./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 48c9605d Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 670814d0a16da58b0f26835e20c05a244e2f373856f13b9d4ff2a931783edf81 --- Real Ultimate output --- This is Ultimate 0.3.0-?-48c9605-m [2025-02-08 08:43:29,049 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-08 08:43:29,110 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-02-08 08:43:29,116 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-08 08:43:29,116 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-08 08:43:29,134 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-08 08:43:29,135 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-08 08:43:29,135 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-08 08:43:29,135 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-08 08:43:29,135 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-08 08:43:29,136 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-08 08:43:29,136 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-08 08:43:29,136 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-08 08:43:29,136 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-08 08:43:29,136 INFO L153 SettingsManager]: * Use SBE=true [2025-02-08 08:43:29,136 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-08 08:43:29,136 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-08 08:43:29,136 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-08 08:43:29,136 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-08 08:43:29,137 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-08 08:43:29,137 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-02-08 08:43:29,137 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-02-08 08:43:29,137 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-02-08 08:43:29,137 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-08 08:43:29,137 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-02-08 08:43:29,137 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-08 08:43:29,137 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-08 08:43:29,137 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-08 08:43:29,137 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-08 08:43:29,137 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-08 08:43:29,138 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-08 08:43:29,138 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-08 08:43:29,138 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-08 08:43:29,138 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 08:43:29,138 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-08 08:43:29,138 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-08 08:43:29,138 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-08 08:43:29,138 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-08 08:43:29,138 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-08 08:43:29,138 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-08 08:43:29,138 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-08 08:43:29,138 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-08 08:43:29,138 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 670814d0a16da58b0f26835e20c05a244e2f373856f13b9d4ff2a931783edf81 [2025-02-08 08:43:29,389 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-08 08:43:29,397 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-08 08:43:29,399 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-08 08:43:29,399 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-08 08:43:29,400 INFO L274 PluginConnector]: CDTParser initialized [2025-02-08 08:43:29,400 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c [2025-02-08 08:43:30,644 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/087b62abf/c778078277bd414d97e3af9e0e8a40a4/FLAG2dd926c7f [2025-02-08 08:43:30,914 INFO L384 CDTParser]: Found 1 translation units. [2025-02-08 08:43:30,915 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c [2025-02-08 08:43:30,947 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/087b62abf/c778078277bd414d97e3af9e0e8a40a4/FLAG2dd926c7f [2025-02-08 08:43:31,223 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/087b62abf/c778078277bd414d97e3af9e0e8a40a4 [2025-02-08 08:43:31,230 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-08 08:43:31,232 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-08 08:43:31,233 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-08 08:43:31,233 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-08 08:43:31,236 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-08 08:43:31,238 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 08:43:31" (1/1) ... [2025-02-08 08:43:31,239 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5015787d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:43:31, skipping insertion in model container [2025-02-08 08:43:31,239 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 08:43:31" (1/1) ... [2025-02-08 08:43:31,258 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-08 08:43:31,391 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-02-08 08:43:31,397 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 08:43:31,406 INFO L200 MainTranslator]: Completed pre-run [2025-02-08 08:43:31,428 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 08:43:31,442 INFO L204 MainTranslator]: Completed translation [2025-02-08 08:43:31,443 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:43:31 WrapperNode [2025-02-08 08:43:31,443 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-08 08:43:31,444 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-08 08:43:31,444 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-08 08:43:31,444 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-08 08:43:31,448 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:43:31" (1/1) ... [2025-02-08 08:43:31,453 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:43:31" (1/1) ... [2025-02-08 08:43:31,477 INFO L138 Inliner]: procedures = 25, calls = 43, calls flagged for inlining = 15, calls inlined = 23, statements flattened = 212 [2025-02-08 08:43:31,478 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-08 08:43:31,478 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-08 08:43:31,478 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-08 08:43:31,479 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-08 08:43:31,484 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:43:31" (1/1) ... [2025-02-08 08:43:31,484 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:43:31" (1/1) ... [2025-02-08 08:43:31,487 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:43:31" (1/1) ... [2025-02-08 08:43:31,511 INFO L175 MemorySlicer]: Split 18 memory accesses to 2 slices as follows [2, 16]. 89 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 4 writes are split as follows [0, 4]. [2025-02-08 08:43:31,511 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:43:31" (1/1) ... [2025-02-08 08:43:31,511 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:43:31" (1/1) ... [2025-02-08 08:43:31,521 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:43:31" (1/1) ... [2025-02-08 08:43:31,522 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:43:31" (1/1) ... [2025-02-08 08:43:31,526 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:43:31" (1/1) ... [2025-02-08 08:43:31,527 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:43:31" (1/1) ... [2025-02-08 08:43:31,529 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-08 08:43:31,533 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-08 08:43:31,533 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-08 08:43:31,533 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-08 08:43:31,534 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:43:31" (1/1) ... [2025-02-08 08:43:31,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 08:43:31,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:43:31,562 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-08 08:43:31,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-08 08:43:31,589 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-08 08:43:31,589 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-02-08 08:43:31,589 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-02-08 08:43:31,589 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-02-08 08:43:31,589 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-02-08 08:43:31,589 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-02-08 08:43:31,589 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-02-08 08:43:31,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-08 08:43:31,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-08 08:43:31,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-08 08:43:31,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-08 08:43:31,589 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-02-08 08:43:31,590 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-02-08 08:43:31,590 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-08 08:43:31,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-08 08:43:31,590 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-08 08:43:31,590 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-08 08:43:31,590 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-08 08:43:31,591 WARN L227 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-02-08 08:43:31,672 INFO L257 CfgBuilder]: Building ICFG [2025-02-08 08:43:31,673 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-08 08:43:31,796 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L64: ~p~0 := 1 + ~i~1#1; [2025-02-08 08:43:31,796 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L65: [2025-02-08 08:43:31,796 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L61-1: havoc #t~post9#1; [2025-02-08 08:43:31,796 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L61-2: ~i~1#1 := 1 + #t~post9#1; [2025-02-08 08:43:31,796 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L61-3: #t~post9#1 := ~i~1#1; [2025-02-08 08:43:31,796 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L63: havoc #t~ret8#1; [2025-02-08 08:43:31,796 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L63-1: havoc #t~mem7#1; [2025-02-08 08:43:31,797 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L63-2: havoc #t~mem6#1; [2025-02-08 08:43:31,797 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L63-3: SUMMARY for call write~int#1(#t~ret8#1, ~C~0.base, ~C~0.offset + 4 * ~i~1#1, 4); srcloc: null [2025-02-08 08:43:31,797 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L63-3: assume !(1 == #valid[~C~0.base]); [2025-02-08 08:43:31,797 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L63-3: assume !(4 + (~C~0.offset + 4 * ~i~1#1) <= #length[~C~0.base] && 0 <= ~C~0.offset + 4 * ~i~1#1); [2025-02-08 08:43:31,797 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L63-4: assume { :end_inline_plus } true;assume -2147483648 <= #t~ret8#1 && #t~ret8#1 <= 2147483647; [2025-02-08 08:43:31,797 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L63-5: havoc plus_#in~a#1, plus_#in~b#1; [2025-02-08 08:43:31,797 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L63-6: havoc plus_~a#1, plus_~b#1; [2025-02-08 08:43:31,797 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L63-7: #t~ret8#1 := plus_#res#1; [2025-02-08 08:43:31,999 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-08 08:43:32,000 INFO L308 CfgBuilder]: Performing block encoding [2025-02-08 08:43:32,286 WARN L149 AtomicBlockAnalyzer]: Unexpected successor node of atomic block begin: L133 is not an error location. [2025-02-08 08:43:32,287 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-08 08:43:32,287 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-08 08:43:32,288 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 08:43:32 BoogieIcfgContainer [2025-02-08 08:43:32,288 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-08 08:43:32,289 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-08 08:43:32,289 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-08 08:43:32,293 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-08 08:43:32,293 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.02 08:43:31" (1/3) ... [2025-02-08 08:43:32,293 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c563850 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 08:43:32, skipping insertion in model container [2025-02-08 08:43:32,293 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:43:31" (2/3) ... [2025-02-08 08:43:32,294 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c563850 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 08:43:32, skipping insertion in model container [2025-02-08 08:43:32,294 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 08:43:32" (3/3) ... [2025-02-08 08:43:32,295 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-three-array-max.wvr.c [2025-02-08 08:43:32,306 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-08 08:43:32,307 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-three-array-max.wvr.c that has 4 procedures, 79 locations, 1 initial locations, 6 loop locations, and 34 error locations. [2025-02-08 08:43:32,308 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-08 08:43:32,379 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2025-02-08 08:43:32,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 88 places, 86 transitions, 193 flow [2025-02-08 08:43:32,449 INFO L124 PetriNetUnfolderBase]: 8/83 cut-off events. [2025-02-08 08:43:32,452 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-02-08 08:43:32,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 83 events. 8/83 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 218 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 64. Up to 2 conditions per place. [2025-02-08 08:43:32,455 INFO L82 GeneralOperation]: Start removeDead. Operand has 88 places, 86 transitions, 193 flow [2025-02-08 08:43:32,461 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 84 places, 82 transitions, 182 flow [2025-02-08 08:43:32,469 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-08 08:43:32,481 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;@2e4f1573, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-08 08:43:32,481 INFO L334 AbstractCegarLoop]: Starting to check reachability of 51 error locations. [2025-02-08 08:43:32,488 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-08 08:43:32,488 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-02-08 08:43:32,488 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-08 08:43:32,489 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:43:32,489 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-08 08:43:32,489 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2025-02-08 08:43:32,497 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:43:32,498 INFO L85 PathProgramCache]: Analyzing trace with hash 775973, now seen corresponding path program 1 times [2025-02-08 08:43:32,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:43:32,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233186610] [2025-02-08 08:43:32,512 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:43:32,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:43:32,573 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-08 08:43:32,591 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-08 08:43:32,592 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:43:32,592 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:32,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:43:32,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:43:32,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233186610] [2025-02-08 08:43:32,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233186610] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:43:32,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:43:32,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-02-08 08:43:32,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000598417] [2025-02-08 08:43:32,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:43:32,676 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-08 08:43:32,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:43:32,694 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-08 08:43:32,694 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-08 08:43:32,731 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 86 [2025-02-08 08:43:32,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 82 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:43:32,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:43:32,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 86 [2025-02-08 08:43:32,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:43:33,178 INFO L124 PetriNetUnfolderBase]: 2654/3903 cut-off events. [2025-02-08 08:43:33,178 INFO L125 PetriNetUnfolderBase]: For 115/115 co-relation queries the response was YES. [2025-02-08 08:43:33,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7693 conditions, 3903 events. 2654/3903 cut-off events. For 115/115 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 22546 event pairs, 2061 based on Foata normal form. 1/2686 useless extension candidates. Maximal degree in co-relation 7178. Up to 3576 conditions per place. [2025-02-08 08:43:33,206 INFO L140 encePairwiseOnDemand]: 78/86 looper letters, 44 selfloop transitions, 2 changer transitions 0/75 dead transitions. [2025-02-08 08:43:33,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 75 transitions, 260 flow [2025-02-08 08:43:33,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-08 08:43:33,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-08 08:43:33,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 151 transitions. [2025-02-08 08:43:33,214 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5852713178294574 [2025-02-08 08:43:33,215 INFO L175 Difference]: Start difference. First operand has 84 places, 82 transitions, 182 flow. Second operand 3 states and 151 transitions. [2025-02-08 08:43:33,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 75 transitions, 260 flow [2025-02-08 08:43:33,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 75 transitions, 248 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-02-08 08:43:33,230 INFO L231 Difference]: Finished difference. Result has 73 places, 75 transitions, 160 flow [2025-02-08 08:43:33,232 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=71, 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=160, PETRI_PLACES=73, PETRI_TRANSITIONS=75} [2025-02-08 08:43:33,234 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -11 predicate places. [2025-02-08 08:43:33,234 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 75 transitions, 160 flow [2025-02-08 08:43:33,234 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:43:33,234 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:43:33,234 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-08 08:43:33,235 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-08 08:43:33,235 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2025-02-08 08:43:33,235 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:43:33,235 INFO L85 PathProgramCache]: Analyzing trace with hash 775974, now seen corresponding path program 1 times [2025-02-08 08:43:33,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:43:33,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145548627] [2025-02-08 08:43:33,235 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:43:33,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:43:33,241 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-08 08:43:33,258 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-08 08:43:33,258 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:43:33,258 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:33,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:43:33,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:43:33,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145548627] [2025-02-08 08:43:33,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145548627] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:43:33,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:43:33,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-08 08:43:33,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502137690] [2025-02-08 08:43:33,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:43:33,529 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:43:33,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:43:33,529 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:43:33,529 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:43:33,579 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 86 [2025-02-08 08:43:33,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 75 transitions, 160 flow. Second operand has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 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) [2025-02-08 08:43:33,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:43:33,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 86 [2025-02-08 08:43:33,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:43:33,971 INFO L124 PetriNetUnfolderBase]: 2655/3906 cut-off events. [2025-02-08 08:43:33,972 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2025-02-08 08:43:33,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7565 conditions, 3906 events. 2655/3906 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 22536 event pairs, 2061 based on Foata normal form. 0/2685 useless extension candidates. Maximal degree in co-relation 7528. Up to 3589 conditions per place. [2025-02-08 08:43:33,996 INFO L140 encePairwiseOnDemand]: 82/86 looper letters, 49 selfloop transitions, 3 changer transitions 0/78 dead transitions. [2025-02-08 08:43:33,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 78 transitions, 270 flow [2025-02-08 08:43:33,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-08 08:43:33,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-08 08:43:33,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 152 transitions. [2025-02-08 08:43:33,998 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5891472868217055 [2025-02-08 08:43:33,998 INFO L175 Difference]: Start difference. First operand has 73 places, 75 transitions, 160 flow. Second operand 3 states and 152 transitions. [2025-02-08 08:43:33,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 78 transitions, 270 flow [2025-02-08 08:43:33,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 78 transitions, 266 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:43:34,000 INFO L231 Difference]: Finished difference. Result has 74 places, 77 transitions, 175 flow [2025-02-08 08:43:34,000 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=71, 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=175, PETRI_PLACES=74, PETRI_TRANSITIONS=77} [2025-02-08 08:43:34,001 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -10 predicate places. [2025-02-08 08:43:34,001 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 77 transitions, 175 flow [2025-02-08 08:43:34,001 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 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) [2025-02-08 08:43:34,001 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:43:34,001 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2025-02-08 08:43:34,001 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-08 08:43:34,002 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2025-02-08 08:43:34,002 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:43:34,002 INFO L85 PathProgramCache]: Analyzing trace with hash 24056976, now seen corresponding path program 1 times [2025-02-08 08:43:34,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:43:34,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063033342] [2025-02-08 08:43:34,002 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:43:34,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:43:34,009 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-02-08 08:43:34,013 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-02-08 08:43:34,013 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:43:34,013 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:34,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:43:34,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:43:34,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063033342] [2025-02-08 08:43:34,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063033342] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:43:34,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:43:34,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-08 08:43:34,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693169076] [2025-02-08 08:43:34,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:43:34,063 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-08 08:43:34,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:43:34,063 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-08 08:43:34,064 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-08 08:43:34,069 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 86 [2025-02-08 08:43:34,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 77 transitions, 175 flow. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:43:34,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:43:34,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 86 [2025-02-08 08:43:34,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:43:34,300 INFO L124 PetriNetUnfolderBase]: 2654/3905 cut-off events. [2025-02-08 08:43:34,300 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2025-02-08 08:43:34,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7565 conditions, 3905 events. 2654/3905 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 22599 event pairs, 2061 based on Foata normal form. 1/2689 useless extension candidates. Maximal degree in co-relation 7552. Up to 3585 conditions per place. [2025-02-08 08:43:34,320 INFO L140 encePairwiseOnDemand]: 83/86 looper letters, 46 selfloop transitions, 2 changer transitions 0/77 dead transitions. [2025-02-08 08:43:34,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 77 transitions, 268 flow [2025-02-08 08:43:34,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-08 08:43:34,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-08 08:43:34,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 157 transitions. [2025-02-08 08:43:34,321 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6085271317829457 [2025-02-08 08:43:34,321 INFO L175 Difference]: Start difference. First operand has 74 places, 77 transitions, 175 flow. Second operand 3 states and 157 transitions. [2025-02-08 08:43:34,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 77 transitions, 268 flow [2025-02-08 08:43:34,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 77 transitions, 266 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-08 08:43:34,323 INFO L231 Difference]: Finished difference. Result has 75 places, 76 transitions, 172 flow [2025-02-08 08:43:34,323 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=73, 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=172, PETRI_PLACES=75, PETRI_TRANSITIONS=76} [2025-02-08 08:43:34,323 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -9 predicate places. [2025-02-08 08:43:34,324 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 76 transitions, 172 flow [2025-02-08 08:43:34,324 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:43:34,324 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:43:34,324 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2025-02-08 08:43:34,324 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-02-08 08:43:34,324 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2025-02-08 08:43:34,325 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:43:34,325 INFO L85 PathProgramCache]: Analyzing trace with hash 745734525, now seen corresponding path program 1 times [2025-02-08 08:43:34,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:43:34,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620587345] [2025-02-08 08:43:34,325 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:43:34,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:43:34,335 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-08 08:43:34,343 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-08 08:43:34,345 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:43:34,345 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:34,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:43:34,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:43:34,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620587345] [2025-02-08 08:43:34,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620587345] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:43:34,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650124236] [2025-02-08 08:43:34,625 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:43:34,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:43:34,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:43:34,632 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:43:34,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-08 08:43:34,679 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-08 08:43:34,688 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-08 08:43:34,688 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:43:34,688 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:34,690 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-02-08 08:43:34,696 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:43:34,762 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2025-02-08 08:43:34,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:43:34,942 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:43:35,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:43:35,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650124236] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:43:35,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:43:35,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2025-02-08 08:43:35,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194341631] [2025-02-08 08:43:35,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:43:35,030 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-08 08:43:35,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:43:35,030 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-08 08:43:35,030 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2025-02-08 08:43:35,275 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 86 [2025-02-08 08:43:35,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 76 transitions, 172 flow. Second operand has 11 states, 11 states have (on average 34.36363636363637) internal successors, (378), 11 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:43:35,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:43:35,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 86 [2025-02-08 08:43:35,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:43:35,726 INFO L124 PetriNetUnfolderBase]: 2654/3904 cut-off events. [2025-02-08 08:43:35,727 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2025-02-08 08:43:35,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7566 conditions, 3904 events. 2654/3904 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 22631 event pairs, 2061 based on Foata normal form. 0/2685 useless extension candidates. Maximal degree in co-relation 7552. Up to 3582 conditions per place. [2025-02-08 08:43:35,752 INFO L140 encePairwiseOnDemand]: 79/86 looper letters, 43 selfloop transitions, 7 changer transitions 0/76 dead transitions. [2025-02-08 08:43:35,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 76 transitions, 270 flow [2025-02-08 08:43:35,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-08 08:43:35,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-08 08:43:35,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 249 transitions. [2025-02-08 08:43:35,754 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48255813953488375 [2025-02-08 08:43:35,754 INFO L175 Difference]: Start difference. First operand has 75 places, 76 transitions, 172 flow. Second operand 6 states and 249 transitions. [2025-02-08 08:43:35,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 76 transitions, 270 flow [2025-02-08 08:43:35,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 76 transitions, 266 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:43:35,756 INFO L231 Difference]: Finished difference. Result has 78 places, 76 transitions, 186 flow [2025-02-08 08:43:35,756 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=186, PETRI_PLACES=78, PETRI_TRANSITIONS=76} [2025-02-08 08:43:35,756 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -6 predicate places. [2025-02-08 08:43:35,756 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 76 transitions, 186 flow [2025-02-08 08:43:35,759 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 34.36363636363637) internal successors, (378), 11 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:43:35,759 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:43:35,761 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-02-08 08:43:35,772 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-08 08:43:35,965 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:43:35,966 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2025-02-08 08:43:35,966 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:43:35,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1642935577, now seen corresponding path program 1 times [2025-02-08 08:43:35,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:43:35,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020967410] [2025-02-08 08:43:35,967 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:43:35,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:43:35,974 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-08 08:43:35,980 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-08 08:43:35,980 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:43:35,980 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:36,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:43:36,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:43:36,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020967410] [2025-02-08 08:43:36,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020967410] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:43:36,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681595687] [2025-02-08 08:43:36,133 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:43:36,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:43:36,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:43:36,136 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:43:36,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-08 08:43:36,177 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-08 08:43:36,186 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-08 08:43:36,187 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:43:36,187 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:36,188 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-02-08 08:43:36,189 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:43:36,204 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 [2025-02-08 08:43:36,278 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-02-08 08:43:36,278 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2025-02-08 08:43:36,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:43:36,301 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:43:36,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:43:36,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681595687] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-08 08:43:36,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-08 08:43:36,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 3] total 9 [2025-02-08 08:43:36,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757860105] [2025-02-08 08:43:36,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:43:36,358 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:43:36,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:43:36,358 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:43:36,358 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2025-02-08 08:43:36,423 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 86 [2025-02-08 08:43:36,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 76 transitions, 186 flow. Second operand has 5 states, 5 states have (on average 34.2) internal successors, (171), 5 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:43:36,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:43:36,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 86 [2025-02-08 08:43:36,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:43:36,711 INFO L124 PetriNetUnfolderBase]: 2656/3910 cut-off events. [2025-02-08 08:43:36,711 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2025-02-08 08:43:36,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7587 conditions, 3910 events. 2656/3910 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 22608 event pairs, 2061 based on Foata normal form. 2/2693 useless extension candidates. Maximal degree in co-relation 7558. Up to 3587 conditions per place. [2025-02-08 08:43:36,726 INFO L140 encePairwiseOnDemand]: 77/86 looper letters, 49 selfloop transitions, 7 changer transitions 0/82 dead transitions. [2025-02-08 08:43:36,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 82 transitions, 310 flow [2025-02-08 08:43:36,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 08:43:36,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 08:43:36,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 190 transitions. [2025-02-08 08:43:36,728 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5523255813953488 [2025-02-08 08:43:36,728 INFO L175 Difference]: Start difference. First operand has 78 places, 76 transitions, 186 flow. Second operand 4 states and 190 transitions. [2025-02-08 08:43:36,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 82 transitions, 310 flow [2025-02-08 08:43:36,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 82 transitions, 298 flow, removed 2 selfloop flow, removed 3 redundant places. [2025-02-08 08:43:36,731 INFO L231 Difference]: Finished difference. Result has 80 places, 80 transitions, 221 flow [2025-02-08 08:43:36,731 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=221, PETRI_PLACES=80, PETRI_TRANSITIONS=80} [2025-02-08 08:43:36,732 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -4 predicate places. [2025-02-08 08:43:36,733 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 80 transitions, 221 flow [2025-02-08 08:43:36,734 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 34.2) internal successors, (171), 5 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:43:36,734 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:43:36,734 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:43:36,746 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-02-08 08:43:36,934 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:43:36,935 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2025-02-08 08:43:36,935 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:43:36,935 INFO L85 PathProgramCache]: Analyzing trace with hash -608602897, now seen corresponding path program 1 times [2025-02-08 08:43:36,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:43:36,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866722169] [2025-02-08 08:43:36,936 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:43:36,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:43:36,943 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-02-08 08:43:36,949 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-02-08 08:43:36,949 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:43:36,949 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:36,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:43:36,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:43:36,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866722169] [2025-02-08 08:43:36,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866722169] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:43:36,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:43:36,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-08 08:43:36,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954392362] [2025-02-08 08:43:36,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:43:36,997 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:43:36,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:43:36,997 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:43:36,997 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:43:37,007 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 86 [2025-02-08 08:43:37,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 80 transitions, 221 flow. Second operand has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:43:37,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:43:37,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 86 [2025-02-08 08:43:37,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:43:37,343 INFO L124 PetriNetUnfolderBase]: 2654/3908 cut-off events. [2025-02-08 08:43:37,344 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2025-02-08 08:43:37,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7593 conditions, 3908 events. 2654/3908 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 22603 event pairs, 2061 based on Foata normal form. 2/2695 useless extension candidates. Maximal degree in co-relation 7563. Up to 3584 conditions per place. [2025-02-08 08:43:37,360 INFO L140 encePairwiseOnDemand]: 79/86 looper letters, 46 selfloop transitions, 6 changer transitions 0/80 dead transitions. [2025-02-08 08:43:37,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 80 transitions, 319 flow [2025-02-08 08:43:37,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 08:43:37,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 08:43:37,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 198 transitions. [2025-02-08 08:43:37,363 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5755813953488372 [2025-02-08 08:43:37,364 INFO L175 Difference]: Start difference. First operand has 80 places, 80 transitions, 221 flow. Second operand 4 states and 198 transitions. [2025-02-08 08:43:37,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 80 transitions, 319 flow [2025-02-08 08:43:37,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 80 transitions, 313 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:43:37,366 INFO L231 Difference]: Finished difference. Result has 81 places, 78 transitions, 217 flow [2025-02-08 08:43:37,367 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=217, PETRI_PLACES=81, PETRI_TRANSITIONS=78} [2025-02-08 08:43:37,368 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -3 predicate places. [2025-02-08 08:43:37,368 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 78 transitions, 217 flow [2025-02-08 08:43:37,368 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:43:37,368 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:43:37,368 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2025-02-08 08:43:37,368 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-02-08 08:43:37,368 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2025-02-08 08:43:37,369 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:43:37,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1686851143, now seen corresponding path program 1 times [2025-02-08 08:43:37,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:43:37,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042741212] [2025-02-08 08:43:37,369 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:43:37,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:43:37,375 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-08 08:43:37,381 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-08 08:43:37,383 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:43:37,383 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:37,464 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:43:37,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:43:37,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042741212] [2025-02-08 08:43:37,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042741212] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:43:37,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492507739] [2025-02-08 08:43:37,465 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:43:37,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:43:37,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:43:37,469 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:43:37,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-08 08:43:37,517 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-08 08:43:37,529 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-08 08:43:37,530 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:43:37,530 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:37,531 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-08 08:43:37,531 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:43:37,583 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:43:37,585 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:43:37,635 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:43:37,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492507739] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:43:37,636 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:43:37,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2025-02-08 08:43:37,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388867776] [2025-02-08 08:43:37,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:43:37,636 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-08 08:43:37,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:43:37,637 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-08 08:43:37,637 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2025-02-08 08:43:37,714 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 86 [2025-02-08 08:43:37,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 78 transitions, 217 flow. Second operand has 13 states, 13 states have (on average 37.53846153846154) internal successors, (488), 13 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:43:37,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:43:37,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 86 [2025-02-08 08:43:37,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:43:38,274 INFO L124 PetriNetUnfolderBase]: 5307/7815 cut-off events. [2025-02-08 08:43:38,274 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2025-02-08 08:43:38,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15180 conditions, 7815 events. 5307/7815 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 48712 event pairs, 4122 based on Foata normal form. 2/5508 useless extension candidates. Maximal degree in co-relation 7588. Up to 3582 conditions per place. [2025-02-08 08:43:38,357 INFO L140 encePairwiseOnDemand]: 76/86 looper letters, 81 selfloop transitions, 22 changer transitions 0/131 dead transitions. [2025-02-08 08:43:38,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 131 transitions, 576 flow [2025-02-08 08:43:38,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-08 08:43:38,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-08 08:43:38,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 393 transitions. [2025-02-08 08:43:38,360 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5712209302325582 [2025-02-08 08:43:38,360 INFO L175 Difference]: Start difference. First operand has 81 places, 78 transitions, 217 flow. Second operand 8 states and 393 transitions. [2025-02-08 08:43:38,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 131 transitions, 576 flow [2025-02-08 08:43:38,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 131 transitions, 554 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-08 08:43:38,363 INFO L231 Difference]: Finished difference. Result has 87 places, 91 transitions, 334 flow [2025-02-08 08:43:38,364 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=334, PETRI_PLACES=87, PETRI_TRANSITIONS=91} [2025-02-08 08:43:38,364 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 3 predicate places. [2025-02-08 08:43:38,365 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 91 transitions, 334 flow [2025-02-08 08:43:38,365 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 37.53846153846154) internal successors, (488), 13 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:43:38,366 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:43:38,366 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2025-02-08 08:43:38,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-02-08 08:43:38,570 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:43:38,570 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2025-02-08 08:43:38,571 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:43:38,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1466787266, now seen corresponding path program 2 times [2025-02-08 08:43:38,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:43:38,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013784196] [2025-02-08 08:43:38,571 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:43:38,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:43:38,578 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 10 statements into 2 equivalence classes. [2025-02-08 08:43:38,592 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 10 of 10 statements. [2025-02-08 08:43:38,594 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:43:38,594 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:38,776 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:43:38,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:43:38,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013784196] [2025-02-08 08:43:38,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013784196] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:43:38,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81051755] [2025-02-08 08:43:38,777 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:43:38,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:43:38,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:43:38,779 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:43:38,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-08 08:43:38,817 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 10 statements into 2 equivalence classes. [2025-02-08 08:43:38,832 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 10 of 10 statements. [2025-02-08 08:43:38,832 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:43:38,832 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:38,834 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-02-08 08:43:38,835 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:43:38,846 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 [2025-02-08 08:43:38,946 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-02-08 08:43:38,947 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2025-02-08 08:43:39,017 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:43:39,018 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:43:39,139 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:43:39,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81051755] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:43:39,139 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:43:39,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2025-02-08 08:43:39,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369645539] [2025-02-08 08:43:39,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:43:39,140 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-02-08 08:43:39,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:43:39,140 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-02-08 08:43:39,140 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2025-02-08 08:43:39,899 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 86 [2025-02-08 08:43:39,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 91 transitions, 334 flow. Second operand has 18 states, 18 states have (on average 34.666666666666664) internal successors, (624), 18 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:43:39,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:43:39,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 86 [2025-02-08 08:43:39,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:43:41,214 INFO L124 PetriNetUnfolderBase]: 7964/11734 cut-off events. [2025-02-08 08:43:41,214 INFO L125 PetriNetUnfolderBase]: For 71/71 co-relation queries the response was YES. [2025-02-08 08:43:41,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22871 conditions, 11734 events. 7964/11734 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 649. Compared 77799 event pairs, 6183 based on Foata normal form. 10/8341 useless extension candidates. Maximal degree in co-relation 15197. Up to 7162 conditions per place. [2025-02-08 08:43:41,261 INFO L140 encePairwiseOnDemand]: 74/86 looper letters, 94 selfloop transitions, 42 changer transitions 0/162 dead transitions. [2025-02-08 08:43:41,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 162 transitions, 909 flow [2025-02-08 08:43:41,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-02-08 08:43:41,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-02-08 08:43:41,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 641 transitions. [2025-02-08 08:43:41,264 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4968992248062015 [2025-02-08 08:43:41,264 INFO L175 Difference]: Start difference. First operand has 87 places, 91 transitions, 334 flow. Second operand 15 states and 641 transitions. [2025-02-08 08:43:41,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 162 transitions, 909 flow [2025-02-08 08:43:41,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 162 transitions, 871 flow, removed 11 selfloop flow, removed 1 redundant places. [2025-02-08 08:43:41,266 INFO L231 Difference]: Finished difference. Result has 106 places, 114 transitions, 612 flow [2025-02-08 08:43:41,267 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=612, PETRI_PLACES=106, PETRI_TRANSITIONS=114} [2025-02-08 08:43:41,267 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 22 predicate places. [2025-02-08 08:43:41,267 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 114 transitions, 612 flow [2025-02-08 08:43:41,268 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 34.666666666666664) internal successors, (624), 18 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:43:41,268 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:43:41,268 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:43:41,275 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-02-08 08:43:41,468 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2025-02-08 08:43:41,469 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2025-02-08 08:43:41,469 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:43:41,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1863340476, now seen corresponding path program 1 times [2025-02-08 08:43:41,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:43:41,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080270889] [2025-02-08 08:43:41,469 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:43:41,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:43:41,475 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-08 08:43:41,484 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-08 08:43:41,485 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:43:41,485 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:41,603 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:43:41,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:43:41,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080270889] [2025-02-08 08:43:41,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080270889] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:43:41,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:43:41,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-08 08:43:41,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604492874] [2025-02-08 08:43:41,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:43:41,604 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:43:41,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:43:41,605 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:43:41,605 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-08 08:43:41,651 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 86 [2025-02-08 08:43:41,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 114 transitions, 612 flow. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 5 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:43:41,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:43:41,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 86 [2025-02-08 08:43:41,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:43:42,316 INFO L124 PetriNetUnfolderBase]: 7769/11731 cut-off events. [2025-02-08 08:43:42,317 INFO L125 PetriNetUnfolderBase]: For 131/131 co-relation queries the response was YES. [2025-02-08 08:43:42,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22741 conditions, 11731 events. 7769/11731 cut-off events. For 131/131 co-relation queries the response was YES. Maximal size of possible extension queue 641. Compared 76808 event pairs, 6144 based on Foata normal form. 0/8308 useless extension candidates. Maximal degree in co-relation 22662. Up to 10522 conditions per place. [2025-02-08 08:43:42,521 INFO L140 encePairwiseOnDemand]: 78/86 looper letters, 76 selfloop transitions, 11 changer transitions 0/109 dead transitions. [2025-02-08 08:43:42,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 109 transitions, 776 flow [2025-02-08 08:43:42,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:43:42,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:43:42,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 187 transitions. [2025-02-08 08:43:42,523 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43488372093023253 [2025-02-08 08:43:42,523 INFO L175 Difference]: Start difference. First operand has 106 places, 114 transitions, 612 flow. Second operand 5 states and 187 transitions. [2025-02-08 08:43:42,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 109 transitions, 776 flow [2025-02-08 08:43:42,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 109 transitions, 727 flow, removed 7 selfloop flow, removed 5 redundant places. [2025-02-08 08:43:42,525 INFO L231 Difference]: Finished difference. Result has 100 places, 109 transitions, 575 flow [2025-02-08 08:43:42,526 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=553, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=575, PETRI_PLACES=100, PETRI_TRANSITIONS=109} [2025-02-08 08:43:42,526 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 16 predicate places. [2025-02-08 08:43:42,526 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 109 transitions, 575 flow [2025-02-08 08:43:42,526 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 5 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:43:42,526 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:43:42,526 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:43:42,527 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-02-08 08:43:42,527 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2025-02-08 08:43:42,527 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:43:42,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1863340475, now seen corresponding path program 1 times [2025-02-08 08:43:42,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:43:42,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816895959] [2025-02-08 08:43:42,527 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:43:42,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:43:42,532 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-08 08:43:42,538 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-08 08:43:42,539 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:43:42,539 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:42,765 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:43:42,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:43:42,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816895959] [2025-02-08 08:43:42,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816895959] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:43:42,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570729201] [2025-02-08 08:43:42,765 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:43:42,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:43:42,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:43:42,768 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:43:42,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-08 08:43:42,810 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-08 08:43:42,824 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-08 08:43:42,824 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:43:42,824 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:42,825 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-02-08 08:43:42,826 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:43:42,837 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 [2025-02-08 08:43:42,844 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 [2025-02-08 08:43:42,878 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-08 08:43:42,878 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 [2025-02-08 08:43:42,892 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 18 treesize of output 13 [2025-02-08 08:43:42,983 INFO L349 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2025-02-08 08:43:42,984 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2025-02-08 08:43:43,165 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:43:43,165 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:43:43,419 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:43:43,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570729201] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-08 08:43:43,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-08 08:43:43,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 12 [2025-02-08 08:43:43,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347931373] [2025-02-08 08:43:43,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:43:43,420 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-08 08:43:43,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:43:43,420 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-08 08:43:43,421 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2025-02-08 08:43:43,658 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 86 [2025-02-08 08:43:43,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 109 transitions, 575 flow. Second operand has 6 states, 6 states have (on average 34.833333333333336) internal successors, (209), 6 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:43:43,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:43:43,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 86 [2025-02-08 08:43:43,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:43:45,714 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-02-08 08:43:47,059 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-02-08 08:43:48,010 INFO L124 PetriNetUnfolderBase]: 6932/10240 cut-off events. [2025-02-08 08:43:48,011 INFO L125 PetriNetUnfolderBase]: For 115/115 co-relation queries the response was YES. [2025-02-08 08:43:48,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20054 conditions, 10240 events. 6932/10240 cut-off events. For 115/115 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 66544 event pairs, 5370 based on Foata normal form. 0/7246 useless extension candidates. Maximal degree in co-relation 19977. Up to 9364 conditions per place. [2025-02-08 08:43:48,168 INFO L140 encePairwiseOnDemand]: 80/86 looper letters, 73 selfloop transitions, 14 changer transitions 0/108 dead transitions. [2025-02-08 08:43:48,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 108 transitions, 751 flow [2025-02-08 08:43:48,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-08 08:43:48,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-08 08:43:48,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 248 transitions. [2025-02-08 08:43:48,170 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4806201550387597 [2025-02-08 08:43:48,170 INFO L175 Difference]: Start difference. First operand has 100 places, 109 transitions, 575 flow. Second operand 6 states and 248 transitions. [2025-02-08 08:43:48,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 108 transitions, 751 flow [2025-02-08 08:43:48,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 108 transitions, 736 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-08 08:43:48,172 INFO L231 Difference]: Finished difference. Result has 100 places, 107 transitions, 584 flow [2025-02-08 08:43:48,173 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=556, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=584, PETRI_PLACES=100, PETRI_TRANSITIONS=107} [2025-02-08 08:43:48,173 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 16 predicate places. [2025-02-08 08:43:48,173 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 107 transitions, 584 flow [2025-02-08 08:43:48,173 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 34.833333333333336) internal successors, (209), 6 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:43:48,173 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:43:48,174 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:43:48,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-02-08 08:43:48,374 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-02-08 08:43:48,375 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2025-02-08 08:43:48,375 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:43:48,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1928979105, now seen corresponding path program 1 times [2025-02-08 08:43:48,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:43:48,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864541895] [2025-02-08 08:43:48,375 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:43:48,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:43:48,380 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-08 08:43:48,385 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-08 08:43:48,385 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:43:48,385 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:48,444 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:43:48,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:43:48,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864541895] [2025-02-08 08:43:48,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864541895] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:43:48,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:43:48,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-08 08:43:48,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336085658] [2025-02-08 08:43:48,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:43:48,446 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:43:48,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:43:48,447 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:43:48,447 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-08 08:43:48,504 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 86 [2025-02-08 08:43:48,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 107 transitions, 584 flow. Second operand has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:43:48,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:43:48,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 86 [2025-02-08 08:43:48,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:43:49,115 INFO L124 PetriNetUnfolderBase]: 6677/10069 cut-off events. [2025-02-08 08:43:49,115 INFO L125 PetriNetUnfolderBase]: For 114/114 co-relation queries the response was YES. [2025-02-08 08:43:49,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19611 conditions, 10069 events. 6677/10069 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 64923 event pairs, 5280 based on Foata normal form. 0/7531 useless extension candidates. Maximal degree in co-relation 19534. Up to 9082 conditions per place. [2025-02-08 08:43:49,156 INFO L140 encePairwiseOnDemand]: 78/86 looper letters, 72 selfloop transitions, 13 changer transitions 0/102 dead transitions. [2025-02-08 08:43:49,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 102 transitions, 744 flow [2025-02-08 08:43:49,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:43:49,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:43:49,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 190 transitions. [2025-02-08 08:43:49,157 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2025-02-08 08:43:49,157 INFO L175 Difference]: Start difference. First operand has 100 places, 107 transitions, 584 flow. Second operand 5 states and 190 transitions. [2025-02-08 08:43:49,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 102 transitions, 744 flow [2025-02-08 08:43:49,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 102 transitions, 729 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-08 08:43:49,160 INFO L231 Difference]: Finished difference. Result has 96 places, 102 transitions, 585 flow [2025-02-08 08:43:49,161 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=559, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=585, PETRI_PLACES=96, PETRI_TRANSITIONS=102} [2025-02-08 08:43:49,161 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 12 predicate places. [2025-02-08 08:43:49,161 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 102 transitions, 585 flow [2025-02-08 08:43:49,161 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:43:49,161 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:43:49,162 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:43:49,162 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2025-02-08 08:43:49,162 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2025-02-08 08:43:49,162 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:43:49,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1928979104, now seen corresponding path program 1 times [2025-02-08 08:43:49,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:43:49,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215020066] [2025-02-08 08:43:49,162 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:43:49,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:43:49,171 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-08 08:43:49,183 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-08 08:43:49,183 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:43:49,184 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:49,341 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:43:49,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:43:49,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215020066] [2025-02-08 08:43:49,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215020066] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:43:49,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665421998] [2025-02-08 08:43:49,342 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:43:49,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:43:49,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:43:49,348 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:43:49,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-08 08:43:49,395 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-08 08:43:49,413 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-08 08:43:49,414 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:43:49,414 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:49,415 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-08 08:43:49,416 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:43:49,422 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 [2025-02-08 08:43:49,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-08 08:43:49,466 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 [2025-02-08 08:43:49,479 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-08 08:43:49,480 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 [2025-02-08 08:43:49,508 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:43:49,508 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:43:49,571 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 52 treesize of output 48 [2025-02-08 08:43:49,619 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:43:49,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665421998] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:43:49,619 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:43:49,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2025-02-08 08:43:49,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998491714] [2025-02-08 08:43:49,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:43:49,620 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-08 08:43:49,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:43:49,620 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-08 08:43:49,620 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2025-02-08 08:43:50,039 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 86 [2025-02-08 08:43:50,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 102 transitions, 585 flow. Second operand has 10 states, 10 states have (on average 33.5) internal successors, (335), 10 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:43:50,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:43:50,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 86 [2025-02-08 08:43:50,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:43:50,824 INFO L124 PetriNetUnfolderBase]: 5900/8746 cut-off events. [2025-02-08 08:43:50,824 INFO L125 PetriNetUnfolderBase]: For 115/115 co-relation queries the response was YES. [2025-02-08 08:43:50,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17187 conditions, 8746 events. 5900/8746 cut-off events. For 115/115 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 55391 event pairs, 4557 based on Foata normal form. 0/6400 useless extension candidates. Maximal degree in co-relation 17110. Up to 7993 conditions per place. [2025-02-08 08:43:50,886 INFO L140 encePairwiseOnDemand]: 77/86 looper letters, 63 selfloop transitions, 23 changer transitions 0/102 dead transitions. [2025-02-08 08:43:50,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 102 transitions, 765 flow [2025-02-08 08:43:50,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-08 08:43:50,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-08 08:43:50,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 300 transitions. [2025-02-08 08:43:50,888 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2025-02-08 08:43:50,888 INFO L175 Difference]: Start difference. First operand has 96 places, 102 transitions, 585 flow. Second operand 8 states and 300 transitions. [2025-02-08 08:43:50,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 102 transitions, 765 flow [2025-02-08 08:43:50,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 102 transitions, 746 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-08 08:43:50,893 INFO L231 Difference]: Finished difference. Result has 98 places, 100 transitions, 608 flow [2025-02-08 08:43:50,894 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=562, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=608, PETRI_PLACES=98, PETRI_TRANSITIONS=100} [2025-02-08 08:43:50,895 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 14 predicate places. [2025-02-08 08:43:50,895 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 100 transitions, 608 flow [2025-02-08 08:43:50,895 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 33.5) internal successors, (335), 10 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:43:50,895 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:43:50,895 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 1, 1, 1] [2025-02-08 08:43:50,902 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-02-08 08:43:51,100 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-02-08 08:43:51,100 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2025-02-08 08:43:51,101 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:43:51,101 INFO L85 PathProgramCache]: Analyzing trace with hash 447275947, now seen corresponding path program 3 times [2025-02-08 08:43:51,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:43:51,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916787587] [2025-02-08 08:43:51,101 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 08:43:51,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:43:51,108 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 14 statements into 4 equivalence classes. [2025-02-08 08:43:51,123 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 8 of 14 statements. [2025-02-08 08:43:51,123 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-08 08:43:51,123 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:51,305 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-02-08 08:43:51,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:43:51,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916787587] [2025-02-08 08:43:51,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916787587] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:43:51,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446223582] [2025-02-08 08:43:51,305 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 08:43:51,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:43:51,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:43:51,308 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:43:51,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-02-08 08:43:51,354 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 14 statements into 4 equivalence classes. [2025-02-08 08:43:51,367 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 8 of 14 statements. [2025-02-08 08:43:51,367 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-08 08:43:51,367 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:51,368 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-02-08 08:43:51,369 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:43:51,416 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 [2025-02-08 08:43:51,506 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-02-08 08:43:51,506 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:43:51,597 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-02-08 08:43:51,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446223582] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:43:51,598 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:43:51,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2025-02-08 08:43:51,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926010491] [2025-02-08 08:43:51,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:43:51,599 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-02-08 08:43:51,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:43:51,599 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-02-08 08:43:51,599 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2025-02-08 08:43:52,139 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 86 [2025-02-08 08:43:52,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 100 transitions, 608 flow. Second operand has 15 states, 15 states have (on average 34.86666666666667) internal successors, (523), 15 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:43:52,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:43:52,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 86 [2025-02-08 08:43:52,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:43:52,753 INFO L124 PetriNetUnfolderBase]: 5900/8742 cut-off events. [2025-02-08 08:43:52,753 INFO L125 PetriNetUnfolderBase]: For 131/131 co-relation queries the response was YES. [2025-02-08 08:43:52,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17176 conditions, 8742 events. 5900/8742 cut-off events. For 131/131 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 55452 event pairs, 4557 based on Foata normal form. 4/6400 useless extension candidates. Maximal degree in co-relation 17127. Up to 7993 conditions per place. [2025-02-08 08:43:52,796 INFO L140 encePairwiseOnDemand]: 74/86 looper letters, 37 selfloop transitions, 49 changer transitions 0/100 dead transitions. [2025-02-08 08:43:52,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 100 transitions, 766 flow [2025-02-08 08:43:52,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-08 08:43:52,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-08 08:43:52,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 250 transitions. [2025-02-08 08:43:52,797 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4844961240310077 [2025-02-08 08:43:52,797 INFO L175 Difference]: Start difference. First operand has 98 places, 100 transitions, 608 flow. Second operand 6 states and 250 transitions. [2025-02-08 08:43:52,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 100 transitions, 766 flow [2025-02-08 08:43:52,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 100 transitions, 709 flow, removed 4 selfloop flow, removed 8 redundant places. [2025-02-08 08:43:52,800 INFO L231 Difference]: Finished difference. Result has 93 places, 100 transitions, 687 flow [2025-02-08 08:43:52,800 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=525, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=687, PETRI_PLACES=93, PETRI_TRANSITIONS=100} [2025-02-08 08:43:52,801 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 9 predicate places. [2025-02-08 08:43:52,801 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 100 transitions, 687 flow [2025-02-08 08:43:52,801 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 34.86666666666667) internal successors, (523), 15 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:43:52,801 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:43:52,801 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:43:52,811 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-02-08 08:43:53,006 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:43:53,006 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2025-02-08 08:43:53,007 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:43:53,007 INFO L85 PathProgramCache]: Analyzing trace with hash 799432129, now seen corresponding path program 1 times [2025-02-08 08:43:53,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:43:53,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054187692] [2025-02-08 08:43:53,007 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:43:53,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:43:53,012 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-02-08 08:43:53,021 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-02-08 08:43:53,021 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:43:53,021 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:53,079 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:43:53,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:43:53,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054187692] [2025-02-08 08:43:53,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054187692] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:43:53,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994270382] [2025-02-08 08:43:53,080 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:43:53,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:43:53,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:43:53,082 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:43:53,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-02-08 08:43:53,126 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-02-08 08:43:53,143 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-02-08 08:43:53,144 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:43:53,144 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:53,144 INFO L256 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-02-08 08:43:53,145 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:43:53,189 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:43:53,189 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:43:53,229 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:43:53,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994270382] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:43:53,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:43:53,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2025-02-08 08:43:53,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458029491] [2025-02-08 08:43:53,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:43:53,230 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-08 08:43:53,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:43:53,231 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-08 08:43:53,232 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2025-02-08 08:43:53,296 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 86 [2025-02-08 08:43:53,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 100 transitions, 687 flow. Second operand has 12 states, 12 states have (on average 37.333333333333336) internal successors, (448), 12 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:43:53,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:43:53,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 86 [2025-02-08 08:43:53,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:43:53,685 INFO L124 PetriNetUnfolderBase]: 3627/5573 cut-off events. [2025-02-08 08:43:53,685 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2025-02-08 08:43:53,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11122 conditions, 5573 events. 3627/5573 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 33418 event pairs, 2586 based on Foata normal form. 0/4225 useless extension candidates. Maximal degree in co-relation 10888. Up to 3011 conditions per place. [2025-02-08 08:43:53,709 INFO L140 encePairwiseOnDemand]: 73/86 looper letters, 89 selfloop transitions, 44 changer transitions 0/146 dead transitions. [2025-02-08 08:43:53,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 146 transitions, 1065 flow [2025-02-08 08:43:53,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-08 08:43:53,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-08 08:43:53,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 425 transitions. [2025-02-08 08:43:53,712 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5490956072351422 [2025-02-08 08:43:53,712 INFO L175 Difference]: Start difference. First operand has 93 places, 100 transitions, 687 flow. Second operand 9 states and 425 transitions. [2025-02-08 08:43:53,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 146 transitions, 1065 flow [2025-02-08 08:43:53,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 146 transitions, 1040 flow, removed 4 selfloop flow, removed 2 redundant places. [2025-02-08 08:43:53,715 INFO L231 Difference]: Finished difference. Result has 101 places, 102 transitions, 771 flow [2025-02-08 08:43:53,715 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=666, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=771, PETRI_PLACES=101, PETRI_TRANSITIONS=102} [2025-02-08 08:43:53,716 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 17 predicate places. [2025-02-08 08:43:53,717 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 102 transitions, 771 flow [2025-02-08 08:43:53,717 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 37.333333333333336) internal successors, (448), 12 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:43:53,717 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:43:53,717 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] [2025-02-08 08:43:53,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-02-08 08:43:53,917 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:43:53,918 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2025-02-08 08:43:53,918 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:43:53,918 INFO L85 PathProgramCache]: Analyzing trace with hash -565654258, now seen corresponding path program 1 times [2025-02-08 08:43:53,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:43:53,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275903249] [2025-02-08 08:43:53,919 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:43:53,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:43:53,926 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-02-08 08:43:53,937 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-02-08 08:43:53,937 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:43:53,937 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:54,008 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:43:54,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:43:54,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275903249] [2025-02-08 08:43:54,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275903249] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:43:54,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828225449] [2025-02-08 08:43:54,009 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:43:54,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:43:54,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:43:54,011 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:43:54,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-02-08 08:43:54,058 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-02-08 08:43:54,077 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-02-08 08:43:54,077 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:43:54,077 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:54,079 INFO L256 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-02-08 08:43:54,080 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:43:54,122 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:43:54,122 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:43:54,162 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:43:54,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828225449] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:43:54,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:43:54,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2025-02-08 08:43:54,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899649341] [2025-02-08 08:43:54,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:43:54,163 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-08 08:43:54,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:43:54,163 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-08 08:43:54,163 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2025-02-08 08:43:54,204 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 86 [2025-02-08 08:43:54,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 102 transitions, 771 flow. Second operand has 12 states, 12 states have (on average 37.583333333333336) internal successors, (451), 12 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:43:54,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:43:54,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 86 [2025-02-08 08:43:54,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:43:54,570 INFO L124 PetriNetUnfolderBase]: 2976/4535 cut-off events. [2025-02-08 08:43:54,570 INFO L125 PetriNetUnfolderBase]: For 978/1097 co-relation queries the response was YES. [2025-02-08 08:43:54,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9819 conditions, 4535 events. 2976/4535 cut-off events. For 978/1097 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 25196 event pairs, 2156 based on Foata normal form. 0/3522 useless extension candidates. Maximal degree in co-relation 9563. Up to 3138 conditions per place. [2025-02-08 08:43:54,584 INFO L140 encePairwiseOnDemand]: 73/86 looper letters, 82 selfloop transitions, 44 changer transitions 0/139 dead transitions. [2025-02-08 08:43:54,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 139 transitions, 1121 flow [2025-02-08 08:43:54,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-08 08:43:54,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-08 08:43:54,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 418 transitions. [2025-02-08 08:43:54,586 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5400516795865633 [2025-02-08 08:43:54,586 INFO L175 Difference]: Start difference. First operand has 101 places, 102 transitions, 771 flow. Second operand 9 states and 418 transitions. [2025-02-08 08:43:54,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 139 transitions, 1121 flow [2025-02-08 08:43:54,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 139 transitions, 1040 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-02-08 08:43:54,589 INFO L231 Difference]: Finished difference. Result has 105 places, 104 transitions, 795 flow [2025-02-08 08:43:54,589 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=690, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=795, PETRI_PLACES=105, PETRI_TRANSITIONS=104} [2025-02-08 08:43:54,589 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 21 predicate places. [2025-02-08 08:43:54,589 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 104 transitions, 795 flow [2025-02-08 08:43:54,590 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 37.583333333333336) internal successors, (451), 12 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:43:54,590 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:43:54,590 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] [2025-02-08 08:43:54,596 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-02-08 08:43:54,790 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:43:54,790 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread3Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2025-02-08 08:43:54,791 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:43:54,791 INFO L85 PathProgramCache]: Analyzing trace with hash -432409891, now seen corresponding path program 1 times [2025-02-08 08:43:54,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:43:54,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233325559] [2025-02-08 08:43:54,791 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:43:54,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:43:54,797 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-02-08 08:43:54,801 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-02-08 08:43:54,801 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:43:54,801 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:54,833 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:43:54,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:43:54,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233325559] [2025-02-08 08:43:54,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233325559] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:43:54,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:43:54,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-08 08:43:54,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030078513] [2025-02-08 08:43:54,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:43:54,834 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:43:54,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:43:54,835 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:43:54,835 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:43:54,865 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 86 [2025-02-08 08:43:54,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 104 transitions, 795 flow. Second operand has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:43:54,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:43:54,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 86 [2025-02-08 08:43:54,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:43:55,063 INFO L124 PetriNetUnfolderBase]: 2392/3807 cut-off events. [2025-02-08 08:43:55,064 INFO L125 PetriNetUnfolderBase]: For 1552/1634 co-relation queries the response was YES. [2025-02-08 08:43:55,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8969 conditions, 3807 events. 2392/3807 cut-off events. For 1552/1634 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 21384 event pairs, 1951 based on Foata normal form. 0/3101 useless extension candidates. Maximal degree in co-relation 8710. Up to 3358 conditions per place. [2025-02-08 08:43:55,078 INFO L140 encePairwiseOnDemand]: 83/86 looper letters, 81 selfloop transitions, 8 changer transitions 0/103 dead transitions. [2025-02-08 08:43:55,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 103 transitions, 971 flow [2025-02-08 08:43:55,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 08:43:55,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 08:43:55,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 176 transitions. [2025-02-08 08:43:55,079 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5116279069767442 [2025-02-08 08:43:55,079 INFO L175 Difference]: Start difference. First operand has 105 places, 104 transitions, 795 flow. Second operand 4 states and 176 transitions. [2025-02-08 08:43:55,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 103 transitions, 971 flow [2025-02-08 08:43:55,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 103 transitions, 890 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-02-08 08:43:55,083 INFO L231 Difference]: Finished difference. Result has 101 places, 103 transitions, 728 flow [2025-02-08 08:43:55,083 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=712, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=728, PETRI_PLACES=101, PETRI_TRANSITIONS=103} [2025-02-08 08:43:55,084 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 17 predicate places. [2025-02-08 08:43:55,084 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 103 transitions, 728 flow [2025-02-08 08:43:55,084 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:43:55,084 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:43:55,084 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] [2025-02-08 08:43:55,084 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2025-02-08 08:43:55,084 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2025-02-08 08:43:55,084 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:43:55,084 INFO L85 PathProgramCache]: Analyzing trace with hash -432409890, now seen corresponding path program 1 times [2025-02-08 08:43:55,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:43:55,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732116165] [2025-02-08 08:43:55,085 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:43:55,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:43:55,090 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-02-08 08:43:55,094 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-02-08 08:43:55,094 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:43:55,094 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:55,147 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:43:55,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:43:55,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732116165] [2025-02-08 08:43:55,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732116165] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:43:55,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752742771] [2025-02-08 08:43:55,147 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:43:55,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:43:55,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:43:55,153 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:43:55,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-02-08 08:43:55,202 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-02-08 08:43:55,222 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-02-08 08:43:55,222 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:43:55,222 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:55,224 INFO L256 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-02-08 08:43:55,225 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:43:55,264 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:43:55,264 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:43:55,305 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:43:55,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752742771] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:43:55,306 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:43:55,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2025-02-08 08:43:55,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190370271] [2025-02-08 08:43:55,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:43:55,306 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-08 08:43:55,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:43:55,307 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-08 08:43:55,307 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2025-02-08 08:43:55,353 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 86 [2025-02-08 08:43:55,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 103 transitions, 728 flow. Second operand has 12 states, 12 states have (on average 37.833333333333336) internal successors, (454), 12 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:43:55,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:43:55,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 86 [2025-02-08 08:43:55,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:43:55,639 INFO L124 PetriNetUnfolderBase]: 2169/3350 cut-off events. [2025-02-08 08:43:55,639 INFO L125 PetriNetUnfolderBase]: For 1082/1277 co-relation queries the response was YES. [2025-02-08 08:43:55,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7664 conditions, 3350 events. 2169/3350 cut-off events. For 1082/1277 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 18044 event pairs, 1338 based on Foata normal form. 0/2630 useless extension candidates. Maximal degree in co-relation 7426. Up to 2262 conditions per place. [2025-02-08 08:43:55,650 INFO L140 encePairwiseOnDemand]: 73/86 looper letters, 87 selfloop transitions, 44 changer transitions 0/144 dead transitions. [2025-02-08 08:43:55,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 144 transitions, 1114 flow [2025-02-08 08:43:55,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-08 08:43:55,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-08 08:43:55,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 458 transitions. [2025-02-08 08:43:55,652 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5325581395348837 [2025-02-08 08:43:55,652 INFO L175 Difference]: Start difference. First operand has 101 places, 103 transitions, 728 flow. Second operand 10 states and 458 transitions. [2025-02-08 08:43:55,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 144 transitions, 1114 flow [2025-02-08 08:43:55,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 144 transitions, 1105 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:43:55,656 INFO L231 Difference]: Finished difference. Result has 111 places, 105 transitions, 853 flow [2025-02-08 08:43:55,656 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=719, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=853, PETRI_PLACES=111, PETRI_TRANSITIONS=105} [2025-02-08 08:43:55,656 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 27 predicate places. [2025-02-08 08:43:55,656 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 105 transitions, 853 flow [2025-02-08 08:43:55,656 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 37.833333333333336) internal successors, (454), 12 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:43:55,656 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:43:55,656 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:43:55,662 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-02-08 08:43:55,859 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-02-08 08:43:55,859 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2025-02-08 08:43:55,859 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:43:55,859 INFO L85 PathProgramCache]: Analyzing trace with hash 649851989, now seen corresponding path program 2 times [2025-02-08 08:43:55,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:43:55,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886638321] [2025-02-08 08:43:55,859 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:43:55,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:43:55,866 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-02-08 08:43:55,874 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 12 of 24 statements. [2025-02-08 08:43:55,874 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-08 08:43:55,874 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:56,145 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-08 08:43:56,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:43:56,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886638321] [2025-02-08 08:43:56,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886638321] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:43:56,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:43:56,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-02-08 08:43:56,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467777059] [2025-02-08 08:43:56,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:43:56,146 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-08 08:43:56,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:43:56,147 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-08 08:43:56,147 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2025-02-08 08:43:56,362 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 86 [2025-02-08 08:43:56,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 105 transitions, 853 flow. Second operand has 8 states, 8 states have (on average 31.25) internal successors, (250), 8 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:43:56,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:43:56,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 86 [2025-02-08 08:43:56,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:43:56,951 INFO L124 PetriNetUnfolderBase]: 4690/7313 cut-off events. [2025-02-08 08:43:56,952 INFO L125 PetriNetUnfolderBase]: For 1904/2178 co-relation queries the response was YES. [2025-02-08 08:43:56,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16706 conditions, 7313 events. 4690/7313 cut-off events. For 1904/2178 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 42666 event pairs, 1908 based on Foata normal form. 0/5552 useless extension candidates. Maximal degree in co-relation 16429. Up to 4070 conditions per place. [2025-02-08 08:43:56,976 INFO L140 encePairwiseOnDemand]: 77/86 looper letters, 125 selfloop transitions, 17 changer transitions 0/151 dead transitions. [2025-02-08 08:43:56,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 151 transitions, 1269 flow [2025-02-08 08:43:56,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-08 08:43:56,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-08 08:43:56,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 295 transitions. [2025-02-08 08:43:56,977 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4900332225913621 [2025-02-08 08:43:56,977 INFO L175 Difference]: Start difference. First operand has 111 places, 105 transitions, 853 flow. Second operand 7 states and 295 transitions. [2025-02-08 08:43:56,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 151 transitions, 1269 flow [2025-02-08 08:43:56,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 151 transitions, 1218 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-02-08 08:43:56,982 INFO L231 Difference]: Finished difference. Result has 114 places, 108 transitions, 863 flow [2025-02-08 08:43:56,982 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=802, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=863, PETRI_PLACES=114, PETRI_TRANSITIONS=108} [2025-02-08 08:43:56,982 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 30 predicate places. [2025-02-08 08:43:56,982 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 108 transitions, 863 flow [2025-02-08 08:43:56,983 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 31.25) internal successors, (250), 8 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:43:56,983 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:43:56,983 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:43:56,983 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2025-02-08 08:43:56,983 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2025-02-08 08:43:56,983 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:43:56,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1716719266, now seen corresponding path program 2 times [2025-02-08 08:43:56,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:43:56,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034652105] [2025-02-08 08:43:56,984 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:43:56,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:43:56,989 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-02-08 08:43:56,998 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 14 of 26 statements. [2025-02-08 08:43:56,998 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-08 08:43:56,998 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:57,176 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-08 08:43:57,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:43:57,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034652105] [2025-02-08 08:43:57,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034652105] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:43:57,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:43:57,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-02-08 08:43:57,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578409769] [2025-02-08 08:43:57,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:43:57,178 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-08 08:43:57,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:43:57,178 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-08 08:43:57,178 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2025-02-08 08:43:57,414 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 86 [2025-02-08 08:43:57,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 108 transitions, 863 flow. Second operand has 8 states, 8 states have (on average 26.5) internal successors, (212), 8 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:43:57,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:43:57,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 86 [2025-02-08 08:43:57,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:43:57,901 INFO L124 PetriNetUnfolderBase]: 3803/5747 cut-off events. [2025-02-08 08:43:57,902 INFO L125 PetriNetUnfolderBase]: For 3084/3384 co-relation queries the response was YES. [2025-02-08 08:43:57,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14428 conditions, 5747 events. 3803/5747 cut-off events. For 3084/3384 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 30269 event pairs, 900 based on Foata normal form. 88/4759 useless extension candidates. Maximal degree in co-relation 14156. Up to 2497 conditions per place. [2025-02-08 08:43:57,932 INFO L140 encePairwiseOnDemand]: 79/86 looper letters, 127 selfloop transitions, 16 changer transitions 0/155 dead transitions. [2025-02-08 08:43:57,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 155 transitions, 1315 flow [2025-02-08 08:43:57,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-08 08:43:57,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-08 08:43:57,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 254 transitions. [2025-02-08 08:43:57,933 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4219269102990033 [2025-02-08 08:43:57,934 INFO L175 Difference]: Start difference. First operand has 114 places, 108 transitions, 863 flow. Second operand 7 states and 254 transitions. [2025-02-08 08:43:57,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 155 transitions, 1315 flow [2025-02-08 08:43:57,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 155 transitions, 1272 flow, removed 4 selfloop flow, removed 4 redundant places. [2025-02-08 08:43:57,941 INFO L231 Difference]: Finished difference. Result has 115 places, 107 transitions, 862 flow [2025-02-08 08:43:57,941 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=830, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=862, PETRI_PLACES=115, PETRI_TRANSITIONS=107} [2025-02-08 08:43:57,942 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 31 predicate places. [2025-02-08 08:43:57,942 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 107 transitions, 862 flow [2025-02-08 08:43:57,942 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 26.5) internal successors, (212), 8 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:43:57,942 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:43:57,942 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:43:57,942 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2025-02-08 08:43:57,942 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2025-02-08 08:43:57,943 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:43:57,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1716719268, now seen corresponding path program 1 times [2025-02-08 08:43:57,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:43:57,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776081474] [2025-02-08 08:43:57,943 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:43:57,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:43:57,949 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-02-08 08:43:57,956 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-02-08 08:43:57,956 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:43:57,956 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:58,174 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-08 08:43:58,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:43:58,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776081474] [2025-02-08 08:43:58,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776081474] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:43:58,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550642943] [2025-02-08 08:43:58,174 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:43:58,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:43:58,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:43:58,181 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:43:58,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-02-08 08:43:58,238 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-02-08 08:43:58,261 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-02-08 08:43:58,261 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:43:58,261 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:58,262 INFO L256 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-08 08:43:58,264 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:43:58,279 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 [2025-02-08 08:43:58,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-08 08:43:58,371 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 [2025-02-08 08:43:58,381 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-08 08:43:58,381 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 [2025-02-08 08:43:58,444 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-02-08 08:43:58,444 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:43:58,550 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 33 treesize of output 29 [2025-02-08 08:43:58,607 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-02-08 08:43:58,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550642943] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:43:58,607 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:43:58,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 21 [2025-02-08 08:43:58,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908853669] [2025-02-08 08:43:58,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:43:58,608 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-02-08 08:43:58,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:43:58,609 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-02-08 08:43:58,609 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2025-02-08 08:43:59,701 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 86 [2025-02-08 08:43:59,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 107 transitions, 862 flow. Second operand has 22 states, 22 states have (on average 31.818181818181817) internal successors, (700), 22 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:43:59,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:43:59,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 86 [2025-02-08 08:43:59,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:44:00,525 INFO L124 PetriNetUnfolderBase]: 2502/3812 cut-off events. [2025-02-08 08:44:00,525 INFO L125 PetriNetUnfolderBase]: For 2589/2743 co-relation queries the response was YES. [2025-02-08 08:44:00,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10240 conditions, 3812 events. 2502/3812 cut-off events. For 2589/2743 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 19414 event pairs, 465 based on Foata normal form. 86/3482 useless extension candidates. Maximal degree in co-relation 9968. Up to 2591 conditions per place. [2025-02-08 08:44:00,540 INFO L140 encePairwiseOnDemand]: 75/86 looper letters, 96 selfloop transitions, 28 changer transitions 11/148 dead transitions. [2025-02-08 08:44:00,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 148 transitions, 1285 flow [2025-02-08 08:44:00,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-02-08 08:44:00,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-02-08 08:44:00,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 535 transitions. [2025-02-08 08:44:00,541 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41472868217054265 [2025-02-08 08:44:00,541 INFO L175 Difference]: Start difference. First operand has 115 places, 107 transitions, 862 flow. Second operand 15 states and 535 transitions. [2025-02-08 08:44:00,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 148 transitions, 1285 flow [2025-02-08 08:44:00,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 148 transitions, 1254 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-02-08 08:44:00,547 INFO L231 Difference]: Finished difference. Result has 125 places, 103 transitions, 849 flow [2025-02-08 08:44:00,547 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=825, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=849, PETRI_PLACES=125, PETRI_TRANSITIONS=103} [2025-02-08 08:44:00,547 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 41 predicate places. [2025-02-08 08:44:00,547 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 103 transitions, 849 flow [2025-02-08 08:44:00,548 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 31.818181818181817) internal successors, (700), 22 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:44:00,548 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:44:00,548 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:44:00,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-02-08 08:44:00,748 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:44:00,749 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2025-02-08 08:44:00,749 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:44:00,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1737526393, now seen corresponding path program 1 times [2025-02-08 08:44:00,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:44:00,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292688310] [2025-02-08 08:44:00,749 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:44:00,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:44:00,756 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-02-08 08:44:00,763 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-02-08 08:44:00,764 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:44:00,764 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:44:00,988 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-08 08:44:00,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:44:00,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292688310] [2025-02-08 08:44:00,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292688310] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:44:00,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325791326] [2025-02-08 08:44:00,989 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:44:00,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:44:00,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:44:00,991 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:44:00,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-02-08 08:44:01,044 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-02-08 08:44:01,068 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-02-08 08:44:01,068 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:44:01,069 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:44:01,070 INFO L256 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 37 conjuncts are in the unsatisfiable core [2025-02-08 08:44:01,073 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:44:01,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2025-02-08 08:44:01,131 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2025-02-08 08:44:01,131 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2025-02-08 08:44:01,434 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-08 08:44:01,434 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:44:01,622 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-02-08 08:44:01,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325791326] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-08 08:44:01,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-08 08:44:01,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 8] total 21 [2025-02-08 08:44:01,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819412056] [2025-02-08 08:44:01,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:44:01,623 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-08 08:44:01,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:44:01,623 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-08 08:44:01,623 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2025-02-08 08:44:01,864 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 86 [2025-02-08 08:44:01,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 103 transitions, 849 flow. Second operand has 8 states, 8 states have (on average 35.375) internal successors, (283), 8 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) [2025-02-08 08:44:01,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:44:01,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 86 [2025-02-08 08:44:01,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:44:02,274 INFO L124 PetriNetUnfolderBase]: 1904/2966 cut-off events. [2025-02-08 08:44:02,274 INFO L125 PetriNetUnfolderBase]: For 2584/2634 co-relation queries the response was YES. [2025-02-08 08:44:02,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8037 conditions, 2966 events. 1904/2966 cut-off events. For 2584/2634 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14734 event pairs, 670 based on Foata normal form. 3/2576 useless extension candidates. Maximal degree in co-relation 7771. Up to 1467 conditions per place. [2025-02-08 08:44:02,288 INFO L140 encePairwiseOnDemand]: 75/86 looper letters, 95 selfloop transitions, 22 changer transitions 0/129 dead transitions. [2025-02-08 08:44:02,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 129 transitions, 1152 flow [2025-02-08 08:44:02,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-08 08:44:02,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-08 08:44:02,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 380 transitions. [2025-02-08 08:44:02,290 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4909560723514212 [2025-02-08 08:44:02,290 INFO L175 Difference]: Start difference. First operand has 125 places, 103 transitions, 849 flow. Second operand 9 states and 380 transitions. [2025-02-08 08:44:02,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 129 transitions, 1152 flow [2025-02-08 08:44:02,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 129 transitions, 1118 flow, removed 4 selfloop flow, removed 7 redundant places. [2025-02-08 08:44:02,296 INFO L231 Difference]: Finished difference. Result has 128 places, 104 transitions, 887 flow [2025-02-08 08:44:02,297 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=817, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=887, PETRI_PLACES=128, PETRI_TRANSITIONS=104} [2025-02-08 08:44:02,297 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 44 predicate places. [2025-02-08 08:44:02,297 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 104 transitions, 887 flow [2025-02-08 08:44:02,297 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 35.375) internal successors, (283), 8 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) [2025-02-08 08:44:02,297 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:44:02,297 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:44:02,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-02-08 08:44:02,498 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:44:02,498 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2025-02-08 08:44:02,499 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:44:02,499 INFO L85 PathProgramCache]: Analyzing trace with hash -178173326, now seen corresponding path program 2 times [2025-02-08 08:44:02,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:44:02,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431033808] [2025-02-08 08:44:02,499 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:44:02,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:44:02,505 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 30 statements into 2 equivalence classes. [2025-02-08 08:44:02,510 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 18 of 30 statements. [2025-02-08 08:44:02,511 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-08 08:44:02,511 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:44:02,570 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-08 08:44:02,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:44:02,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431033808] [2025-02-08 08:44:02,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431033808] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:44:02,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:44:02,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-08 08:44:02,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818579028] [2025-02-08 08:44:02,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:44:02,571 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:44:02,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:44:02,572 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:44:02,572 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-08 08:44:02,578 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 86 [2025-02-08 08:44:02,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 104 transitions, 887 flow. Second operand has 5 states, 5 states have (on average 38.4) internal successors, (192), 5 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:44:02,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:44:02,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 86 [2025-02-08 08:44:02,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:44:02,789 INFO L124 PetriNetUnfolderBase]: 1083/1909 cut-off events. [2025-02-08 08:44:02,789 INFO L125 PetriNetUnfolderBase]: For 1741/1805 co-relation queries the response was YES. [2025-02-08 08:44:02,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5323 conditions, 1909 events. 1083/1909 cut-off events. For 1741/1805 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 9748 event pairs, 263 based on Foata normal form. 101/1874 useless extension candidates. Maximal degree in co-relation 5049. Up to 731 conditions per place. [2025-02-08 08:44:02,797 INFO L140 encePairwiseOnDemand]: 81/86 looper letters, 106 selfloop transitions, 9 changer transitions 7/135 dead transitions. [2025-02-08 08:44:02,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 135 transitions, 1278 flow [2025-02-08 08:44:02,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:44:02,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:44:02,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 238 transitions. [2025-02-08 08:44:02,798 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5534883720930233 [2025-02-08 08:44:02,798 INFO L175 Difference]: Start difference. First operand has 128 places, 104 transitions, 887 flow. Second operand 5 states and 238 transitions. [2025-02-08 08:44:02,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 135 transitions, 1278 flow [2025-02-08 08:44:02,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 135 transitions, 1237 flow, removed 3 selfloop flow, removed 6 redundant places. [2025-02-08 08:44:02,803 INFO L231 Difference]: Finished difference. Result has 123 places, 98 transitions, 848 flow [2025-02-08 08:44:02,803 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=844, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=848, PETRI_PLACES=123, PETRI_TRANSITIONS=98} [2025-02-08 08:44:02,804 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 39 predicate places. [2025-02-08 08:44:02,804 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 98 transitions, 848 flow [2025-02-08 08:44:02,804 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.4) internal successors, (192), 5 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:44:02,804 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:44:02,804 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:44:02,804 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2025-02-08 08:44:02,804 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2025-02-08 08:44:02,805 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:44:02,805 INFO L85 PathProgramCache]: Analyzing trace with hash -597208577, now seen corresponding path program 1 times [2025-02-08 08:44:02,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:44:02,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877080200] [2025-02-08 08:44:02,805 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:44:02,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:44:02,810 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-02-08 08:44:02,819 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-02-08 08:44:02,819 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:44:02,819 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:44:02,889 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-02-08 08:44:02,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:44:02,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877080200] [2025-02-08 08:44:02,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877080200] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:44:02,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027935785] [2025-02-08 08:44:02,890 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:44:02,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:44:02,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:44:02,892 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:44:02,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-02-08 08:44:02,948 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-02-08 08:44:02,969 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-02-08 08:44:02,970 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:44:02,970 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:44:02,971 INFO L256 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-02-08 08:44:02,972 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:44:03,047 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-02-08 08:44:03,047 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:44:03,116 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-02-08 08:44:03,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027935785] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:44:03,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:44:03,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2025-02-08 08:44:03,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157188880] [2025-02-08 08:44:03,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:44:03,117 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-08 08:44:03,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:44:03,117 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-08 08:44:03,117 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2025-02-08 08:44:03,259 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 86 [2025-02-08 08:44:03,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 98 transitions, 848 flow. Second operand has 17 states, 17 states have (on average 37.64705882352941) internal successors, (640), 17 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:44:03,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:44:03,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 86 [2025-02-08 08:44:03,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:44:03,761 INFO L124 PetriNetUnfolderBase]: 1563/2741 cut-off events. [2025-02-08 08:44:03,761 INFO L125 PetriNetUnfolderBase]: For 2244/2244 co-relation queries the response was YES. [2025-02-08 08:44:03,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7765 conditions, 2741 events. 1563/2741 cut-off events. For 2244/2244 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 14516 event pairs, 829 based on Foata normal form. 32/2581 useless extension candidates. Maximal degree in co-relation 5831. Up to 1310 conditions per place. [2025-02-08 08:44:03,772 INFO L140 encePairwiseOnDemand]: 72/86 looper letters, 63 selfloop transitions, 25 changer transitions 59/159 dead transitions. [2025-02-08 08:44:03,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 159 transitions, 1488 flow [2025-02-08 08:44:03,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-02-08 08:44:03,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-02-08 08:44:03,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 653 transitions. [2025-02-08 08:44:03,773 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.506201550387597 [2025-02-08 08:44:03,773 INFO L175 Difference]: Start difference. First operand has 123 places, 98 transitions, 848 flow. Second operand 15 states and 653 transitions. [2025-02-08 08:44:03,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 159 transitions, 1488 flow [2025-02-08 08:44:03,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 159 transitions, 1446 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-02-08 08:44:03,780 INFO L231 Difference]: Finished difference. Result has 138 places, 81 transitions, 667 flow [2025-02-08 08:44:03,780 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=826, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=667, PETRI_PLACES=138, PETRI_TRANSITIONS=81} [2025-02-08 08:44:03,780 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 54 predicate places. [2025-02-08 08:44:03,780 INFO L471 AbstractCegarLoop]: Abstraction has has 138 places, 81 transitions, 667 flow [2025-02-08 08:44:03,781 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 37.64705882352941) internal successors, (640), 17 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:44:03,781 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:44:03,781 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] [2025-02-08 08:44:03,787 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-02-08 08:44:03,981 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:44:03,982 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2025-02-08 08:44:03,982 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:44:03,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1316809008, now seen corresponding path program 1 times [2025-02-08 08:44:03,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:44:03,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725444256] [2025-02-08 08:44:03,982 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:44:03,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:44:03,988 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-02-08 08:44:03,992 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-02-08 08:44:03,993 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:44:03,993 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:44:04,055 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 08:44:04,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:44:04,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725444256] [2025-02-08 08:44:04,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725444256] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:44:04,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:44:04,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-02-08 08:44:04,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691470376] [2025-02-08 08:44:04,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:44:04,056 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-08 08:44:04,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:44:04,056 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-08 08:44:04,056 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-02-08 08:44:04,134 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 86 [2025-02-08 08:44:04,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 81 transitions, 667 flow. Second operand has 6 states, 6 states have (on average 40.0) internal successors, (240), 6 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:44:04,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:44:04,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 86 [2025-02-08 08:44:04,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:44:04,452 INFO L124 PetriNetUnfolderBase]: 1902/3555 cut-off events. [2025-02-08 08:44:04,453 INFO L125 PetriNetUnfolderBase]: For 2372/2372 co-relation queries the response was YES. [2025-02-08 08:44:04,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9274 conditions, 3555 events. 1902/3555 cut-off events. For 2372/2372 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 23127 event pairs, 731 based on Foata normal form. 1/3256 useless extension candidates. Maximal degree in co-relation 8279. Up to 1208 conditions per place. [2025-02-08 08:44:04,472 INFO L140 encePairwiseOnDemand]: 78/86 looper letters, 80 selfloop transitions, 8 changer transitions 15/115 dead transitions. [2025-02-08 08:44:04,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 115 transitions, 983 flow [2025-02-08 08:44:04,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-08 08:44:04,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-08 08:44:04,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 318 transitions. [2025-02-08 08:44:04,474 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5282392026578073 [2025-02-08 08:44:04,474 INFO L175 Difference]: Start difference. First operand has 138 places, 81 transitions, 667 flow. Second operand 7 states and 318 transitions. [2025-02-08 08:44:04,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 115 transitions, 983 flow [2025-02-08 08:44:04,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 115 transitions, 890 flow, removed 16 selfloop flow, removed 19 redundant places. [2025-02-08 08:44:04,481 INFO L231 Difference]: Finished difference. Result has 118 places, 67 transitions, 496 flow [2025-02-08 08:44:04,481 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=574, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=496, PETRI_PLACES=118, PETRI_TRANSITIONS=67} [2025-02-08 08:44:04,481 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 34 predicate places. [2025-02-08 08:44:04,481 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 67 transitions, 496 flow [2025-02-08 08:44:04,482 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 40.0) internal successors, (240), 6 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:44:04,482 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:44:04,482 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:44:04,482 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2025-02-08 08:44:04,482 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2025-02-08 08:44:04,482 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:44:04,482 INFO L85 PathProgramCache]: Analyzing trace with hash 512297875, now seen corresponding path program 2 times [2025-02-08 08:44:04,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:44:04,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624202459] [2025-02-08 08:44:04,483 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:44:04,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:44:04,490 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 36 statements into 2 equivalence classes. [2025-02-08 08:44:04,512 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 36 of 36 statements. [2025-02-08 08:44:04,514 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:44:04,514 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:44:04,763 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-02-08 08:44:04,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:44:04,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624202459] [2025-02-08 08:44:04,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624202459] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:44:04,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007434339] [2025-02-08 08:44:04,764 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:44:04,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:44:04,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:44:04,772 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:44:04,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-02-08 08:44:04,832 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 36 statements into 2 equivalence classes. [2025-02-08 08:44:04,870 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 36 of 36 statements. [2025-02-08 08:44:04,871 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:44:04,871 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:44:04,872 INFO L256 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-02-08 08:44:04,874 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:44:04,879 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 [2025-02-08 08:44:04,882 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 [2025-02-08 08:44:04,964 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-02-08 08:44:04,964 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2025-02-08 08:44:04,980 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2025-02-08 08:44:04,981 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 [2025-02-08 08:44:05,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-08 08:44:05,049 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 16 treesize of output 11 [2025-02-08 08:44:05,061 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2025-02-08 08:44:05,061 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 [2025-02-08 08:44:05,161 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-02-08 08:44:05,162 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:44:05,731 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-02-08 08:44:05,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007434339] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:44:05,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:44:05,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 23 [2025-02-08 08:44:05,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989535771] [2025-02-08 08:44:05,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:44:05,733 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-02-08 08:44:05,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:44:05,734 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-02-08 08:44:05,734 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2025-02-08 08:44:07,166 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 86 [2025-02-08 08:44:07,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 67 transitions, 496 flow. Second operand has 25 states, 25 states have (on average 22.12) internal successors, (553), 25 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:44:07,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:44:07,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 86 [2025-02-08 08:44:07,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:44:08,222 INFO L124 PetriNetUnfolderBase]: 3679/5932 cut-off events. [2025-02-08 08:44:08,222 INFO L125 PetriNetUnfolderBase]: For 2046/2046 co-relation queries the response was YES. [2025-02-08 08:44:08,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15530 conditions, 5932 events. 3679/5932 cut-off events. For 2046/2046 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 34717 event pairs, 189 based on Foata normal form. 384/5832 useless extension candidates. Maximal degree in co-relation 15436. Up to 2082 conditions per place. [2025-02-08 08:44:08,245 INFO L140 encePairwiseOnDemand]: 74/86 looper letters, 100 selfloop transitions, 18 changer transitions 0/125 dead transitions. [2025-02-08 08:44:08,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 125 transitions, 907 flow [2025-02-08 08:44:08,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-02-08 08:44:08,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-02-08 08:44:08,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 400 transitions. [2025-02-08 08:44:08,246 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.31007751937984496 [2025-02-08 08:44:08,246 INFO L175 Difference]: Start difference. First operand has 118 places, 67 transitions, 496 flow. Second operand 15 states and 400 transitions. [2025-02-08 08:44:08,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 125 transitions, 907 flow [2025-02-08 08:44:08,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 125 transitions, 824 flow, removed 10 selfloop flow, removed 18 redundant places. [2025-02-08 08:44:08,250 INFO L231 Difference]: Finished difference. Result has 99 places, 67 transitions, 473 flow [2025-02-08 08:44:08,250 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=421, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=473, PETRI_PLACES=99, PETRI_TRANSITIONS=67} [2025-02-08 08:44:08,251 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 15 predicate places. [2025-02-08 08:44:08,251 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 67 transitions, 473 flow [2025-02-08 08:44:08,251 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 22.12) internal successors, (553), 25 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:44:08,251 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:44:08,251 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:44:08,257 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-02-08 08:44:08,455 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2025-02-08 08:44:08,455 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2025-02-08 08:44:08,455 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:44:08,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1602958281, now seen corresponding path program 1 times [2025-02-08 08:44:08,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:44:08,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693133080] [2025-02-08 08:44:08,455 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:44:08,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:44:08,462 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-02-08 08:44:08,469 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-02-08 08:44:08,469 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:44:08,469 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:44:08,735 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-02-08 08:44:08,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:44:08,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693133080] [2025-02-08 08:44:08,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693133080] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:44:08,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657152491] [2025-02-08 08:44:08,735 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:44:08,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:44:08,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:44:08,737 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:44:08,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-02-08 08:44:08,792 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-02-08 08:44:08,821 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-02-08 08:44:08,822 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:44:08,822 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:44:08,823 INFO L256 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 42 conjuncts are in the unsatisfiable core [2025-02-08 08:44:08,824 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:44:08,850 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 [2025-02-08 08:44:08,853 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 [2025-02-08 08:44:08,922 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-02-08 08:44:08,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 28 [2025-02-08 08:44:08,940 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-08 08:44:08,940 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 [2025-02-08 08:44:09,367 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-08 08:44:09,368 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:44:09,721 INFO L173 IndexEqualityManager]: detected equality via solver [2025-02-08 08:44:09,726 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-02-08 08:44:09,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657152491] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:44:09,726 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:44:09,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 30 [2025-02-08 08:44:09,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261602908] [2025-02-08 08:44:09,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:44:09,727 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-02-08 08:44:09,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:44:09,728 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-02-08 08:44:09,728 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=803, Unknown=0, NotChecked=0, Total=930 [2025-02-08 08:44:11,832 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 86 [2025-02-08 08:44:11,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 67 transitions, 473 flow. Second operand has 31 states, 31 states have (on average 26.774193548387096) internal successors, (830), 31 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:44:11,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:44:11,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 86 [2025-02-08 08:44:11,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:44:13,132 INFO L124 PetriNetUnfolderBase]: 3869/5944 cut-off events. [2025-02-08 08:44:13,132 INFO L125 PetriNetUnfolderBase]: For 2383/2383 co-relation queries the response was YES. [2025-02-08 08:44:13,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15550 conditions, 5944 events. 3869/5944 cut-off events. For 2383/2383 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 33001 event pairs, 897 based on Foata normal form. 96/5529 useless extension candidates. Maximal degree in co-relation 15467. Up to 2082 conditions per place. [2025-02-08 08:44:13,164 INFO L140 encePairwiseOnDemand]: 74/86 looper letters, 91 selfloop transitions, 17 changer transitions 0/116 dead transitions. [2025-02-08 08:44:13,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 116 transitions, 825 flow [2025-02-08 08:44:13,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-02-08 08:44:13,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2025-02-08 08:44:13,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 507 transitions. [2025-02-08 08:44:13,165 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.34678522571819426 [2025-02-08 08:44:13,165 INFO L175 Difference]: Start difference. First operand has 99 places, 67 transitions, 473 flow. Second operand 17 states and 507 transitions. [2025-02-08 08:44:13,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 116 transitions, 825 flow [2025-02-08 08:44:13,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 116 transitions, 792 flow, removed 3 selfloop flow, removed 11 redundant places. [2025-02-08 08:44:13,175 INFO L231 Difference]: Finished difference. Result has 106 places, 68 transitions, 490 flow [2025-02-08 08:44:13,175 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=440, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=490, PETRI_PLACES=106, PETRI_TRANSITIONS=68} [2025-02-08 08:44:13,175 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 22 predicate places. [2025-02-08 08:44:13,175 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 68 transitions, 490 flow [2025-02-08 08:44:13,176 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 26.774193548387096) internal successors, (830), 31 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:44:13,176 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:44:13,176 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:44:13,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-02-08 08:44:13,376 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2025-02-08 08:44:13,377 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2025-02-08 08:44:13,377 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:44:13,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1228153057, now seen corresponding path program 2 times [2025-02-08 08:44:13,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:44:13,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304963841] [2025-02-08 08:44:13,377 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:44:13,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:44:13,384 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 44 statements into 2 equivalence classes. [2025-02-08 08:44:13,391 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 44 of 44 statements. [2025-02-08 08:44:13,391 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:44:13,391 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:44:13,490 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-02-08 08:44:13,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:44:13,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304963841] [2025-02-08 08:44:13,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304963841] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:44:13,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722129982] [2025-02-08 08:44:13,491 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:44:13,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:44:13,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:44:13,493 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:44:13,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-02-08 08:44:13,556 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 44 statements into 2 equivalence classes. [2025-02-08 08:44:13,583 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 44 of 44 statements. [2025-02-08 08:44:13,583 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:44:13,583 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:44:13,586 INFO L256 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-02-08 08:44:13,587 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:44:13,807 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-02-08 08:44:13,808 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:44:13,913 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-02-08 08:44:13,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722129982] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:44:13,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:44:13,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2025-02-08 08:44:13,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193305682] [2025-02-08 08:44:13,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:44:13,915 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-02-08 08:44:13,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:44:13,915 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-02-08 08:44:13,916 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=332, Unknown=0, NotChecked=0, Total=462 [2025-02-08 08:44:14,136 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 86 [2025-02-08 08:44:14,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 68 transitions, 490 flow. Second operand has 22 states, 22 states have (on average 37.72727272727273) internal successors, (830), 22 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:44:14,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:44:14,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 86 [2025-02-08 08:44:14,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:44:14,920 INFO L124 PetriNetUnfolderBase]: 5352/8827 cut-off events. [2025-02-08 08:44:14,920 INFO L125 PetriNetUnfolderBase]: For 6732/6732 co-relation queries the response was YES. [2025-02-08 08:44:14,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23697 conditions, 8827 events. 5352/8827 cut-off events. For 6732/6732 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 55850 event pairs, 2996 based on Foata normal form. 96/8151 useless extension candidates. Maximal degree in co-relation 14343. Up to 4722 conditions per place. [2025-02-08 08:44:14,954 INFO L140 encePairwiseOnDemand]: 73/86 looper letters, 43 selfloop transitions, 21 changer transitions 92/166 dead transitions. [2025-02-08 08:44:14,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 166 transitions, 1434 flow [2025-02-08 08:44:14,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-02-08 08:44:14,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2025-02-08 08:44:14,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 776 transitions. [2025-02-08 08:44:14,956 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5012919896640827 [2025-02-08 08:44:14,956 INFO L175 Difference]: Start difference. First operand has 106 places, 68 transitions, 490 flow. Second operand 18 states and 776 transitions. [2025-02-08 08:44:14,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 166 transitions, 1434 flow [2025-02-08 08:44:14,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 166 transitions, 1384 flow, removed 0 selfloop flow, removed 14 redundant places. [2025-02-08 08:44:14,969 INFO L231 Difference]: Finished difference. Result has 117 places, 74 transitions, 633 flow [2025-02-08 08:44:14,970 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=463, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=633, PETRI_PLACES=117, PETRI_TRANSITIONS=74} [2025-02-08 08:44:14,971 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 33 predicate places. [2025-02-08 08:44:14,972 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 74 transitions, 633 flow [2025-02-08 08:44:14,972 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 37.72727272727273) internal successors, (830), 22 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:44:14,972 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:44:14,972 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:44:14,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-02-08 08:44:15,176 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:44:15,176 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2025-02-08 08:44:15,176 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:44:15,176 INFO L85 PathProgramCache]: Analyzing trace with hash -612579211, now seen corresponding path program 3 times [2025-02-08 08:44:15,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:44:15,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574967892] [2025-02-08 08:44:15,176 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 08:44:15,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:44:15,184 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 50 statements into 6 equivalence classes. [2025-02-08 08:44:15,193 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 20 of 50 statements. [2025-02-08 08:44:15,193 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-08 08:44:15,193 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:44:15,404 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2025-02-08 08:44:15,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:44:15,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574967892] [2025-02-08 08:44:15,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574967892] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:44:15,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045139870] [2025-02-08 08:44:15,405 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 08:44:15,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:44:15,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:44:15,407 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:44:15,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-02-08 08:44:15,471 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 50 statements into 6 equivalence classes. [2025-02-08 08:44:15,495 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 20 of 50 statements. [2025-02-08 08:44:15,495 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-08 08:44:15,495 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:44:15,496 INFO L256 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 38 conjuncts are in the unsatisfiable core [2025-02-08 08:44:15,497 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:44:15,501 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 [2025-02-08 08:44:15,503 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 [2025-02-08 08:44:15,566 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2025-02-08 08:44:15,567 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 [2025-02-08 08:44:15,580 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 27 treesize of output 20 [2025-02-08 08:44:15,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-08 08:44:15,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-08 08:44:15,721 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2025-02-08 08:44:15,737 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2025-02-08 08:44:15,737 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 [2025-02-08 08:44:16,047 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2025-02-08 08:44:16,047 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:44:17,078 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2025-02-08 08:44:17,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045139870] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:44:17,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:44:17,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 14 [2025-02-08 08:44:17,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005115445] [2025-02-08 08:44:17,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:44:17,079 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-02-08 08:44:17,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:44:17,079 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-02-08 08:44:17,079 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2025-02-08 08:44:18,197 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 86 [2025-02-08 08:44:18,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 74 transitions, 633 flow. Second operand has 16 states, 16 states have (on average 24.5625) internal successors, (393), 16 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:44:18,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:44:18,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 86 [2025-02-08 08:44:18,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:44:19,052 INFO L124 PetriNetUnfolderBase]: 4095/6154 cut-off events. [2025-02-08 08:44:19,052 INFO L125 PetriNetUnfolderBase]: For 3963/3963 co-relation queries the response was YES. [2025-02-08 08:44:19,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16866 conditions, 6154 events. 4095/6154 cut-off events. For 3963/3963 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 34645 event pairs, 561 based on Foata normal form. 96/5749 useless extension candidates. Maximal degree in co-relation 16750. Up to 4646 conditions per place. [2025-02-08 08:44:19,074 INFO L140 encePairwiseOnDemand]: 78/86 looper letters, 0 selfloop transitions, 0 changer transitions 93/93 dead transitions. [2025-02-08 08:44:19,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 93 transitions, 853 flow [2025-02-08 08:44:19,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-08 08:44:19,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-08 08:44:19,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 216 transitions. [2025-02-08 08:44:19,079 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.313953488372093 [2025-02-08 08:44:19,079 INFO L175 Difference]: Start difference. First operand has 117 places, 74 transitions, 633 flow. Second operand 8 states and 216 transitions. [2025-02-08 08:44:19,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 93 transitions, 853 flow [2025-02-08 08:44:19,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 93 transitions, 807 flow, removed 10 selfloop flow, removed 11 redundant places. [2025-02-08 08:44:19,102 INFO L231 Difference]: Finished difference. Result has 101 places, 0 transitions, 0 flow [2025-02-08 08:44:19,102 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=581, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=0, PETRI_PLACES=101, PETRI_TRANSITIONS=0} [2025-02-08 08:44:19,106 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 17 predicate places. [2025-02-08 08:44:19,106 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 0 transitions, 0 flow [2025-02-08 08:44:19,106 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 24.5625) internal successors, (393), 16 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:44:19,111 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 51 remaining) [2025-02-08 08:44:19,111 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 51 remaining) [2025-02-08 08:44:19,111 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 51 remaining) [2025-02-08 08:44:19,111 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 51 remaining) [2025-02-08 08:44:19,111 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 51 remaining) [2025-02-08 08:44:19,111 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 51 remaining) [2025-02-08 08:44:19,111 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 51 remaining) [2025-02-08 08:44:19,111 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 51 remaining) [2025-02-08 08:44:19,111 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 51 remaining) [2025-02-08 08:44:19,111 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 51 remaining) [2025-02-08 08:44:19,112 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 51 remaining) [2025-02-08 08:44:19,112 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 51 remaining) [2025-02-08 08:44:19,112 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread3Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 51 remaining) [2025-02-08 08:44:19,112 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 51 remaining) [2025-02-08 08:44:19,112 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 51 remaining) [2025-02-08 08:44:19,112 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 51 remaining) [2025-02-08 08:44:19,112 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 51 remaining) [2025-02-08 08:44:19,112 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 51 remaining) [2025-02-08 08:44:19,112 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 51 remaining) [2025-02-08 08:44:19,112 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 51 remaining) [2025-02-08 08:44:19,112 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 51 remaining) [2025-02-08 08:44:19,112 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 51 remaining) [2025-02-08 08:44:19,112 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 51 remaining) [2025-02-08 08:44:19,113 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 51 remaining) [2025-02-08 08:44:19,113 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 51 remaining) [2025-02-08 08:44:19,113 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 51 remaining) [2025-02-08 08:44:19,116 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 51 remaining) [2025-02-08 08:44:19,116 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 51 remaining) [2025-02-08 08:44:19,116 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 51 remaining) [2025-02-08 08:44:19,117 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 51 remaining) [2025-02-08 08:44:19,117 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK (20 of 51 remaining) [2025-02-08 08:44:19,117 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (19 of 51 remaining) [2025-02-08 08:44:19,117 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (18 of 51 remaining) [2025-02-08 08:44:19,117 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (17 of 51 remaining) [2025-02-08 08:44:19,117 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (16 of 51 remaining) [2025-02-08 08:44:19,117 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 51 remaining) [2025-02-08 08:44:19,117 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 51 remaining) [2025-02-08 08:44:19,117 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 51 remaining) [2025-02-08 08:44:19,117 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 51 remaining) [2025-02-08 08:44:19,117 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 51 remaining) [2025-02-08 08:44:19,117 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 51 remaining) [2025-02-08 08:44:19,117 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 51 remaining) [2025-02-08 08:44:19,117 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 51 remaining) [2025-02-08 08:44:19,117 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 51 remaining) [2025-02-08 08:44:19,117 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 51 remaining) [2025-02-08 08:44:19,118 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 51 remaining) [2025-02-08 08:44:19,118 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 51 remaining) [2025-02-08 08:44:19,118 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread3Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 51 remaining) [2025-02-08 08:44:19,118 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 51 remaining) [2025-02-08 08:44:19,118 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 51 remaining) [2025-02-08 08:44:19,118 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 51 remaining) [2025-02-08 08:44:19,126 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-02-08 08:44:19,322 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2025-02-08 08:44:19,322 INFO L422 BasicCegarLoop]: Path program histogram: [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:44:19,326 INFO L241 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-02-08 08:44:19,326 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-02-08 08:44:19,329 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.02 08:44:19 BasicIcfg [2025-02-08 08:44:19,329 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-02-08 08:44:19,330 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-02-08 08:44:19,330 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-02-08 08:44:19,330 INFO L274 PluginConnector]: Witness Printer initialized [2025-02-08 08:44:19,331 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 08:43:32" (3/4) ... [2025-02-08 08:44:19,332 INFO L146 WitnessPrinter]: Generating witness for correct program [2025-02-08 08:44:19,334 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure thread1 [2025-02-08 08:44:19,334 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure thread2 [2025-02-08 08:44:19,334 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure thread3 [2025-02-08 08:44:19,343 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 158 nodes and edges [2025-02-08 08:44:19,343 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 70 nodes and edges [2025-02-08 08:44:19,344 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 27 nodes and edges [2025-02-08 08:44:19,344 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2025-02-08 08:44:19,426 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/witness.graphml [2025-02-08 08:44:19,426 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/witness.yml [2025-02-08 08:44:19,426 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-02-08 08:44:19,428 INFO L158 Benchmark]: Toolchain (without parser) took 48195.39ms. Allocated memory was 142.6MB in the beginning and 1.5GB in the end (delta: 1.4GB). Free memory was 107.2MB in the beginning and 628.1MB in the end (delta: -520.9MB). Peak memory consumption was 832.9MB. Max. memory is 16.1GB. [2025-02-08 08:44:19,428 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 201.3MB. Free memory is still 128.5MB. There was no memory consumed. Max. memory is 16.1GB. [2025-02-08 08:44:19,429 INFO L158 Benchmark]: CACSL2BoogieTranslator took 210.92ms. Allocated memory is still 142.6MB. Free memory was 107.2MB in the beginning and 94.4MB in the end (delta: 12.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-02-08 08:44:19,429 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.14ms. Allocated memory is still 142.6MB. Free memory was 94.4MB in the beginning and 92.8MB in the end (delta: 1.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-02-08 08:44:19,429 INFO L158 Benchmark]: Boogie Preprocessor took 53.95ms. Allocated memory is still 142.6MB. Free memory was 92.8MB in the beginning and 90.3MB in the end (delta: 2.5MB). There was no memory consumed. Max. memory is 16.1GB. [2025-02-08 08:44:19,430 INFO L158 Benchmark]: IcfgBuilder took 755.02ms. Allocated memory is still 142.6MB. Free memory was 90.3MB in the beginning and 80.8MB in the end (delta: 9.5MB). Peak memory consumption was 64.8MB. Max. memory is 16.1GB. [2025-02-08 08:44:19,430 INFO L158 Benchmark]: TraceAbstraction took 47040.25ms. Allocated memory was 142.6MB in the beginning and 1.5GB in the end (delta: 1.4GB). Free memory was 80.0MB in the beginning and 636.7MB in the end (delta: -556.7MB). Peak memory consumption was 801.6MB. Max. memory is 16.1GB. [2025-02-08 08:44:19,430 INFO L158 Benchmark]: Witness Printer took 96.39ms. Allocated memory is still 1.5GB. Free memory was 636.7MB in the beginning and 628.1MB in the end (delta: 8.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-02-08 08:44:19,432 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 201.3MB. Free memory is still 128.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 210.92ms. Allocated memory is still 142.6MB. Free memory was 107.2MB in the beginning and 94.4MB in the end (delta: 12.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 34.14ms. Allocated memory is still 142.6MB. Free memory was 94.4MB in the beginning and 92.8MB in the end (delta: 1.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 53.95ms. Allocated memory is still 142.6MB. Free memory was 92.8MB in the beginning and 90.3MB in the end (delta: 2.5MB). There was no memory consumed. Max. memory is 16.1GB. * IcfgBuilder took 755.02ms. Allocated memory is still 142.6MB. Free memory was 90.3MB in the beginning and 80.8MB in the end (delta: 9.5MB). Peak memory consumption was 64.8MB. Max. memory is 16.1GB. * TraceAbstraction took 47040.25ms. Allocated memory was 142.6MB in the beginning and 1.5GB in the end (delta: 1.4GB). Free memory was 80.0MB in the beginning and 636.7MB in the end (delta: -556.7MB). Peak memory consumption was 801.6MB. Max. memory is 16.1GB. * Witness Printer took 96.39ms. Allocated memory is still 1.5GB. Free memory was 636.7MB in the beginning and 628.1MB in the end (delta: 8.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 21]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 90]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 121 locations, 51 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 46.9s, OverallIterations: 28, TraceHistogramMax: 4, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 30.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 3 mSolverCounterUnknown, 7534 SdHoareTripleChecker+Valid, 18.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 6703 mSDsluCounter, 4504 SdHoareTripleChecker+Invalid, 16.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 4424 mSDsCounter, 626 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 28095 IncrementalHoareTripleChecker+Invalid, 28724 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 626 mSolverCounterUnsat, 80 mSDtfsCounter, 28095 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 986 GetRequests, 586 SyntacticMatches, 7 SemanticMatches, 393 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1670 ImplicationChecksByTransitivity, 5.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=887occurred in iteration=21, InterpolantAutomatonStates: 231, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 10.9s InterpolantComputationTime, 931 NumberOfCodeBlocks, 823 NumberOfCodeBlocksAsserted, 55 NumberOfCheckSat, 1247 ConstructedInterpolants, 96 QuantifiedInterpolants, 19600 SizeOfPredicates, 95 NumberOfNonLiveVariables, 3519 ConjunctsInSsa, 344 ConjunctsInUnsatCore, 62 InterpolantComputations, 14 PerfectInterpolantSequences, 603/784 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 34 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2025-02-08 08:44:19,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE