./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-more-buffer-series3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8fc3dc66 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/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_1.6.800.v20240513-1750.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-series3.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 c031a4ce44fce05276ee0c322906dbff86776176e55e116d257d2b83e85a253c --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-17 14:29:20,994 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-17 14:29:21,059 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-03-17 14:29:21,063 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-17 14:29:21,063 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-17 14:29:21,077 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-17 14:29:21,078 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-17 14:29:21,078 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-17 14:29:21,079 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-17 14:29:21,079 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-17 14:29:21,079 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-17 14:29:21,080 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-17 14:29:21,080 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-17 14:29:21,080 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-17 14:29:21,080 INFO L153 SettingsManager]: * Use SBE=true [2025-03-17 14:29:21,080 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-17 14:29:21,081 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-17 14:29:21,081 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-17 14:29:21,081 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-17 14:29:21,081 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-17 14:29:21,081 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-17 14:29:21,081 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-17 14:29:21,081 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-17 14:29:21,081 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-17 14:29:21,081 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-17 14:29:21,081 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-17 14:29:21,081 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-17 14:29:21,081 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-17 14:29:21,081 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-17 14:29:21,081 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-17 14:29:21,081 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-17 14:29:21,081 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-17 14:29:21,081 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-17 14:29:21,081 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 14:29:21,081 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-17 14:29:21,082 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-17 14:29:21,082 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-17 14:29:21,082 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-17 14:29:21,082 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-17 14:29:21,082 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-17 14:29:21,082 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-17 14:29:21,082 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-17 14:29:21,082 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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 -> c031a4ce44fce05276ee0c322906dbff86776176e55e116d257d2b83e85a253c [2025-03-17 14:29:21,326 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-17 14:29:21,333 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-17 14:29:21,334 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-17 14:29:21,338 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-17 14:29:21,338 INFO L274 PluginConnector]: CDTParser initialized [2025-03-17 14:29:21,339 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-buffer-series3.wvr.c [2025-03-17 14:29:22,536 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f49f1556b/c0ddeb4cbcce49d3a8b0b77ecc352896/FLAG564030434 [2025-03-17 14:29:22,773 INFO L384 CDTParser]: Found 1 translation units. [2025-03-17 14:29:22,774 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-buffer-series3.wvr.c [2025-03-17 14:29:22,781 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f49f1556b/c0ddeb4cbcce49d3a8b0b77ecc352896/FLAG564030434 [2025-03-17 14:29:22,798 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f49f1556b/c0ddeb4cbcce49d3a8b0b77ecc352896 [2025-03-17 14:29:22,800 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-17 14:29:22,801 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-17 14:29:22,802 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-17 14:29:22,803 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-17 14:29:22,807 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-17 14:29:22,807 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 02:29:22" (1/1) ... [2025-03-17 14:29:22,808 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4448f301 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:29:22, skipping insertion in model container [2025-03-17 14:29:22,808 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 02:29:22" (1/1) ... [2025-03-17 14:29:22,827 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-17 14:29:22,981 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-17 14:29:22,986 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 14:29:22,999 INFO L200 MainTranslator]: Completed pre-run [2025-03-17 14:29:23,033 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 14:29:23,046 INFO L204 MainTranslator]: Completed translation [2025-03-17 14:29:23,047 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:29:23 WrapperNode [2025-03-17 14:29:23,047 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-17 14:29:23,048 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-17 14:29:23,048 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-17 14:29:23,049 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-17 14:29:23,054 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:29:23" (1/1) ... [2025-03-17 14:29:23,064 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:29:23" (1/1) ... [2025-03-17 14:29:23,093 INFO L138 Inliner]: procedures = 26, calls = 68, calls flagged for inlining = 23, calls inlined = 29, statements flattened = 321 [2025-03-17 14:29:23,093 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-17 14:29:23,097 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-17 14:29:23,097 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-17 14:29:23,097 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-17 14:29:23,105 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:29:23" (1/1) ... [2025-03-17 14:29:23,106 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:29:23" (1/1) ... [2025-03-17 14:29:23,109 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:29:23" (1/1) ... [2025-03-17 14:29:23,134 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2025-03-17 14:29:23,134 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:29:23" (1/1) ... [2025-03-17 14:29:23,134 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:29:23" (1/1) ... [2025-03-17 14:29:23,141 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:29:23" (1/1) ... [2025-03-17 14:29:23,142 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:29:23" (1/1) ... [2025-03-17 14:29:23,143 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:29:23" (1/1) ... [2025-03-17 14:29:23,144 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:29:23" (1/1) ... [2025-03-17 14:29:23,145 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-17 14:29:23,146 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-17 14:29:23,146 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-17 14:29:23,146 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-17 14:29:23,147 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:29:23" (1/1) ... [2025-03-17 14:29:23,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 14:29:23,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:29:23,184 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) [2025-03-17 14:29:23,186 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 [2025-03-17 14:29:23,206 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-17 14:29:23,206 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-17 14:29:23,206 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-17 14:29:23,207 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-17 14:29:23,207 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-17 14:29:23,208 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-17 14:29:23,208 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-17 14:29:23,208 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-17 14:29:23,208 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-17 14:29:23,208 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-03-17 14:29:23,208 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-03-17 14:29:23,208 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2025-03-17 14:29:23,208 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2025-03-17 14:29:23,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-17 14:29:23,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-17 14:29:23,208 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-03-17 14:29:23,209 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-03-17 14:29:23,209 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-17 14:29:23,209 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-17 14:29:23,209 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-17 14:29:23,210 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-17 14:29:23,312 INFO L256 CfgBuilder]: Building ICFG [2025-03-17 14:29:23,313 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-17 14:29:23,810 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-17 14:29:23,810 INFO L307 CfgBuilder]: Performing block encoding [2025-03-17 14:29:24,126 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-17 14:29:24,126 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-17 14:29:24,126 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 02:29:24 BoogieIcfgContainer [2025-03-17 14:29:24,126 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-17 14:29:24,128 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-17 14:29:24,128 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-17 14:29:24,132 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-17 14:29:24,132 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 02:29:22" (1/3) ... [2025-03-17 14:29:24,133 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52720f51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 02:29:24, skipping insertion in model container [2025-03-17 14:29:24,133 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:29:23" (2/3) ... [2025-03-17 14:29:24,134 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52720f51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 02:29:24, skipping insertion in model container [2025-03-17 14:29:24,135 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 02:29:24" (3/3) ... [2025-03-17 14:29:24,135 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-series3.wvr.c [2025-03-17 14:29:24,149 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-17 14:29:24,150 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-buffer-series3.wvr.c that has 5 procedures, 71 locations, 1 initial locations, 7 loop locations, and 22 error locations. [2025-03-17 14:29:24,150 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-17 14:29:24,221 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2025-03-17 14:29:24,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 77 transitions, 182 flow [2025-03-17 14:29:24,290 INFO L124 PetriNetUnfolderBase]: 7/73 cut-off events. [2025-03-17 14:29:24,292 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-03-17 14:29:24,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 73 events. 7/73 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 207 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 60. Up to 2 conditions per place. [2025-03-17 14:29:24,295 INFO L82 GeneralOperation]: Start removeDead. Operand has 83 places, 77 transitions, 182 flow [2025-03-17 14:29:24,297 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 78 places, 72 transitions, 168 flow [2025-03-17 14:29:24,304 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-17 14:29:24,312 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;@7b9652f2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-17 14:29:24,312 INFO L334 AbstractCegarLoop]: Starting to check reachability of 40 error locations. [2025-03-17 14:29:24,315 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-17 14:29:24,315 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-03-17 14:29:24,315 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-17 14:29:24,315 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:29:24,315 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-17 14:29:24,316 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-03-17 14:29:24,319 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:29:24,319 INFO L85 PathProgramCache]: Analyzing trace with hash 922100, now seen corresponding path program 1 times [2025-03-17 14:29:24,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:29:24,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984348338] [2025-03-17 14:29:24,326 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:29:24,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:29:24,378 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-17 14:29:24,401 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-17 14:29:24,402 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:29:24,402 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:29:24,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:29:24,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:29:24,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984348338] [2025-03-17 14:29:24,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984348338] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:29:24,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:29:24,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-03-17 14:29:24,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669127815] [2025-03-17 14:29:24,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:29:24,527 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 14:29:24,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:29:24,546 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 14:29:24,547 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 14:29:24,560 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 77 [2025-03-17 14:29:24,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 72 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2025-03-17 14:29:24,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:29:24,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 77 [2025-03-17 14:29:24,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:29:27,000 INFO L124 PetriNetUnfolderBase]: 24724/32935 cut-off events. [2025-03-17 14:29:27,001 INFO L125 PetriNetUnfolderBase]: For 718/718 co-relation queries the response was YES. [2025-03-17 14:29:27,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66545 conditions, 32935 events. 24724/32935 cut-off events. For 718/718 co-relation queries the response was YES. Maximal size of possible extension queue 1815. Compared 203797 event pairs, 20908 based on Foata normal form. 1/21452 useless extension candidates. Maximal degree in co-relation 63308. Up to 32075 conditions per place. [2025-03-17 14:29:27,275 INFO L140 encePairwiseOnDemand]: 69/77 looper letters, 51 selfloop transitions, 2 changer transitions 0/65 dead transitions. [2025-03-17 14:29:27,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 65 transitions, 260 flow [2025-03-17 14:29:27,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 14:29:27,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 14:29:27,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 110 transitions. [2025-03-17 14:29:27,289 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2025-03-17 14:29:27,290 INFO L175 Difference]: Start difference. First operand has 78 places, 72 transitions, 168 flow. Second operand 3 states and 110 transitions. [2025-03-17 14:29:27,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 65 transitions, 260 flow [2025-03-17 14:29:27,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 65 transitions, 244 flow, removed 0 selfloop flow, removed 8 redundant places. [2025-03-17 14:29:27,361 INFO L231 Difference]: Finished difference. Result has 65 places, 65 transitions, 142 flow [2025-03-17 14:29:27,363 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=65, PETRI_TRANSITIONS=65} [2025-03-17 14:29:27,367 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, -13 predicate places. [2025-03-17 14:29:27,368 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 65 transitions, 142 flow [2025-03-17 14:29:27,368 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2025-03-17 14:29:27,368 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:29:27,368 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-17 14:29:27,369 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-17 14:29:27,369 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-03-17 14:29:27,369 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:29:27,370 INFO L85 PathProgramCache]: Analyzing trace with hash 922101, now seen corresponding path program 1 times [2025-03-17 14:29:27,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:29:27,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897981410] [2025-03-17 14:29:27,371 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:29:27,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:29:27,382 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-17 14:29:27,410 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-17 14:29:27,413 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:29:27,414 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:29:27,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:29:27,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:29:27,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897981410] [2025-03-17 14:29:27,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897981410] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:29:27,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:29:27,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 14:29:27,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296094067] [2025-03-17 14:29:27,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:29:27,652 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:29:27,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:29:27,652 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:29:27,652 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:29:27,679 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 77 [2025-03-17 14:29:27,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 65 transitions, 142 flow. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 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) [2025-03-17 14:29:27,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:29:27,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 77 [2025-03-17 14:29:27,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:29:29,496 INFO L124 PetriNetUnfolderBase]: 24725/32938 cut-off events. [2025-03-17 14:29:29,496 INFO L125 PetriNetUnfolderBase]: For 99/99 co-relation queries the response was YES. [2025-03-17 14:29:29,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65609 conditions, 32938 events. 24725/32938 cut-off events. For 99/99 co-relation queries the response was YES. Maximal size of possible extension queue 1815. Compared 203837 event pairs, 20908 based on Foata normal form. 0/21451 useless extension candidates. Maximal degree in co-relation 65572. Up to 32088 conditions per place. [2025-03-17 14:29:29,666 INFO L140 encePairwiseOnDemand]: 72/77 looper letters, 55 selfloop transitions, 4 changer transitions 0/68 dead transitions. [2025-03-17 14:29:29,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 68 transitions, 266 flow [2025-03-17 14:29:29,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:29:29,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:29:29,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 128 transitions. [2025-03-17 14:29:29,667 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4155844155844156 [2025-03-17 14:29:29,667 INFO L175 Difference]: Start difference. First operand has 65 places, 65 transitions, 142 flow. Second operand 4 states and 128 transitions. [2025-03-17 14:29:29,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 68 transitions, 266 flow [2025-03-17 14:29:29,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 68 transitions, 262 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:29:29,669 INFO L231 Difference]: Finished difference. Result has 68 places, 68 transitions, 165 flow [2025-03-17 14:29:29,670 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=165, PETRI_PLACES=68, PETRI_TRANSITIONS=68} [2025-03-17 14:29:29,672 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, -10 predicate places. [2025-03-17 14:29:29,672 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 68 transitions, 165 flow [2025-03-17 14:29:29,672 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 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) [2025-03-17 14:29:29,672 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:29:29,672 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2025-03-17 14:29:29,672 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-17 14:29:29,672 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-03-17 14:29:29,672 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:29:29,673 INFO L85 PathProgramCache]: Analyzing trace with hash 28588476, now seen corresponding path program 1 times [2025-03-17 14:29:29,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:29:29,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120108746] [2025-03-17 14:29:29,673 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:29:29,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:29:29,683 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-03-17 14:29:29,701 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-03-17 14:29:29,704 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:29:29,705 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:29:29,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:29:29,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:29:29,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120108746] [2025-03-17 14:29:29,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120108746] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:29:29,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:29:29,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 14:29:29,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942844572] [2025-03-17 14:29:29,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:29:29,916 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:29:29,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:29:29,917 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:29:29,917 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-17 14:29:29,934 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 77 [2025-03-17 14:29:29,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 68 transitions, 165 flow. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 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) [2025-03-17 14:29:29,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:29:29,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 77 [2025-03-17 14:29:29,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:29:31,788 INFO L124 PetriNetUnfolderBase]: 24726/32941 cut-off events. [2025-03-17 14:29:31,788 INFO L125 PetriNetUnfolderBase]: For 99/99 co-relation queries the response was YES. [2025-03-17 14:29:31,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65626 conditions, 32941 events. 24726/32941 cut-off events. For 99/99 co-relation queries the response was YES. Maximal size of possible extension queue 1815. Compared 203647 event pairs, 20908 based on Foata normal form. 0/21453 useless extension candidates. Maximal degree in co-relation 65601. Up to 32087 conditions per place. [2025-03-17 14:29:31,953 INFO L140 encePairwiseOnDemand]: 69/77 looper letters, 55 selfloop transitions, 7 changer transitions 0/71 dead transitions. [2025-03-17 14:29:31,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 71 transitions, 295 flow [2025-03-17 14:29:31,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:29:31,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:29:31,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 148 transitions. [2025-03-17 14:29:31,955 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38441558441558443 [2025-03-17 14:29:31,955 INFO L175 Difference]: Start difference. First operand has 68 places, 68 transitions, 165 flow. Second operand 5 states and 148 transitions. [2025-03-17 14:29:31,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 71 transitions, 295 flow [2025-03-17 14:29:31,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 71 transitions, 292 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 14:29:31,957 INFO L231 Difference]: Finished difference. Result has 73 places, 71 transitions, 199 flow [2025-03-17 14:29:31,957 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=199, PETRI_PLACES=73, PETRI_TRANSITIONS=71} [2025-03-17 14:29:31,957 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, -5 predicate places. [2025-03-17 14:29:31,957 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 71 transitions, 199 flow [2025-03-17 14:29:31,957 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 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) [2025-03-17 14:29:31,957 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:29:31,957 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2025-03-17 14:29:31,958 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-17 14:29:31,958 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-03-17 14:29:31,958 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:29:31,958 INFO L85 PathProgramCache]: Analyzing trace with hash 886168393, now seen corresponding path program 1 times [2025-03-17 14:29:31,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:29:31,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132867255] [2025-03-17 14:29:31,958 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:29:31,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:29:31,966 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-03-17 14:29:31,977 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-03-17 14:29:31,977 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:29:31,977 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:29:32,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:29:32,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:29:32,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132867255] [2025-03-17 14:29:32,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132867255] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:29:32,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061487854] [2025-03-17 14:29:32,172 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:29:32,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:29:32,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:29:32,176 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) [2025-03-17 14:29:32,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-17 14:29:32,227 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-03-17 14:29:32,237 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-03-17 14:29:32,237 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:29:32,237 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:29:32,243 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-17 14:29:32,246 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:29:32,291 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 [2025-03-17 14:29:32,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:29:32,461 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:29:32,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:29:32,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061487854] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:29:32,565 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:29:32,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2025-03-17 14:29:32,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814029216] [2025-03-17 14:29:32,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:29:32,566 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-17 14:29:32,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:29:32,567 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-17 14:29:32,568 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2025-03-17 14:29:32,642 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 77 [2025-03-17 14:29:32,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 71 transitions, 199 flow. Second operand has 11 states, 11 states have (on average 18.363636363636363) internal successors, (202), 11 states have internal predecessors, (202), 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) [2025-03-17 14:29:32,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:29:32,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 77 [2025-03-17 14:29:32,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:29:34,402 INFO L124 PetriNetUnfolderBase]: 24726/32940 cut-off events. [2025-03-17 14:29:34,402 INFO L125 PetriNetUnfolderBase]: For 102/102 co-relation queries the response was YES. [2025-03-17 14:29:34,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65639 conditions, 32940 events. 24726/32940 cut-off events. For 102/102 co-relation queries the response was YES. Maximal size of possible extension queue 1818. Compared 203933 event pairs, 20908 based on Foata normal form. 0/21455 useless extension candidates. Maximal degree in co-relation 65611. Up to 32087 conditions per place. [2025-03-17 14:29:34,571 INFO L140 encePairwiseOnDemand]: 72/77 looper letters, 54 selfloop transitions, 7 changer transitions 0/70 dead transitions. [2025-03-17 14:29:34,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 70 transitions, 317 flow [2025-03-17 14:29:34,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 14:29:34,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 14:29:34,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 161 transitions. [2025-03-17 14:29:34,573 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3484848484848485 [2025-03-17 14:29:34,573 INFO L175 Difference]: Start difference. First operand has 73 places, 71 transitions, 199 flow. Second operand 6 states and 161 transitions. [2025-03-17 14:29:34,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 70 transitions, 317 flow [2025-03-17 14:29:34,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 70 transitions, 316 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 14:29:34,574 INFO L231 Difference]: Finished difference. Result has 76 places, 70 transitions, 208 flow [2025-03-17 14:29:34,575 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=208, PETRI_PLACES=76, PETRI_TRANSITIONS=70} [2025-03-17 14:29:34,575 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, -2 predicate places. [2025-03-17 14:29:34,575 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 70 transitions, 208 flow [2025-03-17 14:29:34,575 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 18.363636363636363) internal successors, (202), 11 states have internal predecessors, (202), 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) [2025-03-17 14:29:34,576 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:29:34,576 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2025-03-17 14:29:34,582 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-17 14:29:34,776 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:29:34,776 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-03-17 14:29:34,777 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:29:34,777 INFO L85 PathProgramCache]: Analyzing trace with hash 886243048, now seen corresponding path program 1 times [2025-03-17 14:29:34,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:29:34,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855973633] [2025-03-17 14:29:34,777 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:29:34,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:29:34,783 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-03-17 14:29:34,791 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-03-17 14:29:34,791 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:29:34,791 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:29:34,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:29:34,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:29:34,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855973633] [2025-03-17 14:29:34,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855973633] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:29:34,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:29:34,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 14:29:34,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655446722] [2025-03-17 14:29:34,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:29:34,916 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:29:34,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:29:34,918 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:29:34,918 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-17 14:29:34,951 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 77 [2025-03-17 14:29:34,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 70 transitions, 208 flow. Second operand has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 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) [2025-03-17 14:29:34,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:29:34,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 77 [2025-03-17 14:29:34,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:29:37,248 INFO L124 PetriNetUnfolderBase]: 24727/32943 cut-off events. [2025-03-17 14:29:37,248 INFO L125 PetriNetUnfolderBase]: For 102/102 co-relation queries the response was YES. [2025-03-17 14:29:37,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65652 conditions, 32943 events. 24727/32943 cut-off events. For 102/102 co-relation queries the response was YES. Maximal size of possible extension queue 1818. Compared 204195 event pairs, 20908 based on Foata normal form. 0/21457 useless extension candidates. Maximal degree in co-relation 65619. Up to 32089 conditions per place. [2025-03-17 14:29:37,488 INFO L140 encePairwiseOnDemand]: 68/77 looper letters, 55 selfloop transitions, 9 changer transitions 0/73 dead transitions. [2025-03-17 14:29:37,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 73 transitions, 342 flow [2025-03-17 14:29:37,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:29:37,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:29:37,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 147 transitions. [2025-03-17 14:29:37,489 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38181818181818183 [2025-03-17 14:29:37,489 INFO L175 Difference]: Start difference. First operand has 76 places, 70 transitions, 208 flow. Second operand 5 states and 147 transitions. [2025-03-17 14:29:37,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 73 transitions, 342 flow [2025-03-17 14:29:37,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 73 transitions, 308 flow, removed 3 selfloop flow, removed 8 redundant places. [2025-03-17 14:29:37,765 INFO L231 Difference]: Finished difference. Result has 74 places, 73 transitions, 217 flow [2025-03-17 14:29:37,765 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=217, PETRI_PLACES=74, PETRI_TRANSITIONS=73} [2025-03-17 14:29:37,765 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, -4 predicate places. [2025-03-17 14:29:37,765 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 73 transitions, 217 flow [2025-03-17 14:29:37,765 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 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) [2025-03-17 14:29:37,765 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:29:37,766 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2025-03-17 14:29:37,766 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-17 14:29:37,766 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-03-17 14:29:37,766 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:29:37,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1703751138, now seen corresponding path program 1 times [2025-03-17 14:29:37,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:29:37,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020738020] [2025-03-17 14:29:37,766 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:29:37,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:29:37,774 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-17 14:29:37,784 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-17 14:29:37,785 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:29:37,785 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:29:37,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:29:37,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:29:37,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020738020] [2025-03-17 14:29:37,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020738020] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:29:37,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250176371] [2025-03-17 14:29:37,960 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:29:37,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:29:37,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:29:37,963 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) [2025-03-17 14:29:37,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-17 14:29:38,008 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-17 14:29:38,021 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-17 14:29:38,021 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:29:38,021 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:29:38,022 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-17 14:29:38,023 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:29:38,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-03-17 14:29:38,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:29:38,132 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:29:38,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:29:38,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250176371] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:29:38,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:29:38,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2025-03-17 14:29:38,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822197414] [2025-03-17 14:29:38,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:29:38,250 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-17 14:29:38,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:29:38,250 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-17 14:29:38,250 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2025-03-17 14:29:38,366 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 77 [2025-03-17 14:29:38,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 73 transitions, 217 flow. Second operand has 13 states, 13 states have (on average 18.307692307692307) internal successors, (238), 13 states have internal predecessors, (238), 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) [2025-03-17 14:29:38,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:29:38,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 77 [2025-03-17 14:29:38,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:29:40,051 INFO L124 PetriNetUnfolderBase]: 24727/32942 cut-off events. [2025-03-17 14:29:40,051 INFO L125 PetriNetUnfolderBase]: For 104/104 co-relation queries the response was YES. [2025-03-17 14:29:40,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65650 conditions, 32942 events. 24727/32942 cut-off events. For 104/104 co-relation queries the response was YES. Maximal size of possible extension queue 1815. Compared 203671 event pairs, 20908 based on Foata normal form. 0/21459 useless extension candidates. Maximal degree in co-relation 65608. Up to 32082 conditions per place. [2025-03-17 14:29:40,236 INFO L140 encePairwiseOnDemand]: 69/77 looper letters, 51 selfloop transitions, 12 changer transitions 0/72 dead transitions. [2025-03-17 14:29:40,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 72 transitions, 339 flow [2025-03-17 14:29:40,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-17 14:29:40,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-17 14:29:40,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2025-03-17 14:29:40,237 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3339517625231911 [2025-03-17 14:29:40,237 INFO L175 Difference]: Start difference. First operand has 74 places, 73 transitions, 217 flow. Second operand 7 states and 180 transitions. [2025-03-17 14:29:40,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 72 transitions, 339 flow [2025-03-17 14:29:40,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 72 transitions, 332 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:29:40,239 INFO L231 Difference]: Finished difference. Result has 77 places, 72 transitions, 230 flow [2025-03-17 14:29:40,239 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=230, PETRI_PLACES=77, PETRI_TRANSITIONS=72} [2025-03-17 14:29:40,240 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, -1 predicate places. [2025-03-17 14:29:40,240 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 72 transitions, 230 flow [2025-03-17 14:29:40,240 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 18.307692307692307) internal successors, (238), 13 states have internal predecessors, (238), 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) [2025-03-17 14:29:40,240 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:29:40,240 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2025-03-17 14:29:40,245 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-17 14:29:40,444 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2025-03-17 14:29:40,444 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-03-17 14:29:40,444 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:29:40,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1276072588, now seen corresponding path program 1 times [2025-03-17 14:29:40,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:29:40,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179295614] [2025-03-17 14:29:40,445 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:29:40,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:29:40,451 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-17 14:29:40,457 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-17 14:29:40,459 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:29:40,459 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:29:40,610 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:29:40,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:29:40,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179295614] [2025-03-17 14:29:40,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179295614] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:29:40,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737949044] [2025-03-17 14:29:40,611 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:29:40,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:29:40,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:29:40,613 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) [2025-03-17 14:29:40,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-17 14:29:40,654 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-17 14:29:40,668 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-17 14:29:40,668 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:29:40,668 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:29:40,671 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-17 14:29:40,672 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:29:40,685 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 [2025-03-17 14:29:40,793 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:29:40,794 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:29:40,939 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:29:40,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737949044] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:29:40,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:29:40,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2025-03-17 14:29:40,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476802955] [2025-03-17 14:29:40,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:29:40,940 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-17 14:29:40,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:29:40,941 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-17 14:29:40,941 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2025-03-17 14:29:41,034 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 77 [2025-03-17 14:29:41,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 72 transitions, 230 flow. Second operand has 13 states, 13 states have (on average 18.46153846153846) internal successors, (240), 13 states have internal predecessors, (240), 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) [2025-03-17 14:29:41,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:29:41,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 77 [2025-03-17 14:29:41,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:29:42,546 INFO L124 PetriNetUnfolderBase]: 24727/32941 cut-off events. [2025-03-17 14:29:42,546 INFO L125 PetriNetUnfolderBase]: For 105/105 co-relation queries the response was YES. [2025-03-17 14:29:42,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65655 conditions, 32941 events. 24727/32941 cut-off events. For 105/105 co-relation queries the response was YES. Maximal size of possible extension queue 1818. Compared 204020 event pairs, 20908 based on Foata normal form. 0/21459 useless extension candidates. Maximal degree in co-relation 65610. Up to 32081 conditions per place. [2025-03-17 14:29:42,746 INFO L140 encePairwiseOnDemand]: 68/77 looper letters, 47 selfloop transitions, 15 changer transitions 0/71 dead transitions. [2025-03-17 14:29:42,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 71 transitions, 350 flow [2025-03-17 14:29:42,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-17 14:29:42,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-17 14:29:42,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2025-03-17 14:29:42,747 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3320964749536178 [2025-03-17 14:29:42,747 INFO L175 Difference]: Start difference. First operand has 77 places, 72 transitions, 230 flow. Second operand 7 states and 179 transitions. [2025-03-17 14:29:42,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 71 transitions, 350 flow [2025-03-17 14:29:42,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 71 transitions, 325 flow, removed 3 selfloop flow, removed 5 redundant places. [2025-03-17 14:29:42,749 INFO L231 Difference]: Finished difference. Result has 77 places, 71 transitions, 231 flow [2025-03-17 14:29:42,750 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=231, PETRI_PLACES=77, PETRI_TRANSITIONS=71} [2025-03-17 14:29:42,751 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, -1 predicate places. [2025-03-17 14:29:42,751 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 71 transitions, 231 flow [2025-03-17 14:29:42,751 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 18.46153846153846) internal successors, (240), 13 states have internal predecessors, (240), 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) [2025-03-17 14:29:42,751 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:29:42,751 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:29:42,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-17 14:29:42,952 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:29:42,952 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-03-17 14:29:42,952 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:29:42,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1933913875, now seen corresponding path program 1 times [2025-03-17 14:29:42,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:29:42,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253107391] [2025-03-17 14:29:42,952 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:29:42,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:29:42,958 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-17 14:29:42,963 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-17 14:29:42,963 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:29:42,963 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:29:43,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:29:43,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:29:43,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253107391] [2025-03-17 14:29:43,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253107391] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:29:43,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:29:43,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 14:29:43,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948104780] [2025-03-17 14:29:43,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:29:43,007 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:29:43,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:29:43,008 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:29:43,008 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:29:43,013 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 77 [2025-03-17 14:29:43,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 71 transitions, 231 flow. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 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) [2025-03-17 14:29:43,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:29:43,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 77 [2025-03-17 14:29:43,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:29:44,632 INFO L124 PetriNetUnfolderBase]: 28425/38175 cut-off events. [2025-03-17 14:29:44,632 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2025-03-17 14:29:44,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76114 conditions, 38175 events. 28425/38175 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 1975. Compared 241200 event pairs, 24260 based on Foata normal form. 808/26527 useless extension candidates. Maximal degree in co-relation 65610. Up to 32090 conditions per place. [2025-03-17 14:29:44,826 INFO L140 encePairwiseOnDemand]: 62/77 looper letters, 99 selfloop transitions, 7 changer transitions 0/115 dead transitions. [2025-03-17 14:29:44,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 115 transitions, 585 flow [2025-03-17 14:29:44,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:29:44,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:29:44,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 208 transitions. [2025-03-17 14:29:44,828 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5402597402597402 [2025-03-17 14:29:44,828 INFO L175 Difference]: Start difference. First operand has 77 places, 71 transitions, 231 flow. Second operand 5 states and 208 transitions. [2025-03-17 14:29:44,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 115 transitions, 585 flow [2025-03-17 14:29:44,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 115 transitions, 528 flow, removed 6 selfloop flow, removed 6 redundant places. [2025-03-17 14:29:44,831 INFO L231 Difference]: Finished difference. Result has 77 places, 75 transitions, 259 flow [2025-03-17 14:29:44,831 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=259, PETRI_PLACES=77, PETRI_TRANSITIONS=75} [2025-03-17 14:29:44,832 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, -1 predicate places. [2025-03-17 14:29:44,832 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 75 transitions, 259 flow [2025-03-17 14:29:44,832 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 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) [2025-03-17 14:29:44,832 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:29:44,832 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:29:44,832 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-03-17 14:29:44,832 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-03-17 14:29:44,832 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:29:44,832 INFO L85 PathProgramCache]: Analyzing trace with hash 55528260, now seen corresponding path program 1 times [2025-03-17 14:29:44,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:29:44,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161705667] [2025-03-17 14:29:44,832 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:29:44,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:29:44,839 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-17 14:29:44,851 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-17 14:29:44,852 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:29:44,852 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:29:44,948 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 14:29:44,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:29:44,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161705667] [2025-03-17 14:29:44,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161705667] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:29:44,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:29:44,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-17 14:29:44,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470142105] [2025-03-17 14:29:44,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:29:44,949 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 14:29:44,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:29:44,950 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 14:29:44,950 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-17 14:29:44,961 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 77 [2025-03-17 14:29:44,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 75 transitions, 259 flow. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 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) [2025-03-17 14:29:44,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:29:44,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 77 [2025-03-17 14:29:44,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:29:47,404 INFO L124 PetriNetUnfolderBase]: 44121/59251 cut-off events. [2025-03-17 14:29:47,405 INFO L125 PetriNetUnfolderBase]: For 2508/2508 co-relation queries the response was YES. [2025-03-17 14:29:47,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127686 conditions, 59251 events. 44121/59251 cut-off events. For 2508/2508 co-relation queries the response was YES. Maximal size of possible extension queue 2940. Compared 390986 event pairs, 29928 based on Foata normal form. 0/41231 useless extension candidates. Maximal degree in co-relation 103599. Up to 42185 conditions per place. [2025-03-17 14:29:47,734 INFO L140 encePairwiseOnDemand]: 71/77 looper letters, 122 selfloop transitions, 9 changer transitions 0/139 dead transitions. [2025-03-17 14:29:47,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 139 transitions, 672 flow [2025-03-17 14:29:47,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 14:29:47,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 14:29:47,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 236 transitions. [2025-03-17 14:29:47,736 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5108225108225108 [2025-03-17 14:29:47,736 INFO L175 Difference]: Start difference. First operand has 77 places, 75 transitions, 259 flow. Second operand 6 states and 236 transitions. [2025-03-17 14:29:47,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 139 transitions, 672 flow [2025-03-17 14:29:47,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 139 transitions, 667 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:29:47,752 INFO L231 Difference]: Finished difference. Result has 82 places, 76 transitions, 282 flow [2025-03-17 14:29:47,752 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=282, PETRI_PLACES=82, PETRI_TRANSITIONS=76} [2025-03-17 14:29:47,753 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 4 predicate places. [2025-03-17 14:29:47,753 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 76 transitions, 282 flow [2025-03-17 14:29:47,753 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 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) [2025-03-17 14:29:47,753 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:29:47,753 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:29:47,753 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-03-17 14:29:47,754 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-03-17 14:29:47,754 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:29:47,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1243763328, now seen corresponding path program 1 times [2025-03-17 14:29:47,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:29:47,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248803954] [2025-03-17 14:29:47,754 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:29:47,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:29:47,760 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-17 14:29:47,767 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-17 14:29:47,768 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:29:47,768 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:29:47,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:29:47,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:29:47,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248803954] [2025-03-17 14:29:47,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248803954] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:29:47,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:29:47,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 14:29:47,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371051219] [2025-03-17 14:29:47,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:29:47,822 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:29:47,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:29:47,822 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:29:47,822 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:29:47,829 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 77 [2025-03-17 14:29:47,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 76 transitions, 282 flow. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 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) [2025-03-17 14:29:47,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:29:47,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 77 [2025-03-17 14:29:47,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:29:51,576 INFO L124 PetriNetUnfolderBase]: 46529/63769 cut-off events. [2025-03-17 14:29:51,577 INFO L125 PetriNetUnfolderBase]: For 8725/8725 co-relation queries the response was YES. [2025-03-17 14:29:51,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141802 conditions, 63769 events. 46529/63769 cut-off events. For 8725/8725 co-relation queries the response was YES. Maximal size of possible extension queue 2995. Compared 441453 event pairs, 40442 based on Foata normal form. 1142/47148 useless extension candidates. Maximal degree in co-relation 98820. Up to 53114 conditions per place. [2025-03-17 14:29:51,981 INFO L140 encePairwiseOnDemand]: 64/77 looper letters, 99 selfloop transitions, 9 changer transitions 0/117 dead transitions. [2025-03-17 14:29:51,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 117 transitions, 645 flow [2025-03-17 14:29:51,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:29:51,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:29:51,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 202 transitions. [2025-03-17 14:29:51,982 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5246753246753246 [2025-03-17 14:29:51,982 INFO L175 Difference]: Start difference. First operand has 82 places, 76 transitions, 282 flow. Second operand 5 states and 202 transitions. [2025-03-17 14:29:51,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 117 transitions, 645 flow [2025-03-17 14:29:52,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 117 transitions, 636 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:29:52,001 INFO L231 Difference]: Finished difference. Result has 86 places, 80 transitions, 360 flow [2025-03-17 14:29:52,002 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=360, PETRI_PLACES=86, PETRI_TRANSITIONS=80} [2025-03-17 14:29:52,002 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 8 predicate places. [2025-03-17 14:29:52,002 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 80 transitions, 360 flow [2025-03-17 14:29:52,002 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 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) [2025-03-17 14:29:52,002 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:29:52,002 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:29:52,002 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-03-17 14:29:52,002 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-03-17 14:29:52,003 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:29:52,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1677453288, now seen corresponding path program 1 times [2025-03-17 14:29:52,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:29:52,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512665373] [2025-03-17 14:29:52,003 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:29:52,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:29:52,009 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-17 14:29:52,013 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-17 14:29:52,013 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:29:52,013 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:29:52,114 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 14:29:52,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:29:52,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512665373] [2025-03-17 14:29:52,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512665373] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:29:52,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269030379] [2025-03-17 14:29:52,115 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:29:52,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:29:52,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:29:52,117 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:29:52,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-17 14:29:52,166 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-17 14:29:52,182 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-17 14:29:52,183 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:29:52,183 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:29:52,184 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-17 14:29:52,185 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:29:52,249 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 14:29:52,249 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:29:52,288 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2025-03-17 14:29:52,335 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 14:29:52,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269030379] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:29:52,336 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:29:52,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2025-03-17 14:29:52,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739129655] [2025-03-17 14:29:52,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:29:52,336 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-17 14:29:52,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:29:52,337 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-17 14:29:52,337 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2025-03-17 14:29:52,434 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 77 [2025-03-17 14:29:52,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 80 transitions, 360 flow. Second operand has 12 states, 12 states have (on average 22.083333333333332) internal successors, (265), 12 states have internal predecessors, (265), 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) [2025-03-17 14:29:52,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:29:52,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 77 [2025-03-17 14:29:52,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:29:56,979 INFO L124 PetriNetUnfolderBase]: 62957/85948 cut-off events. [2025-03-17 14:29:56,979 INFO L125 PetriNetUnfolderBase]: For 14015/14015 co-relation queries the response was YES. [2025-03-17 14:29:57,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209610 conditions, 85948 events. 62957/85948 cut-off events. For 14015/14015 co-relation queries the response was YES. Maximal size of possible extension queue 3351. Compared 599049 event pairs, 32342 based on Foata normal form. 0/61278 useless extension candidates. Maximal degree in co-relation 156491. Up to 34358 conditions per place. [2025-03-17 14:29:57,393 INFO L140 encePairwiseOnDemand]: 68/77 looper letters, 127 selfloop transitions, 17 changer transitions 0/153 dead transitions. [2025-03-17 14:29:57,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 153 transitions, 861 flow [2025-03-17 14:29:57,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 14:29:57,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 14:29:57,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 257 transitions. [2025-03-17 14:29:57,394 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5562770562770563 [2025-03-17 14:29:57,394 INFO L175 Difference]: Start difference. First operand has 86 places, 80 transitions, 360 flow. Second operand 6 states and 257 transitions. [2025-03-17 14:29:57,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 153 transitions, 861 flow [2025-03-17 14:29:57,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 153 transitions, 857 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 14:29:57,419 INFO L231 Difference]: Finished difference. Result has 91 places, 81 transitions, 400 flow [2025-03-17 14:29:57,419 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=400, PETRI_PLACES=91, PETRI_TRANSITIONS=81} [2025-03-17 14:29:57,419 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 13 predicate places. [2025-03-17 14:29:57,419 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 81 transitions, 400 flow [2025-03-17 14:29:57,420 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 22.083333333333332) internal successors, (265), 12 states have internal predecessors, (265), 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) [2025-03-17 14:29:57,420 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:29:57,420 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:29:57,426 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-17 14:29:57,620 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:29:57,620 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-03-17 14:29:57,621 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:29:57,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1677453285, now seen corresponding path program 1 times [2025-03-17 14:29:57,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:29:57,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241689338] [2025-03-17 14:29:57,621 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:29:57,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:29:57,626 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-17 14:29:57,633 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-17 14:29:57,633 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:29:57,633 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:29:57,737 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 14:29:57,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:29:57,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241689338] [2025-03-17 14:29:57,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241689338] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:29:57,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:29:57,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 14:29:57,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625505099] [2025-03-17 14:29:57,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:29:57,738 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:29:57,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:29:57,738 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:29:57,738 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-17 14:29:57,753 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 77 [2025-03-17 14:29:57,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 81 transitions, 400 flow. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:29:57,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:29:57,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 77 [2025-03-17 14:29:57,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:30:01,588 INFO L124 PetriNetUnfolderBase]: 48934/67255 cut-off events. [2025-03-17 14:30:01,589 INFO L125 PetriNetUnfolderBase]: For 16952/16952 co-relation queries the response was YES. [2025-03-17 14:30:01,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164930 conditions, 67255 events. 48934/67255 cut-off events. For 16952/16952 co-relation queries the response was YES. Maximal size of possible extension queue 2635. Compared 466579 event pairs, 42324 based on Foata normal form. 0/51922 useless extension candidates. Maximal degree in co-relation 117721. Up to 65050 conditions per place. [2025-03-17 14:30:01,892 INFO L140 encePairwiseOnDemand]: 72/77 looper letters, 62 selfloop transitions, 8 changer transitions 0/79 dead transitions. [2025-03-17 14:30:01,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 79 transitions, 532 flow [2025-03-17 14:30:01,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:30:01,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:30:01,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 138 transitions. [2025-03-17 14:30:01,893 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35844155844155845 [2025-03-17 14:30:01,893 INFO L175 Difference]: Start difference. First operand has 91 places, 81 transitions, 400 flow. Second operand 5 states and 138 transitions. [2025-03-17 14:30:01,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 79 transitions, 532 flow [2025-03-17 14:30:01,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 79 transitions, 504 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-17 14:30:01,937 INFO L231 Difference]: Finished difference. Result has 90 places, 79 transitions, 380 flow [2025-03-17 14:30:01,938 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=380, PETRI_PLACES=90, PETRI_TRANSITIONS=79} [2025-03-17 14:30:01,938 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 12 predicate places. [2025-03-17 14:30:01,938 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 79 transitions, 380 flow [2025-03-17 14:30:01,938 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:30:01,938 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:30:01,938 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:30:01,938 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2025-03-17 14:30:01,938 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-03-17 14:30:01,939 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:30:01,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1677453286, now seen corresponding path program 1 times [2025-03-17 14:30:01,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:30:01,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99042447] [2025-03-17 14:30:01,939 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:30:01,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:30:01,944 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-17 14:30:01,949 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-17 14:30:01,949 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:30:01,949 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:30:02,221 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:30:02,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:30:02,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99042447] [2025-03-17 14:30:02,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99042447] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:30:02,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496636795] [2025-03-17 14:30:02,222 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:30:02,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:30:02,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:30:02,224 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:30:02,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-17 14:30:02,270 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-17 14:30:02,285 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-17 14:30:02,285 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:30:02,285 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:30:02,286 INFO L256 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-17 14:30:02,288 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:30:02,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-17 14:30:02,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-17 14:30:02,341 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-17 14:30:02,350 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-17 14:30:02,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-03-17 14:30:02,377 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-03-17 14:30:02,377 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2025-03-17 14:30:02,504 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:30:02,504 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:30:02,744 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 185 treesize of output 179 [2025-03-17 14:30:02,880 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:30:02,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496636795] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:30:02,881 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:30:02,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2025-03-17 14:30:02,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008650586] [2025-03-17 14:30:02,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:30:02,881 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-17 14:30:02,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:30:02,882 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-17 14:30:02,882 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2025-03-17 14:30:03,019 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 77 [2025-03-17 14:30:03,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 79 transitions, 380 flow. Second operand has 17 states, 17 states have (on average 15.941176470588236) internal successors, (271), 17 states have internal predecessors, (271), 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) [2025-03-17 14:30:03,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:30:03,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 77 [2025-03-17 14:30:03,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:30:11,884 INFO L124 PetriNetUnfolderBase]: 71027/97186 cut-off events. [2025-03-17 14:30:11,885 INFO L125 PetriNetUnfolderBase]: For 25357/25357 co-relation queries the response was YES. [2025-03-17 14:30:12,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 237129 conditions, 97186 events. 71027/97186 cut-off events. For 25357/25357 co-relation queries the response was YES. Maximal size of possible extension queue 3304. Compared 687710 event pairs, 60700 based on Foata normal form. 0/77357 useless extension candidates. Maximal degree in co-relation 94139. Up to 58310 conditions per place. [2025-03-17 14:30:12,453 INFO L140 encePairwiseOnDemand]: 65/77 looper letters, 121 selfloop transitions, 47 changer transitions 0/177 dead transitions. [2025-03-17 14:30:12,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 177 transitions, 1131 flow [2025-03-17 14:30:12,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-17 14:30:12,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-03-17 14:30:12,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 377 transitions. [2025-03-17 14:30:12,455 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3060064935064935 [2025-03-17 14:30:12,455 INFO L175 Difference]: Start difference. First operand has 90 places, 79 transitions, 380 flow. Second operand 16 states and 377 transitions. [2025-03-17 14:30:12,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 177 transitions, 1131 flow [2025-03-17 14:30:12,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 177 transitions, 1112 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-17 14:30:12,556 INFO L231 Difference]: Finished difference. Result has 108 places, 111 transitions, 743 flow [2025-03-17 14:30:12,556 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=369, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=743, PETRI_PLACES=108, PETRI_TRANSITIONS=111} [2025-03-17 14:30:12,557 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 30 predicate places. [2025-03-17 14:30:12,557 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 111 transitions, 743 flow [2025-03-17 14:30:12,557 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 15.941176470588236) internal successors, (271), 17 states have internal predecessors, (271), 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) [2025-03-17 14:30:12,557 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:30:12,557 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:30:12,563 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-17 14:30:12,757 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-03-17 14:30:12,757 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-03-17 14:30:12,758 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:30:12,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1677453287, now seen corresponding path program 1 times [2025-03-17 14:30:12,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:30:12,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481360309] [2025-03-17 14:30:12,758 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:30:12,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:30:12,764 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-17 14:30:12,768 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-17 14:30:12,768 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:30:12,768 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:30:12,806 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 14:30:12,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:30:12,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481360309] [2025-03-17 14:30:12,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481360309] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:30:12,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:30:12,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 14:30:12,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208413647] [2025-03-17 14:30:12,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:30:12,808 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:30:12,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:30:12,808 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:30:12,808 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:30:12,820 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 77 [2025-03-17 14:30:12,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 111 transitions, 743 flow. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:30:12,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:30:12,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 77 [2025-03-17 14:30:12,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand