./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-channel-sum.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-channel-sum.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 bc55f480d2dabcba35697f502078f181c178ae095f610e1cdbc5d03f14d18670 --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-09 10:50:59,879 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 10:50:59,947 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-09 10:50:59,950 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 10:50:59,951 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 10:50:59,975 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 10:50:59,976 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 10:50:59,976 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 10:50:59,977 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-09 10:50:59,978 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-09 10:50:59,978 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 10:50:59,979 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 10:50:59,979 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 10:50:59,981 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 10:50:59,982 INFO L153 SettingsManager]: * Use SBE=true [2024-11-09 10:50:59,982 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 10:50:59,982 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 10:50:59,982 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 10:50:59,982 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 10:50:59,983 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 10:50:59,983 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-09 10:50:59,984 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-09 10:50:59,984 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-09 10:50:59,984 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 10:50:59,985 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-09 10:50:59,985 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 10:50:59,985 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-09 10:50:59,985 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 10:50:59,985 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 10:50:59,986 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 10:50:59,986 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-09 10:50:59,986 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 10:50:59,986 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 10:50:59,987 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 10:50:59,987 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 10:50:59,987 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 10:50:59,988 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-09 10:50:59,988 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 10:50:59,988 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 10:50:59,988 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-09 10:50:59,989 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-09 10:50:59,989 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 10:50:59,989 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bc55f480d2dabcba35697f502078f181c178ae095f610e1cdbc5d03f14d18670 [2024-11-09 10:51:00,216 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 10:51:00,255 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 10:51:00,259 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 10:51:00,260 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 10:51:00,260 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 10:51:00,261 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2024-11-09 10:51:01,556 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 10:51:01,741 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 10:51:01,742 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2024-11-09 10:51:01,752 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f6939563/bd60f67b2c53493e9684721d08314bf3/FLAG840adb747 [2024-11-09 10:51:02,132 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f6939563/bd60f67b2c53493e9684721d08314bf3 [2024-11-09 10:51:02,134 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 10:51:02,135 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 10:51:02,137 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 10:51:02,137 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 10:51:02,143 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 10:51:02,144 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:51:02" (1/1) ... [2024-11-09 10:51:02,144 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@222798e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:51:02, skipping insertion in model container [2024-11-09 10:51:02,146 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:51:02" (1/1) ... [2024-11-09 10:51:02,172 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 10:51:02,357 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 10:51:02,361 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 10:51:02,372 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 10:51:02,402 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 10:51:02,419 INFO L204 MainTranslator]: Completed translation [2024-11-09 10:51:02,420 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:51:02 WrapperNode [2024-11-09 10:51:02,420 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 10:51:02,421 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 10:51:02,422 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 10:51:02,422 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 10:51:02,428 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:51:02" (1/1) ... [2024-11-09 10:51:02,437 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:51:02" (1/1) ... [2024-11-09 10:51:02,461 INFO L138 Inliner]: procedures = 21, calls = 22, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 137 [2024-11-09 10:51:02,464 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 10:51:02,465 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 10:51:02,465 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 10:51:02,465 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 10:51:02,480 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:51:02" (1/1) ... [2024-11-09 10:51:02,481 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:51:02" (1/1) ... [2024-11-09 10:51:02,487 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:51:02" (1/1) ... [2024-11-09 10:51:02,513 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-09 10:51:02,514 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:51:02" (1/1) ... [2024-11-09 10:51:02,514 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:51:02" (1/1) ... [2024-11-09 10:51:02,524 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:51:02" (1/1) ... [2024-11-09 10:51:02,530 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:51:02" (1/1) ... [2024-11-09 10:51:02,531 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:51:02" (1/1) ... [2024-11-09 10:51:02,536 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:51:02" (1/1) ... [2024-11-09 10:51:02,538 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 10:51:02,539 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 10:51:02,539 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 10:51:02,539 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 10:51:02,540 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:51:02" (1/1) ... [2024-11-09 10:51:02,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 10:51:02,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:51:02,575 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 10:51:02,603 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 10:51:02,657 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 10:51:02,659 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-09 10:51:02,660 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-09 10:51:02,660 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-09 10:51:02,660 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-09 10:51:02,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-09 10:51:02,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-09 10:51:02,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-09 10:51:02,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-09 10:51:02,673 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-09 10:51:02,673 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 10:51:02,673 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 10:51:02,673 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-09 10:51:02,673 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-09 10:51:02,675 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 10:51:02,788 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 10:51:02,790 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 10:51:03,006 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-09 10:51:03,006 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 10:51:03,151 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 10:51:03,151 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-09 10:51:03,152 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:51:03 BoogieIcfgContainer [2024-11-09 10:51:03,152 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 10:51:03,154 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 10:51:03,154 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 10:51:03,157 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 10:51:03,158 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 10:51:02" (1/3) ... [2024-11-09 10:51:03,158 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52556f29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:51:03, skipping insertion in model container [2024-11-09 10:51:03,158 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:51:02" (2/3) ... [2024-11-09 10:51:03,159 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52556f29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:51:03, skipping insertion in model container [2024-11-09 10:51:03,159 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:51:03" (3/3) ... [2024-11-09 10:51:03,164 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-channel-sum.wvr.c [2024-11-09 10:51:03,185 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 10:51:03,185 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2024-11-09 10:51:03,185 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-09 10:51:03,233 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-09 10:51:03,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 50 transitions, 114 flow [2024-11-09 10:51:03,293 INFO L124 PetriNetUnfolderBase]: 5/48 cut-off events. [2024-11-09 10:51:03,293 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-09 10:51:03,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57 conditions, 48 events. 5/48 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 94 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 32. Up to 2 conditions per place. [2024-11-09 10:51:03,297 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 50 transitions, 114 flow [2024-11-09 10:51:03,301 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 49 places, 47 transitions, 106 flow [2024-11-09 10:51:03,313 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 10:51:03,320 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;@887241e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 10:51:03,320 INFO L334 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2024-11-09 10:51:03,324 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-09 10:51:03,326 INFO L124 PetriNetUnfolderBase]: 1/8 cut-off events. [2024-11-09 10:51:03,326 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-09 10:51:03,326 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:51:03,327 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:51:03,328 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:51:03,333 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:51:03,333 INFO L85 PathProgramCache]: Analyzing trace with hash -415194869, now seen corresponding path program 1 times [2024-11-09 10:51:03,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:51:03,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700753431] [2024-11-09 10:51:03,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:51:03,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:51:03,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:51:03,575 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 10:51:03,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:51:03,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700753431] [2024-11-09 10:51:03,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700753431] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:51:03,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:51:03,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:51:03,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051717660] [2024-11-09 10:51:03,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:51:03,593 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:51:03,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:51:03,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:51:03,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:51:03,644 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 50 [2024-11-09 10:51:03,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 47 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 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 10:51:03,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:51:03,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 50 [2024-11-09 10:51:03,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:51:03,810 INFO L124 PetriNetUnfolderBase]: 237/465 cut-off events. [2024-11-09 10:51:03,811 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-11-09 10:51:03,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 852 conditions, 465 events. 237/465 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2148 event pairs, 167 based on Foata normal form. 1/371 useless extension candidates. Maximal degree in co-relation 773. Up to 356 conditions per place. [2024-11-09 10:51:03,848 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 24 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2024-11-09 10:51:03,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 43 transitions, 150 flow [2024-11-09 10:51:03,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:51:03,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:51:03,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 89 transitions. [2024-11-09 10:51:03,863 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5933333333333334 [2024-11-09 10:51:03,865 INFO L175 Difference]: Start difference. First operand has 49 places, 47 transitions, 106 flow. Second operand 3 states and 89 transitions. [2024-11-09 10:51:03,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 43 transitions, 150 flow [2024-11-09 10:51:03,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 43 transitions, 142 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-09 10:51:03,872 INFO L231 Difference]: Finished difference. Result has 44 places, 43 transitions, 94 flow [2024-11-09 10:51:03,875 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=44, PETRI_TRANSITIONS=43} [2024-11-09 10:51:03,880 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, -5 predicate places. [2024-11-09 10:51:03,881 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 43 transitions, 94 flow [2024-11-09 10:51:03,881 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 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 10:51:03,881 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:51:03,881 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:51:03,882 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 10:51:03,882 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:51:03,884 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:51:03,910 INFO L85 PathProgramCache]: Analyzing trace with hash -415194868, now seen corresponding path program 1 times [2024-11-09 10:51:03,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:51:03,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714193555] [2024-11-09 10:51:03,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:51:03,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:51:03,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:51:04,210 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 10:51:04,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:51:04,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714193555] [2024-11-09 10:51:04,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714193555] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:51:04,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:51:04,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:51:04,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370232632] [2024-11-09 10:51:04,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:51:04,212 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:51:04,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:51:04,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:51:04,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:51:04,224 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 50 [2024-11-09 10:51:04,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 43 transitions, 94 flow. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 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 10:51:04,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:51:04,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 50 [2024-11-09 10:51:04,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:51:04,370 INFO L124 PetriNetUnfolderBase]: 238/468 cut-off events. [2024-11-09 10:51:04,372 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2024-11-09 10:51:04,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 843 conditions, 468 events. 238/468 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2149 event pairs, 167 based on Foata normal form. 0/373 useless extension candidates. Maximal degree in co-relation 816. Up to 361 conditions per place. [2024-11-09 10:51:04,376 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 26 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2024-11-09 10:51:04,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 46 transitions, 162 flow [2024-11-09 10:51:04,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:51:04,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:51:04,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 111 transitions. [2024-11-09 10:51:04,381 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.555 [2024-11-09 10:51:04,381 INFO L175 Difference]: Start difference. First operand has 44 places, 43 transitions, 94 flow. Second operand 4 states and 111 transitions. [2024-11-09 10:51:04,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 46 transitions, 162 flow [2024-11-09 10:51:04,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 46 transitions, 156 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:51:04,383 INFO L231 Difference]: Finished difference. Result has 47 places, 46 transitions, 117 flow [2024-11-09 10:51:04,383 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=117, PETRI_PLACES=47, PETRI_TRANSITIONS=46} [2024-11-09 10:51:04,384 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, -2 predicate places. [2024-11-09 10:51:04,384 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 46 transitions, 117 flow [2024-11-09 10:51:04,384 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 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 10:51:04,384 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:51:04,384 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:51:04,384 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 10:51:04,385 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:51:04,385 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:51:04,386 INFO L85 PathProgramCache]: Analyzing trace with hash 429704157, now seen corresponding path program 1 times [2024-11-09 10:51:04,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:51:04,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702135567] [2024-11-09 10:51:04,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:51:04,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:51:04,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:51:04,589 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 10:51:04,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:51:04,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702135567] [2024-11-09 10:51:04,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702135567] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:51:04,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123732642] [2024-11-09 10:51:04,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:51:04,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:51:04,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:51:04,592 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 10:51:04,593 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 10:51:04,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:51:04,653 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 10:51:04,656 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:51:04,706 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 10:51:04,824 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 10:51:04,825 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:51:04,923 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 10:51:04,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123732642] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:51:04,926 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:51:04,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2024-11-09 10:51:04,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528759639] [2024-11-09 10:51:04,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:51:04,926 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 10:51:04,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:51:04,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 10:51:04,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-11-09 10:51:05,029 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 50 [2024-11-09 10:51:05,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 46 transitions, 117 flow. Second operand has 11 states, 11 states have (on average 21.454545454545453) internal successors, (236), 11 states have internal predecessors, (236), 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 10:51:05,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:51:05,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 50 [2024-11-09 10:51:05,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:51:05,300 INFO L124 PetriNetUnfolderBase]: 239/470 cut-off events. [2024-11-09 10:51:05,300 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2024-11-09 10:51:05,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 859 conditions, 470 events. 239/470 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2155 event pairs, 167 based on Foata normal form. 0/374 useless extension candidates. Maximal degree in co-relation 828. Up to 358 conditions per place. [2024-11-09 10:51:05,303 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 22 selfloop transitions, 10 changer transitions 0/48 dead transitions. [2024-11-09 10:51:05,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 48 transitions, 189 flow [2024-11-09 10:51:05,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 10:51:05,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-09 10:51:05,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-11-09 10:51:05,307 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.485 [2024-11-09 10:51:05,307 INFO L175 Difference]: Start difference. First operand has 47 places, 46 transitions, 117 flow. Second operand 8 states and 194 transitions. [2024-11-09 10:51:05,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 48 transitions, 189 flow [2024-11-09 10:51:05,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 48 transitions, 186 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 10:51:05,323 INFO L231 Difference]: Finished difference. Result has 52 places, 48 transitions, 142 flow [2024-11-09 10:51:05,323 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=142, PETRI_PLACES=52, PETRI_TRANSITIONS=48} [2024-11-09 10:51:05,324 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 3 predicate places. [2024-11-09 10:51:05,324 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 48 transitions, 142 flow [2024-11-09 10:51:05,324 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 21.454545454545453) internal successors, (236), 11 states have internal predecessors, (236), 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 10:51:05,325 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:51:05,325 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:51:05,340 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 10:51:05,528 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:51:05,529 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:51:05,529 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:51:05,529 INFO L85 PathProgramCache]: Analyzing trace with hash 438746138, now seen corresponding path program 1 times [2024-11-09 10:51:05,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:51:05,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499757353] [2024-11-09 10:51:05,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:51:05,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:51:05,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:51:05,567 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 10:51:05,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:51:05,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499757353] [2024-11-09 10:51:05,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499757353] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:51:05,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:51:05,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:51:05,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694450364] [2024-11-09 10:51:05,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:51:05,569 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:51:05,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:51:05,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:51:05,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:51:05,577 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 50 [2024-11-09 10:51:05,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 48 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 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 10:51:05,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:51:05,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 50 [2024-11-09 10:51:05,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:51:05,659 INFO L124 PetriNetUnfolderBase]: 225/509 cut-off events. [2024-11-09 10:51:05,660 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-11-09 10:51:05,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 926 conditions, 509 events. 225/509 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2424 event pairs, 88 based on Foata normal form. 0/401 useless extension candidates. Maximal degree in co-relation 888. Up to 254 conditions per place. [2024-11-09 10:51:05,663 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 41 selfloop transitions, 6 changer transitions 0/61 dead transitions. [2024-11-09 10:51:05,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 61 transitions, 264 flow [2024-11-09 10:51:05,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:51:05,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:51:05,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 99 transitions. [2024-11-09 10:51:05,665 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.66 [2024-11-09 10:51:05,665 INFO L175 Difference]: Start difference. First operand has 52 places, 48 transitions, 142 flow. Second operand 3 states and 99 transitions. [2024-11-09 10:51:05,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 61 transitions, 264 flow [2024-11-09 10:51:05,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 61 transitions, 222 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-11-09 10:51:05,667 INFO L231 Difference]: Finished difference. Result has 49 places, 51 transitions, 138 flow [2024-11-09 10:51:05,667 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=49, PETRI_TRANSITIONS=51} [2024-11-09 10:51:05,668 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 0 predicate places. [2024-11-09 10:51:05,668 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 51 transitions, 138 flow [2024-11-09 10:51:05,668 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 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 10:51:05,669 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:51:05,669 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:51:05,669 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-09 10:51:05,669 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:51:05,670 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:51:05,670 INFO L85 PathProgramCache]: Analyzing trace with hash -619351905, now seen corresponding path program 1 times [2024-11-09 10:51:05,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:51:05,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639759941] [2024-11-09 10:51:05,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:51:05,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:51:05,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:51:05,738 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 10:51:05,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:51:05,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639759941] [2024-11-09 10:51:05,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639759941] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:51:05,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:51:05,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 10:51:05,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038556080] [2024-11-09 10:51:05,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:51:05,740 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:51:05,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:51:05,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:51:05,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:51:05,744 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 50 [2024-11-09 10:51:05,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 51 transitions, 138 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 10:51:05,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:51:05,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 50 [2024-11-09 10:51:05,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:51:05,842 INFO L124 PetriNetUnfolderBase]: 247/549 cut-off events. [2024-11-09 10:51:05,842 INFO L125 PetriNetUnfolderBase]: For 138/138 co-relation queries the response was YES. [2024-11-09 10:51:05,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1177 conditions, 549 events. 247/549 cut-off events. For 138/138 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2607 event pairs, 167 based on Foata normal form. 0/478 useless extension candidates. Maximal degree in co-relation 360. Up to 383 conditions per place. [2024-11-09 10:51:05,846 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 43 selfloop transitions, 4 changer transitions 0/63 dead transitions. [2024-11-09 10:51:05,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 63 transitions, 262 flow [2024-11-09 10:51:05,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:51:05,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:51:05,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 126 transitions. [2024-11-09 10:51:05,848 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.63 [2024-11-09 10:51:05,848 INFO L175 Difference]: Start difference. First operand has 49 places, 51 transitions, 138 flow. Second operand 4 states and 126 transitions. [2024-11-09 10:51:05,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 63 transitions, 262 flow [2024-11-09 10:51:05,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 63 transitions, 250 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:51:05,852 INFO L231 Difference]: Finished difference. Result has 51 places, 51 transitions, 139 flow [2024-11-09 10:51:05,853 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=139, PETRI_PLACES=51, PETRI_TRANSITIONS=51} [2024-11-09 10:51:05,853 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 2 predicate places. [2024-11-09 10:51:05,853 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 51 transitions, 139 flow [2024-11-09 10:51:05,854 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 10:51:05,854 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:51:05,854 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:51:05,854 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-09 10:51:05,854 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:51:05,854 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:51:05,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1074049198, now seen corresponding path program 1 times [2024-11-09 10:51:05,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:51:05,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706003562] [2024-11-09 10:51:05,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:51:05,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:51:05,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:51:06,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:51:06,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:51:06,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706003562] [2024-11-09 10:51:06,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706003562] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:51:06,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:51:06,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 10:51:06,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308463350] [2024-11-09 10:51:06,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:51:06,036 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 10:51:06,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:51:06,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 10:51:06,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 10:51:06,091 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-11-09 10:51:06,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 51 transitions, 139 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 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 10:51:06,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:51:06,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-11-09 10:51:06,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:51:06,195 INFO L124 PetriNetUnfolderBase]: 247/555 cut-off events. [2024-11-09 10:51:06,195 INFO L125 PetriNetUnfolderBase]: For 75/75 co-relation queries the response was YES. [2024-11-09 10:51:06,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1163 conditions, 555 events. 247/555 cut-off events. For 75/75 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2625 event pairs, 107 based on Foata normal form. 0/487 useless extension candidates. Maximal degree in co-relation 1011. Up to 300 conditions per place. [2024-11-09 10:51:06,198 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 35 selfloop transitions, 9 changer transitions 0/57 dead transitions. [2024-11-09 10:51:06,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 57 transitions, 246 flow [2024-11-09 10:51:06,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:51:06,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:51:06,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-11-09 10:51:06,200 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.504 [2024-11-09 10:51:06,200 INFO L175 Difference]: Start difference. First operand has 51 places, 51 transitions, 139 flow. Second operand 5 states and 126 transitions. [2024-11-09 10:51:06,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 57 transitions, 246 flow [2024-11-09 10:51:06,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 57 transitions, 238 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-09 10:51:06,201 INFO L231 Difference]: Finished difference. Result has 50 places, 49 transitions, 145 flow [2024-11-09 10:51:06,202 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=145, PETRI_PLACES=50, PETRI_TRANSITIONS=49} [2024-11-09 10:51:06,202 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 1 predicate places. [2024-11-09 10:51:06,202 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 49 transitions, 145 flow [2024-11-09 10:51:06,203 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 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 10:51:06,203 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:51:06,203 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:51:06,203 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-09 10:51:06,203 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:51:06,204 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:51:06,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1074049197, now seen corresponding path program 1 times [2024-11-09 10:51:06,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:51:06,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449702206] [2024-11-09 10:51:06,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:51:06,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:51:06,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:51:06,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:51:06,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:51:06,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449702206] [2024-11-09 10:51:06,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449702206] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:51:06,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:51:06,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:51:06,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933381717] [2024-11-09 10:51:06,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:51:06,244 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:51:06,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:51:06,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:51:06,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:51:06,259 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-11-09 10:51:06,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 49 transitions, 145 flow. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 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 10:51:06,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:51:06,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-11-09 10:51:06,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:51:06,320 INFO L124 PetriNetUnfolderBase]: 247/499 cut-off events. [2024-11-09 10:51:06,321 INFO L125 PetriNetUnfolderBase]: For 156/156 co-relation queries the response was YES. [2024-11-09 10:51:06,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1160 conditions, 499 events. 247/499 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2081 event pairs, 167 based on Foata normal form. 0/451 useless extension candidates. Maximal degree in co-relation 320. Up to 432 conditions per place. [2024-11-09 10:51:06,323 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 31 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2024-11-09 10:51:06,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 46 transitions, 209 flow [2024-11-09 10:51:06,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:51:06,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:51:06,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 97 transitions. [2024-11-09 10:51:06,325 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.485 [2024-11-09 10:51:06,325 INFO L175 Difference]: Start difference. First operand has 50 places, 49 transitions, 145 flow. Second operand 4 states and 97 transitions. [2024-11-09 10:51:06,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 46 transitions, 209 flow [2024-11-09 10:51:06,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 46 transitions, 191 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-09 10:51:06,327 INFO L231 Difference]: Finished difference. Result has 46 places, 46 transitions, 129 flow [2024-11-09 10:51:06,327 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=129, PETRI_PLACES=46, PETRI_TRANSITIONS=46} [2024-11-09 10:51:06,327 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, -3 predicate places. [2024-11-09 10:51:06,328 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 46 transitions, 129 flow [2024-11-09 10:51:06,328 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 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 10:51:06,328 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:51:06,328 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] [2024-11-09 10:51:06,328 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-09 10:51:06,328 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:51:06,329 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:51:06,329 INFO L85 PathProgramCache]: Analyzing trace with hash 792479215, now seen corresponding path program 1 times [2024-11-09 10:51:06,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:51:06,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593434540] [2024-11-09 10:51:06,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:51:06,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:51:06,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:51:06,358 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 10:51:06,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:51:06,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593434540] [2024-11-09 10:51:06,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593434540] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:51:06,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:51:06,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:51:06,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004314477] [2024-11-09 10:51:06,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:51:06,360 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:51:06,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:51:06,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:51:06,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:51:06,360 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 50 [2024-11-09 10:51:06,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 46 transitions, 129 flow. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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 10:51:06,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:51:06,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 50 [2024-11-09 10:51:06,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:51:06,446 INFO L124 PetriNetUnfolderBase]: 354/730 cut-off events. [2024-11-09 10:51:06,446 INFO L125 PetriNetUnfolderBase]: For 108/108 co-relation queries the response was YES. [2024-11-09 10:51:06,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1574 conditions, 730 events. 354/730 cut-off events. For 108/108 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 3242 event pairs, 155 based on Foata normal form. 3/682 useless extension candidates. Maximal degree in co-relation 1414. Up to 365 conditions per place. [2024-11-09 10:51:06,450 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 48 selfloop transitions, 2 changer transitions 3/64 dead transitions. [2024-11-09 10:51:06,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 64 transitions, 287 flow [2024-11-09 10:51:06,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:51:06,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:51:06,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 106 transitions. [2024-11-09 10:51:06,451 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7066666666666667 [2024-11-09 10:51:06,451 INFO L175 Difference]: Start difference. First operand has 46 places, 46 transitions, 129 flow. Second operand 3 states and 106 transitions. [2024-11-09 10:51:06,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 64 transitions, 287 flow [2024-11-09 10:51:06,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 64 transitions, 282 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:51:06,453 INFO L231 Difference]: Finished difference. Result has 47 places, 45 transitions, 128 flow [2024-11-09 10:51:06,453 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=124, 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=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=47, PETRI_TRANSITIONS=45} [2024-11-09 10:51:06,454 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, -2 predicate places. [2024-11-09 10:51:06,454 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 45 transitions, 128 flow [2024-11-09 10:51:06,454 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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 10:51:06,454 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:51:06,454 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] [2024-11-09 10:51:06,454 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-09 10:51:06,455 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:51:06,455 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:51:06,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1486721596, now seen corresponding path program 1 times [2024-11-09 10:51:06,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:51:06,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292876229] [2024-11-09 10:51:06,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:51:06,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:51:06,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:51:06,578 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 10:51:06,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:51:06,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292876229] [2024-11-09 10:51:06,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292876229] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:51:06,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:51:06,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-09 10:51:06,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645925989] [2024-11-09 10:51:06,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:51:06,579 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 10:51:06,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:51:06,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 10:51:06,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-09 10:51:06,637 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-11-09 10:51:06,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 45 transitions, 128 flow. Second operand has 7 states, 7 states have (on average 20.428571428571427) internal successors, (143), 7 states have internal predecessors, (143), 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 10:51:06,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:51:06,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-11-09 10:51:06,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:51:06,849 INFO L124 PetriNetUnfolderBase]: 333/661 cut-off events. [2024-11-09 10:51:06,850 INFO L125 PetriNetUnfolderBase]: For 76/76 co-relation queries the response was YES. [2024-11-09 10:51:06,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1485 conditions, 661 events. 333/661 cut-off events. For 76/76 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2889 event pairs, 51 based on Foata normal form. 0/592 useless extension candidates. Maximal degree in co-relation 1447. Up to 238 conditions per place. [2024-11-09 10:51:06,854 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 64 selfloop transitions, 12 changer transitions 3/87 dead transitions. [2024-11-09 10:51:06,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 87 transitions, 400 flow [2024-11-09 10:51:06,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 10:51:06,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-09 10:51:06,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 196 transitions. [2024-11-09 10:51:06,856 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.56 [2024-11-09 10:51:06,856 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 128 flow. Second operand 7 states and 196 transitions. [2024-11-09 10:51:06,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 87 transitions, 400 flow [2024-11-09 10:51:06,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 87 transitions, 386 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-11-09 10:51:06,860 INFO L231 Difference]: Finished difference. Result has 53 places, 49 transitions, 170 flow [2024-11-09 10:51:06,860 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=170, PETRI_PLACES=53, PETRI_TRANSITIONS=49} [2024-11-09 10:51:06,861 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 4 predicate places. [2024-11-09 10:51:06,861 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 49 transitions, 170 flow [2024-11-09 10:51:06,862 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.428571428571427) internal successors, (143), 7 states have internal predecessors, (143), 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 10:51:06,862 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:51:06,862 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:51:06,863 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-09 10:51:06,863 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:51:06,864 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:51:06,864 INFO L85 PathProgramCache]: Analyzing trace with hash -811085535, now seen corresponding path program 1 times [2024-11-09 10:51:06,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:51:06,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887202244] [2024-11-09 10:51:06,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:51:06,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:51:06,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:51:07,044 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:51:07,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:51:07,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887202244] [2024-11-09 10:51:07,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887202244] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:51:07,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145280220] [2024-11-09 10:51:07,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:51:07,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:51:07,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:51:07,050 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 10:51:07,051 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 10:51:07,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:51:07,107 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 10:51:07,108 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:51:07,147 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:51:07,147 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 10:51:07,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145280220] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:51:07,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 10:51:07,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2024-11-09 10:51:07,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906561742] [2024-11-09 10:51:07,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:51:07,148 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:51:07,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:51:07,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:51:07,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-11-09 10:51:07,158 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 50 [2024-11-09 10:51:07,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 49 transitions, 170 flow. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 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 10:51:07,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:51:07,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 50 [2024-11-09 10:51:07,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:51:07,320 INFO L124 PetriNetUnfolderBase]: 655/1309 cut-off events. [2024-11-09 10:51:07,320 INFO L125 PetriNetUnfolderBase]: For 557/557 co-relation queries the response was YES. [2024-11-09 10:51:07,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3116 conditions, 1309 events. 655/1309 cut-off events. For 557/557 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 6540 event pairs, 191 based on Foata normal form. 16/1221 useless extension candidates. Maximal degree in co-relation 3071. Up to 449 conditions per place. [2024-11-09 10:51:07,327 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 62 selfloop transitions, 13 changer transitions 0/84 dead transitions. [2024-11-09 10:51:07,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 84 transitions, 440 flow [2024-11-09 10:51:07,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:51:07,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:51:07,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 136 transitions. [2024-11-09 10:51:07,328 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.68 [2024-11-09 10:51:07,328 INFO L175 Difference]: Start difference. First operand has 53 places, 49 transitions, 170 flow. Second operand 4 states and 136 transitions. [2024-11-09 10:51:07,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 84 transitions, 440 flow [2024-11-09 10:51:07,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 84 transitions, 437 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 10:51:07,330 INFO L231 Difference]: Finished difference. Result has 57 places, 57 transitions, 258 flow [2024-11-09 10:51:07,331 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=258, PETRI_PLACES=57, PETRI_TRANSITIONS=57} [2024-11-09 10:51:07,331 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 8 predicate places. [2024-11-09 10:51:07,332 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 57 transitions, 258 flow [2024-11-09 10:51:07,332 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 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 10:51:07,332 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:51:07,332 INFO L204 CegarLoopForPetriNet]: trace histogram [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 10:51:07,347 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 10:51:07,533 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,SelfDestructingSolverStorable9 [2024-11-09 10:51:07,533 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:51:07,533 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:51:07,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1777425387, now seen corresponding path program 1 times [2024-11-09 10:51:07,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:51:07,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160272224] [2024-11-09 10:51:07,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:51:07,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:51:07,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:51:07,715 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:51:07,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:51:07,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160272224] [2024-11-09 10:51:07,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160272224] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:51:07,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500264457] [2024-11-09 10:51:07,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:51:07,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:51:07,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:51:07,718 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 10:51:07,720 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 10:51:07,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:51:07,782 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 10:51:07,784 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:51:07,929 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:51:07,929 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:51:08,066 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:51:08,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500264457] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:51:08,066 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:51:08,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-11-09 10:51:08,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553804969] [2024-11-09 10:51:08,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:51:08,067 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-09 10:51:08,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:51:08,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-09 10:51:08,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2024-11-09 10:51:08,235 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-11-09 10:51:08,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 57 transitions, 258 flow. Second operand has 17 states, 17 states have (on average 19.41176470588235) internal successors, (330), 17 states have internal predecessors, (330), 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 10:51:08,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:51:08,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-11-09 10:51:08,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:51:08,587 INFO L124 PetriNetUnfolderBase]: 786/1520 cut-off events. [2024-11-09 10:51:08,588 INFO L125 PetriNetUnfolderBase]: For 1328/1328 co-relation queries the response was YES. [2024-11-09 10:51:08,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4197 conditions, 1520 events. 786/1520 cut-off events. For 1328/1328 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 7600 event pairs, 536 based on Foata normal form. 0/1416 useless extension candidates. Maximal degree in co-relation 3621. Up to 1186 conditions per place. [2024-11-09 10:51:08,599 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 64 selfloop transitions, 15 changer transitions 2/89 dead transitions. [2024-11-09 10:51:08,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 89 transitions, 532 flow [2024-11-09 10:51:08,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 10:51:08,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-09 10:51:08,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 243 transitions. [2024-11-09 10:51:08,601 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44181818181818183 [2024-11-09 10:51:08,601 INFO L175 Difference]: Start difference. First operand has 57 places, 57 transitions, 258 flow. Second operand 11 states and 243 transitions. [2024-11-09 10:51:08,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 89 transitions, 532 flow [2024-11-09 10:51:08,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 89 transitions, 532 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-09 10:51:08,605 INFO L231 Difference]: Finished difference. Result has 72 places, 64 transitions, 367 flow [2024-11-09 10:51:08,605 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=367, PETRI_PLACES=72, PETRI_TRANSITIONS=64} [2024-11-09 10:51:08,605 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 23 predicate places. [2024-11-09 10:51:08,606 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 64 transitions, 367 flow [2024-11-09 10:51:08,606 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 19.41176470588235) internal successors, (330), 17 states have internal predecessors, (330), 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 10:51:08,606 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:51:08,606 INFO L204 CegarLoopForPetriNet]: trace histogram [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 10:51:08,621 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 10:51:08,810 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:51:08,810 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:51:08,811 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:51:08,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1357682648, now seen corresponding path program 2 times [2024-11-09 10:51:08,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:51:08,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870126163] [2024-11-09 10:51:08,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:51:08,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:51:08,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:51:09,049 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 10:51:09,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:51:09,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870126163] [2024-11-09 10:51:09,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870126163] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:51:09,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799117258] [2024-11-09 10:51:09,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:51:09,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:51:09,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:51:09,055 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 10:51:09,058 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 10:51:09,132 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-09 10:51:09,132 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:51:09,137 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-09 10:51:09,140 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:51:09,151 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 10:51:09,515 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-09 10:51:09,516 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:51:09,863 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-09 10:51:09,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799117258] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:51:09,864 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:51:09,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 15 [2024-11-09 10:51:09,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275756096] [2024-11-09 10:51:09,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:51:09,865 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-09 10:51:09,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:51:09,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-09 10:51:09,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2024-11-09 10:51:10,092 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-11-09 10:51:10,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 64 transitions, 367 flow. Second operand has 16 states, 16 states have (on average 20.0) internal successors, (320), 16 states have internal predecessors, (320), 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 10:51:10,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:51:10,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-11-09 10:51:10,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:51:10,436 INFO L124 PetriNetUnfolderBase]: 736/1490 cut-off events. [2024-11-09 10:51:10,437 INFO L125 PetriNetUnfolderBase]: For 2026/2026 co-relation queries the response was YES. [2024-11-09 10:51:10,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4344 conditions, 1490 events. 736/1490 cut-off events. For 2026/2026 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 7542 event pairs, 122 based on Foata normal form. 32/1462 useless extension candidates. Maximal degree in co-relation 3697. Up to 596 conditions per place. [2024-11-09 10:51:10,447 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 48 selfloop transitions, 36 changer transitions 2/94 dead transitions. [2024-11-09 10:51:10,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 94 transitions, 688 flow [2024-11-09 10:51:10,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 10:51:10,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-09 10:51:10,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 196 transitions. [2024-11-09 10:51:10,448 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43555555555555553 [2024-11-09 10:51:10,448 INFO L175 Difference]: Start difference. First operand has 72 places, 64 transitions, 367 flow. Second operand 9 states and 196 transitions. [2024-11-09 10:51:10,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 94 transitions, 688 flow [2024-11-09 10:51:10,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 94 transitions, 667 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-09 10:51:10,474 INFO L231 Difference]: Finished difference. Result has 73 places, 75 transitions, 505 flow [2024-11-09 10:51:10,474 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=505, PETRI_PLACES=73, PETRI_TRANSITIONS=75} [2024-11-09 10:51:10,474 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 24 predicate places. [2024-11-09 10:51:10,474 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 75 transitions, 505 flow [2024-11-09 10:51:10,475 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 20.0) internal successors, (320), 16 states have internal predecessors, (320), 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 10:51:10,475 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:51:10,475 INFO L204 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1] [2024-11-09 10:51:10,489 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 10:51:10,678 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:51:10,679 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:51:10,680 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:51:10,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1719527885, now seen corresponding path program 1 times [2024-11-09 10:51:10,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:51:10,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773122355] [2024-11-09 10:51:10,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:51:10,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:51:10,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:51:11,001 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:51:11,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:51:11,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773122355] [2024-11-09 10:51:11,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773122355] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:51:11,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264266903] [2024-11-09 10:51:11,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:51:11,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:51:11,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:51:11,004 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 10:51:11,006 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 10:51:11,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:51:11,070 INFO L255 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-09 10:51:11,072 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:51:11,125 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 23 treesize of output 1 [2024-11-09 10:51:11,340 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:51:11,340 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:51:11,831 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 61 treesize of output 55 [2024-11-09 10:51:11,847 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:51:11,847 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 78 treesize of output 68 [2024-11-09 10:51:12,014 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:51:12,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264266903] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:51:12,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:51:12,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2024-11-09 10:51:12,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83127325] [2024-11-09 10:51:12,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:51:12,015 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-09 10:51:12,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:51:12,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-09 10:51:12,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=618, Unknown=0, NotChecked=0, Total=812 [2024-11-09 10:51:12,354 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 50 [2024-11-09 10:51:12,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 75 transitions, 505 flow. Second operand has 29 states, 29 states have (on average 21.448275862068964) internal successors, (622), 29 states have internal predecessors, (622), 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 10:51:12,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:51:12,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 50 [2024-11-09 10:51:12,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:51:13,664 INFO L124 PetriNetUnfolderBase]: 1601/3041 cut-off events. [2024-11-09 10:51:13,664 INFO L125 PetriNetUnfolderBase]: For 5561/5561 co-relation queries the response was YES. [2024-11-09 10:51:13,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9684 conditions, 3041 events. 1601/3041 cut-off events. For 5561/5561 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 18013 event pairs, 114 based on Foata normal form. 7/2965 useless extension candidates. Maximal degree in co-relation 8690. Up to 642 conditions per place. [2024-11-09 10:51:13,681 INFO L140 encePairwiseOnDemand]: 33/50 looper letters, 171 selfloop transitions, 96 changer transitions 74/349 dead transitions. [2024-11-09 10:51:13,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 349 transitions, 2706 flow [2024-11-09 10:51:13,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-09 10:51:13,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-11-09 10:51:13,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 899 transitions. [2024-11-09 10:51:13,684 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5288235294117647 [2024-11-09 10:51:13,684 INFO L175 Difference]: Start difference. First operand has 73 places, 75 transitions, 505 flow. Second operand 34 states and 899 transitions. [2024-11-09 10:51:13,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 349 transitions, 2706 flow [2024-11-09 10:51:13,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 349 transitions, 2568 flow, removed 66 selfloop flow, removed 3 redundant places. [2024-11-09 10:51:13,696 INFO L231 Difference]: Finished difference. Result has 118 places, 152 transitions, 1410 flow [2024-11-09 10:51:13,696 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=475, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=1410, PETRI_PLACES=118, PETRI_TRANSITIONS=152} [2024-11-09 10:51:13,697 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 69 predicate places. [2024-11-09 10:51:13,697 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 152 transitions, 1410 flow [2024-11-09 10:51:13,697 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 21.448275862068964) internal successors, (622), 29 states have internal predecessors, (622), 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 10:51:13,697 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:51:13,697 INFO L204 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1] [2024-11-09 10:51:13,712 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 10:51:13,901 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 10:51:13,902 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:51:13,902 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:51:13,903 INFO L85 PathProgramCache]: Analyzing trace with hash -756473919, now seen corresponding path program 1 times [2024-11-09 10:51:13,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:51:13,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604418550] [2024-11-09 10:51:13,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:51:13,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:51:13,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:51:13,944 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 10:51:13,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:51:13,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604418550] [2024-11-09 10:51:13,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604418550] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:51:13,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:51:13,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:51:13,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893106019] [2024-11-09 10:51:13,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:51:13,946 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:51:13,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:51:13,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:51:13,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:51:13,950 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 50 [2024-11-09 10:51:13,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 152 transitions, 1410 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 10:51:13,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:51:13,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 50 [2024-11-09 10:51:13,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:51:14,221 INFO L124 PetriNetUnfolderBase]: 1385/2518 cut-off events. [2024-11-09 10:51:14,221 INFO L125 PetriNetUnfolderBase]: For 9454/9454 co-relation queries the response was YES. [2024-11-09 10:51:14,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10044 conditions, 2518 events. 1385/2518 cut-off events. For 9454/9454 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 12419 event pairs, 752 based on Foata normal form. 4/2522 useless extension candidates. Maximal degree in co-relation 9996. Up to 2314 conditions per place. [2024-11-09 10:51:14,242 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 117 selfloop transitions, 2 changer transitions 7/134 dead transitions. [2024-11-09 10:51:14,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 134 transitions, 1435 flow [2024-11-09 10:51:14,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:51:14,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:51:14,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 100 transitions. [2024-11-09 10:51:14,243 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-11-09 10:51:14,243 INFO L175 Difference]: Start difference. First operand has 118 places, 152 transitions, 1410 flow. Second operand 3 states and 100 transitions. [2024-11-09 10:51:14,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 134 transitions, 1435 flow [2024-11-09 10:51:14,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 134 transitions, 1337 flow, removed 40 selfloop flow, removed 15 redundant places. [2024-11-09 10:51:14,269 INFO L231 Difference]: Finished difference. Result has 89 places, 121 transitions, 1019 flow [2024-11-09 10:51:14,269 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1023, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1019, PETRI_PLACES=89, PETRI_TRANSITIONS=121} [2024-11-09 10:51:14,270 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 40 predicate places. [2024-11-09 10:51:14,270 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 121 transitions, 1019 flow [2024-11-09 10:51:14,270 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 10:51:14,270 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:51:14,270 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 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 10:51:14,270 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-09 10:51:14,270 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:51:14,270 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:51:14,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1310547575, now seen corresponding path program 2 times [2024-11-09 10:51:14,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:51:14,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941716758] [2024-11-09 10:51:14,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:51:14,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:51:14,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:51:14,384 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 10:51:14,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:51:14,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941716758] [2024-11-09 10:51:14,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941716758] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:51:14,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:51:14,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 10:51:14,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540021093] [2024-11-09 10:51:14,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:51:14,385 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:51:14,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:51:14,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:51:14,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:51:14,389 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-11-09 10:51:14,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 121 transitions, 1019 flow. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 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 10:51:14,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:51:14,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-11-09 10:51:14,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:51:14,764 INFO L124 PetriNetUnfolderBase]: 1778/3215 cut-off events. [2024-11-09 10:51:14,764 INFO L125 PetriNetUnfolderBase]: For 7976/7976 co-relation queries the response was YES. [2024-11-09 10:51:14,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11185 conditions, 3215 events. 1778/3215 cut-off events. For 7976/7976 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 16078 event pairs, 365 based on Foata normal form. 158/3373 useless extension candidates. Maximal degree in co-relation 11123. Up to 1638 conditions per place. [2024-11-09 10:51:14,785 INFO L140 encePairwiseOnDemand]: 46/50 looper letters, 140 selfloop transitions, 4 changer transitions 2/153 dead transitions. [2024-11-09 10:51:14,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 153 transitions, 1561 flow [2024-11-09 10:51:14,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:51:14,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:51:14,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 118 transitions. [2024-11-09 10:51:14,786 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.59 [2024-11-09 10:51:14,786 INFO L175 Difference]: Start difference. First operand has 89 places, 121 transitions, 1019 flow. Second operand 4 states and 118 transitions. [2024-11-09 10:51:14,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 153 transitions, 1561 flow [2024-11-09 10:51:14,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 153 transitions, 1541 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-11-09 10:51:14,805 INFO L231 Difference]: Finished difference. Result has 88 places, 115 transitions, 949 flow [2024-11-09 10:51:14,806 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=937, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=949, PETRI_PLACES=88, PETRI_TRANSITIONS=115} [2024-11-09 10:51:14,806 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 39 predicate places. [2024-11-09 10:51:14,806 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 115 transitions, 949 flow [2024-11-09 10:51:14,807 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 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 10:51:14,807 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:51:14,807 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:51:14,807 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-09 10:51:14,807 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:51:14,807 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:51:14,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1385051409, now seen corresponding path program 1 times [2024-11-09 10:51:14,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:51:14,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867831653] [2024-11-09 10:51:14,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:51:14,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:51:14,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:51:15,855 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:51:15,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:51:15,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867831653] [2024-11-09 10:51:15,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867831653] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:51:15,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018007054] [2024-11-09 10:51:15,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:51:15,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:51:15,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:51:15,857 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 10:51:15,859 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 10:51:15,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:51:15,927 INFO L255 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-09 10:51:15,929 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:51:16,011 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 23 treesize of output 1 [2024-11-09 10:51:16,491 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:51:16,492 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:51:17,347 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 117 treesize of output 105 [2024-11-09 10:51:17,369 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:51:17,370 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 237 treesize of output 208 [2024-11-09 10:51:17,974 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:51:17,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018007054] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:51:17,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:51:17,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 46 [2024-11-09 10:51:17,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006160826] [2024-11-09 10:51:17,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:51:17,975 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-11-09 10:51:17,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:51:17,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-11-09 10:51:17,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=1854, Unknown=0, NotChecked=0, Total=2162 [2024-11-09 10:51:19,134 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 50 [2024-11-09 10:51:19,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 115 transitions, 949 flow. Second operand has 47 states, 47 states have (on average 21.21276595744681) internal successors, (997), 47 states have internal predecessors, (997), 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 10:51:19,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:51:19,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 50 [2024-11-09 10:51:19,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:51:42,963 INFO L124 PetriNetUnfolderBase]: 13975/27117 cut-off events. [2024-11-09 10:51:42,963 INFO L125 PetriNetUnfolderBase]: For 68644/68644 co-relation queries the response was YES. [2024-11-09 10:51:43,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93201 conditions, 27117 events. 13975/27117 cut-off events. For 68644/68644 co-relation queries the response was YES. Maximal size of possible extension queue 632. Compared 226567 event pairs, 807 based on Foata normal form. 284/27310 useless extension candidates. Maximal degree in co-relation 83100. Up to 4648 conditions per place. [2024-11-09 10:51:43,152 INFO L140 encePairwiseOnDemand]: 33/50 looper letters, 1106 selfloop transitions, 1554 changer transitions 400/3070 dead transitions. [2024-11-09 10:51:43,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 3070 transitions, 25896 flow [2024-11-09 10:51:43,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 350 states. [2024-11-09 10:51:43,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 350 states. [2024-11-09 10:51:43,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 8901 transitions. [2024-11-09 10:51:43,170 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5086285714285714 [2024-11-09 10:51:43,170 INFO L175 Difference]: Start difference. First operand has 88 places, 115 transitions, 949 flow. Second operand 350 states and 8901 transitions. [2024-11-09 10:51:43,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 3070 transitions, 25896 flow [2024-11-09 10:51:43,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 3070 transitions, 25868 flow, removed 13 selfloop flow, removed 1 redundant places. [2024-11-09 10:51:43,353 INFO L231 Difference]: Finished difference. Result has 515 places, 1779 transitions, 19616 flow [2024-11-09 10:51:43,353 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=942, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=350, PETRI_FLOW=19616, PETRI_PLACES=515, PETRI_TRANSITIONS=1779} [2024-11-09 10:51:43,354 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 466 predicate places. [2024-11-09 10:51:43,354 INFO L471 AbstractCegarLoop]: Abstraction has has 515 places, 1779 transitions, 19616 flow [2024-11-09 10:51:43,355 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 21.21276595744681) internal successors, (997), 47 states have internal predecessors, (997), 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 10:51:43,356 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:51:43,356 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:51:43,369 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 10:51:43,556 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-09 10:51:43,557 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:51:43,557 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:51:43,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1610367021, now seen corresponding path program 2 times [2024-11-09 10:51:43,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:51:43,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060518075] [2024-11-09 10:51:43,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:51:43,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:51:43,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:51:44,492 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:51:44,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:51:44,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060518075] [2024-11-09 10:51:44,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060518075] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:51:44,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230222187] [2024-11-09 10:51:44,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:51:44,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:51:44,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:51:44,495 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 10:51:44,496 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 10:51:44,569 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 10:51:44,569 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:51:44,571 INFO L255 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-09 10:51:44,572 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:51:44,684 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 10:51:45,269 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:51:45,269 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:51:46,150 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 117 treesize of output 105 [2024-11-09 10:51:46,182 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:51:46,182 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 229 treesize of output 200 [2024-11-09 10:51:46,808 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:51:46,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230222187] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:51:46,808 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:51:46,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 46 [2024-11-09 10:51:46,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760783077] [2024-11-09 10:51:46,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:51:46,809 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-11-09 10:51:46,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:51:46,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-11-09 10:51:46,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=1871, Unknown=0, NotChecked=0, Total=2162 [2024-11-09 10:51:47,801 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 50 [2024-11-09 10:51:47,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 515 places, 1779 transitions, 19616 flow. Second operand has 47 states, 47 states have (on average 21.23404255319149) internal successors, (998), 47 states have internal predecessors, (998), 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 10:51:47,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:51:47,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 50 [2024-11-09 10:51:47,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:52:20,160 INFO L124 PetriNetUnfolderBase]: 18524/35479 cut-off events. [2024-11-09 10:52:20,161 INFO L125 PetriNetUnfolderBase]: For 1201656/1201664 co-relation queries the response was YES. [2024-11-09 10:52:20,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186200 conditions, 35479 events. 18524/35479 cut-off events. For 1201656/1201664 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 276829 event pairs, 1200 based on Foata normal form. 572/35922 useless extension candidates. Maximal degree in co-relation 186044. Up to 6299 conditions per place. [2024-11-09 10:52:20,939 INFO L140 encePairwiseOnDemand]: 33/50 looper letters, 1243 selfloop transitions, 2697 changer transitions 324/4274 dead transitions. [2024-11-09 10:52:20,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 659 places, 4274 transitions, 51539 flow [2024-11-09 10:52:20,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 330 states. [2024-11-09 10:52:20,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 330 states. [2024-11-09 10:52:20,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 8188 transitions. [2024-11-09 10:52:20,953 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49624242424242426 [2024-11-09 10:52:20,953 INFO L175 Difference]: Start difference. First operand has 515 places, 1779 transitions, 19616 flow. Second operand 330 states and 8188 transitions. [2024-11-09 10:52:20,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 659 places, 4274 transitions, 51539 flow [2024-11-09 10:52:23,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 592 places, 4274 transitions, 41699 flow, removed 4213 selfloop flow, removed 67 redundant places. [2024-11-09 10:52:23,788 INFO L231 Difference]: Finished difference. Result has 716 places, 3015 transitions, 35286 flow [2024-11-09 10:52:23,788 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=5419, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=460, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=330, PETRI_FLOW=35286, PETRI_PLACES=716, PETRI_TRANSITIONS=3015} [2024-11-09 10:52:23,789 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 667 predicate places. [2024-11-09 10:52:23,789 INFO L471 AbstractCegarLoop]: Abstraction has has 716 places, 3015 transitions, 35286 flow [2024-11-09 10:52:23,789 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 21.23404255319149) internal successors, (998), 47 states have internal predecessors, (998), 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 10:52:23,789 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:52:23,790 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:52:23,803 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 10:52:23,993 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:52:23,994 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:52:23,994 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:52:23,994 INFO L85 PathProgramCache]: Analyzing trace with hash -2126616383, now seen corresponding path program 3 times [2024-11-09 10:52:23,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:52:23,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531970314] [2024-11-09 10:52:23,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:52:23,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:52:24,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:52:24,960 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:52:24,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:52:24,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531970314] [2024-11-09 10:52:24,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531970314] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:52:24,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559839404] [2024-11-09 10:52:24,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 10:52:24,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:52:24,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:52:24,962 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 10:52:24,963 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 10:52:25,022 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 10:52:25,022 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:52:25,023 INFO L255 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-09 10:52:25,026 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:52:25,117 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 10:52:25,622 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:52:25,622 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:52:26,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 78 treesize of output 70 [2024-11-09 10:52:26,578 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 10:52:26,601 INFO L349 Elim1Store]: treesize reduction 5, result has 86.5 percent of original size [2024-11-09 10:52:26,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 215 treesize of output 208