./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c7c6ca5d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0f0e249de6560bdff430500b6d1ad159bf4a19253ccf183d061fafc41fe4114b --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-09 10:53:14,824 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 10:53:14,886 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-09 10:53:14,890 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 10:53:14,893 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 10:53:14,922 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 10:53:14,924 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 10:53:14,924 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 10:53:14,925 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-09 10:53:14,926 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-09 10:53:14,926 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 10:53:14,926 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 10:53:14,927 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 10:53:14,928 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 10:53:14,928 INFO L153 SettingsManager]: * Use SBE=true [2024-11-09 10:53:14,929 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 10:53:14,929 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 10:53:14,929 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 10:53:14,929 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 10:53:14,929 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 10:53:14,930 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-09 10:53:14,930 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-09 10:53:14,930 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-09 10:53:14,930 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 10:53:14,932 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-09 10:53:14,932 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 10:53:14,932 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-09 10:53:14,932 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 10:53:14,933 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 10:53:14,933 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 10:53:14,933 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-09 10:53:14,933 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 10:53:14,933 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 10:53:14,933 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 10:53:14,934 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 10:53:14,934 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 10:53:14,934 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-09 10:53:14,934 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 10:53:14,934 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 10:53:14,934 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-09 10:53:14,934 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-09 10:53:14,935 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 10:53:14,935 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0f0e249de6560bdff430500b6d1ad159bf4a19253ccf183d061fafc41fe4114b [2024-11-09 10:53:15,138 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 10:53:15,161 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 10:53:15,163 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 10:53:15,164 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 10:53:15,165 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 10:53:15,166 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c [2024-11-09 10:53:16,418 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 10:53:16,590 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 10:53:16,592 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c [2024-11-09 10:53:16,602 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8acedd005/f8cfafafddb444f6be7e061282353ef9/FLAG1c0a91ff4 [2024-11-09 10:53:16,990 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8acedd005/f8cfafafddb444f6be7e061282353ef9 [2024-11-09 10:53:16,992 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 10:53:16,993 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 10:53:16,995 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 10:53:16,996 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 10:53:17,000 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 10:53:17,000 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:53:16" (1/1) ... [2024-11-09 10:53:17,001 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36d7200e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:53:17, skipping insertion in model container [2024-11-09 10:53:17,001 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:53:16" (1/1) ... [2024-11-09 10:53:17,018 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 10:53:17,188 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-09 10:53:17,195 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 10:53:17,204 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 10:53:17,234 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 10:53:17,252 INFO L204 MainTranslator]: Completed translation [2024-11-09 10:53:17,252 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:53:17 WrapperNode [2024-11-09 10:53:17,252 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 10:53:17,254 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 10:53:17,255 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 10:53:17,255 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 10:53:17,262 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:53:17" (1/1) ... [2024-11-09 10:53:17,270 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:53:17" (1/1) ... [2024-11-09 10:53:17,296 INFO L138 Inliner]: procedures = 23, calls = 36, calls flagged for inlining = 12, calls inlined = 14, statements flattened = 189 [2024-11-09 10:53:17,296 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 10:53:17,297 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 10:53:17,297 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 10:53:17,297 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 10:53:17,308 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:53:17" (1/1) ... [2024-11-09 10:53:17,308 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:53:17" (1/1) ... [2024-11-09 10:53:17,316 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:53:17" (1/1) ... [2024-11-09 10:53:17,337 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-09 10:53:17,338 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:53:17" (1/1) ... [2024-11-09 10:53:17,338 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:53:17" (1/1) ... [2024-11-09 10:53:17,346 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:53:17" (1/1) ... [2024-11-09 10:53:17,354 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:53:17" (1/1) ... [2024-11-09 10:53:17,357 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:53:17" (1/1) ... [2024-11-09 10:53:17,358 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:53:17" (1/1) ... [2024-11-09 10:53:17,360 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 10:53:17,361 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 10:53:17,361 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 10:53:17,361 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 10:53:17,362 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:53:17" (1/1) ... [2024-11-09 10:53:17,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 10:53:17,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:53:17,394 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-09 10:53:17,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-09 10:53:17,453 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 10:53:17,454 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-09 10:53:17,454 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-09 10:53:17,456 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-09 10:53:17,456 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-09 10:53:17,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-09 10:53:17,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-09 10:53:17,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-09 10:53:17,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-09 10:53:17,458 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-09 10:53:17,458 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-09 10:53:17,458 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-09 10:53:17,458 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 10:53:17,459 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 10:53:17,459 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-09 10:53:17,459 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-09 10:53:17,460 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-09 10:53:17,563 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 10:53:17,565 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 10:53:17,866 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-09 10:53:17,866 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 10:53:18,087 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 10:53:18,088 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-09 10:53:18,089 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:53:18 BoogieIcfgContainer [2024-11-09 10:53:18,089 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 10:53:18,090 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 10:53:18,091 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 10:53:18,093 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 10:53:18,094 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 10:53:16" (1/3) ... [2024-11-09 10:53:18,094 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59d8e4ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:53:18, skipping insertion in model container [2024-11-09 10:53:18,094 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:53:17" (2/3) ... [2024-11-09 10:53:18,095 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59d8e4ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:53:18, skipping insertion in model container [2024-11-09 10:53:18,095 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:53:18" (3/3) ... [2024-11-09 10:53:18,096 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-dec-subseq.wvr.c [2024-11-09 10:53:18,109 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 10:53:18,110 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2024-11-09 10:53:18,110 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-09 10:53:18,174 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-09 10:53:18,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 53 transitions, 120 flow [2024-11-09 10:53:18,223 INFO L124 PetriNetUnfolderBase]: 5/51 cut-off events. [2024-11-09 10:53:18,224 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-09 10:53:18,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 51 events. 5/51 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 137 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 35. Up to 2 conditions per place. [2024-11-09 10:53:18,230 INFO L82 GeneralOperation]: Start removeDead. Operand has 55 places, 53 transitions, 120 flow [2024-11-09 10:53:18,234 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 50 transitions, 112 flow [2024-11-09 10:53:18,244 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 10:53:18,250 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;@9fa9ace, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 10:53:18,250 INFO L334 AbstractCegarLoop]: Starting to check reachability of 30 error locations. [2024-11-09 10:53:18,253 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-09 10:53:18,253 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-09 10:53:18,253 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-09 10:53:18,253 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:53:18,255 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-09 10:53:18,256 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-09 10:53:18,261 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:53:18,262 INFO L85 PathProgramCache]: Analyzing trace with hash 576019, now seen corresponding path program 1 times [2024-11-09 10:53:18,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:53:18,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690867819] [2024-11-09 10:53:18,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:53:18,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:53:18,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:53:18,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:53:18,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:53:18,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690867819] [2024-11-09 10:53:18,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690867819] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:53:18,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:53:18,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-09 10:53:18,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063627634] [2024-11-09 10:53:18,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:53:18,546 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:53:18,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:53:18,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:53:18,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:53:18,586 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 53 [2024-11-09 10:53:18,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 50 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:18,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:53:18,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 53 [2024-11-09 10:53:18,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:53:18,750 INFO L124 PetriNetUnfolderBase]: 299/576 cut-off events. [2024-11-09 10:53:18,751 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-11-09 10:53:18,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1057 conditions, 576 events. 299/576 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 3105 event pairs, 171 based on Foata normal form. 1/348 useless extension candidates. Maximal degree in co-relation 985. Up to 443 conditions per place. [2024-11-09 10:53:18,757 INFO L140 encePairwiseOnDemand]: 48/53 looper letters, 28 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2024-11-09 10:53:18,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 46 transitions, 164 flow [2024-11-09 10:53:18,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:53:18,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:53:18,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 90 transitions. [2024-11-09 10:53:18,769 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5660377358490566 [2024-11-09 10:53:18,771 INFO L175 Difference]: Start difference. First operand has 52 places, 50 transitions, 112 flow. Second operand 3 states and 90 transitions. [2024-11-09 10:53:18,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 46 transitions, 164 flow [2024-11-09 10:53:18,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 46 transitions, 156 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-09 10:53:18,778 INFO L231 Difference]: Finished difference. Result has 46 places, 46 transitions, 100 flow [2024-11-09 10:53:18,780 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=46, PETRI_TRANSITIONS=46} [2024-11-09 10:53:18,784 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -6 predicate places. [2024-11-09 10:53:18,784 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 46 transitions, 100 flow [2024-11-09 10:53:18,784 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:18,785 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:53:18,785 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-09 10:53:18,785 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 10:53:18,785 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-09 10:53:18,786 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:53:18,787 INFO L85 PathProgramCache]: Analyzing trace with hash 576020, now seen corresponding path program 1 times [2024-11-09 10:53:18,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:53:18,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318703452] [2024-11-09 10:53:18,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:53:18,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:53:18,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:53:19,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:53:19,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:53:19,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318703452] [2024-11-09 10:53:19,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318703452] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:53:19,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:53:19,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:53:19,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110495352] [2024-11-09 10:53:19,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:53:19,070 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:53:19,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:53:19,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:53:19,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:53:19,102 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 53 [2024-11-09 10:53:19,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 46 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:19,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:53:19,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 53 [2024-11-09 10:53:19,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:53:19,300 INFO L124 PetriNetUnfolderBase]: 300/579 cut-off events. [2024-11-09 10:53:19,300 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-09 10:53:19,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1048 conditions, 579 events. 300/579 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 3110 event pairs, 171 based on Foata normal form. 0/348 useless extension candidates. Maximal degree in co-relation 1019. Up to 452 conditions per place. [2024-11-09 10:53:19,306 INFO L140 encePairwiseOnDemand]: 48/53 looper letters, 31 selfloop transitions, 4 changer transitions 0/49 dead transitions. [2024-11-09 10:53:19,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 49 transitions, 176 flow [2024-11-09 10:53:19,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:53:19,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:53:19,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 112 transitions. [2024-11-09 10:53:19,309 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5283018867924528 [2024-11-09 10:53:19,309 INFO L175 Difference]: Start difference. First operand has 46 places, 46 transitions, 100 flow. Second operand 4 states and 112 transitions. [2024-11-09 10:53:19,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 49 transitions, 176 flow [2024-11-09 10:53:19,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 49 transitions, 172 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:53:19,311 INFO L231 Difference]: Finished difference. Result has 49 places, 49 transitions, 123 flow [2024-11-09 10:53:19,316 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=123, PETRI_PLACES=49, PETRI_TRANSITIONS=49} [2024-11-09 10:53:19,317 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -3 predicate places. [2024-11-09 10:53:19,317 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 49 transitions, 123 flow [2024-11-09 10:53:19,318 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:19,318 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:53:19,318 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-09 10:53:19,318 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 10:53:19,319 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-09 10:53:19,319 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:53:19,319 INFO L85 PathProgramCache]: Analyzing trace with hash 17857530, now seen corresponding path program 1 times [2024-11-09 10:53:19,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:53:19,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221196871] [2024-11-09 10:53:19,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:53:19,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:53:19,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:53:19,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:53:19,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:53:19,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221196871] [2024-11-09 10:53:19,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221196871] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:53:19,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:53:19,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:53:19,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596153446] [2024-11-09 10:53:19,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:53:19,400 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:53:19,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:53:19,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:53:19,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:53:19,431 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-11-09 10:53:19,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 49 transitions, 123 flow. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:19,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:53:19,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-11-09 10:53:19,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:53:19,520 INFO L124 PetriNetUnfolderBase]: 290/531 cut-off events. [2024-11-09 10:53:19,524 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-09 10:53:19,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1000 conditions, 531 events. 290/531 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 2620 event pairs, 171 based on Foata normal form. 0/376 useless extension candidates. Maximal degree in co-relation 976. Up to 433 conditions per place. [2024-11-09 10:53:19,527 INFO L140 encePairwiseOnDemand]: 47/53 looper letters, 31 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2024-11-09 10:53:19,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 45 transitions, 181 flow [2024-11-09 10:53:19,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:53:19,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:53:19,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 94 transitions. [2024-11-09 10:53:19,531 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44339622641509435 [2024-11-09 10:53:19,531 INFO L175 Difference]: Start difference. First operand has 49 places, 49 transitions, 123 flow. Second operand 4 states and 94 transitions. [2024-11-09 10:53:19,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 45 transitions, 181 flow [2024-11-09 10:53:19,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 45 transitions, 178 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 10:53:19,533 INFO L231 Difference]: Finished difference. Result has 47 places, 45 transitions, 116 flow [2024-11-09 10:53:19,533 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=116, PETRI_PLACES=47, PETRI_TRANSITIONS=45} [2024-11-09 10:53:19,534 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -5 predicate places. [2024-11-09 10:53:19,536 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 45 transitions, 116 flow [2024-11-09 10:53:19,536 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:19,536 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:53:19,536 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-09 10:53:19,536 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 10:53:19,536 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-09 10:53:19,537 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:53:19,537 INFO L85 PathProgramCache]: Analyzing trace with hash 17857531, now seen corresponding path program 1 times [2024-11-09 10:53:19,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:53:19,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545375688] [2024-11-09 10:53:19,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:53:19,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:53:19,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:53:19,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:53:19,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:53:19,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545375688] [2024-11-09 10:53:19,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545375688] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:53:19,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:53:19,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:53:19,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073316314] [2024-11-09 10:53:19,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:53:19,598 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:53:19,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:53:19,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:53:19,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:53:19,609 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 53 [2024-11-09 10:53:19,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 45 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:19,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:53:19,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 53 [2024-11-09 10:53:19,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:53:19,679 INFO L124 PetriNetUnfolderBase]: 274/513 cut-off events. [2024-11-09 10:53:19,680 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-09 10:53:19,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 952 conditions, 513 events. 274/513 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 2539 event pairs, 153 based on Foata normal form. 1/336 useless extension candidates. Maximal degree in co-relation 929. Up to 411 conditions per place. [2024-11-09 10:53:19,700 INFO L140 encePairwiseOnDemand]: 50/53 looper letters, 31 selfloop transitions, 3 changer transitions 0/47 dead transitions. [2024-11-09 10:53:19,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 47 transitions, 188 flow [2024-11-09 10:53:19,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:53:19,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:53:19,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2024-11-09 10:53:19,702 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5974842767295597 [2024-11-09 10:53:19,703 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 116 flow. Second operand 3 states and 95 transitions. [2024-11-09 10:53:19,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 47 transitions, 188 flow [2024-11-09 10:53:19,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 47 transitions, 185 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:53:19,705 INFO L231 Difference]: Finished difference. Result has 48 places, 46 transitions, 128 flow [2024-11-09 10:53:19,706 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=48, PETRI_TRANSITIONS=46} [2024-11-09 10:53:19,706 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -4 predicate places. [2024-11-09 10:53:19,708 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 46 transitions, 128 flow [2024-11-09 10:53:19,708 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:19,708 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:53:19,708 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-09 10:53:19,708 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-09 10:53:19,709 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-09 10:53:19,709 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:53:19,709 INFO L85 PathProgramCache]: Analyzing trace with hash 17857523, now seen corresponding path program 1 times [2024-11-09 10:53:19,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:53:19,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843311043] [2024-11-09 10:53:19,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:53:19,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:53:19,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:53:19,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:53:19,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:53:19,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843311043] [2024-11-09 10:53:19,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843311043] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:53:19,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:53:19,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:53:19,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165458431] [2024-11-09 10:53:19,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:53:19,886 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:53:19,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:53:19,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:53:19,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:53:19,944 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 53 [2024-11-09 10:53:19,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 46 transitions, 128 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:19,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:53:19,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 53 [2024-11-09 10:53:19,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:53:20,065 INFO L124 PetriNetUnfolderBase]: 274/512 cut-off events. [2024-11-09 10:53:20,065 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-11-09 10:53:20,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 959 conditions, 512 events. 274/512 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 2545 event pairs, 153 based on Foata normal form. 1/335 useless extension candidates. Maximal degree in co-relation 933. Up to 410 conditions per place. [2024-11-09 10:53:20,068 INFO L140 encePairwiseOnDemand]: 46/53 looper letters, 30 selfloop transitions, 6 changer transitions 0/47 dead transitions. [2024-11-09 10:53:20,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 47 transitions, 202 flow [2024-11-09 10:53:20,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:53:20,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:53:20,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2024-11-09 10:53:20,070 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4981132075471698 [2024-11-09 10:53:20,070 INFO L175 Difference]: Start difference. First operand has 48 places, 46 transitions, 128 flow. Second operand 5 states and 132 transitions. [2024-11-09 10:53:20,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 47 transitions, 202 flow [2024-11-09 10:53:20,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 47 transitions, 199 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 10:53:20,071 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 151 flow [2024-11-09 10:53:20,071 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=151, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2024-11-09 10:53:20,072 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 1 predicate places. [2024-11-09 10:53:20,072 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 151 flow [2024-11-09 10:53:20,072 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:20,073 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:53:20,073 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-09 10:53:20,073 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-09 10:53:20,073 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-09 10:53:20,073 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:53:20,073 INFO L85 PathProgramCache]: Analyzing trace with hash 553573860, now seen corresponding path program 1 times [2024-11-09 10:53:20,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:53:20,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910803403] [2024-11-09 10:53:20,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:53:20,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:53:20,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:53:20,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:53:20,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:53:20,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910803403] [2024-11-09 10:53:20,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910803403] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:53:20,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126054869] [2024-11-09 10:53:20,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:53:20,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:53:20,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:53:20,238 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:53:20,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 10:53:20,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:53:20,294 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-09 10:53:20,300 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:53:20,365 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-09 10:53:20,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:53:20,533 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:53:20,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:53:20,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126054869] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:53:20,629 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:53:20,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-09 10:53:20,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627705190] [2024-11-09 10:53:20,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:53:20,630 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 10:53:20,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:53:20,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 10:53:20,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-09 10:53:20,754 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 53 [2024-11-09 10:53:20,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 151 flow. Second operand has 11 states, 11 states have (on average 20.363636363636363) internal successors, (224), 11 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:20,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:53:20,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 53 [2024-11-09 10:53:20,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:53:20,904 INFO L124 PetriNetUnfolderBase]: 274/511 cut-off events. [2024-11-09 10:53:20,905 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-09 10:53:20,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 969 conditions, 511 events. 274/511 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 2541 event pairs, 153 based on Foata normal form. 0/334 useless extension candidates. Maximal degree in co-relation 939. Up to 409 conditions per place. [2024-11-09 10:53:20,907 INFO L140 encePairwiseOnDemand]: 47/53 looper letters, 27 selfloop transitions, 8 changer transitions 0/46 dead transitions. [2024-11-09 10:53:20,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 46 transitions, 217 flow [2024-11-09 10:53:20,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 10:53:20,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-09 10:53:20,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-11-09 10:53:20,909 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4501347708894879 [2024-11-09 10:53:20,909 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 151 flow. Second operand 7 states and 167 transitions. [2024-11-09 10:53:20,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 46 transitions, 217 flow [2024-11-09 10:53:20,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 46 transitions, 216 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 10:53:20,912 INFO L231 Difference]: Finished difference. Result has 57 places, 46 transitions, 162 flow [2024-11-09 10:53:20,912 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=162, PETRI_PLACES=57, PETRI_TRANSITIONS=46} [2024-11-09 10:53:20,913 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 5 predicate places. [2024-11-09 10:53:20,913 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 46 transitions, 162 flow [2024-11-09 10:53:20,914 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 20.363636363636363) internal successors, (224), 11 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:20,914 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:53:20,914 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-09 10:53:20,927 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 10:53:21,114 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-09 10:53:21,115 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-09 10:53:21,115 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:53:21,115 INFO L85 PathProgramCache]: Analyzing trace with hash -18771101, now seen corresponding path program 1 times [2024-11-09 10:53:21,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:53:21,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29246026] [2024-11-09 10:53:21,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:53:21,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:53:21,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:53:21,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:53:21,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:53:21,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29246026] [2024-11-09 10:53:21,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29246026] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:53:21,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914675981] [2024-11-09 10:53:21,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:53:21,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:53:21,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:53:21,261 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:53:21,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 10:53:21,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:53:21,321 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-09 10:53:21,322 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:53:21,334 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-09 10:53:21,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:53:21,486 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:53:21,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:53:21,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914675981] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:53:21,599 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:53:21,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-09 10:53:21,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244841392] [2024-11-09 10:53:21,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:53:21,600 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 10:53:21,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:53:21,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 10:53:21,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-09 10:53:21,812 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 53 [2024-11-09 10:53:21,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 46 transitions, 162 flow. Second operand has 13 states, 13 states have (on average 20.307692307692307) internal successors, (264), 13 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:21,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:53:21,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 53 [2024-11-09 10:53:21,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:53:22,112 INFO L124 PetriNetUnfolderBase]: 276/516 cut-off events. [2024-11-09 10:53:22,112 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-11-09 10:53:22,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 997 conditions, 516 events. 276/516 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 2551 event pairs, 153 based on Foata normal form. 2/341 useless extension candidates. Maximal degree in co-relation 948. Up to 403 conditions per place. [2024-11-09 10:53:22,115 INFO L140 encePairwiseOnDemand]: 45/53 looper letters, 23 selfloop transitions, 17 changer transitions 0/51 dead transitions. [2024-11-09 10:53:22,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 51 transitions, 272 flow [2024-11-09 10:53:22,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 10:53:22,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-09 10:53:22,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-11-09 10:53:22,116 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44654088050314467 [2024-11-09 10:53:22,116 INFO L175 Difference]: Start difference. First operand has 57 places, 46 transitions, 162 flow. Second operand 9 states and 213 transitions. [2024-11-09 10:53:22,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 51 transitions, 272 flow [2024-11-09 10:53:22,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 51 transitions, 222 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-11-09 10:53:22,118 INFO L231 Difference]: Finished difference. Result has 54 places, 51 transitions, 176 flow [2024-11-09 10:53:22,118 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=176, PETRI_PLACES=54, PETRI_TRANSITIONS=51} [2024-11-09 10:53:22,119 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 2 predicate places. [2024-11-09 10:53:22,119 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 51 transitions, 176 flow [2024-11-09 10:53:22,119 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 20.307692307692307) internal successors, (264), 13 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:22,119 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:53:22,119 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-09 10:53:22,132 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 10:53:22,323 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,SelfDestructingSolverStorable6 [2024-11-09 10:53:22,324 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-09 10:53:22,324 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:53:22,324 INFO L85 PathProgramCache]: Analyzing trace with hash -18771093, now seen corresponding path program 1 times [2024-11-09 10:53:22,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:53:22,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015852825] [2024-11-09 10:53:22,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:53:22,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:53:22,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:53:22,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:53:22,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:53:22,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015852825] [2024-11-09 10:53:22,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015852825] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:53:22,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982994920] [2024-11-09 10:53:22,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:53:22,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:53:22,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:53:22,402 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:53:22,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 10:53:22,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:53:22,458 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-09 10:53:22,458 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:53:22,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:53:22,517 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:53:22,540 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-09 10:53:22,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:53:22,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982994920] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:53:22,552 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:53:22,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-09 10:53:22,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259638570] [2024-11-09 10:53:22,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:53:22,555 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 10:53:22,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:53:22,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 10:53:22,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-09 10:53:22,653 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 53 [2024-11-09 10:53:22,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 51 transitions, 176 flow. Second operand has 8 states, 8 states have (on average 21.375) internal successors, (171), 8 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:22,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:53:22,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 53 [2024-11-09 10:53:22,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:53:22,769 INFO L124 PetriNetUnfolderBase]: 276/515 cut-off events. [2024-11-09 10:53:22,769 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-09 10:53:22,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 985 conditions, 515 events. 276/515 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 2535 event pairs, 153 based on Foata normal form. 0/338 useless extension candidates. Maximal degree in co-relation 917. Up to 403 conditions per place. [2024-11-09 10:53:22,771 INFO L140 encePairwiseOnDemand]: 47/53 looper letters, 33 selfloop transitions, 7 changer transitions 0/50 dead transitions. [2024-11-09 10:53:22,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 50 transitions, 254 flow [2024-11-09 10:53:22,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:53:22,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:53:22,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 135 transitions. [2024-11-09 10:53:22,775 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5094339622641509 [2024-11-09 10:53:22,775 INFO L175 Difference]: Start difference. First operand has 54 places, 51 transitions, 176 flow. Second operand 5 states and 135 transitions. [2024-11-09 10:53:22,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 50 transitions, 254 flow [2024-11-09 10:53:22,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 50 transitions, 223 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-11-09 10:53:22,776 INFO L231 Difference]: Finished difference. Result has 52 places, 50 transitions, 157 flow [2024-11-09 10:53:22,777 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=157, PETRI_PLACES=52, PETRI_TRANSITIONS=50} [2024-11-09 10:53:22,777 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 0 predicate places. [2024-11-09 10:53:22,778 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 50 transitions, 157 flow [2024-11-09 10:53:22,778 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.375) internal successors, (171), 8 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:22,778 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:53:22,778 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:53:22,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-09 10:53:22,979 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:53:22,980 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-09 10:53:22,981 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:53:22,981 INFO L85 PathProgramCache]: Analyzing trace with hash -991081515, now seen corresponding path program 1 times [2024-11-09 10:53:22,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:53:22,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086631198] [2024-11-09 10:53:22,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:53:22,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:53:22,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:53:23,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:53:23,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:53:23,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086631198] [2024-11-09 10:53:23,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086631198] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:53:23,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064636445] [2024-11-09 10:53:23,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:53:23,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:53:23,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:53:23,086 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:53:23,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 10:53:23,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:53:23,141 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-09 10:53:23,142 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:53:23,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:53:23,172 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 10:53:23,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064636445] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:53:23,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 10:53:23,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2024-11-09 10:53:23,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369503178] [2024-11-09 10:53:23,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:53:23,173 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:53:23,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:53:23,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:53:23,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-11-09 10:53:23,192 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 53 [2024-11-09 10:53:23,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 50 transitions, 157 flow. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:23,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:53:23,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 53 [2024-11-09 10:53:23,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:53:23,288 INFO L124 PetriNetUnfolderBase]: 537/888 cut-off events. [2024-11-09 10:53:23,289 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-09 10:53:23,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1770 conditions, 888 events. 537/888 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 4659 event pairs, 136 based on Foata normal form. 0/589 useless extension candidates. Maximal degree in co-relation 1702. Up to 486 conditions per place. [2024-11-09 10:53:23,312 INFO L140 encePairwiseOnDemand]: 47/53 looper letters, 60 selfloop transitions, 3 changer transitions 0/70 dead transitions. [2024-11-09 10:53:23,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 70 transitions, 326 flow [2024-11-09 10:53:23,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:53:23,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:53:23,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 123 transitions. [2024-11-09 10:53:23,314 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5801886792452831 [2024-11-09 10:53:23,314 INFO L175 Difference]: Start difference. First operand has 52 places, 50 transitions, 157 flow. Second operand 4 states and 123 transitions. [2024-11-09 10:53:23,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 70 transitions, 326 flow [2024-11-09 10:53:23,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 70 transitions, 314 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-09 10:53:23,318 INFO L231 Difference]: Finished difference. Result has 53 places, 51 transitions, 163 flow [2024-11-09 10:53:23,318 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=163, PETRI_PLACES=53, PETRI_TRANSITIONS=51} [2024-11-09 10:53:23,319 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 1 predicate places. [2024-11-09 10:53:23,320 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 51 transitions, 163 flow [2024-11-09 10:53:23,320 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:23,320 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:53:23,320 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:53:23,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-09 10:53:23,521 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:53:23,521 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-09 10:53:23,522 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:53:23,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1053420534, now seen corresponding path program 1 times [2024-11-09 10:53:23,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:53:23,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179801653] [2024-11-09 10:53:23,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:53:23,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:53:23,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:53:23,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:53:23,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:53:23,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179801653] [2024-11-09 10:53:23,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179801653] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:53:23,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:53:23,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:53:23,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107062592] [2024-11-09 10:53:23,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:53:23,590 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:53:23,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:53:23,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:53:23,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:53:23,594 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 53 [2024-11-09 10:53:23,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 51 transitions, 163 flow. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:23,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:53:23,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 53 [2024-11-09 10:53:23,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:53:23,727 INFO L124 PetriNetUnfolderBase]: 482/938 cut-off events. [2024-11-09 10:53:23,727 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2024-11-09 10:53:23,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1892 conditions, 938 events. 482/938 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 5477 event pairs, 312 based on Foata normal form. 27/707 useless extension candidates. Maximal degree in co-relation 1514. Up to 664 conditions per place. [2024-11-09 10:53:23,732 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 59 selfloop transitions, 3 changer transitions 1/73 dead transitions. [2024-11-09 10:53:23,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 73 transitions, 366 flow [2024-11-09 10:53:23,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:53:23,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:53:23,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 139 transitions. [2024-11-09 10:53:23,733 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6556603773584906 [2024-11-09 10:53:23,733 INFO L175 Difference]: Start difference. First operand has 53 places, 51 transitions, 163 flow. Second operand 4 states and 139 transitions. [2024-11-09 10:53:23,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 73 transitions, 366 flow [2024-11-09 10:53:23,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 73 transitions, 360 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:53:23,734 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 180 flow [2024-11-09 10:53:23,734 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=180, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2024-11-09 10:53:23,735 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 3 predicate places. [2024-11-09 10:53:23,735 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 180 flow [2024-11-09 10:53:23,735 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:23,735 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:53:23,735 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:53:23,735 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-09 10:53:23,736 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-09 10:53:23,736 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:53:23,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1046142427, now seen corresponding path program 1 times [2024-11-09 10:53:23,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:53:23,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618162248] [2024-11-09 10:53:23,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:53:23,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:53:23,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:53:23,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:53:23,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:53:23,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618162248] [2024-11-09 10:53:23,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618162248] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:53:23,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:53:23,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 10:53:23,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616472246] [2024-11-09 10:53:23,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:53:23,834 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 10:53:23,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:53:23,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 10:53:23,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 10:53:23,882 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 53 [2024-11-09 10:53:23,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 180 flow. Second operand has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:23,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:53:23,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 53 [2024-11-09 10:53:23,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:53:23,985 INFO L124 PetriNetUnfolderBase]: 417/823 cut-off events. [2024-11-09 10:53:23,986 INFO L125 PetriNetUnfolderBase]: For 79/103 co-relation queries the response was YES. [2024-11-09 10:53:23,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1850 conditions, 823 events. 417/823 cut-off events. For 79/103 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 4575 event pairs, 279 based on Foata normal form. 0/670 useless extension candidates. Maximal degree in co-relation 1483. Up to 676 conditions per place. [2024-11-09 10:53:23,989 INFO L140 encePairwiseOnDemand]: 48/53 looper letters, 34 selfloop transitions, 6 changer transitions 0/49 dead transitions. [2024-11-09 10:53:23,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 49 transitions, 252 flow [2024-11-09 10:53:23,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:53:23,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:53:23,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-11-09 10:53:23,991 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4528301886792453 [2024-11-09 10:53:23,991 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 180 flow. Second operand 5 states and 120 transitions. [2024-11-09 10:53:23,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 49 transitions, 252 flow [2024-11-09 10:53:23,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 49 transitions, 247 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:53:23,993 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 179 flow [2024-11-09 10:53:23,993 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=179, PETRI_PLACES=55, PETRI_TRANSITIONS=49} [2024-11-09 10:53:23,994 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 3 predicate places. [2024-11-09 10:53:23,994 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 179 flow [2024-11-09 10:53:23,994 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:23,994 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:53:23,994 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:53:23,994 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-09 10:53:23,995 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-09 10:53:23,995 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:53:23,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1046142426, now seen corresponding path program 1 times [2024-11-09 10:53:23,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:53:23,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965002273] [2024-11-09 10:53:23,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:53:23,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:53:24,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:53:24,170 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:53:24,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:53:24,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965002273] [2024-11-09 10:53:24,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965002273] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:53:24,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:53:24,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:53:24,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522839009] [2024-11-09 10:53:24,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:53:24,171 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:53:24,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:53:24,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:53:24,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:53:24,195 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 53 [2024-11-09 10:53:24,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 49 transitions, 179 flow. Second operand has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:24,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:53:24,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 53 [2024-11-09 10:53:24,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:53:24,260 INFO L124 PetriNetUnfolderBase]: 260/580 cut-off events. [2024-11-09 10:53:24,261 INFO L125 PetriNetUnfolderBase]: For 82/94 co-relation queries the response was YES. [2024-11-09 10:53:24,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1247 conditions, 580 events. 260/580 cut-off events. For 82/94 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3191 event pairs, 174 based on Foata normal form. 0/516 useless extension candidates. Maximal degree in co-relation 866. Up to 449 conditions per place. [2024-11-09 10:53:24,263 INFO L140 encePairwiseOnDemand]: 49/53 looper letters, 33 selfloop transitions, 4 changer transitions 0/47 dead transitions. [2024-11-09 10:53:24,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 47 transitions, 245 flow [2024-11-09 10:53:24,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:53:24,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:53:24,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 103 transitions. [2024-11-09 10:53:24,265 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4858490566037736 [2024-11-09 10:53:24,265 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 179 flow. Second operand 4 states and 103 transitions. [2024-11-09 10:53:24,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 47 transitions, 245 flow [2024-11-09 10:53:24,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 47 transitions, 235 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-09 10:53:24,266 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 169 flow [2024-11-09 10:53:24,266 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=169, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2024-11-09 10:53:24,267 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 1 predicate places. [2024-11-09 10:53:24,267 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 169 flow [2024-11-09 10:53:24,267 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:24,267 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:53:24,267 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:53:24,267 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-09 10:53:24,267 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-09 10:53:24,268 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:53:24,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1275096547, now seen corresponding path program 1 times [2024-11-09 10:53:24,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:53:24,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946362931] [2024-11-09 10:53:24,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:53:24,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:53:24,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:53:24,331 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:53:24,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:53:24,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946362931] [2024-11-09 10:53:24,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946362931] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:53:24,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592425205] [2024-11-09 10:53:24,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:53:24,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:53:24,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:53:24,334 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:53:24,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 10:53:24,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:53:24,396 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 10:53:24,397 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:53:24,460 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:53:24,460 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:53:24,508 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:53:24,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592425205] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:53:24,508 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:53:24,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2024-11-09 10:53:24,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335812766] [2024-11-09 10:53:24,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:53:24,509 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-09 10:53:24,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:53:24,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-09 10:53:24,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2024-11-09 10:53:24,636 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 53 [2024-11-09 10:53:24,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 169 flow. Second operand has 15 states, 15 states have (on average 22.066666666666666) internal successors, (331), 15 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:24,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:53:24,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 53 [2024-11-09 10:53:24,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:53:24,869 INFO L124 PetriNetUnfolderBase]: 444/924 cut-off events. [2024-11-09 10:53:24,870 INFO L125 PetriNetUnfolderBase]: For 116/132 co-relation queries the response was YES. [2024-11-09 10:53:24,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1998 conditions, 924 events. 444/924 cut-off events. For 116/132 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 5395 event pairs, 140 based on Foata normal form. 0/786 useless extension candidates. Maximal degree in co-relation 1417. Up to 218 conditions per place. [2024-11-09 10:53:24,873 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 70 selfloop transitions, 20 changer transitions 0/99 dead transitions. [2024-11-09 10:53:24,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 99 transitions, 481 flow [2024-11-09 10:53:24,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 10:53:24,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-09 10:53:24,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 305 transitions. [2024-11-09 10:53:24,875 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5231560891938251 [2024-11-09 10:53:24,875 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 169 flow. Second operand 11 states and 305 transitions. [2024-11-09 10:53:24,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 99 transitions, 481 flow [2024-11-09 10:53:24,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 99 transitions, 476 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:53:24,877 INFO L231 Difference]: Finished difference. Result has 62 places, 51 transitions, 219 flow [2024-11-09 10:53:24,877 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=219, PETRI_PLACES=62, PETRI_TRANSITIONS=51} [2024-11-09 10:53:24,877 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 10 predicate places. [2024-11-09 10:53:24,877 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 51 transitions, 219 flow [2024-11-09 10:53:24,878 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 22.066666666666666) internal successors, (331), 15 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:24,878 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:53:24,878 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:53:24,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-09 10:53:25,081 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,SelfDestructingSolverStorable12 [2024-11-09 10:53:25,081 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-09 10:53:25,082 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:53:25,082 INFO L85 PathProgramCache]: Analyzing trace with hash 279846285, now seen corresponding path program 2 times [2024-11-09 10:53:25,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:53:25,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115693967] [2024-11-09 10:53:25,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:53:25,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:53:25,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:53:25,234 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:53:25,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:53:25,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115693967] [2024-11-09 10:53:25,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115693967] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:53:25,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294703523] [2024-11-09 10:53:25,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:53:25,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:53:25,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:53:25,236 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:53:25,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 10:53:25,296 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 10:53:25,296 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:53:25,297 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-09 10:53:25,298 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:53:25,401 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:53:25,401 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:53:25,464 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2024-11-09 10:53:25,520 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:53:25,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294703523] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:53:25,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:53:25,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2024-11-09 10:53:25,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440607302] [2024-11-09 10:53:25,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:53:25,521 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-09 10:53:25,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:53:25,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-09 10:53:25,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2024-11-09 10:53:25,840 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 53 [2024-11-09 10:53:25,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 51 transitions, 219 flow. Second operand has 19 states, 19 states have (on average 19.0) internal successors, (361), 19 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:25,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:53:25,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 53 [2024-11-09 10:53:25,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:53:26,289 INFO L124 PetriNetUnfolderBase]: 626/1236 cut-off events. [2024-11-09 10:53:26,289 INFO L125 PetriNetUnfolderBase]: For 268/284 co-relation queries the response was YES. [2024-11-09 10:53:26,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2848 conditions, 1236 events. 626/1236 cut-off events. For 268/284 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7327 event pairs, 184 based on Foata normal form. 56/1182 useless extension candidates. Maximal degree in co-relation 2011. Up to 242 conditions per place. [2024-11-09 10:53:26,294 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 79 selfloop transitions, 15 changer transitions 0/101 dead transitions. [2024-11-09 10:53:26,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 101 transitions, 532 flow [2024-11-09 10:53:26,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 10:53:26,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-09 10:53:26,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 268 transitions. [2024-11-09 10:53:26,296 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5056603773584906 [2024-11-09 10:53:26,296 INFO L175 Difference]: Start difference. First operand has 62 places, 51 transitions, 219 flow. Second operand 10 states and 268 transitions. [2024-11-09 10:53:26,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 101 transitions, 532 flow [2024-11-09 10:53:26,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 101 transitions, 519 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-09 10:53:26,298 INFO L231 Difference]: Finished difference. Result has 69 places, 52 transitions, 251 flow [2024-11-09 10:53:26,298 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=251, PETRI_PLACES=69, PETRI_TRANSITIONS=52} [2024-11-09 10:53:26,299 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 17 predicate places. [2024-11-09 10:53:26,299 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 52 transitions, 251 flow [2024-11-09 10:53:26,299 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 19.0) internal successors, (361), 19 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:26,299 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:53:26,299 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:53:26,312 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 10:53:26,503 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:53:26,504 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-09 10:53:26,504 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:53:26,504 INFO L85 PathProgramCache]: Analyzing trace with hash 304723119, now seen corresponding path program 1 times [2024-11-09 10:53:26,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:53:26,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648906900] [2024-11-09 10:53:26,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:53:26,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:53:26,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:53:26,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:53:26,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:53:26,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648906900] [2024-11-09 10:53:26,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648906900] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:53:26,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:53:26,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:53:26,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306990637] [2024-11-09 10:53:26,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:53:26,551 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:53:26,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:53:26,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:53:26,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:53:26,566 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 53 [2024-11-09 10:53:26,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 52 transitions, 251 flow. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:26,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:53:26,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 53 [2024-11-09 10:53:26,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:53:26,678 INFO L124 PetriNetUnfolderBase]: 518/1068 cut-off events. [2024-11-09 10:53:26,678 INFO L125 PetriNetUnfolderBase]: For 654/670 co-relation queries the response was YES. [2024-11-09 10:53:26,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2622 conditions, 1068 events. 518/1068 cut-off events. For 654/670 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 6192 event pairs, 140 based on Foata normal form. 32/996 useless extension candidates. Maximal degree in co-relation 1808. Up to 565 conditions per place. [2024-11-09 10:53:26,682 INFO L140 encePairwiseOnDemand]: 49/53 looper letters, 47 selfloop transitions, 5 changer transitions 0/61 dead transitions. [2024-11-09 10:53:26,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 61 transitions, 376 flow [2024-11-09 10:53:26,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:53:26,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:53:26,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 118 transitions. [2024-11-09 10:53:26,683 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5566037735849056 [2024-11-09 10:53:26,683 INFO L175 Difference]: Start difference. First operand has 69 places, 52 transitions, 251 flow. Second operand 4 states and 118 transitions. [2024-11-09 10:53:26,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 61 transitions, 376 flow [2024-11-09 10:53:26,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 61 transitions, 341 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-11-09 10:53:26,685 INFO L231 Difference]: Finished difference. Result has 66 places, 50 transitions, 218 flow [2024-11-09 10:53:26,685 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=218, PETRI_PLACES=66, PETRI_TRANSITIONS=50} [2024-11-09 10:53:26,686 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 14 predicate places. [2024-11-09 10:53:26,686 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 50 transitions, 218 flow [2024-11-09 10:53:26,686 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:26,686 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:53:26,686 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:53:26,686 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-09 10:53:26,686 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-09 10:53:26,686 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:53:26,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1424963627, now seen corresponding path program 3 times [2024-11-09 10:53:26,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:53:26,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561543969] [2024-11-09 10:53:26,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:53:26,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:53:26,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:53:26,801 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:53:26,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:53:26,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561543969] [2024-11-09 10:53:26,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561543969] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:53:26,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363354304] [2024-11-09 10:53:26,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 10:53:26,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:53:26,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:53:26,804 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:53:26,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 10:53:26,864 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-09 10:53:26,864 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:53:26,865 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-09 10:53:26,866 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:53:26,964 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:53:26,964 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:53:27,095 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2024-11-09 10:53:27,105 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:53:27,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363354304] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:53:27,105 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:53:27,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 20 [2024-11-09 10:53:27,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192598602] [2024-11-09 10:53:27,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:53:27,106 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-09 10:53:27,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:53:27,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-09 10:53:27,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2024-11-09 10:53:27,391 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 53 [2024-11-09 10:53:27,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 50 transitions, 218 flow. Second operand has 20 states, 20 states have (on average 19.45) internal successors, (389), 20 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:27,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:53:27,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 53 [2024-11-09 10:53:27,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:53:27,952 INFO L124 PetriNetUnfolderBase]: 948/1740 cut-off events. [2024-11-09 10:53:27,953 INFO L125 PetriNetUnfolderBase]: For 691/701 co-relation queries the response was YES. [2024-11-09 10:53:27,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4327 conditions, 1740 events. 948/1740 cut-off events. For 691/701 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 10282 event pairs, 264 based on Foata normal form. 32/1627 useless extension candidates. Maximal degree in co-relation 3070. Up to 376 conditions per place. [2024-11-09 10:53:27,962 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 90 selfloop transitions, 29 changer transitions 0/125 dead transitions. [2024-11-09 10:53:27,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 125 transitions, 681 flow [2024-11-09 10:53:27,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-09 10:53:27,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-09 10:53:27,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 435 transitions. [2024-11-09 10:53:27,964 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43197616683217477 [2024-11-09 10:53:27,964 INFO L175 Difference]: Start difference. First operand has 66 places, 50 transitions, 218 flow. Second operand 19 states and 435 transitions. [2024-11-09 10:53:27,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 125 transitions, 681 flow [2024-11-09 10:53:27,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 125 transitions, 657 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-09 10:53:27,967 INFO L231 Difference]: Finished difference. Result has 82 places, 58 transitions, 323 flow [2024-11-09 10:53:27,967 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=323, PETRI_PLACES=82, PETRI_TRANSITIONS=58} [2024-11-09 10:53:27,968 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 30 predicate places. [2024-11-09 10:53:27,968 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 58 transitions, 323 flow [2024-11-09 10:53:27,969 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 19.45) internal successors, (389), 20 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:27,969 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:53:27,969 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:53:27,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-09 10:53:28,169 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:53:28,170 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-09 10:53:28,170 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:53:28,170 INFO L85 PathProgramCache]: Analyzing trace with hash -765741387, now seen corresponding path program 1 times [2024-11-09 10:53:28,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:53:28,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117813744] [2024-11-09 10:53:28,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:53:28,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:53:28,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:53:28,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:53:28,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:53:28,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117813744] [2024-11-09 10:53:28,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117813744] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:53:28,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:53:28,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:53:28,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896357844] [2024-11-09 10:53:28,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:53:28,218 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:53:28,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:53:28,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:53:28,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:53:28,219 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 53 [2024-11-09 10:53:28,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 58 transitions, 323 flow. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:28,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:53:28,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 53 [2024-11-09 10:53:28,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:53:28,369 INFO L124 PetriNetUnfolderBase]: 833/1728 cut-off events. [2024-11-09 10:53:28,369 INFO L125 PetriNetUnfolderBase]: For 1581/1605 co-relation queries the response was YES. [2024-11-09 10:53:28,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4315 conditions, 1728 events. 833/1728 cut-off events. For 1581/1605 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 11252 event pairs, 372 based on Foata normal form. 6/1550 useless extension candidates. Maximal degree in co-relation 3251. Up to 891 conditions per place. [2024-11-09 10:53:28,375 INFO L140 encePairwiseOnDemand]: 50/53 looper letters, 62 selfloop transitions, 2 changer transitions 3/78 dead transitions. [2024-11-09 10:53:28,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 78 transitions, 562 flow [2024-11-09 10:53:28,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:53:28,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:53:28,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 100 transitions. [2024-11-09 10:53:28,377 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6289308176100629 [2024-11-09 10:53:28,377 INFO L175 Difference]: Start difference. First operand has 82 places, 58 transitions, 323 flow. Second operand 3 states and 100 transitions. [2024-11-09 10:53:28,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 78 transitions, 562 flow [2024-11-09 10:53:28,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 78 transitions, 502 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-11-09 10:53:28,380 INFO L231 Difference]: Finished difference. Result has 74 places, 58 transitions, 275 flow [2024-11-09 10:53:28,380 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=275, PETRI_PLACES=74, PETRI_TRANSITIONS=58} [2024-11-09 10:53:28,380 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 22 predicate places. [2024-11-09 10:53:28,381 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 58 transitions, 275 flow [2024-11-09 10:53:28,381 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:28,381 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:53:28,381 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:53:28,381 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-09 10:53:28,381 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-09 10:53:28,381 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:53:28,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1032067254, now seen corresponding path program 1 times [2024-11-09 10:53:28,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:53:28,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150535361] [2024-11-09 10:53:28,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:53:28,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:53:28,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:53:28,424 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:53:28,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:53:28,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150535361] [2024-11-09 10:53:28,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150535361] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:53:28,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:53:28,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:53:28,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271294416] [2024-11-09 10:53:28,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:53:28,425 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:53:28,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:53:28,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:53:28,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:53:28,428 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 53 [2024-11-09 10:53:28,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 58 transitions, 275 flow. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:28,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:53:28,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 53 [2024-11-09 10:53:28,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:53:28,529 INFO L124 PetriNetUnfolderBase]: 703/1430 cut-off events. [2024-11-09 10:53:28,529 INFO L125 PetriNetUnfolderBase]: For 1033/1063 co-relation queries the response was YES. [2024-11-09 10:53:28,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3798 conditions, 1430 events. 703/1430 cut-off events. For 1033/1063 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 8578 event pairs, 274 based on Foata normal form. 32/1344 useless extension candidates. Maximal degree in co-relation 3754. Up to 906 conditions per place. [2024-11-09 10:53:28,535 INFO L140 encePairwiseOnDemand]: 50/53 looper letters, 55 selfloop transitions, 2 changer transitions 9/77 dead transitions. [2024-11-09 10:53:28,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 77 transitions, 503 flow [2024-11-09 10:53:28,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:53:28,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:53:28,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 99 transitions. [2024-11-09 10:53:28,536 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6226415094339622 [2024-11-09 10:53:28,536 INFO L175 Difference]: Start difference. First operand has 74 places, 58 transitions, 275 flow. Second operand 3 states and 99 transitions. [2024-11-09 10:53:28,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 77 transitions, 503 flow [2024-11-09 10:53:28,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 77 transitions, 497 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-09 10:53:28,540 INFO L231 Difference]: Finished difference. Result has 74 places, 59 transitions, 284 flow [2024-11-09 10:53:28,541 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=284, PETRI_PLACES=74, PETRI_TRANSITIONS=59} [2024-11-09 10:53:28,541 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 22 predicate places. [2024-11-09 10:53:28,541 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 59 transitions, 284 flow [2024-11-09 10:53:28,541 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:28,541 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:53:28,542 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:53:28,542 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-09 10:53:28,542 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-09 10:53:28,542 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:53:28,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1067175515, now seen corresponding path program 1 times [2024-11-09 10:53:28,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:53:28,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273546749] [2024-11-09 10:53:28,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:53:28,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:53:28,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:53:29,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:53:29,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:53:29,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273546749] [2024-11-09 10:53:29,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273546749] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:53:29,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709464975] [2024-11-09 10:53:29,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:53:29,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:53:29,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:53:29,020 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:53:29,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 10:53:29,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:53:29,089 INFO L255 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-09 10:53:29,091 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:53:29,138 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-09 10:53:29,311 INFO L349 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2024-11-09 10:53:29,312 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 10 [2024-11-09 10:53:29,333 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:53:29,333 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:53:42,692 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:53:42,692 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 154 treesize of output 150 [2024-11-09 10:53:42,741 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:53:42,741 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 40 [2024-11-09 10:53:42,781 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:53:42,782 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 231 treesize of output 247 [2024-11-09 10:53:43,108 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:53:43,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 75 [2024-11-09 10:53:43,183 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-09 10:53:43,183 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 18 [2024-11-09 10:53:43,236 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:53:43,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709464975] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:53:43,238 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:53:43,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 26 [2024-11-09 10:53:43,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187244042] [2024-11-09 10:53:43,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:53:43,239 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-09 10:53:43,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:53:43,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-09 10:53:43,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=559, Unknown=3, NotChecked=0, Total=702 [2024-11-09 10:53:47,256 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 10:53:51,281 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 10:53:55,292 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 10:53:59,303 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 10:54:03,310 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 10:54:07,320 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 10:54:11,334 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 10:54:15,352 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 10:54:19,369 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 10:54:23,389 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 10:54:27,403 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 10:54:31,416 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 10:54:35,431 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 10:54:39,438 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 10:54:43,453 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 10:54:43,454 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 53 [2024-11-09 10:54:43,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 59 transitions, 284 flow. Second operand has 27 states, 27 states have (on average 9.0) internal successors, (243), 27 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:54:43,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:54:43,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 53 [2024-11-09 10:54:43,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:54:45,536 INFO L124 PetriNetUnfolderBase]: 3670/6492 cut-off events. [2024-11-09 10:54:45,536 INFO L125 PetriNetUnfolderBase]: For 5286/5286 co-relation queries the response was YES. [2024-11-09 10:54:45,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18223 conditions, 6492 events. 3670/6492 cut-off events. For 5286/5286 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 41868 event pairs, 49 based on Foata normal form. 6/5724 useless extension candidates. Maximal degree in co-relation 13086. Up to 1155 conditions per place. [2024-11-09 10:54:45,560 INFO L140 encePairwiseOnDemand]: 37/53 looper letters, 234 selfloop transitions, 53 changer transitions 144/434 dead transitions. [2024-11-09 10:54:45,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 434 transitions, 2876 flow [2024-11-09 10:54:45,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-09 10:54:45,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-11-09 10:54:45,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 492 transitions. [2024-11-09 10:54:45,563 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.28130360205831906 [2024-11-09 10:54:45,563 INFO L175 Difference]: Start difference. First operand has 74 places, 59 transitions, 284 flow. Second operand 33 states and 492 transitions. [2024-11-09 10:54:45,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 434 transitions, 2876 flow [2024-11-09 10:54:45,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 434 transitions, 2815 flow, removed 26 selfloop flow, removed 2 redundant places. [2024-11-09 10:54:45,575 INFO L231 Difference]: Finished difference. Result has 122 places, 102 transitions, 794 flow [2024-11-09 10:54:45,575 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=794, PETRI_PLACES=122, PETRI_TRANSITIONS=102} [2024-11-09 10:54:45,575 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 70 predicate places. [2024-11-09 10:54:45,575 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 102 transitions, 794 flow [2024-11-09 10:54:45,576 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 9.0) internal successors, (243), 27 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:54:45,576 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:54:45,576 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:54:45,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-09 10:54:45,779 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:54:45,780 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-09 10:54:45,780 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:54:45,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1436932370, now seen corresponding path program 2 times [2024-11-09 10:54:45,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:54:45,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148111774] [2024-11-09 10:54:45,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:45,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:54:45,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:45,852 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 10:54:45,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:54:45,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148111774] [2024-11-09 10:54:45,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148111774] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:54:45,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348164253] [2024-11-09 10:54:45,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:54:45,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:54:45,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:54:45,854 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:54:45,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 10:54:45,927 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 10:54:45,927 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:54:45,929 INFO L255 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-09 10:54:45,930 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:54:45,962 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 10:54:45,963 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:54:46,050 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:54:46,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348164253] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:54:46,051 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:54:46,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 4] total 6 [2024-11-09 10:54:46,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758065244] [2024-11-09 10:54:46,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:54:46,051 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 10:54:46,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:54:46,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 10:54:46,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-11-09 10:54:46,059 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 53 [2024-11-09 10:54:46,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 102 transitions, 794 flow. Second operand has 7 states, 7 states have (on average 27.571428571428573) internal successors, (193), 7 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:54:46,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:54:46,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 53 [2024-11-09 10:54:46,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:54:46,359 INFO L124 PetriNetUnfolderBase]: 1593/3487 cut-off events. [2024-11-09 10:54:46,360 INFO L125 PetriNetUnfolderBase]: For 25351/25419 co-relation queries the response was YES. [2024-11-09 10:54:46,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14665 conditions, 3487 events. 1593/3487 cut-off events. For 25351/25419 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 23811 event pairs, 423 based on Foata normal form. 77/3470 useless extension candidates. Maximal degree in co-relation 10291. Up to 1064 conditions per place. [2024-11-09 10:54:46,380 INFO L140 encePairwiseOnDemand]: 50/53 looper letters, 110 selfloop transitions, 17 changer transitions 10/156 dead transitions. [2024-11-09 10:54:46,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 156 transitions, 1550 flow [2024-11-09 10:54:46,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:54:46,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:54:46,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 138 transitions. [2024-11-09 10:54:46,381 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6509433962264151 [2024-11-09 10:54:46,381 INFO L175 Difference]: Start difference. First operand has 122 places, 102 transitions, 794 flow. Second operand 4 states and 138 transitions. [2024-11-09 10:54:46,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 156 transitions, 1550 flow [2024-11-09 10:54:46,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 156 transitions, 1252 flow, removed 121 selfloop flow, removed 13 redundant places. [2024-11-09 10:54:46,416 INFO L231 Difference]: Finished difference. Result has 106 places, 102 transitions, 715 flow [2024-11-09 10:54:46,416 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=628, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=715, PETRI_PLACES=106, PETRI_TRANSITIONS=102} [2024-11-09 10:54:46,416 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 54 predicate places. [2024-11-09 10:54:46,416 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 102 transitions, 715 flow [2024-11-09 10:54:46,417 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 27.571428571428573) internal successors, (193), 7 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:54:46,417 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:54:46,417 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:54:46,434 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-09 10:54:46,617 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:54:46,618 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-09 10:54:46,618 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:54:46,618 INFO L85 PathProgramCache]: Analyzing trace with hash -796443287, now seen corresponding path program 1 times [2024-11-09 10:54:46,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:54:46,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212407366] [2024-11-09 10:54:46,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:46,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:54:46,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:46,817 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 10:54:46,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:54:46,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212407366] [2024-11-09 10:54:46,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212407366] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:54:46,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:54:46,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-09 10:54:46,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937388716] [2024-11-09 10:54:46,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:54:46,819 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 10:54:46,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:54:46,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 10:54:46,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-09 10:54:46,862 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 53 [2024-11-09 10:54:46,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 102 transitions, 715 flow. Second operand has 7 states, 7 states have (on average 23.714285714285715) internal successors, (166), 7 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:54:46,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:54:46,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 53 [2024-11-09 10:54:46,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:54:47,112 INFO L124 PetriNetUnfolderBase]: 1117/2394 cut-off events. [2024-11-09 10:54:47,112 INFO L125 PetriNetUnfolderBase]: For 6265/6321 co-relation queries the response was YES. [2024-11-09 10:54:47,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8457 conditions, 2394 events. 1117/2394 cut-off events. For 6265/6321 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 13807 event pairs, 333 based on Foata normal form. 36/2397 useless extension candidates. Maximal degree in co-relation 6416. Up to 1716 conditions per place. [2024-11-09 10:54:47,126 INFO L140 encePairwiseOnDemand]: 45/53 looper letters, 70 selfloop transitions, 18 changer transitions 0/101 dead transitions. [2024-11-09 10:54:47,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 101 transitions, 832 flow [2024-11-09 10:54:47,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 10:54:47,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-09 10:54:47,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 162 transitions. [2024-11-09 10:54:47,127 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5094339622641509 [2024-11-09 10:54:47,127 INFO L175 Difference]: Start difference. First operand has 106 places, 102 transitions, 715 flow. Second operand 6 states and 162 transitions. [2024-11-09 10:54:47,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 101 transitions, 832 flow [2024-11-09 10:54:47,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 101 transitions, 777 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-11-09 10:54:47,136 INFO L231 Difference]: Finished difference. Result has 102 places, 90 transitions, 628 flow [2024-11-09 10:54:47,136 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=527, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=628, PETRI_PLACES=102, PETRI_TRANSITIONS=90} [2024-11-09 10:54:47,137 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 50 predicate places. [2024-11-09 10:54:47,137 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 90 transitions, 628 flow [2024-11-09 10:54:47,137 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.714285714285715) internal successors, (166), 7 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:54:47,137 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:54:47,137 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:54:47,137 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-11-09 10:54:47,137 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-09 10:54:47,138 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:54:47,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1729765391, now seen corresponding path program 3 times [2024-11-09 10:54:47,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:54:47,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860542305] [2024-11-09 10:54:47,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:47,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:54:47,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:47,293 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:54:47,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:54:47,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860542305] [2024-11-09 10:54:47,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860542305] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:54:47,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420824795] [2024-11-09 10:54:47,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 10:54:47,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:54:47,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:54:47,296 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:54:47,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 10:54:47,378 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 10:54:47,378 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:54:47,380 INFO L255 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 10:54:47,384 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:54:47,546 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:54:47,546 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:54:47,783 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:54:47,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420824795] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:54:47,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:54:47,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 22 [2024-11-09 10:54:47,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627874500] [2024-11-09 10:54:47,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:54:47,783 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-09 10:54:47,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:54:47,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-09 10:54:47,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2024-11-09 10:54:47,877 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 53 [2024-11-09 10:54:47,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 90 transitions, 628 flow. Second operand has 23 states, 23 states have (on average 22.26086956521739) internal successors, (512), 23 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:54:47,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:54:47,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 53 [2024-11-09 10:54:47,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:54:48,478 INFO L124 PetriNetUnfolderBase]: 2029/3741 cut-off events. [2024-11-09 10:54:48,478 INFO L125 PetriNetUnfolderBase]: For 8152/8198 co-relation queries the response was YES. [2024-11-09 10:54:48,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12990 conditions, 3741 events. 2029/3741 cut-off events. For 8152/8198 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 21289 event pairs, 234 based on Foata normal form. 104/3817 useless extension candidates. Maximal degree in co-relation 9873. Up to 1282 conditions per place. [2024-11-09 10:54:48,492 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 72 selfloop transitions, 19 changer transitions 130/230 dead transitions. [2024-11-09 10:54:48,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 230 transitions, 2001 flow [2024-11-09 10:54:48,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-09 10:54:48,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-09 10:54:48,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 413 transitions. [2024-11-09 10:54:48,493 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48702830188679247 [2024-11-09 10:54:48,493 INFO L175 Difference]: Start difference. First operand has 102 places, 90 transitions, 628 flow. Second operand 16 states and 413 transitions. [2024-11-09 10:54:48,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 230 transitions, 2001 flow [2024-11-09 10:54:48,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 230 transitions, 1911 flow, removed 30 selfloop flow, removed 2 redundant places. [2024-11-09 10:54:48,507 INFO L231 Difference]: Finished difference. Result has 121 places, 77 transitions, 550 flow [2024-11-09 10:54:48,507 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=598, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=550, PETRI_PLACES=121, PETRI_TRANSITIONS=77} [2024-11-09 10:54:48,507 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 69 predicate places. [2024-11-09 10:54:48,507 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 77 transitions, 550 flow [2024-11-09 10:54:48,507 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 22.26086956521739) internal successors, (512), 23 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:54:48,508 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:54:48,508 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:54:48,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-09 10:54:48,711 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-09 10:54:48,712 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-09 10:54:48,712 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:54:48,712 INFO L85 PathProgramCache]: Analyzing trace with hash 751761911, now seen corresponding path program 4 times [2024-11-09 10:54:48,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:54:48,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122385601] [2024-11-09 10:54:48,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:48,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:54:48,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:48,826 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 10:54:48,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:54:48,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122385601] [2024-11-09 10:54:48,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122385601] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:54:48,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689218744] [2024-11-09 10:54:48,827 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 10:54:48,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:54:48,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:54:48,829 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:54:48,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 10:54:48,927 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 10:54:48,927 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:54:48,928 INFO L255 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-09 10:54:48,930 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:54:48,961 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 10:54:48,961 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:54:48,992 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 10:54:48,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689218744] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:54:48,993 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:54:48,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 7 [2024-11-09 10:54:48,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459005619] [2024-11-09 10:54:48,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:54:48,993 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 10:54:48,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:54:48,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 10:54:48,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-09 10:54:49,011 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 53 [2024-11-09 10:54:49,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 77 transitions, 550 flow. Second operand has 7 states, 7 states have (on average 24.857142857142858) internal successors, (174), 7 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:54:49,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:54:49,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 53 [2024-11-09 10:54:49,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:54:49,405 INFO L124 PetriNetUnfolderBase]: 2498/4345 cut-off events. [2024-11-09 10:54:49,406 INFO L125 PetriNetUnfolderBase]: For 10770/10798 co-relation queries the response was YES. [2024-11-09 10:54:49,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15622 conditions, 4345 events. 2498/4345 cut-off events. For 10770/10798 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 23981 event pairs, 259 based on Foata normal form. 87/4428 useless extension candidates. Maximal degree in co-relation 15560. Up to 1394 conditions per place. [2024-11-09 10:54:49,426 INFO L140 encePairwiseOnDemand]: 47/53 looper letters, 114 selfloop transitions, 37 changer transitions 0/157 dead transitions. [2024-11-09 10:54:49,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 157 transitions, 1399 flow [2024-11-09 10:54:49,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 10:54:49,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-09 10:54:49,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-11-09 10:54:49,427 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5013477088948787 [2024-11-09 10:54:49,427 INFO L175 Difference]: Start difference. First operand has 121 places, 77 transitions, 550 flow. Second operand 7 states and 186 transitions. [2024-11-09 10:54:49,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 157 transitions, 1399 flow [2024-11-09 10:54:49,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 157 transitions, 1327 flow, removed 22 selfloop flow, removed 12 redundant places. [2024-11-09 10:54:49,450 INFO L231 Difference]: Finished difference. Result has 103 places, 100 transitions, 798 flow [2024-11-09 10:54:49,450 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=492, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=798, PETRI_PLACES=103, PETRI_TRANSITIONS=100} [2024-11-09 10:54:49,451 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 51 predicate places. [2024-11-09 10:54:49,451 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 100 transitions, 798 flow [2024-11-09 10:54:49,451 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.857142857142858) internal successors, (174), 7 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:54:49,452 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:54:49,452 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:54:49,464 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-09 10:54:49,656 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-09 10:54:49,657 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-09 10:54:49,657 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:54:49,658 INFO L85 PathProgramCache]: Analyzing trace with hash -115793901, now seen corresponding path program 5 times [2024-11-09 10:54:49,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:54:49,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689133409] [2024-11-09 10:54:49,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:49,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:54:49,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:50,877 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:54:50,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:54:50,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689133409] [2024-11-09 10:54:50,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689133409] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:54:50,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992799443] [2024-11-09 10:54:50,878 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-09 10:54:50,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:54:50,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:54:50,880 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:54:50,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 10:54:50,959 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-09 10:54:50,959 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:54:50,961 INFO L255 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-09 10:54:50,962 INFO L278 TraceCheckSpWp]: Computing forward predicates...