:31,739 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:42:31,739 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-20 17:42:31,740 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:42:31,740 INFO L85 PathProgramCache]: Analyzing trace with hash -330388147, now seen corresponding path program 6 times [2024-11-20 17:42:31,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:42:31,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808865750] [2024-11-20 17:42:31,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:42:31,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:42:31,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:42:31,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:42:31,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:42:31,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808865750] [2024-11-20 17:42:31,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808865750] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:42:31,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253408295] [2024-11-20 17:42:31,959 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-20 17:42:31,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:42:31,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:42:31,961 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:42:31,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-20 17:42:32,030 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-11-20 17:42:32,030 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:42:32,031 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-20 17:42:32,032 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:42:32,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:42:32,219 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-20 17:42:32,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253408295] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:42:32,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-20 17:42:32,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 15 [2024-11-20 17:42:32,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213483970] [2024-11-20 17:42:32,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:42:32,221 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-20 17:42:32,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:42:32,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-20 17:42:32,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2024-11-20 17:42:32,246 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-20 17:42:32,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 221 transitions, 3423 flow. Second operand has 8 states, 8 states have (on average 34.75) internal successors, (278), 8 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:42:32,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:42:32,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-20 17:42:32,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:42:33,052 INFO L124 PetriNetUnfolderBase]: 3093/5953 cut-off events. [2024-11-20 17:42:33,052 INFO L125 PetriNetUnfolderBase]: For 68709/69211 co-relation queries the response was YES. [2024-11-20 17:42:33,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29364 conditions, 5953 events. 3093/5953 cut-off events. For 68709/69211 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 42827 event pairs, 935 based on Foata normal form. 70/5886 useless extension candidates. Maximal degree in co-relation 29259. Up to 3591 conditions per place. [2024-11-20 17:42:33,097 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 140 selfloop transitions, 54 changer transitions 34/254 dead transitions. [2024-11-20 17:42:33,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 254 transitions, 4098 flow [2024-11-20 17:42:33,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 17:42:33,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-20 17:42:33,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 365 transitions. [2024-11-20 17:42:33,099 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6144781144781145 [2024-11-20 17:42:33,099 INFO L175 Difference]: Start difference. First operand has 212 places, 221 transitions, 3423 flow. Second operand 9 states and 365 transitions. [2024-11-20 17:42:33,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 254 transitions, 4098 flow [2024-11-20 17:42:33,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 254 transitions, 3973 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-11-20 17:42:33,206 INFO L231 Difference]: Finished difference. Result has 207 places, 202 transitions, 3189 flow [2024-11-20 17:42:33,206 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=3298, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3189, PETRI_PLACES=207, PETRI_TRANSITIONS=202} [2024-11-20 17:42:33,207 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 145 predicate places. [2024-11-20 17:42:33,207 INFO L471 AbstractCegarLoop]: Abstraction has has 207 places, 202 transitions, 3189 flow [2024-11-20 17:42:33,207 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 34.75) internal successors, (278), 8 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:42:33,207 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:42:33,207 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:42:33,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-11-20 17:42:33,408 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:42:33,408 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-20 17:42:33,408 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:42:33,408 INFO L85 PathProgramCache]: Analyzing trace with hash -970505722, now seen corresponding path program 6 times [2024-11-20 17:42:33,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:42:33,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193675865] [2024-11-20 17:42:33,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:42:33,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:42:33,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:42:33,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:42:33,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:42:33,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193675865] [2024-11-20 17:42:33,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193675865] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:42:33,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970200592] [2024-11-20 17:42:33,596 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-20 17:42:33,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:42:33,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:42:33,598 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:42:33,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-20 17:42:33,666 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-11-20 17:42:33,666 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:42:33,667 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-20 17:42:33,668 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:42:33,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:42:33,851 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-20 17:42:33,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970200592] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:42:33,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-20 17:42:33,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 17 [2024-11-20 17:42:33,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158491380] [2024-11-20 17:42:33,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:42:33,852 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-20 17:42:33,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:42:33,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-20 17:42:33,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2024-11-20 17:42:33,885 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-20 17:42:33,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 202 transitions, 3189 flow. Second operand has 9 states, 9 states have (on average 34.44444444444444) internal successors, (310), 9 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:42:33,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:42:33,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-20 17:42:33,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:42:34,537 INFO L124 PetriNetUnfolderBase]: 3058/5792 cut-off events. [2024-11-20 17:42:34,537 INFO L125 PetriNetUnfolderBase]: For 68399/68924 co-relation queries the response was YES. [2024-11-20 17:42:34,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29848 conditions, 5792 events. 3058/5792 cut-off events. For 68399/68924 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 41419 event pairs, 902 based on Foata normal form. 58/5709 useless extension candidates. Maximal degree in co-relation 29688. Up to 3507 conditions per place. [2024-11-20 17:42:34,580 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 127 selfloop transitions, 55 changer transitions 28/236 dead transitions. [2024-11-20 17:42:34,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 236 transitions, 3830 flow [2024-11-20 17:42:34,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 17:42:34,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-20 17:42:34,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 361 transitions. [2024-11-20 17:42:34,582 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6077441077441077 [2024-11-20 17:42:34,582 INFO L175 Difference]: Start difference. First operand has 207 places, 202 transitions, 3189 flow. Second operand 9 states and 361 transitions. [2024-11-20 17:42:34,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 236 transitions, 3830 flow [2024-11-20 17:42:34,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 236 transitions, 3456 flow, removed 41 selfloop flow, removed 17 redundant places. [2024-11-20 17:42:34,694 INFO L231 Difference]: Finished difference. Result has 183 places, 190 transitions, 2774 flow [2024-11-20 17:42:34,694 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=2825, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2774, PETRI_PLACES=183, PETRI_TRANSITIONS=190} [2024-11-20 17:42:34,694 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 121 predicate places. [2024-11-20 17:42:34,694 INFO L471 AbstractCegarLoop]: Abstraction has has 183 places, 190 transitions, 2774 flow [2024-11-20 17:42:34,695 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 34.44444444444444) internal successors, (310), 9 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:42:34,695 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:42:34,695 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:42:34,701 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-20 17:42:34,895 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-20 17:42:34,895 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-20 17:42:34,896 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:42:34,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1006245536, now seen corresponding path program 3 times [2024-11-20 17:42:34,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:42:34,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531583373] [2024-11-20 17:42:34,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:42:34,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:42:34,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:42:34,995 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 17:42:34,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:42:34,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531583373] [2024-11-20 17:42:34,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531583373] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:42:34,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573681116] [2024-11-20 17:42:34,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 17:42:34,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:42:34,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:42:34,999 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:42:35,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-20 17:42:35,081 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-20 17:42:35,081 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:42:35,082 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-20 17:42:35,085 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:42:35,092 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-20 17:42:35,145 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-20 17:42:35,146 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 17 [2024-11-20 17:42:35,161 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 17:42:35,162 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-20 17:42:35,264 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-20 17:42:35,264 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:42:35,422 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 38 [2024-11-20 17:42:35,458 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-20 17:42:35,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573681116] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:42:35,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:42:35,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 21 [2024-11-20 17:42:35,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801588478] [2024-11-20 17:42:35,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:42:35,459 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-20 17:42:35,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:42:35,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-20 17:42:35,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2024-11-20 17:42:36,427 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 66 [2024-11-20 17:42:36,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 190 transitions, 2774 flow. Second operand has 22 states, 22 states have (on average 26.545454545454547) internal successors, (584), 22 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:42:36,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:42:36,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 66 [2024-11-20 17:42:36,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:42:38,477 INFO L124 PetriNetUnfolderBase]: 6790/12213 cut-off events. [2024-11-20 17:42:38,477 INFO L125 PetriNetUnfolderBase]: For 112532/112552 co-relation queries the response was YES. [2024-11-20 17:42:38,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59755 conditions, 12213 events. 6790/12213 cut-off events. For 112532/112552 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 88664 event pairs, 2308 based on Foata normal form. 80/12265 useless extension candidates. Maximal degree in co-relation 59640. Up to 2993 conditions per place. [2024-11-20 17:42:38,576 INFO L140 encePairwiseOnDemand]: 54/66 looper letters, 429 selfloop transitions, 100 changer transitions 0/542 dead transitions. [2024-11-20 17:42:38,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 542 transitions, 8407 flow [2024-11-20 17:42:38,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-20 17:42:38,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-20 17:42:38,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 673 transitions. [2024-11-20 17:42:38,578 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5098484848484849 [2024-11-20 17:42:38,578 INFO L175 Difference]: Start difference. First operand has 183 places, 190 transitions, 2774 flow. Second operand 20 states and 673 transitions. [2024-11-20 17:42:38,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 542 transitions, 8407 flow [2024-11-20 17:42:38,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 542 transitions, 7863 flow, removed 77 selfloop flow, removed 9 redundant places. [2024-11-20 17:42:38,830 INFO L231 Difference]: Finished difference. Result has 181 places, 227 transitions, 3452 flow [2024-11-20 17:42:38,830 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=2552, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3452, PETRI_PLACES=181, PETRI_TRANSITIONS=227} [2024-11-20 17:42:38,831 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 119 predicate places. [2024-11-20 17:42:38,831 INFO L471 AbstractCegarLoop]: Abstraction has has 181 places, 227 transitions, 3452 flow [2024-11-20 17:42:38,831 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 26.545454545454547) internal successors, (584), 22 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:42:38,831 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:42:38,831 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:42:38,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-11-20 17:42:39,031 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-11-20 17:42:39,032 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-20 17:42:39,032 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:42:39,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1381627071, now seen corresponding path program 1 times [2024-11-20 17:42:39,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:42:39,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792301823] [2024-11-20 17:42:39,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:42:39,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:42:39,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:42:39,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:42:39,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:42:39,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792301823] [2024-11-20 17:42:39,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792301823] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:42:39,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201323357] [2024-11-20 17:42:39,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:42:39,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:42:39,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:42:39,162 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:42:39,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-20 17:42:39,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:42:39,244 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-20 17:42:39,245 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:42:39,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:42:39,325 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:42:39,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:42:39,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201323357] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-20 17:42:39,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-20 17:42:39,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 6] total 14 [2024-11-20 17:42:39,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408002009] [2024-11-20 17:42:39,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:42:39,389 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-20 17:42:39,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:42:39,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-20 17:42:39,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2024-11-20 17:42:39,428 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 66 [2024-11-20 17:42:39,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 227 transitions, 3452 flow. Second operand has 7 states, 7 states have (on average 34.42857142857143) internal successors, (241), 7 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:42:39,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:42:39,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 66 [2024-11-20 17:42:39,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:42:40,481 INFO L124 PetriNetUnfolderBase]: 4865/9807 cut-off events. [2024-11-20 17:42:40,481 INFO L125 PetriNetUnfolderBase]: For 91225/91827 co-relation queries the response was YES. [2024-11-20 17:42:40,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45580 conditions, 9807 events. 4865/9807 cut-off events. For 91225/91827 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 78958 event pairs, 1794 based on Foata normal form. 276/10020 useless extension candidates. Maximal degree in co-relation 41697. Up to 4456 conditions per place. [2024-11-20 17:42:40,545 INFO L140 encePairwiseOnDemand]: 57/66 looper letters, 232 selfloop transitions, 30 changer transitions 0/287 dead transitions. [2024-11-20 17:42:40,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 287 transitions, 5014 flow [2024-11-20 17:42:40,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 17:42:40,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-20 17:42:40,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 263 transitions. [2024-11-20 17:42:40,546 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5692640692640693 [2024-11-20 17:42:40,546 INFO L175 Difference]: Start difference. First operand has 181 places, 227 transitions, 3452 flow. Second operand 7 states and 263 transitions. [2024-11-20 17:42:40,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 287 transitions, 5014 flow [2024-11-20 17:42:40,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 287 transitions, 4822 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-11-20 17:42:40,677 INFO L231 Difference]: Finished difference. Result has 182 places, 209 transitions, 3011 flow [2024-11-20 17:42:40,678 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=2888, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3011, PETRI_PLACES=182, PETRI_TRANSITIONS=209} [2024-11-20 17:42:40,678 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 120 predicate places. [2024-11-20 17:42:40,678 INFO L471 AbstractCegarLoop]: Abstraction has has 182 places, 209 transitions, 3011 flow [2024-11-20 17:42:40,678 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 34.42857142857143) internal successors, (241), 7 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:42:40,678 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:42:40,679 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:42:40,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-11-20 17:42:40,879 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-11-20 17:42:40,879 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-20 17:42:40,879 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:42:40,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1821426884, now seen corresponding path program 2 times [2024-11-20 17:42:40,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:42:40,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745916076] [2024-11-20 17:42:40,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:42:40,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:42:40,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:42:40,979 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 17:42:40,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:42:40,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745916076] [2024-11-20 17:42:40,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745916076] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:42:40,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934637002] [2024-11-20 17:42:40,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 17:42:40,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:42:40,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:42:40,983 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:42:40,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-20 17:42:41,067 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-20 17:42:41,067 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:42:41,068 INFO L255 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-20 17:42:41,069 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:42:41,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-20 17:42:41,083 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-20 17:42:41,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 17:42:41,146 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-20 17:42:41,157 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 17:42:41,158 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-20 17:42:41,457 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-20 17:42:41,457 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:42:41,928 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-20 17:42:41,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934637002] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:42:41,928 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:42:41,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 19 [2024-11-20 17:42:41,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786171743] [2024-11-20 17:42:41,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:42:41,929 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-20 17:42:41,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:42:41,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-20 17:42:41,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2024-11-20 17:42:42,916 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 66 [2024-11-20 17:42:42,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 209 transitions, 3011 flow. Second operand has 19 states, 19 states have (on average 27.31578947368421) internal successors, (519), 19 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:42:42,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:42:42,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 66 [2024-11-20 17:42:42,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:42:45,329 INFO L124 PetriNetUnfolderBase]: 10479/17847 cut-off events. [2024-11-20 17:42:45,329 INFO L125 PetriNetUnfolderBase]: For 197048/198691 co-relation queries the response was YES. [2024-11-20 17:42:45,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90510 conditions, 17847 events. 10479/17847 cut-off events. For 197048/198691 co-relation queries the response was YES. Maximal size of possible extension queue 607. Compared 135116 event pairs, 2220 based on Foata normal form. 384/18183 useless extension candidates. Maximal degree in co-relation 76531. Up to 3862 conditions per place. [2024-11-20 17:42:45,493 INFO L140 encePairwiseOnDemand]: 56/66 looper letters, 570 selfloop transitions, 82 changer transitions 0/669 dead transitions. [2024-11-20 17:42:45,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 669 transitions, 11818 flow [2024-11-20 17:42:45,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-20 17:42:45,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-20 17:42:45,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 571 transitions. [2024-11-20 17:42:45,494 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5089126559714795 [2024-11-20 17:42:45,494 INFO L175 Difference]: Start difference. First operand has 182 places, 209 transitions, 3011 flow. Second operand 17 states and 571 transitions. [2024-11-20 17:42:45,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 669 transitions, 11818 flow [2024-11-20 17:42:45,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 669 transitions, 11706 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-11-20 17:42:45,832 INFO L231 Difference]: Finished difference. Result has 195 places, 243 transitions, 3760 flow [2024-11-20 17:42:45,833 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=2930, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3760, PETRI_PLACES=195, PETRI_TRANSITIONS=243} [2024-11-20 17:42:45,833 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 133 predicate places. [2024-11-20 17:42:45,833 INFO L471 AbstractCegarLoop]: Abstraction has has 195 places, 243 transitions, 3760 flow [2024-11-20 17:42:45,834 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 27.31578947368421) internal successors, (519), 19 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:42:45,834 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:42:45,834 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:42:45,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-11-20 17:42:46,034 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-11-20 17:42:46,034 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-20 17:42:46,035 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:42:46,035 INFO L85 PathProgramCache]: Analyzing trace with hash 456846371, now seen corresponding path program 2 times [2024-11-20 17:42:46,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:42:46,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734574033] [2024-11-20 17:42:46,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:42:46,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:42:46,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:42:46,138 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-20 17:42:46,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:42:46,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734574033] [2024-11-20 17:42:46,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734574033] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:42:46,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498396475] [2024-11-20 17:42:46,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 17:42:46,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:42:46,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:42:46,139 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:42:46,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-20 17:42:46,212 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-20 17:42:46,212 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:42:46,213 INFO L255 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-20 17:42:46,214 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:42:46,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-20 17:42:46,503 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-20 17:42:46,503 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:42:46,900 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-20 17:42:46,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498396475] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:42:46,900 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:42:46,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 19 [2024-11-20 17:42:46,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315655731] [2024-11-20 17:42:46,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:42:46,901 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-20 17:42:46,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:42:46,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-20 17:42:46,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342