./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version fca748b1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-array-int-subst.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 779f57e464f50d458e1b66270e0c9f2866c6247d4d7f63a3096c6ac13e286657 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dd.update-z3-fca748b-m [2024-11-20 17:38:56,248 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-20 17:38:56,310 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-20 17:38:56,318 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-20 17:38:56,319 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-20 17:38:56,351 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-20 17:38:56,353 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-20 17:38:56,354 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-20 17:38:56,354 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-20 17:38:56,355 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-20 17:38:56,355 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-20 17:38:56,355 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-20 17:38:56,356 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-20 17:38:56,356 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-20 17:38:56,357 INFO L153 SettingsManager]: * Use SBE=true [2024-11-20 17:38:56,357 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-20 17:38:56,359 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-20 17:38:56,362 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-20 17:38:56,362 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-20 17:38:56,362 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-20 17:38:56,363 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-20 17:38:56,363 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-20 17:38:56,363 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-20 17:38:56,364 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-20 17:38:56,364 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-20 17:38:56,364 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-20 17:38:56,364 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-20 17:38:56,364 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-20 17:38:56,365 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-20 17:38:56,365 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-20 17:38:56,365 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-20 17:38:56,365 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-20 17:38:56,366 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-20 17:38:56,366 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 17:38:56,368 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-20 17:38:56,369 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-20 17:38:56,369 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-20 17:38:56,369 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-20 17:38:56,370 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-20 17:38:56,370 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-20 17:38:56,370 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-20 17:38:56,370 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-20 17:38:56,371 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 779f57e464f50d458e1b66270e0c9f2866c6247d4d7f63a3096c6ac13e286657 [2024-11-20 17:38:56,633 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-20 17:38:56,659 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-20 17:38:56,662 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-20 17:38:56,663 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-20 17:38:56,663 INFO L274 PluginConnector]: CDTParser initialized [2024-11-20 17:38:56,665 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c [2024-11-20 17:38:58,073 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-20 17:38:58,268 INFO L384 CDTParser]: Found 1 translation units. [2024-11-20 17:38:58,268 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c [2024-11-20 17:38:58,276 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a53da4fc6/507bda8b98334a70a12cdf5dc24ebcf3/FLAGbbce6d38a [2024-11-20 17:38:58,635 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a53da4fc6/507bda8b98334a70a12cdf5dc24ebcf3 [2024-11-20 17:38:58,637 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-20 17:38:58,638 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-20 17:38:58,639 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-20 17:38:58,640 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-20 17:38:58,645 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-20 17:38:58,646 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:38:58" (1/1) ... [2024-11-20 17:38:58,649 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57c4f474 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:38:58, skipping insertion in model container [2024-11-20 17:38:58,649 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:38:58" (1/1) ... [2024-11-20 17:38:58,671 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-20 17:38:58,878 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-20 17:38:58,886 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 17:38:58,895 INFO L200 MainTranslator]: Completed pre-run [2024-11-20 17:38:58,938 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 17:38:58,964 INFO L204 MainTranslator]: Completed translation [2024-11-20 17:38:58,964 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:38:58 WrapperNode [2024-11-20 17:38:58,964 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-20 17:38:58,965 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-20 17:38:58,965 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-20 17:38:58,966 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-20 17:38:58,986 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:38:58" (1/1) ... [2024-11-20 17:38:58,995 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:38:58" (1/1) ... [2024-11-20 17:38:59,025 INFO L138 Inliner]: procedures = 25, calls = 36, calls flagged for inlining = 15, calls inlined = 23, statements flattened = 276 [2024-11-20 17:38:59,026 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-20 17:38:59,027 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-20 17:38:59,027 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-20 17:38:59,027 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-20 17:38:59,036 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:38:58" (1/1) ... [2024-11-20 17:38:59,037 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:38:58" (1/1) ... [2024-11-20 17:38:59,041 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:38:58" (1/1) ... [2024-11-20 17:38:59,061 INFO L175 MemorySlicer]: Split 17 memory accesses to 2 slices as follows [2, 15]. 88 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-11-20 17:38:59,061 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:38:58" (1/1) ... [2024-11-20 17:38:59,062 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:38:58" (1/1) ... [2024-11-20 17:38:59,073 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:38:58" (1/1) ... [2024-11-20 17:38:59,081 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:38:58" (1/1) ... [2024-11-20 17:38:59,085 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:38:58" (1/1) ... [2024-11-20 17:38:59,091 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:38:58" (1/1) ... [2024-11-20 17:38:59,095 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-20 17:38:59,096 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-20 17:38:59,096 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-20 17:38:59,096 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-20 17:38:59,097 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:38:58" (1/1) ... [2024-11-20 17:38:59,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 17:38:59,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:38:59,131 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-20 17:38:59,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-20 17:38:59,168 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-20 17:38:59,168 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-20 17:38:59,168 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-20 17:38:59,169 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-20 17:38:59,169 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-20 17:38:59,169 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-20 17:38:59,169 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-20 17:38:59,169 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-20 17:38:59,169 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-20 17:38:59,169 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-20 17:38:59,169 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-20 17:38:59,169 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-20 17:38:59,170 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-20 17:38:59,170 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-20 17:38:59,170 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-20 17:38:59,170 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-20 17:38:59,172 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-20 17:38:59,270 INFO L238 CfgBuilder]: Building ICFG [2024-11-20 17:38:59,271 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-20 17:38:59,865 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-20 17:38:59,865 INFO L287 CfgBuilder]: Performing block encoding [2024-11-20 17:39:00,178 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-20 17:39:00,179 INFO L316 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-20 17:39:00,179 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:39:00 BoogieIcfgContainer [2024-11-20 17:39:00,179 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-20 17:39:00,182 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-20 17:39:00,183 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-20 17:39:00,186 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-20 17:39:00,186 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 05:38:58" (1/3) ... [2024-11-20 17:39:00,187 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@706571d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:39:00, skipping insertion in model container [2024-11-20 17:39:00,188 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:38:58" (2/3) ... [2024-11-20 17:39:00,188 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@706571d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:39:00, skipping insertion in model container [2024-11-20 17:39:00,189 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:39:00" (3/3) ... [2024-11-20 17:39:00,190 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-array-int-subst.wvr.c [2024-11-20 17:39:00,208 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-20 17:39:00,208 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2024-11-20 17:39:00,208 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-20 17:39:00,295 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-20 17:39:00,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 88 places, 87 transitions, 195 flow [2024-11-20 17:39:00,430 INFO L124 PetriNetUnfolderBase]: 9/84 cut-off events. [2024-11-20 17:39:00,430 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-20 17:39:00,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97 conditions, 84 events. 9/84 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 272 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 63. Up to 2 conditions per place. [2024-11-20 17:39:00,436 INFO L82 GeneralOperation]: Start removeDead. Operand has 88 places, 87 transitions, 195 flow [2024-11-20 17:39:00,440 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 84 places, 83 transitions, 184 flow [2024-11-20 17:39:00,452 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-20 17:39:00,460 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;@37c72ecd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-20 17:39:00,461 INFO L334 AbstractCegarLoop]: Starting to check reachability of 59 error locations. [2024-11-20 17:39:00,465 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-20 17:39:00,465 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-20 17:39:00,465 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-20 17:39:00,465 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:00,466 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-20 17:39:00,466 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-20 17:39:00,472 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:00,473 INFO L85 PathProgramCache]: Analyzing trace with hash 884889, now seen corresponding path program 1 times [2024-11-20 17:39:00,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:00,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119741812] [2024-11-20 17:39:00,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:00,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:00,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:00,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:39:00,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:00,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119741812] [2024-11-20 17:39:00,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119741812] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:39:00,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:39:00,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-20 17:39:00,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706859825] [2024-11-20 17:39:00,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:39:00,765 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:39:00,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:00,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:39:00,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:39:00,859 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 87 [2024-11-20 17:39:00,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 83 transitions, 184 flow. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:00,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:00,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 87 [2024-11-20 17:39:00,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:01,186 INFO L124 PetriNetUnfolderBase]: 977/1690 cut-off events. [2024-11-20 17:39:01,186 INFO L125 PetriNetUnfolderBase]: For 82/82 co-relation queries the response was YES. [2024-11-20 17:39:01,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3114 conditions, 1690 events. 977/1690 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 9349 event pairs, 608 based on Foata normal form. 1/1197 useless extension candidates. Maximal degree in co-relation 2854. Up to 1318 conditions per place. [2024-11-20 17:39:01,207 INFO L140 encePairwiseOnDemand]: 81/87 looper letters, 36 selfloop transitions, 2 changer transitions 0/78 dead transitions. [2024-11-20 17:39:01,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 78 transitions, 250 flow [2024-11-20 17:39:01,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:39:01,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:39:01,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 174 transitions. [2024-11-20 17:39:01,222 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-11-20 17:39:01,224 INFO L175 Difference]: Start difference. First operand has 84 places, 83 transitions, 184 flow. Second operand 3 states and 174 transitions. [2024-11-20 17:39:01,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 78 transitions, 250 flow [2024-11-20 17:39:01,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 78 transitions, 238 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-20 17:39:01,235 INFO L231 Difference]: Finished difference. Result has 75 places, 78 transitions, 166 flow [2024-11-20 17:39:01,238 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=75, PETRI_TRANSITIONS=78} [2024-11-20 17:39:01,243 INFO L277 CegarLoopForPetriNet]: 84 programPoint places, -9 predicate places. [2024-11-20 17:39:01,243 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 78 transitions, 166 flow [2024-11-20 17:39:01,244 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:01,244 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:01,244 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-20 17:39:01,245 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-20 17:39:01,245 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-20 17:39:01,245 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:01,246 INFO L85 PathProgramCache]: Analyzing trace with hash 884890, now seen corresponding path program 1 times [2024-11-20 17:39:01,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:01,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776666699] [2024-11-20 17:39:01,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:01,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:01,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:01,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:39:01,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:01,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776666699] [2024-11-20 17:39:01,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776666699] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:39:01,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:39:01,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 17:39:01,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870766583] [2024-11-20 17:39:01,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:39:01,587 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:39:01,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:01,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:39:01,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:39:01,677 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 87 [2024-11-20 17:39:01,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 78 transitions, 166 flow. Second operand has 4 states, 4 states have (on average 44.75) internal successors, (179), 4 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:01,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:01,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 87 [2024-11-20 17:39:01,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:01,974 INFO L124 PetriNetUnfolderBase]: 978/1693 cut-off events. [2024-11-20 17:39:01,975 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2024-11-20 17:39:01,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3061 conditions, 1693 events. 978/1693 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 9360 event pairs, 608 based on Foata normal form. 0/1196 useless extension candidates. Maximal degree in co-relation 3024. Up to 1331 conditions per place. [2024-11-20 17:39:01,989 INFO L140 encePairwiseOnDemand]: 82/87 looper letters, 40 selfloop transitions, 4 changer transitions 0/81 dead transitions. [2024-11-20 17:39:01,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 81 transitions, 260 flow [2024-11-20 17:39:01,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 17:39:01,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 17:39:01,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 221 transitions. [2024-11-20 17:39:01,992 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6350574712643678 [2024-11-20 17:39:01,992 INFO L175 Difference]: Start difference. First operand has 75 places, 78 transitions, 166 flow. Second operand 4 states and 221 transitions. [2024-11-20 17:39:01,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 81 transitions, 260 flow [2024-11-20 17:39:01,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 81 transitions, 256 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:39:01,996 INFO L231 Difference]: Finished difference. Result has 78 places, 81 transitions, 189 flow [2024-11-20 17:39:01,996 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=189, PETRI_PLACES=78, PETRI_TRANSITIONS=81} [2024-11-20 17:39:01,997 INFO L277 CegarLoopForPetriNet]: 84 programPoint places, -6 predicate places. [2024-11-20 17:39:01,997 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 81 transitions, 189 flow [2024-11-20 17:39:01,997 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.75) internal successors, (179), 4 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:01,998 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:01,998 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-20 17:39:01,998 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-20 17:39:01,998 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-20 17:39:02,000 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:02,000 INFO L85 PathProgramCache]: Analyzing trace with hash 27433156, now seen corresponding path program 1 times [2024-11-20 17:39:02,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:02,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514972301] [2024-11-20 17:39:02,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:02,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:02,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:02,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:39:02,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:02,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514972301] [2024-11-20 17:39:02,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514972301] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:39:02,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:39:02,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 17:39:02,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577329884] [2024-11-20 17:39:02,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:39:02,216 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:39:02,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:02,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:39:02,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-20 17:39:02,356 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 87 [2024-11-20 17:39:02,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 81 transitions, 189 flow. Second operand has 5 states, 5 states have (on average 44.8) internal successors, (224), 5 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:02,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:02,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 87 [2024-11-20 17:39:02,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:02,670 INFO L124 PetriNetUnfolderBase]: 979/1696 cut-off events. [2024-11-20 17:39:02,670 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2024-11-20 17:39:02,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3078 conditions, 1696 events. 979/1696 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 9374 event pairs, 608 based on Foata normal form. 0/1198 useless extension candidates. Maximal degree in co-relation 3053. Up to 1330 conditions per place. [2024-11-20 17:39:02,685 INFO L140 encePairwiseOnDemand]: 79/87 looper letters, 40 selfloop transitions, 7 changer transitions 0/84 dead transitions. [2024-11-20 17:39:02,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 84 transitions, 289 flow [2024-11-20 17:39:02,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:39:02,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:39:02,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 268 transitions. [2024-11-20 17:39:02,692 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6160919540229886 [2024-11-20 17:39:02,692 INFO L175 Difference]: Start difference. First operand has 78 places, 81 transitions, 189 flow. Second operand 5 states and 268 transitions. [2024-11-20 17:39:02,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 84 transitions, 289 flow [2024-11-20 17:39:02,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 84 transitions, 286 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 17:39:02,694 INFO L231 Difference]: Finished difference. Result has 83 places, 84 transitions, 223 flow [2024-11-20 17:39:02,695 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=223, PETRI_PLACES=83, PETRI_TRANSITIONS=84} [2024-11-20 17:39:02,696 INFO L277 CegarLoopForPetriNet]: 84 programPoint places, -1 predicate places. [2024-11-20 17:39:02,697 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 84 transitions, 223 flow [2024-11-20 17:39:02,697 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 44.8) internal successors, (224), 5 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:02,697 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:02,697 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-20 17:39:02,697 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-20 17:39:02,698 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-20 17:39:02,698 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:02,698 INFO L85 PathProgramCache]: Analyzing trace with hash 850407929, now seen corresponding path program 1 times [2024-11-20 17:39:02,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:02,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177437670] [2024-11-20 17:39:02,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:02,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:02,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:02,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:39:02,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:02,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177437670] [2024-11-20 17:39:02,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177437670] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:39:02,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502674580] [2024-11-20 17:39:02,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:02,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:39:02,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:39:02,949 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:39:02,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-20 17:39:03,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:03,026 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-20 17:39:03,030 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:39:03,092 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-20 17:39:03,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:39:03,313 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:39:03,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:39:03,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502674580] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:39:03,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:39:03,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-20 17:39:03,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306513174] [2024-11-20 17:39:03,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:39:03,424 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-20 17:39:03,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:03,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-20 17:39:03,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-20 17:39:03,927 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 87 [2024-11-20 17:39:03,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 84 transitions, 223 flow. Second operand has 11 states, 11 states have (on average 45.36363636363637) internal successors, (499), 11 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:03,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:03,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 87 [2024-11-20 17:39:03,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:04,342 INFO L124 PetriNetUnfolderBase]: 980/1698 cut-off events. [2024-11-20 17:39:04,342 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-11-20 17:39:04,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3101 conditions, 1698 events. 980/1698 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 9312 event pairs, 608 based on Foata normal form. 0/1203 useless extension candidates. Maximal degree in co-relation 3063. Up to 1331 conditions per place. [2024-11-20 17:39:04,356 INFO L140 encePairwiseOnDemand]: 82/87 looper letters, 39 selfloop transitions, 10 changer transitions 0/86 dead transitions. [2024-11-20 17:39:04,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 86 transitions, 332 flow [2024-11-20 17:39:04,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-20 17:39:04,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-20 17:39:04,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 400 transitions. [2024-11-20 17:39:04,358 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5747126436781609 [2024-11-20 17:39:04,358 INFO L175 Difference]: Start difference. First operand has 83 places, 84 transitions, 223 flow. Second operand 8 states and 400 transitions. [2024-11-20 17:39:04,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 86 transitions, 332 flow [2024-11-20 17:39:04,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 86 transitions, 331 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 17:39:04,361 INFO L231 Difference]: Finished difference. Result has 88 places, 86 transitions, 253 flow [2024-11-20 17:39:04,361 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=253, PETRI_PLACES=88, PETRI_TRANSITIONS=86} [2024-11-20 17:39:04,361 INFO L277 CegarLoopForPetriNet]: 84 programPoint places, 4 predicate places. [2024-11-20 17:39:04,362 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 86 transitions, 253 flow [2024-11-20 17:39:04,362 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 45.36363636363637) internal successors, (499), 11 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:04,362 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:04,362 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-20 17:39:04,372 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-20 17:39:04,563 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:39:04,564 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-20 17:39:04,564 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:04,564 INFO L85 PathProgramCache]: Analyzing trace with hash 850430064, now seen corresponding path program 1 times [2024-11-20 17:39:04,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:04,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025995562] [2024-11-20 17:39:04,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:04,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:04,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:04,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:39:04,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:04,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025995562] [2024-11-20 17:39:04,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025995562] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:39:04,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:39:04,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 17:39:04,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131051173] [2024-11-20 17:39:04,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:39:04,743 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:39:04,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:04,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:39:04,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-20 17:39:04,921 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 87 [2024-11-20 17:39:04,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 86 transitions, 253 flow. Second operand has 5 states, 5 states have (on average 45.0) internal successors, (225), 5 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:04,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:04,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 87 [2024-11-20 17:39:04,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:05,160 INFO L124 PetriNetUnfolderBase]: 981/1701 cut-off events. [2024-11-20 17:39:05,160 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-11-20 17:39:05,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3117 conditions, 1701 events. 981/1701 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 9341 event pairs, 608 based on Foata normal form. 0/1205 useless extension candidates. Maximal degree in co-relation 3071. Up to 1335 conditions per place. [2024-11-20 17:39:05,174 INFO L140 encePairwiseOnDemand]: 78/87 looper letters, 43 selfloop transitions, 9 changer transitions 0/89 dead transitions. [2024-11-20 17:39:05,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 89 transitions, 363 flow [2024-11-20 17:39:05,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:39:05,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:39:05,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 267 transitions. [2024-11-20 17:39:05,179 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6137931034482759 [2024-11-20 17:39:05,179 INFO L175 Difference]: Start difference. First operand has 88 places, 86 transitions, 253 flow. Second operand 5 states and 267 transitions. [2024-11-20 17:39:05,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 89 transitions, 363 flow [2024-11-20 17:39:05,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 89 transitions, 316 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-11-20 17:39:05,182 INFO L231 Difference]: Finished difference. Result has 86 places, 89 transitions, 249 flow [2024-11-20 17:39:05,182 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=249, PETRI_PLACES=86, PETRI_TRANSITIONS=89} [2024-11-20 17:39:05,183 INFO L277 CegarLoopForPetriNet]: 84 programPoint places, 2 predicate places. [2024-11-20 17:39:05,183 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 89 transitions, 249 flow [2024-11-20 17:39:05,183 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 45.0) internal successors, (225), 5 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:05,184 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:05,184 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-20 17:39:05,184 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-20 17:39:05,184 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-20 17:39:05,184 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:05,184 INFO L85 PathProgramCache]: Analyzing trace with hash 593487459, now seen corresponding path program 1 times [2024-11-20 17:39:05,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:05,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237145774] [2024-11-20 17:39:05,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:05,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:05,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:05,435 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:39:05,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:05,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237145774] [2024-11-20 17:39:05,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237145774] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:39:05,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371202862] [2024-11-20 17:39:05,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:05,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:39:05,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:39:05,439 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:39:05,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-20 17:39:05,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:05,504 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-20 17:39:05,505 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:39:05,523 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-20 17:39:05,643 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:39:05,643 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:39:05,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:39:05,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371202862] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:39:05,781 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:39:05,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-20 17:39:05,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417140419] [2024-11-20 17:39:05,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:39:05,782 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-20 17:39:05,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:05,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-20 17:39:05,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-11-20 17:39:06,509 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 87 [2024-11-20 17:39:06,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 89 transitions, 249 flow. Second operand has 13 states, 13 states have (on average 45.30769230769231) internal successors, (589), 13 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:06,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:06,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 87 [2024-11-20 17:39:06,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:06,971 INFO L124 PetriNetUnfolderBase]: 982/1703 cut-off events. [2024-11-20 17:39:06,971 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2024-11-20 17:39:06,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3119 conditions, 1703 events. 982/1703 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 9367 event pairs, 608 based on Foata normal form. 0/1210 useless extension candidates. Maximal degree in co-relation 3067. Up to 1326 conditions per place. [2024-11-20 17:39:06,990 INFO L140 encePairwiseOnDemand]: 79/87 looper letters, 36 selfloop transitions, 18 changer transitions 0/91 dead transitions. [2024-11-20 17:39:06,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 91 transitions, 368 flow [2024-11-20 17:39:06,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 17:39:06,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-20 17:39:06,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 449 transitions. [2024-11-20 17:39:06,992 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5734355044699873 [2024-11-20 17:39:06,992 INFO L175 Difference]: Start difference. First operand has 86 places, 89 transitions, 249 flow. Second operand 9 states and 449 transitions. [2024-11-20 17:39:06,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 91 transitions, 368 flow [2024-11-20 17:39:06,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 91 transitions, 360 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:39:06,995 INFO L231 Difference]: Finished difference. Result has 91 places, 91 transitions, 288 flow [2024-11-20 17:39:06,995 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=288, PETRI_PLACES=91, PETRI_TRANSITIONS=91} [2024-11-20 17:39:06,995 INFO L277 CegarLoopForPetriNet]: 84 programPoint places, 7 predicate places. [2024-11-20 17:39:06,996 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 91 transitions, 288 flow [2024-11-20 17:39:06,996 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 45.30769230769231) internal successors, (589), 13 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:06,996 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:06,996 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-11-20 17:39:07,005 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-20 17:39:07,200 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,SelfDestructingSolverStorable5 [2024-11-20 17:39:07,201 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-20 17:39:07,201 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:07,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1219533935, now seen corresponding path program 1 times [2024-11-20 17:39:07,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:07,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511489778] [2024-11-20 17:39:07,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:07,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:07,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:07,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:39:07,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:07,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511489778] [2024-11-20 17:39:07,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511489778] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:39:07,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287251122] [2024-11-20 17:39:07,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:07,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:39:07,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:39:07,393 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:39:07,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-20 17:39:07,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:07,470 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-20 17:39:07,471 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:39:07,487 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-20 17:39:07,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:39:07,714 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:39:07,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:39:07,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287251122] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:39:07,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:39:07,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-20 17:39:07,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150453793] [2024-11-20 17:39:07,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:39:07,834 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-20 17:39:07,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:07,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-20 17:39:07,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-11-20 17:39:08,595 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 87 [2024-11-20 17:39:08,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 91 transitions, 288 flow. Second operand has 13 states, 13 states have (on average 45.46153846153846) internal successors, (591), 13 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:08,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:08,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 87 [2024-11-20 17:39:08,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:09,111 INFO L124 PetriNetUnfolderBase]: 983/1705 cut-off events. [2024-11-20 17:39:09,111 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2024-11-20 17:39:09,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3139 conditions, 1705 events. 983/1705 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 9354 event pairs, 608 based on Foata normal form. 0/1212 useless extension candidates. Maximal degree in co-relation 3075. Up to 1328 conditions per place. [2024-11-20 17:39:09,124 INFO L140 encePairwiseOnDemand]: 78/87 looper letters, 34 selfloop transitions, 22 changer transitions 0/93 dead transitions. [2024-11-20 17:39:09,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 93 transitions, 408 flow [2024-11-20 17:39:09,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 17:39:09,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-20 17:39:09,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 448 transitions. [2024-11-20 17:39:09,126 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5721583652618135 [2024-11-20 17:39:09,126 INFO L175 Difference]: Start difference. First operand has 91 places, 91 transitions, 288 flow. Second operand 9 states and 448 transitions. [2024-11-20 17:39:09,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 93 transitions, 408 flow [2024-11-20 17:39:09,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 93 transitions, 375 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-11-20 17:39:09,131 INFO L231 Difference]: Finished difference. Result has 93 places, 93 transitions, 307 flow [2024-11-20 17:39:09,131 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=307, PETRI_PLACES=93, PETRI_TRANSITIONS=93} [2024-11-20 17:39:09,132 INFO L277 CegarLoopForPetriNet]: 84 programPoint places, 9 predicate places. [2024-11-20 17:39:09,133 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 93 transitions, 307 flow [2024-11-20 17:39:09,133 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 45.46153846153846) internal successors, (591), 13 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:09,133 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:09,133 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:39:09,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-20 17:39:09,334 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:39:09,334 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-20 17:39:09,335 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:09,335 INFO L85 PathProgramCache]: Analyzing trace with hash -844348422, now seen corresponding path program 1 times [2024-11-20 17:39:09,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:09,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139240511] [2024-11-20 17:39:09,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:09,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:09,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:09,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:39:09,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:09,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139240511] [2024-11-20 17:39:09,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139240511] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:39:09,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:39:09,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 17:39:09,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695420274] [2024-11-20 17:39:09,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:39:09,415 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:39:09,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:09,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:39:09,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 17:39:09,457 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 87 [2024-11-20 17:39:09,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 93 transitions, 307 flow. Second operand has 5 states, 5 states have (on average 47.4) internal successors, (237), 5 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:09,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:09,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 87 [2024-11-20 17:39:09,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:09,815 INFO L124 PetriNetUnfolderBase]: 1838/3069 cut-off events. [2024-11-20 17:39:09,815 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-11-20 17:39:09,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5782 conditions, 3069 events. 1838/3069 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 18265 event pairs, 797 based on Foata normal form. 0/2250 useless extension candidates. Maximal degree in co-relation 3634. Up to 1573 conditions per place. [2024-11-20 17:39:09,835 INFO L140 encePairwiseOnDemand]: 78/87 looper letters, 108 selfloop transitions, 9 changer transitions 0/153 dead transitions. [2024-11-20 17:39:09,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 153 transitions, 737 flow [2024-11-20 17:39:09,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 17:39:09,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-20 17:39:09,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 373 transitions. [2024-11-20 17:39:09,837 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7145593869731801 [2024-11-20 17:39:09,837 INFO L175 Difference]: Start difference. First operand has 93 places, 93 transitions, 307 flow. Second operand 6 states and 373 transitions. [2024-11-20 17:39:09,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 153 transitions, 737 flow [2024-11-20 17:39:09,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 153 transitions, 659 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-11-20 17:39:09,841 INFO L231 Difference]: Finished difference. Result has 95 places, 99 transitions, 329 flow [2024-11-20 17:39:09,841 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=329, PETRI_PLACES=95, PETRI_TRANSITIONS=99} [2024-11-20 17:39:09,842 INFO L277 CegarLoopForPetriNet]: 84 programPoint places, 11 predicate places. [2024-11-20 17:39:09,843 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 99 transitions, 329 flow [2024-11-20 17:39:09,844 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.4) internal successors, (237), 5 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:09,844 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:09,844 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:39:09,844 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-20 17:39:09,844 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-20 17:39:09,844 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:09,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1674799621, now seen corresponding path program 1 times [2024-11-20 17:39:09,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:09,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153402204] [2024-11-20 17:39:09,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:09,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:09,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:09,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:39:09,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:09,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153402204] [2024-11-20 17:39:09,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153402204] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:39:09,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:39:09,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-20 17:39:09,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181798673] [2024-11-20 17:39:09,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:39:09,924 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:39:09,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:09,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:39:09,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 17:39:09,961 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 87 [2024-11-20 17:39:09,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 99 transitions, 329 flow. Second operand has 5 states, 5 states have (on average 47.8) internal successors, (239), 5 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:09,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:09,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 87 [2024-11-20 17:39:09,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:10,562 INFO L124 PetriNetUnfolderBase]: 3204/5372 cut-off events. [2024-11-20 17:39:10,563 INFO L125 PetriNetUnfolderBase]: For 575/575 co-relation queries the response was YES. [2024-11-20 17:39:10,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10506 conditions, 5372 events. 3204/5372 cut-off events. For 575/575 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 35149 event pairs, 1344 based on Foata normal form. 62/4134 useless extension candidates. Maximal degree in co-relation 5911. Up to 2548 conditions per place. [2024-11-20 17:39:10,588 INFO L140 encePairwiseOnDemand]: 80/87 looper letters, 105 selfloop transitions, 12 changer transitions 0/153 dead transitions. [2024-11-20 17:39:10,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 153 transitions, 715 flow [2024-11-20 17:39:10,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 17:39:10,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-20 17:39:10,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 367 transitions. [2024-11-20 17:39:10,590 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7030651340996169 [2024-11-20 17:39:10,590 INFO L175 Difference]: Start difference. First operand has 95 places, 99 transitions, 329 flow. Second operand 6 states and 367 transitions. [2024-11-20 17:39:10,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 153 transitions, 715 flow [2024-11-20 17:39:10,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 153 transitions, 710 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:39:10,593 INFO L231 Difference]: Finished difference. Result has 101 places, 105 transitions, 411 flow [2024-11-20 17:39:10,593 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=411, PETRI_PLACES=101, PETRI_TRANSITIONS=105} [2024-11-20 17:39:10,594 INFO L277 CegarLoopForPetriNet]: 84 programPoint places, 17 predicate places. [2024-11-20 17:39:10,594 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 105 transitions, 411 flow [2024-11-20 17:39:10,594 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.8) internal successors, (239), 5 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:10,595 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:10,595 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:39:10,595 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-20 17:39:10,595 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-20 17:39:10,595 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:10,595 INFO L85 PathProgramCache]: Analyzing trace with hash 260525993, now seen corresponding path program 1 times [2024-11-20 17:39:10,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:10,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764891081] [2024-11-20 17:39:10,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:10,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:10,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:10,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:39:10,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:10,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764891081] [2024-11-20 17:39:10,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764891081] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:39:10,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:39:10,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 17:39:10,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335188640] [2024-11-20 17:39:10,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:39:10,661 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:39:10,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:10,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:39:10,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 17:39:10,694 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 87 [2024-11-20 17:39:10,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 105 transitions, 411 flow. Second operand has 5 states, 5 states have (on average 47.8) internal successors, (239), 5 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:10,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:10,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 87 [2024-11-20 17:39:10,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:11,183 INFO L124 PetriNetUnfolderBase]: 2878/5127 cut-off events. [2024-11-20 17:39:11,183 INFO L125 PetriNetUnfolderBase]: For 1549/1549 co-relation queries the response was YES. [2024-11-20 17:39:11,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10198 conditions, 5127 events. 2878/5127 cut-off events. For 1549/1549 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 35024 event pairs, 1446 based on Foata normal form. 0/3747 useless extension candidates. Maximal degree in co-relation 6451. Up to 2731 conditions per place. [2024-11-20 17:39:11,213 INFO L140 encePairwiseOnDemand]: 78/87 looper letters, 106 selfloop transitions, 11 changer transitions 0/153 dead transitions. [2024-11-20 17:39:11,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 153 transitions, 791 flow [2024-11-20 17:39:11,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 17:39:11,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-20 17:39:11,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 366 transitions. [2024-11-20 17:39:11,215 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7011494252873564 [2024-11-20 17:39:11,215 INFO L175 Difference]: Start difference. First operand has 101 places, 105 transitions, 411 flow. Second operand 6 states and 366 transitions. [2024-11-20 17:39:11,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 153 transitions, 791 flow [2024-11-20 17:39:11,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 153 transitions, 786 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 17:39:11,219 INFO L231 Difference]: Finished difference. Result has 107 places, 106 transitions, 443 flow [2024-11-20 17:39:11,220 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=443, PETRI_PLACES=107, PETRI_TRANSITIONS=106} [2024-11-20 17:39:11,220 INFO L277 CegarLoopForPetriNet]: 84 programPoint places, 23 predicate places. [2024-11-20 17:39:11,220 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 106 transitions, 443 flow [2024-11-20 17:39:11,221 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.8) internal successors, (239), 5 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:11,221 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:11,221 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:39:11,221 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-20 17:39:11,221 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-20 17:39:11,223 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:11,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1164351629, now seen corresponding path program 1 times [2024-11-20 17:39:11,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:11,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641680008] [2024-11-20 17:39:11,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:11,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:11,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:11,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:39:11,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:11,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641680008] [2024-11-20 17:39:11,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641680008] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:39:11,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:39:11,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-20 17:39:11,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952809214] [2024-11-20 17:39:11,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:39:11,308 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:39:11,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:11,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:39:11,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 17:39:11,351 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 87 [2024-11-20 17:39:11,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 106 transitions, 443 flow. Second operand has 5 states, 5 states have (on average 48.2) internal successors, (241), 5 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:11,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:11,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 87 [2024-11-20 17:39:11,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:11,840 INFO L124 PetriNetUnfolderBase]: 2458/5096 cut-off events. [2024-11-20 17:39:11,841 INFO L125 PetriNetUnfolderBase]: For 1856/1856 co-relation queries the response was YES. [2024-11-20 17:39:11,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9938 conditions, 5096 events. 2458/5096 cut-off events. For 1856/1856 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 39316 event pairs, 1378 based on Foata normal form. 0/3673 useless extension candidates. Maximal degree in co-relation 6282. Up to 2357 conditions per place. [2024-11-20 17:39:11,875 INFO L140 encePairwiseOnDemand]: 80/87 looper letters, 102 selfloop transitions, 11 changer transitions 0/149 dead transitions. [2024-11-20 17:39:11,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 149 transitions, 801 flow [2024-11-20 17:39:11,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 17:39:11,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-20 17:39:11,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 359 transitions. [2024-11-20 17:39:11,877 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6877394636015326 [2024-11-20 17:39:11,877 INFO L175 Difference]: Start difference. First operand has 107 places, 106 transitions, 443 flow. Second operand 6 states and 359 transitions. [2024-11-20 17:39:11,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 149 transitions, 801 flow [2024-11-20 17:39:11,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 149 transitions, 788 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-20 17:39:11,887 INFO L231 Difference]: Finished difference. Result has 111 places, 107 transitions, 464 flow [2024-11-20 17:39:11,888 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=430, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=464, PETRI_PLACES=111, PETRI_TRANSITIONS=107} [2024-11-20 17:39:11,890 INFO L277 CegarLoopForPetriNet]: 84 programPoint places, 27 predicate places. [2024-11-20 17:39:11,890 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 107 transitions, 464 flow [2024-11-20 17:39:11,890 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.2) internal successors, (241), 5 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:11,891 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:11,891 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:39:11,891 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-20 17:39:11,891 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-20 17:39:11,891 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:11,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1060840809, now seen corresponding path program 1 times [2024-11-20 17:39:11,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:11,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325608808] [2024-11-20 17:39:11,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:11,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:11,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:12,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:39:12,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:12,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325608808] [2024-11-20 17:39:12,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325608808] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:39:12,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:39:12,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-20 17:39:12,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084063953] [2024-11-20 17:39:12,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:39:12,021 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:39:12,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:12,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:39:12,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 17:39:12,051 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 87 [2024-11-20 17:39:12,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 107 transitions, 464 flow. Second operand has 5 states, 5 states have (on average 48.2) internal successors, (241), 5 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:12,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:12,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 87 [2024-11-20 17:39:12,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:12,853 INFO L124 PetriNetUnfolderBase]: 4218/8442 cut-off events. [2024-11-20 17:39:12,853 INFO L125 PetriNetUnfolderBase]: For 4142/4142 co-relation queries the response was YES. [2024-11-20 17:39:12,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17613 conditions, 8442 events. 4218/8442 cut-off events. For 4142/4142 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 69103 event pairs, 2131 based on Foata normal form. 109/6644 useless extension candidates. Maximal degree in co-relation 10234. Up to 3627 conditions per place. [2024-11-20 17:39:12,902 INFO L140 encePairwiseOnDemand]: 82/87 looper letters, 106 selfloop transitions, 15 changer transitions 0/157 dead transitions. [2024-11-20 17:39:12,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 157 transitions, 880 flow [2024-11-20 17:39:12,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:39:12,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:39:12,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 314 transitions. [2024-11-20 17:39:12,904 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7218390804597701 [2024-11-20 17:39:12,904 INFO L175 Difference]: Start difference. First operand has 111 places, 107 transitions, 464 flow. Second operand 5 states and 314 transitions. [2024-11-20 17:39:12,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 157 transitions, 880 flow [2024-11-20 17:39:12,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 157 transitions, 864 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-20 17:39:12,916 INFO L231 Difference]: Finished difference. Result has 114 places, 109 transitions, 502 flow [2024-11-20 17:39:12,916 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=448, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=502, PETRI_PLACES=114, PETRI_TRANSITIONS=109} [2024-11-20 17:39:12,916 INFO L277 CegarLoopForPetriNet]: 84 programPoint places, 30 predicate places. [2024-11-20 17:39:12,916 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 109 transitions, 502 flow [2024-11-20 17:39:12,917 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.2) internal successors, (241), 5 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:12,917 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:12,917 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:39:12,917 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-20 17:39:12,917 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-20 17:39:12,918 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:12,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1047494618, now seen corresponding path program 1 times [2024-11-20 17:39:12,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:12,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990405799] [2024-11-20 17:39:12,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:12,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:12,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:13,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:39:13,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:13,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990405799] [2024-11-20 17:39:13,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990405799] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:39:13,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:39:13,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 17:39:13,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516951112] [2024-11-20 17:39:13,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:39:13,066 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:39:13,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:13,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:39:13,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:39:13,136 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 87 [2024-11-20 17:39:13,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 109 transitions, 502 flow. Second operand has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:13,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:13,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 87 [2024-11-20 17:39:13,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:13,935 INFO L124 PetriNetUnfolderBase]: 5171/10750 cut-off events. [2024-11-20 17:39:13,935 INFO L125 PetriNetUnfolderBase]: For 6239/6239 co-relation queries the response was YES. [2024-11-20 17:39:13,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22225 conditions, 10750 events. 5171/10750 cut-off events. For 6239/6239 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 93630 event pairs, 4137 based on Foata normal form. 0/8369 useless extension candidates. Maximal degree in co-relation 12410. Up to 7536 conditions per place. [2024-11-20 17:39:13,996 INFO L140 encePairwiseOnDemand]: 80/87 looper letters, 66 selfloop transitions, 10 changer transitions 0/105 dead transitions. [2024-11-20 17:39:13,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 105 transitions, 646 flow [2024-11-20 17:39:13,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:39:13,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:39:13,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 226 transitions. [2024-11-20 17:39:13,998 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5195402298850574 [2024-11-20 17:39:13,998 INFO L175 Difference]: Start difference. First operand has 114 places, 109 transitions, 502 flow. Second operand 5 states and 226 transitions. [2024-11-20 17:39:13,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 105 transitions, 646 flow [2024-11-20 17:39:14,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 105 transitions, 637 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 17:39:14,012 INFO L231 Difference]: Finished difference. Result has 113 places, 105 transitions, 505 flow [2024-11-20 17:39:14,012 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=505, PETRI_PLACES=113, PETRI_TRANSITIONS=105} [2024-11-20 17:39:14,012 INFO L277 CegarLoopForPetriNet]: 84 programPoint places, 29 predicate places. [2024-11-20 17:39:14,013 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 105 transitions, 505 flow [2024-11-20 17:39:14,013 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:14,013 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:14,013 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:39:14,013 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-20 17:39:14,013 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-20 17:39:14,014 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:14,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1047494619, now seen corresponding path program 1 times [2024-11-20 17:39:14,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:14,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144109173] [2024-11-20 17:39:14,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:14,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:14,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:14,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:39:14,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:14,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144109173] [2024-11-20 17:39:14,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144109173] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:39:14,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598593319] [2024-11-20 17:39:14,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:14,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:39:14,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:39:14,323 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:39:14,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-20 17:39:14,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:14,414 INFO L255 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-20 17:39:14,416 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:39:14,433 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-20 17:39:14,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 17:39:14,491 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-20 17:39:14,519 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-20 17:39:14,519 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-20 17:39:14,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 17:39:14,571 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-20 17:39:14,579 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 17:39:14,580 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-20 17:39:14,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:39:14,631 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:39:14,900 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 100 treesize of output 96 [2024-11-20 17:39:15,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:39:15,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598593319] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:39:15,119 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:39:15,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2024-11-20 17:39:15,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724102642] [2024-11-20 17:39:15,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:39:15,120 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-20 17:39:15,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:15,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-20 17:39:15,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2024-11-20 17:39:18,682 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 87 [2024-11-20 17:39:18,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 105 transitions, 505 flow. Second operand has 16 states, 16 states have (on average 35.9375) internal successors, (575), 16 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:18,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:18,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 87 [2024-11-20 17:39:18,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:20,183 INFO L124 PetriNetUnfolderBase]: 8542/15539 cut-off events. [2024-11-20 17:39:20,183 INFO L125 PetriNetUnfolderBase]: For 7539/7539 co-relation queries the response was YES. [2024-11-20 17:39:20,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32802 conditions, 15539 events. 8542/15539 cut-off events. For 7539/7539 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 124059 event pairs, 2830 based on Foata normal form. 0/12467 useless extension candidates. Maximal degree in co-relation 21596. Up to 4443 conditions per place. [2024-11-20 17:39:20,293 INFO L140 encePairwiseOnDemand]: 75/87 looper letters, 141 selfloop transitions, 27 changer transitions 0/195 dead transitions. [2024-11-20 17:39:20,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 195 transitions, 1104 flow [2024-11-20 17:39:20,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 17:39:20,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-20 17:39:20,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 449 transitions. [2024-11-20 17:39:20,296 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5734355044699873 [2024-11-20 17:39:20,296 INFO L175 Difference]: Start difference. First operand has 113 places, 105 transitions, 505 flow. Second operand 9 states and 449 transitions. [2024-11-20 17:39:20,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 195 transitions, 1104 flow [2024-11-20 17:39:20,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 195 transitions, 1088 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-20 17:39:20,311 INFO L231 Difference]: Finished difference. Result has 119 places, 108 transitions, 571 flow [2024-11-20 17:39:20,312 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=489, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=571, PETRI_PLACES=119, PETRI_TRANSITIONS=108} [2024-11-20 17:39:20,312 INFO L277 CegarLoopForPetriNet]: 84 programPoint places, 35 predicate places. [2024-11-20 17:39:20,312 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 108 transitions, 571 flow [2024-11-20 17:39:20,313 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 35.9375) internal successors, (575), 16 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:20,313 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:20,313 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:39:20,322 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-20 17:39:20,513 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:39:20,514 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-20 17:39:20,514 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:20,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1887404329, now seen corresponding path program 1 times [2024-11-20 17:39:20,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:20,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484061838] [2024-11-20 17:39:20,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:20,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:20,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:20,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:39:20,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:20,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484061838] [2024-11-20 17:39:20,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484061838] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:39:20,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:39:20,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 17:39:20,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081220610] [2024-11-20 17:39:20,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:39:20,603 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:39:20,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:20,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:39:20,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:39:20,678 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 87 [2024-11-20 17:39:20,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 108 transitions, 571 flow. Second operand has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:20,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:20,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 87 [2024-11-20 17:39:20,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:21,991 INFO L124 PetriNetUnfolderBase]: 8055/14888 cut-off events. [2024-11-20 17:39:21,992 INFO L125 PetriNetUnfolderBase]: For 10621/10621 co-relation queries the response was YES. [2024-11-20 17:39:22,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33039 conditions, 14888 events. 8055/14888 cut-off events. For 10621/10621 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 119140 event pairs, 6517 based on Foata normal form. 0/13167 useless extension candidates. Maximal degree in co-relation 22409. Up to 11626 conditions per place. [2024-11-20 17:39:22,082 INFO L140 encePairwiseOnDemand]: 80/87 looper letters, 64 selfloop transitions, 14 changer transitions 0/104 dead transitions. [2024-11-20 17:39:22,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 104 transitions, 719 flow [2024-11-20 17:39:22,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:39:22,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:39:22,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 230 transitions. [2024-11-20 17:39:22,083 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5287356321839081 [2024-11-20 17:39:22,083 INFO L175 Difference]: Start difference. First operand has 119 places, 108 transitions, 571 flow. Second operand 5 states and 230 transitions. [2024-11-20 17:39:22,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 104 transitions, 719 flow [2024-11-20 17:39:22,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 104 transitions, 670 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-11-20 17:39:22,100 INFO L231 Difference]: Finished difference. Result has 115 places, 104 transitions, 542 flow [2024-11-20 17:39:22,100 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=514, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=542, PETRI_PLACES=115, PETRI_TRANSITIONS=104} [2024-11-20 17:39:22,100 INFO L277 CegarLoopForPetriNet]: 84 programPoint places, 31 predicate places. [2024-11-20 17:39:22,101 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 104 transitions, 542 flow [2024-11-20 17:39:22,101 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:22,101 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:22,101 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:39:22,101 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-20 17:39:22,101 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-20 17:39:22,102 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:22,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1887404328, now seen corresponding path program 1 times [2024-11-20 17:39:22,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:22,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843074332] [2024-11-20 17:39:22,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:22,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:22,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:22,327 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:39:22,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:22,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843074332] [2024-11-20 17:39:22,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843074332] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:39:22,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561660450] [2024-11-20 17:39:22,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:22,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:39:22,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:39:22,331 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:39:22,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-20 17:39:22,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:22,420 INFO L255 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-20 17:39:22,422 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:39:22,429 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-20 17:39:22,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 17:39:22,479 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-20 17:39:22,488 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 17:39:22,489 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-20 17:39:22,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:39:22,536 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:39:22,628 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2024-11-20 17:39:22,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:39:22,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561660450] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:39:22,682 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:39:22,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-20 17:39:22,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282972061] [2024-11-20 17:39:22,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:39:22,683 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-20 17:39:22,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:22,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-20 17:39:22,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-20 17:39:23,919 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 87 [2024-11-20 17:39:23,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 104 transitions, 542 flow. Second operand has 13 states, 13 states have (on average 42.92307692307692) internal successors, (558), 13 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:23,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:23,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 87 [2024-11-20 17:39:23,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:25,710 INFO L124 PetriNetUnfolderBase]: 6724/11535 cut-off events. [2024-11-20 17:39:25,710 INFO L125 PetriNetUnfolderBase]: For 7983/7983 co-relation queries the response was YES. [2024-11-20 17:39:25,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26284 conditions, 11535 events. 6724/11535 cut-off events. For 7983/7983 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 82963 event pairs, 2535 based on Foata normal form. 0/9956 useless extension candidates. Maximal degree in co-relation 17425. Up to 3385 conditions per place. [2024-11-20 17:39:25,795 INFO L140 encePairwiseOnDemand]: 75/87 looper letters, 130 selfloop transitions, 31 changer transitions 0/187 dead transitions. [2024-11-20 17:39:25,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 187 transitions, 1142 flow [2024-11-20 17:39:25,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 17:39:25,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-20 17:39:25,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 498 transitions. [2024-11-20 17:39:25,797 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6360153256704981 [2024-11-20 17:39:25,797 INFO L175 Difference]: Start difference. First operand has 115 places, 104 transitions, 542 flow. Second operand 9 states and 498 transitions. [2024-11-20 17:39:25,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 187 transitions, 1142 flow [2024-11-20 17:39:25,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 187 transitions, 1118 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-20 17:39:25,827 INFO L231 Difference]: Finished difference. Result has 121 places, 108 transitions, 630 flow [2024-11-20 17:39:25,827 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=520, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=630, PETRI_PLACES=121, PETRI_TRANSITIONS=108} [2024-11-20 17:39:25,827 INFO L277 CegarLoopForPetriNet]: 84 programPoint places, 37 predicate places. [2024-11-20 17:39:25,827 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 108 transitions, 630 flow [2024-11-20 17:39:25,828 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 42.92307692307692) internal successors, (558), 13 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:25,829 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:25,829 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:39:25,837 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-20 17:39:26,032 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-20 17:39:26,036 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-20 17:39:26,036 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:26,037 INFO L85 PathProgramCache]: Analyzing trace with hash 101177133, now seen corresponding path program 1 times [2024-11-20 17:39:26,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:26,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299737747] [2024-11-20 17:39:26,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:26,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:26,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:26,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:39:26,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:26,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299737747] [2024-11-20 17:39:26,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299737747] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:39:26,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:39:26,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-20 17:39:26,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846882983] [2024-11-20 17:39:26,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:39:26,218 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:39:26,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:26,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:39:26,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 17:39:26,263 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 87 [2024-11-20 17:39:26,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 108 transitions, 630 flow. Second operand has 5 states, 5 states have (on average 48.6) internal successors, (243), 5 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:26,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:26,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 87 [2024-11-20 17:39:26,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:27,093 INFO L124 PetriNetUnfolderBase]: 5708/10420 cut-off events. [2024-11-20 17:39:27,094 INFO L125 PetriNetUnfolderBase]: For 10692/10752 co-relation queries the response was YES. [2024-11-20 17:39:27,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24519 conditions, 10420 events. 5708/10420 cut-off events. For 10692/10752 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 76614 event pairs, 3414 based on Foata normal form. 140/9019 useless extension candidates. Maximal degree in co-relation 16001. Up to 5417 conditions per place. [2024-11-20 17:39:27,224 INFO L140 encePairwiseOnDemand]: 82/87 looper letters, 108 selfloop transitions, 15 changer transitions 0/151 dead transitions. [2024-11-20 17:39:27,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 151 transitions, 1086 flow [2024-11-20 17:39:27,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:39:27,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:39:27,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 307 transitions. [2024-11-20 17:39:27,231 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7057471264367816 [2024-11-20 17:39:27,231 INFO L175 Difference]: Start difference. First operand has 121 places, 108 transitions, 630 flow. Second operand 5 states and 307 transitions. [2024-11-20 17:39:27,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 151 transitions, 1086 flow [2024-11-20 17:39:27,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 151 transitions, 1017 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-11-20 17:39:27,268 INFO L231 Difference]: Finished difference. Result has 121 places, 110 transitions, 629 flow [2024-11-20 17:39:27,271 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=575, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=629, PETRI_PLACES=121, PETRI_TRANSITIONS=110} [2024-11-20 17:39:27,271 INFO L277 CegarLoopForPetriNet]: 84 programPoint places, 37 predicate places. [2024-11-20 17:39:27,271 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 110 transitions, 629 flow [2024-11-20 17:39:27,272 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.6) internal successors, (243), 5 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:27,272 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:27,272 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:39:27,272 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-20 17:39:27,272 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-20 17:39:27,272 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:27,272 INFO L85 PathProgramCache]: Analyzing trace with hash -355185525, now seen corresponding path program 1 times [2024-11-20 17:39:27,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:27,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062054512] [2024-11-20 17:39:27,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:27,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:27,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:27,936 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:39:27,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:27,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062054512] [2024-11-20 17:39:27,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062054512] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:39:27,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81198930] [2024-11-20 17:39:27,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:27,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:39:27,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:39:27,957 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:39:27,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-20 17:39:28,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:28,074 INFO L255 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-20 17:39:28,080 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:39:28,091 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-20 17:39:28,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 17:39:28,173 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-20 17:39:28,187 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 17:39:28,188 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-20 17:39:28,223 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-20 17:39:28,223 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 14 treesize of output 13 [2024-11-20 17:39:28,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:39:28,348 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:39:28,658 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 46 treesize of output 42 [2024-11-20 17:39:28,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:39:28,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81198930] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:39:28,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:39:28,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6] total 13 [2024-11-20 17:39:28,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026177449] [2024-11-20 17:39:28,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:39:28,761 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-20 17:39:28,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:28,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-20 17:39:28,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2024-11-20 17:39:32,840 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-20 17:39:36,851 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-20 17:39:41,062 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-20 17:39:45,278 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-20 17:39:49,346 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-20 17:39:53,408 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-20 17:39:57,457 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-20 17:40:01,702 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-20 17:40:05,812 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-20 17:40:09,877 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-20 17:40:13,934 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-20 17:40:17,964 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-20 17:40:21,993 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-20 17:40:22,012 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 87 [2024-11-20 17:40:22,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 110 transitions, 629 flow. Second operand has 15 states, 15 states have (on average 27.2) internal successors, (408), 15 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:40:22,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:40:22,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 87 [2024-11-20 17:40:22,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:40:25,600 INFO L124 PetriNetUnfolderBase]: 19722/31327 cut-off events. [2024-11-20 17:40:25,600 INFO L125 PetriNetUnfolderBase]: For 25921/26249 co-relation queries the response was YES. [2024-11-20 17:40:25,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72149 conditions, 31327 events. 19722/31327 cut-off events. For 25921/26249 co-relation queries the response was YES. Maximal size of possible extension queue 1005. Compared 230876 event pairs, 6727 based on Foata normal form. 0/26912 useless extension candidates. Maximal degree in co-relation 56529. Up to 9365 conditions per place. [2024-11-20 17:40:25,805 INFO L140 encePairwiseOnDemand]: 75/87 looper letters, 171 selfloop transitions, 31 changer transitions 0/219 dead transitions. [2024-11-20 17:40:25,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 219 transitions, 1424 flow [2024-11-20 17:40:25,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-20 17:40:25,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-20 17:40:25,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 410 transitions. [2024-11-20 17:40:25,809 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47126436781609193 [2024-11-20 17:40:25,809 INFO L175 Difference]: Start difference. First operand has 121 places, 110 transitions, 629 flow. Second operand 10 states and 410 transitions. [2024-11-20 17:40:25,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 219 transitions, 1424 flow [2024-11-20 17:40:25,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 219 transitions, 1400 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:40:25,851 INFO L231 Difference]: Finished difference. Result has 130 places, 112 transitions, 698 flow [2024-11-20 17:40:25,851 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=605, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=698, PETRI_PLACES=130, PETRI_TRANSITIONS=112} [2024-11-20 17:40:25,852 INFO L277 CegarLoopForPetriNet]: 84 programPoint places, 46 predicate places. [2024-11-20 17:40:25,852 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 112 transitions, 698 flow [2024-11-20 17:40:25,852 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 27.2) internal successors, (408), 15 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:40:25,852 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:40:25,853 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:40:25,862 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-20 17:40:26,057 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-20 17:40:26,058 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-20 17:40:26,058 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:40:26,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1874151482, now seen corresponding path program 1 times [2024-11-20 17:40:26,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:40:26,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685477842] [2024-11-20 17:40:26,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:40:26,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:40:26,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:40:26,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:40:26,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:40:26,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685477842] [2024-11-20 17:40:26,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685477842] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:40:26,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219649495] [2024-11-20 17:40:26,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:40:26,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:40:26,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:40:26,265 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:40:26,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-20 17:40:26,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:40:26,346 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-20 17:40:26,347 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:40:26,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:40:26,401 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:40:26,435 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-20 17:40:26,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:40:26,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219649495] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:40:26,443 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:40:26,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-11-20 17:40:26,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134903172] [2024-11-20 17:40:26,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:40:26,443 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-20 17:40:26,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:40:26,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-20 17:40:26,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-20 17:40:26,802 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 87 [2024-11-20 17:40:26,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 112 transitions, 698 flow. Second operand has 11 states, 11 states have (on average 46.18181818181818) internal successors, (508), 11 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:40:26,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:40:26,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 87 [2024-11-20 17:40:26,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:40:28,075 INFO L124 PetriNetUnfolderBase]: 9574/16413 cut-off events. [2024-11-20 17:40:28,075 INFO L125 PetriNetUnfolderBase]: For 19209/19677 co-relation queries the response was YES. [2024-11-20 17:40:28,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39726 conditions, 16413 events. 9574/16413 cut-off events. For 19209/19677 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 121244 event pairs, 3782 based on Foata normal form. 0/15057 useless extension candidates. Maximal degree in co-relation 28050. Up to 4486 conditions per place. [2024-11-20 17:40:28,320 INFO L140 encePairwiseOnDemand]: 75/87 looper letters, 130 selfloop transitions, 31 changer transitions 0/187 dead transitions. [2024-11-20 17:40:28,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 187 transitions, 1314 flow [2024-11-20 17:40:28,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 17:40:28,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-20 17:40:28,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 427 transitions. [2024-11-20 17:40:28,323 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7011494252873564 [2024-11-20 17:40:28,323 INFO L175 Difference]: Start difference. First operand has 130 places, 112 transitions, 698 flow. Second operand 7 states and 427 transitions. [2024-11-20 17:40:28,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 187 transitions, 1314 flow [2024-11-20 17:40:28,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 187 transitions, 1262 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-11-20 17:40:28,350 INFO L231 Difference]: Finished difference. Result has 132 places, 112 transitions, 728 flow [2024-11-20 17:40:28,350 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=644, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=728, PETRI_PLACES=132, PETRI_TRANSITIONS=112} [2024-11-20 17:40:28,351 INFO L277 CegarLoopForPetriNet]: 84 programPoint places, 48 predicate places. [2024-11-20 17:40:28,351 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 112 transitions, 728 flow [2024-11-20 17:40:28,351 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 46.18181818181818) internal successors, (508), 11 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:40:28,351 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:40:28,351 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:40:28,361 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-20 17:40:28,552 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:40:28,552 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-20 17:40:28,552 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:40:28,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1874151481, now seen corresponding path program 1 times [2024-11-20 17:40:28,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:40:28,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613336662] [2024-11-20 17:40:28,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:40:28,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:40:28,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:40:28,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:40:28,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:40:28,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613336662] [2024-11-20 17:40:28,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613336662] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:40:28,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:40:28,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 17:40:28,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262158725] [2024-11-20 17:40:28,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:40:28,603 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:40:28,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:40:28,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:40:28,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:40:28,695 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 87 [2024-11-20 17:40:28,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 112 transitions, 728 flow. Second operand has 4 states, 4 states have (on average 41.25) internal successors, (165), 4 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:40:28,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:40:28,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 87 [2024-11-20 17:40:28,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:40:30,011 INFO L124 PetriNetUnfolderBase]: 10028/17769 cut-off events. [2024-11-20 17:40:30,011 INFO L125 PetriNetUnfolderBase]: For 22968/23466 co-relation queries the response was YES. [2024-11-20 17:40:30,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44133 conditions, 17769 events. 10028/17769 cut-off events. For 22968/23466 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 136451 event pairs, 8388 based on Foata normal form. 356/16851 useless extension candidates. Maximal degree in co-relation 32727. Up to 14506 conditions per place. [2024-11-20 17:40:30,145 INFO L140 encePairwiseOnDemand]: 81/87 looper letters, 73 selfloop transitions, 13 changer transitions 0/108 dead transitions. [2024-11-20 17:40:30,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 108 transitions, 892 flow [2024-11-20 17:40:30,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 17:40:30,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 17:40:30,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 196 transitions. [2024-11-20 17:40:30,146 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5632183908045977 [2024-11-20 17:40:30,146 INFO L175 Difference]: Start difference. First operand has 132 places, 112 transitions, 728 flow. Second operand 4 states and 196 transitions. [2024-11-20 17:40:30,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 108 transitions, 892 flow [2024-11-20 17:40:30,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 108 transitions, 835 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-11-20 17:40:30,176 INFO L231 Difference]: Finished difference. Result has 125 places, 108 transitions, 689 flow [2024-11-20 17:40:30,176 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=663, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=689, PETRI_PLACES=125, PETRI_TRANSITIONS=108} [2024-11-20 17:40:30,176 INFO L277 CegarLoopForPetriNet]: 84 programPoint places, 41 predicate places. [2024-11-20 17:40:30,176 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 108 transitions, 689 flow [2024-11-20 17:40:30,177 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.25) internal successors, (165), 4 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:40:30,177 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:40:30,177 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:40:30,177 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-20 17:40:30,177 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-20 17:40:30,177 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:40:30,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1135416690, now seen corresponding path program 1 times [2024-11-20 17:40:30,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:40:30,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925494609] [2024-11-20 17:40:30,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:40:30,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:40:30,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:40:30,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:40:30,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:40:30,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925494609] [2024-11-20 17:40:30,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925494609] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:40:30,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177655551] [2024-11-20 17:40:30,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:40:30,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:40:30,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:40:30,345 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:40:30,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-20 17:40:30,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:40:30,458 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-20 17:40:30,459 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:40:30,466 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-20 17:40:30,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 17:40:30,512 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-20 17:40:30,520 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 17:40:30,520 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11