./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/06-symbeq_02-funloop_norace.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 61a67961 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/goblint-regression/06-symbeq_02-funloop_norace.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ebedbc62bd44b0c214a81c07c6f99e850a5d96675b77716f8547d1b39e8b2cf8 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 19:41:07,950 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 19:41:08,033 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-14 19:41:08,038 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 19:41:08,038 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 19:41:08,060 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 19:41:08,060 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 19:41:08,061 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 19:41:08,061 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 19:41:08,061 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 19:41:08,062 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 19:41:08,063 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 19:41:08,064 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 19:41:08,067 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 19:41:08,068 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 19:41:08,068 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 19:41:08,068 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 19:41:08,068 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 19:41:08,069 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 19:41:08,069 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 19:41:08,069 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-14 19:41:08,071 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-14 19:41:08,071 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-14 19:41:08,071 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 19:41:08,071 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-14 19:41:08,071 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 19:41:08,072 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-14 19:41:08,072 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 19:41:08,072 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 19:41:08,072 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 19:41:08,073 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 19:41:08,073 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 19:41:08,073 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 19:41:08,073 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 19:41:08,074 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 19:41:08,074 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 19:41:08,074 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-14 19:41:08,075 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-14 19:41:08,075 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 19:41:08,075 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 19:41:08,076 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 19:41:08,076 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 19:41:08,076 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ebedbc62bd44b0c214a81c07c6f99e850a5d96675b77716f8547d1b39e8b2cf8 [2024-10-14 19:41:08,332 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 19:41:08,361 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 19:41:08,365 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 19:41:08,366 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 19:41:08,366 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 19:41:08,368 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/06-symbeq_02-funloop_norace.i [2024-10-14 19:41:09,877 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 19:41:10,152 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 19:41:10,153 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/06-symbeq_02-funloop_norace.i [2024-10-14 19:41:10,168 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee4614b12/1f9c8cdf1b924a9e8cc127e9c5350486/FLAG5b5d83b85 [2024-10-14 19:41:10,459 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee4614b12/1f9c8cdf1b924a9e8cc127e9c5350486 [2024-10-14 19:41:10,461 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 19:41:10,462 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 19:41:10,464 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 19:41:10,464 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 19:41:10,469 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 19:41:10,470 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:41:10" (1/1) ... [2024-10-14 19:41:10,471 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@278d566f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:41:10, skipping insertion in model container [2024-10-14 19:41:10,471 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:41:10" (1/1) ... [2024-10-14 19:41:10,525 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 19:41:10,973 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 19:41:11,005 INFO L200 MainTranslator]: Completed pre-run [2024-10-14 19:41:11,059 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 19:41:11,121 INFO L204 MainTranslator]: Completed translation [2024-10-14 19:41:11,122 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:41:11 WrapperNode [2024-10-14 19:41:11,122 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 19:41:11,123 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-14 19:41:11,123 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-14 19:41:11,124 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-14 19:41:11,131 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:41:11" (1/1) ... [2024-10-14 19:41:11,145 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:41:11" (1/1) ... [2024-10-14 19:41:11,170 INFO L138 Inliner]: procedures = 262, calls = 10, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 73 [2024-10-14 19:41:11,171 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-14 19:41:11,172 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-14 19:41:11,172 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-14 19:41:11,172 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-14 19:41:11,189 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:41:11" (1/1) ... [2024-10-14 19:41:11,190 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:41:11" (1/1) ... [2024-10-14 19:41:11,197 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:41:11" (1/1) ... [2024-10-14 19:41:11,214 INFO L175 MemorySlicer]: Split 5 memory accesses to 1 slices as follows [5]. 100 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0]. The 3 writes are split as follows [3]. [2024-10-14 19:41:11,214 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:41:11" (1/1) ... [2024-10-14 19:41:11,215 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:41:11" (1/1) ... [2024-10-14 19:41:11,256 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:41:11" (1/1) ... [2024-10-14 19:41:11,269 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:41:11" (1/1) ... [2024-10-14 19:41:11,272 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:41:11" (1/1) ... [2024-10-14 19:41:11,277 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:41:11" (1/1) ... [2024-10-14 19:41:11,279 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-14 19:41:11,280 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-14 19:41:11,281 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-14 19:41:11,281 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-14 19:41:11,282 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:41:11" (1/1) ... [2024-10-14 19:41:11,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 19:41:11,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 19:41:11,315 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-14 19:41:11,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-14 19:41:11,370 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-10-14 19:41:11,371 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-14 19:41:11,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-14 19:41:11,371 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-10-14 19:41:11,372 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-14 19:41:11,372 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-10-14 19:41:11,372 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-10-14 19:41:11,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-14 19:41:11,373 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-14 19:41:11,374 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-14 19:41:11,488 INFO L238 CfgBuilder]: Building ICFG [2024-10-14 19:41:11,490 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-14 19:41:11,668 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-14 19:41:11,669 INFO L287 CfgBuilder]: Performing block encoding [2024-10-14 19:41:11,771 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-14 19:41:11,771 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-14 19:41:11,772 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 07:41:11 BoogieIcfgContainer [2024-10-14 19:41:11,772 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-14 19:41:11,774 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-14 19:41:11,774 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-14 19:41:11,778 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-14 19:41:11,778 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 07:41:10" (1/3) ... [2024-10-14 19:41:11,779 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13b44b49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 07:41:11, skipping insertion in model container [2024-10-14 19:41:11,779 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:41:11" (2/3) ... [2024-10-14 19:41:11,780 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13b44b49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 07:41:11, skipping insertion in model container [2024-10-14 19:41:11,781 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 07:41:11" (3/3) ... [2024-10-14 19:41:11,782 INFO L112 eAbstractionObserver]: Analyzing ICFG 06-symbeq_02-funloop_norace.i [2024-10-14 19:41:11,797 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-14 19:41:11,797 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2024-10-14 19:41:11,797 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-14 19:41:11,834 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-14 19:41:11,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 34 places, 33 transitions, 70 flow [2024-10-14 19:41:11,891 INFO L124 PetriNetUnfolderBase]: 3/32 cut-off events. [2024-10-14 19:41:11,891 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-14 19:41:11,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 32 events. 3/32 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 70 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 28. Up to 2 conditions per place. [2024-10-14 19:41:11,894 INFO L82 GeneralOperation]: Start removeDead. Operand has 34 places, 33 transitions, 70 flow [2024-10-14 19:41:11,897 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 33 places, 32 transitions, 67 flow [2024-10-14 19:41:11,911 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 19:41:11,920 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;@43a6ddc1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 19:41:11,921 INFO L334 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2024-10-14 19:41:11,926 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-14 19:41:11,927 INFO L124 PetriNetUnfolderBase]: 1/11 cut-off events. [2024-10-14 19:41:11,927 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-14 19:41:11,928 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:41:11,929 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-14 19:41:11,929 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-10-14 19:41:11,934 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:41:11,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1418116249, now seen corresponding path program 1 times [2024-10-14 19:41:11,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 19:41:11,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239046077] [2024-10-14 19:41:11,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:41:11,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 19:41:12,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:41:12,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:41:12,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 19:41:12,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239046077] [2024-10-14 19:41:12,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239046077] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:41:12,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:41:12,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 19:41:12,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141649906] [2024-10-14 19:41:12,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:41:12,191 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 19:41:12,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 19:41:12,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 19:41:12,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 19:41:12,230 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 33 [2024-10-14 19:41:12,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 32 transitions, 67 flow. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:41:12,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:41:12,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 33 [2024-10-14 19:41:12,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:41:12,370 INFO L124 PetriNetUnfolderBase]: 74/203 cut-off events. [2024-10-14 19:41:12,370 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-14 19:41:12,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 357 conditions, 203 events. 74/203 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 912 event pairs, 56 based on Foata normal form. 0/163 useless extension candidates. Maximal degree in co-relation 342. Up to 149 conditions per place. [2024-10-14 19:41:12,376 INFO L140 encePairwiseOnDemand]: 30/33 looper letters, 20 selfloop transitions, 2 changer transitions 0/33 dead transitions. [2024-10-14 19:41:12,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 33 transitions, 113 flow [2024-10-14 19:41:12,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 19:41:12,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 19:41:12,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 59 transitions. [2024-10-14 19:41:12,388 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5959595959595959 [2024-10-14 19:41:12,390 INFO L175 Difference]: Start difference. First operand has 33 places, 32 transitions, 67 flow. Second operand 3 states and 59 transitions. [2024-10-14 19:41:12,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 33 transitions, 113 flow [2024-10-14 19:41:12,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 33 transitions, 112 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-14 19:41:12,397 INFO L231 Difference]: Finished difference. Result has 35 places, 33 transitions, 78 flow [2024-10-14 19:41:12,399 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=35, PETRI_TRANSITIONS=33} [2024-10-14 19:41:12,404 INFO L277 CegarLoopForPetriNet]: 33 programPoint places, 2 predicate places. [2024-10-14 19:41:12,406 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 33 transitions, 78 flow [2024-10-14 19:41:12,407 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:41:12,407 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:41:12,407 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:41:12,407 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-14 19:41:12,407 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-10-14 19:41:12,408 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:41:12,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1075669586, now seen corresponding path program 1 times [2024-10-14 19:41:12,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 19:41:12,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227121631] [2024-10-14 19:41:12,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:41:12,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 19:41:12,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:41:12,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:41:12,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 19:41:12,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227121631] [2024-10-14 19:41:12,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227121631] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 19:41:12,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890217353] [2024-10-14 19:41:12,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:41:12,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 19:41:12,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 19:41:12,519 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 19:41:12,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-14 19:41:12,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:41:12,603 INFO L255 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-14 19:41:12,606 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:41:12,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 19:41:12,625 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:41:12,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890217353] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:41:12,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-14 19:41:12,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2024-10-14 19:41:12,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050829118] [2024-10-14 19:41:12,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:41:12,628 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 19:41:12,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 19:41:12,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 19:41:12,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-14 19:41:12,630 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 33 [2024-10-14 19:41:12,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 33 transitions, 78 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:41:12,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:41:12,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 33 [2024-10-14 19:41:12,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:41:12,817 INFO L124 PetriNetUnfolderBase]: 122/334 cut-off events. [2024-10-14 19:41:12,817 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-14 19:41:12,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 590 conditions, 334 events. 122/334 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1496 event pairs, 61 based on Foata normal form. 0/277 useless extension candidates. Maximal degree in co-relation 579. Up to 150 conditions per place. [2024-10-14 19:41:12,823 INFO L140 encePairwiseOnDemand]: 30/33 looper letters, 34 selfloop transitions, 2 changer transitions 0/47 dead transitions. [2024-10-14 19:41:12,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 47 transitions, 178 flow [2024-10-14 19:41:12,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 19:41:12,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 19:41:12,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2024-10-14 19:41:12,827 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7272727272727273 [2024-10-14 19:41:12,827 INFO L175 Difference]: Start difference. First operand has 35 places, 33 transitions, 78 flow. Second operand 3 states and 72 transitions. [2024-10-14 19:41:12,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 47 transitions, 178 flow [2024-10-14 19:41:12,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 47 transitions, 174 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-14 19:41:12,832 INFO L231 Difference]: Finished difference. Result has 37 places, 34 transitions, 86 flow [2024-10-14 19:41:12,832 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=37, PETRI_TRANSITIONS=34} [2024-10-14 19:41:12,833 INFO L277 CegarLoopForPetriNet]: 33 programPoint places, 4 predicate places. [2024-10-14 19:41:12,833 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 34 transitions, 86 flow [2024-10-14 19:41:12,833 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:41:12,833 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:41:12,833 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:41:12,851 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-14 19:41:13,034 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 19:41:13,035 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-10-14 19:41:13,036 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:41:13,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1384393546, now seen corresponding path program 1 times [2024-10-14 19:41:13,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 19:41:13,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039332716] [2024-10-14 19:41:13,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:41:13,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 19:41:13,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:41:13,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:41:13,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 19:41:13,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039332716] [2024-10-14 19:41:13,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039332716] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 19:41:13,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762066457] [2024-10-14 19:41:13,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:41:13,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 19:41:13,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 19:41:13,126 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 19:41:13,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-14 19:41:13,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:41:13,199 INFO L255 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-14 19:41:13,200 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:41:13,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:41:13,224 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:41:13,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:41:13,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762066457] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:41:13,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 19:41:13,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2024-10-14 19:41:13,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556355714] [2024-10-14 19:41:13,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 19:41:13,253 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-14 19:41:13,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 19:41:13,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-14 19:41:13,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-10-14 19:41:13,255 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 33 [2024-10-14 19:41:13,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 34 transitions, 86 flow. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:41:13,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:41:13,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 33 [2024-10-14 19:41:13,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:41:13,373 INFO L124 PetriNetUnfolderBase]: 122/341 cut-off events. [2024-10-14 19:41:13,373 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2024-10-14 19:41:13,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 642 conditions, 341 events. 122/341 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1531 event pairs, 98 based on Foata normal form. 0/290 useless extension candidates. Maximal degree in co-relation 617. Up to 245 conditions per place. [2024-10-14 19:41:13,379 INFO L140 encePairwiseOnDemand]: 30/33 looper letters, 21 selfloop transitions, 5 changer transitions 0/37 dead transitions. [2024-10-14 19:41:13,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 37 transitions, 150 flow [2024-10-14 19:41:13,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-14 19:41:13,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-14 19:41:13,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 100 transitions. [2024-10-14 19:41:13,383 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5050505050505051 [2024-10-14 19:41:13,383 INFO L175 Difference]: Start difference. First operand has 37 places, 34 transitions, 86 flow. Second operand 6 states and 100 transitions. [2024-10-14 19:41:13,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 37 transitions, 150 flow [2024-10-14 19:41:13,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 37 transitions, 148 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-14 19:41:13,386 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 120 flow [2024-10-14 19:41:13,387 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=120, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-10-14 19:41:13,388 INFO L277 CegarLoopForPetriNet]: 33 programPoint places, 11 predicate places. [2024-10-14 19:41:13,389 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 120 flow [2024-10-14 19:41:13,389 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:41:13,389 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:41:13,389 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:41:13,407 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-14 19:41:13,590 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,SelfDestructingSolverStorable2 [2024-10-14 19:41:13,591 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-10-14 19:41:13,591 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:41:13,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1979926397, now seen corresponding path program 2 times [2024-10-14 19:41:13,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 19:41:13,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893391234] [2024-10-14 19:41:13,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:41:13,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 19:41:13,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:41:13,738 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-14 19:41:13,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 19:41:13,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893391234] [2024-10-14 19:41:13,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893391234] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:41:13,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:41:13,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 19:41:13,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455682661] [2024-10-14 19:41:13,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:41:13,740 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 19:41:13,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 19:41:13,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 19:41:13,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 19:41:13,762 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 33 [2024-10-14 19:41:13,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 120 flow. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:41:13,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:41:13,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 33 [2024-10-14 19:41:13,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:41:13,874 INFO L124 PetriNetUnfolderBase]: 122/326 cut-off events. [2024-10-14 19:41:13,874 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2024-10-14 19:41:13,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 634 conditions, 326 events. 122/326 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1455 event pairs, 28 based on Foata normal form. 0/299 useless extension candidates. Maximal degree in co-relation 600. Up to 150 conditions per place. [2024-10-14 19:41:13,877 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 33 selfloop transitions, 3 changer transitions 0/45 dead transitions. [2024-10-14 19:41:13,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 45 transitions, 216 flow [2024-10-14 19:41:13,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 19:41:13,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 19:41:13,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 72 transitions. [2024-10-14 19:41:13,879 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-10-14 19:41:13,879 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 120 flow. Second operand 4 states and 72 transitions. [2024-10-14 19:41:13,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 45 transitions, 216 flow [2024-10-14 19:41:13,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 45 transitions, 202 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-10-14 19:41:13,882 INFO L231 Difference]: Finished difference. Result has 44 places, 35 transitions, 108 flow [2024-10-14 19:41:13,882 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=108, PETRI_PLACES=44, PETRI_TRANSITIONS=35} [2024-10-14 19:41:13,883 INFO L277 CegarLoopForPetriNet]: 33 programPoint places, 11 predicate places. [2024-10-14 19:41:13,883 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 35 transitions, 108 flow [2024-10-14 19:41:13,883 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:41:13,883 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:41:13,883 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:41:13,884 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-14 19:41:13,884 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-10-14 19:41:13,885 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:41:13,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1979926396, now seen corresponding path program 1 times [2024-10-14 19:41:13,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 19:41:13,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489399449] [2024-10-14 19:41:13,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:41:13,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 19:41:13,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:41:13,998 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:41:13,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 19:41:13,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489399449] [2024-10-14 19:41:13,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489399449] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 19:41:13,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049025825] [2024-10-14 19:41:13,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:41:13,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 19:41:13,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 19:41:14,001 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 19:41:14,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-14 19:41:14,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:41:14,065 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-14 19:41:14,066 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:41:14,081 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:41:14,081 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:41:14,147 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:41:14,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049025825] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:41:14,148 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 19:41:14,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2024-10-14 19:41:14,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704120162] [2024-10-14 19:41:14,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 19:41:14,149 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-14 19:41:14,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 19:41:14,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-14 19:41:14,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2024-10-14 19:41:14,151 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 33 [2024-10-14 19:41:14,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 35 transitions, 108 flow. Second operand has 12 states, 12 states have (on average 13.333333333333334) internal successors, (160), 12 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:41:14,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:41:14,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 33 [2024-10-14 19:41:14,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:41:14,278 INFO L124 PetriNetUnfolderBase]: 122/341 cut-off events. [2024-10-14 19:41:14,279 INFO L125 PetriNetUnfolderBase]: For 55/55 co-relation queries the response was YES. [2024-10-14 19:41:14,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 692 conditions, 341 events. 122/341 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1475 event pairs, 98 based on Foata normal form. 6/318 useless extension candidates. Maximal degree in co-relation 639. Up to 245 conditions per place. [2024-10-14 19:41:14,281 INFO L140 encePairwiseOnDemand]: 30/33 looper letters, 21 selfloop transitions, 11 changer transitions 0/41 dead transitions. [2024-10-14 19:41:14,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 41 transitions, 208 flow [2024-10-14 19:41:14,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-14 19:41:14,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-14 19:41:14,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 181 transitions. [2024-10-14 19:41:14,285 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45707070707070707 [2024-10-14 19:41:14,285 INFO L175 Difference]: Start difference. First operand has 44 places, 35 transitions, 108 flow. Second operand 12 states and 181 transitions. [2024-10-14 19:41:14,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 41 transitions, 208 flow [2024-10-14 19:41:14,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 41 transitions, 202 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-14 19:41:14,289 INFO L231 Difference]: Finished difference. Result has 58 places, 41 transitions, 186 flow [2024-10-14 19:41:14,289 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=186, PETRI_PLACES=58, PETRI_TRANSITIONS=41} [2024-10-14 19:41:14,290 INFO L277 CegarLoopForPetriNet]: 33 programPoint places, 25 predicate places. [2024-10-14 19:41:14,291 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 41 transitions, 186 flow [2024-10-14 19:41:14,292 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 13.333333333333334) internal successors, (160), 12 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:41:14,292 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:41:14,292 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:41:14,309 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-14 19:41:14,492 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 19:41:14,493 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-10-14 19:41:14,493 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:41:14,493 INFO L85 PathProgramCache]: Analyzing trace with hash 320140068, now seen corresponding path program 2 times [2024-10-14 19:41:14,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 19:41:14,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517047667] [2024-10-14 19:41:14,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:41:14,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 19:41:14,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:41:14,707 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-14 19:41:14,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 19:41:14,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517047667] [2024-10-14 19:41:14,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517047667] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:41:14,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:41:14,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 19:41:14,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199415579] [2024-10-14 19:41:14,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:41:14,709 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 19:41:14,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 19:41:14,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 19:41:14,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-14 19:41:14,736 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 33 [2024-10-14 19:41:14,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 41 transitions, 186 flow. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:41:14,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:41:14,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 33 [2024-10-14 19:41:14,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:41:14,917 INFO L124 PetriNetUnfolderBase]: 242/547 cut-off events. [2024-10-14 19:41:14,917 INFO L125 PetriNetUnfolderBase]: For 88/88 co-relation queries the response was YES. [2024-10-14 19:41:14,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1169 conditions, 547 events. 242/547 cut-off events. For 88/88 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2408 event pairs, 126 based on Foata normal form. 0/494 useless extension candidates. Maximal degree in co-relation 1093. Up to 314 conditions per place. [2024-10-14 19:41:14,922 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 56 selfloop transitions, 4 changer transitions 0/67 dead transitions. [2024-10-14 19:41:14,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 67 transitions, 374 flow [2024-10-14 19:41:14,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 19:41:14,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-14 19:41:14,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 100 transitions. [2024-10-14 19:41:14,924 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6060606060606061 [2024-10-14 19:41:14,924 INFO L175 Difference]: Start difference. First operand has 58 places, 41 transitions, 186 flow. Second operand 5 states and 100 transitions. [2024-10-14 19:41:14,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 67 transitions, 374 flow [2024-10-14 19:41:14,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 67 transitions, 326 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-10-14 19:41:14,929 INFO L231 Difference]: Finished difference. Result has 59 places, 43 transitions, 164 flow [2024-10-14 19:41:14,930 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=164, PETRI_PLACES=59, PETRI_TRANSITIONS=43} [2024-10-14 19:41:14,932 INFO L277 CegarLoopForPetriNet]: 33 programPoint places, 26 predicate places. [2024-10-14 19:41:14,932 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 43 transitions, 164 flow [2024-10-14 19:41:14,933 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:41:14,933 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:41:14,933 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:41:14,934 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-14 19:41:14,934 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-10-14 19:41:14,935 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:41:14,935 INFO L85 PathProgramCache]: Analyzing trace with hash 304364566, now seen corresponding path program 1 times [2024-10-14 19:41:14,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 19:41:14,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549676057] [2024-10-14 19:41:14,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:41:14,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 19:41:14,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:41:15,048 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-14 19:41:15,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 19:41:15,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549676057] [2024-10-14 19:41:15,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549676057] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:41:15,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:41:15,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 19:41:15,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841618993] [2024-10-14 19:41:15,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:41:15,050 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 19:41:15,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 19:41:15,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 19:41:15,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 19:41:15,066 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 33 [2024-10-14 19:41:15,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 43 transitions, 164 flow. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:41:15,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:41:15,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 33 [2024-10-14 19:41:15,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:41:15,198 INFO L124 PetriNetUnfolderBase]: 212/541 cut-off events. [2024-10-14 19:41:15,198 INFO L125 PetriNetUnfolderBase]: For 188/188 co-relation queries the response was YES. [2024-10-14 19:41:15,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1202 conditions, 541 events. 212/541 cut-off events. For 188/188 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2628 event pairs, 52 based on Foata normal form. 0/526 useless extension candidates. Maximal degree in co-relation 1147. Up to 280 conditions per place. [2024-10-14 19:41:15,203 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 40 selfloop transitions, 4 changer transitions 0/51 dead transitions. [2024-10-14 19:41:15,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 51 transitions, 284 flow [2024-10-14 19:41:15,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 19:41:15,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 19:41:15,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 71 transitions. [2024-10-14 19:41:15,204 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5378787878787878 [2024-10-14 19:41:15,204 INFO L175 Difference]: Start difference. First operand has 59 places, 43 transitions, 164 flow. Second operand 4 states and 71 transitions. [2024-10-14 19:41:15,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 51 transitions, 284 flow [2024-10-14 19:41:15,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 51 transitions, 278 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-14 19:41:15,207 INFO L231 Difference]: Finished difference. Result has 58 places, 41 transitions, 164 flow [2024-10-14 19:41:15,208 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=164, PETRI_PLACES=58, PETRI_TRANSITIONS=41} [2024-10-14 19:41:15,208 INFO L277 CegarLoopForPetriNet]: 33 programPoint places, 25 predicate places. [2024-10-14 19:41:15,208 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 41 transitions, 164 flow [2024-10-14 19:41:15,209 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:41:15,209 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:41:15,209 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:41:15,209 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-14 19:41:15,209 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-10-14 19:41:15,210 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:41:15,210 INFO L85 PathProgramCache]: Analyzing trace with hash 304364567, now seen corresponding path program 1 times [2024-10-14 19:41:15,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 19:41:15,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958053901] [2024-10-14 19:41:15,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:41:15,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 19:41:15,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:41:15,388 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-14 19:41:15,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 19:41:15,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958053901] [2024-10-14 19:41:15,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958053901] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:41:15,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:41:15,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 19:41:15,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57526760] [2024-10-14 19:41:15,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:41:15,394 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 19:41:15,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 19:41:15,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 19:41:15,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-14 19:41:15,416 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 33 [2024-10-14 19:41:15,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 41 transitions, 164 flow. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:41:15,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:41:15,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 33 [2024-10-14 19:41:15,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:41:15,567 INFO L124 PetriNetUnfolderBase]: 240/540 cut-off events. [2024-10-14 19:41:15,568 INFO L125 PetriNetUnfolderBase]: For 217/217 co-relation queries the response was YES. [2024-10-14 19:41:15,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1312 conditions, 540 events. 240/540 cut-off events. For 217/217 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 2378 event pairs, 130 based on Foata normal form. 0/495 useless extension candidates. Maximal degree in co-relation 1257. Up to 322 conditions per place. [2024-10-14 19:41:15,572 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 57 selfloop transitions, 4 changer transitions 0/66 dead transitions. [2024-10-14 19:41:15,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 66 transitions, 366 flow [2024-10-14 19:41:15,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 19:41:15,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-14 19:41:15,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 97 transitions. [2024-10-14 19:41:15,573 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5878787878787879 [2024-10-14 19:41:15,573 INFO L175 Difference]: Start difference. First operand has 58 places, 41 transitions, 164 flow. Second operand 5 states and 97 transitions. [2024-10-14 19:41:15,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 66 transitions, 366 flow [2024-10-14 19:41:15,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 66 transitions, 356 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-14 19:41:15,577 INFO L231 Difference]: Finished difference. Result has 61 places, 42 transitions, 176 flow [2024-10-14 19:41:15,577 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=176, PETRI_PLACES=61, PETRI_TRANSITIONS=42} [2024-10-14 19:41:15,578 INFO L277 CegarLoopForPetriNet]: 33 programPoint places, 28 predicate places. [2024-10-14 19:41:15,578 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 42 transitions, 176 flow [2024-10-14 19:41:15,578 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:41:15,578 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:41:15,578 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:41:15,578 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-14 19:41:15,578 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-10-14 19:41:15,579 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:41:15,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1013396048, now seen corresponding path program 1 times [2024-10-14 19:41:15,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 19:41:15,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88994876] [2024-10-14 19:41:15,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:41:15,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 19:41:15,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:41:15,615 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-10-14 19:41:15,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 19:41:15,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88994876] [2024-10-14 19:41:15,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88994876] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:41:15,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:41:15,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-14 19:41:15,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235717246] [2024-10-14 19:41:15,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:41:15,617 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 19:41:15,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 19:41:15,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 19:41:15,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 19:41:15,631 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 33 [2024-10-14 19:41:15,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 42 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:41:15,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:41:15,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 33 [2024-10-14 19:41:15,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:41:15,729 INFO L124 PetriNetUnfolderBase]: 212/508 cut-off events. [2024-10-14 19:41:15,729 INFO L125 PetriNetUnfolderBase]: For 283/283 co-relation queries the response was YES. [2024-10-14 19:41:15,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1276 conditions, 508 events. 212/508 cut-off events. For 283/283 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2245 event pairs, 182 based on Foata normal form. 0/492 useless extension candidates. Maximal degree in co-relation 1219. Up to 434 conditions per place. [2024-10-14 19:41:15,733 INFO L140 encePairwiseOnDemand]: 31/33 looper letters, 34 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2024-10-14 19:41:15,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 41 transitions, 244 flow [2024-10-14 19:41:15,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 19:41:15,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 19:41:15,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 55 transitions. [2024-10-14 19:41:15,734 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-10-14 19:41:15,734 INFO L175 Difference]: Start difference. First operand has 61 places, 42 transitions, 176 flow. Second operand 3 states and 55 transitions. [2024-10-14 19:41:15,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 41 transitions, 244 flow [2024-10-14 19:41:15,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 41 transitions, 238 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-14 19:41:15,736 INFO L231 Difference]: Finished difference. Result has 59 places, 41 transitions, 170 flow [2024-10-14 19:41:15,737 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=170, PETRI_PLACES=59, PETRI_TRANSITIONS=41} [2024-10-14 19:41:15,738 INFO L277 CegarLoopForPetriNet]: 33 programPoint places, 26 predicate places. [2024-10-14 19:41:15,738 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 41 transitions, 170 flow [2024-10-14 19:41:15,738 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:41:15,738 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:41:15,738 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:41:15,738 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-14 19:41:15,738 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-10-14 19:41:15,738 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:41:15,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1222943355, now seen corresponding path program 1 times [2024-10-14 19:41:15,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 19:41:15,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254114973] [2024-10-14 19:41:15,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:41:15,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 19:41:15,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:41:15,956 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-14 19:41:15,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 19:41:15,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254114973] [2024-10-14 19:41:15,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254114973] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 19:41:15,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076549482] [2024-10-14 19:41:15,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:41:15,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 19:41:15,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 19:41:15,960 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 19:41:15,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-14 19:41:16,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:41:16,051 INFO L255 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-14 19:41:16,053 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:41:16,309 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-14 19:41:16,309 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:41:16,514 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-14 19:41:16,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076549482] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:41:16,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 19:41:16,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2024-10-14 19:41:16,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492098238] [2024-10-14 19:41:16,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 19:41:16,515 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-14 19:41:16,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 19:41:16,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-14 19:41:16,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2024-10-14 19:41:16,627 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 33 [2024-10-14 19:41:16,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 41 transitions, 170 flow. Second operand has 14 states, 14 states have (on average 13.0) internal successors, (182), 14 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:41:16,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:41:16,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 33 [2024-10-14 19:41:16,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:41:17,173 INFO L124 PetriNetUnfolderBase]: 497/1087 cut-off events. [2024-10-14 19:41:17,174 INFO L125 PetriNetUnfolderBase]: For 450/450 co-relation queries the response was YES. [2024-10-14 19:41:17,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2614 conditions, 1087 events. 497/1087 cut-off events. For 450/450 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 4707 event pairs, 70 based on Foata normal form. 105/1177 useless extension candidates. Maximal degree in co-relation 2591. Up to 194 conditions per place. [2024-10-14 19:41:17,181 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 145 selfloop transitions, 12 changer transitions 0/161 dead transitions. [2024-10-14 19:41:17,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 161 transitions, 878 flow [2024-10-14 19:41:17,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-14 19:41:17,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-14 19:41:17,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 257 transitions. [2024-10-14 19:41:17,183 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.648989898989899 [2024-10-14 19:41:17,183 INFO L175 Difference]: Start difference. First operand has 59 places, 41 transitions, 170 flow. Second operand 12 states and 257 transitions. [2024-10-14 19:41:17,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 161 transitions, 878 flow [2024-10-14 19:41:17,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 161 transitions, 877 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-14 19:41:17,188 INFO L231 Difference]: Finished difference. Result has 75 places, 47 transitions, 248 flow [2024-10-14 19:41:17,188 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=248, PETRI_PLACES=75, PETRI_TRANSITIONS=47} [2024-10-14 19:41:17,189 INFO L277 CegarLoopForPetriNet]: 33 programPoint places, 42 predicate places. [2024-10-14 19:41:17,189 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 47 transitions, 248 flow [2024-10-14 19:41:17,190 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 13.0) internal successors, (182), 14 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:41:17,190 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:41:17,190 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:41:17,207 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-14 19:41:17,390 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 19:41:17,391 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-10-14 19:41:17,391 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:41:17,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1084002208, now seen corresponding path program 1 times [2024-10-14 19:41:17,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 19:41:17,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642849185] [2024-10-14 19:41:17,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:41:17,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 19:41:17,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:41:17,580 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-14 19:41:17,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 19:41:17,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642849185] [2024-10-14 19:41:17,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642849185] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 19:41:17,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285526912] [2024-10-14 19:41:17,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:41:17,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 19:41:17,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 19:41:17,583 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 19:41:17,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-14 19:41:17,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:41:17,673 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-14 19:41:17,675 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:41:17,869 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-14 19:41:17,870 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:41:18,014 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-14 19:41:18,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285526912] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:41:18,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 19:41:18,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2024-10-14 19:41:18,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70624023] [2024-10-14 19:41:18,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 19:41:18,015 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-14 19:41:18,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 19:41:18,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-14 19:41:18,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2024-10-14 19:41:18,098 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 33 [2024-10-14 19:41:18,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 47 transitions, 248 flow. Second operand has 14 states, 14 states have (on average 13.0) internal successors, (182), 14 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:41:18,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:41:18,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 33 [2024-10-14 19:41:18,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:41:18,768 INFO L124 PetriNetUnfolderBase]: 1090/2362 cut-off events. [2024-10-14 19:41:18,768 INFO L125 PetriNetUnfolderBase]: For 2808/2808 co-relation queries the response was YES. [2024-10-14 19:41:18,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6453 conditions, 2362 events. 1090/2362 cut-off events. For 2808/2808 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 12353 event pairs, 186 based on Foata normal form. 320/2682 useless extension candidates. Maximal degree in co-relation 6422. Up to 462 conditions per place. [2024-10-14 19:41:18,791 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 206 selfloop transitions, 12 changer transitions 0/221 dead transitions. [2024-10-14 19:41:18,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 221 transitions, 1708 flow [2024-10-14 19:41:18,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-14 19:41:18,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-14 19:41:18,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 248 transitions. [2024-10-14 19:41:18,793 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6262626262626263 [2024-10-14 19:41:18,793 INFO L175 Difference]: Start difference. First operand has 75 places, 47 transitions, 248 flow. Second operand 12 states and 248 transitions. [2024-10-14 19:41:18,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 221 transitions, 1708 flow [2024-10-14 19:41:18,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 221 transitions, 1527 flow, removed 70 selfloop flow, removed 3 redundant places. [2024-10-14 19:41:18,801 INFO L231 Difference]: Finished difference. Result has 89 places, 53 transitions, 308 flow [2024-10-14 19:41:18,801 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=308, PETRI_PLACES=89, PETRI_TRANSITIONS=53} [2024-10-14 19:41:18,802 INFO L277 CegarLoopForPetriNet]: 33 programPoint places, 56 predicate places. [2024-10-14 19:41:18,802 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 53 transitions, 308 flow [2024-10-14 19:41:18,802 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 13.0) internal successors, (182), 14 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:41:18,803 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:41:18,803 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2024-10-14 19:41:18,821 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-14 19:41:19,006 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,SelfDestructingSolverStorable10 [2024-10-14 19:41:19,007 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-10-14 19:41:19,007 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:41:19,007 INFO L85 PathProgramCache]: Analyzing trace with hash -728797980, now seen corresponding path program 2 times [2024-10-14 19:41:19,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 19:41:19,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411885878] [2024-10-14 19:41:19,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:41:19,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 19:41:19,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:41:19,392 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-14 19:41:19,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 19:41:19,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411885878] [2024-10-14 19:41:19,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411885878] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 19:41:19,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352506048] [2024-10-14 19:41:19,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 19:41:19,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 19:41:19,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 19:41:19,395 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 19:41:19,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-14 19:41:19,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 19:41:19,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 19:41:19,515 INFO L255 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-10-14 19:41:19,517 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:41:19,895 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-14 19:41:19,896 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:41:20,250 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-14 19:41:20,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352506048] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:41:20,250 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 19:41:20,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2024-10-14 19:41:20,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040263137] [2024-10-14 19:41:20,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 19:41:20,251 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-14 19:41:20,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 19:41:20,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-14 19:41:20,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2024-10-14 19:41:20,559 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 33 [2024-10-14 19:41:20,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 53 transitions, 308 flow. Second operand has 23 states, 23 states have (on average 14.173913043478262) internal successors, (326), 23 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:41:20,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:41:20,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 33 [2024-10-14 19:41:20,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:41:22,556 INFO L124 PetriNetUnfolderBase]: 2279/4943 cut-off events. [2024-10-14 19:41:22,556 INFO L125 PetriNetUnfolderBase]: For 10088/10088 co-relation queries the response was YES. [2024-10-14 19:41:22,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14554 conditions, 4943 events. 2279/4943 cut-off events. For 10088/10088 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 27423 event pairs, 160 based on Foata normal form. 396/5339 useless extension candidates. Maximal degree in co-relation 14515. Up to 496 conditions per place. [2024-10-14 19:41:22,608 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 455 selfloop transitions, 24 changer transitions 0/482 dead transitions. [2024-10-14 19:41:22,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 482 transitions, 3786 flow [2024-10-14 19:41:22,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-14 19:41:22,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-10-14 19:41:22,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 523 transitions. [2024-10-14 19:41:22,611 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6603535353535354 [2024-10-14 19:41:22,611 INFO L175 Difference]: Start difference. First operand has 89 places, 53 transitions, 308 flow. Second operand 24 states and 523 transitions. [2024-10-14 19:41:22,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 482 transitions, 3786 flow [2024-10-14 19:41:22,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 482 transitions, 3301 flow, removed 176 selfloop flow, removed 4 redundant places. [2024-10-14 19:41:22,724 INFO L231 Difference]: Finished difference. Result has 121 places, 66 transitions, 461 flow [2024-10-14 19:41:22,725 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=461, PETRI_PLACES=121, PETRI_TRANSITIONS=66} [2024-10-14 19:41:22,727 INFO L277 CegarLoopForPetriNet]: 33 programPoint places, 88 predicate places. [2024-10-14 19:41:22,728 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 66 transitions, 461 flow [2024-10-14 19:41:22,728 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 14.173913043478262) internal successors, (326), 23 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:41:22,728 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:41:22,728 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2024-10-14 19:41:22,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-14 19:41:22,932 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 19:41:22,933 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-10-14 19:41:22,933 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:41:22,933 INFO L85 PathProgramCache]: Analyzing trace with hash 65571799, now seen corresponding path program 2 times [2024-10-14 19:41:22,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 19:41:22,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712080517] [2024-10-14 19:41:22,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:41:22,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 19:41:22,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:41:23,265 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-14 19:41:23,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 19:41:23,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712080517] [2024-10-14 19:41:23,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712080517] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 19:41:23,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088467942] [2024-10-14 19:41:23,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 19:41:23,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 19:41:23,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 19:41:23,269 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 19:41:23,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-14 19:41:23,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 19:41:23,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 19:41:23,379 INFO L255 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-10-14 19:41:23,382 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:41:23,834 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 46 proven. 12 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-14 19:41:23,835 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:41:24,470 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 42 proven. 16 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-14 19:41:24,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088467942] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:41:24,471 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 19:41:24,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2024-10-14 19:41:24,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593078820] [2024-10-14 19:41:24,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 19:41:24,473 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-14 19:41:24,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 19:41:24,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-14 19:41:24,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2024-10-14 19:41:24,695 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 33 [2024-10-14 19:41:24,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 66 transitions, 461 flow. Second operand has 23 states, 23 states have (on average 14.173913043478262) internal successors, (326), 23 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:41:24,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:41:24,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 33 [2024-10-14 19:41:24,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:41:26,363 INFO L124 PetriNetUnfolderBase]: 2654/5750 cut-off events. [2024-10-14 19:41:26,364 INFO L125 PetriNetUnfolderBase]: For 13784/13784 co-relation queries the response was YES. [2024-10-14 19:41:26,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17803 conditions, 5750 events. 2654/5750 cut-off events. For 13784/13784 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 33895 event pairs, 6 based on Foata normal form. 204/5954 useless extension candidates. Maximal degree in co-relation 17751. Up to 680 conditions per place. [2024-10-14 19:41:26,416 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 415 selfloop transitions, 15 changer transitions 13/446 dead transitions. [2024-10-14 19:41:26,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 446 transitions, 4405 flow [2024-10-14 19:41:26,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-14 19:41:26,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-10-14 19:41:26,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 300 transitions. [2024-10-14 19:41:26,419 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6060606060606061 [2024-10-14 19:41:26,419 INFO L175 Difference]: Start difference. First operand has 121 places, 66 transitions, 461 flow. Second operand 15 states and 300 transitions. [2024-10-14 19:41:26,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 446 transitions, 4405 flow [2024-10-14 19:41:26,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 446 transitions, 3850 flow, removed 169 selfloop flow, removed 13 redundant places. [2024-10-14 19:41:26,447 INFO L231 Difference]: Finished difference. Result has 122 places, 66 transitions, 421 flow [2024-10-14 19:41:26,447 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=400, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=421, PETRI_PLACES=122, PETRI_TRANSITIONS=66} [2024-10-14 19:41:26,448 INFO L277 CegarLoopForPetriNet]: 33 programPoint places, 89 predicate places. [2024-10-14 19:41:26,448 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 66 transitions, 421 flow [2024-10-14 19:41:26,448 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 14.173913043478262) internal successors, (326), 23 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:41:26,448 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:41:26,448 INFO L204 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1] [2024-10-14 19:41:26,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-10-14 19:41:26,649 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 19:41:26,649 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-10-14 19:41:26,649 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:41:26,649 INFO L85 PathProgramCache]: Analyzing trace with hash 509896580, now seen corresponding path program 3 times [2024-10-14 19:41:26,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 19:41:26,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682297631] [2024-10-14 19:41:26,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:41:26,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 19:41:26,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:41:26,961 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 291 proven. 64 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-14 19:41:26,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 19:41:26,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682297631] [2024-10-14 19:41:26,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682297631] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 19:41:26,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61311264] [2024-10-14 19:41:26,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 19:41:26,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 19:41:26,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 19:41:26,964 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 19:41:26,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-14 19:41:27,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-14 19:41:27,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 19:41:27,149 INFO L255 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-14 19:41:27,152 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:41:27,663 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 64 proven. 30 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2024-10-14 19:41:27,663 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:41:28,144 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2024-10-14 19:41:28,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61311264] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:41:28,144 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 19:41:28,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 23 [2024-10-14 19:41:28,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653963047] [2024-10-14 19:41:28,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 19:41:28,145 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-14 19:41:28,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 19:41:28,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-14 19:41:28,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2024-10-14 19:41:28,300 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 33 [2024-10-14 19:41:28,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 66 transitions, 421 flow. Second operand has 23 states, 23 states have (on average 14.695652173913043) internal successors, (338), 23 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:41:28,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:41:28,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 33 [2024-10-14 19:41:28,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:41:30,324 INFO L124 PetriNetUnfolderBase]: 2381/5207 cut-off events. [2024-10-14 19:41:30,324 INFO L125 PetriNetUnfolderBase]: For 8059/8059 co-relation queries the response was YES. [2024-10-14 19:41:30,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15750 conditions, 5207 events. 2381/5207 cut-off events. For 8059/8059 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 29720 event pairs, 0 based on Foata normal form. 39/5246 useless extension candidates. Maximal degree in co-relation 15700. Up to 435 conditions per place. [2024-10-14 19:41:30,360 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 0 selfloop transitions, 0 changer transitions 537/537 dead transitions. [2024-10-14 19:41:30,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 537 transitions, 4254 flow [2024-10-14 19:41:30,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-10-14 19:41:30,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-10-14 19:41:30,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 523 transitions. [2024-10-14 19:41:30,363 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6339393939393939 [2024-10-14 19:41:30,363 INFO L175 Difference]: Start difference. First operand has 122 places, 66 transitions, 421 flow. Second operand 25 states and 523 transitions. [2024-10-14 19:41:30,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 537 transitions, 4254 flow [2024-10-14 19:41:30,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 537 transitions, 3667 flow, removed 52 selfloop flow, removed 33 redundant places. [2024-10-14 19:41:30,399 INFO L231 Difference]: Finished difference. Result has 110 places, 0 transitions, 0 flow [2024-10-14 19:41:30,399 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=0, PETRI_PLACES=110, PETRI_TRANSITIONS=0} [2024-10-14 19:41:30,400 INFO L277 CegarLoopForPetriNet]: 33 programPoint places, 77 predicate places. [2024-10-14 19:41:30,400 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 0 transitions, 0 flow [2024-10-14 19:41:30,401 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 14.695652173913043) internal successors, (338), 23 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:41:30,404 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (13 of 14 remaining) [2024-10-14 19:41:30,404 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 14 remaining) [2024-10-14 19:41:30,404 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 14 remaining) [2024-10-14 19:41:30,404 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 14 remaining) [2024-10-14 19:41:30,405 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 14 remaining) [2024-10-14 19:41:30,405 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 14 remaining) [2024-10-14 19:41:30,405 INFO L782 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 14 remaining) [2024-10-14 19:41:30,405 INFO L782 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 14 remaining) [2024-10-14 19:41:30,405 INFO L782 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 14 remaining) [2024-10-14 19:41:30,405 INFO L782 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 14 remaining) [2024-10-14 19:41:30,405 INFO L782 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 14 remaining) [2024-10-14 19:41:30,405 INFO L782 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 14 remaining) [2024-10-14 19:41:30,406 INFO L782 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 14 remaining) [2024-10-14 19:41:30,406 INFO L782 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 14 remaining) [2024-10-14 19:41:30,427 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-14 19:41:30,610 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-14 19:41:30,611 INFO L407 BasicCegarLoop]: Path program histogram: [3, 2, 2, 2, 1, 1, 1, 1, 1] [2024-10-14 19:41:30,615 INFO L234 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-10-14 19:41:30,616 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-10-14 19:41:30,620 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.10 07:41:30 BasicIcfg [2024-10-14 19:41:30,620 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-10-14 19:41:30,620 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-10-14 19:41:30,620 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-10-14 19:41:30,621 INFO L274 PluginConnector]: Witness Printer initialized [2024-10-14 19:41:30,621 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 07:41:11" (3/4) ... [2024-10-14 19:41:30,623 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-10-14 19:41:30,626 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure t_fun [2024-10-14 19:41:30,630 INFO L904 BoogieBacktranslator]: Reduced CFG by removing 31 nodes and edges [2024-10-14 19:41:30,631 INFO L904 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2024-10-14 19:41:30,631 INFO L904 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2024-10-14 19:41:30,631 INFO L904 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2024-10-14 19:41:30,710 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2024-10-14 19:41:30,711 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.yml [2024-10-14 19:41:30,711 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-10-14 19:41:30,712 INFO L158 Benchmark]: Toolchain (without parser) took 20249.57ms. Allocated memory was 159.4MB in the beginning and 656.4MB in the end (delta: 497.0MB). Free memory was 103.4MB in the beginning and 390.6MB in the end (delta: -287.2MB). Peak memory consumption was 212.9MB. Max. memory is 16.1GB. [2024-10-14 19:41:30,712 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 159.4MB. Free memory is still 119.3MB. There was no memory consumed. Max. memory is 16.1GB. [2024-10-14 19:41:30,712 INFO L158 Benchmark]: CACSL2BoogieTranslator took 658.36ms. Allocated memory is still 159.4MB. Free memory was 103.0MB in the beginning and 73.6MB in the end (delta: 29.4MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. [2024-10-14 19:41:30,712 INFO L158 Benchmark]: Boogie Procedure Inliner took 48.18ms. Allocated memory is still 159.4MB. Free memory was 73.6MB in the beginning and 71.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-10-14 19:41:30,712 INFO L158 Benchmark]: Boogie Preprocessor took 107.72ms. Allocated memory is still 159.4MB. Free memory was 71.5MB in the beginning and 129.3MB in the end (delta: -57.8MB). Peak memory consumption was 6.4MB. Max. memory is 16.1GB. [2024-10-14 19:41:30,713 INFO L158 Benchmark]: RCFGBuilder took 491.73ms. Allocated memory is still 159.4MB. Free memory was 129.3MB in the beginning and 106.6MB in the end (delta: 22.7MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2024-10-14 19:41:30,713 INFO L158 Benchmark]: TraceAbstraction took 18846.12ms. Allocated memory was 159.4MB in the beginning and 656.4MB in the end (delta: 497.0MB). Free memory was 105.8MB in the beginning and 394.1MB in the end (delta: -288.2MB). Peak memory consumption was 454.0MB. Max. memory is 16.1GB. [2024-10-14 19:41:30,713 INFO L158 Benchmark]: Witness Printer took 90.71ms. Allocated memory is still 656.4MB. Free memory was 394.1MB in the beginning and 390.6MB in the end (delta: 3.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-10-14 19:41:30,714 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 159.4MB. Free memory is still 119.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 658.36ms. Allocated memory is still 159.4MB. Free memory was 103.0MB in the beginning and 73.6MB in the end (delta: 29.4MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 48.18ms. Allocated memory is still 159.4MB. Free memory was 73.6MB in the beginning and 71.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 107.72ms. Allocated memory is still 159.4MB. Free memory was 71.5MB in the beginning and 129.3MB in the end (delta: -57.8MB). Peak memory consumption was 6.4MB. Max. memory is 16.1GB. * RCFGBuilder took 491.73ms. Allocated memory is still 159.4MB. Free memory was 129.3MB in the beginning and 106.6MB in the end (delta: 22.7MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * TraceAbstraction took 18846.12ms. Allocated memory was 159.4MB in the beginning and 656.4MB in the end (delta: 497.0MB). Free memory was 105.8MB in the beginning and 394.1MB in the end (delta: -288.2MB). Peak memory consumption was 454.0MB. Max. memory is 16.1GB. * Witness Printer took 90.71ms. Allocated memory is still 656.4MB. Free memory was 394.1MB in the beginning and 390.6MB in the end (delta: 3.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 932]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 45 locations, 14 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 18.7s, OverallIterations: 14, TraceHistogramMax: 11, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 9.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2374 SdHoareTripleChecker+Valid, 4.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2282 mSDsluCounter, 602 SdHoareTripleChecker+Invalid, 3.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 590 mSDsCounter, 44 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6460 IncrementalHoareTripleChecker+Invalid, 6504 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 44 mSolverCounterUnsat, 12 mSDtfsCounter, 6460 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 620 GetRequests, 438 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 958 ImplicationChecksByTransitivity, 2.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=461occurred in iteration=12, InterpolantAutomatonStates: 133, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 6.0s InterpolantComputationTime, 611 NumberOfCodeBlocks, 549 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 833 ConstructedInterpolants, 0 QuantifiedInterpolants, 9513 SizeOfPredicates, 28 NumberOfNonLiveVariables, 1291 ConjunctsInSsa, 109 ConjunctsInUnsatCore, 29 InterpolantComputations, 7 PerfectInterpolantSequences, 2022/2528 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 9 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-10-14 19:41:30,742 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE