./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e2fb8bed 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-series.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 8dbd267b0e0821e8d358e8d234024d8e484ea32431972ed8b70b87052179a50c --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-09 01:26:00,043 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-09 01:26:00,108 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-03-09 01:26:00,115 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-09 01:26:00,116 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-09 01:26:00,136 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-09 01:26:00,137 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-09 01:26:00,137 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-09 01:26:00,138 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-09 01:26:00,138 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-09 01:26:00,138 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-09 01:26:00,138 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-09 01:26:00,139 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-09 01:26:00,139 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-09 01:26:00,139 INFO L153 SettingsManager]: * Use SBE=true [2025-03-09 01:26:00,139 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-09 01:26:00,139 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-09 01:26:00,139 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-09 01:26:00,140 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-09 01:26:00,140 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-09 01:26:00,140 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-09 01:26:00,140 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-09 01:26:00,140 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-09 01:26:00,140 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-09 01:26:00,140 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-09 01:26:00,140 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-09 01:26:00,140 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-09 01:26:00,140 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-09 01:26:00,140 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-09 01:26:00,140 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-09 01:26:00,140 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-09 01:26:00,140 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-09 01:26:00,141 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-09 01:26:00,141 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-09 01:26:00,141 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-09 01:26:00,141 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-09 01:26:00,141 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-09 01:26:00,141 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-09 01:26:00,141 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-09 01:26:00,141 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-09 01:26:00,141 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-09 01:26:00,141 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-09 01:26:00,141 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 -> 8dbd267b0e0821e8d358e8d234024d8e484ea32431972ed8b70b87052179a50c [2025-03-09 01:26:00,380 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-09 01:26:00,388 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-09 01:26:00,390 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-09 01:26:00,392 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-09 01:26:00,392 INFO L274 PluginConnector]: CDTParser initialized [2025-03-09 01:26:00,393 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c [2025-03-09 01:26:01,588 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61c6b9d93/c35b22019354411ba5892dade060f24c/FLAG6716723a1 [2025-03-09 01:26:01,797 INFO L384 CDTParser]: Found 1 translation units. [2025-03-09 01:26:01,797 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c [2025-03-09 01:26:01,806 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61c6b9d93/c35b22019354411ba5892dade060f24c/FLAG6716723a1 [2025-03-09 01:26:01,817 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61c6b9d93/c35b22019354411ba5892dade060f24c [2025-03-09 01:26:01,819 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-09 01:26:01,820 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-09 01:26:01,821 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-09 01:26:01,821 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-09 01:26:01,824 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-09 01:26:01,824 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.03 01:26:01" (1/1) ... [2025-03-09 01:26:01,825 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15aa2641 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:26:01, skipping insertion in model container [2025-03-09 01:26:01,825 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.03 01:26:01" (1/1) ... [2025-03-09 01:26:01,836 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-09 01:26:01,954 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-09 01:26:01,957 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-09 01:26:01,966 INFO L200 MainTranslator]: Completed pre-run [2025-03-09 01:26:01,991 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-09 01:26:02,001 INFO L204 MainTranslator]: Completed translation [2025-03-09 01:26:02,002 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:26:02 WrapperNode [2025-03-09 01:26:02,002 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-09 01:26:02,003 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-09 01:26:02,003 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-09 01:26:02,003 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-09 01:26:02,007 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:26:02" (1/1) ... [2025-03-09 01:26:02,012 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:26:02" (1/1) ... [2025-03-09 01:26:02,030 INFO L138 Inliner]: procedures = 26, calls = 68, calls flagged for inlining = 23, calls inlined = 29, statements flattened = 321 [2025-03-09 01:26:02,031 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-09 01:26:02,031 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-09 01:26:02,031 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-09 01:26:02,032 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-09 01:26:02,037 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:26:02" (1/1) ... [2025-03-09 01:26:02,038 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:26:02" (1/1) ... [2025-03-09 01:26:02,040 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:26:02" (1/1) ... [2025-03-09 01:26:02,057 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]. [2025-03-09 01:26:02,057 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:26:02" (1/1) ... [2025-03-09 01:26:02,057 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:26:02" (1/1) ... [2025-03-09 01:26:02,069 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:26:02" (1/1) ... [2025-03-09 01:26:02,070 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:26:02" (1/1) ... [2025-03-09 01:26:02,071 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:26:02" (1/1) ... [2025-03-09 01:26:02,072 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:26:02" (1/1) ... [2025-03-09 01:26:02,074 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-09 01:26:02,075 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-09 01:26:02,075 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-09 01:26:02,075 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-09 01:26:02,075 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:26:02" (1/1) ... [2025-03-09 01:26:02,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-09 01:26:02,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:26:02,106 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) [2025-03-09 01:26:02,112 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 [2025-03-09 01:26:02,129 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-09 01:26:02,129 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-09 01:26:02,129 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-09 01:26:02,130 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-09 01:26:02,130 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-09 01:26:02,130 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-09 01:26:02,130 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-09 01:26:02,131 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-09 01:26:02,131 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-09 01:26:02,131 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-03-09 01:26:02,131 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-03-09 01:26:02,131 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2025-03-09 01:26:02,131 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2025-03-09 01:26:02,131 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-09 01:26:02,131 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-09 01:26:02,131 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-03-09 01:26:02,131 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-03-09 01:26:02,131 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-09 01:26:02,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-09 01:26:02,132 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-09 01:26:02,133 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-09 01:26:02,234 INFO L256 CfgBuilder]: Building ICFG [2025-03-09 01:26:02,236 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-09 01:26:02,658 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-09 01:26:02,658 INFO L307 CfgBuilder]: Performing block encoding [2025-03-09 01:26:02,955 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-09 01:26:02,956 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-09 01:26:02,956 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 09.03 01:26:02 BoogieIcfgContainer [2025-03-09 01:26:02,956 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-09 01:26:02,957 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-09 01:26:02,957 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-09 01:26:02,960 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-09 01:26:02,961 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.03 01:26:01" (1/3) ... [2025-03-09 01:26:02,961 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bb78eea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.03 01:26:02, skipping insertion in model container [2025-03-09 01:26:02,962 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:26:02" (2/3) ... [2025-03-09 01:26:02,962 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bb78eea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.03 01:26:02, skipping insertion in model container [2025-03-09 01:26:02,962 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 09.03 01:26:02" (3/3) ... [2025-03-09 01:26:02,963 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-series.wvr.c [2025-03-09 01:26:02,976 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-09 01:26:02,978 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-buffer-series.wvr.c that has 5 procedures, 71 locations, 1 initial locations, 7 loop locations, and 22 error locations. [2025-03-09 01:26:02,978 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-09 01:26:03,048 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2025-03-09 01:26:03,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 77 transitions, 182 flow [2025-03-09 01:26:03,115 INFO L124 PetriNetUnfolderBase]: 7/73 cut-off events. [2025-03-09 01:26:03,117 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-03-09 01:26:03,122 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 10. Compared 183 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. [2025-03-09 01:26:03,122 INFO L82 GeneralOperation]: Start removeDead. Operand has 83 places, 77 transitions, 182 flow [2025-03-09 01:26:03,124 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 78 places, 72 transitions, 168 flow [2025-03-09 01:26:03,133 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-09 01:26:03,143 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;@4cb792db, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-09 01:26:03,145 INFO L334 AbstractCegarLoop]: Starting to check reachability of 40 error locations. [2025-03-09 01:26:03,168 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-09 01:26:03,169 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-03-09 01:26:03,169 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-09 01:26:03,169 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:26:03,169 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-09 01:26:03,170 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-03-09 01:26:03,174 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:26:03,174 INFO L85 PathProgramCache]: Analyzing trace with hash 929051, now seen corresponding path program 1 times [2025-03-09 01:26:03,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:26:03,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934103311] [2025-03-09 01:26:03,181 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:26:03,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:26:03,238 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-09 01:26:03,255 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-09 01:26:03,256 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:26:03,256 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:26:03,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:26:03,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:26:03,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934103311] [2025-03-09 01:26:03,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934103311] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:26:03,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:26:03,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-03-09 01:26:03,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907577723] [2025-03-09 01:26:03,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:26:03,393 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-09 01:26:03,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:26:03,412 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-09 01:26:03,412 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-09 01:26:03,424 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 77 [2025-03-09 01:26:03,426 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) [2025-03-09 01:26:03,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:26:03,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 77 [2025-03-09 01:26:03,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:26:05,947 INFO L124 PetriNetUnfolderBase]: 24724/32935 cut-off events. [2025-03-09 01:26:05,947 INFO L125 PetriNetUnfolderBase]: For 855/855 co-relation queries the response was YES. [2025-03-09 01:26:06,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66545 conditions, 32935 events. 24724/32935 cut-off events. For 855/855 co-relation queries the response was YES. Maximal size of possible extension queue 1886. Compared 205782 event pairs, 20908 based on Foata normal form. 1/21514 useless extension candidates. Maximal degree in co-relation 63308. Up to 32075 conditions per place. [2025-03-09 01:26:06,217 INFO L140 encePairwiseOnDemand]: 69/77 looper letters, 51 selfloop transitions, 2 changer transitions 0/65 dead transitions. [2025-03-09 01:26:06,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 65 transitions, 260 flow [2025-03-09 01:26:06,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-09 01:26:06,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-09 01:26:06,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 110 transitions. [2025-03-09 01:26:06,227 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2025-03-09 01:26:06,228 INFO L175 Difference]: Start difference. First operand has 78 places, 72 transitions, 168 flow. Second operand 3 states and 110 transitions. [2025-03-09 01:26:06,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 65 transitions, 260 flow [2025-03-09 01:26:06,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 65 transitions, 244 flow, removed 0 selfloop flow, removed 8 redundant places. [2025-03-09 01:26:06,357 INFO L231 Difference]: Finished difference. Result has 65 places, 65 transitions, 142 flow [2025-03-09 01:26:06,359 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} [2025-03-09 01:26:06,361 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, -13 predicate places. [2025-03-09 01:26:06,362 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 65 transitions, 142 flow [2025-03-09 01:26:06,362 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) [2025-03-09 01:26:06,362 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:26:06,362 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-09 01:26:06,362 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-09 01:26:06,362 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-03-09 01:26:06,363 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:26:06,363 INFO L85 PathProgramCache]: Analyzing trace with hash 929052, now seen corresponding path program 1 times [2025-03-09 01:26:06,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:26:06,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874642380] [2025-03-09 01:26:06,363 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:26:06,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:26:06,370 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-09 01:26:06,397 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-09 01:26:06,398 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:26:06,398 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:26:06,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:26:06,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:26:06,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874642380] [2025-03-09 01:26:06,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874642380] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:26:06,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:26:06,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-09 01:26:06,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355821424] [2025-03-09 01:26:06,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:26:06,698 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-09 01:26:06,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:26:06,698 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-09 01:26:06,699 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-09 01:26:06,721 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 77 [2025-03-09 01:26:06,722 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) [2025-03-09 01:26:06,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:26:06,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 77 [2025-03-09 01:26:06,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:26:08,688 INFO L124 PetriNetUnfolderBase]: 24724/32934 cut-off events. [2025-03-09 01:26:08,689 INFO L125 PetriNetUnfolderBase]: For 124/124 co-relation queries the response was YES. [2025-03-09 01:26:08,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65601 conditions, 32934 events. 24724/32934 cut-off events. For 124/124 co-relation queries the response was YES. Maximal size of possible extension queue 1886. Compared 205792 event pairs, 20908 based on Foata normal form. 0/21511 useless extension candidates. Maximal degree in co-relation 65572. Up to 32083 conditions per place. [2025-03-09 01:26:08,847 INFO L140 encePairwiseOnDemand]: 72/77 looper letters, 51 selfloop transitions, 4 changer transitions 0/64 dead transitions. [2025-03-09 01:26:08,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 64 transitions, 250 flow [2025-03-09 01:26:08,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-09 01:26:08,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-09 01:26:08,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 124 transitions. [2025-03-09 01:26:08,851 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4025974025974026 [2025-03-09 01:26:08,851 INFO L175 Difference]: Start difference. First operand has 65 places, 65 transitions, 142 flow. Second operand 4 states and 124 transitions. [2025-03-09 01:26:08,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 64 transitions, 250 flow [2025-03-09 01:26:08,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 64 transitions, 246 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-09 01:26:08,852 INFO L231 Difference]: Finished difference. Result has 65 places, 64 transitions, 144 flow [2025-03-09 01:26:08,852 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=144, PETRI_PLACES=65, PETRI_TRANSITIONS=64} [2025-03-09 01:26:08,852 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, -13 predicate places. [2025-03-09 01:26:08,852 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 64 transitions, 144 flow [2025-03-09 01:26:08,853 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) [2025-03-09 01:26:08,853 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:26:08,853 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2025-03-09 01:26:08,853 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-09 01:26:08,853 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-03-09 01:26:08,853 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:26:08,853 INFO L85 PathProgramCache]: Analyzing trace with hash 28803964, now seen corresponding path program 1 times [2025-03-09 01:26:08,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:26:08,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244687400] [2025-03-09 01:26:08,854 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:26:08,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:26:08,861 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-03-09 01:26:08,879 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-03-09 01:26:08,879 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:26:08,879 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:26:09,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:26:09,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:26:09,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244687400] [2025-03-09 01:26:09,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244687400] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:26:09,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:26:09,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-09 01:26:09,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307228652] [2025-03-09 01:26:09,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:26:09,049 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-09 01:26:09,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:26:09,049 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-09 01:26:09,049 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-09 01:26:09,066 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 77 [2025-03-09 01:26:09,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 64 transitions, 144 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) [2025-03-09 01:26:09,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:26:09,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 77 [2025-03-09 01:26:09,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:26:10,564 INFO L124 PetriNetUnfolderBase]: 24726/32940 cut-off events. [2025-03-09 01:26:10,564 INFO L125 PetriNetUnfolderBase]: For 124/124 co-relation queries the response was YES. [2025-03-09 01:26:10,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65618 conditions, 32940 events. 24726/32940 cut-off events. For 124/124 co-relation queries the response was YES. Maximal size of possible extension queue 1886. Compared 206142 event pairs, 20908 based on Foata normal form. 0/21514 useless extension candidates. Maximal degree in co-relation 65594. Up to 32086 conditions per place. [2025-03-09 01:26:10,712 INFO L140 encePairwiseOnDemand]: 69/77 looper letters, 54 selfloop transitions, 7 changer transitions 0/70 dead transitions. [2025-03-09 01:26:10,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 70 transitions, 284 flow [2025-03-09 01:26:10,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-09 01:26:10,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-09 01:26:10,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 147 transitions. [2025-03-09 01:26:10,714 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38181818181818183 [2025-03-09 01:26:10,714 INFO L175 Difference]: Start difference. First operand has 65 places, 64 transitions, 144 flow. Second operand 5 states and 147 transitions. [2025-03-09 01:26:10,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 70 transitions, 284 flow [2025-03-09 01:26:10,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 70 transitions, 270 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-09 01:26:10,720 INFO L231 Difference]: Finished difference. Result has 69 places, 70 transitions, 189 flow [2025-03-09 01:26:10,720 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=189, PETRI_PLACES=69, PETRI_TRANSITIONS=70} [2025-03-09 01:26:10,721 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, -9 predicate places. [2025-03-09 01:26:10,721 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 70 transitions, 189 flow [2025-03-09 01:26:10,721 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) [2025-03-09 01:26:10,721 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:26:10,721 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2025-03-09 01:26:10,722 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-09 01:26:10,722 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-03-09 01:26:10,722 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:26:10,722 INFO L85 PathProgramCache]: Analyzing trace with hash 892923183, now seen corresponding path program 1 times [2025-03-09 01:26:10,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:26:10,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425311211] [2025-03-09 01:26:10,722 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:26:10,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:26:10,729 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-03-09 01:26:10,737 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-03-09 01:26:10,737 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:26:10,737 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:26:10,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:26:10,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:26:10,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425311211] [2025-03-09 01:26:10,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425311211] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:26:10,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:26:10,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-09 01:26:10,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882696011] [2025-03-09 01:26:10,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:26:10,899 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-09 01:26:10,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:26:10,899 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-09 01:26:10,900 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-09 01:26:10,916 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 77 [2025-03-09 01:26:10,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 70 transitions, 189 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) [2025-03-09 01:26:10,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:26:10,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 77 [2025-03-09 01:26:10,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:26:13,023 INFO L124 PetriNetUnfolderBase]: 24727/32943 cut-off events. [2025-03-09 01:26:13,023 INFO L125 PetriNetUnfolderBase]: For 125/125 co-relation queries the response was YES. [2025-03-09 01:26:13,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65640 conditions, 32943 events. 24727/32943 cut-off events. For 125/125 co-relation queries the response was YES. Maximal size of possible extension queue 1886. Compared 206134 event pairs, 20908 based on Foata normal form. 0/21519 useless extension candidates. Maximal degree in co-relation 65596. Up to 32089 conditions per place. [2025-03-09 01:26:13,265 INFO L140 encePairwiseOnDemand]: 68/77 looper letters, 55 selfloop transitions, 9 changer transitions 0/73 dead transitions. [2025-03-09 01:26:13,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 73 transitions, 323 flow [2025-03-09 01:26:13,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-09 01:26:13,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-09 01:26:13,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 147 transitions. [2025-03-09 01:26:13,267 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38181818181818183 [2025-03-09 01:26:13,267 INFO L175 Difference]: Start difference. First operand has 69 places, 70 transitions, 189 flow. Second operand 5 states and 147 transitions. [2025-03-09 01:26:13,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 73 transitions, 323 flow [2025-03-09 01:26:13,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 73 transitions, 322 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-09 01:26:13,269 INFO L231 Difference]: Finished difference. Result has 74 places, 73 transitions, 231 flow [2025-03-09 01:26:13,270 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=188, 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=231, PETRI_PLACES=74, PETRI_TRANSITIONS=73} [2025-03-09 01:26:13,270 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, -4 predicate places. [2025-03-09 01:26:13,270 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 73 transitions, 231 flow [2025-03-09 01:26:13,270 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) [2025-03-09 01:26:13,270 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:26:13,270 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2025-03-09 01:26:13,270 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-09 01:26:13,270 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-03-09 01:26:13,271 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:26:13,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1910835330, now seen corresponding path program 1 times [2025-03-09 01:26:13,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:26:13,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776252492] [2025-03-09 01:26:13,271 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:26:13,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:26:13,278 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-09 01:26:13,293 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-09 01:26:13,293 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:26:13,293 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:26:13,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:26:13,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:26:13,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776252492] [2025-03-09 01:26:13,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776252492] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:26:13,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929127646] [2025-03-09 01:26:13,506 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:26:13,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:26:13,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:26:13,510 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) [2025-03-09 01:26:13,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-09 01:26:13,570 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-09 01:26:13,586 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-09 01:26:13,587 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:26:13,587 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:26:13,591 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-09 01:26:13,594 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:26:13,684 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 [2025-03-09 01:26:13,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:26:13,779 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:26:13,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:26:13,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929127646] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:26:13,898 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 01:26:13,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2025-03-09 01:26:13,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484601284] [2025-03-09 01:26:13,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 01:26:13,899 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-09 01:26:13,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:26:13,900 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-09 01:26:13,900 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2025-03-09 01:26:14,019 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 77 [2025-03-09 01:26:14,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 73 transitions, 231 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) [2025-03-09 01:26:14,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:26:14,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 77 [2025-03-09 01:26:14,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:26:16,017 INFO L124 PetriNetUnfolderBase]: 24729/32948 cut-off events. [2025-03-09 01:26:16,017 INFO L125 PetriNetUnfolderBase]: For 133/133 co-relation queries the response was YES. [2025-03-09 01:26:16,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65678 conditions, 32948 events. 24729/32948 cut-off events. For 133/133 co-relation queries the response was YES. Maximal size of possible extension queue 1886. Compared 206167 event pairs, 20908 based on Foata normal form. 0/21527 useless extension candidates. Maximal degree in co-relation 65618. Up to 32083 conditions per place. [2025-03-09 01:26:16,291 INFO L140 encePairwiseOnDemand]: 69/77 looper letters, 51 selfloop transitions, 18 changer transitions 0/78 dead transitions. [2025-03-09 01:26:16,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 78 transitions, 394 flow [2025-03-09 01:26:16,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-09 01:26:16,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-09 01:26:16,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2025-03-09 01:26:16,293 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3189033189033189 [2025-03-09 01:26:16,293 INFO L175 Difference]: Start difference. First operand has 74 places, 73 transitions, 231 flow. Second operand 9 states and 221 transitions. [2025-03-09 01:26:16,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 78 transitions, 394 flow [2025-03-09 01:26:16,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 78 transitions, 386 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-09 01:26:16,296 INFO L231 Difference]: Finished difference. Result has 79 places, 78 transitions, 284 flow [2025-03-09 01:26:16,296 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=220, 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=9, PETRI_FLOW=284, PETRI_PLACES=79, PETRI_TRANSITIONS=78} [2025-03-09 01:26:16,297 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 1 predicate places. [2025-03-09 01:26:16,297 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 78 transitions, 284 flow [2025-03-09 01:26:16,297 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) [2025-03-09 01:26:16,297 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:26:16,297 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2025-03-09 01:26:16,304 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-09 01:26:16,502 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:26:16,502 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-03-09 01:26:16,503 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:26:16,503 INFO L85 PathProgramCache]: Analyzing trace with hash -894252045, now seen corresponding path program 1 times [2025-03-09 01:26:16,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:26:16,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581398901] [2025-03-09 01:26:16,503 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:26:16,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:26:16,510 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-09 01:26:16,520 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-09 01:26:16,520 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:26:16,520 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:26:16,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:26:16,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:26:16,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581398901] [2025-03-09 01:26:16,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581398901] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:26:16,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538104419] [2025-03-09 01:26:16,679 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:26:16,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:26:16,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:26:16,682 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) [2025-03-09 01:26:16,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-09 01:26:16,732 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-09 01:26:16,760 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-09 01:26:16,760 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:26:16,760 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:26:16,761 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-09 01:26:16,763 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:26:16,777 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 [2025-03-09 01:26:16,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:26:16,932 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:26:17,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:26:17,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538104419] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:26:17,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 01:26:17,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2025-03-09 01:26:17,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001110482] [2025-03-09 01:26:17,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 01:26:17,078 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-09 01:26:17,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:26:17,079 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-09 01:26:17,079 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2025-03-09 01:26:17,168 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 77 [2025-03-09 01:26:17,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 78 transitions, 284 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) [2025-03-09 01:26:17,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:26:17,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 77 [2025-03-09 01:26:17,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:26:18,866 INFO L124 PetriNetUnfolderBase]: 24729/32947 cut-off events. [2025-03-09 01:26:18,867 INFO L125 PetriNetUnfolderBase]: For 132/132 co-relation queries the response was YES. [2025-03-09 01:26:18,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65689 conditions, 32947 events. 24729/32947 cut-off events. For 132/132 co-relation queries the response was YES. Maximal size of possible extension queue 1886. Compared 206201 event pairs, 20908 based on Foata normal form. 0/21527 useless extension candidates. Maximal degree in co-relation 65626. Up to 32084 conditions per place. [2025-03-09 01:26:19,101 INFO L140 encePairwiseOnDemand]: 68/77 looper letters, 49 selfloop transitions, 19 changer transitions 0/77 dead transitions. [2025-03-09 01:26:19,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 77 transitions, 416 flow [2025-03-09 01:26:19,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-09 01:26:19,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-09 01:26:19,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2025-03-09 01:26:19,102 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3320964749536178 [2025-03-09 01:26:19,103 INFO L175 Difference]: Start difference. First operand has 79 places, 78 transitions, 284 flow. Second operand 7 states and 179 transitions. [2025-03-09 01:26:19,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 77 transitions, 416 flow [2025-03-09 01:26:19,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 77 transitions, 370 flow, removed 10 selfloop flow, removed 6 redundant places. [2025-03-09 01:26:19,105 INFO L231 Difference]: Finished difference. Result has 78 places, 77 transitions, 272 flow [2025-03-09 01:26:19,105 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=272, PETRI_PLACES=78, PETRI_TRANSITIONS=77} [2025-03-09 01:26:19,105 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 0 predicate places. [2025-03-09 01:26:19,105 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 77 transitions, 272 flow [2025-03-09 01:26:19,106 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) [2025-03-09 01:26:19,106 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:26:19,106 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:26:19,112 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-09 01:26:19,306 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 [2025-03-09 01:26:19,307 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-03-09 01:26:19,307 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:26:19,307 INFO L85 PathProgramCache]: Analyzing trace with hash -260887368, now seen corresponding path program 1 times [2025-03-09 01:26:19,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:26:19,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921104882] [2025-03-09 01:26:19,307 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:26:19,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:26:19,315 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-09 01:26:19,320 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-09 01:26:19,320 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:26:19,320 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:26:19,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:26:19,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:26:19,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921104882] [2025-03-09 01:26:19,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921104882] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:26:19,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:26:19,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-09 01:26:19,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957969] [2025-03-09 01:26:19,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:26:19,386 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-09 01:26:19,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:26:19,387 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-09 01:26:19,387 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-09 01:26:19,392 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 77 [2025-03-09 01:26:19,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 77 transitions, 272 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) [2025-03-09 01:26:19,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:26:19,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 77 [2025-03-09 01:26:19,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:26:20,981 INFO L124 PetriNetUnfolderBase]: 28428/38184 cut-off events. [2025-03-09 01:26:20,981 INFO L125 PetriNetUnfolderBase]: For 140/140 co-relation queries the response was YES. [2025-03-09 01:26:21,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76152 conditions, 38184 events. 28428/38184 cut-off events. For 140/140 co-relation queries the response was YES. Maximal size of possible extension queue 2064. Compared 243324 event pairs, 24260 based on Foata normal form. 811/26545 useless extension candidates. Maximal degree in co-relation 65635. Up to 32096 conditions per place. [2025-03-09 01:26:21,227 INFO L140 encePairwiseOnDemand]: 60/77 looper letters, 101 selfloop transitions, 14 changer transitions 0/124 dead transitions. [2025-03-09 01:26:21,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 124 transitions, 662 flow [2025-03-09 01:26:21,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-09 01:26:21,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-09 01:26:21,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 206 transitions. [2025-03-09 01:26:21,229 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.535064935064935 [2025-03-09 01:26:21,229 INFO L175 Difference]: Start difference. First operand has 78 places, 77 transitions, 272 flow. Second operand 5 states and 206 transitions. [2025-03-09 01:26:21,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 124 transitions, 662 flow [2025-03-09 01:26:21,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 124 transitions, 598 flow, removed 6 selfloop flow, removed 6 redundant places. [2025-03-09 01:26:21,231 INFO L231 Difference]: Finished difference. Result has 78 places, 88 transitions, 368 flow [2025-03-09 01:26:21,231 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=368, PETRI_PLACES=78, PETRI_TRANSITIONS=88} [2025-03-09 01:26:21,231 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 0 predicate places. [2025-03-09 01:26:21,231 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 88 transitions, 368 flow [2025-03-09 01:26:21,231 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) [2025-03-09 01:26:21,231 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:26:21,231 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:26:21,231 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-03-09 01:26:21,232 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-03-09 01:26:21,232 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:26:21,232 INFO L85 PathProgramCache]: Analyzing trace with hash 659202604, now seen corresponding path program 1 times [2025-03-09 01:26:21,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:26:21,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831879804] [2025-03-09 01:26:21,232 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:26:21,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:26:21,238 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-09 01:26:21,249 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-09 01:26:21,249 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:26:21,249 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:26:21,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-09 01:26:21,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:26:21,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831879804] [2025-03-09 01:26:21,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831879804] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:26:21,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:26:21,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-09 01:26:21,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798636960] [2025-03-09 01:26:21,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:26:21,364 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-09 01:26:21,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:26:21,365 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-09 01:26:21,365 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-09 01:26:21,377 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 77 [2025-03-09 01:26:21,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 88 transitions, 368 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) [2025-03-09 01:26:21,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:26:21,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 77 [2025-03-09 01:26:21,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:26:25,621 INFO L124 PetriNetUnfolderBase]: 66214/87527 cut-off events. [2025-03-09 01:26:25,622 INFO L125 PetriNetUnfolderBase]: For 2751/2751 co-relation queries the response was YES. [2025-03-09 01:26:25,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192271 conditions, 87527 events. 66214/87527 cut-off events. For 2751/2751 co-relation queries the response was YES. Maximal size of possible extension queue 3445. Compared 576625 event pairs, 27618 based on Foata normal form. 0/58234 useless extension candidates. Maximal degree in co-relation 168158. Up to 38010 conditions per place. [2025-03-09 01:26:25,998 INFO L140 encePairwiseOnDemand]: 70/77 looper letters, 173 selfloop transitions, 12 changer transitions 0/193 dead transitions. [2025-03-09 01:26:25,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 193 transitions, 994 flow [2025-03-09 01:26:25,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-09 01:26:25,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-09 01:26:25,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 277 transitions. [2025-03-09 01:26:26,000 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5995670995670995 [2025-03-09 01:26:26,000 INFO L175 Difference]: Start difference. First operand has 78 places, 88 transitions, 368 flow. Second operand 6 states and 277 transitions. [2025-03-09 01:26:26,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 193 transitions, 994 flow [2025-03-09 01:26:26,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 193 transitions, 990 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-03-09 01:26:26,009 INFO L231 Difference]: Finished difference. Result has 85 places, 90 transitions, 411 flow [2025-03-09 01:26:26,009 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=411, PETRI_PLACES=85, PETRI_TRANSITIONS=90} [2025-03-09 01:26:26,010 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 7 predicate places. [2025-03-09 01:26:26,010 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 90 transitions, 411 flow [2025-03-09 01:26:26,010 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) [2025-03-09 01:26:26,010 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:26:26,010 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:26:26,010 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-03-09 01:26:26,010 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-03-09 01:26:26,011 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:26:26,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1596043265, now seen corresponding path program 1 times [2025-03-09 01:26:26,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:26:26,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365039475] [2025-03-09 01:26:26,011 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:26:26,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:26:26,016 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-09 01:26:26,020 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-09 01:26:26,020 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:26:26,020 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:26:26,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:26:26,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:26:26,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365039475] [2025-03-09 01:26:26,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365039475] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:26:26,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:26:26,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-09 01:26:26,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861876256] [2025-03-09 01:26:26,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:26:26,088 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-09 01:26:26,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:26:26,089 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-09 01:26:26,089 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-09 01:26:26,108 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 77 [2025-03-09 01:26:26,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 90 transitions, 411 flow. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 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) [2025-03-09 01:26:26,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:26:26,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 77 [2025-03-09 01:26:26,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:26:30,308 INFO L124 PetriNetUnfolderBase]: 48472/65477 cut-off events. [2025-03-09 01:26:30,308 INFO L125 PetriNetUnfolderBase]: For 8242/8242 co-relation queries the response was YES. [2025-03-09 01:26:30,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148063 conditions, 65477 events. 48472/65477 cut-off events. For 8242/8242 co-relation queries the response was YES. Maximal size of possible extension queue 2605. Compared 440617 event pairs, 41695 based on Foata normal form. 0/46504 useless extension candidates. Maximal degree in co-relation 128294. Up to 63656 conditions per place. [2025-03-09 01:26:30,616 INFO L140 encePairwiseOnDemand]: 73/77 looper letters, 75 selfloop transitions, 4 changer transitions 0/88 dead transitions. [2025-03-09 01:26:30,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 88 transitions, 563 flow [2025-03-09 01:26:30,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-09 01:26:30,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-09 01:26:30,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 121 transitions. [2025-03-09 01:26:30,617 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2025-03-09 01:26:30,617 INFO L175 Difference]: Start difference. First operand has 85 places, 90 transitions, 411 flow. Second operand 4 states and 121 transitions. [2025-03-09 01:26:30,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 88 transitions, 563 flow [2025-03-09 01:26:30,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 88 transitions, 555 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-09 01:26:30,637 INFO L231 Difference]: Finished difference. Result has 84 places, 88 transitions, 405 flow [2025-03-09 01:26:30,638 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=397, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=405, PETRI_PLACES=84, PETRI_TRANSITIONS=88} [2025-03-09 01:26:30,638 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 6 predicate places. [2025-03-09 01:26:30,638 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 88 transitions, 405 flow [2025-03-09 01:26:30,638 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 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) [2025-03-09 01:26:30,638 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:26:30,638 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:26:30,638 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-03-09 01:26:30,638 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-03-09 01:26:30,639 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:26:30,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1596043264, now seen corresponding path program 1 times [2025-03-09 01:26:30,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:26:30,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407655581] [2025-03-09 01:26:30,639 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:26:30,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:26:30,644 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-09 01:26:30,651 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-09 01:26:30,651 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:26:30,651 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:26:30,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:26:30,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:26:30,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407655581] [2025-03-09 01:26:30,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407655581] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:26:30,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:26:30,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-09 01:26:30,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146393465] [2025-03-09 01:26:30,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:26:30,699 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-09 01:26:30,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:26:30,699 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-09 01:26:30,699 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-09 01:26:30,707 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 77 [2025-03-09 01:26:30,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 88 transitions, 405 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) [2025-03-09 01:26:30,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:26:30,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 77 [2025-03-09 01:26:30,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:26:35,393 INFO L124 PetriNetUnfolderBase]: 56946/77963 cut-off events. [2025-03-09 01:26:35,393 INFO L125 PetriNetUnfolderBase]: For 9827/9827 co-relation queries the response was YES. [2025-03-09 01:26:35,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175910 conditions, 77963 events. 56946/77963 cut-off events. For 9827/9827 co-relation queries the response was YES. Maximal size of possible extension queue 2980. Compared 546386 event pairs, 49573 based on Foata normal form. 1649/58872 useless extension candidates. Maximal degree in co-relation 127606. Up to 63686 conditions per place. [2025-03-09 01:26:35,806 INFO L140 encePairwiseOnDemand]: 65/77 looper letters, 112 selfloop transitions, 10 changer transitions 0/131 dead transitions. [2025-03-09 01:26:35,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 131 transitions, 826 flow [2025-03-09 01:26:35,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-09 01:26:35,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-09 01:26:35,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 198 transitions. [2025-03-09 01:26:35,807 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5142857142857142 [2025-03-09 01:26:35,807 INFO L175 Difference]: Start difference. First operand has 84 places, 88 transitions, 405 flow. Second operand 5 states and 198 transitions. [2025-03-09 01:26:35,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 131 transitions, 826 flow [2025-03-09 01:26:35,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 131 transitions, 818 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-09 01:26:35,826 INFO L231 Difference]: Finished difference. Result has 88 places, 92 transitions, 491 flow [2025-03-09 01:26:35,826 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=400, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=491, PETRI_PLACES=88, PETRI_TRANSITIONS=92} [2025-03-09 01:26:35,827 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 10 predicate places. [2025-03-09 01:26:35,827 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 92 transitions, 491 flow [2025-03-09 01:26:35,827 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) [2025-03-09 01:26:35,827 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:26:35,827 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:26:35,827 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-03-09 01:26:35,827 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-03-09 01:26:35,827 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:26:35,828 INFO L85 PathProgramCache]: Analyzing trace with hash 2141730874, now seen corresponding path program 1 times [2025-03-09 01:26:35,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:26:35,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368605918] [2025-03-09 01:26:35,828 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:26:35,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:26:35,836 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-09 01:26:35,843 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-09 01:26:35,844 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:26:35,844 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:26:35,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-09 01:26:35,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:26:35,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368605918] [2025-03-09 01:26:35,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368605918] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:26:35,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:26:35,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-09 01:26:35,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293655144] [2025-03-09 01:26:35,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:26:35,946 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-09 01:26:35,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:26:35,947 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-09 01:26:35,947 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-09 01:26:35,955 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 77 [2025-03-09 01:26:35,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 92 transitions, 491 flow. Second operand has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 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) [2025-03-09 01:26:35,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:26:35,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 77 [2025-03-09 01:26:35,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand