./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/chl-node-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8fc3dc66 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/chl-node-symm.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9db11e263e78e3a6bd75c2a0c3dda64920ec857df2fbb1d0b7b1072a48f36a31 --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-17 14:23:34,899 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-17 14:23:34,944 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-03-17 14:23:34,949 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-17 14:23:34,951 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-17 14:23:34,980 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-17 14:23:34,981 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-17 14:23:34,981 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-17 14:23:34,982 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-17 14:23:34,982 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-17 14:23:34,982 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-17 14:23:34,982 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-17 14:23:34,983 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-17 14:23:34,983 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-17 14:23:34,984 INFO L153 SettingsManager]: * Use SBE=true [2025-03-17 14:23:34,984 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-17 14:23:34,984 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-17 14:23:34,984 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-17 14:23:34,984 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-17 14:23:34,984 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-17 14:23:34,984 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-17 14:23:34,984 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-17 14:23:34,984 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-17 14:23:34,984 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-17 14:23:34,984 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-17 14:23:34,985 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-17 14:23:34,985 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-17 14:23:34,985 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-17 14:23:34,985 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-17 14:23:34,985 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-17 14:23:34,985 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-17 14:23:34,985 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-17 14:23:34,985 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-17 14:23:34,986 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 14:23:34,986 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-17 14:23:34,986 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-17 14:23:34,986 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-17 14:23:34,987 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-17 14:23:34,987 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-17 14:23:34,987 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-17 14:23:34,987 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-17 14:23:34,987 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-17 14:23:34,987 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9db11e263e78e3a6bd75c2a0c3dda64920ec857df2fbb1d0b7b1072a48f36a31 [2025-03-17 14:23:35,378 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-17 14:23:35,387 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-17 14:23:35,389 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-17 14:23:35,391 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-17 14:23:35,391 INFO L274 PluginConnector]: CDTParser initialized [2025-03-17 14:23:35,392 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-node-symm.wvr.c [2025-03-17 14:23:36,526 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed15c0c89/7f3dc8f3660c434884f0990a223161fd/FLAGa3414e070 [2025-03-17 14:23:36,748 INFO L384 CDTParser]: Found 1 translation units. [2025-03-17 14:23:36,748 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-node-symm.wvr.c [2025-03-17 14:23:36,756 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed15c0c89/7f3dc8f3660c434884f0990a223161fd/FLAGa3414e070 [2025-03-17 14:23:37,099 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed15c0c89/7f3dc8f3660c434884f0990a223161fd [2025-03-17 14:23:37,100 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-17 14:23:37,101 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-17 14:23:37,102 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-17 14:23:37,102 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-17 14:23:37,105 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-17 14:23:37,106 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 02:23:37" (1/1) ... [2025-03-17 14:23:37,106 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@312fc221 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:23:37, skipping insertion in model container [2025-03-17 14:23:37,106 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 02:23:37" (1/1) ... [2025-03-17 14:23:37,120 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-17 14:23:37,240 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-17 14:23:37,243 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-17 14:23:37,245 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 14:23:37,255 INFO L200 MainTranslator]: Completed pre-run [2025-03-17 14:23:37,284 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 14:23:37,299 INFO L204 MainTranslator]: Completed translation [2025-03-17 14:23:37,300 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:23:37 WrapperNode [2025-03-17 14:23:37,300 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-17 14:23:37,301 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-17 14:23:37,301 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-17 14:23:37,301 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-17 14:23:37,306 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:23:37" (1/1) ... [2025-03-17 14:23:37,316 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:23:37" (1/1) ... [2025-03-17 14:23:37,335 INFO L138 Inliner]: procedures = 25, calls = 41, calls flagged for inlining = 19, calls inlined = 25, statements flattened = 279 [2025-03-17 14:23:37,336 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-17 14:23:37,336 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-17 14:23:37,336 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-17 14:23:37,336 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-17 14:23:37,342 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:23:37" (1/1) ... [2025-03-17 14:23:37,342 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:23:37" (1/1) ... [2025-03-17 14:23:37,345 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:23:37" (1/1) ... [2025-03-17 14:23:37,363 INFO L175 MemorySlicer]: Split 18 memory accesses to 3 slices as follows [10, 2, 6]. 56 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [0, 2, 0]. The 4 writes are split as follows [2, 0, 2]. [2025-03-17 14:23:37,363 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:23:37" (1/1) ... [2025-03-17 14:23:37,363 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:23:37" (1/1) ... [2025-03-17 14:23:37,371 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:23:37" (1/1) ... [2025-03-17 14:23:37,372 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:23:37" (1/1) ... [2025-03-17 14:23:37,377 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:23:37" (1/1) ... [2025-03-17 14:23:37,378 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:23:37" (1/1) ... [2025-03-17 14:23:37,379 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-17 14:23:37,380 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-17 14:23:37,380 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-17 14:23:37,380 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-17 14:23:37,385 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:23:37" (1/1) ... [2025-03-17 14:23:37,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 14:23:37,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:23:37,411 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-17 14:23:37,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-17 14:23:37,433 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-17 14:23:37,433 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-17 14:23:37,433 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-17 14:23:37,433 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-17 14:23:37,433 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-17 14:23:37,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-17 14:23:37,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-17 14:23:37,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-03-17 14:23:37,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-17 14:23:37,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-17 14:23:37,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-03-17 14:23:37,434 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-17 14:23:37,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-17 14:23:37,434 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-17 14:23:37,434 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-17 14:23:37,434 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-17 14:23:37,434 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-03-17 14:23:37,435 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-17 14:23:37,526 INFO L256 CfgBuilder]: Building ICFG [2025-03-17 14:23:37,529 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-17 14:23:38,012 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-17 14:23:38,012 INFO L307 CfgBuilder]: Performing block encoding [2025-03-17 14:23:38,261 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-17 14:23:38,262 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-17 14:23:38,263 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 02:23:38 BoogieIcfgContainer [2025-03-17 14:23:38,263 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-17 14:23:38,265 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-17 14:23:38,265 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-17 14:23:38,268 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-17 14:23:38,268 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 02:23:37" (1/3) ... [2025-03-17 14:23:38,268 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@138ad3b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 02:23:38, skipping insertion in model container [2025-03-17 14:23:38,269 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:23:37" (2/3) ... [2025-03-17 14:23:38,269 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@138ad3b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 02:23:38, skipping insertion in model container [2025-03-17 14:23:38,269 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 02:23:38" (3/3) ... [2025-03-17 14:23:38,270 INFO L128 eAbstractionObserver]: Analyzing ICFG chl-node-symm.wvr.c [2025-03-17 14:23:38,282 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-17 14:23:38,283 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG chl-node-symm.wvr.c that has 3 procedures, 75 locations, 1 initial locations, 4 loop locations, and 34 error locations. [2025-03-17 14:23:38,283 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-17 14:23:38,335 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-03-17 14:23:38,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 82 transitions, 178 flow [2025-03-17 14:23:38,393 INFO L124 PetriNetUnfolderBase]: 8/80 cut-off events. [2025-03-17 14:23:38,396 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-17 14:23:38,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 80 events. 8/80 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 229 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 53. Up to 2 conditions per place. [2025-03-17 14:23:38,401 INFO L82 GeneralOperation]: Start removeDead. Operand has 81 places, 82 transitions, 178 flow [2025-03-17 14:23:38,403 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 78 places, 79 transitions, 170 flow [2025-03-17 14:23:38,413 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-17 14:23:38,423 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;@7ab08974, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-17 14:23:38,423 INFO L334 AbstractCegarLoop]: Starting to check reachability of 60 error locations. [2025-03-17 14:23:38,425 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-17 14:23:38,426 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-03-17 14:23:38,426 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-17 14:23:38,426 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:38,426 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-17 14:23:38,426 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-17 14:23:38,431 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:38,431 INFO L85 PathProgramCache]: Analyzing trace with hash 833932, now seen corresponding path program 1 times [2025-03-17 14:23:38,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:38,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173754958] [2025-03-17 14:23:38,438 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:38,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:38,489 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-17 14:23:38,511 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-17 14:23:38,512 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:38,512 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:38,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:23:38,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:38,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173754958] [2025-03-17 14:23:38,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173754958] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:23:38,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:23:38,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-03-17 14:23:38,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808850975] [2025-03-17 14:23:38,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:23:38,661 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 14:23:38,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:38,676 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 14:23:38,677 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 14:23:38,712 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 82 [2025-03-17 14:23:38,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 79 transitions, 170 flow. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:38,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:38,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 82 [2025-03-17 14:23:38,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:23:38,861 INFO L124 PetriNetUnfolderBase]: 185/551 cut-off events. [2025-03-17 14:23:38,862 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2025-03-17 14:23:38,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 874 conditions, 551 events. 185/551 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3255 event pairs, 112 based on Foata normal form. 1/409 useless extension candidates. Maximal degree in co-relation 789. Up to 292 conditions per place. [2025-03-17 14:23:38,867 INFO L140 encePairwiseOnDemand]: 77/82 looper letters, 32 selfloop transitions, 2 changer transitions 0/75 dead transitions. [2025-03-17 14:23:38,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 75 transitions, 230 flow [2025-03-17 14:23:38,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 14:23:38,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 14:23:38,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 169 transitions. [2025-03-17 14:23:38,875 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6869918699186992 [2025-03-17 14:23:38,876 INFO L175 Difference]: Start difference. First operand has 78 places, 79 transitions, 170 flow. Second operand 3 states and 169 transitions. [2025-03-17 14:23:38,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 75 transitions, 230 flow [2025-03-17 14:23:38,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 75 transitions, 222 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-17 14:23:38,885 INFO L231 Difference]: Finished difference. Result has 72 places, 75 transitions, 158 flow [2025-03-17 14:23:38,887 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=158, PETRI_PLACES=72, PETRI_TRANSITIONS=75} [2025-03-17 14:23:38,889 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, -6 predicate places. [2025-03-17 14:23:38,891 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 75 transitions, 158 flow [2025-03-17 14:23:38,891 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:38,891 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:38,891 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-17 14:23:38,892 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-17 14:23:38,892 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-17 14:23:38,893 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:38,893 INFO L85 PathProgramCache]: Analyzing trace with hash 833933, now seen corresponding path program 1 times [2025-03-17 14:23:38,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:38,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863707310] [2025-03-17 14:23:38,893 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:38,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:38,902 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-17 14:23:38,919 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-17 14:23:38,919 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:38,919 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:39,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:23:39,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:39,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863707310] [2025-03-17 14:23:39,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863707310] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:23:39,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:23:39,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 14:23:39,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93922937] [2025-03-17 14:23:39,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:23:39,169 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:23:39,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:39,169 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:23:39,170 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:23:39,226 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 82 [2025-03-17 14:23:39,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 75 transitions, 158 flow. Second operand has 4 states, 4 states have (on average 44.75) internal successors, (179), 4 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:39,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:39,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 82 [2025-03-17 14:23:39,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:23:39,327 INFO L124 PetriNetUnfolderBase]: 186/554 cut-off events. [2025-03-17 14:23:39,328 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-17 14:23:39,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 868 conditions, 554 events. 186/554 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3273 event pairs, 112 based on Foata normal form. 0/409 useless extension candidates. Maximal degree in co-relation 839. Up to 301 conditions per place. [2025-03-17 14:23:39,332 INFO L140 encePairwiseOnDemand]: 78/82 looper letters, 36 selfloop transitions, 3 changer transitions 0/78 dead transitions. [2025-03-17 14:23:39,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 78 transitions, 242 flow [2025-03-17 14:23:39,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 14:23:39,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 14:23:39,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 172 transitions. [2025-03-17 14:23:39,334 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6991869918699187 [2025-03-17 14:23:39,335 INFO L175 Difference]: Start difference. First operand has 72 places, 75 transitions, 158 flow. Second operand 3 states and 172 transitions. [2025-03-17 14:23:39,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 78 transitions, 242 flow [2025-03-17 14:23:39,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 78 transitions, 238 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:23:39,337 INFO L231 Difference]: Finished difference. Result has 73 places, 77 transitions, 173 flow [2025-03-17 14:23:39,337 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=173, PETRI_PLACES=73, PETRI_TRANSITIONS=77} [2025-03-17 14:23:39,338 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, -5 predicate places. [2025-03-17 14:23:39,338 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 77 transitions, 173 flow [2025-03-17 14:23:39,338 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.75) internal successors, (179), 4 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:39,338 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:39,339 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2025-03-17 14:23:39,339 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-17 14:23:39,340 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-17 14:23:39,340 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:39,340 INFO L85 PathProgramCache]: Analyzing trace with hash 25854701, now seen corresponding path program 1 times [2025-03-17 14:23:39,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:39,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519124458] [2025-03-17 14:23:39,340 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:39,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:39,348 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-03-17 14:23:39,354 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-03-17 14:23:39,356 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:39,357 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:39,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:23:39,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:39,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519124458] [2025-03-17 14:23:39,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519124458] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:23:39,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:23:39,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 14:23:39,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827334673] [2025-03-17 14:23:39,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:23:39,405 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 14:23:39,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:39,406 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 14:23:39,406 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 14:23:39,411 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 82 [2025-03-17 14:23:39,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 77 transitions, 173 flow. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:39,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:39,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 82 [2025-03-17 14:23:39,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:23:39,514 INFO L124 PetriNetUnfolderBase]: 185/553 cut-off events. [2025-03-17 14:23:39,514 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-17 14:23:39,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 869 conditions, 553 events. 185/553 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3260 event pairs, 112 based on Foata normal form. 1/412 useless extension candidates. Maximal degree in co-relation 856. Up to 298 conditions per place. [2025-03-17 14:23:39,517 INFO L140 encePairwiseOnDemand]: 79/82 looper letters, 34 selfloop transitions, 2 changer transitions 0/77 dead transitions. [2025-03-17 14:23:39,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 77 transitions, 242 flow [2025-03-17 14:23:39,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 14:23:39,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 14:23:39,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 175 transitions. [2025-03-17 14:23:39,518 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7113821138211383 [2025-03-17 14:23:39,518 INFO L175 Difference]: Start difference. First operand has 73 places, 77 transitions, 173 flow. Second operand 3 states and 175 transitions. [2025-03-17 14:23:39,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 77 transitions, 242 flow [2025-03-17 14:23:39,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 77 transitions, 240 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 14:23:39,520 INFO L231 Difference]: Finished difference. Result has 74 places, 76 transitions, 170 flow [2025-03-17 14:23:39,520 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=170, PETRI_PLACES=74, PETRI_TRANSITIONS=76} [2025-03-17 14:23:39,520 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, -4 predicate places. [2025-03-17 14:23:39,520 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 76 transitions, 170 flow [2025-03-17 14:23:39,520 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:39,521 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:39,521 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2025-03-17 14:23:39,521 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-17 14:23:39,521 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-17 14:23:39,521 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:39,521 INFO L85 PathProgramCache]: Analyzing trace with hash 801435345, now seen corresponding path program 1 times [2025-03-17 14:23:39,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:39,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657719912] [2025-03-17 14:23:39,522 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:39,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:39,529 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-03-17 14:23:39,542 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-03-17 14:23:39,542 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:39,542 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:39,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:23:39,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:39,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657719912] [2025-03-17 14:23:39,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657719912] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:23:39,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379522593] [2025-03-17 14:23:39,778 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:39,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:23:39,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:23:39,781 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:23:39,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-17 14:23:39,827 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-03-17 14:23:39,840 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-03-17 14:23:39,840 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:39,840 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:39,842 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-17 14:23:39,845 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:23:39,888 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2025-03-17 14:23:40,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:23:40,081 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:23:40,168 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:23:40,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379522593] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:23:40,169 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:23:40,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2025-03-17 14:23:40,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577120525] [2025-03-17 14:23:40,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:23:40,169 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-17 14:23:40,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:40,170 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-17 14:23:40,170 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2025-03-17 14:23:40,502 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 82 [2025-03-17 14:23:40,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 76 transitions, 170 flow. Second operand has 11 states, 11 states have (on average 45.36363636363637) internal successors, (499), 11 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:40,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:40,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 82 [2025-03-17 14:23:40,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:23:40,847 INFO L124 PetriNetUnfolderBase]: 186/555 cut-off events. [2025-03-17 14:23:40,847 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-03-17 14:23:40,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 877 conditions, 555 events. 186/555 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3270 event pairs, 112 based on Foata normal form. 0/412 useless extension candidates. Maximal degree in co-relation 863. Up to 297 conditions per place. [2025-03-17 14:23:40,851 INFO L140 encePairwiseOnDemand]: 77/82 looper letters, 32 selfloop transitions, 8 changer transitions 0/79 dead transitions. [2025-03-17 14:23:40,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 79 transitions, 258 flow [2025-03-17 14:23:40,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-17 14:23:40,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-17 14:23:40,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 350 transitions. [2025-03-17 14:23:40,853 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2025-03-17 14:23:40,853 INFO L175 Difference]: Start difference. First operand has 74 places, 76 transitions, 170 flow. Second operand 7 states and 350 transitions. [2025-03-17 14:23:40,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 79 transitions, 258 flow [2025-03-17 14:23:40,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 79 transitions, 254 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:23:40,855 INFO L231 Difference]: Finished difference. Result has 77 places, 79 transitions, 192 flow [2025-03-17 14:23:40,855 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=192, PETRI_PLACES=77, PETRI_TRANSITIONS=79} [2025-03-17 14:23:40,855 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, -1 predicate places. [2025-03-17 14:23:40,855 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 79 transitions, 192 flow [2025-03-17 14:23:40,857 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 45.36363636363637) internal successors, (499), 11 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:40,857 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:40,857 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-03-17 14:23:40,863 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-17 14:23:41,062 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:23:41,063 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-17 14:23:41,063 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:41,063 INFO L85 PathProgramCache]: Analyzing trace with hash -925305303, now seen corresponding path program 1 times [2025-03-17 14:23:41,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:41,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753315168] [2025-03-17 14:23:41,063 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:41,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:41,070 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-17 14:23:41,084 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-17 14:23:41,084 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:41,085 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:41,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:23:41,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:41,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753315168] [2025-03-17 14:23:41,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753315168] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:23:41,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:23:41,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 14:23:41,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705469597] [2025-03-17 14:23:41,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:23:41,240 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:23:41,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:41,240 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:23:41,241 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-17 14:23:41,330 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 82 [2025-03-17 14:23:41,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 79 transitions, 192 flow. Second operand has 5 states, 5 states have (on average 45.2) internal successors, (226), 5 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:41,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:41,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 82 [2025-03-17 14:23:41,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:23:41,493 INFO L124 PetriNetUnfolderBase]: 187/558 cut-off events. [2025-03-17 14:23:41,494 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-17 14:23:41,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 890 conditions, 558 events. 187/558 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3292 event pairs, 112 based on Foata normal form. 0/414 useless extension candidates. Maximal degree in co-relation 853. Up to 301 conditions per place. [2025-03-17 14:23:41,497 INFO L140 encePairwiseOnDemand]: 76/82 looper letters, 37 selfloop transitions, 6 changer transitions 0/82 dead transitions. [2025-03-17 14:23:41,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 82 transitions, 284 flow [2025-03-17 14:23:41,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:23:41,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:23:41,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 217 transitions. [2025-03-17 14:23:41,498 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6615853658536586 [2025-03-17 14:23:41,498 INFO L175 Difference]: Start difference. First operand has 77 places, 79 transitions, 192 flow. Second operand 4 states and 217 transitions. [2025-03-17 14:23:41,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 82 transitions, 284 flow [2025-03-17 14:23:41,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 82 transitions, 269 flow, removed 4 selfloop flow, removed 3 redundant places. [2025-03-17 14:23:41,501 INFO L231 Difference]: Finished difference. Result has 78 places, 81 transitions, 205 flow [2025-03-17 14:23:41,501 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=205, PETRI_PLACES=78, PETRI_TRANSITIONS=81} [2025-03-17 14:23:41,502 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 0 predicate places. [2025-03-17 14:23:41,502 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 81 transitions, 205 flow [2025-03-17 14:23:41,502 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 45.2) internal successors, (226), 5 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:41,503 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:41,503 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:23:41,504 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-17 14:23:41,504 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-17 14:23:41,504 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:41,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1380306158, now seen corresponding path program 1 times [2025-03-17 14:23:41,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:41,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969618982] [2025-03-17 14:23:41,504 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:41,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:41,510 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-17 14:23:41,517 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-17 14:23:41,517 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:41,517 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:41,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:23:41,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:41,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969618982] [2025-03-17 14:23:41,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969618982] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:23:41,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:23:41,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 14:23:41,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549901198] [2025-03-17 14:23:41,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:23:41,562 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:23:41,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:41,562 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:23:41,562 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:23:41,576 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 82 [2025-03-17 14:23:41,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 81 transitions, 205 flow. Second operand has 4 states, 4 states have (on average 47.5) internal successors, (190), 4 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:41,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:41,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 82 [2025-03-17 14:23:41,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:23:41,664 INFO L124 PetriNetUnfolderBase]: 186/557 cut-off events. [2025-03-17 14:23:41,664 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-03-17 14:23:41,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 889 conditions, 557 events. 186/557 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3267 event pairs, 112 based on Foata normal form. 1/417 useless extension candidates. Maximal degree in co-relation 849. Up to 299 conditions per place. [2025-03-17 14:23:41,667 INFO L140 encePairwiseOnDemand]: 77/82 looper letters, 36 selfloop transitions, 5 changer transitions 0/81 dead transitions. [2025-03-17 14:23:41,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 81 transitions, 284 flow [2025-03-17 14:23:41,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:23:41,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:23:41,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 223 transitions. [2025-03-17 14:23:41,668 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6798780487804879 [2025-03-17 14:23:41,668 INFO L175 Difference]: Start difference. First operand has 78 places, 81 transitions, 205 flow. Second operand 4 states and 223 transitions. [2025-03-17 14:23:41,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 81 transitions, 284 flow [2025-03-17 14:23:41,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 81 transitions, 279 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:23:41,670 INFO L231 Difference]: Finished difference. Result has 79 places, 80 transitions, 205 flow [2025-03-17 14:23:41,670 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=205, PETRI_PLACES=79, PETRI_TRANSITIONS=80} [2025-03-17 14:23:41,671 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 1 predicate places. [2025-03-17 14:23:41,672 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 80 transitions, 205 flow [2025-03-17 14:23:41,672 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.5) internal successors, (190), 4 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:41,672 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:41,672 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2025-03-17 14:23:41,672 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-03-17 14:23:41,672 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-17 14:23:41,673 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:41,673 INFO L85 PathProgramCache]: Analyzing trace with hash -160139046, now seen corresponding path program 1 times [2025-03-17 14:23:41,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:41,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408484343] [2025-03-17 14:23:41,673 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:41,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:41,679 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-17 14:23:41,692 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-17 14:23:41,693 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:41,693 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:41,887 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:23:41,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:41,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408484343] [2025-03-17 14:23:41,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408484343] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:23:41,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113723252] [2025-03-17 14:23:41,888 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:41,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:23:41,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:23:41,890 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:23:41,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-17 14:23:41,931 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-17 14:23:41,956 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-17 14:23:41,956 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:41,956 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:41,957 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-17 14:23:41,958 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:23:41,984 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2025-03-17 14:23:42,104 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:23:42,104 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:23:42,238 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:23:42,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113723252] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:23:42,238 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:23:42,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2025-03-17 14:23:42,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674041774] [2025-03-17 14:23:42,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:23:42,239 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-17 14:23:42,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:42,239 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-17 14:23:42,240 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2025-03-17 14:23:42,726 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 82 [2025-03-17 14:23:42,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 80 transitions, 205 flow. Second operand has 13 states, 13 states have (on average 45.61538461538461) internal successors, (593), 13 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:42,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:42,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 82 [2025-03-17 14:23:42,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:23:43,038 INFO L124 PetriNetUnfolderBase]: 187/559 cut-off events. [2025-03-17 14:23:43,040 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2025-03-17 14:23:43,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 898 conditions, 559 events. 187/559 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3273 event pairs, 112 based on Foata normal form. 0/418 useless extension candidates. Maximal degree in co-relation 855. Up to 292 conditions per place. [2025-03-17 14:23:43,045 INFO L140 encePairwiseOnDemand]: 74/82 looper letters, 28 selfloop transitions, 16 changer transitions 0/83 dead transitions. [2025-03-17 14:23:43,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 83 transitions, 301 flow [2025-03-17 14:23:43,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 14:23:43,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 14:23:43,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 442 transitions. [2025-03-17 14:23:43,048 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5989159891598916 [2025-03-17 14:23:43,048 INFO L175 Difference]: Start difference. First operand has 79 places, 80 transitions, 205 flow. Second operand 9 states and 442 transitions. [2025-03-17 14:23:43,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 83 transitions, 301 flow [2025-03-17 14:23:43,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 83 transitions, 291 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-17 14:23:43,052 INFO L231 Difference]: Finished difference. Result has 83 places, 83 transitions, 235 flow [2025-03-17 14:23:43,052 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=235, PETRI_PLACES=83, PETRI_TRANSITIONS=83} [2025-03-17 14:23:43,053 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 5 predicate places. [2025-03-17 14:23:43,053 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 83 transitions, 235 flow [2025-03-17 14:23:43,053 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 45.61538461538461) internal successors, (593), 13 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:43,053 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:43,053 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:23:43,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-17 14:23:43,253 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2025-03-17 14:23:43,254 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-17 14:23:43,255 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:43,255 INFO L85 PathProgramCache]: Analyzing trace with hash -669343652, now seen corresponding path program 1 times [2025-03-17 14:23:43,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:43,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882756605] [2025-03-17 14:23:43,255 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:43,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:43,266 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-17 14:23:43,272 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-17 14:23:43,272 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:43,272 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:43,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:23:43,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:43,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882756605] [2025-03-17 14:23:43,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882756605] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:23:43,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:23:43,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 14:23:43,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187853569] [2025-03-17 14:23:43,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:23:43,297 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 14:23:43,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:43,297 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 14:23:43,298 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 14:23:43,320 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 82 [2025-03-17 14:23:43,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 83 transitions, 235 flow. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:43,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:43,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 82 [2025-03-17 14:23:43,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:23:43,391 INFO L124 PetriNetUnfolderBase]: 187/557 cut-off events. [2025-03-17 14:23:43,391 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-03-17 14:23:43,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 907 conditions, 557 events. 187/557 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3266 event pairs, 112 based on Foata normal form. 0/418 useless extension candidates. Maximal degree in co-relation 837. Up to 301 conditions per place. [2025-03-17 14:23:43,393 INFO L140 encePairwiseOnDemand]: 78/82 looper letters, 41 selfloop transitions, 3 changer transitions 0/81 dead transitions. [2025-03-17 14:23:43,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 81 transitions, 319 flow [2025-03-17 14:23:43,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 14:23:43,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 14:23:43,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 168 transitions. [2025-03-17 14:23:43,395 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6829268292682927 [2025-03-17 14:23:43,395 INFO L175 Difference]: Start difference. First operand has 83 places, 83 transitions, 235 flow. Second operand 3 states and 168 transitions. [2025-03-17 14:23:43,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 81 transitions, 319 flow [2025-03-17 14:23:43,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 81 transitions, 300 flow, removed 4 selfloop flow, removed 3 redundant places. [2025-03-17 14:23:43,396 INFO L231 Difference]: Finished difference. Result has 80 places, 81 transitions, 218 flow [2025-03-17 14:23:43,396 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=218, PETRI_PLACES=80, PETRI_TRANSITIONS=81} [2025-03-17 14:23:43,397 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 2 predicate places. [2025-03-17 14:23:43,397 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 81 transitions, 218 flow [2025-03-17 14:23:43,397 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:43,397 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:43,397 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:23:43,397 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-03-17 14:23:43,397 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-17 14:23:43,398 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:43,398 INFO L85 PathProgramCache]: Analyzing trace with hash -669343651, now seen corresponding path program 1 times [2025-03-17 14:23:43,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:43,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953273549] [2025-03-17 14:23:43,398 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:43,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:43,403 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-17 14:23:43,409 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-17 14:23:43,409 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:43,410 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:43,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:23:43,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:43,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953273549] [2025-03-17 14:23:43,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953273549] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:23:43,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283869119] [2025-03-17 14:23:43,550 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:43,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:23:43,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:23:43,552 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:23:43,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-17 14:23:43,597 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-17 14:23:43,613 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-17 14:23:43,613 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:43,613 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:43,614 INFO L256 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-03-17 14:23:43,615 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:23:43,675 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-03-17 14:23:43,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:23:43,680 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 14:23:43,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283869119] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:23:43,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 14:23:43,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2025-03-17 14:23:43,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942910553] [2025-03-17 14:23:43,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:23:43,681 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:23:43,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:43,681 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:23:43,681 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-03-17 14:23:43,733 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 82 [2025-03-17 14:23:43,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 81 transitions, 218 flow. Second operand has 4 states, 4 states have (on average 46.25) internal successors, (185), 4 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:43,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:43,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 82 [2025-03-17 14:23:43,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:23:43,832 INFO L124 PetriNetUnfolderBase]: 188/560 cut-off events. [2025-03-17 14:23:43,832 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-17 14:23:43,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 908 conditions, 560 events. 188/560 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3277 event pairs, 112 based on Foata normal form. 0/417 useless extension candidates. Maximal degree in co-relation 846. Up to 309 conditions per place. [2025-03-17 14:23:43,835 INFO L140 encePairwiseOnDemand]: 77/82 looper letters, 44 selfloop transitions, 5 changer transitions 0/84 dead transitions. [2025-03-17 14:23:43,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 84 transitions, 322 flow [2025-03-17 14:23:43,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:23:43,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:23:43,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 216 transitions. [2025-03-17 14:23:43,836 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6585365853658537 [2025-03-17 14:23:43,836 INFO L175 Difference]: Start difference. First operand has 80 places, 81 transitions, 218 flow. Second operand 4 states and 216 transitions. [2025-03-17 14:23:43,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 84 transitions, 322 flow [2025-03-17 14:23:43,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 84 transitions, 316 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:23:43,839 INFO L231 Difference]: Finished difference. Result has 82 places, 83 transitions, 236 flow [2025-03-17 14:23:43,839 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=236, PETRI_PLACES=82, PETRI_TRANSITIONS=83} [2025-03-17 14:23:43,840 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 4 predicate places. [2025-03-17 14:23:43,840 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 83 transitions, 236 flow [2025-03-17 14:23:43,840 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.25) internal successors, (185), 4 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:43,841 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:43,841 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:23:43,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-17 14:23:44,045 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:23:44,045 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-17 14:23:44,045 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:44,046 INFO L85 PathProgramCache]: Analyzing trace with hash 725186133, now seen corresponding path program 1 times [2025-03-17 14:23:44,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:44,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488318264] [2025-03-17 14:23:44,046 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:44,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:44,053 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-17 14:23:44,059 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-17 14:23:44,060 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:44,060 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:44,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:23:44,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:44,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488318264] [2025-03-17 14:23:44,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488318264] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:23:44,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:23:44,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 14:23:44,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919667781] [2025-03-17 14:23:44,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:23:44,101 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:23:44,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:44,102 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:23:44,102 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:23:44,119 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 82 [2025-03-17 14:23:44,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 83 transitions, 236 flow. Second operand has 4 states, 4 states have (on average 48.25) internal successors, (193), 4 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:44,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:44,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 82 [2025-03-17 14:23:44,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:23:44,198 INFO L124 PetriNetUnfolderBase]: 187/559 cut-off events. [2025-03-17 14:23:44,198 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-03-17 14:23:44,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 910 conditions, 559 events. 187/559 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3260 event pairs, 112 based on Foata normal form. 1/420 useless extension candidates. Maximal degree in co-relation 846. Up to 306 conditions per place. [2025-03-17 14:23:44,201 INFO L140 encePairwiseOnDemand]: 78/82 looper letters, 42 selfloop transitions, 4 changer transitions 0/83 dead transitions. [2025-03-17 14:23:44,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 83 transitions, 325 flow [2025-03-17 14:23:44,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:23:44,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:23:44,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 221 transitions. [2025-03-17 14:23:44,202 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6737804878048781 [2025-03-17 14:23:44,202 INFO L175 Difference]: Start difference. First operand has 82 places, 83 transitions, 236 flow. Second operand 4 states and 221 transitions. [2025-03-17 14:23:44,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 83 transitions, 325 flow [2025-03-17 14:23:44,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 83 transitions, 320 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:23:44,203 INFO L231 Difference]: Finished difference. Result has 83 places, 82 transitions, 234 flow [2025-03-17 14:23:44,204 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=234, PETRI_PLACES=83, PETRI_TRANSITIONS=82} [2025-03-17 14:23:44,204 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 5 predicate places. [2025-03-17 14:23:44,204 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 82 transitions, 234 flow [2025-03-17 14:23:44,204 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.25) internal successors, (193), 4 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:44,204 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:44,204 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:23:44,204 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-03-17 14:23:44,204 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-17 14:23:44,205 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:44,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1005870843, now seen corresponding path program 1 times [2025-03-17 14:23:44,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:44,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365070235] [2025-03-17 14:23:44,205 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:44,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:44,210 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-17 14:23:44,218 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-17 14:23:44,218 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:44,218 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:44,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:23:44,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:44,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365070235] [2025-03-17 14:23:44,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365070235] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:23:44,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680923536] [2025-03-17 14:23:44,288 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:44,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:23:44,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:23:44,290 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:23:44,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-17 14:23:44,335 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-17 14:23:44,350 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-17 14:23:44,350 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:44,350 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:44,351 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-17 14:23:44,352 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:23:44,417 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:23:44,417 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:23:44,467 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:23:44,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680923536] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:23:44,467 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:23:44,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2025-03-17 14:23:44,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651816099] [2025-03-17 14:23:44,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:23:44,468 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-17 14:23:44,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:44,468 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-17 14:23:44,468 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2025-03-17 14:23:44,599 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 82 [2025-03-17 14:23:44,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 82 transitions, 234 flow. Second operand has 14 states, 14 states have (on average 47.785714285714285) internal successors, (669), 14 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:44,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:44,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 82 [2025-03-17 14:23:44,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:23:44,856 INFO L124 PetriNetUnfolderBase]: 370/1106 cut-off events. [2025-03-17 14:23:44,856 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2025-03-17 14:23:44,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1779 conditions, 1106 events. 370/1106 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7859 event pairs, 224 based on Foata normal form. 1/834 useless extension candidates. Maximal degree in co-relation 846. Up to 301 conditions per place. [2025-03-17 14:23:44,861 INFO L140 encePairwiseOnDemand]: 72/82 looper letters, 59 selfloop transitions, 21 changer transitions 0/117 dead transitions. [2025-03-17 14:23:44,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 117 transitions, 498 flow [2025-03-17 14:23:44,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 14:23:44,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 14:23:44,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 485 transitions. [2025-03-17 14:23:44,864 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6571815718157181 [2025-03-17 14:23:44,864 INFO L175 Difference]: Start difference. First operand has 83 places, 82 transitions, 234 flow. Second operand 9 states and 485 transitions. [2025-03-17 14:23:44,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 117 transitions, 498 flow [2025-03-17 14:23:44,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 117 transitions, 484 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-17 14:23:44,866 INFO L231 Difference]: Finished difference. Result has 92 places, 92 transitions, 347 flow [2025-03-17 14:23:44,867 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=347, PETRI_PLACES=92, PETRI_TRANSITIONS=92} [2025-03-17 14:23:44,868 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 14 predicate places. [2025-03-17 14:23:44,868 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 92 transitions, 347 flow [2025-03-17 14:23:44,869 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 47.785714285714285) internal successors, (669), 14 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:44,869 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:44,869 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:23:44,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-17 14:23:45,074 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:23:45,074 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-17 14:23:45,074 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:45,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1117227895, now seen corresponding path program 1 times [2025-03-17 14:23:45,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:45,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869829753] [2025-03-17 14:23:45,074 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:45,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:45,084 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-17 14:23:45,092 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-17 14:23:45,092 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:45,092 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:45,223 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:23:45,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:45,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869829753] [2025-03-17 14:23:45,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869829753] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:23:45,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492672642] [2025-03-17 14:23:45,224 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:45,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:23:45,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:23:45,226 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:23:45,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-17 14:23:45,272 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-17 14:23:45,290 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-17 14:23:45,291 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:45,291 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:45,292 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-03-17 14:23:45,293 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:23:45,331 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-03-17 14:23:45,338 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 14:23:45,338 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 14:23:45,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492672642] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:23:45,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 14:23:45,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2025-03-17 14:23:45,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570965299] [2025-03-17 14:23:45,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:23:45,339 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:23:45,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:45,339 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:23:45,339 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2025-03-17 14:23:45,382 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 82 [2025-03-17 14:23:45,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 92 transitions, 347 flow. Second operand has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:45,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:45,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 82 [2025-03-17 14:23:45,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:23:45,502 INFO L124 PetriNetUnfolderBase]: 372/1112 cut-off events. [2025-03-17 14:23:45,502 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2025-03-17 14:23:45,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1830 conditions, 1112 events. 372/1112 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7925 event pairs, 224 based on Foata normal form. 0/831 useless extension candidates. Maximal degree in co-relation 884. Up to 612 conditions per place. [2025-03-17 14:23:45,508 INFO L140 encePairwiseOnDemand]: 77/82 looper letters, 55 selfloop transitions, 5 changer transitions 0/95 dead transitions. [2025-03-17 14:23:45,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 95 transitions, 473 flow [2025-03-17 14:23:45,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:23:45,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:23:45,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 216 transitions. [2025-03-17 14:23:45,509 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6585365853658537 [2025-03-17 14:23:45,509 INFO L175 Difference]: Start difference. First operand has 92 places, 92 transitions, 347 flow. Second operand 4 states and 216 transitions. [2025-03-17 14:23:45,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 95 transitions, 473 flow [2025-03-17 14:23:45,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 95 transitions, 466 flow, removed 1 selfloop flow, removed 2 redundant places. [2025-03-17 14:23:45,511 INFO L231 Difference]: Finished difference. Result has 94 places, 94 transitions, 364 flow [2025-03-17 14:23:45,511 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=340, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=364, PETRI_PLACES=94, PETRI_TRANSITIONS=94} [2025-03-17 14:23:45,512 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 16 predicate places. [2025-03-17 14:23:45,512 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 94 transitions, 364 flow [2025-03-17 14:23:45,512 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:45,512 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:45,512 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:23:45,518 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-17 14:23:45,712 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-03-17 14:23:45,713 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-17 14:23:45,713 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:45,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1059778497, now seen corresponding path program 2 times [2025-03-17 14:23:45,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:45,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116139712] [2025-03-17 14:23:45,714 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:23:45,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:45,721 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 13 statements into 2 equivalence classes. [2025-03-17 14:23:45,735 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 13 of 13 statements. [2025-03-17 14:23:45,736 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:23:45,736 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:45,869 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-17 14:23:45,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:45,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116139712] [2025-03-17 14:23:45,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116139712] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:23:45,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013063372] [2025-03-17 14:23:45,869 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:23:45,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:23:45,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:23:45,871 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:23:45,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-17 14:23:45,917 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 13 statements into 2 equivalence classes. [2025-03-17 14:23:45,940 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 13 of 13 statements. [2025-03-17 14:23:45,940 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:23:45,940 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:45,941 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-17 14:23:45,943 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:23:45,975 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-03-17 14:23:46,039 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:23:46,039 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:23:46,131 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-17 14:23:46,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013063372] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:23:46,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:23:46,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 12 [2025-03-17 14:23:46,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856193691] [2025-03-17 14:23:46,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:23:46,131 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-17 14:23:46,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:46,132 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-17 14:23:46,132 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2025-03-17 14:23:46,446 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 82 [2025-03-17 14:23:46,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 94 transitions, 364 flow. Second operand has 14 states, 14 states have (on average 46.142857142857146) internal successors, (646), 14 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:46,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:46,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 82 [2025-03-17 14:23:46,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:23:46,670 INFO L124 PetriNetUnfolderBase]: 372/1111 cut-off events. [2025-03-17 14:23:46,670 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2025-03-17 14:23:46,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1843 conditions, 1111 events. 372/1111 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7927 event pairs, 224 based on Foata normal form. 0/834 useless extension candidates. Maximal degree in co-relation 891. Up to 599 conditions per place. [2025-03-17 14:23:46,675 INFO L140 encePairwiseOnDemand]: 73/82 looper letters, 42 selfloop transitions, 17 changer transitions 0/94 dead transitions. [2025-03-17 14:23:46,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 94 transitions, 482 flow [2025-03-17 14:23:46,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-17 14:23:46,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-17 14:23:46,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 394 transitions. [2025-03-17 14:23:46,677 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.600609756097561 [2025-03-17 14:23:46,677 INFO L175 Difference]: Start difference. First operand has 94 places, 94 transitions, 364 flow. Second operand 8 states and 394 transitions. [2025-03-17 14:23:46,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 94 transitions, 482 flow [2025-03-17 14:23:46,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 94 transitions, 476 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:23:46,678 INFO L231 Difference]: Finished difference. Result has 98 places, 94 transitions, 392 flow [2025-03-17 14:23:46,679 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=392, PETRI_PLACES=98, PETRI_TRANSITIONS=94} [2025-03-17 14:23:46,679 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 20 predicate places. [2025-03-17 14:23:46,679 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 94 transitions, 392 flow [2025-03-17 14:23:46,679 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 46.142857142857146) internal successors, (646), 14 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:46,679 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:46,680 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:23:46,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-17 14:23:46,881 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:23:46,881 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-17 14:23:46,882 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:46,882 INFO L85 PathProgramCache]: Analyzing trace with hash -85702893, now seen corresponding path program 1 times [2025-03-17 14:23:46,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:46,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884869165] [2025-03-17 14:23:46,882 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:46,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:46,888 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-17 14:23:46,906 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-17 14:23:46,906 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:46,906 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:46,948 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 14:23:46,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:46,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884869165] [2025-03-17 14:23:46,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884869165] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:23:46,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:23:46,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 14:23:46,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201952528] [2025-03-17 14:23:46,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:23:46,950 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:23:46,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:46,950 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:23:46,950 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:23:46,965 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 82 [2025-03-17 14:23:46,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 94 transitions, 392 flow. Second operand has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:46,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:46,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 82 [2025-03-17 14:23:46,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:23:47,101 INFO L124 PetriNetUnfolderBase]: 370/1109 cut-off events. [2025-03-17 14:23:47,101 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2025-03-17 14:23:47,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1848 conditions, 1109 events. 370/1109 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 7807 event pairs, 224 based on Foata normal form. 2/837 useless extension candidates. Maximal degree in co-relation 891. Up to 607 conditions per place. [2025-03-17 14:23:47,110 INFO L140 encePairwiseOnDemand]: 78/82 looper letters, 54 selfloop transitions, 4 changer transitions 0/94 dead transitions. [2025-03-17 14:23:47,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 94 transitions, 506 flow [2025-03-17 14:23:47,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:23:47,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:23:47,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 221 transitions. [2025-03-17 14:23:47,113 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6737804878048781 [2025-03-17 14:23:47,113 INFO L175 Difference]: Start difference. First operand has 98 places, 94 transitions, 392 flow. Second operand 4 states and 221 transitions. [2025-03-17 14:23:47,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 94 transitions, 506 flow [2025-03-17 14:23:47,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 94 transitions, 454 flow, removed 3 selfloop flow, removed 7 redundant places. [2025-03-17 14:23:47,115 INFO L231 Difference]: Finished difference. Result has 94 places, 93 transitions, 344 flow [2025-03-17 14:23:47,116 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=336, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=344, PETRI_PLACES=94, PETRI_TRANSITIONS=93} [2025-03-17 14:23:47,116 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 16 predicate places. [2025-03-17 14:23:47,116 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 93 transitions, 344 flow [2025-03-17 14:23:47,117 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:47,117 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:47,117 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:23:47,117 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2025-03-17 14:23:47,117 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-17 14:23:47,117 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:47,117 INFO L85 PathProgramCache]: Analyzing trace with hash -85789860, now seen corresponding path program 1 times [2025-03-17 14:23:47,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:47,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384853094] [2025-03-17 14:23:47,118 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:47,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:47,124 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-17 14:23:47,129 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-17 14:23:47,129 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:47,129 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:47,220 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:23:47,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:47,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384853094] [2025-03-17 14:23:47,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384853094] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:23:47,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086043141] [2025-03-17 14:23:47,220 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:47,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:23:47,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:23:47,222 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:23:47,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-17 14:23:47,272 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-17 14:23:47,291 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-17 14:23:47,292 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:47,292 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:47,295 INFO L256 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-17 14:23:47,296 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:23:47,352 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:23:47,353 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:23:47,401 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:23:47,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086043141] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:23:47,403 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:23:47,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2025-03-17 14:23:47,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298817215] [2025-03-17 14:23:47,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:23:47,404 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-17 14:23:47,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:47,405 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-17 14:23:47,405 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2025-03-17 14:23:47,553 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 82 [2025-03-17 14:23:47,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 93 transitions, 344 flow. Second operand has 14 states, 14 states have (on average 48.0) internal successors, (672), 14 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:47,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:47,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 82 [2025-03-17 14:23:47,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:23:47,826 INFO L124 PetriNetUnfolderBase]: 731/2187 cut-off events. [2025-03-17 14:23:47,826 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2025-03-17 14:23:47,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3515 conditions, 2187 events. 731/2187 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 18255 event pairs, 448 based on Foata normal form. 2/1650 useless extension candidates. Maximal degree in co-relation 1727. Up to 596 conditions per place. [2025-03-17 14:23:47,836 INFO L140 encePairwiseOnDemand]: 71/82 looper letters, 66 selfloop transitions, 22 changer transitions 0/124 dead transitions. [2025-03-17 14:23:47,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 124 transitions, 614 flow [2025-03-17 14:23:47,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-17 14:23:47,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-17 14:23:47,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 436 transitions. [2025-03-17 14:23:47,838 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6646341463414634 [2025-03-17 14:23:47,838 INFO L175 Difference]: Start difference. First operand has 94 places, 93 transitions, 344 flow. Second operand 8 states and 436 transitions. [2025-03-17 14:23:47,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 124 transitions, 614 flow [2025-03-17 14:23:47,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 124 transitions, 600 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-17 14:23:47,840 INFO L231 Difference]: Finished difference. Result has 101 places, 97 transitions, 422 flow [2025-03-17 14:23:47,840 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=336, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=422, PETRI_PLACES=101, PETRI_TRANSITIONS=97} [2025-03-17 14:23:47,841 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 23 predicate places. [2025-03-17 14:23:47,841 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 97 transitions, 422 flow [2025-03-17 14:23:47,841 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 48.0) internal successors, (672), 14 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:47,841 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:47,841 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:23:47,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-17 14:23:48,041 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:23:48,042 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-17 14:23:48,042 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:48,042 INFO L85 PathProgramCache]: Analyzing trace with hash -839562824, now seen corresponding path program 1 times [2025-03-17 14:23:48,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:48,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027039516] [2025-03-17 14:23:48,042 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:48,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:48,048 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-17 14:23:48,056 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-17 14:23:48,056 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:48,056 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:48,198 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-17 14:23:48,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:48,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027039516] [2025-03-17 14:23:48,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027039516] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:23:48,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:23:48,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 14:23:48,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638767002] [2025-03-17 14:23:48,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:23:48,199 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:23:48,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:48,199 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:23:48,199 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-17 14:23:48,258 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 82 [2025-03-17 14:23:48,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 97 transitions, 422 flow. Second operand has 5 states, 5 states have (on average 42.0) internal successors, (210), 5 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:48,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:48,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 82 [2025-03-17 14:23:48,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:23:48,424 INFO L124 PetriNetUnfolderBase]: 819/2271 cut-off events. [2025-03-17 14:23:48,425 INFO L125 PetriNetUnfolderBase]: For 38/38 co-relation queries the response was YES. [2025-03-17 14:23:48,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3783 conditions, 2271 events. 819/2271 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 18538 event pairs, 520 based on Foata normal form. 0/1838 useless extension candidates. Maximal degree in co-relation 1856. Up to 1316 conditions per place. [2025-03-17 14:23:48,434 INFO L140 encePairwiseOnDemand]: 75/82 looper letters, 55 selfloop transitions, 7 changer transitions 0/93 dead transitions. [2025-03-17 14:23:48,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 93 transitions, 538 flow [2025-03-17 14:23:48,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:23:48,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:23:48,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 234 transitions. [2025-03-17 14:23:48,436 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5707317073170731 [2025-03-17 14:23:48,436 INFO L175 Difference]: Start difference. First operand has 101 places, 97 transitions, 422 flow. Second operand 5 states and 234 transitions. [2025-03-17 14:23:48,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 93 transitions, 538 flow [2025-03-17 14:23:48,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 93 transitions, 512 flow, removed 1 selfloop flow, removed 2 redundant places. [2025-03-17 14:23:48,438 INFO L231 Difference]: Finished difference. Result has 99 places, 93 transitions, 402 flow [2025-03-17 14:23:48,438 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=402, PETRI_PLACES=99, PETRI_TRANSITIONS=93} [2025-03-17 14:23:48,438 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 21 predicate places. [2025-03-17 14:23:48,438 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 93 transitions, 402 flow [2025-03-17 14:23:48,439 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.0) internal successors, (210), 5 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:48,439 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:48,439 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:23:48,439 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2025-03-17 14:23:48,439 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-17 14:23:48,439 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:48,439 INFO L85 PathProgramCache]: Analyzing trace with hash -839562823, now seen corresponding path program 1 times [2025-03-17 14:23:48,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:48,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839053403] [2025-03-17 14:23:48,440 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:48,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:48,446 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-17 14:23:48,455 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-17 14:23:48,456 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:48,456 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:48,743 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-17 14:23:48,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:48,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839053403] [2025-03-17 14:23:48,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839053403] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:23:48,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323816510] [2025-03-17 14:23:48,743 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:48,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:23:48,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:23:48,746 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:23:48,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-17 14:23:48,807 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-17 14:23:48,831 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-17 14:23:48,831 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:48,831 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:48,833 INFO L256 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-03-17 14:23:48,835 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:23:48,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-17 14:23:48,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-17 14:23:48,902 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 14 [2025-03-17 14:23:48,923 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2025-03-17 14:23:48,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2025-03-17 14:23:48,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-17 14:23:48,993 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 14 [2025-03-17 14:23:49,016 INFO L349 Elim1Store]: treesize reduction 40, result has 32.2 percent of original size [2025-03-17 14:23:49,016 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 24 treesize of output 28 [2025-03-17 14:23:49,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-17 14:23:49,064 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 14 [2025-03-17 14:23:49,077 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2025-03-17 14:23:49,077 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2025-03-17 14:23:49,114 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-17 14:23:49,114 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 14:23:49,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323816510] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:23:49,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 14:23:49,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 9 [2025-03-17 14:23:49,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557937935] [2025-03-17 14:23:49,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:23:49,114 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 14:23:49,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:49,115 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 14:23:49,115 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2025-03-17 14:23:49,251 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 82 [2025-03-17 14:23:49,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 93 transitions, 402 flow. Second operand has 6 states, 6 states have (on average 38.5) internal successors, (231), 6 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:49,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:49,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 82 [2025-03-17 14:23:49,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:23:49,407 INFO L124 PetriNetUnfolderBase]: 731/1987 cut-off events. [2025-03-17 14:23:49,407 INFO L125 PetriNetUnfolderBase]: For 43/43 co-relation queries the response was YES. [2025-03-17 14:23:49,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3344 conditions, 1987 events. 731/1987 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 15426 event pairs, 448 based on Foata normal form. 80/1651 useless extension candidates. Maximal degree in co-relation 1638. Up to 1186 conditions per place. [2025-03-17 14:23:49,420 INFO L140 encePairwiseOnDemand]: 76/82 looper letters, 58 selfloop transitions, 3 changer transitions 0/89 dead transitions. [2025-03-17 14:23:49,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 89 transitions, 516 flow [2025-03-17 14:23:49,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:23:49,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:23:49,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 182 transitions. [2025-03-17 14:23:49,422 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5548780487804879 [2025-03-17 14:23:49,422 INFO L175 Difference]: Start difference. First operand has 99 places, 93 transitions, 402 flow. Second operand 4 states and 182 transitions. [2025-03-17 14:23:49,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 89 transitions, 516 flow [2025-03-17 14:23:49,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 89 transitions, 506 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-17 14:23:49,424 INFO L231 Difference]: Finished difference. Result has 95 places, 89 transitions, 390 flow [2025-03-17 14:23:49,425 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=390, PETRI_PLACES=95, PETRI_TRANSITIONS=89} [2025-03-17 14:23:49,425 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 17 predicate places. [2025-03-17 14:23:49,425 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 89 transitions, 390 flow [2025-03-17 14:23:49,425 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 38.5) internal successors, (231), 6 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:49,425 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:49,425 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:23:49,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-17 14:23:49,626 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-03-17 14:23:49,626 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-17 14:23:49,627 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:49,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1590872819, now seen corresponding path program 2 times [2025-03-17 14:23:49,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:49,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88670642] [2025-03-17 14:23:49,627 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:23:49,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:49,634 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-03-17 14:23:49,641 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-03-17 14:23:49,641 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:23:49,641 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:49,832 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-17 14:23:49,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:49,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88670642] [2025-03-17 14:23:49,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88670642] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:23:49,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179490630] [2025-03-17 14:23:49,832 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:23:49,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:23:49,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:23:49,835 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:23:49,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-17 14:23:49,884 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-03-17 14:23:49,911 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-03-17 14:23:49,911 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:23:49,911 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:49,913 INFO L256 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-03-17 14:23:49,915 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:23:49,964 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2025-03-17 14:23:50,028 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-17 14:23:50,028 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:23:50,209 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-17 14:23:50,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179490630] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:23:50,209 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:23:50,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2025-03-17 14:23:50,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865841971] [2025-03-17 14:23:50,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:23:50,210 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-17 14:23:50,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:50,210 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-17 14:23:50,210 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2025-03-17 14:23:50,845 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 82 [2025-03-17 14:23:50,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 89 transitions, 390 flow. Second operand has 22 states, 22 states have (on average 45.81818181818182) internal successors, (1008), 22 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:50,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:50,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 82 [2025-03-17 14:23:50,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:23:51,344 INFO L124 PetriNetUnfolderBase]: 1100/2987 cut-off events. [2025-03-17 14:23:51,344 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2025-03-17 14:23:51,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5022 conditions, 2987 events. 1100/2987 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 25224 event pairs, 672 based on Foata normal form. 0/2371 useless extension candidates. Maximal degree in co-relation 2487. Up to 1158 conditions per place. [2025-03-17 14:23:51,357 INFO L140 encePairwiseOnDemand]: 73/82 looper letters, 75 selfloop transitions, 33 changer transitions 0/135 dead transitions. [2025-03-17 14:23:51,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 135 transitions, 788 flow [2025-03-17 14:23:51,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-17 14:23:51,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-03-17 14:23:51,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 787 transitions. [2025-03-17 14:23:51,359 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5998475609756098 [2025-03-17 14:23:51,360 INFO L175 Difference]: Start difference. First operand has 95 places, 89 transitions, 390 flow. Second operand 16 states and 787 transitions. [2025-03-17 14:23:51,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 135 transitions, 788 flow [2025-03-17 14:23:51,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 135 transitions, 784 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:23:51,364 INFO L231 Difference]: Finished difference. Result has 112 places, 107 transitions, 590 flow [2025-03-17 14:23:51,364 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=590, PETRI_PLACES=112, PETRI_TRANSITIONS=107} [2025-03-17 14:23:51,365 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 34 predicate places. [2025-03-17 14:23:51,365 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 107 transitions, 590 flow [2025-03-17 14:23:51,365 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 45.81818181818182) internal successors, (1008), 22 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:51,366 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:51,366 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:23:51,374 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-17 14:23:51,570 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-03-17 14:23:51,570 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-17 14:23:51,570 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:51,571 INFO L85 PathProgramCache]: Analyzing trace with hash -256642872, now seen corresponding path program 1 times [2025-03-17 14:23:51,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:51,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126863805] [2025-03-17 14:23:51,571 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:51,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:51,577 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-17 14:23:51,584 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-17 14:23:51,584 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:51,584 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:51,666 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-17 14:23:51,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:51,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126863805] [2025-03-17 14:23:51,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126863805] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:23:51,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:23:51,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 14:23:51,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368242841] [2025-03-17 14:23:51,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:23:51,667 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:23:51,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:51,668 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:23:51,668 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-17 14:23:51,735 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 82 [2025-03-17 14:23:51,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 107 transitions, 590 flow. Second operand has 5 states, 5 states have (on average 42.2) internal successors, (211), 5 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:51,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:51,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 82 [2025-03-17 14:23:51,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:23:51,951 INFO L124 PetriNetUnfolderBase]: 1256/2999 cut-off events. [2025-03-17 14:23:51,951 INFO L125 PetriNetUnfolderBase]: For 98/98 co-relation queries the response was YES. [2025-03-17 14:23:51,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5358 conditions, 2999 events. 1256/2999 cut-off events. For 98/98 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 23478 event pairs, 792 based on Foata normal form. 0/2615 useless extension candidates. Maximal degree in co-relation 5315. Up to 2018 conditions per place. [2025-03-17 14:23:51,966 INFO L140 encePairwiseOnDemand]: 76/82 looper letters, 73 selfloop transitions, 7 changer transitions 0/103 dead transitions. [2025-03-17 14:23:51,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 103 transitions, 742 flow [2025-03-17 14:23:51,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:23:51,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:23:51,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 195 transitions. [2025-03-17 14:23:51,967 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5945121951219512 [2025-03-17 14:23:51,967 INFO L175 Difference]: Start difference. First operand has 112 places, 107 transitions, 590 flow. Second operand 4 states and 195 transitions. [2025-03-17 14:23:51,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 103 transitions, 742 flow [2025-03-17 14:23:51,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 103 transitions, 688 flow, removed 17 selfloop flow, removed 4 redundant places. [2025-03-17 14:23:51,971 INFO L231 Difference]: Finished difference. Result has 107 places, 103 transitions, 542 flow [2025-03-17 14:23:51,971 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=528, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=542, PETRI_PLACES=107, PETRI_TRANSITIONS=103} [2025-03-17 14:23:51,972 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 29 predicate places. [2025-03-17 14:23:51,972 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 103 transitions, 542 flow [2025-03-17 14:23:51,972 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.2) internal successors, (211), 5 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:51,972 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:51,972 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:23:51,972 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2025-03-17 14:23:51,972 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-17 14:23:51,973 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:51,973 INFO L85 PathProgramCache]: Analyzing trace with hash -256642871, now seen corresponding path program 1 times [2025-03-17 14:23:51,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:51,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973109377] [2025-03-17 14:23:51,973 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:51,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:51,979 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-17 14:23:51,993 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-17 14:23:51,993 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:51,994 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:52,186 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 14:23:52,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:52,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973109377] [2025-03-17 14:23:52,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973109377] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:23:52,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292924680] [2025-03-17 14:23:52,187 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:52,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:23:52,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:23:52,189 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:23:52,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-17 14:23:52,241 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-17 14:23:52,272 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-17 14:23:52,272 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:52,272 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:52,273 INFO L256 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-03-17 14:23:52,275 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:23:52,281 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-17 14:23:52,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-17 14:23:52,330 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 14 [2025-03-17 14:23:52,340 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2025-03-17 14:23:52,341 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2025-03-17 14:23:52,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-17 14:23:52,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 14 [2025-03-17 14:23:52,382 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-17 14:23:52,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-03-17 14:23:52,427 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-17 14:23:52,427 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 14:23:52,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292924680] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:23:52,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 14:23:52,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2025-03-17 14:23:52,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760896244] [2025-03-17 14:23:52,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:23:52,428 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 14:23:52,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:52,429 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 14:23:52,429 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2025-03-17 14:23:52,544 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 82 [2025-03-17 14:23:52,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 103 transitions, 542 flow. Second operand has 7 states, 7 states have (on average 37.285714285714285) internal successors, (261), 7 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:52,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:52,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 82 [2025-03-17 14:23:52,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:23:52,735 INFO L124 PetriNetUnfolderBase]: 1256/2849 cut-off events. [2025-03-17 14:23:52,735 INFO L125 PetriNetUnfolderBase]: For 84/84 co-relation queries the response was YES. [2025-03-17 14:23:52,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5171 conditions, 2849 events. 1256/2849 cut-off events. For 84/84 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 21280 event pairs, 792 based on Foata normal form. 0/2465 useless extension candidates. Maximal degree in co-relation 5132. Up to 2018 conditions per place. [2025-03-17 14:23:52,750 INFO L140 encePairwiseOnDemand]: 75/82 looper letters, 71 selfloop transitions, 9 changer transitions 0/99 dead transitions. [2025-03-17 14:23:52,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 99 transitions, 694 flow [2025-03-17 14:23:52,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:23:52,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:23:52,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 214 transitions. [2025-03-17 14:23:52,752 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5219512195121951 [2025-03-17 14:23:52,752 INFO L175 Difference]: Start difference. First operand has 107 places, 103 transitions, 542 flow. Second operand 5 states and 214 transitions. [2025-03-17 14:23:52,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 99 transitions, 694 flow [2025-03-17 14:23:52,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 99 transitions, 686 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:23:52,756 INFO L231 Difference]: Finished difference. Result has 105 places, 99 transitions, 544 flow [2025-03-17 14:23:52,756 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=526, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=544, PETRI_PLACES=105, PETRI_TRANSITIONS=99} [2025-03-17 14:23:52,756 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 27 predicate places. [2025-03-17 14:23:52,756 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 99 transitions, 544 flow [2025-03-17 14:23:52,757 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 37.285714285714285) internal successors, (261), 7 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:52,757 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:52,757 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:23:52,767 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-03-17 14:23:52,961 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:23:52,961 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-17 14:23:52,961 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:52,961 INFO L85 PathProgramCache]: Analyzing trace with hash 634006460, now seen corresponding path program 1 times [2025-03-17 14:23:52,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:52,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61076504] [2025-03-17 14:23:52,962 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:52,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:52,971 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-17 14:23:52,979 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-17 14:23:52,979 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:52,979 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:53,143 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 14:23:53,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:53,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61076504] [2025-03-17 14:23:53,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61076504] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:23:53,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841863618] [2025-03-17 14:23:53,144 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:53,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:23:53,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:23:53,147 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:23:53,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-17 14:23:53,205 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-17 14:23:53,225 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-17 14:23:53,225 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:53,225 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:53,226 INFO L256 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-17 14:23:53,227 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:23:53,262 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-17 14:23:53,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-17 14:23:53,310 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-17 14:23:53,315 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-17 14:23:53,315 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-03-17 14:23:53,352 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 14:23:53,352 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:23:53,432 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2025-03-17 14:23:53,492 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 14:23:53,492 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 37 [2025-03-17 14:23:53,543 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 14:23:53,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841863618] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:23:53,544 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:23:53,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2025-03-17 14:23:53,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462648133] [2025-03-17 14:23:53,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:23:53,544 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-17 14:23:53,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:53,545 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-17 14:23:53,545 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2025-03-17 14:23:54,331 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 82 [2025-03-17 14:23:54,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 99 transitions, 544 flow. Second operand has 18 states, 18 states have (on average 44.611111111111114) internal successors, (803), 18 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:54,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:54,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 82 [2025-03-17 14:23:54,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:23:54,823 INFO L124 PetriNetUnfolderBase]: 1304/3128 cut-off events. [2025-03-17 14:23:54,824 INFO L125 PetriNetUnfolderBase]: For 83/83 co-relation queries the response was YES. [2025-03-17 14:23:54,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5572 conditions, 3128 events. 1304/3128 cut-off events. For 83/83 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 24594 event pairs, 558 based on Foata normal form. 0/2744 useless extension candidates. Maximal degree in co-relation 5533. Up to 857 conditions per place. [2025-03-17 14:23:54,835 INFO L140 encePairwiseOnDemand]: 67/82 looper letters, 98 selfloop transitions, 36 changer transitions 0/152 dead transitions. [2025-03-17 14:23:54,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 152 transitions, 986 flow [2025-03-17 14:23:54,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-17 14:23:54,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-03-17 14:23:54,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 637 transitions. [2025-03-17 14:23:54,837 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2025-03-17 14:23:54,837 INFO L175 Difference]: Start difference. First operand has 105 places, 99 transitions, 544 flow. Second operand 13 states and 637 transitions. [2025-03-17 14:23:54,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 152 transitions, 986 flow [2025-03-17 14:23:54,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 152 transitions, 974 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-17 14:23:54,840 INFO L231 Difference]: Finished difference. Result has 119 places, 109 transitions, 719 flow [2025-03-17 14:23:54,841 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=532, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=719, PETRI_PLACES=119, PETRI_TRANSITIONS=109} [2025-03-17 14:23:54,841 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 41 predicate places. [2025-03-17 14:23:54,841 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 109 transitions, 719 flow [2025-03-17 14:23:54,841 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 44.611111111111114) internal successors, (803), 18 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:54,841 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:54,841 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:23:54,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-03-17 14:23:55,042 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2025-03-17 14:23:55,042 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-17 14:23:55,042 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:55,042 INFO L85 PathProgramCache]: Analyzing trace with hash 634006459, now seen corresponding path program 1 times [2025-03-17 14:23:55,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:55,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353667874] [2025-03-17 14:23:55,043 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:55,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:55,048 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-17 14:23:55,052 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-17 14:23:55,052 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:55,052 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:55,100 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-17 14:23:55,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:55,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353667874] [2025-03-17 14:23:55,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353667874] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:23:55,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:23:55,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 14:23:55,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898612619] [2025-03-17 14:23:55,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:23:55,101 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:23:55,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:55,101 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:23:55,101 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-17 14:23:55,164 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 82 [2025-03-17 14:23:55,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 109 transitions, 719 flow. Second operand has 5 states, 5 states have (on average 45.4) internal successors, (227), 5 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:55,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:55,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 82 [2025-03-17 14:23:55,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:23:55,353 INFO L124 PetriNetUnfolderBase]: 1208/2846 cut-off events. [2025-03-17 14:23:55,353 INFO L125 PetriNetUnfolderBase]: For 471/516 co-relation queries the response was YES. [2025-03-17 14:23:55,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5534 conditions, 2846 events. 1208/2846 cut-off events. For 471/516 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 21676 event pairs, 735 based on Foata normal form. 174/2696 useless extension candidates. Maximal degree in co-relation 5491. Up to 1903 conditions per place. [2025-03-17 14:23:55,366 INFO L140 encePairwiseOnDemand]: 77/82 looper letters, 67 selfloop transitions, 22 changer transitions 0/107 dead transitions. [2025-03-17 14:23:55,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 107 transitions, 893 flow [2025-03-17 14:23:55,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:23:55,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:23:55,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 246 transitions. [2025-03-17 14:23:55,367 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6 [2025-03-17 14:23:55,367 INFO L175 Difference]: Start difference. First operand has 119 places, 109 transitions, 719 flow. Second operand 5 states and 246 transitions. [2025-03-17 14:23:55,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 107 transitions, 893 flow [2025-03-17 14:23:55,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 107 transitions, 841 flow, removed 0 selfloop flow, removed 8 redundant places. [2025-03-17 14:23:55,371 INFO L231 Difference]: Finished difference. Result has 113 places, 107 transitions, 707 flow [2025-03-17 14:23:55,371 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=663, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=707, PETRI_PLACES=113, PETRI_TRANSITIONS=107} [2025-03-17 14:23:55,371 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 35 predicate places. [2025-03-17 14:23:55,371 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 107 transitions, 707 flow [2025-03-17 14:23:55,371 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 45.4) internal successors, (227), 5 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:55,371 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:55,372 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] [2025-03-17 14:23:55,372 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2025-03-17 14:23:55,372 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-17 14:23:55,372 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:55,372 INFO L85 PathProgramCache]: Analyzing trace with hash -605120128, now seen corresponding path program 1 times [2025-03-17 14:23:55,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:55,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133852711] [2025-03-17 14:23:55,372 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:55,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:55,378 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-17 14:23:55,383 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-17 14:23:55,383 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:55,383 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:55,537 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-17 14:23:55,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:55,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133852711] [2025-03-17 14:23:55,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133852711] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:23:55,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781478856] [2025-03-17 14:23:55,538 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:55,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:23:55,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:23:55,540 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:23:55,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-17 14:23:55,595 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-17 14:23:55,615 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-17 14:23:55,616 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:55,616 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:55,619 INFO L256 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-17 14:23:55,621 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:23:55,725 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-17 14:23:55,725 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:23:55,765 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2025-03-17 14:23:55,813 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-17 14:23:55,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781478856] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:23:55,813 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:23:55,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2025-03-17 14:23:55,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476865054] [2025-03-17 14:23:55,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:23:55,814 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-17 14:23:55,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:55,814 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-17 14:23:55,814 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2025-03-17 14:23:56,284 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 82 [2025-03-17 14:23:56,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 107 transitions, 707 flow. Second operand has 19 states, 19 states have (on average 46.31578947368421) internal successors, (880), 19 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:56,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:56,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 82 [2025-03-17 14:23:56,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:23:56,725 INFO L124 PetriNetUnfolderBase]: 1494/3402 cut-off events. [2025-03-17 14:23:56,726 INFO L125 PetriNetUnfolderBase]: For 551/594 co-relation queries the response was YES. [2025-03-17 14:23:56,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6644 conditions, 3402 events. 1494/3402 cut-off events. For 551/594 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 26413 event pairs, 561 based on Foata normal form. 0/3104 useless extension candidates. Maximal degree in co-relation 6601. Up to 1136 conditions per place. [2025-03-17 14:23:56,736 INFO L140 encePairwiseOnDemand]: 67/82 looper letters, 105 selfloop transitions, 30 changer transitions 0/151 dead transitions. [2025-03-17 14:23:56,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 151 transitions, 1099 flow [2025-03-17 14:23:56,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-17 14:23:56,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-17 14:23:56,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 573 transitions. [2025-03-17 14:23:56,737 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6352549889135255 [2025-03-17 14:23:56,737 INFO L175 Difference]: Start difference. First operand has 113 places, 107 transitions, 707 flow. Second operand 11 states and 573 transitions. [2025-03-17 14:23:56,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 151 transitions, 1099 flow [2025-03-17 14:23:56,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 151 transitions, 1065 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-17 14:23:56,744 INFO L231 Difference]: Finished difference. Result has 124 places, 111 transitions, 788 flow [2025-03-17 14:23:56,744 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=673, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=788, PETRI_PLACES=124, PETRI_TRANSITIONS=111} [2025-03-17 14:23:56,744 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 46 predicate places. [2025-03-17 14:23:56,744 INFO L471 AbstractCegarLoop]: Abstraction has has 124 places, 111 transitions, 788 flow [2025-03-17 14:23:56,745 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 46.31578947368421) internal successors, (880), 19 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:56,745 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:56,746 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] [2025-03-17 14:23:56,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-03-17 14:23:56,949 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2025-03-17 14:23:56,949 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-17 14:23:56,949 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:56,949 INFO L85 PathProgramCache]: Analyzing trace with hash -605120129, now seen corresponding path program 1 times [2025-03-17 14:23:56,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:56,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60335455] [2025-03-17 14:23:56,950 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:56,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:56,955 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-17 14:23:56,959 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-17 14:23:56,959 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:56,959 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:56,987 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-17 14:23:56,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:56,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60335455] [2025-03-17 14:23:56,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60335455] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:23:56,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:23:56,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 14:23:56,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388555413] [2025-03-17 14:23:56,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:23:56,988 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:23:56,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:56,988 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:23:56,988 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:23:57,030 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 82 [2025-03-17 14:23:57,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 111 transitions, 788 flow. Second operand has 4 states, 4 states have (on average 46.5) internal successors, (186), 4 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:57,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:57,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 82 [2025-03-17 14:23:57,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:23:57,244 INFO L124 PetriNetUnfolderBase]: 1417/3193 cut-off events. [2025-03-17 14:23:57,244 INFO L125 PetriNetUnfolderBase]: For 896/953 co-relation queries the response was YES. [2025-03-17 14:23:57,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6760 conditions, 3193 events. 1417/3193 cut-off events. For 896/953 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 24242 event pairs, 889 based on Foata normal form. 198/3175 useless extension candidates. Maximal degree in co-relation 6713. Up to 2262 conditions per place. [2025-03-17 14:23:57,253 INFO L140 encePairwiseOnDemand]: 78/82 looper letters, 77 selfloop transitions, 16 changer transitions 0/109 dead transitions. [2025-03-17 14:23:57,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 109 transitions, 970 flow [2025-03-17 14:23:57,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:23:57,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:23:57,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 204 transitions. [2025-03-17 14:23:57,254 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2025-03-17 14:23:57,254 INFO L175 Difference]: Start difference. First operand has 124 places, 111 transitions, 788 flow. Second operand 4 states and 204 transitions. [2025-03-17 14:23:57,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 109 transitions, 970 flow [2025-03-17 14:23:57,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 109 transitions, 943 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-03-17 14:23:57,258 INFO L231 Difference]: Finished difference. Result has 120 places, 109 transitions, 789 flow [2025-03-17 14:23:57,258 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=757, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=789, PETRI_PLACES=120, PETRI_TRANSITIONS=109} [2025-03-17 14:23:57,259 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 42 predicate places. [2025-03-17 14:23:57,259 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 109 transitions, 789 flow [2025-03-17 14:23:57,259 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.5) internal successors, (186), 4 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:57,259 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:57,259 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:23:57,259 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2025-03-17 14:23:57,259 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-17 14:23:57,260 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:57,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1396685320, now seen corresponding path program 2 times [2025-03-17 14:23:57,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:57,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313006223] [2025-03-17 14:23:57,260 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:23:57,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:57,265 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-03-17 14:23:57,270 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-03-17 14:23:57,271 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:23:57,271 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:57,332 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 14:23:57,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:57,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313006223] [2025-03-17 14:23:57,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313006223] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:23:57,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153237256] [2025-03-17 14:23:57,333 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:23:57,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:23:57,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:23:57,335 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:23:57,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-17 14:23:57,392 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-03-17 14:23:57,414 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-03-17 14:23:57,414 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:23:57,414 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:57,415 INFO L256 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-17 14:23:57,416 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:23:57,462 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 14:23:57,463 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:23:57,510 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 14:23:57,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153237256] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:23:57,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:23:57,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2025-03-17 14:23:57,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000119838] [2025-03-17 14:23:57,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:23:57,511 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-17 14:23:57,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:57,511 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-17 14:23:57,511 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2025-03-17 14:23:57,642 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 82 [2025-03-17 14:23:57,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 109 transitions, 789 flow. Second operand has 14 states, 14 states have (on average 48.357142857142854) internal successors, (677), 14 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:57,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:57,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 82 [2025-03-17 14:23:57,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:23:58,044 INFO L124 PetriNetUnfolderBase]: 1415/3171 cut-off events. [2025-03-17 14:23:58,044 INFO L125 PetriNetUnfolderBase]: For 914/966 co-relation queries the response was YES. [2025-03-17 14:23:58,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6758 conditions, 3171 events. 1415/3171 cut-off events. For 914/966 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 23633 event pairs, 891 based on Foata normal form. 3/2970 useless extension candidates. Maximal degree in co-relation 6711. Up to 1260 conditions per place. [2025-03-17 14:23:58,055 INFO L140 encePairwiseOnDemand]: 72/82 looper letters, 87 selfloop transitions, 42 changer transitions 0/145 dead transitions. [2025-03-17 14:23:58,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 145 transitions, 1171 flow [2025-03-17 14:23:58,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-17 14:23:58,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-17 14:23:58,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 533 transitions. [2025-03-17 14:23:58,056 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.65 [2025-03-17 14:23:58,056 INFO L175 Difference]: Start difference. First operand has 120 places, 109 transitions, 789 flow. Second operand 10 states and 533 transitions. [2025-03-17 14:23:58,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 145 transitions, 1171 flow [2025-03-17 14:23:58,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 145 transitions, 1149 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:23:58,060 INFO L231 Difference]: Finished difference. Result has 130 places, 122 transitions, 960 flow [2025-03-17 14:23:58,061 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=767, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=960, PETRI_PLACES=130, PETRI_TRANSITIONS=122} [2025-03-17 14:23:58,061 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 52 predicate places. [2025-03-17 14:23:58,061 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 122 transitions, 960 flow [2025-03-17 14:23:58,061 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 48.357142857142854) internal successors, (677), 14 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:58,061 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:58,062 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:23:58,068 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-03-17 14:23:58,263 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2025-03-17 14:23:58,263 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-17 14:23:58,263 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:58,263 INFO L85 PathProgramCache]: Analyzing trace with hash 431263907, now seen corresponding path program 3 times [2025-03-17 14:23:58,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:58,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027370454] [2025-03-17 14:23:58,263 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:23:58,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:58,272 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 20 statements into 5 equivalence classes. [2025-03-17 14:23:58,277 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 9 of 20 statements. [2025-03-17 14:23:58,277 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 14:23:58,277 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:58,359 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-17 14:23:58,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:58,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027370454] [2025-03-17 14:23:58,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027370454] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:23:58,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947517184] [2025-03-17 14:23:58,360 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:23:58,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:23:58,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:23:58,362 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:23:58,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-17 14:23:58,418 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 20 statements into 5 equivalence classes. [2025-03-17 14:23:58,434 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 9 of 20 statements. [2025-03-17 14:23:58,435 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 14:23:58,435 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:58,436 INFO L256 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-17 14:23:58,437 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:23:58,453 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2025-03-17 14:23:58,534 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-17 14:23:58,534 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:23:58,644 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-17 14:23:58,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947517184] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:23:58,644 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:23:58,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2025-03-17 14:23:58,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677862190] [2025-03-17 14:23:58,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:23:58,644 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-17 14:23:58,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:58,645 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-17 14:23:58,645 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2025-03-17 14:23:58,950 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 82 [2025-03-17 14:23:58,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 122 transitions, 960 flow. Second operand has 13 states, 13 states have (on average 46.76923076923077) internal successors, (608), 13 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:58,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:58,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 82 [2025-03-17 14:23:58,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:23:59,269 INFO L124 PetriNetUnfolderBase]: 1404/3158 cut-off events. [2025-03-17 14:23:59,269 INFO L125 PetriNetUnfolderBase]: For 906/967 co-relation queries the response was YES. [2025-03-17 14:23:59,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6800 conditions, 3158 events. 1404/3158 cut-off events. For 906/967 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 23529 event pairs, 875 based on Foata normal form. 2/2946 useless extension candidates. Maximal degree in co-relation 6755. Up to 2302 conditions per place. [2025-03-17 14:23:59,281 INFO L140 encePairwiseOnDemand]: 76/82 looper letters, 63 selfloop transitions, 43 changer transitions 0/121 dead transitions. [2025-03-17 14:23:59,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 121 transitions, 1162 flow [2025-03-17 14:23:59,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-17 14:23:59,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-17 14:23:59,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 345 transitions. [2025-03-17 14:23:59,282 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6010452961672473 [2025-03-17 14:23:59,283 INFO L175 Difference]: Start difference. First operand has 130 places, 122 transitions, 960 flow. Second operand 7 states and 345 transitions. [2025-03-17 14:23:59,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 121 transitions, 1162 flow [2025-03-17 14:23:59,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 121 transitions, 1084 flow, removed 12 selfloop flow, removed 10 redundant places. [2025-03-17 14:23:59,288 INFO L231 Difference]: Finished difference. Result has 125 places, 121 transitions, 958 flow [2025-03-17 14:23:59,288 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=872, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=958, PETRI_PLACES=125, PETRI_TRANSITIONS=121} [2025-03-17 14:23:59,288 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 47 predicate places. [2025-03-17 14:23:59,288 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 121 transitions, 958 flow [2025-03-17 14:23:59,288 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 46.76923076923077) internal successors, (608), 13 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:59,288 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:59,289 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:23:59,294 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-03-17 14:23:59,489 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:23:59,489 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-17 14:23:59,489 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:59,490 INFO L85 PathProgramCache]: Analyzing trace with hash 720573041, now seen corresponding path program 2 times [2025-03-17 14:23:59,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:59,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073888518] [2025-03-17 14:23:59,490 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:23:59,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:59,496 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-03-17 14:23:59,502 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-17 14:23:59,502 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:23:59,503 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:59,565 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-17 14:23:59,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:59,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073888518] [2025-03-17 14:23:59,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073888518] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:23:59,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575078148] [2025-03-17 14:23:59,566 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:23:59,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:23:59,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:23:59,568 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:23:59,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-17 14:23:59,626 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-03-17 14:23:59,650 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-17 14:23:59,650 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:23:59,650 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:59,651 INFO L256 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-17 14:23:59,652 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:23:59,703 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-17 14:23:59,703 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:23:59,747 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-17 14:23:59,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575078148] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:23:59,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:23:59,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2025-03-17 14:23:59,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484759648] [2025-03-17 14:23:59,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:23:59,748 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-17 14:23:59,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:59,749 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-17 14:23:59,749 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2025-03-17 14:23:59,859 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 82 [2025-03-17 14:23:59,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 121 transitions, 958 flow. Second operand has 14 states, 14 states have (on average 48.42857142857143) internal successors, (678), 14 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:59,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:59,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 82 [2025-03-17 14:23:59,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:24:00,208 INFO L124 PetriNetUnfolderBase]: 1394/3128 cut-off events. [2025-03-17 14:24:00,208 INFO L125 PetriNetUnfolderBase]: For 843/910 co-relation queries the response was YES. [2025-03-17 14:24:00,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6735 conditions, 3128 events. 1394/3128 cut-off events. For 843/910 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 23133 event pairs, 869 based on Foata normal form. 4/2924 useless extension candidates. Maximal degree in co-relation 4515. Up to 1624 conditions per place. [2025-03-17 14:24:00,221 INFO L140 encePairwiseOnDemand]: 72/82 looper letters, 81 selfloop transitions, 52 changer transitions 0/148 dead transitions. [2025-03-17 14:24:00,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 148 transitions, 1293 flow [2025-03-17 14:24:00,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-17 14:24:00,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-17 14:24:00,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 530 transitions. [2025-03-17 14:24:00,223 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6463414634146342 [2025-03-17 14:24:00,223 INFO L175 Difference]: Start difference. First operand has 125 places, 121 transitions, 958 flow. Second operand 10 states and 530 transitions. [2025-03-17 14:24:00,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 148 transitions, 1293 flow [2025-03-17 14:24:00,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 148 transitions, 1211 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-17 14:24:00,228 INFO L231 Difference]: Finished difference. Result has 131 places, 125 transitions, 1003 flow [2025-03-17 14:24:00,228 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=832, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1003, PETRI_PLACES=131, PETRI_TRANSITIONS=125} [2025-03-17 14:24:00,228 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 53 predicate places. [2025-03-17 14:24:00,229 INFO L471 AbstractCegarLoop]: Abstraction has has 131 places, 125 transitions, 1003 flow [2025-03-17 14:24:00,229 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 48.42857142857143) internal successors, (678), 14 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:24:00,229 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:24:00,229 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:24:00,235 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-03-17 14:24:00,429 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2025-03-17 14:24:00,430 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-17 14:24:00,430 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:24:00,430 INFO L85 PathProgramCache]: Analyzing trace with hash -281904614, now seen corresponding path program 3 times [2025-03-17 14:24:00,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:24:00,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623878391] [2025-03-17 14:24:00,430 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:24:00,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:24:00,437 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 22 statements into 4 equivalence classes. [2025-03-17 14:24:00,447 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 13 of 22 statements. [2025-03-17 14:24:00,447 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 14:24:00,447 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:24:00,578 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-17 14:24:00,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:24:00,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623878391] [2025-03-17 14:24:00,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623878391] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:24:00,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649719060] [2025-03-17 14:24:00,578 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:24:00,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:24:00,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:24:00,580 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:24:00,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-17 14:24:00,640 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 22 statements into 4 equivalence classes. [2025-03-17 14:24:00,660 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 13 of 22 statements. [2025-03-17 14:24:00,661 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 14:24:00,661 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:24:00,662 INFO L256 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-17 14:24:00,663 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:24:00,673 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-17 14:24:00,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-17 14:24:00,731 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 12 [2025-03-17 14:24:00,736 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-17 14:24:00,736 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-03-17 14:24:00,784 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-17 14:24:00,785 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 14:24:00,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649719060] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:24:00,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 14:24:00,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2025-03-17 14:24:00,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154943725] [2025-03-17 14:24:00,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:24:00,785 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 14:24:00,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:24:00,785 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 14:24:00,785 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2025-03-17 14:24:00,905 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 82 [2025-03-17 14:24:00,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 125 transitions, 1003 flow. Second operand has 6 states, 6 states have (on average 45.0) internal successors, (270), 6 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:24:00,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:24:00,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 82 [2025-03-17 14:24:00,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:24:01,142 INFO L124 PetriNetUnfolderBase]: 1364/3027 cut-off events. [2025-03-17 14:24:01,142 INFO L125 PetriNetUnfolderBase]: For 916/940 co-relation queries the response was YES. [2025-03-17 14:24:01,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6486 conditions, 3027 events. 1364/3027 cut-off events. For 916/940 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 21644 event pairs, 859 based on Foata normal form. 60/2893 useless extension candidates. Maximal degree in co-relation 4382. Up to 2208 conditions per place. [2025-03-17 14:24:01,153 INFO L140 encePairwiseOnDemand]: 77/82 looper letters, 97 selfloop transitions, 13 changer transitions 0/123 dead transitions. [2025-03-17 14:24:01,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 123 transitions, 1211 flow [2025-03-17 14:24:01,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:24:01,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:24:01,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 246 transitions. [2025-03-17 14:24:01,154 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6 [2025-03-17 14:24:01,154 INFO L175 Difference]: Start difference. First operand has 131 places, 125 transitions, 1003 flow. Second operand 5 states and 246 transitions. [2025-03-17 14:24:01,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 123 transitions, 1211 flow [2025-03-17 14:24:01,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 123 transitions, 1159 flow, removed 6 selfloop flow, removed 8 redundant places. [2025-03-17 14:24:01,158 INFO L231 Difference]: Finished difference. Result has 125 places, 123 transitions, 965 flow [2025-03-17 14:24:01,158 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=939, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=965, PETRI_PLACES=125, PETRI_TRANSITIONS=123} [2025-03-17 14:24:01,158 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 47 predicate places. [2025-03-17 14:24:01,158 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 123 transitions, 965 flow [2025-03-17 14:24:01,159 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 45.0) internal successors, (270), 6 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:24:01,159 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:24:01,159 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:24:01,165 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-03-17 14:24:01,359 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2025-03-17 14:24:01,359 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-17 14:24:01,360 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:24:01,360 INFO L85 PathProgramCache]: Analyzing trace with hash -488354538, now seen corresponding path program 3 times [2025-03-17 14:24:01,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:24:01,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820716364] [2025-03-17 14:24:01,360 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:24:01,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:24:01,366 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 24 statements into 5 equivalence classes. [2025-03-17 14:24:01,394 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 14:24:01,394 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-03-17 14:24:01,394 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:24:01,554 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 14:24:01,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:24:01,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820716364] [2025-03-17 14:24:01,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820716364] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:24:01,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683768563] [2025-03-17 14:24:01,554 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:24:01,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:24:01,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:24:01,556 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:24:01,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-17 14:24:01,620 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 24 statements into 5 equivalence classes. [2025-03-17 14:24:01,658 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 14:24:01,658 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-03-17 14:24:01,658 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:24:01,659 INFO L256 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-03-17 14:24:01,660 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:24:01,811 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-17 14:24:01,811 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:24:01,852 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2025-03-17 14:24:01,983 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-17 14:24:01,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683768563] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:24:01,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:24:01,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2025-03-17 14:24:01,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047171873] [2025-03-17 14:24:01,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:24:01,984 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-17 14:24:01,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:24:01,984 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-17 14:24:01,985 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2025-03-17 14:24:02,768 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 82 [2025-03-17 14:24:02,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 123 transitions, 965 flow. Second operand has 28 states, 28 states have (on average 46.07142857142857) internal successors, (1290), 28 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:24:02,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:24:02,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 82 [2025-03-17 14:24:02,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:24:03,484 INFO L124 PetriNetUnfolderBase]: 1429/3092 cut-off events. [2025-03-17 14:24:03,484 INFO L125 PetriNetUnfolderBase]: For 740/740 co-relation queries the response was YES. [2025-03-17 14:24:03,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6624 conditions, 3092 events. 1429/3092 cut-off events. For 740/740 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 21813 event pairs, 542 based on Foata normal form. 42/2968 useless extension candidates. Maximal degree in co-relation 4296. Up to 727 conditions per place. [2025-03-17 14:24:03,495 INFO L140 encePairwiseOnDemand]: 66/82 looper letters, 147 selfloop transitions, 51 changer transitions 0/209 dead transitions. [2025-03-17 14:24:03,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 209 transitions, 1655 flow [2025-03-17 14:24:03,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-17 14:24:03,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-03-17 14:24:03,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 972 transitions. [2025-03-17 14:24:03,497 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6238767650834403 [2025-03-17 14:24:03,497 INFO L175 Difference]: Start difference. First operand has 125 places, 123 transitions, 965 flow. Second operand 19 states and 972 transitions. [2025-03-17 14:24:03,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 209 transitions, 1655 flow [2025-03-17 14:24:03,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 209 transitions, 1635 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-17 14:24:03,502 INFO L231 Difference]: Finished difference. Result has 145 places, 132 transitions, 1166 flow [2025-03-17 14:24:03,502 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=945, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1166, PETRI_PLACES=145, PETRI_TRANSITIONS=132} [2025-03-17 14:24:03,503 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 67 predicate places. [2025-03-17 14:24:03,503 INFO L471 AbstractCegarLoop]: Abstraction has has 145 places, 132 transitions, 1166 flow [2025-03-17 14:24:03,504 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 46.07142857142857) internal successors, (1290), 28 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:24:03,504 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:24:03,504 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:24:03,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2025-03-17 14:24:03,704 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2025-03-17 14:24:03,705 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-17 14:24:03,705 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:24:03,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1204755065, now seen corresponding path program 4 times [2025-03-17 14:24:03,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:24:03,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533490889] [2025-03-17 14:24:03,705 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 14:24:03,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:24:03,718 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 26 statements into 2 equivalence classes. [2025-03-17 14:24:03,727 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-03-17 14:24:03,727 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 14:24:03,727 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:24:03,838 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 12 proven. 28 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 14:24:03,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:24:03,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533490889] [2025-03-17 14:24:03,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533490889] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:24:03,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71606140] [2025-03-17 14:24:03,838 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 14:24:03,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:24:03,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:24:03,841 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:24:03,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-17 14:24:03,909 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 26 statements into 2 equivalence classes. [2025-03-17 14:24:03,936 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-03-17 14:24:03,936 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 14:24:03,936 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:24:03,938 INFO L256 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-17 14:24:03,939 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:24:04,013 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 12 proven. 28 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 14:24:04,014 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:24:04,077 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 17 proven. 23 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 14:24:04,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71606140] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:24:04,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:24:04,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2025-03-17 14:24:04,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997695158] [2025-03-17 14:24:04,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:24:04,078 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-17 14:24:04,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:24:04,078 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-17 14:24:04,078 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2025-03-17 14:24:04,258 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 82 [2025-03-17 14:24:04,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 132 transitions, 1166 flow. Second operand has 18 states, 18 states have (on average 48.27777777777778) internal successors, (869), 18 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:24:04,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:24:04,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 82 [2025-03-17 14:24:04,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:24:04,725 INFO L124 PetriNetUnfolderBase]: 1383/3010 cut-off events. [2025-03-17 14:24:04,725 INFO L125 PetriNetUnfolderBase]: For 1129/1149 co-relation queries the response was YES. [2025-03-17 14:24:04,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6848 conditions, 3010 events. 1383/3010 cut-off events. For 1129/1149 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 20878 event pairs, 877 based on Foata normal form. 2/2826 useless extension candidates. Maximal degree in co-relation 4574. Up to 1474 conditions per place. [2025-03-17 14:24:04,739 INFO L140 encePairwiseOnDemand]: 72/82 looper letters, 85 selfloop transitions, 66 changer transitions 0/164 dead transitions. [2025-03-17 14:24:04,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 164 transitions, 1609 flow [2025-03-17 14:24:04,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-17 14:24:04,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-17 14:24:04,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 627 transitions. [2025-03-17 14:24:04,740 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6371951219512195 [2025-03-17 14:24:04,740 INFO L175 Difference]: Start difference. First operand has 145 places, 132 transitions, 1166 flow. Second operand 12 states and 627 transitions. [2025-03-17 14:24:04,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 164 transitions, 1609 flow [2025-03-17 14:24:04,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 164 transitions, 1521 flow, removed 7 selfloop flow, removed 12 redundant places. [2025-03-17 14:24:04,745 INFO L231 Difference]: Finished difference. Result has 146 places, 141 transitions, 1313 flow [2025-03-17 14:24:04,745 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=1078, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1313, PETRI_PLACES=146, PETRI_TRANSITIONS=141} [2025-03-17 14:24:04,746 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 68 predicate places. [2025-03-17 14:24:04,746 INFO L471 AbstractCegarLoop]: Abstraction has has 146 places, 141 transitions, 1313 flow [2025-03-17 14:24:04,746 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 48.27777777777778) internal successors, (869), 18 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:24:04,746 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:24:04,746 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:24:04,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2025-03-17 14:24:04,946 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:24:04,947 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-17 14:24:04,947 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:24:04,947 INFO L85 PathProgramCache]: Analyzing trace with hash 402240172, now seen corresponding path program 5 times [2025-03-17 14:24:04,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:24:04,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016261255] [2025-03-17 14:24:04,947 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 14:24:04,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:24:04,955 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 6 equivalence classes. [2025-03-17 14:24:04,984 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 28 of 28 statements. [2025-03-17 14:24:04,984 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-03-17 14:24:04,984 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:24:05,181 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 18 proven. 41 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 14:24:05,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:24:05,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016261255] [2025-03-17 14:24:05,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016261255] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:24:05,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082075482] [2025-03-17 14:24:05,182 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 14:24:05,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:24:05,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:24:05,184 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:24:05,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-17 14:24:05,253 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 6 equivalence classes. [2025-03-17 14:24:05,297 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 28 of 28 statements. [2025-03-17 14:24:05,298 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-03-17 14:24:05,298 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:24:05,299 INFO L256 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-03-17 14:24:05,300 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:24:05,512 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 43 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-03-17 14:24:05,512 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:24:05,567 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2025-03-17 14:24:05,780 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-03-17 14:24:05,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082075482] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:24:05,781 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:24:05,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2025-03-17 14:24:05,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465304814] [2025-03-17 14:24:05,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:24:05,781 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2025-03-17 14:24:05,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:24:05,781 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2025-03-17 14:24:05,782 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1013, Unknown=0, NotChecked=0, Total=1190 [2025-03-17 14:24:06,917 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 82 [2025-03-17 14:24:06,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 141 transitions, 1313 flow. Second operand has 35 states, 35 states have (on average 46.05714285714286) internal successors, (1612), 35 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:24:06,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:24:06,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 82 [2025-03-17 14:24:06,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:24:08,289 INFO L124 PetriNetUnfolderBase]: 2337/4999 cut-off events. [2025-03-17 14:24:08,289 INFO L125 PetriNetUnfolderBase]: For 2068/2068 co-relation queries the response was YES. [2025-03-17 14:24:08,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11268 conditions, 4999 events. 2337/4999 cut-off events. For 2068/2068 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 38111 event pairs, 1305 based on Foata normal form. 42/4749 useless extension candidates. Maximal degree in co-relation 8790. Up to 1442 conditions per place. [2025-03-17 14:24:08,307 INFO L140 encePairwiseOnDemand]: 66/82 looper letters, 189 selfloop transitions, 68 changer transitions 0/268 dead transitions. [2025-03-17 14:24:08,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 268 transitions, 2564 flow [2025-03-17 14:24:08,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-03-17 14:24:08,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2025-03-17 14:24:08,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1351 transitions. [2025-03-17 14:24:08,309 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6102077687443541 [2025-03-17 14:24:08,309 INFO L175 Difference]: Start difference. First operand has 146 places, 141 transitions, 1313 flow. Second operand 27 states and 1351 transitions. [2025-03-17 14:24:08,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 268 transitions, 2564 flow [2025-03-17 14:24:08,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 268 transitions, 2497 flow, removed 12 selfloop flow, removed 7 redundant places. [2025-03-17 14:24:08,318 INFO L231 Difference]: Finished difference. Result has 175 places, 166 transitions, 1780 flow [2025-03-17 14:24:08,318 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=1267, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1780, PETRI_PLACES=175, PETRI_TRANSITIONS=166} [2025-03-17 14:24:08,318 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 97 predicate places. [2025-03-17 14:24:08,319 INFO L471 AbstractCegarLoop]: Abstraction has has 175 places, 166 transitions, 1780 flow [2025-03-17 14:24:08,319 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 46.05714285714286) internal successors, (1612), 35 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:24:08,319 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:24:08,319 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:24:08,326 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-03-17 14:24:08,519 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:24:08,520 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-17 14:24:08,520 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:24:08,520 INFO L85 PathProgramCache]: Analyzing trace with hash -881677667, now seen corresponding path program 6 times [2025-03-17 14:24:08,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:24:08,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493542646] [2025-03-17 14:24:08,520 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 14:24:08,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:24:08,529 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 30 statements into 6 equivalence classes. [2025-03-17 14:24:08,544 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) and asserted 20 of 30 statements. [2025-03-17 14:24:08,545 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2025-03-17 14:24:08,545 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:24:08,658 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 31 proven. 18 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-03-17 14:24:08,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:24:08,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493542646] [2025-03-17 14:24:08,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493542646] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:24:08,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342340709] [2025-03-17 14:24:08,659 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 14:24:08,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:24:08,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:24:08,661 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:24:08,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-03-17 14:24:08,731 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 30 statements into 6 equivalence classes. [2025-03-17 14:24:08,758 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) and asserted 20 of 30 statements. [2025-03-17 14:24:08,758 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2025-03-17 14:24:08,758 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:24:08,760 INFO L256 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-17 14:24:08,761 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:24:08,841 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2025-03-17 14:24:08,841 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 14:24:08,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342340709] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:24:08,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 14:24:08,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 11 [2025-03-17 14:24:08,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524794595] [2025-03-17 14:24:08,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:24:08,842 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 14:24:08,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:24:08,842 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 14:24:08,842 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2025-03-17 14:24:08,899 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 82 [2025-03-17 14:24:08,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 166 transitions, 1780 flow. Second operand has 6 states, 6 states have (on average 47.166666666666664) internal successors, (283), 6 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:24:08,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:24:08,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 82 [2025-03-17 14:24:08,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:24:09,239 INFO L124 PetriNetUnfolderBase]: 2261/4873 cut-off events. [2025-03-17 14:24:09,239 INFO L125 PetriNetUnfolderBase]: For 2317/2317 co-relation queries the response was YES. [2025-03-17 14:24:09,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11009 conditions, 4873 events. 2261/4873 cut-off events. For 2317/2317 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 37153 event pairs, 1448 based on Foata normal form. 42/4627 useless extension candidates. Maximal degree in co-relation 9760. Up to 3615 conditions per place. [2025-03-17 14:24:09,298 INFO L140 encePairwiseOnDemand]: 77/82 looper letters, 133 selfloop transitions, 20 changer transitions 0/164 dead transitions. [2025-03-17 14:24:09,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 164 transitions, 2066 flow [2025-03-17 14:24:09,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:24:09,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:24:09,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 256 transitions. [2025-03-17 14:24:09,299 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.624390243902439 [2025-03-17 14:24:09,299 INFO L175 Difference]: Start difference. First operand has 175 places, 166 transitions, 1780 flow. Second operand 5 states and 256 transitions. [2025-03-17 14:24:09,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 164 transitions, 2066 flow [2025-03-17 14:24:09,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 164 transitions, 1984 flow, removed 4 selfloop flow, removed 14 redundant places. [2025-03-17 14:24:09,307 INFO L231 Difference]: Finished difference. Result has 163 places, 164 transitions, 1718 flow [2025-03-17 14:24:09,307 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=1678, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1718, PETRI_PLACES=163, PETRI_TRANSITIONS=164} [2025-03-17 14:24:09,307 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 85 predicate places. [2025-03-17 14:24:09,307 INFO L471 AbstractCegarLoop]: Abstraction has has 163 places, 164 transitions, 1718 flow [2025-03-17 14:24:09,307 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 47.166666666666664) internal successors, (283), 6 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:24:09,308 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:24:09,308 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] [2025-03-17 14:24:09,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2025-03-17 14:24:09,508 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2025-03-17 14:24:09,508 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-17 14:24:09,509 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:24:09,509 INFO L85 PathProgramCache]: Analyzing trace with hash -89032030, now seen corresponding path program 1 times [2025-03-17 14:24:09,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:24:09,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145344629] [2025-03-17 14:24:09,509 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:24:09,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:24:09,515 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-03-17 14:24:09,518 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-03-17 14:24:09,519 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:24:09,519 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:24:09,538 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-03-17 14:24:09,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:24:09,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145344629] [2025-03-17 14:24:09,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145344629] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:24:09,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:24:09,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 14:24:09,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83415441] [2025-03-17 14:24:09,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:24:09,539 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 14:24:09,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:24:09,539 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 14:24:09,539 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 14:24:09,541 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 82 [2025-03-17 14:24:09,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 164 transitions, 1718 flow. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:24:09,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:24:09,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 82 [2025-03-17 14:24:09,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:24:10,034 INFO L124 PetriNetUnfolderBase]: 3241/6495 cut-off events. [2025-03-17 14:24:10,035 INFO L125 PetriNetUnfolderBase]: For 1669/1669 co-relation queries the response was YES. [2025-03-17 14:24:10,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14733 conditions, 6495 events. 3241/6495 cut-off events. For 1669/1669 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 48828 event pairs, 1553 based on Foata normal form. 0/6009 useless extension candidates. Maximal degree in co-relation 13125. Up to 3710 conditions per place. [2025-03-17 14:24:10,061 INFO L140 encePairwiseOnDemand]: 78/82 looper letters, 169 selfloop transitions, 3 changer transitions 0/180 dead transitions. [2025-03-17 14:24:10,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 180 transitions, 2126 flow [2025-03-17 14:24:10,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 14:24:10,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 14:24:10,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 179 transitions. [2025-03-17 14:24:10,062 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7276422764227642 [2025-03-17 14:24:10,062 INFO L175 Difference]: Start difference. First operand has 163 places, 164 transitions, 1718 flow. Second operand 3 states and 179 transitions. [2025-03-17 14:24:10,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 180 transitions, 2126 flow [2025-03-17 14:24:10,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 180 transitions, 2096 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-17 14:24:10,070 INFO L231 Difference]: Finished difference. Result has 164 places, 166 transitions, 1710 flow [2025-03-17 14:24:10,071 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=1688, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1710, PETRI_PLACES=164, PETRI_TRANSITIONS=166} [2025-03-17 14:24:10,071 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 86 predicate places. [2025-03-17 14:24:10,071 INFO L471 AbstractCegarLoop]: Abstraction has has 164 places, 166 transitions, 1710 flow [2025-03-17 14:24:10,071 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:24:10,071 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:24:10,071 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] [2025-03-17 14:24:10,071 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2025-03-17 14:24:10,072 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-17 14:24:10,072 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:24:10,072 INFO L85 PathProgramCache]: Analyzing trace with hash -595008757, now seen corresponding path program 1 times [2025-03-17 14:24:10,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:24:10,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049255359] [2025-03-17 14:24:10,072 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:24:10,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:24:10,081 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-03-17 14:24:10,085 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-03-17 14:24:10,087 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:24:10,088 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:24:10,105 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-03-17 14:24:10,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:24:10,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049255359] [2025-03-17 14:24:10,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049255359] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:24:10,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:24:10,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 14:24:10,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972007578] [2025-03-17 14:24:10,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:24:10,106 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 14:24:10,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:24:10,106 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 14:24:10,106 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 14:24:10,108 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 82 [2025-03-17 14:24:10,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 166 transitions, 1710 flow. Second operand has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:24:10,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:24:10,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 82 [2025-03-17 14:24:10,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:24:10,677 INFO L124 PetriNetUnfolderBase]: 3599/6827 cut-off events. [2025-03-17 14:24:10,677 INFO L125 PetriNetUnfolderBase]: For 2829/2985 co-relation queries the response was YES. [2025-03-17 14:24:10,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17226 conditions, 6827 events. 3599/6827 cut-off events. For 2829/2985 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 49960 event pairs, 1930 based on Foata normal form. 156/6553 useless extension candidates. Maximal degree in co-relation 15364. Up to 4436 conditions per place. [2025-03-17 14:24:10,704 INFO L140 encePairwiseOnDemand]: 78/82 looper letters, 167 selfloop transitions, 3 changer transitions 0/179 dead transitions. [2025-03-17 14:24:10,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 179 transitions, 2094 flow [2025-03-17 14:24:10,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 14:24:10,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 14:24:10,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 178 transitions. [2025-03-17 14:24:10,705 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7235772357723578 [2025-03-17 14:24:10,705 INFO L175 Difference]: Start difference. First operand has 164 places, 166 transitions, 1710 flow. Second operand 3 states and 178 transitions. [2025-03-17 14:24:10,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 179 transitions, 2094 flow [2025-03-17 14:24:10,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 179 transitions, 2086 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:24:10,724 INFO L231 Difference]: Finished difference. Result has 166 places, 168 transitions, 1726 flow [2025-03-17 14:24:10,724 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=1704, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1726, PETRI_PLACES=166, PETRI_TRANSITIONS=168} [2025-03-17 14:24:10,725 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 88 predicate places. [2025-03-17 14:24:10,725 INFO L471 AbstractCegarLoop]: Abstraction has has 166 places, 168 transitions, 1726 flow [2025-03-17 14:24:10,725 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:24:10,725 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:24:10,725 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] [2025-03-17 14:24:10,725 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2025-03-17 14:24:10,725 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-17 14:24:10,725 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:24:10,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1853865736, now seen corresponding path program 1 times [2025-03-17 14:24:10,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:24:10,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932871805] [2025-03-17 14:24:10,726 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:24:10,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:24:10,732 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-17 14:24:10,740 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-17 14:24:10,740 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:24:10,740 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:24:11,208 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-03-17 14:24:11,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:24:11,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932871805] [2025-03-17 14:24:11,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932871805] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:24:11,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:24:11,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2025-03-17 14:24:11,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224733064] [2025-03-17 14:24:11,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:24:11,209 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 14:24:11,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:24:11,209 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 14:24:11,209 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2025-03-17 14:24:11,355 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 82 [2025-03-17 14:24:11,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 168 transitions, 1726 flow. Second operand has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:24:11,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:24:11,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 82 [2025-03-17 14:24:11,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:24:13,162 INFO L124 PetriNetUnfolderBase]: 8112/16714 cut-off events. [2025-03-17 14:24:13,162 INFO L125 PetriNetUnfolderBase]: For 8367/8925 co-relation queries the response was YES. [2025-03-17 14:24:13,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43549 conditions, 16714 events. 8112/16714 cut-off events. For 8367/8925 co-relation queries the response was YES. Maximal size of possible extension queue 859. Compared 157659 event pairs, 692 based on Foata normal form. 568/17066 useless extension candidates. Maximal degree in co-relation 38936. Up to 3901 conditions per place. [2025-03-17 14:24:13,276 INFO L140 encePairwiseOnDemand]: 73/82 looper letters, 262 selfloop transitions, 6 changer transitions 7/288 dead transitions. [2025-03-17 14:24:13,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 288 transitions, 2844 flow [2025-03-17 14:24:13,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-17 14:24:13,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-17 14:24:13,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 572 transitions. [2025-03-17 14:24:13,277 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.697560975609756 [2025-03-17 14:24:13,277 INFO L175 Difference]: Start difference. First operand has 166 places, 168 transitions, 1726 flow. Second operand 10 states and 572 transitions. [2025-03-17 14:24:13,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 288 transitions, 2844 flow [2025-03-17 14:24:13,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 288 transitions, 2826 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:24:13,482 INFO L231 Difference]: Finished difference. Result has 181 places, 173 transitions, 1773 flow [2025-03-17 14:24:13,482 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=1720, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1773, PETRI_PLACES=181, PETRI_TRANSITIONS=173} [2025-03-17 14:24:13,482 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 103 predicate places. [2025-03-17 14:24:13,482 INFO L471 AbstractCegarLoop]: Abstraction has has 181 places, 173 transitions, 1773 flow [2025-03-17 14:24:13,483 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:24:13,483 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:24:13,483 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] [2025-03-17 14:24:13,483 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2025-03-17 14:24:13,483 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-17 14:24:13,483 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:24:13,483 INFO L85 PathProgramCache]: Analyzing trace with hash -428423532, now seen corresponding path program 2 times [2025-03-17 14:24:13,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:24:13,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859964322] [2025-03-17 14:24:13,484 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:24:13,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:24:13,490 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 37 statements into 2 equivalence classes. [2025-03-17 14:24:13,492 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 25 of 37 statements. [2025-03-17 14:24:13,492 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 14:24:13,492 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:24:13,691 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-03-17 14:24:13,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:24:13,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859964322] [2025-03-17 14:24:13,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859964322] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:24:13,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:24:13,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2025-03-17 14:24:13,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212367239] [2025-03-17 14:24:13,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:24:13,692 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 14:24:13,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:24:13,692 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 14:24:13,692 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2025-03-17 14:24:13,862 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 82 [2025-03-17 14:24:13,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 173 transitions, 1773 flow. Second operand has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:24:13,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:24:13,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 82 [2025-03-17 14:24:13,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:24:16,360 INFO L124 PetriNetUnfolderBase]: 9779/20137 cut-off events. [2025-03-17 14:24:16,360 INFO L125 PetriNetUnfolderBase]: For 15300/16150 co-relation queries the response was YES. [2025-03-17 14:24:16,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56509 conditions, 20137 events. 9779/20137 cut-off events. For 15300/16150 co-relation queries the response was YES. Maximal size of possible extension queue 1084. Compared 195929 event pairs, 1322 based on Foata normal form. 840/20777 useless extension candidates. Maximal degree in co-relation 56193. Up to 10933 conditions per place. [2025-03-17 14:24:16,600 INFO L140 encePairwiseOnDemand]: 73/82 looper letters, 235 selfloop transitions, 8 changer transitions 7/263 dead transitions. [2025-03-17 14:24:16,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 263 transitions, 2726 flow [2025-03-17 14:24:16,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-17 14:24:16,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-17 14:24:16,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 556 transitions. [2025-03-17 14:24:16,602 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6780487804878049 [2025-03-17 14:24:16,602 INFO L175 Difference]: Start difference. First operand has 181 places, 173 transitions, 1773 flow. Second operand 10 states and 556 transitions. [2025-03-17 14:24:16,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 263 transitions, 2726 flow [2025-03-17 14:24:17,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 263 transitions, 2703 flow, removed 10 selfloop flow, removed 3 redundant places. [2025-03-17 14:24:17,060 INFO L231 Difference]: Finished difference. Result has 192 places, 177 transitions, 1826 flow [2025-03-17 14:24:17,060 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=1766, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1826, PETRI_PLACES=192, PETRI_TRANSITIONS=177} [2025-03-17 14:24:17,061 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 114 predicate places. [2025-03-17 14:24:17,061 INFO L471 AbstractCegarLoop]: Abstraction has has 192 places, 177 transitions, 1826 flow [2025-03-17 14:24:17,061 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:24:17,061 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:24:17,061 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] [2025-03-17 14:24:17,061 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2025-03-17 14:24:17,061 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-17 14:24:17,061 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:24:17,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1601437420, now seen corresponding path program 3 times [2025-03-17 14:24:17,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:24:17,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405571932] [2025-03-17 14:24:17,062 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:24:17,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:24:17,068 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 37 statements into 4 equivalence classes. [2025-03-17 14:24:17,071 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 25 of 37 statements. [2025-03-17 14:24:17,071 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-03-17 14:24:17,071 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:24:17,478 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-03-17 14:24:17,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:24:17,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405571932] [2025-03-17 14:24:17,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405571932] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:24:17,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:24:17,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2025-03-17 14:24:17,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424374990] [2025-03-17 14:24:17,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:24:17,479 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 14:24:17,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:24:17,479 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 14:24:17,479 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2025-03-17 14:24:17,836 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 82 [2025-03-17 14:24:17,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 177 transitions, 1826 flow. Second operand has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:24:17,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:24:17,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 82 [2025-03-17 14:24:17,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:24:20,135 INFO L124 PetriNetUnfolderBase]: 10496/22134 cut-off events. [2025-03-17 14:24:20,135 INFO L125 PetriNetUnfolderBase]: For 28150/28866 co-relation queries the response was YES. [2025-03-17 14:24:20,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65858 conditions, 22134 events. 10496/22134 cut-off events. For 28150/28866 co-relation queries the response was YES. Maximal size of possible extension queue 1134. Compared 224428 event pairs, 1210 based on Foata normal form. 726/22520 useless extension candidates. Maximal degree in co-relation 65337. Up to 11121 conditions per place. [2025-03-17 14:24:20,531 INFO L140 encePairwiseOnDemand]: 73/82 looper letters, 218 selfloop transitions, 13 changer transitions 7/251 dead transitions. [2025-03-17 14:24:20,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 251 transitions, 2661 flow [2025-03-17 14:24:20,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-17 14:24:20,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-17 14:24:20,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 557 transitions. [2025-03-17 14:24:20,532 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6792682926829269 [2025-03-17 14:24:20,532 INFO L175 Difference]: Start difference. First operand has 192 places, 177 transitions, 1826 flow. Second operand 10 states and 557 transitions. [2025-03-17 14:24:20,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 251 transitions, 2661 flow [2025-03-17 14:24:20,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 251 transitions, 2616 flow, removed 13 selfloop flow, removed 4 redundant places. [2025-03-17 14:24:21,001 INFO L231 Difference]: Finished difference. Result has 200 places, 179 transitions, 1863 flow [2025-03-17 14:24:21,001 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=1808, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1863, PETRI_PLACES=200, PETRI_TRANSITIONS=179} [2025-03-17 14:24:21,001 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 122 predicate places. [2025-03-17 14:24:21,001 INFO L471 AbstractCegarLoop]: Abstraction has has 200 places, 179 transitions, 1863 flow [2025-03-17 14:24:21,001 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:24:21,001 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:24:21,001 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] [2025-03-17 14:24:21,002 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2025-03-17 14:24:21,002 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-17 14:24:21,002 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:24:21,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1077129872, now seen corresponding path program 4 times [2025-03-17 14:24:21,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:24:21,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541864404] [2025-03-17 14:24:21,002 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 14:24:21,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:24:21,008 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 37 statements into 2 equivalence classes. [2025-03-17 14:24:21,010 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 25 of 37 statements. [2025-03-17 14:24:21,010 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-17 14:24:21,011 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:24:21,199 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-03-17 14:24:21,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:24:21,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541864404] [2025-03-17 14:24:21,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541864404] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:24:21,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:24:21,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2025-03-17 14:24:21,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139146689] [2025-03-17 14:24:21,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:24:21,199 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 14:24:21,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:24:21,200 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 14:24:21,200 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2025-03-17 14:24:21,353 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 82 [2025-03-17 14:24:21,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 179 transitions, 1863 flow. Second operand has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:24:21,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:24:21,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 82 [2025-03-17 14:24:21,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:24:24,784 INFO L124 PetriNetUnfolderBase]: 12284/25972 cut-off events. [2025-03-17 14:24:24,784 INFO L125 PetriNetUnfolderBase]: For 45952/47022 co-relation queries the response was YES. [2025-03-17 14:24:25,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80545 conditions, 25972 events. 12284/25972 cut-off events. For 45952/47022 co-relation queries the response was YES. Maximal size of possible extension queue 1378. Compared 268889 event pairs, 2432 based on Foata normal form. 1060/26571 useless extension candidates. Maximal degree in co-relation 79861. Up to 10386 conditions per place. [2025-03-17 14:24:25,422 INFO L140 encePairwiseOnDemand]: 73/82 looper letters, 269 selfloop transitions, 9 changer transitions 6/297 dead transitions. [2025-03-17 14:24:25,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 297 transitions, 3126 flow [2025-03-17 14:24:25,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-17 14:24:25,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-17 14:24:25,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 571 transitions. [2025-03-17 14:24:25,424 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6963414634146341 [2025-03-17 14:24:25,424 INFO L175 Difference]: Start difference. First operand has 200 places, 179 transitions, 1863 flow. Second operand 10 states and 571 transitions. [2025-03-17 14:24:25,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 297 transitions, 3126 flow [2025-03-17 14:24:26,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 297 transitions, 3063 flow, removed 19 selfloop flow, removed 5 redundant places. [2025-03-17 14:24:26,189 INFO L231 Difference]: Finished difference. Result has 210 places, 184 transitions, 1925 flow [2025-03-17 14:24:26,189 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=1842, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1925, PETRI_PLACES=210, PETRI_TRANSITIONS=184} [2025-03-17 14:24:26,189 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 132 predicate places. [2025-03-17 14:24:26,189 INFO L471 AbstractCegarLoop]: Abstraction has has 210 places, 184 transitions, 1925 flow [2025-03-17 14:24:26,190 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:24:26,190 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:24:26,190 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] [2025-03-17 14:24:26,190 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2025-03-17 14:24:26,190 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-17 14:24:26,190 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:24:26,190 INFO L85 PathProgramCache]: Analyzing trace with hash -223717414, now seen corresponding path program 5 times [2025-03-17 14:24:26,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:24:26,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350076932] [2025-03-17 14:24:26,190 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 14:24:26,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:24:26,197 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 37 statements into 4 equivalence classes. [2025-03-17 14:24:26,211 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 37 of 37 statements. [2025-03-17 14:24:26,212 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-03-17 14:24:26,212 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:24:26,677 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-03-17 14:24:26,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:24:26,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350076932] [2025-03-17 14:24:26,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350076932] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:24:26,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:24:26,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2025-03-17 14:24:26,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167363398] [2025-03-17 14:24:26,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:24:26,678 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 14:24:26,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:24:26,679 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 14:24:26,679 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2025-03-17 14:24:27,082 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 82 [2025-03-17 14:24:27,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 184 transitions, 1925 flow. Second operand has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:24:27,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:24:27,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 82 [2025-03-17 14:24:27,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:24:30,417 INFO L124 PetriNetUnfolderBase]: 12524/26598 cut-off events. [2025-03-17 14:24:30,417 INFO L125 PetriNetUnfolderBase]: For 57945/58795 co-relation queries the response was YES. [2025-03-17 14:24:30,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85345 conditions, 26598 events. 12524/26598 cut-off events. For 57945/58795 co-relation queries the response was YES. Maximal size of possible extension queue 1373. Compared 277659 event pairs, 2836 based on Foata normal form. 860/26940 useless extension candidates. Maximal degree in co-relation 84655. Up to 17350 conditions per place. [2025-03-17 14:24:30,732 INFO L140 encePairwiseOnDemand]: 73/82 looper letters, 209 selfloop transitions, 19 changer transitions 6/247 dead transitions. [2025-03-17 14:24:30,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 247 transitions, 2790 flow [2025-03-17 14:24:30,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-17 14:24:30,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-17 14:24:30,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 544 transitions. [2025-03-17 14:24:30,733 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6634146341463415 [2025-03-17 14:24:30,733 INFO L175 Difference]: Start difference. First operand has 210 places, 184 transitions, 1925 flow. Second operand 10 states and 544 transitions. [2025-03-17 14:24:30,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 247 transitions, 2790 flow [2025-03-17 14:24:31,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 247 transitions, 2741 flow, removed 22 selfloop flow, removed 3 redundant places. [2025-03-17 14:24:31,981 INFO L231 Difference]: Finished difference. Result has 219 places, 190 transitions, 2024 flow [2025-03-17 14:24:31,981 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=1902, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2024, PETRI_PLACES=219, PETRI_TRANSITIONS=190} [2025-03-17 14:24:31,982 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 141 predicate places. [2025-03-17 14:24:31,982 INFO L471 AbstractCegarLoop]: Abstraction has has 219 places, 190 transitions, 2024 flow [2025-03-17 14:24:31,982 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:24:31,982 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:24:31,982 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] [2025-03-17 14:24:31,982 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2025-03-17 14:24:31,983 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-17 14:24:31,983 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:24:31,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1548434298, now seen corresponding path program 6 times [2025-03-17 14:24:31,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:24:31,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136772108] [2025-03-17 14:24:31,983 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 14:24:31,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:24:31,992 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 37 statements into 4 equivalence classes. [2025-03-17 14:24:31,995 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) and asserted 25 of 37 statements. [2025-03-17 14:24:31,995 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2025-03-17 14:24:31,995 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:24:32,193 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-03-17 14:24:32,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:24:32,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136772108] [2025-03-17 14:24:32,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136772108] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:24:32,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:24:32,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2025-03-17 14:24:32,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737030824] [2025-03-17 14:24:32,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:24:32,194 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 14:24:32,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:24:32,194 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 14:24:32,194 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2025-03-17 14:24:32,437 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 82 [2025-03-17 14:24:32,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 190 transitions, 2024 flow. Second operand has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:24:32,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:24:32,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 82 [2025-03-17 14:24:32,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:24:36,014 INFO L124 PetriNetUnfolderBase]: 12817/27661 cut-off events. [2025-03-17 14:24:36,014 INFO L125 PetriNetUnfolderBase]: For 75021/75891 co-relation queries the response was YES. [2025-03-17 14:24:36,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92144 conditions, 27661 events. 12817/27661 cut-off events. For 75021/75891 co-relation queries the response was YES. Maximal size of possible extension queue 1447. Compared 293928 event pairs, 2180 based on Foata normal form. 880/28079 useless extension candidates. Maximal degree in co-relation 91371. Up to 15966 conditions per place. [2025-03-17 14:24:36,361 INFO L140 encePairwiseOnDemand]: 73/82 looper letters, 247 selfloop transitions, 13 changer transitions 7/280 dead transitions. [2025-03-17 14:24:36,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 280 transitions, 3101 flow [2025-03-17 14:24:36,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-17 14:24:36,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-17 14:24:36,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 563 transitions. [2025-03-17 14:24:36,362 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6865853658536586 [2025-03-17 14:24:36,363 INFO L175 Difference]: Start difference. First operand has 219 places, 190 transitions, 2024 flow. Second operand 10 states and 563 transitions. [2025-03-17 14:24:36,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 280 transitions, 3101 flow [2025-03-17 14:24:37,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 280 transitions, 3029 flow, removed 18 selfloop flow, removed 5 redundant places. [2025-03-17 14:24:37,478 INFO L231 Difference]: Finished difference. Result has 228 places, 194 transitions, 2064 flow [2025-03-17 14:24:37,478 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=1962, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2064, PETRI_PLACES=228, PETRI_TRANSITIONS=194} [2025-03-17 14:24:37,479 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 150 predicate places. [2025-03-17 14:24:37,479 INFO L471 AbstractCegarLoop]: Abstraction has has 228 places, 194 transitions, 2064 flow [2025-03-17 14:24:37,479 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:24:37,479 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:24:37,479 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] [2025-03-17 14:24:37,479 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2025-03-17 14:24:37,479 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-17 14:24:37,480 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:24:37,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1878623352, now seen corresponding path program 7 times [2025-03-17 14:24:37,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:24:37,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931079616] [2025-03-17 14:24:37,480 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-17 14:24:37,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:24:37,486 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-17 14:24:37,494 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-17 14:24:37,494 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:24:37,494 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:24:37,801 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-03-17 14:24:37,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:24:37,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931079616] [2025-03-17 14:24:37,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931079616] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:24:37,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:24:37,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2025-03-17 14:24:37,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936494902] [2025-03-17 14:24:37,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:24:37,802 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 14:24:37,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:24:37,803 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 14:24:37,803 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2025-03-17 14:24:38,167 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 82 [2025-03-17 14:24:38,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 194 transitions, 2064 flow. Second operand has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:24:38,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:24:38,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 82 [2025-03-17 14:24:38,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:24:42,369 INFO L124 PetriNetUnfolderBase]: 12867/28101 cut-off events. [2025-03-17 14:24:42,369 INFO L125 PetriNetUnfolderBase]: For 93359/94219 co-relation queries the response was YES. [2025-03-17 14:24:42,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95150 conditions, 28101 events. 12867/28101 cut-off events. For 93359/94219 co-relation queries the response was YES. Maximal size of possible extension queue 1467. Compared 301168 event pairs, 2586 based on Foata normal form. 870/28509 useless extension candidates. Maximal degree in co-relation 94251. Up to 15990 conditions per place. [2025-03-17 14:24:42,697 INFO L140 encePairwiseOnDemand]: 73/82 looper letters, 246 selfloop transitions, 17 changer transitions 6/282 dead transitions. [2025-03-17 14:24:42,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 282 transitions, 3162 flow [2025-03-17 14:24:42,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-17 14:24:42,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-17 14:24:42,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 559 transitions. [2025-03-17 14:24:42,698 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6817073170731708 [2025-03-17 14:24:42,698 INFO L175 Difference]: Start difference. First operand has 228 places, 194 transitions, 2064 flow. Second operand 10 states and 559 transitions. [2025-03-17 14:24:42,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 282 transitions, 3162 flow [2025-03-17 14:24:44,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 282 transitions, 3086 flow, removed 33 selfloop flow, removed 4 redundant places. [2025-03-17 14:24:44,353 INFO L231 Difference]: Finished difference. Result has 237 places, 197 transitions, 2133 flow [2025-03-17 14:24:44,353 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=2032, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2133, PETRI_PLACES=237, PETRI_TRANSITIONS=197} [2025-03-17 14:24:44,354 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 159 predicate places. [2025-03-17 14:24:44,354 INFO L471 AbstractCegarLoop]: Abstraction has has 237 places, 197 transitions, 2133 flow [2025-03-17 14:24:44,354 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:24:44,354 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:24:44,354 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] [2025-03-17 14:24:44,354 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2025-03-17 14:24:44,354 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-17 14:24:44,355 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:24:44,355 INFO L85 PathProgramCache]: Analyzing trace with hash 133563814, now seen corresponding path program 8 times [2025-03-17 14:24:44,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:24:44,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207825263] [2025-03-17 14:24:44,355 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:24:44,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:24:44,361 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 37 statements into 2 equivalence classes. [2025-03-17 14:24:44,364 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 25 of 37 statements. [2025-03-17 14:24:44,364 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 14:24:44,364 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:24:44,564 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-03-17 14:24:44,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:24:44,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207825263] [2025-03-17 14:24:44,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207825263] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:24:44,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:24:44,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2025-03-17 14:24:44,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486257707] [2025-03-17 14:24:44,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:24:44,565 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 14:24:44,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:24:44,565 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 14:24:44,565 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2025-03-17 14:24:44,760 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 82 [2025-03-17 14:24:44,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 197 transitions, 2133 flow. Second operand has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:24:44,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:24:44,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 82 [2025-03-17 14:24:44,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:24:48,793 INFO L124 PetriNetUnfolderBase]: 13149/28771 cut-off events. [2025-03-17 14:24:48,793 INFO L125 PetriNetUnfolderBase]: For 107215/108103 co-relation queries the response was YES. [2025-03-17 14:24:49,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100090 conditions, 28771 events. 13149/28771 cut-off events. For 107215/108103 co-relation queries the response was YES. Maximal size of possible extension queue 1514. Compared 310681 event pairs, 2416 based on Foata normal form. 898/29173 useless extension candidates. Maximal degree in co-relation 99107. Up to 15966 conditions per place. [2025-03-17 14:24:49,441 INFO L140 encePairwiseOnDemand]: 73/82 looper letters, 245 selfloop transitions, 14 changer transitions 7/279 dead transitions. [2025-03-17 14:24:49,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 279 transitions, 3190 flow [2025-03-17 14:24:49,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-17 14:24:49,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-17 14:24:49,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 560 transitions. [2025-03-17 14:24:49,442 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6829268292682927 [2025-03-17 14:24:49,442 INFO L175 Difference]: Start difference. First operand has 237 places, 197 transitions, 2133 flow. Second operand 10 states and 560 transitions. [2025-03-17 14:24:49,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 279 transitions, 3190 flow [2025-03-17 14:24:50,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 279 transitions, 3079 flow, removed 47 selfloop flow, removed 5 redundant places. [2025-03-17 14:24:50,910 INFO L231 Difference]: Finished difference. Result has 243 places, 199 transitions, 2150 flow [2025-03-17 14:24:50,910 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=2086, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2150, PETRI_PLACES=243, PETRI_TRANSITIONS=199} [2025-03-17 14:24:50,911 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 165 predicate places. [2025-03-17 14:24:50,911 INFO L471 AbstractCegarLoop]: Abstraction has has 243 places, 199 transitions, 2150 flow [2025-03-17 14:24:50,911 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:24:50,911 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:24:50,911 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] [2025-03-17 14:24:50,911 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2025-03-17 14:24:50,911 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-17 14:24:50,912 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:24:50,912 INFO L85 PathProgramCache]: Analyzing trace with hash 209607160, now seen corresponding path program 9 times [2025-03-17 14:24:50,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:24:50,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807904077] [2025-03-17 14:24:50,912 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:24:50,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:24:50,920 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 37 statements into 4 equivalence classes. [2025-03-17 14:24:50,922 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 25 of 37 statements. [2025-03-17 14:24:50,922 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-03-17 14:24:50,922 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:24:51,077 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-03-17 14:24:51,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:24:51,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807904077] [2025-03-17 14:24:51,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807904077] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:24:51,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:24:51,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2025-03-17 14:24:51,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367843631] [2025-03-17 14:24:51,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:24:51,078 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 14:24:51,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:24:51,078 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 14:24:51,078 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2025-03-17 14:24:51,245 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 82 [2025-03-17 14:24:51,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 199 transitions, 2150 flow. Second operand has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:24:51,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:24:51,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 82 [2025-03-17 14:24:51,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:24:55,210 INFO L124 PetriNetUnfolderBase]: 13127/28781 cut-off events. [2025-03-17 14:24:55,210 INFO L125 PetriNetUnfolderBase]: For 83215/84075 co-relation queries the response was YES. [2025-03-17 14:24:55,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96316 conditions, 28781 events. 13127/28781 cut-off events. For 83215/84075 co-relation queries the response was YES. Maximal size of possible extension queue 1516. Compared 311189 event pairs, 2632 based on Foata normal form. 870/29181 useless extension candidates. Maximal degree in co-relation 95331. Up to 15990 conditions per place. [2025-03-17 14:24:55,497 INFO L140 encePairwiseOnDemand]: 73/82 looper letters, 247 selfloop transitions, 17 changer transitions 7/284 dead transitions. [2025-03-17 14:24:55,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 284 transitions, 3184 flow [2025-03-17 14:24:55,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-17 14:24:55,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-17 14:24:55,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 559 transitions. [2025-03-17 14:24:55,498 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6817073170731708 [2025-03-17 14:24:55,498 INFO L175 Difference]: Start difference. First operand has 243 places, 199 transitions, 2150 flow. Second operand 10 states and 559 transitions. [2025-03-17 14:24:55,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 284 transitions, 3184 flow [2025-03-17 14:24:56,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 284 transitions, 3135 flow, removed 10 selfloop flow, removed 7 redundant places. [2025-03-17 14:24:56,598 INFO L231 Difference]: Finished difference. Result has 248 places, 201 transitions, 2192 flow [2025-03-17 14:24:56,598 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=2115, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2192, PETRI_PLACES=248, PETRI_TRANSITIONS=201} [2025-03-17 14:24:56,598 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 170 predicate places. [2025-03-17 14:24:56,598 INFO L471 AbstractCegarLoop]: Abstraction has has 248 places, 201 transitions, 2192 flow [2025-03-17 14:24:56,598 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:24:56,598 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:24:56,598 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] [2025-03-17 14:24:56,599 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2025-03-17 14:24:56,599 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-17 14:24:56,599 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:24:56,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1796584250, now seen corresponding path program 10 times [2025-03-17 14:24:56,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:24:56,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994340266] [2025-03-17 14:24:56,599 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 14:24:56,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:24:56,608 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 37 statements into 2 equivalence classes. [2025-03-17 14:24:56,613 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 25 of 37 statements. [2025-03-17 14:24:56,614 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-17 14:24:56,614 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:24:56,789 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-03-17 14:24:56,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:24:56,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994340266] [2025-03-17 14:24:56,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994340266] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:24:56,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:24:56,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2025-03-17 14:24:56,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759094842] [2025-03-17 14:24:56,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:24:56,790 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 14:24:56,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:24:56,790 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 14:24:56,790 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2025-03-17 14:24:56,980 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 82 [2025-03-17 14:24:56,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 201 transitions, 2192 flow. Second operand has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:24:56,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:24:56,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 82 [2025-03-17 14:24:56,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:25:01,164 INFO L124 PetriNetUnfolderBase]: 13129/28841 cut-off events. [2025-03-17 14:25:01,165 INFO L125 PetriNetUnfolderBase]: For 86977/87795 co-relation queries the response was YES. [2025-03-17 14:25:01,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97115 conditions, 28841 events. 13129/28841 cut-off events. For 86977/87795 co-relation queries the response was YES. Maximal size of possible extension queue 1515. Compared 311978 event pairs, 2656 based on Foata normal form. 828/29181 useless extension candidates. Maximal degree in co-relation 96127. Up to 15982 conditions per place. [2025-03-17 14:25:01,436 INFO L140 encePairwiseOnDemand]: 73/82 looper letters, 239 selfloop transitions, 20 changer transitions 6/278 dead transitions. [2025-03-17 14:25:01,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 278 transitions, 3182 flow [2025-03-17 14:25:01,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-17 14:25:01,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-17 14:25:01,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 553 transitions. [2025-03-17 14:25:01,437 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6743902439024391 [2025-03-17 14:25:01,437 INFO L175 Difference]: Start difference. First operand has 248 places, 201 transitions, 2192 flow. Second operand 10 states and 553 transitions. [2025-03-17 14:25:01,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 278 transitions, 3182 flow [2025-03-17 14:25:02,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 278 transitions, 3149 flow, removed 4 selfloop flow, removed 6 redundant places. [2025-03-17 14:25:02,740 INFO L231 Difference]: Finished difference. Result has 253 places, 203 transitions, 2250 flow [2025-03-17 14:25:02,740 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=2163, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2250, PETRI_PLACES=253, PETRI_TRANSITIONS=203} [2025-03-17 14:25:02,740 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 175 predicate places. [2025-03-17 14:25:02,740 INFO L471 AbstractCegarLoop]: Abstraction has has 253 places, 203 transitions, 2250 flow [2025-03-17 14:25:02,741 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:25:02,741 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:25:02,741 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] [2025-03-17 14:25:02,741 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2025-03-17 14:25:02,741 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-17 14:25:02,741 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:25:02,741 INFO L85 PathProgramCache]: Analyzing trace with hash -202909130, now seen corresponding path program 11 times [2025-03-17 14:25:02,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:25:02,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627467471] [2025-03-17 14:25:02,742 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 14:25:02,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:25:02,750 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 37 statements into 4 equivalence classes. [2025-03-17 14:25:02,762 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 37 of 37 statements. [2025-03-17 14:25:02,762 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-03-17 14:25:02,762 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:25:03,069 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-03-17 14:25:03,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:25:03,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627467471] [2025-03-17 14:25:03,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627467471] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:25:03,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:25:03,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2025-03-17 14:25:03,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523380492] [2025-03-17 14:25:03,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:25:03,070 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 14:25:03,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:25:03,071 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 14:25:03,071 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2025-03-17 14:25:03,249 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 82 [2025-03-17 14:25:03,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 203 transitions, 2250 flow. Second operand has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:25:03,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:25:03,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 82 [2025-03-17 14:25:03,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand