./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 3061b6dc Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/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 ../sv-benchmarks/c/weaver/chl-nzb-file-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 48ddce9ee02b3ea4431cf137593b71facb450c3e223dbff4f116c3c0ac1377b5 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-19 09:45:25,223 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 09:45:25,308 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-19 09:45:25,314 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 09:45:25,314 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 09:45:25,347 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 09:45:25,347 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 09:45:25,348 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 09:45:25,349 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 09:45:25,351 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 09:45:25,351 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 09:45:25,351 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 09:45:25,352 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 09:45:25,352 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 09:45:25,353 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 09:45:25,355 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 09:45:25,355 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 09:45:25,356 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 09:45:25,356 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 09:45:25,356 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 09:45:25,356 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-19 09:45:25,360 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-19 09:45:25,361 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-19 09:45:25,361 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 09:45:25,361 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-19 09:45:25,361 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 09:45:25,362 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-19 09:45:25,362 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 09:45:25,363 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 09:45:25,363 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 09:45:25,364 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 09:45:25,364 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 09:45:25,364 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 09:45:25,364 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 09:45:25,365 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 09:45:25,365 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 09:45:25,366 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 09:45:25,366 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 09:45:25,366 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 09:45:25,366 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 09:45:25,367 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 09:45:25,367 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 09:45:25,367 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 48ddce9ee02b3ea4431cf137593b71facb450c3e223dbff4f116c3c0ac1377b5 [2024-11-19 09:45:25,629 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 09:45:25,653 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 09:45:25,655 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 09:45:25,657 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 09:45:25,657 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 09:45:25,658 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c [2024-11-19 09:45:27,174 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 09:45:27,370 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 09:45:27,370 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c [2024-11-19 09:45:27,382 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0a1f094b/0f418598271d47dcbc15589c97c63959/FLAG2d1efc1d6 [2024-11-19 09:45:27,743 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0a1f094b/0f418598271d47dcbc15589c97c63959 [2024-11-19 09:45:27,745 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 09:45:27,747 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 09:45:27,748 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 09:45:27,748 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 09:45:27,752 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 09:45:27,753 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:45:27" (1/1) ... [2024-11-19 09:45:27,754 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f743a02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:45:27, skipping insertion in model container [2024-11-19 09:45:27,754 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:45:27" (1/1) ... [2024-11-19 09:45:27,785 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 09:45:28,054 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-19 09:45:28,062 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 09:45:28,075 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 09:45:28,116 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 09:45:28,141 INFO L204 MainTranslator]: Completed translation [2024-11-19 09:45:28,142 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:45:28 WrapperNode [2024-11-19 09:45:28,142 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 09:45:28,143 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 09:45:28,144 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 09:45:28,144 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 09:45:28,152 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:45:28" (1/1) ... [2024-11-19 09:45:28,163 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:45:28" (1/1) ... [2024-11-19 09:45:28,202 INFO L138 Inliner]: procedures = 24, calls = 46, calls flagged for inlining = 22, calls inlined = 30, statements flattened = 409 [2024-11-19 09:45:28,203 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 09:45:28,204 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 09:45:28,207 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 09:45:28,207 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 09:45:28,216 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:45:28" (1/1) ... [2024-11-19 09:45:28,217 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:45:28" (1/1) ... [2024-11-19 09:45:28,226 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:45:28" (1/1) ... [2024-11-19 09:45:28,250 INFO L175 MemorySlicer]: Split 20 memory accesses to 2 slices as follows [2, 18]. 90 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-19 09:45:28,250 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:45:28" (1/1) ... [2024-11-19 09:45:28,251 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:45:28" (1/1) ... [2024-11-19 09:45:28,272 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:45:28" (1/1) ... [2024-11-19 09:45:28,284 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:45:28" (1/1) ... [2024-11-19 09:45:28,289 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:45:28" (1/1) ... [2024-11-19 09:45:28,291 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:45:28" (1/1) ... [2024-11-19 09:45:28,300 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 09:45:28,305 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 09:45:28,306 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 09:45:28,306 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 09:45:28,307 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:45:28" (1/1) ... [2024-11-19 09:45:28,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 09:45:28,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:45:28,385 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) [2024-11-19 09:45:28,388 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 [2024-11-19 09:45:28,465 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 09:45:28,465 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-19 09:45:28,466 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-19 09:45:28,466 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-19 09:45:28,466 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-19 09:45:28,466 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-19 09:45:28,466 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-19 09:45:28,466 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-19 09:45:28,466 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-19 09:45:28,466 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-19 09:45:28,467 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 09:45:28,467 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 09:45:28,467 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-19 09:45:28,467 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-19 09:45:28,472 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-19 09:45:28,618 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 09:45:28,620 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 09:45:29,319 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-19 09:45:29,319 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 09:45:29,832 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 09:45:29,833 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-19 09:45:29,833 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:45:29 BoogieIcfgContainer [2024-11-19 09:45:29,833 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 09:45:29,835 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 09:45:29,835 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 09:45:29,839 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 09:45:29,840 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 09:45:27" (1/3) ... [2024-11-19 09:45:29,841 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7124835d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:45:29, skipping insertion in model container [2024-11-19 09:45:29,841 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:45:28" (2/3) ... [2024-11-19 09:45:29,841 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7124835d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:45:29, skipping insertion in model container [2024-11-19 09:45:29,841 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:45:29" (3/3) ... [2024-11-19 09:45:29,843 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-nzb-file-symm.wvr.c [2024-11-19 09:45:29,862 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 09:45:29,863 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 38 error locations. [2024-11-19 09:45:29,863 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-19 09:45:29,963 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-19 09:45:30,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 113 places, 126 transitions, 266 flow [2024-11-19 09:45:30,067 INFO L124 PetriNetUnfolderBase]: 20/124 cut-off events. [2024-11-19 09:45:30,068 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-19 09:45:30,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133 conditions, 124 events. 20/124 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 391 event pairs, 0 based on Foata normal form. 0/66 useless extension candidates. Maximal degree in co-relation 107. Up to 2 conditions per place. [2024-11-19 09:45:30,073 INFO L82 GeneralOperation]: Start removeDead. Operand has 113 places, 126 transitions, 266 flow [2024-11-19 09:45:30,080 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 110 places, 123 transitions, 258 flow [2024-11-19 09:45:30,088 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 09:45:30,095 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;@19b4900a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 09:45:30,097 INFO L334 AbstractCegarLoop]: Starting to check reachability of 72 error locations. [2024-11-19 09:45:30,103 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-19 09:45:30,103 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-19 09:45:30,103 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-19 09:45:30,103 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:45:30,104 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-19 09:45:30,105 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-19 09:45:30,111 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:45:30,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1300439, now seen corresponding path program 1 times [2024-11-19 09:45:30,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:45:30,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397909181] [2024-11-19 09:45:30,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:45:30,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:45:30,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:45:30,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:45:30,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:45:30,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397909181] [2024-11-19 09:45:30,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397909181] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:45:30,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:45:30,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-19 09:45:30,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682485590] [2024-11-19 09:45:30,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:45:30,473 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:45:30,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:45:30,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:45:30,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:45:30,579 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 126 [2024-11-19 09:45:30,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 123 transitions, 258 flow. Second operand has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:45:30,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:45:30,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 126 [2024-11-19 09:45:30,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:45:31,239 INFO L124 PetriNetUnfolderBase]: 1446/3461 cut-off events. [2024-11-19 09:45:31,239 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2024-11-19 09:45:31,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5601 conditions, 3461 events. 1446/3461 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 25244 event pairs, 790 based on Foata normal form. 1/2625 useless extension candidates. Maximal degree in co-relation 5456. Up to 2083 conditions per place. [2024-11-19 09:45:31,274 INFO L140 encePairwiseOnDemand]: 119/126 looper letters, 56 selfloop transitions, 2 changer transitions 0/117 dead transitions. [2024-11-19 09:45:31,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 117 transitions, 362 flow [2024-11-19 09:45:31,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:45:31,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:45:31,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 249 transitions. [2024-11-19 09:45:31,290 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6587301587301587 [2024-11-19 09:45:31,292 INFO L175 Difference]: Start difference. First operand has 110 places, 123 transitions, 258 flow. Second operand 3 states and 249 transitions. [2024-11-19 09:45:31,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 117 transitions, 362 flow [2024-11-19 09:45:31,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 117 transitions, 354 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-19 09:45:31,302 INFO L231 Difference]: Finished difference. Result has 104 places, 117 transitions, 242 flow [2024-11-19 09:45:31,305 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=242, PETRI_PLACES=104, PETRI_TRANSITIONS=117} [2024-11-19 09:45:31,311 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, -6 predicate places. [2024-11-19 09:45:31,312 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 117 transitions, 242 flow [2024-11-19 09:45:31,312 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:45:31,312 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:45:31,313 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-19 09:45:31,313 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-19 09:45:31,314 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-19 09:45:31,314 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:45:31,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1300440, now seen corresponding path program 1 times [2024-11-19 09:45:31,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:45:31,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652361859] [2024-11-19 09:45:31,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:45:31,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:45:31,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:45:31,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:45:31,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:45:31,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652361859] [2024-11-19 09:45:31,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652361859] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:45:31,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:45:31,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:45:31,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274559536] [2024-11-19 09:45:31,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:45:31,554 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:45:31,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:45:31,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:45:31,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:45:31,623 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 126 [2024-11-19 09:45:31,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 117 transitions, 242 flow. Second operand has 4 states, 4 states have (on average 62.75) internal successors, (251), 4 states have internal predecessors, (251), 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) [2024-11-19 09:45:31,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:45:31,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 126 [2024-11-19 09:45:31,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:45:32,082 INFO L124 PetriNetUnfolderBase]: 1446/3465 cut-off events. [2024-11-19 09:45:32,082 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2024-11-19 09:45:32,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5580 conditions, 3465 events. 1446/3465 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 25213 event pairs, 790 based on Foata normal form. 1/2628 useless extension candidates. Maximal degree in co-relation 5549. Up to 2091 conditions per place. [2024-11-19 09:45:32,146 INFO L140 encePairwiseOnDemand]: 119/126 looper letters, 60 selfloop transitions, 4 changer transitions 0/121 dead transitions. [2024-11-19 09:45:32,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 121 transitions, 378 flow [2024-11-19 09:45:32,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:45:32,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:45:32,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 254 transitions. [2024-11-19 09:45:32,151 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.671957671957672 [2024-11-19 09:45:32,153 INFO L175 Difference]: Start difference. First operand has 104 places, 117 transitions, 242 flow. Second operand 3 states and 254 transitions. [2024-11-19 09:45:32,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 121 transitions, 378 flow [2024-11-19 09:45:32,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 121 transitions, 374 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:45:32,157 INFO L231 Difference]: Finished difference. Result has 105 places, 119 transitions, 264 flow [2024-11-19 09:45:32,158 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=264, PETRI_PLACES=105, PETRI_TRANSITIONS=119} [2024-11-19 09:45:32,159 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, -5 predicate places. [2024-11-19 09:45:32,159 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 119 transitions, 264 flow [2024-11-19 09:45:32,159 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 62.75) internal successors, (251), 4 states have internal predecessors, (251), 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) [2024-11-19 09:45:32,159 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:45:32,160 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-19 09:45:32,160 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-19 09:45:32,161 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-19 09:45:32,162 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:45:32,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1249764370, now seen corresponding path program 1 times [2024-11-19 09:45:32,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:45:32,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457907814] [2024-11-19 09:45:32,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:45:32,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:45:32,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:45:32,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:45:32,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:45:32,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457907814] [2024-11-19 09:45:32,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457907814] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:45:32,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138558237] [2024-11-19 09:45:32,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:45:32,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:45:32,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:45:32,458 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) [2024-11-19 09:45:32,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-19 09:45:32,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:45:32,556 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-19 09:45:32,560 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:45:32,615 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 [2024-11-19 09:45:32,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:45:32,672 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:45:32,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:45:32,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138558237] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:45:32,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:45:32,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-11-19 09:45:32,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872352455] [2024-11-19 09:45:32,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:45:32,740 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-19 09:45:32,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:45:32,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-19 09:45:32,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-11-19 09:45:32,987 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 126 [2024-11-19 09:45:32,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 119 transitions, 264 flow. Second operand has 9 states, 9 states have (on average 63.666666666666664) internal successors, (573), 9 states have internal predecessors, (573), 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) [2024-11-19 09:45:32,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:45:32,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 126 [2024-11-19 09:45:32,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:45:33,514 INFO L124 PetriNetUnfolderBase]: 1452/3483 cut-off events. [2024-11-19 09:45:33,515 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2024-11-19 09:45:33,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5638 conditions, 3483 events. 1452/3483 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 25257 event pairs, 790 based on Foata normal form. 0/2646 useless extension candidates. Maximal degree in co-relation 5584. Up to 2094 conditions per place. [2024-11-19 09:45:33,537 INFO L140 encePairwiseOnDemand]: 119/126 looper letters, 66 selfloop transitions, 16 changer transitions 0/139 dead transitions. [2024-11-19 09:45:33,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 139 transitions, 495 flow [2024-11-19 09:45:33,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 09:45:33,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 09:45:33,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 460 transitions. [2024-11-19 09:45:33,540 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6084656084656085 [2024-11-19 09:45:33,541 INFO L175 Difference]: Start difference. First operand has 105 places, 119 transitions, 264 flow. Second operand 6 states and 460 transitions. [2024-11-19 09:45:33,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 139 transitions, 495 flow [2024-11-19 09:45:33,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 139 transitions, 488 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 09:45:33,547 INFO L231 Difference]: Finished difference. Result has 112 places, 131 transitions, 376 flow [2024-11-19 09:45:33,547 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=376, PETRI_PLACES=112, PETRI_TRANSITIONS=131} [2024-11-19 09:45:33,548 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, 2 predicate places. [2024-11-19 09:45:33,548 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 131 transitions, 376 flow [2024-11-19 09:45:33,549 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 63.666666666666664) internal successors, (573), 9 states have internal predecessors, (573), 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) [2024-11-19 09:45:33,549 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:45:33,549 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-11-19 09:45:33,567 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-19 09:45:33,753 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:45:33,754 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-19 09:45:33,754 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:45:33,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1847960000, now seen corresponding path program 2 times [2024-11-19 09:45:33,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:45:33,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596359951] [2024-11-19 09:45:33,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:45:33,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:45:33,780 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:45:33,780 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:45:34,083 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:45:34,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:45:34,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596359951] [2024-11-19 09:45:34,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596359951] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:45:34,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984513356] [2024-11-19 09:45:34,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:45:34,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:45:34,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:45:34,086 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) [2024-11-19 09:45:34,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-19 09:45:34,183 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:45:34,183 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:45:34,184 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-19 09:45:34,187 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:45:34,196 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 [2024-11-19 09:45:34,347 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:45:34,347 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:45:34,492 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:45:34,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984513356] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:45:34,493 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:45:34,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2024-11-19 09:45:34,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049115099] [2024-11-19 09:45:34,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:45:34,494 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-19 09:45:34,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:45:34,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-19 09:45:34,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2024-11-19 09:45:35,514 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 126 [2024-11-19 09:45:35,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 131 transitions, 376 flow. Second operand has 18 states, 18 states have (on average 63.833333333333336) internal successors, (1149), 18 states have internal predecessors, (1149), 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) [2024-11-19 09:45:35,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:45:35,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 126 [2024-11-19 09:45:35,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:45:36,487 INFO L124 PetriNetUnfolderBase]: 1454/3487 cut-off events. [2024-11-19 09:45:36,487 INFO L125 PetriNetUnfolderBase]: For 61/61 co-relation queries the response was YES. [2024-11-19 09:45:36,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5684 conditions, 3487 events. 1454/3487 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 25304 event pairs, 790 based on Foata normal form. 4/2656 useless extension candidates. Maximal degree in co-relation 5603. Up to 2087 conditions per place. [2024-11-19 09:45:36,509 INFO L140 encePairwiseOnDemand]: 117/126 looper letters, 61 selfloop transitions, 25 changer transitions 0/143 dead transitions. [2024-11-19 09:45:36,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 143 transitions, 572 flow [2024-11-19 09:45:36,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 09:45:36,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-19 09:45:36,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 648 transitions. [2024-11-19 09:45:36,512 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-11-19 09:45:36,513 INFO L175 Difference]: Start difference. First operand has 112 places, 131 transitions, 376 flow. Second operand 9 states and 648 transitions. [2024-11-19 09:45:36,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 143 transitions, 572 flow [2024-11-19 09:45:36,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 143 transitions, 508 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-11-19 09:45:36,520 INFO L231 Difference]: Finished difference. Result has 114 places, 135 transitions, 382 flow [2024-11-19 09:45:36,522 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=382, PETRI_PLACES=114, PETRI_TRANSITIONS=135} [2024-11-19 09:45:36,523 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, 4 predicate places. [2024-11-19 09:45:36,524 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 135 transitions, 382 flow [2024-11-19 09:45:36,525 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 63.833333333333336) internal successors, (1149), 18 states have internal predecessors, (1149), 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) [2024-11-19 09:45:36,525 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:45:36,525 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:45:36,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-19 09:45:36,729 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-11-19 09:45:36,730 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-19 09:45:36,730 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:45:36,730 INFO L85 PathProgramCache]: Analyzing trace with hash 989591744, now seen corresponding path program 1 times [2024-11-19 09:45:36,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:45:36,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162554492] [2024-11-19 09:45:36,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:45:36,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:45:36,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:45:36,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:45:36,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:45:36,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162554492] [2024-11-19 09:45:36,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162554492] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:45:36,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200553490] [2024-11-19 09:45:36,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:45:36,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:45:36,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:45:36,839 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) [2024-11-19 09:45:36,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-19 09:45:36,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:45:36,939 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-19 09:45:36,941 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:45:36,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:45:36,972 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:45:36,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:45:36,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200553490] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:45:36,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:45:36,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2024-11-19 09:45:36,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128629801] [2024-11-19 09:45:36,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:45:36,990 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-19 09:45:36,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:45:36,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-19 09:45:36,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-11-19 09:45:37,004 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 126 [2024-11-19 09:45:37,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 135 transitions, 382 flow. Second operand has 8 states, 8 states have (on average 66.5) internal successors, (532), 8 states have internal predecessors, (532), 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) [2024-11-19 09:45:37,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:45:37,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 126 [2024-11-19 09:45:37,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:45:37,460 INFO L124 PetriNetUnfolderBase]: 1448/3481 cut-off events. [2024-11-19 09:45:37,460 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-11-19 09:45:37,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5662 conditions, 3481 events. 1448/3481 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 25175 event pairs, 790 based on Foata normal form. 6/2652 useless extension candidates. Maximal degree in co-relation 5557. Up to 2090 conditions per place. [2024-11-19 09:45:37,486 INFO L140 encePairwiseOnDemand]: 119/126 looper letters, 61 selfloop transitions, 19 changer transitions 0/137 dead transitions. [2024-11-19 09:45:37,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 137 transitions, 538 flow [2024-11-19 09:45:37,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 09:45:37,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 09:45:37,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 462 transitions. [2024-11-19 09:45:37,488 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-11-19 09:45:37,488 INFO L175 Difference]: Start difference. First operand has 114 places, 135 transitions, 382 flow. Second operand 6 states and 462 transitions. [2024-11-19 09:45:37,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 137 transitions, 538 flow [2024-11-19 09:45:37,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 137 transitions, 501 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-11-19 09:45:37,492 INFO L231 Difference]: Finished difference. Result has 114 places, 131 transitions, 372 flow [2024-11-19 09:45:37,492 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=372, PETRI_PLACES=114, PETRI_TRANSITIONS=131} [2024-11-19 09:45:37,493 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, 4 predicate places. [2024-11-19 09:45:37,493 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 131 transitions, 372 flow [2024-11-19 09:45:37,494 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 66.5) internal successors, (532), 8 states have internal predecessors, (532), 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) [2024-11-19 09:45:37,494 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:45:37,494 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:45:37,512 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-19 09:45:37,694 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:45:37,695 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-19 09:45:37,695 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:45:37,696 INFO L85 PathProgramCache]: Analyzing trace with hash 610411437, now seen corresponding path program 2 times [2024-11-19 09:45:37,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:45:37,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217159617] [2024-11-19 09:45:37,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:45:37,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:45:37,727 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-19 09:45:37,727 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:45:37,934 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-19 09:45:37,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:45:37,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217159617] [2024-11-19 09:45:37,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217159617] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:45:37,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:45:37,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:45:37,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469893924] [2024-11-19 09:45:37,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:45:37,936 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:45:37,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:45:37,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:45:37,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:45:38,139 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 126 [2024-11-19 09:45:38,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 131 transitions, 372 flow. Second operand has 5 states, 5 states have (on average 60.6) internal successors, (303), 5 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:45:38,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:45:38,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 126 [2024-11-19 09:45:38,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:45:38,936 INFO L124 PetriNetUnfolderBase]: 3173/6790 cut-off events. [2024-11-19 09:45:38,937 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-11-19 09:45:38,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11550 conditions, 6790 events. 3173/6790 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 48080 event pairs, 1228 based on Foata normal form. 0/5448 useless extension candidates. Maximal degree in co-relation 11429. Up to 2561 conditions per place. [2024-11-19 09:45:38,975 INFO L140 encePairwiseOnDemand]: 117/126 looper letters, 118 selfloop transitions, 7 changer transitions 0/178 dead transitions. [2024-11-19 09:45:38,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 178 transitions, 719 flow [2024-11-19 09:45:38,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 09:45:38,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 09:45:39,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 461 transitions. [2024-11-19 09:45:39,028 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6097883597883598 [2024-11-19 09:45:39,028 INFO L175 Difference]: Start difference. First operand has 114 places, 131 transitions, 372 flow. Second operand 6 states and 461 transitions. [2024-11-19 09:45:39,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 178 transitions, 719 flow [2024-11-19 09:45:39,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 178 transitions, 702 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-19 09:45:39,034 INFO L231 Difference]: Finished difference. Result has 117 places, 132 transitions, 383 flow [2024-11-19 09:45:39,035 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=355, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=383, PETRI_PLACES=117, PETRI_TRANSITIONS=132} [2024-11-19 09:45:39,035 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, 7 predicate places. [2024-11-19 09:45:39,037 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 132 transitions, 383 flow [2024-11-19 09:45:39,037 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 60.6) internal successors, (303), 5 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:45:39,037 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:45:39,037 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:45:39,038 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-19 09:45:39,038 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-19 09:45:39,038 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:45:39,038 INFO L85 PathProgramCache]: Analyzing trace with hash 610411436, now seen corresponding path program 1 times [2024-11-19 09:45:39,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:45:39,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111015302] [2024-11-19 09:45:39,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:45:39,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:45:39,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:45:39,221 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-19 09:45:39,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:45:39,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111015302] [2024-11-19 09:45:39,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111015302] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:45:39,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787383641] [2024-11-19 09:45:39,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:45:39,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:45:39,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:45:39,225 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) [2024-11-19 09:45:39,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-19 09:45:39,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:45:39,335 INFO L255 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 09:45:39,337 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:45:39,407 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-19 09:45:39,407 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:45:39,454 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-19 09:45:39,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787383641] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:45:39,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:45:39,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-19 09:45:39,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45487431] [2024-11-19 09:45:39,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:45:39,455 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-19 09:45:39,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:45:39,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-19 09:45:39,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2024-11-19 09:45:39,483 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 126 [2024-11-19 09:45:39,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 132 transitions, 383 flow. Second operand has 13 states, 13 states have (on average 66.38461538461539) internal successors, (863), 13 states have internal predecessors, (863), 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) [2024-11-19 09:45:39,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:45:39,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 126 [2024-11-19 09:45:39,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:45:40,293 INFO L124 PetriNetUnfolderBase]: 2758/6505 cut-off events. [2024-11-19 09:45:40,294 INFO L125 PetriNetUnfolderBase]: For 204/204 co-relation queries the response was YES. [2024-11-19 09:45:40,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10886 conditions, 6505 events. 2758/6505 cut-off events. For 204/204 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 49163 event pairs, 1536 based on Foata normal form. 2/5159 useless extension candidates. Maximal degree in co-relation 10779. Up to 3986 conditions per place. [2024-11-19 09:45:40,333 INFO L140 encePairwiseOnDemand]: 119/126 looper letters, 63 selfloop transitions, 16 changer transitions 0/136 dead transitions. [2024-11-19 09:45:40,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 136 transitions, 552 flow [2024-11-19 09:45:40,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-19 09:45:40,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-19 09:45:40,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 592 transitions. [2024-11-19 09:45:40,336 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-11-19 09:45:40,336 INFO L175 Difference]: Start difference. First operand has 117 places, 132 transitions, 383 flow. Second operand 8 states and 592 transitions. [2024-11-19 09:45:40,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 136 transitions, 552 flow [2024-11-19 09:45:40,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 136 transitions, 544 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-19 09:45:40,341 INFO L231 Difference]: Finished difference. Result has 120 places, 130 transitions, 394 flow [2024-11-19 09:45:40,341 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=394, PETRI_PLACES=120, PETRI_TRANSITIONS=130} [2024-11-19 09:45:40,342 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, 10 predicate places. [2024-11-19 09:45:40,342 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 130 transitions, 394 flow [2024-11-19 09:45:40,343 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 66.38461538461539) internal successors, (863), 13 states have internal predecessors, (863), 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) [2024-11-19 09:45:40,344 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:45:40,344 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:45:40,362 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-19 09:45:40,544 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:45:40,545 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-19 09:45:40,545 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:45:40,545 INFO L85 PathProgramCache]: Analyzing trace with hash -820950917, now seen corresponding path program 2 times [2024-11-19 09:45:40,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:45:40,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952412987] [2024-11-19 09:45:40,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:45:40,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:45:40,569 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-19 09:45:40,570 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:45:40,650 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-19 09:45:40,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:45:40,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952412987] [2024-11-19 09:45:40,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952412987] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:45:40,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:45:40,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:45:40,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258803451] [2024-11-19 09:45:40,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:45:40,654 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:45:40,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:45:40,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:45:40,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:45:40,734 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 126 [2024-11-19 09:45:40,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 130 transitions, 394 flow. Second operand has 4 states, 4 states have (on average 57.25) internal successors, (229), 4 states have internal predecessors, (229), 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) [2024-11-19 09:45:40,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:45:40,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 126 [2024-11-19 09:45:40,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:45:41,395 INFO L124 PetriNetUnfolderBase]: 2758/6143 cut-off events. [2024-11-19 09:45:41,396 INFO L125 PetriNetUnfolderBase]: For 154/154 co-relation queries the response was YES. [2024-11-19 09:45:41,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10481 conditions, 6143 events. 2758/6143 cut-off events. For 154/154 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 43884 event pairs, 1536 based on Foata normal form. 0/5000 useless extension candidates. Maximal degree in co-relation 10360. Up to 3981 conditions per place. [2024-11-19 09:45:41,429 INFO L140 encePairwiseOnDemand]: 115/126 looper letters, 70 selfloop transitions, 3 changer transitions 0/122 dead transitions. [2024-11-19 09:45:41,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 122 transitions, 524 flow [2024-11-19 09:45:41,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:45:41,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:45:41,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 336 transitions. [2024-11-19 09:45:41,431 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-11-19 09:45:41,431 INFO L175 Difference]: Start difference. First operand has 120 places, 130 transitions, 394 flow. Second operand 5 states and 336 transitions. [2024-11-19 09:45:41,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 122 transitions, 524 flow [2024-11-19 09:45:41,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 122 transitions, 492 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-11-19 09:45:41,434 INFO L231 Difference]: Finished difference. Result has 109 places, 122 transitions, 352 flow [2024-11-19 09:45:41,434 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=352, PETRI_PLACES=109, PETRI_TRANSITIONS=122} [2024-11-19 09:45:41,436 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, -1 predicate places. [2024-11-19 09:45:41,437 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 122 transitions, 352 flow [2024-11-19 09:45:41,437 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 57.25) internal successors, (229), 4 states have internal predecessors, (229), 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) [2024-11-19 09:45:41,437 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:45:41,437 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:45:41,437 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-19 09:45:41,437 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-19 09:45:41,437 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:45:41,437 INFO L85 PathProgramCache]: Analyzing trace with hash 612564799, now seen corresponding path program 1 times [2024-11-19 09:45:41,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:45:41,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398164146] [2024-11-19 09:45:41,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:45:41,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:45:41,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:45:41,893 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-19 09:45:41,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:45:41,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398164146] [2024-11-19 09:45:41,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398164146] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:45:41,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850877730] [2024-11-19 09:45:41,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:45:41,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:45:41,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:45:41,896 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) [2024-11-19 09:45:41,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-19 09:45:42,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:45:42,029 INFO L255 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-19 09:45:42,031 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:45:42,196 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-19 09:45:42,197 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:45:42,285 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 20 treesize of output 16 [2024-11-19 09:45:42,409 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-19 09:45:42,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850877730] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:45:42,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:45:42,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 21 [2024-11-19 09:45:42,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946374512] [2024-11-19 09:45:42,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:45:42,411 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-19 09:45:42,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:45:42,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-19 09:45:42,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2024-11-19 09:45:43,445 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 126 [2024-11-19 09:45:43,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 122 transitions, 352 flow. Second operand has 22 states, 22 states have (on average 62.59090909090909) internal successors, (1377), 22 states have internal predecessors, (1377), 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) [2024-11-19 09:45:43,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:45:43,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 126 [2024-11-19 09:45:43,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:45:45,232 INFO L124 PetriNetUnfolderBase]: 6337/12780 cut-off events. [2024-11-19 09:45:45,232 INFO L125 PetriNetUnfolderBase]: For 367/367 co-relation queries the response was YES. [2024-11-19 09:45:45,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22578 conditions, 12780 events. 6337/12780 cut-off events. For 367/367 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 93671 event pairs, 1161 based on Foata normal form. 0/11150 useless extension candidates. Maximal degree in co-relation 22471. Up to 3752 conditions per place. [2024-11-19 09:45:45,385 INFO L140 encePairwiseOnDemand]: 114/126 looper letters, 144 selfloop transitions, 15 changer transitions 0/204 dead transitions. [2024-11-19 09:45:45,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 204 transitions, 862 flow [2024-11-19 09:45:45,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-19 09:45:45,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-19 09:45:45,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 760 transitions. [2024-11-19 09:45:45,388 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6031746031746031 [2024-11-19 09:45:45,388 INFO L175 Difference]: Start difference. First operand has 109 places, 122 transitions, 352 flow. Second operand 10 states and 760 transitions. [2024-11-19 09:45:45,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 204 transitions, 862 flow [2024-11-19 09:45:45,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 204 transitions, 857 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-19 09:45:45,392 INFO L231 Difference]: Finished difference. Result has 115 places, 121 transitions, 390 flow [2024-11-19 09:45:45,392 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=390, PETRI_PLACES=115, PETRI_TRANSITIONS=121} [2024-11-19 09:45:45,393 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, 5 predicate places. [2024-11-19 09:45:45,393 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 121 transitions, 390 flow [2024-11-19 09:45:45,394 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 62.59090909090909) internal successors, (1377), 22 states have internal predecessors, (1377), 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) [2024-11-19 09:45:45,394 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:45:45,394 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:45:45,412 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-19 09:45:45,594 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:45:45,595 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-19 09:45:45,596 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:45:45,596 INFO L85 PathProgramCache]: Analyzing trace with hash 612564798, now seen corresponding path program 1 times [2024-11-19 09:45:45,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:45:45,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460357770] [2024-11-19 09:45:45,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:45:45,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:45:45,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:45:45,754 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-11-19 09:45:45,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:45:45,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460357770] [2024-11-19 09:45:45,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460357770] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:45:45,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:45:45,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:45:45,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611420564] [2024-11-19 09:45:45,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:45:45,755 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:45:45,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:45:45,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:45:45,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:45:45,829 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 126 [2024-11-19 09:45:45,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 121 transitions, 390 flow. Second operand has 4 states, 4 states have (on average 58.25) internal successors, (233), 4 states have internal predecessors, (233), 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) [2024-11-19 09:45:45,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:45:45,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 126 [2024-11-19 09:45:45,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:45:46,713 INFO L124 PetriNetUnfolderBase]: 6201/11906 cut-off events. [2024-11-19 09:45:46,714 INFO L125 PetriNetUnfolderBase]: For 1271/1291 co-relation queries the response was YES. [2024-11-19 09:45:46,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22510 conditions, 11906 events. 6201/11906 cut-off events. For 1271/1291 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 81826 event pairs, 3811 based on Foata normal form. 224/10730 useless extension candidates. Maximal degree in co-relation 22392. Up to 9068 conditions per place. [2024-11-19 09:45:46,773 INFO L140 encePairwiseOnDemand]: 116/126 looper letters, 73 selfloop transitions, 2 changer transitions 0/113 dead transitions. [2024-11-19 09:45:46,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 113 transitions, 524 flow [2024-11-19 09:45:46,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:45:46,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:45:46,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 282 transitions. [2024-11-19 09:45:46,775 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-11-19 09:45:46,775 INFO L175 Difference]: Start difference. First operand has 115 places, 121 transitions, 390 flow. Second operand 4 states and 282 transitions. [2024-11-19 09:45:46,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 113 transitions, 524 flow [2024-11-19 09:45:46,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 113 transitions, 503 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-19 09:45:46,780 INFO L231 Difference]: Finished difference. Result has 104 places, 113 transitions, 357 flow [2024-11-19 09:45:46,780 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=357, PETRI_PLACES=104, PETRI_TRANSITIONS=113} [2024-11-19 09:45:46,781 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, -6 predicate places. [2024-11-19 09:45:46,782 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 113 transitions, 357 flow [2024-11-19 09:45:46,783 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.25) internal successors, (233), 4 states have internal predecessors, (233), 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) [2024-11-19 09:45:46,783 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:45:46,783 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:45:46,783 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-19 09:45:46,783 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-19 09:45:46,783 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:45:46,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1340197152, now seen corresponding path program 1 times [2024-11-19 09:45:46,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:45:46,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29059799] [2024-11-19 09:45:46,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:45:46,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:45:46,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:45:47,184 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-19 09:45:47,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:45:47,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29059799] [2024-11-19 09:45:47,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29059799] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:45:47,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075415123] [2024-11-19 09:45:47,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:45:47,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:45:47,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:45:47,187 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) [2024-11-19 09:45:47,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-19 09:45:47,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:45:47,331 INFO L255 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-19 09:45:47,333 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:45:47,516 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-19 09:45:47,517 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:45:47,607 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 20 treesize of output 16 [2024-11-19 09:45:47,720 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-19 09:45:47,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075415123] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:45:47,721 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:45:47,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 21 [2024-11-19 09:45:47,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368622750] [2024-11-19 09:45:47,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:45:47,722 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-19 09:45:47,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:45:47,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-19 09:45:47,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2024-11-19 09:45:48,483 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 126 [2024-11-19 09:45:48,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 113 transitions, 357 flow. Second operand has 22 states, 22 states have (on average 62.45454545454545) internal successors, (1374), 22 states have internal predecessors, (1374), 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) [2024-11-19 09:45:48,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:45:48,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 126 [2024-11-19 09:45:48,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:45:50,444 INFO L124 PetriNetUnfolderBase]: 9460/18103 cut-off events. [2024-11-19 09:45:50,445 INFO L125 PetriNetUnfolderBase]: For 2107/2185 co-relation queries the response was YES. [2024-11-19 09:45:50,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34549 conditions, 18103 events. 9460/18103 cut-off events. For 2107/2185 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 129804 event pairs, 2682 based on Foata normal form. 0/15485 useless extension candidates. Maximal degree in co-relation 34440. Up to 5035 conditions per place. [2024-11-19 09:45:50,535 INFO L140 encePairwiseOnDemand]: 111/126 looper letters, 164 selfloop transitions, 18 changer transitions 0/216 dead transitions. [2024-11-19 09:45:50,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 216 transitions, 983 flow [2024-11-19 09:45:50,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-19 09:45:50,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-19 09:45:50,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 780 transitions. [2024-11-19 09:45:50,538 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-11-19 09:45:50,538 INFO L175 Difference]: Start difference. First operand has 104 places, 113 transitions, 357 flow. Second operand 10 states and 780 transitions. [2024-11-19 09:45:50,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 216 transitions, 983 flow [2024-11-19 09:45:50,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 216 transitions, 980 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:45:50,546 INFO L231 Difference]: Finished difference. Result has 114 places, 118 transitions, 443 flow [2024-11-19 09:45:50,546 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=443, PETRI_PLACES=114, PETRI_TRANSITIONS=118} [2024-11-19 09:45:50,547 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, 4 predicate places. [2024-11-19 09:45:50,547 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 118 transitions, 443 flow [2024-11-19 09:45:50,548 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 62.45454545454545) internal successors, (1374), 22 states have internal predecessors, (1374), 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) [2024-11-19 09:45:50,548 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:45:50,548 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:45:50,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-19 09:45:50,749 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:45:50,749 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-19 09:45:50,749 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:45:50,750 INFO L85 PathProgramCache]: Analyzing trace with hash 264298883, now seen corresponding path program 1 times [2024-11-19 09:45:50,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:45:50,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461635368] [2024-11-19 09:45:50,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:45:50,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:45:50,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:45:51,175 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-19 09:45:51,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:45:51,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461635368] [2024-11-19 09:45:51,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461635368] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:45:51,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093464264] [2024-11-19 09:45:51,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:45:51,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:45:51,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:45:51,178 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) [2024-11-19 09:45:51,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-19 09:45:51,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:45:51,325 INFO L255 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-11-19 09:45:51,327 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:45:51,336 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 [2024-11-19 09:45:51,495 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-19 09:45:51,496 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 12 treesize of output 14 [2024-11-19 09:45:51,836 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:45:51,836 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:45:52,216 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-19 09:45:52,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093464264] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 09:45:52,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-19 09:45:52,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5, 14] total 27 [2024-11-19 09:45:52,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588167846] [2024-11-19 09:45:52,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:45:52,218 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-19 09:45:52,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:45:52,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-19 09:45:52,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=621, Unknown=0, NotChecked=0, Total=812 [2024-11-19 09:45:52,649 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 126 [2024-11-19 09:45:52,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 118 transitions, 443 flow. Second operand has 10 states, 10 states have (on average 62.4) internal successors, (624), 10 states have internal predecessors, (624), 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) [2024-11-19 09:45:52,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:45:52,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 126 [2024-11-19 09:45:52,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:45:54,365 INFO L124 PetriNetUnfolderBase]: 11439/20901 cut-off events. [2024-11-19 09:45:54,365 INFO L125 PetriNetUnfolderBase]: For 6522/6892 co-relation queries the response was YES. [2024-11-19 09:45:54,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42476 conditions, 20901 events. 11439/20901 cut-off events. For 6522/6892 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 148162 event pairs, 4244 based on Foata normal form. 0/17845 useless extension candidates. Maximal degree in co-relation 42355. Up to 8345 conditions per place. [2024-11-19 09:45:54,447 INFO L140 encePairwiseOnDemand]: 113/126 looper letters, 125 selfloop transitions, 10 changer transitions 0/169 dead transitions. [2024-11-19 09:45:54,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 169 transitions, 869 flow [2024-11-19 09:45:54,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 09:45:54,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 09:45:54,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 471 transitions. [2024-11-19 09:45:54,449 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.623015873015873 [2024-11-19 09:45:54,449 INFO L175 Difference]: Start difference. First operand has 114 places, 118 transitions, 443 flow. Second operand 6 states and 471 transitions. [2024-11-19 09:45:54,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 169 transitions, 869 flow [2024-11-19 09:45:54,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 169 transitions, 844 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-11-19 09:45:54,459 INFO L231 Difference]: Finished difference. Result has 114 places, 123 transitions, 487 flow [2024-11-19 09:45:54,459 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=420, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=487, PETRI_PLACES=114, PETRI_TRANSITIONS=123} [2024-11-19 09:45:54,459 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, 4 predicate places. [2024-11-19 09:45:54,460 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 123 transitions, 487 flow [2024-11-19 09:45:54,460 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 62.4) internal successors, (624), 10 states have internal predecessors, (624), 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) [2024-11-19 09:45:54,460 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:45:54,460 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:45:54,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-19 09:45:54,661 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:45:54,661 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-19 09:45:54,661 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:45:54,662 INFO L85 PathProgramCache]: Analyzing trace with hash 996480192, now seen corresponding path program 1 times [2024-11-19 09:45:54,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:45:54,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802826524] [2024-11-19 09:45:54,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:45:54,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:45:54,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:45:55,473 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-19 09:45:55,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:45:55,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802826524] [2024-11-19 09:45:55,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802826524] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:45:55,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:45:55,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 09:45:55,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800261976] [2024-11-19 09:45:55,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:45:55,475 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:45:55,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:45:55,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:45:55,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:45:55,476 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 126 [2024-11-19 09:45:55,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 123 transitions, 487 flow. Second operand has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 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) [2024-11-19 09:45:55,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:45:55,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 126 [2024-11-19 09:45:55,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:45:57,542 INFO L124 PetriNetUnfolderBase]: 11074/20733 cut-off events. [2024-11-19 09:45:57,542 INFO L125 PetriNetUnfolderBase]: For 10685/11047 co-relation queries the response was YES. [2024-11-19 09:45:57,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44806 conditions, 20733 events. 11074/20733 cut-off events. For 10685/11047 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 149486 event pairs, 6581 based on Foata normal form. 1/18208 useless extension candidates. Maximal degree in co-relation 44691. Up to 15449 conditions per place. [2024-11-19 09:45:57,654 INFO L140 encePairwiseOnDemand]: 123/126 looper letters, 119 selfloop transitions, 1 changer transitions 6/164 dead transitions. [2024-11-19 09:45:57,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 164 transitions, 886 flow [2024-11-19 09:45:57,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:45:57,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:45:57,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 349 transitions. [2024-11-19 09:45:57,656 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6924603174603174 [2024-11-19 09:45:57,656 INFO L175 Difference]: Start difference. First operand has 114 places, 123 transitions, 487 flow. Second operand 4 states and 349 transitions. [2024-11-19 09:45:57,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 164 transitions, 886 flow [2024-11-19 09:45:57,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 164 transitions, 881 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-19 09:45:57,670 INFO L231 Difference]: Finished difference. Result has 116 places, 123 transitions, 489 flow [2024-11-19 09:45:57,670 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=482, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=489, PETRI_PLACES=116, PETRI_TRANSITIONS=123} [2024-11-19 09:45:57,671 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, 6 predicate places. [2024-11-19 09:45:57,672 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 123 transitions, 489 flow [2024-11-19 09:45:57,672 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 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) [2024-11-19 09:45:57,672 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:45:57,672 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:45:57,672 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-19 09:45:57,672 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-19 09:45:57,673 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:45:57,673 INFO L85 PathProgramCache]: Analyzing trace with hash -635832396, now seen corresponding path program 2 times [2024-11-19 09:45:57,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:45:57,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339508037] [2024-11-19 09:45:57,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:45:57,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:45:57,709 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-19 09:45:57,713 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:45:58,245 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-19 09:45:58,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:45:58,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339508037] [2024-11-19 09:45:58,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339508037] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:45:58,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:45:58,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 09:45:58,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675975302] [2024-11-19 09:45:58,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:45:58,247 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:45:58,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:45:58,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:45:58,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:45:58,248 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 126 [2024-11-19 09:45:58,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 123 transitions, 489 flow. Second operand has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 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) [2024-11-19 09:45:58,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:45:58,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 126 [2024-11-19 09:45:58,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:46:02,074 INFO L124 PetriNetUnfolderBase]: 20178/37087 cut-off events. [2024-11-19 09:46:02,074 INFO L125 PetriNetUnfolderBase]: For 19688/20489 co-relation queries the response was YES. [2024-11-19 09:46:02,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81362 conditions, 37087 events. 20178/37087 cut-off events. For 19688/20489 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 292261 event pairs, 5702 based on Foata normal form. 1/33012 useless extension candidates. Maximal degree in co-relation 81262. Up to 15481 conditions per place. [2024-11-19 09:46:02,315 INFO L140 encePairwiseOnDemand]: 117/126 looper letters, 147 selfloop transitions, 10 changer transitions 2/197 dead transitions. [2024-11-19 09:46:02,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 197 transitions, 1073 flow [2024-11-19 09:46:02,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:46:02,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:46:02,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 377 transitions. [2024-11-19 09:46:02,317 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.748015873015873 [2024-11-19 09:46:02,317 INFO L175 Difference]: Start difference. First operand has 116 places, 123 transitions, 489 flow. Second operand 4 states and 377 transitions. [2024-11-19 09:46:02,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 197 transitions, 1073 flow [2024-11-19 09:46:02,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 197 transitions, 1067 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-11-19 09:46:02,346 INFO L231 Difference]: Finished difference. Result has 119 places, 133 transitions, 581 flow [2024-11-19 09:46:02,346 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=486, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=581, PETRI_PLACES=119, PETRI_TRANSITIONS=133} [2024-11-19 09:46:02,347 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, 9 predicate places. [2024-11-19 09:46:02,347 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 133 transitions, 581 flow [2024-11-19 09:46:02,347 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 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) [2024-11-19 09:46:02,348 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:46:02,348 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:46:02,348 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-19 09:46:02,348 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-19 09:46:02,348 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:46:02,348 INFO L85 PathProgramCache]: Analyzing trace with hash -612142141, now seen corresponding path program 1 times [2024-11-19 09:46:02,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:46:02,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26323389] [2024-11-19 09:46:02,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:46:02,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:46:02,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:46:02,463 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-19 09:46:02,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:46:02,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26323389] [2024-11-19 09:46:02,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26323389] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:46:02,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:46:02,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:46:02,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999127857] [2024-11-19 09:46:02,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:46:02,465 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:46:02,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:46:02,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:46:02,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:46:02,467 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 126 [2024-11-19 09:46:02,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 133 transitions, 581 flow. Second operand has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:46:02,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:46:02,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 126 [2024-11-19 09:46:02,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:46:06,261 INFO L124 PetriNetUnfolderBase]: 19276/36646 cut-off events. [2024-11-19 09:46:06,261 INFO L125 PetriNetUnfolderBase]: For 25452/26319 co-relation queries the response was YES. [2024-11-19 09:46:06,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83383 conditions, 36646 events. 19276/36646 cut-off events. For 25452/26319 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 297556 event pairs, 6374 based on Foata normal form. 159/32075 useless extension candidates. Maximal degree in co-relation 83267. Up to 28009 conditions per place. [2024-11-19 09:46:06,499 INFO L140 encePairwiseOnDemand]: 122/126 looper letters, 98 selfloop transitions, 3 changer transitions 2/141 dead transitions. [2024-11-19 09:46:06,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 141 transitions, 810 flow [2024-11-19 09:46:06,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:46:06,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:46:06,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 263 transitions. [2024-11-19 09:46:06,501 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6957671957671958 [2024-11-19 09:46:06,501 INFO L175 Difference]: Start difference. First operand has 119 places, 133 transitions, 581 flow. Second operand 3 states and 263 transitions. [2024-11-19 09:46:06,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 141 transitions, 810 flow [2024-11-19 09:46:06,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 141 transitions, 810 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-19 09:46:06,520 INFO L231 Difference]: Finished difference. Result has 123 places, 131 transitions, 593 flow [2024-11-19 09:46:06,521 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=563, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=593, PETRI_PLACES=123, PETRI_TRANSITIONS=131} [2024-11-19 09:46:06,521 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, 13 predicate places. [2024-11-19 09:46:06,521 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 131 transitions, 593 flow [2024-11-19 09:46:06,522 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:46:06,522 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:46:06,522 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:46:06,522 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-19 09:46:06,522 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-19 09:46:06,522 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:46:06,523 INFO L85 PathProgramCache]: Analyzing trace with hash 307697650, now seen corresponding path program 1 times [2024-11-19 09:46:06,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:46:06,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860733807] [2024-11-19 09:46:06,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:46:06,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:46:06,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:46:06,608 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-19 09:46:06,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:46:06,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860733807] [2024-11-19 09:46:06,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860733807] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:46:06,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:46:06,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:46:06,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233889136] [2024-11-19 09:46:06,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:46:06,609 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:46:06,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:46:06,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:46:06,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:46:06,610 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 126 [2024-11-19 09:46:06,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 131 transitions, 593 flow. Second operand has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:46:06,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:46:06,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 126 [2024-11-19 09:46:06,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:46:10,218 INFO L124 PetriNetUnfolderBase]: 18978/35938 cut-off events. [2024-11-19 09:46:10,218 INFO L125 PetriNetUnfolderBase]: For 25310/26177 co-relation queries the response was YES. [2024-11-19 09:46:10,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81964 conditions, 35938 events. 18978/35938 cut-off events. For 25310/26177 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 290229 event pairs, 10766 based on Foata normal form. 9/31317 useless extension candidates. Maximal degree in co-relation 81873. Up to 27566 conditions per place. [2024-11-19 09:46:10,451 INFO L140 encePairwiseOnDemand]: 122/126 looper letters, 90 selfloop transitions, 0 changer transitions 10/138 dead transitions. [2024-11-19 09:46:10,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 138 transitions, 798 flow [2024-11-19 09:46:10,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:46:10,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:46:10,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 260 transitions. [2024-11-19 09:46:10,453 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6878306878306878 [2024-11-19 09:46:10,453 INFO L175 Difference]: Start difference. First operand has 123 places, 131 transitions, 593 flow. Second operand 3 states and 260 transitions. [2024-11-19 09:46:10,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 138 transitions, 798 flow [2024-11-19 09:46:10,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 138 transitions, 786 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-11-19 09:46:10,471 INFO L231 Difference]: Finished difference. Result has 122 places, 128 transitions, 555 flow [2024-11-19 09:46:10,472 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=568, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=555, PETRI_PLACES=122, PETRI_TRANSITIONS=128} [2024-11-19 09:46:10,472 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, 12 predicate places. [2024-11-19 09:46:10,472 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 128 transitions, 555 flow [2024-11-19 09:46:10,473 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:46:10,473 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:46:10,473 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:46:10,473 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-19 09:46:10,473 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-19 09:46:10,474 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:46:10,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1365374999, now seen corresponding path program 1 times [2024-11-19 09:46:10,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:46:10,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907454972] [2024-11-19 09:46:10,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:46:10,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:46:10,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:46:10,615 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-19 09:46:10,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:46:10,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907454972] [2024-11-19 09:46:10,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907454972] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:46:10,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:46:10,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:46:10,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710965602] [2024-11-19 09:46:10,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:46:10,616 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:46:10,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:46:10,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:46:10,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:46:10,635 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 126 [2024-11-19 09:46:10,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 128 transitions, 555 flow. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 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) [2024-11-19 09:46:10,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:46:10,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 126 [2024-11-19 09:46:10,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:46:14,044 INFO L124 PetriNetUnfolderBase]: 18278/35505 cut-off events. [2024-11-19 09:46:14,045 INFO L125 PetriNetUnfolderBase]: For 23294/24138 co-relation queries the response was YES. [2024-11-19 09:46:14,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81008 conditions, 35505 events. 18278/35505 cut-off events. For 23294/24138 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 296226 event pairs, 9326 based on Foata normal form. 200/31258 useless extension candidates. Maximal degree in co-relation 80989. Up to 22270 conditions per place. [2024-11-19 09:46:14,227 INFO L140 encePairwiseOnDemand]: 123/126 looper letters, 130 selfloop transitions, 4 changer transitions 0/172 dead transitions. [2024-11-19 09:46:14,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 172 transitions, 998 flow [2024-11-19 09:46:14,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:46:14,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:46:14,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 282 transitions. [2024-11-19 09:46:14,229 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.746031746031746 [2024-11-19 09:46:14,229 INFO L175 Difference]: Start difference. First operand has 122 places, 128 transitions, 555 flow. Second operand 3 states and 282 transitions. [2024-11-19 09:46:14,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 172 transitions, 998 flow [2024-11-19 09:46:14,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 172 transitions, 994 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-11-19 09:46:14,245 INFO L231 Difference]: Finished difference. Result has 122 places, 129 transitions, 569 flow [2024-11-19 09:46:14,246 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=551, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=569, PETRI_PLACES=122, PETRI_TRANSITIONS=129} [2024-11-19 09:46:14,246 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, 12 predicate places. [2024-11-19 09:46:14,246 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 129 transitions, 569 flow [2024-11-19 09:46:14,246 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 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) [2024-11-19 09:46:14,246 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:46:14,246 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:46:14,247 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-19 09:46:14,247 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-19 09:46:14,247 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:46:14,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1185376447, now seen corresponding path program 1 times [2024-11-19 09:46:14,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:46:14,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219125458] [2024-11-19 09:46:14,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:46:14,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:46:14,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:46:14,451 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-19 09:46:14,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:46:14,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219125458] [2024-11-19 09:46:14,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219125458] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:46:14,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:46:14,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-19 09:46:14,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538597857] [2024-11-19 09:46:14,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:46:14,452 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 09:46:14,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:46:14,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 09:46:14,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-11-19 09:46:14,457 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 126 [2024-11-19 09:46:14,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 129 transitions, 569 flow. Second operand has 6 states, 6 states have (on average 64.0) internal successors, (384), 6 states have internal predecessors, (384), 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) [2024-11-19 09:46:14,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:46:14,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 126 [2024-11-19 09:46:14,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:46:19,700 INFO L124 PetriNetUnfolderBase]: 27446/48255 cut-off events. [2024-11-19 09:46:19,700 INFO L125 PetriNetUnfolderBase]: For 33451/34901 co-relation queries the response was YES. [2024-11-19 09:46:19,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117554 conditions, 48255 events. 27446/48255 cut-off events. For 33451/34901 co-relation queries the response was YES. Maximal size of possible extension queue 667. Compared 382648 event pairs, 10864 based on Foata normal form. 0/43456 useless extension candidates. Maximal degree in co-relation 117534. Up to 26102 conditions per place. [2024-11-19 09:46:20,060 INFO L140 encePairwiseOnDemand]: 119/126 looper letters, 237 selfloop transitions, 8 changer transitions 0/278 dead transitions. [2024-11-19 09:46:20,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 278 transitions, 1696 flow [2024-11-19 09:46:20,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 09:46:20,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 09:46:20,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 528 transitions. [2024-11-19 09:46:20,062 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6984126984126984 [2024-11-19 09:46:20,062 INFO L175 Difference]: Start difference. First operand has 122 places, 129 transitions, 569 flow. Second operand 6 states and 528 transitions. [2024-11-19 09:46:20,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 278 transitions, 1696 flow [2024-11-19 09:46:20,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 278 transitions, 1690 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-19 09:46:20,089 INFO L231 Difference]: Finished difference. Result has 128 places, 130 transitions, 603 flow [2024-11-19 09:46:20,090 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=551, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=603, PETRI_PLACES=128, PETRI_TRANSITIONS=130} [2024-11-19 09:46:20,090 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, 18 predicate places. [2024-11-19 09:46:20,090 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 130 transitions, 603 flow [2024-11-19 09:46:20,090 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 64.0) internal successors, (384), 6 states have internal predecessors, (384), 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) [2024-11-19 09:46:20,090 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:46:20,091 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:46:20,091 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-19 09:46:20,091 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-19 09:46:20,091 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:46:20,091 INFO L85 PathProgramCache]: Analyzing trace with hash -302967060, now seen corresponding path program 1 times [2024-11-19 09:46:20,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:46:20,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919956098] [2024-11-19 09:46:20,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:46:20,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:46:20,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:46:20,253 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-19 09:46:20,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:46:20,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919956098] [2024-11-19 09:46:20,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919956098] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:46:20,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:46:20,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 09:46:20,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942753893] [2024-11-19 09:46:20,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:46:20,255 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:46:20,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:46:20,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:46:20,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:46:20,261 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 126 [2024-11-19 09:46:20,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 130 transitions, 603 flow. Second operand has 5 states, 5 states have (on average 65.0) internal successors, (325), 5 states have internal predecessors, (325), 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) [2024-11-19 09:46:20,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:46:20,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 126 [2024-11-19 09:46:20,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:46:25,561 INFO L124 PetriNetUnfolderBase]: 27132/47883 cut-off events. [2024-11-19 09:46:25,561 INFO L125 PetriNetUnfolderBase]: For 39118/40502 co-relation queries the response was YES. [2024-11-19 09:46:25,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122251 conditions, 47883 events. 27132/47883 cut-off events. For 39118/40502 co-relation queries the response was YES. Maximal size of possible extension queue 630. Compared 379011 event pairs, 10063 based on Foata normal form. 428/45040 useless extension candidates. Maximal degree in co-relation 122228. Up to 21159 conditions per place. [2024-11-19 09:46:25,912 INFO L140 encePairwiseOnDemand]: 117/126 looper letters, 192 selfloop transitions, 13 changer transitions 0/238 dead transitions. [2024-11-19 09:46:25,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 238 transitions, 1480 flow [2024-11-19 09:46:25,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:46:25,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:46:25,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 438 transitions. [2024-11-19 09:46:25,914 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6952380952380952 [2024-11-19 09:46:25,914 INFO L175 Difference]: Start difference. First operand has 128 places, 130 transitions, 603 flow. Second operand 5 states and 438 transitions. [2024-11-19 09:46:25,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 238 transitions, 1480 flow [2024-11-19 09:46:25,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 238 transitions, 1473 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:46:25,984 INFO L231 Difference]: Finished difference. Result has 132 places, 131 transitions, 642 flow [2024-11-19 09:46:25,984 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=596, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=642, PETRI_PLACES=132, PETRI_TRANSITIONS=131} [2024-11-19 09:46:25,985 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, 22 predicate places. [2024-11-19 09:46:25,985 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 131 transitions, 642 flow [2024-11-19 09:46:25,985 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 65.0) internal successors, (325), 5 states have internal predecessors, (325), 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) [2024-11-19 09:46:25,986 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:46:25,986 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:46:25,986 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-19 09:46:25,986 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-19 09:46:25,986 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:46:25,986 INFO L85 PathProgramCache]: Analyzing trace with hash -830229087, now seen corresponding path program 1 times [2024-11-19 09:46:25,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:46:25,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020480343] [2024-11-19 09:46:25,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:46:25,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:46:26,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:46:26,190 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-19 09:46:26,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:46:26,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020480343] [2024-11-19 09:46:26,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020480343] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:46:26,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:46:26,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-19 09:46:26,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132135893] [2024-11-19 09:46:26,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:46:26,192 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 09:46:26,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:46:26,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 09:46:26,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-19 09:46:26,201 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 126 [2024-11-19 09:46:26,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 131 transitions, 642 flow. Second operand has 6 states, 6 states have (on average 62.5) internal successors, (375), 6 states have internal predecessors, (375), 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) [2024-11-19 09:46:26,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:46:26,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 126 [2024-11-19 09:46:26,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand