./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-more-buffer-mult2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c00e63dc Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/popl20-more-buffer-mult2.wvr.c -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/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 dbff9cba9b3794b18d55ca52c1abf6279404a7b220f91d79730a04b586f9ee44 --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-06 13:08:06,879 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-06 13:08:06,937 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-02-06 13:08:06,943 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-06 13:08:06,946 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-06 13:08:06,971 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-06 13:08:06,971 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-06 13:08:06,971 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-06 13:08:06,972 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-06 13:08:06,972 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-06 13:08:06,972 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-06 13:08:06,972 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-06 13:08:06,972 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-06 13:08:06,973 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-06 13:08:06,973 INFO L153 SettingsManager]: * Use SBE=true [2025-02-06 13:08:06,973 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-06 13:08:06,973 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-06 13:08:06,973 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-06 13:08:06,973 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-06 13:08:06,974 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-06 13:08:06,974 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-02-06 13:08:06,974 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-02-06 13:08:06,975 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-02-06 13:08:06,975 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-06 13:08:06,975 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-02-06 13:08:06,975 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-06 13:08:06,975 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-06 13:08:06,975 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-06 13:08:06,975 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-06 13:08:06,975 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-06 13:08:06,975 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-06 13:08:06,975 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-06 13:08:06,975 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-06 13:08:06,975 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 13:08:06,975 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-06 13:08:06,976 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-06 13:08:06,976 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-06 13:08:06,976 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-06 13:08:06,976 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-06 13:08:06,976 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-06 13:08:06,976 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-06 13:08:06,976 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-06 13:08:06,976 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-jdk21/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 -> dbff9cba9b3794b18d55ca52c1abf6279404a7b220f91d79730a04b586f9ee44 [2025-02-06 13:08:07,204 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-06 13:08:07,218 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-06 13:08:07,224 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-06 13:08:07,225 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-06 13:08:07,225 INFO L274 PluginConnector]: CDTParser initialized [2025-02-06 13:08:07,226 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-buffer-mult2.wvr.c [2025-02-06 13:08:08,435 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/0a4a0d23c/2e095111723e4d009a6212c6e56bfe0a/FLAGac837dae6 [2025-02-06 13:08:08,670 INFO L384 CDTParser]: Found 1 translation units. [2025-02-06 13:08:08,670 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-buffer-mult2.wvr.c [2025-02-06 13:08:08,677 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/0a4a0d23c/2e095111723e4d009a6212c6e56bfe0a/FLAGac837dae6 [2025-02-06 13:08:09,006 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/0a4a0d23c/2e095111723e4d009a6212c6e56bfe0a [2025-02-06 13:08:09,008 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-06 13:08:09,010 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-06 13:08:09,011 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-06 13:08:09,011 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-06 13:08:09,014 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-06 13:08:09,015 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 01:08:09" (1/1) ... [2025-02-06 13:08:09,015 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16f81472 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:08:09, skipping insertion in model container [2025-02-06 13:08:09,017 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 01:08:09" (1/1) ... [2025-02-06 13:08:09,033 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-06 13:08:09,174 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-02-06 13:08:09,181 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 13:08:09,195 INFO L200 MainTranslator]: Completed pre-run [2025-02-06 13:08:09,222 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 13:08:09,236 INFO L204 MainTranslator]: Completed translation [2025-02-06 13:08:09,237 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:08:09 WrapperNode [2025-02-06 13:08:09,237 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-06 13:08:09,238 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-06 13:08:09,238 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-06 13:08:09,238 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-06 13:08:09,242 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:08:09" (1/1) ... [2025-02-06 13:08:09,248 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:08:09" (1/1) ... [2025-02-06 13:08:09,270 INFO L138 Inliner]: procedures = 26, calls = 57, calls flagged for inlining = 19, calls inlined = 23, statements flattened = 276 [2025-02-06 13:08:09,270 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-06 13:08:09,271 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-06 13:08:09,271 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-06 13:08:09,271 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-06 13:08:09,282 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:08:09" (1/1) ... [2025-02-06 13:08:09,282 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:08:09" (1/1) ... [2025-02-06 13:08:09,285 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:08:09" (1/1) ... [2025-02-06 13:08:09,301 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2025-02-06 13:08:09,301 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:08:09" (1/1) ... [2025-02-06 13:08:09,301 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:08:09" (1/1) ... [2025-02-06 13:08:09,307 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:08:09" (1/1) ... [2025-02-06 13:08:09,308 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:08:09" (1/1) ... [2025-02-06 13:08:09,314 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:08:09" (1/1) ... [2025-02-06 13:08:09,315 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:08:09" (1/1) ... [2025-02-06 13:08:09,316 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-06 13:08:09,317 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-06 13:08:09,317 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-06 13:08:09,317 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-06 13:08:09,318 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:08:09" (1/1) ... [2025-02-06 13:08:09,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 13:08:09,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:08:09,347 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-06 13:08:09,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-06 13:08:09,368 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-06 13:08:09,368 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-06 13:08:09,368 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-06 13:08:09,368 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-06 13:08:09,368 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-06 13:08:09,369 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-02-06 13:08:09,369 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-02-06 13:08:09,369 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-02-06 13:08:09,369 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-02-06 13:08:09,369 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-02-06 13:08:09,369 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-02-06 13:08:09,369 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2025-02-06 13:08:09,369 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2025-02-06 13:08:09,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-06 13:08:09,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-06 13:08:09,370 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-02-06 13:08:09,370 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-02-06 13:08:09,370 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-06 13:08:09,370 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-06 13:08:09,370 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-06 13:08:09,371 WARN L227 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-02-06 13:08:09,447 INFO L257 CfgBuilder]: Building ICFG [2025-02-06 13:08:09,448 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-06 13:08:09,801 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-06 13:08:09,803 INFO L308 CfgBuilder]: Performing block encoding [2025-02-06 13:08:10,064 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-06 13:08:10,065 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-06 13:08:10,065 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 01:08:10 BoogieIcfgContainer [2025-02-06 13:08:10,065 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-06 13:08:10,067 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-06 13:08:10,067 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-06 13:08:10,071 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-06 13:08:10,071 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.02 01:08:09" (1/3) ... [2025-02-06 13:08:10,071 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@399c28bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 01:08:10, skipping insertion in model container [2025-02-06 13:08:10,072 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:08:09" (2/3) ... [2025-02-06 13:08:10,072 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@399c28bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 01:08:10, skipping insertion in model container [2025-02-06 13:08:10,072 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 01:08:10" (3/3) ... [2025-02-06 13:08:10,073 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-mult2.wvr.c [2025-02-06 13:08:10,084 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-06 13:08:10,086 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-buffer-mult2.wvr.c that has 5 procedures, 59 locations, 1 initial locations, 6 loop locations, and 14 error locations. [2025-02-06 13:08:10,086 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-06 13:08:10,174 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2025-02-06 13:08:10,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 71 places, 64 transitions, 156 flow [2025-02-06 13:08:10,246 INFO L124 PetriNetUnfolderBase]: 6/60 cut-off events. [2025-02-06 13:08:10,251 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-02-06 13:08:10,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77 conditions, 60 events. 6/60 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 122 event pairs, 0 based on Foata normal form. 0/40 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2025-02-06 13:08:10,254 INFO L82 GeneralOperation]: Start removeDead. Operand has 71 places, 64 transitions, 156 flow [2025-02-06 13:08:10,256 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 59 transitions, 142 flow [2025-02-06 13:08:10,261 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-06 13:08:10,268 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;@294f94e9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-06 13:08:10,268 INFO L334 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2025-02-06 13:08:10,270 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-06 13:08:10,270 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-02-06 13:08:10,270 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-06 13:08:10,270 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:08:10,271 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-06 13:08:10,271 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-02-06 13:08:10,274 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:08:10,275 INFO L85 PathProgramCache]: Analyzing trace with hash 766275, now seen corresponding path program 1 times [2025-02-06 13:08:10,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:08:10,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330100696] [2025-02-06 13:08:10,280 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:08:10,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:08:10,333 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-06 13:08:10,346 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-06 13:08:10,346 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:10,346 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:10,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:08:10,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:08:10,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330100696] [2025-02-06 13:08:10,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330100696] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:08:10,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:08:10,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-02-06 13:08:10,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504703560] [2025-02-06 13:08:10,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:08:10,453 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 13:08:10,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:08:10,475 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 13:08:10,475 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 13:08:10,494 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 64 [2025-02-06 13:08:10,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 59 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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) [2025-02-06 13:08:10,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:08:10,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 64 [2025-02-06 13:08:10,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:08:11,946 INFO L124 PetriNetUnfolderBase]: 11253/15061 cut-off events. [2025-02-06 13:08:11,946 INFO L125 PetriNetUnfolderBase]: For 464/464 co-relation queries the response was YES. [2025-02-06 13:08:11,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30470 conditions, 15061 events. 11253/15061 cut-off events. For 464/464 co-relation queries the response was YES. Maximal size of possible extension queue 839. Compared 86463 event pairs, 9160 based on Foata normal form. 1/10403 useless extension candidates. Maximal degree in co-relation 28212. Up to 14621 conditions per place. [2025-02-06 13:08:12,048 INFO L140 encePairwiseOnDemand]: 59/64 looper letters, 42 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2025-02-06 13:08:12,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 55 transitions, 222 flow [2025-02-06 13:08:12,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 13:08:12,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 13:08:12,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2025-02-06 13:08:12,058 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4947916666666667 [2025-02-06 13:08:12,059 INFO L175 Difference]: Start difference. First operand has 66 places, 59 transitions, 142 flow. Second operand 3 states and 95 transitions. [2025-02-06 13:08:12,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 55 transitions, 222 flow [2025-02-06 13:08:12,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 55 transitions, 206 flow, removed 0 selfloop flow, removed 8 redundant places. [2025-02-06 13:08:12,078 INFO L231 Difference]: Finished difference. Result has 56 places, 55 transitions, 122 flow [2025-02-06 13:08:12,080 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=56, PETRI_TRANSITIONS=55} [2025-02-06 13:08:12,083 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, -10 predicate places. [2025-02-06 13:08:12,083 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 55 transitions, 122 flow [2025-02-06 13:08:12,083 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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) [2025-02-06 13:08:12,083 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:08:12,083 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-06 13:08:12,084 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-06 13:08:12,084 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-02-06 13:08:12,084 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:08:12,084 INFO L85 PathProgramCache]: Analyzing trace with hash 766276, now seen corresponding path program 1 times [2025-02-06 13:08:12,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:08:12,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331571130] [2025-02-06 13:08:12,085 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:08:12,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:08:12,095 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-06 13:08:12,109 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-06 13:08:12,109 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:12,109 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:12,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:08:12,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:08:12,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331571130] [2025-02-06 13:08:12,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331571130] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:08:12,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:08:12,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 13:08:12,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098034528] [2025-02-06 13:08:12,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:08:12,381 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:08:12,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:08:12,382 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:08:12,382 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:08:12,399 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 64 [2025-02-06 13:08:12,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 55 transitions, 122 flow. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 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) [2025-02-06 13:08:12,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:08:12,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 64 [2025-02-06 13:08:12,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:08:13,332 INFO L124 PetriNetUnfolderBase]: 11254/15064 cut-off events. [2025-02-06 13:08:13,333 INFO L125 PetriNetUnfolderBase]: For 66/66 co-relation queries the response was YES. [2025-02-06 13:08:13,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29959 conditions, 15064 events. 11254/15064 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 839. Compared 86479 event pairs, 9160 based on Foata normal form. 0/10403 useless extension candidates. Maximal degree in co-relation 29930. Up to 14630 conditions per place. [2025-02-06 13:08:13,421 INFO L140 encePairwiseOnDemand]: 59/64 looper letters, 45 selfloop transitions, 4 changer transitions 0/58 dead transitions. [2025-02-06 13:08:13,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 58 transitions, 226 flow [2025-02-06 13:08:13,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:08:13,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:08:13,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 114 transitions. [2025-02-06 13:08:13,423 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4453125 [2025-02-06 13:08:13,423 INFO L175 Difference]: Start difference. First operand has 56 places, 55 transitions, 122 flow. Second operand 4 states and 114 transitions. [2025-02-06 13:08:13,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 58 transitions, 226 flow [2025-02-06 13:08:13,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 58 transitions, 222 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:08:13,424 INFO L231 Difference]: Finished difference. Result has 59 places, 58 transitions, 145 flow [2025-02-06 13:08:13,425 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=145, PETRI_PLACES=59, PETRI_TRANSITIONS=58} [2025-02-06 13:08:13,425 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, -7 predicate places. [2025-02-06 13:08:13,425 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 58 transitions, 145 flow [2025-02-06 13:08:13,425 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 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) [2025-02-06 13:08:13,425 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:08:13,425 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2025-02-06 13:08:13,427 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-06 13:08:13,427 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-02-06 13:08:13,427 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:08:13,427 INFO L85 PathProgramCache]: Analyzing trace with hash 23755538, now seen corresponding path program 1 times [2025-02-06 13:08:13,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:08:13,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302773531] [2025-02-06 13:08:13,428 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:08:13,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:08:13,441 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-02-06 13:08:13,457 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-02-06 13:08:13,459 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:13,459 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:13,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:08:13,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:08:13,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302773531] [2025-02-06 13:08:13,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302773531] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:08:13,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:08:13,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 13:08:13,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062620369] [2025-02-06 13:08:13,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:08:13,689 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:08:13,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:08:13,690 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:08:13,690 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-06 13:08:13,715 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 64 [2025-02-06 13:08:13,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 58 transitions, 145 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:08:13,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:08:13,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 64 [2025-02-06 13:08:13,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:08:14,629 INFO L124 PetriNetUnfolderBase]: 11255/15067 cut-off events. [2025-02-06 13:08:14,630 INFO L125 PetriNetUnfolderBase]: For 66/66 co-relation queries the response was YES. [2025-02-06 13:08:14,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29976 conditions, 15067 events. 11255/15067 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 839. Compared 86499 event pairs, 9160 based on Foata normal form. 0/10405 useless extension candidates. Maximal degree in co-relation 29951. Up to 14629 conditions per place. [2025-02-06 13:08:14,685 INFO L140 encePairwiseOnDemand]: 56/64 looper letters, 45 selfloop transitions, 7 changer transitions 0/61 dead transitions. [2025-02-06 13:08:14,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 61 transitions, 255 flow [2025-02-06 13:08:14,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:08:14,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:08:14,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 133 transitions. [2025-02-06 13:08:14,688 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.415625 [2025-02-06 13:08:14,689 INFO L175 Difference]: Start difference. First operand has 59 places, 58 transitions, 145 flow. Second operand 5 states and 133 transitions. [2025-02-06 13:08:14,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 61 transitions, 255 flow [2025-02-06 13:08:14,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 61 transitions, 252 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 13:08:14,691 INFO L231 Difference]: Finished difference. Result has 64 places, 61 transitions, 179 flow [2025-02-06 13:08:14,691 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=179, PETRI_PLACES=64, PETRI_TRANSITIONS=61} [2025-02-06 13:08:14,692 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, -2 predicate places. [2025-02-06 13:08:14,692 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 61 transitions, 179 flow [2025-02-06 13:08:14,692 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:08:14,693 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:08:14,693 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2025-02-06 13:08:14,693 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-02-06 13:08:14,693 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-02-06 13:08:14,693 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:08:14,694 INFO L85 PathProgramCache]: Analyzing trace with hash 736414659, now seen corresponding path program 1 times [2025-02-06 13:08:14,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:08:14,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066083721] [2025-02-06 13:08:14,694 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:08:14,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:08:14,700 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-06 13:08:14,712 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-06 13:08:14,715 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:14,715 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:14,905 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:08:14,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:08:14,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066083721] [2025-02-06 13:08:14,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066083721] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:08:14,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508295930] [2025-02-06 13:08:14,906 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:08:14,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:08:14,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:08:14,911 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:08:14,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-06 13:08:14,977 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-06 13:08:14,987 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-06 13:08:14,987 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:14,987 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:14,989 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-06 13:08:14,994 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:08:15,037 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 [2025-02-06 13:08:15,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:08:15,214 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:08:15,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:08:15,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508295930] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:08:15,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:08:15,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2025-02-06 13:08:15,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349697698] [2025-02-06 13:08:15,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:08:15,343 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-06 13:08:15,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:08:15,343 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-06 13:08:15,343 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2025-02-06 13:08:15,393 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 64 [2025-02-06 13:08:15,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 61 transitions, 179 flow. Second operand has 11 states, 11 states have (on average 17.363636363636363) internal successors, (191), 11 states have internal predecessors, (191), 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) [2025-02-06 13:08:15,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:08:15,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 64 [2025-02-06 13:08:15,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:08:16,379 INFO L124 PetriNetUnfolderBase]: 11255/15066 cut-off events. [2025-02-06 13:08:16,379 INFO L125 PetriNetUnfolderBase]: For 69/69 co-relation queries the response was YES. [2025-02-06 13:08:16,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29989 conditions, 15066 events. 11255/15066 cut-off events. For 69/69 co-relation queries the response was YES. Maximal size of possible extension queue 839. Compared 86429 event pairs, 9160 based on Foata normal form. 0/10407 useless extension candidates. Maximal degree in co-relation 29961. Up to 14629 conditions per place. [2025-02-06 13:08:16,442 INFO L140 encePairwiseOnDemand]: 59/64 looper letters, 44 selfloop transitions, 7 changer transitions 0/60 dead transitions. [2025-02-06 13:08:16,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 60 transitions, 277 flow [2025-02-06 13:08:16,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 13:08:16,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-06 13:08:16,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2025-02-06 13:08:16,445 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3776041666666667 [2025-02-06 13:08:16,445 INFO L175 Difference]: Start difference. First operand has 64 places, 61 transitions, 179 flow. Second operand 6 states and 145 transitions. [2025-02-06 13:08:16,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 60 transitions, 277 flow [2025-02-06 13:08:16,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 60 transitions, 276 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 13:08:16,448 INFO L231 Difference]: Finished difference. Result has 67 places, 60 transitions, 188 flow [2025-02-06 13:08:16,448 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=188, PETRI_PLACES=67, PETRI_TRANSITIONS=60} [2025-02-06 13:08:16,449 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 1 predicate places. [2025-02-06 13:08:16,449 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 60 transitions, 188 flow [2025-02-06 13:08:16,450 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 17.363636363636363) internal successors, (191), 11 states have internal predecessors, (191), 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) [2025-02-06 13:08:16,450 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:08:16,450 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2025-02-06 13:08:16,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-02-06 13:08:16,650 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:08:16,651 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-02-06 13:08:16,651 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:08:16,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1354259181, now seen corresponding path program 1 times [2025-02-06 13:08:16,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:08:16,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742716476] [2025-02-06 13:08:16,652 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:08:16,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:08:16,659 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-06 13:08:16,669 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-06 13:08:16,672 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:16,673 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:16,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:08:16,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:08:16,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742716476] [2025-02-06 13:08:16,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742716476] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:08:16,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17222874] [2025-02-06 13:08:16,885 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:08:16,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:08:16,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:08:16,889 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:08:16,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-06 13:08:16,937 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-06 13:08:16,951 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-06 13:08:16,952 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:16,952 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:16,953 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-06 13:08:16,954 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:08:16,972 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 [2025-02-06 13:08:17,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:08:17,115 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:08:17,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:08:17,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17222874] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:08:17,244 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:08:17,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2025-02-06 13:08:17,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682192134] [2025-02-06 13:08:17,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:08:17,245 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-06 13:08:17,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:08:17,245 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-06 13:08:17,245 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2025-02-06 13:08:17,299 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 64 [2025-02-06 13:08:17,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 60 transitions, 188 flow. Second operand has 13 states, 13 states have (on average 17.307692307692307) internal successors, (225), 13 states have internal predecessors, (225), 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) [2025-02-06 13:08:17,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:08:17,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 64 [2025-02-06 13:08:17,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:08:18,446 INFO L124 PetriNetUnfolderBase]: 11257/15071 cut-off events. [2025-02-06 13:08:18,446 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2025-02-06 13:08:18,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30015 conditions, 15071 events. 11257/15071 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 839. Compared 86581 event pairs, 9160 based on Foata normal form. 0/10412 useless extension candidates. Maximal degree in co-relation 29969. Up to 14622 conditions per place. [2025-02-06 13:08:18,527 INFO L140 encePairwiseOnDemand]: 56/64 looper letters, 38 selfloop transitions, 18 changer transitions 0/65 dead transitions. [2025-02-06 13:08:18,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 65 transitions, 329 flow [2025-02-06 13:08:18,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-06 13:08:18,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-06 13:08:18,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 202 transitions. [2025-02-06 13:08:18,528 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3506944444444444 [2025-02-06 13:08:18,528 INFO L175 Difference]: Start difference. First operand has 67 places, 60 transitions, 188 flow. Second operand 9 states and 202 transitions. [2025-02-06 13:08:18,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 65 transitions, 329 flow [2025-02-06 13:08:18,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 65 transitions, 282 flow, removed 6 selfloop flow, removed 8 redundant places. [2025-02-06 13:08:18,530 INFO L231 Difference]: Finished difference. Result has 66 places, 65 transitions, 206 flow [2025-02-06 13:08:18,530 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=206, PETRI_PLACES=66, PETRI_TRANSITIONS=65} [2025-02-06 13:08:18,531 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 0 predicate places. [2025-02-06 13:08:18,531 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 65 transitions, 206 flow [2025-02-06 13:08:18,531 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 17.307692307692307) internal successors, (225), 13 states have internal predecessors, (225), 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) [2025-02-06 13:08:18,531 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:08:18,531 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:08:18,540 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-02-06 13:08:18,732 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:08:18,732 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-02-06 13:08:18,733 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:08:18,733 INFO L85 PathProgramCache]: Analyzing trace with hash 145094952, now seen corresponding path program 1 times [2025-02-06 13:08:18,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:08:18,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204975825] [2025-02-06 13:08:18,736 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:08:18,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:08:18,741 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-06 13:08:18,745 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-06 13:08:18,745 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:18,745 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:18,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:08:18,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:08:18,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204975825] [2025-02-06 13:08:18,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204975825] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:08:18,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:08:18,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 13:08:18,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295925895] [2025-02-06 13:08:18,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:08:18,789 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:08:18,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:08:18,789 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:08:18,790 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:08:18,793 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 64 [2025-02-06 13:08:18,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 65 transitions, 206 flow. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:08:18,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:08:18,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 64 [2025-02-06 13:08:18,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:08:19,553 INFO L124 PetriNetUnfolderBase]: 13736/18598 cut-off events. [2025-02-06 13:08:19,553 INFO L125 PetriNetUnfolderBase]: For 88/88 co-relation queries the response was YES. [2025-02-06 13:08:19,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37047 conditions, 18598 events. 13736/18598 cut-off events. For 88/88 co-relation queries the response was YES. Maximal size of possible extension queue 981. Compared 110185 event pairs, 11357 based on Foata normal form. 541/14023 useless extension candidates. Maximal degree in co-relation 29954. Up to 14636 conditions per place. [2025-02-06 13:08:19,641 INFO L140 encePairwiseOnDemand]: 55/64 looper letters, 91 selfloop transitions, 3 changer transitions 0/103 dead transitions. [2025-02-06 13:08:19,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 103 transitions, 516 flow [2025-02-06 13:08:19,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:08:19,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:08:19,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 157 transitions. [2025-02-06 13:08:19,642 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.61328125 [2025-02-06 13:08:19,642 INFO L175 Difference]: Start difference. First operand has 66 places, 65 transitions, 206 flow. Second operand 4 states and 157 transitions. [2025-02-06 13:08:19,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 103 transitions, 516 flow [2025-02-06 13:08:19,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 103 transitions, 463 flow, removed 12 selfloop flow, removed 5 redundant places. [2025-02-06 13:08:19,644 INFO L231 Difference]: Finished difference. Result has 65 places, 65 transitions, 192 flow [2025-02-06 13:08:19,644 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=192, PETRI_PLACES=65, PETRI_TRANSITIONS=65} [2025-02-06 13:08:19,645 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, -1 predicate places. [2025-02-06 13:08:19,645 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 65 transitions, 192 flow [2025-02-06 13:08:19,645 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:08:19,645 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:08:19,645 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:08:19,645 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-02-06 13:08:19,645 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-02-06 13:08:19,645 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:08:19,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1826318839, now seen corresponding path program 1 times [2025-02-06 13:08:19,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:08:19,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760966511] [2025-02-06 13:08:19,646 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:08:19,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:08:19,650 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-06 13:08:19,660 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-06 13:08:19,660 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:19,660 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:19,735 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:08:19,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:08:19,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760966511] [2025-02-06 13:08:19,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760966511] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:08:19,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:08:19,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 13:08:19,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026549505] [2025-02-06 13:08:19,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:08:19,736 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:08:19,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:08:19,736 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:08:19,736 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:08:19,744 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 64 [2025-02-06 13:08:19,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 65 transitions, 192 flow. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 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) [2025-02-06 13:08:19,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:08:19,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 64 [2025-02-06 13:08:19,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:08:20,304 INFO L124 PetriNetUnfolderBase]: 10422/14172 cut-off events. [2025-02-06 13:08:20,305 INFO L125 PetriNetUnfolderBase]: For 994/994 co-relation queries the response was YES. [2025-02-06 13:08:20,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30022 conditions, 14172 events. 10422/14172 cut-off events. For 994/994 co-relation queries the response was YES. Maximal size of possible extension queue 708. Compared 81726 event pairs, 8512 based on Foata normal form. 0/10809 useless extension candidates. Maximal degree in co-relation 22974. Up to 13740 conditions per place. [2025-02-06 13:08:20,361 INFO L140 encePairwiseOnDemand]: 59/64 looper letters, 47 selfloop transitions, 7 changer transitions 0/63 dead transitions. [2025-02-06 13:08:20,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 63 transitions, 292 flow [2025-02-06 13:08:20,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:08:20,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:08:20,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2025-02-06 13:08:20,362 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3875 [2025-02-06 13:08:20,362 INFO L175 Difference]: Start difference. First operand has 65 places, 65 transitions, 192 flow. Second operand 5 states and 124 transitions. [2025-02-06 13:08:20,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 63 transitions, 292 flow [2025-02-06 13:08:20,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 63 transitions, 287 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:08:20,364 INFO L231 Difference]: Finished difference. Result has 65 places, 63 transitions, 193 flow [2025-02-06 13:08:20,365 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=179, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=193, PETRI_PLACES=65, PETRI_TRANSITIONS=63} [2025-02-06 13:08:20,365 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, -1 predicate places. [2025-02-06 13:08:20,365 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 63 transitions, 193 flow [2025-02-06 13:08:20,365 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 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) [2025-02-06 13:08:20,365 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:08:20,365 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:08:20,365 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-02-06 13:08:20,366 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-02-06 13:08:20,366 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:08:20,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1343650501, now seen corresponding path program 1 times [2025-02-06 13:08:20,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:08:20,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261795234] [2025-02-06 13:08:20,366 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:08:20,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:08:20,370 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-06 13:08:20,373 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-06 13:08:20,374 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:20,374 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:20,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:08:20,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:08:20,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261795234] [2025-02-06 13:08:20,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261795234] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:08:20,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:08:20,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 13:08:20,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751577926] [2025-02-06 13:08:20,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:08:20,413 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:08:20,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:08:20,413 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:08:20,413 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:08:20,418 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 64 [2025-02-06 13:08:20,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 63 transitions, 193 flow. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 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) [2025-02-06 13:08:20,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:08:20,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 64 [2025-02-06 13:08:20,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:08:20,818 INFO L124 PetriNetUnfolderBase]: 7444/10196 cut-off events. [2025-02-06 13:08:20,819 INFO L125 PetriNetUnfolderBase]: For 714/714 co-relation queries the response was YES. [2025-02-06 13:08:20,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21596 conditions, 10196 events. 7444/10196 cut-off events. For 714/714 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 56393 event pairs, 5940 based on Foata normal form. 0/8326 useless extension candidates. Maximal degree in co-relation 16457. Up to 9832 conditions per place. [2025-02-06 13:08:20,863 INFO L140 encePairwiseOnDemand]: 60/64 looper letters, 48 selfloop transitions, 4 changer transitions 0/61 dead transitions. [2025-02-06 13:08:20,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 61 transitions, 293 flow [2025-02-06 13:08:20,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:08:20,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:08:20,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 106 transitions. [2025-02-06 13:08:20,865 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4140625 [2025-02-06 13:08:20,865 INFO L175 Difference]: Start difference. First operand has 65 places, 63 transitions, 193 flow. Second operand 4 states and 106 transitions. [2025-02-06 13:08:20,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 61 transitions, 293 flow [2025-02-06 13:08:20,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 61 transitions, 282 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-06 13:08:20,867 INFO L231 Difference]: Finished difference. Result has 63 places, 61 transitions, 186 flow [2025-02-06 13:08:20,867 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=186, PETRI_PLACES=63, PETRI_TRANSITIONS=61} [2025-02-06 13:08:20,868 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, -3 predicate places. [2025-02-06 13:08:20,868 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 61 transitions, 186 flow [2025-02-06 13:08:20,868 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 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) [2025-02-06 13:08:20,868 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:08:20,868 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:08:20,868 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-02-06 13:08:20,868 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-02-06 13:08:20,868 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:08:20,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1343650502, now seen corresponding path program 1 times [2025-02-06 13:08:20,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:08:20,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223765870] [2025-02-06 13:08:20,869 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:08:20,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:08:20,873 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-06 13:08:20,877 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-06 13:08:20,877 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:20,877 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:20,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:08:20,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:08:20,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223765870] [2025-02-06 13:08:20,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223765870] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:08:20,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:08:20,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 13:08:20,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354181940] [2025-02-06 13:08:20,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:08:20,992 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:08:20,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:08:20,993 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:08:20,993 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:08:20,997 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 64 [2025-02-06 13:08:20,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 61 transitions, 186 flow. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:08:20,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:08:20,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 64 [2025-02-06 13:08:20,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:08:21,576 INFO L124 PetriNetUnfolderBase]: 9866/13812 cut-off events. [2025-02-06 13:08:21,577 INFO L125 PetriNetUnfolderBase]: For 967/967 co-relation queries the response was YES. [2025-02-06 13:08:21,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29281 conditions, 13812 events. 9866/13812 cut-off events. For 967/967 co-relation queries the response was YES. Maximal size of possible extension queue 653. Compared 82058 event pairs, 8104 based on Foata normal form. 440/12376 useless extension candidates. Maximal degree in co-relation 16457. Up to 9848 conditions per place. [2025-02-06 13:08:21,642 INFO L140 encePairwiseOnDemand]: 57/64 looper letters, 74 selfloop transitions, 5 changer transitions 0/88 dead transitions. [2025-02-06 13:08:21,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 88 transitions, 414 flow [2025-02-06 13:08:21,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:08:21,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:08:21,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 146 transitions. [2025-02-06 13:08:21,643 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5703125 [2025-02-06 13:08:21,644 INFO L175 Difference]: Start difference. First operand has 63 places, 61 transitions, 186 flow. Second operand 4 states and 146 transitions. [2025-02-06 13:08:21,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 88 transitions, 414 flow [2025-02-06 13:08:21,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 88 transitions, 409 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:08:21,647 INFO L231 Difference]: Finished difference. Result has 65 places, 61 transitions, 200 flow [2025-02-06 13:08:21,647 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=200, PETRI_PLACES=65, PETRI_TRANSITIONS=61} [2025-02-06 13:08:21,648 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, -1 predicate places. [2025-02-06 13:08:21,648 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 61 transitions, 200 flow [2025-02-06 13:08:21,648 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:08:21,648 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:08:21,648 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:08:21,648 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-02-06 13:08:21,648 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-02-06 13:08:21,648 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:08:21,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1826318838, now seen corresponding path program 1 times [2025-02-06 13:08:21,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:08:21,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708185517] [2025-02-06 13:08:21,649 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:08:21,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:08:21,656 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-06 13:08:21,661 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-06 13:08:21,663 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:21,663 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:21,836 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:08:21,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:08:21,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708185517] [2025-02-06 13:08:21,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708185517] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:08:21,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:08:21,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 13:08:21,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602045495] [2025-02-06 13:08:21,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:08:21,837 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:08:21,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:08:21,838 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:08:21,838 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-06 13:08:21,850 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 64 [2025-02-06 13:08:21,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 61 transitions, 200 flow. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 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) [2025-02-06 13:08:21,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:08:21,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 64 [2025-02-06 13:08:21,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:08:22,302 INFO L124 PetriNetUnfolderBase]: 7273/10257 cut-off events. [2025-02-06 13:08:22,302 INFO L125 PetriNetUnfolderBase]: For 1445/1445 co-relation queries the response was YES. [2025-02-06 13:08:22,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22456 conditions, 10257 events. 7273/10257 cut-off events. For 1445/1445 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 59027 event pairs, 5890 based on Foata normal form. 0/9244 useless extension candidates. Maximal degree in co-relation 11318. Up to 9846 conditions per place. [2025-02-06 13:08:22,339 INFO L140 encePairwiseOnDemand]: 60/64 looper letters, 46 selfloop transitions, 4 changer transitions 0/59 dead transitions. [2025-02-06 13:08:22,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 59 transitions, 292 flow [2025-02-06 13:08:22,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:08:22,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:08:22,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 104 transitions. [2025-02-06 13:08:22,340 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.40625 [2025-02-06 13:08:22,340 INFO L175 Difference]: Start difference. First operand has 65 places, 61 transitions, 200 flow. Second operand 4 states and 104 transitions. [2025-02-06 13:08:22,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 59 transitions, 292 flow [2025-02-06 13:08:22,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 59 transitions, 288 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 13:08:22,345 INFO L231 Difference]: Finished difference. Result has 65 places, 59 transitions, 196 flow [2025-02-06 13:08:22,345 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=196, PETRI_PLACES=65, PETRI_TRANSITIONS=59} [2025-02-06 13:08:22,345 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, -1 predicate places. [2025-02-06 13:08:22,345 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 59 transitions, 196 flow [2025-02-06 13:08:22,346 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 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) [2025-02-06 13:08:22,346 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:08:22,346 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:08:22,346 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-02-06 13:08:22,346 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-02-06 13:08:22,346 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:08:22,346 INFO L85 PathProgramCache]: Analyzing trace with hash 3525217, now seen corresponding path program 1 times [2025-02-06 13:08:22,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:08:22,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035353421] [2025-02-06 13:08:22,347 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:08:22,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:08:22,357 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-06 13:08:22,365 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-06 13:08:22,368 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:22,369 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:22,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:08:22,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:08:22,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035353421] [2025-02-06 13:08:22,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035353421] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:08:22,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60645786] [2025-02-06 13:08:22,517 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:08:22,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:08:22,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:08:22,521 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:08:22,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-06 13:08:22,572 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-06 13:08:22,586 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-06 13:08:22,586 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:22,586 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:22,587 INFO L256 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-06 13:08:22,588 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:08:22,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:08:22,641 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 13:08:22,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60645786] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:08:22,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-06 13:08:22,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2025-02-06 13:08:22,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674178556] [2025-02-06 13:08:22,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:08:22,641 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:08:22,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:08:22,642 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:08:22,642 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-02-06 13:08:22,651 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 64 [2025-02-06 13:08:22,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 59 transitions, 196 flow. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 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) [2025-02-06 13:08:22,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:08:22,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 64 [2025-02-06 13:08:22,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:08:22,979 INFO L124 PetriNetUnfolderBase]: 5447/7795 cut-off events. [2025-02-06 13:08:22,979 INFO L125 PetriNetUnfolderBase]: For 1154/1154 co-relation queries the response was YES. [2025-02-06 13:08:22,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16623 conditions, 7795 events. 5447/7795 cut-off events. For 1154/1154 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 44185 event pairs, 4350 based on Foata normal form. 0/7479 useless extension candidates. Maximal degree in co-relation 11183. Up to 7419 conditions per place. [2025-02-06 13:08:23,007 INFO L140 encePairwiseOnDemand]: 60/64 looper letters, 42 selfloop transitions, 6 changer transitions 0/57 dead transitions. [2025-02-06 13:08:23,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 57 transitions, 284 flow [2025-02-06 13:08:23,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:08:23,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:08:23,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 110 transitions. [2025-02-06 13:08:23,008 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4296875 [2025-02-06 13:08:23,008 INFO L175 Difference]: Start difference. First operand has 65 places, 59 transitions, 196 flow. Second operand 4 states and 110 transitions. [2025-02-06 13:08:23,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 57 transitions, 284 flow [2025-02-06 13:08:23,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 57 transitions, 279 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:08:23,010 INFO L231 Difference]: Finished difference. Result has 64 places, 57 transitions, 195 flow [2025-02-06 13:08:23,011 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=195, PETRI_PLACES=64, PETRI_TRANSITIONS=57} [2025-02-06 13:08:23,011 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, -2 predicate places. [2025-02-06 13:08:23,011 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 57 transitions, 195 flow [2025-02-06 13:08:23,011 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 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) [2025-02-06 13:08:23,011 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:08:23,011 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:08:23,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-02-06 13:08:23,216 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:08:23,216 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-02-06 13:08:23,217 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:08:23,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1443936286, now seen corresponding path program 1 times [2025-02-06 13:08:23,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:08:23,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89016618] [2025-02-06 13:08:23,217 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:08:23,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:08:23,222 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-02-06 13:08:23,226 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-02-06 13:08:23,226 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:23,226 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:23,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:08:23,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:08:23,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89016618] [2025-02-06 13:08:23,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89016618] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:08:23,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:08:23,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 13:08:23,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306986438] [2025-02-06 13:08:23,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:08:23,246 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 13:08:23,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:08:23,247 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 13:08:23,247 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 13:08:23,247 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 64 [2025-02-06 13:08:23,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 57 transitions, 195 flow. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:08:23,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:08:23,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 64 [2025-02-06 13:08:23,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:08:23,776 INFO L124 PetriNetUnfolderBase]: 7724/11151 cut-off events. [2025-02-06 13:08:23,777 INFO L125 PetriNetUnfolderBase]: For 1919/1919 co-relation queries the response was YES. [2025-02-06 13:08:23,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23789 conditions, 11151 events. 7724/11151 cut-off events. For 1919/1919 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 65506 event pairs, 3089 based on Foata normal form. 4/10887 useless extension candidates. Maximal degree in co-relation 16807. Up to 5496 conditions per place. [2025-02-06 13:08:23,814 INFO L140 encePairwiseOnDemand]: 60/64 looper letters, 65 selfloop transitions, 3 changer transitions 1/78 dead transitions. [2025-02-06 13:08:23,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 78 transitions, 388 flow [2025-02-06 13:08:23,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 13:08:23,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 13:08:23,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 112 transitions. [2025-02-06 13:08:23,815 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2025-02-06 13:08:23,815 INFO L175 Difference]: Start difference. First operand has 64 places, 57 transitions, 195 flow. Second operand 3 states and 112 transitions. [2025-02-06 13:08:23,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 78 transitions, 388 flow [2025-02-06 13:08:23,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 78 transitions, 379 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:08:23,819 INFO L231 Difference]: Finished difference. Result has 65 places, 59 transitions, 209 flow [2025-02-06 13:08:23,819 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=209, PETRI_PLACES=65, PETRI_TRANSITIONS=59} [2025-02-06 13:08:23,821 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, -1 predicate places. [2025-02-06 13:08:23,821 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 59 transitions, 209 flow [2025-02-06 13:08:23,821 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:08:23,821 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:08:23,821 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:08:23,821 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2025-02-06 13:08:23,821 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-02-06 13:08:23,822 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:08:23,822 INFO L85 PathProgramCache]: Analyzing trace with hash 623933665, now seen corresponding path program 1 times [2025-02-06 13:08:23,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:08:23,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365482074] [2025-02-06 13:08:23,822 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:08:23,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:08:23,831 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 34 statements into 1 equivalence classes. [2025-02-06 13:08:23,838 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 34 of 34 statements. [2025-02-06 13:08:23,838 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:23,838 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:23,903 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:08:23,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:08:23,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365482074] [2025-02-06 13:08:23,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365482074] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:08:23,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:08:23,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 13:08:23,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961398002] [2025-02-06 13:08:23,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:08:23,905 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 13:08:23,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:08:23,905 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 13:08:23,905 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 13:08:23,906 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 64 [2025-02-06 13:08:23,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 59 transitions, 209 flow. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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) [2025-02-06 13:08:23,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:08:23,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 64 [2025-02-06 13:08:23,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:08:24,755 INFO L124 PetriNetUnfolderBase]: 8953/13036 cut-off events. [2025-02-06 13:08:24,755 INFO L125 PetriNetUnfolderBase]: For 4875/4875 co-relation queries the response was YES. [2025-02-06 13:08:24,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29237 conditions, 13036 events. 8953/13036 cut-off events. For 4875/4875 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 79067 event pairs, 4404 based on Foata normal form. 261/13085 useless extension candidates. Maximal degree in co-relation 21995. Up to 6296 conditions per place. [2025-02-06 13:08:24,819 INFO L140 encePairwiseOnDemand]: 61/64 looper letters, 73 selfloop transitions, 2 changer transitions 0/84 dead transitions. [2025-02-06 13:08:24,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 84 transitions, 431 flow [2025-02-06 13:08:24,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 13:08:24,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 13:08:24,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 115 transitions. [2025-02-06 13:08:24,820 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5989583333333334 [2025-02-06 13:08:24,820 INFO L175 Difference]: Start difference. First operand has 65 places, 59 transitions, 209 flow. Second operand 3 states and 115 transitions. [2025-02-06 13:08:24,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 84 transitions, 431 flow [2025-02-06 13:08:24,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 84 transitions, 427 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 13:08:24,824 INFO L231 Difference]: Finished difference. Result has 67 places, 60 transitions, 222 flow [2025-02-06 13:08:24,824 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=222, PETRI_PLACES=67, PETRI_TRANSITIONS=60} [2025-02-06 13:08:24,825 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 1 predicate places. [2025-02-06 13:08:24,825 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 60 transitions, 222 flow [2025-02-06 13:08:24,825 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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) [2025-02-06 13:08:24,825 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:08:24,825 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:08:24,825 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2025-02-06 13:08:24,825 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-02-06 13:08:24,826 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:08:24,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1036480421, now seen corresponding path program 1 times [2025-02-06 13:08:24,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:08:24,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571897459] [2025-02-06 13:08:24,826 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:08:24,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:08:24,833 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 34 statements into 1 equivalence classes. [2025-02-06 13:08:24,838 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 34 of 34 statements. [2025-02-06 13:08:24,838 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:24,838 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:24,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:08:24,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:08:24,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571897459] [2025-02-06 13:08:24,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571897459] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:08:24,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:08:24,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 13:08:24,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825926894] [2025-02-06 13:08:24,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:08:24,879 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 13:08:24,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:08:24,880 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 13:08:24,880 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 13:08:24,880 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 64 [2025-02-06 13:08:24,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 60 transitions, 222 flow. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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) [2025-02-06 13:08:24,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:08:24,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 64 [2025-02-06 13:08:24,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:08:25,879 INFO L124 PetriNetUnfolderBase]: 10319/15161 cut-off events. [2025-02-06 13:08:25,879 INFO L125 PetriNetUnfolderBase]: For 8478/8478 co-relation queries the response was YES. [2025-02-06 13:08:25,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34943 conditions, 15161 events. 10319/15161 cut-off events. For 8478/8478 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 92765 event pairs, 5083 based on Foata normal form. 193/15179 useless extension candidates. Maximal degree in co-relation 27000. Up to 7410 conditions per place. [2025-02-06 13:08:25,948 INFO L140 encePairwiseOnDemand]: 61/64 looper letters, 73 selfloop transitions, 2 changer transitions 0/84 dead transitions. [2025-02-06 13:08:25,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 84 transitions, 451 flow [2025-02-06 13:08:25,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 13:08:25,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 13:08:25,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 113 transitions. [2025-02-06 13:08:25,949 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5885416666666666 [2025-02-06 13:08:25,949 INFO L175 Difference]: Start difference. First operand has 67 places, 60 transitions, 222 flow. Second operand 3 states and 113 transitions. [2025-02-06 13:08:25,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 84 transitions, 451 flow [2025-02-06 13:08:25,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 84 transitions, 436 flow, removed 6 selfloop flow, removed 1 redundant places. [2025-02-06 13:08:25,954 INFO L231 Difference]: Finished difference. Result has 69 places, 61 transitions, 230 flow [2025-02-06 13:08:25,954 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=230, PETRI_PLACES=69, PETRI_TRANSITIONS=61} [2025-02-06 13:08:25,955 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 3 predicate places. [2025-02-06 13:08:25,955 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 61 transitions, 230 flow [2025-02-06 13:08:25,955 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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) [2025-02-06 13:08:25,955 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:08:25,955 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:08:25,955 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2025-02-06 13:08:25,955 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-02-06 13:08:25,955 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:08:25,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1116394045, now seen corresponding path program 1 times [2025-02-06 13:08:25,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:08:25,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780804872] [2025-02-06 13:08:25,956 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:08:25,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:08:25,965 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-02-06 13:08:25,986 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-02-06 13:08:25,986 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:25,987 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:26,243 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:08:26,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:08:26,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780804872] [2025-02-06 13:08:26,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780804872] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:08:26,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:08:26,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-06 13:08:26,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129261050] [2025-02-06 13:08:26,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:08:26,244 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 13:08:26,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:08:26,244 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 13:08:26,244 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2025-02-06 13:08:26,248 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 64 [2025-02-06 13:08:26,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 61 transitions, 230 flow. Second operand has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 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) [2025-02-06 13:08:26,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:08:26,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 64 [2025-02-06 13:08:26,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:08:27,303 INFO L124 PetriNetUnfolderBase]: 14723/21473 cut-off events. [2025-02-06 13:08:27,303 INFO L125 PetriNetUnfolderBase]: For 10143/10143 co-relation queries the response was YES. [2025-02-06 13:08:27,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50340 conditions, 21473 events. 14723/21473 cut-off events. For 10143/10143 co-relation queries the response was YES. Maximal size of possible extension queue 765. Compared 136759 event pairs, 1023 based on Foata normal form. 540/20795 useless extension candidates. Maximal degree in co-relation 39085. Up to 8994 conditions per place. [2025-02-06 13:08:27,389 INFO L140 encePairwiseOnDemand]: 56/64 looper letters, 140 selfloop transitions, 17 changer transitions 3/168 dead transitions. [2025-02-06 13:08:27,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 168 transitions, 859 flow [2025-02-06 13:08:27,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-06 13:08:27,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-06 13:08:27,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 277 transitions. [2025-02-06 13:08:27,391 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.541015625 [2025-02-06 13:08:27,391 INFO L175 Difference]: Start difference. First operand has 69 places, 61 transitions, 230 flow. Second operand 8 states and 277 transitions. [2025-02-06 13:08:27,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 168 transitions, 859 flow [2025-02-06 13:08:27,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 168 transitions, 846 flow, removed 3 selfloop flow, removed 1 redundant places. [2025-02-06 13:08:27,401 INFO L231 Difference]: Finished difference. Result has 81 places, 76 transitions, 363 flow [2025-02-06 13:08:27,401 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=363, PETRI_PLACES=81, PETRI_TRANSITIONS=76} [2025-02-06 13:08:27,401 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 15 predicate places. [2025-02-06 13:08:27,401 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 76 transitions, 363 flow [2025-02-06 13:08:27,402 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 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) [2025-02-06 13:08:27,402 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:08:27,402 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:08:27,402 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2025-02-06 13:08:27,402 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-02-06 13:08:27,402 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:08:27,402 INFO L85 PathProgramCache]: Analyzing trace with hash -596923829, now seen corresponding path program 2 times [2025-02-06 13:08:27,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:08:27,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533276541] [2025-02-06 13:08:27,403 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:08:27,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:08:27,409 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 37 statements into 2 equivalence classes. [2025-02-06 13:08:27,420 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 37 of 37 statements. [2025-02-06 13:08:27,420 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:08:27,420 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:27,743 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:08:27,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:08:27,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533276541] [2025-02-06 13:08:27,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533276541] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:08:27,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:08:27,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-02-06 13:08:27,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603859783] [2025-02-06 13:08:27,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:08:27,743 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-02-06 13:08:27,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:08:27,744 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-02-06 13:08:27,744 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2025-02-06 13:08:27,756 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 64 [2025-02-06 13:08:27,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 76 transitions, 363 flow. Second operand has 9 states, 9 states have (on average 19.444444444444443) internal successors, (175), 9 states have internal predecessors, (175), 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) [2025-02-06 13:08:27,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:08:27,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 64 [2025-02-06 13:08:27,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:08:30,897 INFO L124 PetriNetUnfolderBase]: 38558/54336 cut-off events. [2025-02-06 13:08:30,898 INFO L125 PetriNetUnfolderBase]: For 53190/53194 co-relation queries the response was YES. [2025-02-06 13:08:31,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149072 conditions, 54336 events. 38558/54336 cut-off events. For 53190/53194 co-relation queries the response was YES. Maximal size of possible extension queue 1749. Compared 362074 event pairs, 4003 based on Foata normal form. 0/51121 useless extension candidates. Maximal degree in co-relation 119874. Up to 14278 conditions per place. [2025-02-06 13:08:31,548 INFO L140 encePairwiseOnDemand]: 52/64 looper letters, 251 selfloop transitions, 71 changer transitions 0/330 dead transitions. [2025-02-06 13:08:31,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 330 transitions, 2104 flow [2025-02-06 13:08:31,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-02-06 13:08:31,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-02-06 13:08:31,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 488 transitions. [2025-02-06 13:08:31,553 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5083333333333333 [2025-02-06 13:08:31,553 INFO L175 Difference]: Start difference. First operand has 81 places, 76 transitions, 363 flow. Second operand 15 states and 488 transitions. [2025-02-06 13:08:31,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 330 transitions, 2104 flow [2025-02-06 13:08:32,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 330 transitions, 2075 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 13:08:32,204 INFO L231 Difference]: Finished difference. Result has 106 places, 140 transitions, 1131 flow [2025-02-06 13:08:32,205 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1131, PETRI_PLACES=106, PETRI_TRANSITIONS=140} [2025-02-06 13:08:32,205 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 40 predicate places. [2025-02-06 13:08:32,206 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 140 transitions, 1131 flow [2025-02-06 13:08:32,206 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 19.444444444444443) internal successors, (175), 9 states have internal predecessors, (175), 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) [2025-02-06 13:08:32,206 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:08:32,206 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:08:32,206 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2025-02-06 13:08:32,206 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-02-06 13:08:32,207 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:08:32,207 INFO L85 PathProgramCache]: Analyzing trace with hash -2097134643, now seen corresponding path program 3 times [2025-02-06 13:08:32,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:08:32,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644004126] [2025-02-06 13:08:32,207 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 13:08:32,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:08:32,217 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 37 statements into 3 equivalence classes. [2025-02-06 13:08:32,235 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 36 of 37 statements. [2025-02-06 13:08:32,237 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 13:08:32,237 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:32,463 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:08:32,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:08:32,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644004126] [2025-02-06 13:08:32,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644004126] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:08:32,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:08:32,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-06 13:08:32,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805571081] [2025-02-06 13:08:32,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:08:32,464 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 13:08:32,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:08:32,465 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 13:08:32,465 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-02-06 13:08:32,475 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 64 [2025-02-06 13:08:32,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 140 transitions, 1131 flow. Second operand has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 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) [2025-02-06 13:08:32,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:08:32,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 64 [2025-02-06 13:08:32,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:08:38,059 INFO L124 PetriNetUnfolderBase]: 40754/60856 cut-off events. [2025-02-06 13:08:38,060 INFO L125 PetriNetUnfolderBase]: For 192974/193061 co-relation queries the response was YES. [2025-02-06 13:08:38,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 232357 conditions, 60856 events. 40754/60856 cut-off events. For 192974/193061 co-relation queries the response was YES. Maximal size of possible extension queue 2194. Compared 452149 event pairs, 6761 based on Foata normal form. 1528/62204 useless extension candidates. Maximal degree in co-relation 219127. Up to 31429 conditions per place. [2025-02-06 13:08:38,841 INFO L140 encePairwiseOnDemand]: 52/64 looper letters, 278 selfloop transitions, 140 changer transitions 13/441 dead transitions. [2025-02-06 13:08:38,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 441 transitions, 4348 flow [2025-02-06 13:08:38,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-06 13:08:38,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-02-06 13:08:38,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 376 transitions. [2025-02-06 13:08:38,843 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5340909090909091 [2025-02-06 13:08:38,846 INFO L175 Difference]: Start difference. First operand has 106 places, 140 transitions, 1131 flow. Second operand 11 states and 376 transitions. [2025-02-06 13:08:38,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 441 transitions, 4348 flow [2025-02-06 13:08:41,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 441 transitions, 4348 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-02-06 13:08:41,012 INFO L231 Difference]: Finished difference. Result has 125 places, 268 transitions, 3105 flow [2025-02-06 13:08:41,013 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=1131, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3105, PETRI_PLACES=125, PETRI_TRANSITIONS=268} [2025-02-06 13:08:41,013 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 59 predicate places. [2025-02-06 13:08:41,013 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 268 transitions, 3105 flow [2025-02-06 13:08:41,013 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 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) [2025-02-06 13:08:41,013 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:08:41,013 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:08:41,013 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2025-02-06 13:08:41,014 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-02-06 13:08:41,014 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:08:41,014 INFO L85 PathProgramCache]: Analyzing trace with hash 2011086709, now seen corresponding path program 4 times [2025-02-06 13:08:41,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:08:41,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714550325] [2025-02-06 13:08:41,014 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 13:08:41,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:08:41,021 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 37 statements into 2 equivalence classes. [2025-02-06 13:08:41,028 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 37 of 37 statements. [2025-02-06 13:08:41,028 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 13:08:41,028 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:41,188 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-06 13:08:41,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:08:41,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714550325] [2025-02-06 13:08:41,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714550325] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:08:41,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:08:41,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-06 13:08:41,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502191597] [2025-02-06 13:08:41,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:08:41,189 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 13:08:41,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:08:41,189 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 13:08:41,189 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-02-06 13:08:41,192 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 64 [2025-02-06 13:08:41,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 268 transitions, 3105 flow. Second operand has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 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) [2025-02-06 13:08:41,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:08:41,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 64 [2025-02-06 13:08:41,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:08:48,516 INFO L124 PetriNetUnfolderBase]: 44367/66576 cut-off events. [2025-02-06 13:08:48,517 INFO L125 PetriNetUnfolderBase]: For 399858/399908 co-relation queries the response was YES. [2025-02-06 13:08:48,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 317621 conditions, 66576 events. 44367/66576 cut-off events. For 399858/399908 co-relation queries the response was YES. Maximal size of possible extension queue 2591. Compared 506932 event pairs, 9545 based on Foata normal form. 288/66580 useless extension candidates. Maximal degree in co-relation 294936. Up to 41571 conditions per place. [2025-02-06 13:08:49,084 INFO L140 encePairwiseOnDemand]: 56/64 looper letters, 261 selfloop transitions, 218 changer transitions 55/544 dead transitions. [2025-02-06 13:08:49,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 544 transitions, 7281 flow [2025-02-06 13:08:49,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-06 13:08:49,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-06 13:08:49,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 294 transitions. [2025-02-06 13:08:49,085 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5104166666666666 [2025-02-06 13:08:49,085 INFO L175 Difference]: Start difference. First operand has 125 places, 268 transitions, 3105 flow. Second operand 9 states and 294 transitions. [2025-02-06 13:08:49,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 544 transitions, 7281 flow [2025-02-06 13:08:54,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 544 transitions, 7227 flow, removed 27 selfloop flow, removed 0 redundant places. [2025-02-06 13:08:54,314 INFO L231 Difference]: Finished difference. Result has 139 places, 402 transitions, 5727 flow [2025-02-06 13:08:54,315 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=3065, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5727, PETRI_PLACES=139, PETRI_TRANSITIONS=402} [2025-02-06 13:08:54,315 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 73 predicate places. [2025-02-06 13:08:54,315 INFO L471 AbstractCegarLoop]: Abstraction has has 139 places, 402 transitions, 5727 flow [2025-02-06 13:08:54,316 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 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) [2025-02-06 13:08:54,316 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:08:54,316 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:08:54,316 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2025-02-06 13:08:54,316 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-02-06 13:08:54,316 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:08:54,316 INFO L85 PathProgramCache]: Analyzing trace with hash -2058253197, now seen corresponding path program 5 times [2025-02-06 13:08:54,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:08:54,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172316185] [2025-02-06 13:08:54,317 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 13:08:54,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:08:54,325 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 37 statements into 3 equivalence classes. [2025-02-06 13:08:54,333 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 37 of 37 statements. [2025-02-06 13:08:54,333 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-02-06 13:08:54,333 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:54,574 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:08:54,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:08:54,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172316185] [2025-02-06 13:08:54,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172316185] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:08:54,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:08:54,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-06 13:08:54,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133089895] [2025-02-06 13:08:54,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:08:54,576 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 13:08:54,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:08:54,576 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 13:08:54,576 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-02-06 13:08:54,588 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 64 [2025-02-06 13:08:54,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 402 transitions, 5727 flow. Second operand has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 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) [2025-02-06 13:08:54,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:08:54,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 64 [2025-02-06 13:08:54,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand