./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-more-buffer-mult3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 023d838f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/popl20-more-buffer-mult3.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 7888761977ccc49b1a75199021e374591654c6a4364e63bfc6c86e1c7bb7d64b --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-023d838-m [2024-11-10 18:19:45,949 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-10 18:19:46,025 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-10 18:19:46,032 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-10 18:19:46,033 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-10 18:19:46,060 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-10 18:19:46,060 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-10 18:19:46,061 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-10 18:19:46,062 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-10 18:19:46,063 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-10 18:19:46,063 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-10 18:19:46,063 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-10 18:19:46,064 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-10 18:19:46,064 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-10 18:19:46,066 INFO L153 SettingsManager]: * Use SBE=true [2024-11-10 18:19:46,066 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-10 18:19:46,067 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-10 18:19:46,067 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-10 18:19:46,067 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-10 18:19:46,067 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-10 18:19:46,068 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-10 18:19:46,072 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-10 18:19:46,073 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-10 18:19:46,073 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-10 18:19:46,073 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-10 18:19:46,073 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-10 18:19:46,073 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-10 18:19:46,074 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-10 18:19:46,074 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-10 18:19:46,074 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-10 18:19:46,074 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-10 18:19:46,074 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-10 18:19:46,075 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-10 18:19:46,075 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 18:19:46,075 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-10 18:19:46,075 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-10 18:19:46,075 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-10 18:19:46,076 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-10 18:19:46,076 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-10 18:19:46,076 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-10 18:19:46,076 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-10 18:19:46,078 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-10 18:19:46,078 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7888761977ccc49b1a75199021e374591654c6a4364e63bfc6c86e1c7bb7d64b [2024-11-10 18:19:46,360 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-10 18:19:46,386 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-10 18:19:46,390 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-10 18:19:46,392 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-10 18:19:46,392 INFO L274 PluginConnector]: CDTParser initialized [2024-11-10 18:19:46,394 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-buffer-mult3.wvr.c [2024-11-10 18:19:48,088 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-10 18:19:48,307 INFO L384 CDTParser]: Found 1 translation units. [2024-11-10 18:19:48,308 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-buffer-mult3.wvr.c [2024-11-10 18:19:48,332 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e605abb8/8e56cdce616945278d92b2e25423423e/FLAG11d3fbb56 [2024-11-10 18:19:48,354 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e605abb8/8e56cdce616945278d92b2e25423423e [2024-11-10 18:19:48,359 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-10 18:19:48,361 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-10 18:19:48,362 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-10 18:19:48,363 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-10 18:19:48,370 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-10 18:19:48,371 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 06:19:48" (1/1) ... [2024-11-10 18:19:48,372 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@248426e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:19:48, skipping insertion in model container [2024-11-10 18:19:48,372 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 06:19:48" (1/1) ... [2024-11-10 18:19:48,402 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-10 18:19:48,650 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-10 18:19:48,654 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 18:19:48,664 INFO L200 MainTranslator]: Completed pre-run [2024-11-10 18:19:48,692 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 18:19:48,737 INFO L204 MainTranslator]: Completed translation [2024-11-10 18:19:48,738 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:19:48 WrapperNode [2024-11-10 18:19:48,738 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-10 18:19:48,743 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-10 18:19:48,743 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-10 18:19:48,743 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-10 18:19:48,755 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:19:48" (1/1) ... [2024-11-10 18:19:48,767 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:19:48" (1/1) ... [2024-11-10 18:19:48,798 INFO L138 Inliner]: procedures = 26, calls = 61, calls flagged for inlining = 19, calls inlined = 23, statements flattened = 292 [2024-11-10 18:19:48,830 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-10 18:19:48,831 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-10 18:19:48,831 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-10 18:19:48,831 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-10 18:19:48,854 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:19:48" (1/1) ... [2024-11-10 18:19:48,854 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:19:48" (1/1) ... [2024-11-10 18:19:48,862 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:19:48" (1/1) ... [2024-11-10 18:19:48,890 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-10 18:19:48,894 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:19:48" (1/1) ... [2024-11-10 18:19:48,894 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:19:48" (1/1) ... [2024-11-10 18:19:48,908 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:19:48" (1/1) ... [2024-11-10 18:19:48,908 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:19:48" (1/1) ... [2024-11-10 18:19:48,917 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:19:48" (1/1) ... [2024-11-10 18:19:48,919 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:19:48" (1/1) ... [2024-11-10 18:19:48,922 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-10 18:19:48,923 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-10 18:19:48,924 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-10 18:19:48,924 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-10 18:19:48,924 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:19:48" (1/1) ... [2024-11-10 18:19:48,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 18:19:48,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:19:48,973 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) [2024-11-10 18:19:48,976 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 [2024-11-10 18:19:49,020 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-10 18:19:49,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-10 18:19:49,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-10 18:19:49,020 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-10 18:19:49,021 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-10 18:19:49,021 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-10 18:19:49,021 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-10 18:19:49,021 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-10 18:19:49,021 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-10 18:19:49,021 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-10 18:19:49,021 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-10 18:19:49,022 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-11-10 18:19:49,022 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-11-10 18:19:49,022 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-10 18:19:49,022 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-10 18:19:49,022 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-10 18:19:49,022 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-10 18:19:49,023 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-10 18:19:49,023 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-10 18:19:49,023 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-10 18:19:49,025 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-10 18:19:49,144 INFO L256 CfgBuilder]: Building ICFG [2024-11-10 18:19:49,146 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-10 18:19:49,646 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-10 18:19:49,647 INFO L307 CfgBuilder]: Performing block encoding [2024-11-10 18:19:50,042 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-10 18:19:50,042 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-10 18:19:50,043 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 06:19:50 BoogieIcfgContainer [2024-11-10 18:19:50,043 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-10 18:19:50,045 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-10 18:19:50,047 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-10 18:19:50,051 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-10 18:19:50,056 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 06:19:48" (1/3) ... [2024-11-10 18:19:50,057 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c09b7a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 06:19:50, skipping insertion in model container [2024-11-10 18:19:50,057 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:19:48" (2/3) ... [2024-11-10 18:19:50,058 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c09b7a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 06:19:50, skipping insertion in model container [2024-11-10 18:19:50,058 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 06:19:50" (3/3) ... [2024-11-10 18:19:50,059 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-mult3.wvr.c [2024-11-10 18:19:50,080 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-10 18:19:50,081 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2024-11-10 18:19:50,081 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-10 18:19:50,172 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-10 18:19:50,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 84 transitions, 196 flow [2024-11-10 18:19:50,294 INFO L124 PetriNetUnfolderBase]: 12/80 cut-off events. [2024-11-10 18:19:50,295 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-10 18:19:50,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97 conditions, 80 events. 12/80 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 188 event pairs, 0 based on Foata normal form. 0/54 useless extension candidates. Maximal degree in co-relation 64. Up to 2 conditions per place. [2024-11-10 18:19:50,304 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 84 transitions, 196 flow [2024-11-10 18:19:50,309 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 80 places, 79 transitions, 182 flow [2024-11-10 18:19:50,320 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 18:19:50,331 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;@5c334c0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 18:19:50,331 INFO L334 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2024-11-10 18:19:50,335 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 18:19:50,335 INFO L124 PetriNetUnfolderBase]: 2/7 cut-off events. [2024-11-10 18:19:50,335 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 18:19:50,336 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:19:50,336 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-10 18:19:50,337 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-10 18:19:50,345 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:19:50,346 INFO L85 PathProgramCache]: Analyzing trace with hash 24635938, now seen corresponding path program 1 times [2024-11-10 18:19:50,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:19:50,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497333986] [2024-11-10 18:19:50,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:50,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:19:50,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:50,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:19:50,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:19:50,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497333986] [2024-11-10 18:19:50,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497333986] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:19:50,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:19:50,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-10 18:19:50,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804179315] [2024-11-10 18:19:50,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:19:50,697 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:19:50,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:19:50,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:19:50,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:19:50,753 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 84 [2024-11-10 18:19:50,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 79 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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) [2024-11-10 18:19:50,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:19:50,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 84 [2024-11-10 18:19:50,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:19:53,478 INFO L124 PetriNetUnfolderBase]: 15159/20731 cut-off events. [2024-11-10 18:19:53,478 INFO L125 PetriNetUnfolderBase]: For 459/459 co-relation queries the response was YES. [2024-11-10 18:19:53,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41422 conditions, 20731 events. 15159/20731 cut-off events. For 459/459 co-relation queries the response was YES. Maximal size of possible extension queue 1484. Compared 138997 event pairs, 12544 based on Foata normal form. 2616/16537 useless extension candidates. Maximal degree in co-relation 38836. Up to 19683 conditions per place. [2024-11-10 18:19:53,686 INFO L140 encePairwiseOnDemand]: 73/84 looper letters, 44 selfloop transitions, 2 changer transitions 0/69 dead transitions. [2024-11-10 18:19:53,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 69 transitions, 254 flow [2024-11-10 18:19:53,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:19:53,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:19:53,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 139 transitions. [2024-11-10 18:19:53,699 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5515873015873016 [2024-11-10 18:19:53,700 INFO L175 Difference]: Start difference. First operand has 80 places, 79 transitions, 182 flow. Second operand 3 states and 139 transitions. [2024-11-10 18:19:53,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 69 transitions, 254 flow [2024-11-10 18:19:53,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 69 transitions, 238 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-10 18:19:53,816 INFO L231 Difference]: Finished difference. Result has 70 places, 69 transitions, 150 flow [2024-11-10 18:19:53,819 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=70, PETRI_TRANSITIONS=69} [2024-11-10 18:19:53,822 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, -10 predicate places. [2024-11-10 18:19:53,822 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 69 transitions, 150 flow [2024-11-10 18:19:53,823 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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) [2024-11-10 18:19:53,823 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:19:53,823 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-10 18:19:53,823 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-10 18:19:53,823 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-10 18:19:53,824 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:19:53,824 INFO L85 PathProgramCache]: Analyzing trace with hash 24635939, now seen corresponding path program 1 times [2024-11-10 18:19:53,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:19:53,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893307788] [2024-11-10 18:19:53,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:53,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:19:53,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:54,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:19:54,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:19:54,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893307788] [2024-11-10 18:19:54,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893307788] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:19:54,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:19:54,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:19:54,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479304639] [2024-11-10 18:19:54,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:19:54,087 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:19:54,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:19:54,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:19:54,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 18:19:54,122 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 84 [2024-11-10 18:19:54,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 69 transitions, 150 flow. Second operand has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 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) [2024-11-10 18:19:54,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:19:54,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 84 [2024-11-10 18:19:54,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:19:56,098 INFO L124 PetriNetUnfolderBase]: 15160/20736 cut-off events. [2024-11-10 18:19:56,099 INFO L125 PetriNetUnfolderBase]: For 37/37 co-relation queries the response was YES. [2024-11-10 18:19:56,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40785 conditions, 20736 events. 15160/20736 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 1484. Compared 139061 event pairs, 12544 based on Foata normal form. 0/13924 useless extension candidates. Maximal degree in co-relation 40750. Up to 19692 conditions per place. [2024-11-10 18:19:56,370 INFO L140 encePairwiseOnDemand]: 79/84 looper letters, 47 selfloop transitions, 4 changer transitions 0/72 dead transitions. [2024-11-10 18:19:56,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 72 transitions, 258 flow [2024-11-10 18:19:56,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 18:19:56,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 18:19:56,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 164 transitions. [2024-11-10 18:19:56,373 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2024-11-10 18:19:56,373 INFO L175 Difference]: Start difference. First operand has 70 places, 69 transitions, 150 flow. Second operand 4 states and 164 transitions. [2024-11-10 18:19:56,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 72 transitions, 258 flow [2024-11-10 18:19:56,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 72 transitions, 254 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:19:56,376 INFO L231 Difference]: Finished difference. Result has 73 places, 72 transitions, 173 flow [2024-11-10 18:19:56,377 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=173, PETRI_PLACES=73, PETRI_TRANSITIONS=72} [2024-11-10 18:19:56,378 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, -7 predicate places. [2024-11-10 18:19:56,378 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 72 transitions, 173 flow [2024-11-10 18:19:56,378 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 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) [2024-11-10 18:19:56,378 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:19:56,378 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-11-10 18:19:56,379 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-10 18:19:56,379 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-10 18:19:56,381 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:19:56,381 INFO L85 PathProgramCache]: Analyzing trace with hash -509375519, now seen corresponding path program 1 times [2024-11-10 18:19:56,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:19:56,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895569137] [2024-11-10 18:19:56,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:56,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:19:56,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:56,598 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:19:56,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:19:56,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895569137] [2024-11-10 18:19:56,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895569137] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:19:56,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532970543] [2024-11-10 18:19:56,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:56,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:19:56,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:19:56,602 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) [2024-11-10 18:19:56,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-10 18:19:56,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:56,684 INFO L255 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-10 18:19:56,689 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:19:56,750 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 [2024-11-10 18:19:56,965 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:19:56,965 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:19:57,121 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:19:57,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532970543] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:19:57,122 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:19:57,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-10 18:19:57,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770008125] [2024-11-10 18:19:57,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:19:57,124 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-10 18:19:57,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:19:57,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-10 18:19:57,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-10 18:19:57,221 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 84 [2024-11-10 18:19:57,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 72 transitions, 173 flow. Second operand has 11 states, 11 states have (on average 27.363636363636363) internal successors, (301), 11 states have internal predecessors, (301), 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) [2024-11-10 18:19:57,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:19:57,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 84 [2024-11-10 18:19:57,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:19:59,426 INFO L124 PetriNetUnfolderBase]: 15160/20735 cut-off events. [2024-11-10 18:19:59,426 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2024-11-10 18:19:59,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40796 conditions, 20735 events. 15160/20735 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 1484. Compared 138740 event pairs, 12544 based on Foata normal form. 0/13923 useless extension candidates. Maximal degree in co-relation 40771. Up to 19688 conditions per place. [2024-11-10 18:19:59,582 INFO L140 encePairwiseOnDemand]: 77/84 looper letters, 44 selfloop transitions, 9 changer transitions 0/72 dead transitions. [2024-11-10 18:19:59,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 72 transitions, 277 flow [2024-11-10 18:19:59,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-10 18:19:59,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-10 18:19:59,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 236 transitions. [2024-11-10 18:19:59,585 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-11-10 18:19:59,585 INFO L175 Difference]: Start difference. First operand has 73 places, 72 transitions, 173 flow. Second operand 7 states and 236 transitions. [2024-11-10 18:19:59,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 72 transitions, 277 flow [2024-11-10 18:19:59,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 72 transitions, 274 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 18:19:59,587 INFO L231 Difference]: Finished difference. Result has 77 places, 71 transitions, 184 flow [2024-11-10 18:19:59,587 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=184, PETRI_PLACES=77, PETRI_TRANSITIONS=71} [2024-11-10 18:19:59,588 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, -3 predicate places. [2024-11-10 18:19:59,588 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 71 transitions, 184 flow [2024-11-10 18:19:59,589 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 27.363636363636363) internal successors, (301), 11 states have internal predecessors, (301), 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) [2024-11-10 18:19:59,589 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:19:59,589 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:19:59,608 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-10 18:19:59,789 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 [2024-11-10 18:19:59,790 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-10 18:19:59,790 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:19:59,790 INFO L85 PathProgramCache]: Analyzing trace with hash -509181780, now seen corresponding path program 1 times [2024-11-10 18:19:59,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:19:59,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168408046] [2024-11-10 18:19:59,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:59,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:19:59,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:59,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:19:59,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:19:59,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168408046] [2024-11-10 18:20:00,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168408046] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:20:00,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:20:00,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 18:20:00,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660538298] [2024-11-10 18:20:00,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:20:00,001 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 18:20:00,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:20:00,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 18:20:00,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-10 18:20:00,038 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 84 [2024-11-10 18:20:00,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 71 transitions, 184 flow. Second operand has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 states have internal predecessors, (144), 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) [2024-11-10 18:20:00,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:20:00,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 84 [2024-11-10 18:20:00,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:20:02,015 INFO L124 PetriNetUnfolderBase]: 15161/20740 cut-off events. [2024-11-10 18:20:02,016 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2024-11-10 18:20:02,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40810 conditions, 20740 events. 15161/20740 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 1484. Compared 139016 event pairs, 12544 based on Foata normal form. 0/13929 useless extension candidates. Maximal degree in co-relation 40782. Up to 19690 conditions per place. [2024-11-10 18:20:02,194 INFO L140 encePairwiseOnDemand]: 76/84 looper letters, 46 selfloop transitions, 7 changer transitions 0/74 dead transitions. [2024-11-10 18:20:02,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 74 transitions, 298 flow [2024-11-10 18:20:02,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 18:20:02,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 18:20:02,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 194 transitions. [2024-11-10 18:20:02,197 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46190476190476193 [2024-11-10 18:20:02,197 INFO L175 Difference]: Start difference. First operand has 77 places, 71 transitions, 184 flow. Second operand 5 states and 194 transitions. [2024-11-10 18:20:02,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 74 transitions, 298 flow [2024-11-10 18:20:02,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 74 transitions, 269 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-11-10 18:20:02,203 INFO L231 Difference]: Finished difference. Result has 76 places, 74 transitions, 194 flow [2024-11-10 18:20:02,204 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=194, PETRI_PLACES=76, PETRI_TRANSITIONS=74} [2024-11-10 18:20:02,205 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, -4 predicate places. [2024-11-10 18:20:02,206 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 74 transitions, 194 flow [2024-11-10 18:20:02,207 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 states have internal predecessors, (144), 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) [2024-11-10 18:20:02,207 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:20:02,207 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2024-11-10 18:20:02,207 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-10 18:20:02,207 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-10 18:20:02,207 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:20:02,208 INFO L85 PathProgramCache]: Analyzing trace with hash 790869833, now seen corresponding path program 1 times [2024-11-10 18:20:02,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:20:02,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012158542] [2024-11-10 18:20:02,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:02,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:20:02,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:02,493 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:20:02,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:20:02,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012158542] [2024-11-10 18:20:02,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012158542] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:20:02,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796025487] [2024-11-10 18:20:02,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:02,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:20:02,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:20:02,497 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) [2024-11-10 18:20:02,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-10 18:20:02,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:02,576 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-10 18:20:02,579 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:20:02,605 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 [2024-11-10 18:20:02,806 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:20:02,806 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:20:03,022 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:20:03,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796025487] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:20:03,024 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:20:03,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-10 18:20:03,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019282466] [2024-11-10 18:20:03,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:20:03,025 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-10 18:20:03,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:20:03,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-10 18:20:03,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-10 18:20:03,090 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 84 [2024-11-10 18:20:03,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 74 transitions, 194 flow. Second operand has 13 states, 13 states have (on average 27.46153846153846) internal successors, (357), 13 states have internal predecessors, (357), 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) [2024-11-10 18:20:03,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:20:03,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 84 [2024-11-10 18:20:03,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:20:05,170 INFO L124 PetriNetUnfolderBase]: 15163/20749 cut-off events. [2024-11-10 18:20:05,171 INFO L125 PetriNetUnfolderBase]: For 55/55 co-relation queries the response was YES. [2024-11-10 18:20:05,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40834 conditions, 20749 events. 15163/20749 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 1484. Compared 138808 event pairs, 12544 based on Foata normal form. 0/13939 useless extension candidates. Maximal degree in co-relation 40766. Up to 19684 conditions per place. [2024-11-10 18:20:05,361 INFO L140 encePairwiseOnDemand]: 76/84 looper letters, 46 selfloop transitions, 18 changer transitions 0/83 dead transitions. [2024-11-10 18:20:05,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 83 transitions, 350 flow [2024-11-10 18:20:05,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-10 18:20:05,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-10 18:20:05,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 300 transitions. [2024-11-10 18:20:05,363 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-11-10 18:20:05,364 INFO L175 Difference]: Start difference. First operand has 76 places, 74 transitions, 194 flow. Second operand 9 states and 300 transitions. [2024-11-10 18:20:05,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 83 transitions, 350 flow [2024-11-10 18:20:05,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 83 transitions, 344 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:20:05,366 INFO L231 Difference]: Finished difference. Result has 81 places, 79 transitions, 244 flow [2024-11-10 18:20:05,367 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=244, PETRI_PLACES=81, PETRI_TRANSITIONS=79} [2024-11-10 18:20:05,369 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, 1 predicate places. [2024-11-10 18:20:05,369 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 79 transitions, 244 flow [2024-11-10 18:20:05,370 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 27.46153846153846) internal successors, (357), 13 states have internal predecessors, (357), 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) [2024-11-10 18:20:05,370 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:20:05,371 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:20:05,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-10 18:20:05,571 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:20:05,572 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-10 18:20:05,572 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:20:05,572 INFO L85 PathProgramCache]: Analyzing trace with hash 2128515766, now seen corresponding path program 1 times [2024-11-10 18:20:05,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:20:05,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092202423] [2024-11-10 18:20:05,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:05,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:20:05,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:05,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:20:05,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:20:05,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092202423] [2024-11-10 18:20:05,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092202423] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:20:05,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:20:05,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:20:05,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845290379] [2024-11-10 18:20:05,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:20:05,678 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:20:05,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:20:05,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:20:05,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 18:20:05,688 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 84 [2024-11-10 18:20:05,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 79 transitions, 244 flow. Second operand has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:20:05,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:20:05,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 84 [2024-11-10 18:20:05,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:20:07,723 INFO L124 PetriNetUnfolderBase]: 18048/25178 cut-off events. [2024-11-10 18:20:07,723 INFO L125 PetriNetUnfolderBase]: For 106/106 co-relation queries the response was YES. [2024-11-10 18:20:07,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49362 conditions, 25178 events. 18048/25178 cut-off events. For 106/106 co-relation queries the response was YES. Maximal size of possible extension queue 1622. Compared 174704 event pairs, 15126 based on Foata normal form. 608/18575 useless extension candidates. Maximal degree in co-relation 40929. Up to 19703 conditions per place. [2024-11-10 18:20:07,937 INFO L140 encePairwiseOnDemand]: 74/84 looper letters, 97 selfloop transitions, 4 changer transitions 0/120 dead transitions. [2024-11-10 18:20:07,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 120 transitions, 574 flow [2024-11-10 18:20:07,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 18:20:07,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 18:20:07,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 232 transitions. [2024-11-10 18:20:07,940 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5523809523809524 [2024-11-10 18:20:07,941 INFO L175 Difference]: Start difference. First operand has 81 places, 79 transitions, 244 flow. Second operand 5 states and 232 transitions. [2024-11-10 18:20:07,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 120 transitions, 574 flow [2024-11-10 18:20:07,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 120 transitions, 521 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-11-10 18:20:07,944 INFO L231 Difference]: Finished difference. Result has 82 places, 80 transitions, 239 flow [2024-11-10 18:20:07,945 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=239, PETRI_PLACES=82, PETRI_TRANSITIONS=80} [2024-11-10 18:20:07,945 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, 2 predicate places. [2024-11-10 18:20:07,946 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 80 transitions, 239 flow [2024-11-10 18:20:07,946 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:20:07,946 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:20:07,946 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:20:07,946 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-10 18:20:07,947 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-10 18:20:07,947 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:20:07,947 INFO L85 PathProgramCache]: Analyzing trace with hash -600106234, now seen corresponding path program 1 times [2024-11-10 18:20:07,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:20:07,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810871299] [2024-11-10 18:20:07,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:07,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:20:07,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:08,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:20:08,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:20:08,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810871299] [2024-11-10 18:20:08,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810871299] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:20:08,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:20:08,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 18:20:08,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656313652] [2024-11-10 18:20:08,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:20:08,035 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:20:08,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:20:08,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:20:08,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 18:20:08,048 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 84 [2024-11-10 18:20:08,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 80 transitions, 239 flow. Second operand has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:20:08,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:20:08,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 84 [2024-11-10 18:20:08,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:20:09,534 INFO L124 PetriNetUnfolderBase]: 13245/18550 cut-off events. [2024-11-10 18:20:09,534 INFO L125 PetriNetUnfolderBase]: For 1045/1045 co-relation queries the response was YES. [2024-11-10 18:20:09,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39333 conditions, 18550 events. 13245/18550 cut-off events. For 1045/1045 co-relation queries the response was YES. Maximal size of possible extension queue 1128. Compared 125290 event pairs, 10898 based on Foata normal form. 0/13566 useless extension candidates. Maximal degree in co-relation 33103. Up to 17384 conditions per place. [2024-11-10 18:20:09,819 INFO L140 encePairwiseOnDemand]: 80/84 looper letters, 52 selfloop transitions, 4 changer transitions 0/78 dead transitions. [2024-11-10 18:20:09,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 78 transitions, 347 flow [2024-11-10 18:20:09,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 18:20:09,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 18:20:09,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 158 transitions. [2024-11-10 18:20:09,821 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2024-11-10 18:20:09,821 INFO L175 Difference]: Start difference. First operand has 82 places, 80 transitions, 239 flow. Second operand 4 states and 158 transitions. [2024-11-10 18:20:09,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 78 transitions, 347 flow [2024-11-10 18:20:09,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 78 transitions, 345 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 18:20:09,826 INFO L231 Difference]: Finished difference. Result has 82 places, 78 transitions, 241 flow [2024-11-10 18:20:09,826 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=241, PETRI_PLACES=82, PETRI_TRANSITIONS=78} [2024-11-10 18:20:09,827 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, 2 predicate places. [2024-11-10 18:20:09,827 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 78 transitions, 241 flow [2024-11-10 18:20:09,827 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:20:09,827 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:20:09,827 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:20:09,828 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-10 18:20:09,828 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-10 18:20:09,828 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:20:09,828 INFO L85 PathProgramCache]: Analyzing trace with hash -600106233, now seen corresponding path program 1 times [2024-11-10 18:20:09,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:20:09,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405451242] [2024-11-10 18:20:09,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:09,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:20:09,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:09,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:20:09,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:20:09,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405451242] [2024-11-10 18:20:09,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405451242] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:20:09,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:20:09,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 18:20:09,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213267708] [2024-11-10 18:20:09,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:20:09,947 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:20:09,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:20:09,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:20:09,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 18:20:09,961 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 84 [2024-11-10 18:20:09,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 78 transitions, 241 flow. Second operand has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 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) [2024-11-10 18:20:09,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:20:09,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 84 [2024-11-10 18:20:09,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:20:12,116 INFO L124 PetriNetUnfolderBase]: 16856/24279 cut-off events. [2024-11-10 18:20:12,116 INFO L125 PetriNetUnfolderBase]: For 1365/1365 co-relation queries the response was YES. [2024-11-10 18:20:12,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51303 conditions, 24279 events. 16856/24279 cut-off events. For 1365/1365 co-relation queries the response was YES. Maximal size of possible extension queue 1276. Compared 175293 event pairs, 14179 based on Foata normal form. 581/19196 useless extension candidates. Maximal degree in co-relation 43166. Up to 17407 conditions per place. [2024-11-10 18:20:12,317 INFO L140 encePairwiseOnDemand]: 76/84 looper letters, 84 selfloop transitions, 6 changer transitions 0/109 dead transitions. [2024-11-10 18:20:12,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 109 transitions, 503 flow [2024-11-10 18:20:12,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 18:20:12,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 18:20:12,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 224 transitions. [2024-11-10 18:20:12,318 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-11-10 18:20:12,319 INFO L175 Difference]: Start difference. First operand has 82 places, 78 transitions, 241 flow. Second operand 5 states and 224 transitions. [2024-11-10 18:20:12,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 109 transitions, 503 flow [2024-11-10 18:20:12,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 109 transitions, 498 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:20:12,325 INFO L231 Difference]: Finished difference. Result has 86 places, 79 transitions, 266 flow [2024-11-10 18:20:12,326 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=266, PETRI_PLACES=86, PETRI_TRANSITIONS=79} [2024-11-10 18:20:12,326 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, 6 predicate places. [2024-11-10 18:20:12,326 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 79 transitions, 266 flow [2024-11-10 18:20:12,327 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 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) [2024-11-10 18:20:12,327 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:20:12,327 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:20:12,327 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-10 18:20:12,327 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-10 18:20:12,327 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:20:12,327 INFO L85 PathProgramCache]: Analyzing trace with hash 498730680, now seen corresponding path program 1 times [2024-11-10 18:20:12,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:20:12,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926008371] [2024-11-10 18:20:12,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:12,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:20:12,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:12,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:20:12,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:20:12,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926008371] [2024-11-10 18:20:12,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926008371] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:20:12,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:20:12,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-10 18:20:12,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887209794] [2024-11-10 18:20:12,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:20:12,579 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-10 18:20:12,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:20:12,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-10 18:20:12,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-10 18:20:12,617 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 84 [2024-11-10 18:20:12,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 79 transitions, 266 flow. Second operand has 6 states, 6 states have (on average 27.666666666666668) internal successors, (166), 6 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:20:12,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:20:12,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 84 [2024-11-10 18:20:12,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:20:14,204 INFO L124 PetriNetUnfolderBase]: 12936/18746 cut-off events. [2024-11-10 18:20:14,205 INFO L125 PetriNetUnfolderBase]: For 2177/2177 co-relation queries the response was YES. [2024-11-10 18:20:14,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40931 conditions, 18746 events. 12936/18746 cut-off events. For 2177/2177 co-relation queries the response was YES. Maximal size of possible extension queue 973. Compared 132293 event pairs, 10753 based on Foata normal form. 0/14703 useless extension candidates. Maximal degree in co-relation 32266. Up to 17299 conditions per place. [2024-11-10 18:20:14,404 INFO L140 encePairwiseOnDemand]: 80/84 looper letters, 54 selfloop transitions, 4 changer transitions 0/77 dead transitions. [2024-11-10 18:20:14,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 77 transitions, 374 flow [2024-11-10 18:20:14,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 18:20:14,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 18:20:14,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 150 transitions. [2024-11-10 18:20:14,405 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-11-10 18:20:14,405 INFO L175 Difference]: Start difference. First operand has 86 places, 79 transitions, 266 flow. Second operand 4 states and 150 transitions. [2024-11-10 18:20:14,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 77 transitions, 374 flow [2024-11-10 18:20:14,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 77 transitions, 370 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 18:20:14,411 INFO L231 Difference]: Finished difference. Result has 86 places, 77 transitions, 262 flow [2024-11-10 18:20:14,411 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=262, PETRI_PLACES=86, PETRI_TRANSITIONS=77} [2024-11-10 18:20:14,412 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, 6 predicate places. [2024-11-10 18:20:14,412 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 77 transitions, 262 flow [2024-11-10 18:20:14,412 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.666666666666668) internal successors, (166), 6 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:20:14,413 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:20:14,413 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:20:14,413 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-10 18:20:14,413 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-10 18:20:14,413 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:20:14,413 INFO L85 PathProgramCache]: Analyzing trace with hash 498730679, now seen corresponding path program 1 times [2024-11-10 18:20:14,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:20:14,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905850472] [2024-11-10 18:20:14,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:14,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:20:14,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:14,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:20:14,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:20:14,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905850472] [2024-11-10 18:20:14,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905850472] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:20:14,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:20:14,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:20:14,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994646914] [2024-11-10 18:20:14,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:20:14,692 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:20:14,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:20:14,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:20:14,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 18:20:14,701 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 84 [2024-11-10 18:20:14,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 77 transitions, 262 flow. Second operand has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:20:14,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:20:14,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 84 [2024-11-10 18:20:14,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:20:16,157 INFO L124 PetriNetUnfolderBase]: 9642/14095 cut-off events. [2024-11-10 18:20:16,157 INFO L125 PetriNetUnfolderBase]: For 1763/1763 co-relation queries the response was YES. [2024-11-10 18:20:16,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30024 conditions, 14095 events. 9642/14095 cut-off events. For 1763/1763 co-relation queries the response was YES. Maximal size of possible extension queue 729. Compared 96912 event pairs, 7905 based on Foata normal form. 0/11831 useless extension candidates. Maximal degree in co-relation 21363. Up to 12955 conditions per place. [2024-11-10 18:20:16,259 INFO L140 encePairwiseOnDemand]: 79/84 looper letters, 45 selfloop transitions, 7 changer transitions 0/75 dead transitions. [2024-11-10 18:20:16,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 75 transitions, 358 flow [2024-11-10 18:20:16,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 18:20:16,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 18:20:16,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 182 transitions. [2024-11-10 18:20:16,260 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-11-10 18:20:16,260 INFO L175 Difference]: Start difference. First operand has 86 places, 77 transitions, 262 flow. Second operand 5 states and 182 transitions. [2024-11-10 18:20:16,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 75 transitions, 358 flow [2024-11-10 18:20:16,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 75 transitions, 353 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:20:16,265 INFO L231 Difference]: Finished difference. Result has 86 places, 75 transitions, 263 flow [2024-11-10 18:20:16,265 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=263, PETRI_PLACES=86, PETRI_TRANSITIONS=75} [2024-11-10 18:20:16,265 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, 6 predicate places. [2024-11-10 18:20:16,266 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 75 transitions, 263 flow [2024-11-10 18:20:16,266 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:20:16,266 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:20:16,266 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:20:16,266 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-10 18:20:16,266 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-10 18:20:16,266 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:20:16,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1172675420, now seen corresponding path program 1 times [2024-11-10 18:20:16,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:20:16,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102067269] [2024-11-10 18:20:16,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:16,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:20:16,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:16,457 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:20:16,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:20:16,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102067269] [2024-11-10 18:20:16,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102067269] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:20:16,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778063459] [2024-11-10 18:20:16,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:16,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:20:16,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:20:16,463 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) [2024-11-10 18:20:16,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-10 18:20:16,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:16,552 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-10 18:20:16,553 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:20:16,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:20:16,668 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-10 18:20:16,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778063459] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:20:16,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-10 18:20:16,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2024-11-10 18:20:16,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65200144] [2024-11-10 18:20:16,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:20:16,669 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-10 18:20:16,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:20:16,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-10 18:20:16,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-10 18:20:16,710 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 84 [2024-11-10 18:20:16,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 75 transitions, 263 flow. Second operand has 6 states, 6 states have (on average 30.0) internal successors, (180), 6 states have internal predecessors, (180), 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) [2024-11-10 18:20:16,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:20:16,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 84 [2024-11-10 18:20:16,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:20:17,599 INFO L124 PetriNetUnfolderBase]: 7325/10917 cut-off events. [2024-11-10 18:20:17,600 INFO L125 PetriNetUnfolderBase]: For 1438/1438 co-relation queries the response was YES. [2024-11-10 18:20:17,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22638 conditions, 10917 events. 7325/10917 cut-off events. For 1438/1438 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 74100 event pairs, 5929 based on Foata normal form. 0/9621 useless extension candidates. Maximal degree in co-relation 16099. Up to 9905 conditions per place. [2024-11-10 18:20:17,689 INFO L140 encePairwiseOnDemand]: 79/84 looper letters, 46 selfloop transitions, 8 changer transitions 0/73 dead transitions. [2024-11-10 18:20:17,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 73 transitions, 363 flow [2024-11-10 18:20:17,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 18:20:17,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 18:20:17,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 182 transitions. [2024-11-10 18:20:17,691 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-11-10 18:20:17,691 INFO L175 Difference]: Start difference. First operand has 86 places, 75 transitions, 263 flow. Second operand 5 states and 182 transitions. [2024-11-10 18:20:17,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 73 transitions, 363 flow [2024-11-10 18:20:17,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 73 transitions, 352 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-10 18:20:17,694 INFO L231 Difference]: Finished difference. Result has 85 places, 73 transitions, 260 flow [2024-11-10 18:20:17,694 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=260, PETRI_PLACES=85, PETRI_TRANSITIONS=73} [2024-11-10 18:20:17,695 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, 5 predicate places. [2024-11-10 18:20:17,695 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 73 transitions, 260 flow [2024-11-10 18:20:17,695 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.0) internal successors, (180), 6 states have internal predecessors, (180), 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) [2024-11-10 18:20:17,695 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:20:17,695 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:20:17,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-10 18:20:17,899 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 [2024-11-10 18:20:17,900 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-10 18:20:17,900 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:20:17,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1805693101, now seen corresponding path program 1 times [2024-11-10 18:20:17,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:20:17,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182665215] [2024-11-10 18:20:17,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:17,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:20:17,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:17,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:20:17,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:20:17,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182665215] [2024-11-10 18:20:17,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182665215] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:20:17,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:20:17,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:20:17,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579504493] [2024-11-10 18:20:17,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:20:17,969 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:20:17,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:20:17,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:20:17,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:20:17,970 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 84 [2024-11-10 18:20:17,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 73 transitions, 260 flow. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 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) [2024-11-10 18:20:17,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:20:17,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 84 [2024-11-10 18:20:17,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:20:19,107 INFO L124 PetriNetUnfolderBase]: 10490/16552 cut-off events. [2024-11-10 18:20:19,107 INFO L125 PetriNetUnfolderBase]: For 2450/2450 co-relation queries the response was YES. [2024-11-10 18:20:19,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33484 conditions, 16552 events. 10490/16552 cut-off events. For 2450/2450 co-relation queries the response was YES. Maximal size of possible extension queue 799. Compared 123526 event pairs, 4096 based on Foata normal form. 4/14896 useless extension candidates. Maximal degree in co-relation 24829. Up to 7677 conditions per place. [2024-11-10 18:20:19,459 INFO L140 encePairwiseOnDemand]: 80/84 looper letters, 69 selfloop transitions, 3 changer transitions 1/96 dead transitions. [2024-11-10 18:20:19,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 96 transitions, 465 flow [2024-11-10 18:20:19,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:20:19,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:20:19,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 152 transitions. [2024-11-10 18:20:19,461 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6031746031746031 [2024-11-10 18:20:19,461 INFO L175 Difference]: Start difference. First operand has 85 places, 73 transitions, 260 flow. Second operand 3 states and 152 transitions. [2024-11-10 18:20:19,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 96 transitions, 465 flow [2024-11-10 18:20:19,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 96 transitions, 452 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-10 18:20:19,464 INFO L231 Difference]: Finished difference. Result has 85 places, 75 transitions, 270 flow [2024-11-10 18:20:19,464 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=270, PETRI_PLACES=85, PETRI_TRANSITIONS=75} [2024-11-10 18:20:19,465 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, 5 predicate places. [2024-11-10 18:20:19,465 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 75 transitions, 270 flow [2024-11-10 18:20:19,465 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 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) [2024-11-10 18:20:19,465 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:20:19,465 INFO L204 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:20:19,465 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-10 18:20:19,466 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-10 18:20:19,466 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:20:19,466 INFO L85 PathProgramCache]: Analyzing trace with hash -2071437505, now seen corresponding path program 1 times [2024-11-10 18:20:19,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:20:19,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286691807] [2024-11-10 18:20:19,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:19,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:20:19,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:19,555 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:20:19,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:20:19,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286691807] [2024-11-10 18:20:19,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286691807] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:20:19,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:20:19,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:20:19,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485174053] [2024-11-10 18:20:19,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:20:19,556 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:20:19,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:20:19,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:20:19,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:20:19,557 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 84 [2024-11-10 18:20:19,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 75 transitions, 270 flow. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 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) [2024-11-10 18:20:19,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:20:19,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 84 [2024-11-10 18:20:19,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:20:21,547 INFO L124 PetriNetUnfolderBase]: 12822/20536 cut-off events. [2024-11-10 18:20:21,547 INFO L125 PetriNetUnfolderBase]: For 6837/6837 co-relation queries the response was YES. [2024-11-10 18:20:21,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43391 conditions, 20536 events. 12822/20536 cut-off events. For 6837/6837 co-relation queries the response was YES. Maximal size of possible extension queue 895. Compared 160048 event pairs, 6225 based on Foata normal form. 360/18973 useless extension candidates. Maximal degree in co-relation 34423. Up to 8793 conditions per place. [2024-11-10 18:20:21,782 INFO L140 encePairwiseOnDemand]: 81/84 looper letters, 77 selfloop transitions, 2 changer transitions 0/102 dead transitions. [2024-11-10 18:20:21,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 102 transitions, 504 flow [2024-11-10 18:20:21,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:20:21,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:20:21,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 155 transitions. [2024-11-10 18:20:21,784 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6150793650793651 [2024-11-10 18:20:21,784 INFO L175 Difference]: Start difference. First operand has 85 places, 75 transitions, 270 flow. Second operand 3 states and 155 transitions. [2024-11-10 18:20:21,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 102 transitions, 504 flow [2024-11-10 18:20:21,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 102 transitions, 500 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 18:20:21,792 INFO L231 Difference]: Finished difference. Result has 87 places, 76 transitions, 281 flow [2024-11-10 18:20:21,793 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=281, PETRI_PLACES=87, PETRI_TRANSITIONS=76} [2024-11-10 18:20:21,793 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, 7 predicate places. [2024-11-10 18:20:21,793 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 76 transitions, 281 flow [2024-11-10 18:20:21,794 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 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) [2024-11-10 18:20:21,794 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:20:21,794 INFO L204 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:20:21,794 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-10 18:20:21,794 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-10 18:20:21,794 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:20:21,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1326318290, now seen corresponding path program 1 times [2024-11-10 18:20:21,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:20:21,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724622625] [2024-11-10 18:20:21,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:21,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:20:21,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:21,875 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:20:21,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:20:21,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724622625] [2024-11-10 18:20:21,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724622625] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:20:21,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:20:21,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:20:21,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349767519] [2024-11-10 18:20:21,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:20:21,877 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:20:21,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:20:21,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:20:21,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:20:21,878 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 84 [2024-11-10 18:20:21,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 76 transitions, 281 flow. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 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) [2024-11-10 18:20:21,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:20:21,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 84 [2024-11-10 18:20:21,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:20:23,982 INFO L124 PetriNetUnfolderBase]: 15698/25542 cut-off events. [2024-11-10 18:20:23,982 INFO L125 PetriNetUnfolderBase]: For 10544/10604 co-relation queries the response was YES. [2024-11-10 18:20:24,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54743 conditions, 25542 events. 15698/25542 cut-off events. For 10544/10604 co-relation queries the response was YES. Maximal size of possible extension queue 993. Compared 205991 event pairs, 7591 based on Foata normal form. 281/23722 useless extension candidates. Maximal degree in co-relation 44316. Up to 10675 conditions per place. [2024-11-10 18:20:24,315 INFO L140 encePairwiseOnDemand]: 81/84 looper letters, 77 selfloop transitions, 2 changer transitions 0/102 dead transitions. [2024-11-10 18:20:24,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 102 transitions, 520 flow [2024-11-10 18:20:24,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:20:24,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:20:24,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 153 transitions. [2024-11-10 18:20:24,317 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-11-10 18:20:24,317 INFO L175 Difference]: Start difference. First operand has 87 places, 76 transitions, 281 flow. Second operand 3 states and 153 transitions. [2024-11-10 18:20:24,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 102 transitions, 520 flow [2024-11-10 18:20:24,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 102 transitions, 517 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 18:20:24,330 INFO L231 Difference]: Finished difference. Result has 89 places, 77 transitions, 293 flow [2024-11-10 18:20:24,330 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=293, PETRI_PLACES=89, PETRI_TRANSITIONS=77} [2024-11-10 18:20:24,331 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, 9 predicate places. [2024-11-10 18:20:24,331 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 77 transitions, 293 flow [2024-11-10 18:20:24,331 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 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) [2024-11-10 18:20:24,331 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:20:24,331 INFO L204 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:20:24,331 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-10 18:20:24,332 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-10 18:20:24,332 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:20:24,332 INFO L85 PathProgramCache]: Analyzing trace with hash 331185191, now seen corresponding path program 1 times [2024-11-10 18:20:24,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:20:24,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521101317] [2024-11-10 18:20:24,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:24,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:20:24,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:24,638 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 18:20:24,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:20:24,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521101317] [2024-11-10 18:20:24,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521101317] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:20:24,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:20:24,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-10 18:20:24,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90349188] [2024-11-10 18:20:24,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:20:24,640 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-10 18:20:24,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:20:24,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-10 18:20:24,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-10 18:20:24,658 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 84 [2024-11-10 18:20:24,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 77 transitions, 293 flow. Second operand has 6 states, 6 states have (on average 33.5) internal successors, (201), 6 states have internal predecessors, (201), 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) [2024-11-10 18:20:24,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:20:24,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 84 [2024-11-10 18:20:24,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:20:28,909 INFO L124 PetriNetUnfolderBase]: 28169/43430 cut-off events. [2024-11-10 18:20:28,909 INFO L125 PetriNetUnfolderBase]: For 18700/18700 co-relation queries the response was YES. [2024-11-10 18:20:29,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97833 conditions, 43430 events. 28169/43430 cut-off events. For 18700/18700 co-relation queries the response was YES. Maximal size of possible extension queue 1663. Compared 342094 event pairs, 2426 based on Foata normal form. 948/43377 useless extension candidates. Maximal degree in co-relation 79759. Up to 19552 conditions per place. [2024-11-10 18:20:29,584 INFO L140 encePairwiseOnDemand]: 75/84 looper letters, 164 selfloop transitions, 16 changer transitions 7/208 dead transitions. [2024-11-10 18:20:29,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 208 transitions, 1065 flow [2024-11-10 18:20:29,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-10 18:20:29,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-10 18:20:29,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 416 transitions. [2024-11-10 18:20:29,586 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5502645502645502 [2024-11-10 18:20:29,586 INFO L175 Difference]: Start difference. First operand has 89 places, 77 transitions, 293 flow. Second operand 9 states and 416 transitions. [2024-11-10 18:20:29,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 208 transitions, 1065 flow [2024-11-10 18:20:29,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 208 transitions, 1062 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 18:20:29,602 INFO L231 Difference]: Finished difference. Result has 103 places, 93 transitions, 427 flow [2024-11-10 18:20:29,602 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=427, PETRI_PLACES=103, PETRI_TRANSITIONS=93} [2024-11-10 18:20:29,602 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, 23 predicate places. [2024-11-10 18:20:29,603 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 93 transitions, 427 flow [2024-11-10 18:20:29,603 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 33.5) internal successors, (201), 6 states have internal predecessors, (201), 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) [2024-11-10 18:20:29,603 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:20:29,603 INFO L204 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:20:29,603 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-10 18:20:29,603 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-10 18:20:29,604 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:20:29,604 INFO L85 PathProgramCache]: Analyzing trace with hash 970791929, now seen corresponding path program 2 times [2024-11-10 18:20:29,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:20:29,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823514396] [2024-11-10 18:20:29,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:29,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:20:29,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:29,975 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 18:20:29,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:20:29,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823514396] [2024-11-10 18:20:29,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823514396] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:20:29,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:20:29,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-10 18:20:29,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787798257] [2024-11-10 18:20:29,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:20:29,978 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-10 18:20:29,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:20:29,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-10 18:20:29,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-10 18:20:29,988 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 84 [2024-11-10 18:20:29,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 93 transitions, 427 flow. Second operand has 6 states, 6 states have (on average 33.5) internal successors, (201), 6 states have internal predecessors, (201), 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) [2024-11-10 18:20:29,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:20:29,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 84 [2024-11-10 18:20:29,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand