./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-three-array-min.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-min.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 632917bb2a5e88c193ba7761220e89039206b92cb89d98172ae8e9ad69d27ca8 --- Real Ultimate output --- This is Ultimate 0.3.0-?-48c9605-m [2025-02-08 08:43:43,888 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-08 08:43:43,965 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-02-08 08:43:43,970 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-08 08:43:43,970 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-08 08:43:43,998 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-08 08:43:43,999 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-08 08:43:44,000 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-08 08:43:44,000 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-08 08:43:44,000 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-08 08:43:44,001 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-08 08:43:44,001 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-08 08:43:44,001 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-08 08:43:44,002 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-08 08:43:44,002 INFO L153 SettingsManager]: * Use SBE=true [2025-02-08 08:43:44,002 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-08 08:43:44,002 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-08 08:43:44,003 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-08 08:43:44,003 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-08 08:43:44,003 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-08 08:43:44,003 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-02-08 08:43:44,003 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-02-08 08:43:44,003 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-02-08 08:43:44,003 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-08 08:43:44,003 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-02-08 08:43:44,003 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-08 08:43:44,004 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-08 08:43:44,004 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-08 08:43:44,004 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-08 08:43:44,004 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-08 08:43:44,004 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-08 08:43:44,004 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-08 08:43:44,005 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-08 08:43:44,005 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 08:43:44,005 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-08 08:43:44,005 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-08 08:43:44,005 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-08 08:43:44,005 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-08 08:43:44,005 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-08 08:43:44,005 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-08 08:43:44,006 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-08 08:43:44,006 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-08 08:43:44,006 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 -> 632917bb2a5e88c193ba7761220e89039206b92cb89d98172ae8e9ad69d27ca8 [2025-02-08 08:43:44,292 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-08 08:43:44,300 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-08 08:43:44,303 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-08 08:43:44,304 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-08 08:43:44,305 INFO L274 PluginConnector]: CDTParser initialized [2025-02-08 08:43:44,306 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-three-array-min.wvr.c [2025-02-08 08:43:45,606 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/9f3704470/1eaf58727c4d40eeafa2c7a23f9d9476/FLAGa32e47d71 [2025-02-08 08:43:45,831 INFO L384 CDTParser]: Found 1 translation units. [2025-02-08 08:43:45,831 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/popl20-three-array-min.wvr.c [2025-02-08 08:43:45,839 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/9f3704470/1eaf58727c4d40eeafa2c7a23f9d9476/FLAGa32e47d71 [2025-02-08 08:43:45,854 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/9f3704470/1eaf58727c4d40eeafa2c7a23f9d9476 [2025-02-08 08:43:45,856 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-08 08:43:45,857 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-08 08:43:45,858 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-08 08:43:45,858 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-08 08:43:45,861 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-08 08:43:45,862 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 08:43:45" (1/1) ... [2025-02-08 08:43:45,863 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ace9b1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:43:45, skipping insertion in model container [2025-02-08 08:43:45,863 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 08:43:45" (1/1) ... [2025-02-08 08:43:45,876 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-08 08:43:46,017 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 08:43:46,019 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 08:43:46,028 INFO L200 MainTranslator]: Completed pre-run [2025-02-08 08:43:46,047 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 08:43:46,071 INFO L204 MainTranslator]: Completed translation [2025-02-08 08:43:46,071 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:43:46 WrapperNode [2025-02-08 08:43:46,072 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-08 08:43:46,073 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-08 08:43:46,073 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-08 08:43:46,074 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-08 08:43:46,078 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:43:46" (1/1) ... [2025-02-08 08:43:46,084 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:43:46" (1/1) ... [2025-02-08 08:43:46,104 INFO L138 Inliner]: procedures = 25, calls = 43, calls flagged for inlining = 15, calls inlined = 23, statements flattened = 212 [2025-02-08 08:43:46,104 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-08 08:43:46,105 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-08 08:43:46,105 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-08 08:43:46,105 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-08 08:43:46,112 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:43:46" (1/1) ... [2025-02-08 08:43:46,112 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:43:46" (1/1) ... [2025-02-08 08:43:46,115 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:43:46" (1/1) ... [2025-02-08 08:43:46,140 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 08:43:46,140 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:43:46" (1/1) ... [2025-02-08 08:43:46,140 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:43:46" (1/1) ... [2025-02-08 08:43:46,151 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:43:46" (1/1) ... [2025-02-08 08:43:46,152 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:43:46" (1/1) ... [2025-02-08 08:43:46,155 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:43:46" (1/1) ... [2025-02-08 08:43:46,158 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:43:46" (1/1) ... [2025-02-08 08:43:46,160 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-08 08:43:46,161 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-08 08:43:46,161 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-08 08:43:46,161 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-08 08:43:46,162 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:43:46" (1/1) ... [2025-02-08 08:43:46,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 08:43:46,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:43:46,186 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 08:43:46,188 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 08:43:46,204 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-08 08:43:46,204 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-02-08 08:43:46,204 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-02-08 08:43:46,204 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-02-08 08:43:46,204 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-02-08 08:43:46,204 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-02-08 08:43:46,204 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-02-08 08:43:46,205 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-08 08:43:46,205 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-08 08:43:46,205 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-08 08:43:46,205 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-08 08:43:46,205 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-02-08 08:43:46,205 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-02-08 08:43:46,205 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-08 08:43:46,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-08 08:43:46,205 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-08 08:43:46,205 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-08 08:43:46,205 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-08 08:43:46,206 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 08:43:46,315 INFO L257 CfgBuilder]: Building ICFG [2025-02-08 08:43:46,317 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-08 08:43:46,520 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L64: ~p~0 := 1 + ~i~1#1; [2025-02-08 08:43:46,523 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L65: [2025-02-08 08:43:46,524 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L61-1: havoc #t~post9#1; [2025-02-08 08:43:46,524 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L61-2: ~i~1#1 := 1 + #t~post9#1; [2025-02-08 08:43:46,524 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L61-3: #t~post9#1 := ~i~1#1; [2025-02-08 08:43:46,524 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L63: havoc #t~ret8#1; [2025-02-08 08:43:46,524 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L63-1: havoc #t~mem7#1; [2025-02-08 08:43:46,524 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L63-2: havoc #t~mem6#1; [2025-02-08 08:43:46,524 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 08:43:46,525 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L63-3: assume !(1 == #valid[~C~0.base]); [2025-02-08 08:43:46,525 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 08:43:46,525 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 08:43:46,525 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L63-5: havoc plus_#in~a#1, plus_#in~b#1; [2025-02-08 08:43:46,525 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L63-6: havoc plus_~a#1, plus_~b#1; [2025-02-08 08:43:46,525 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L63-7: #t~ret8#1 := plus_#res#1; [2025-02-08 08:43:46,840 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-08 08:43:46,840 INFO L308 CfgBuilder]: Performing block encoding [2025-02-08 08:43:47,125 WARN L149 AtomicBlockAnalyzer]: Unexpected successor node of atomic block begin: L133 is not an error location. [2025-02-08 08:43:47,127 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-08 08:43:47,128 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-08 08:43:47,128 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 08:43:47 BoogieIcfgContainer [2025-02-08 08:43:47,128 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-08 08:43:47,131 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-08 08:43:47,131 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-08 08:43:47,135 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-08 08:43:47,136 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.02 08:43:45" (1/3) ... [2025-02-08 08:43:47,136 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b60957 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 08:43:47, skipping insertion in model container [2025-02-08 08:43:47,137 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:43:46" (2/3) ... [2025-02-08 08:43:47,137 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b60957 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 08:43:47, skipping insertion in model container [2025-02-08 08:43:47,137 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 08:43:47" (3/3) ... [2025-02-08 08:43:47,138 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-three-array-min.wvr.c [2025-02-08 08:43:47,156 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-08 08:43:47,157 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-three-array-min.wvr.c that has 4 procedures, 79 locations, 1 initial locations, 6 loop locations, and 34 error locations. [2025-02-08 08:43:47,158 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-08 08:43:47,236 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2025-02-08 08:43:47,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 88 places, 86 transitions, 193 flow [2025-02-08 08:43:47,304 INFO L124 PetriNetUnfolderBase]: 8/83 cut-off events. [2025-02-08 08:43:47,306 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-02-08 08:43:47,313 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 08:43:47,313 INFO L82 GeneralOperation]: Start removeDead. Operand has 88 places, 86 transitions, 193 flow [2025-02-08 08:43:47,317 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 84 places, 82 transitions, 182 flow [2025-02-08 08:43:47,328 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-08 08:43:47,343 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;@c4e6131, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-08 08:43:47,343 INFO L334 AbstractCegarLoop]: Starting to check reachability of 51 error locations. [2025-02-08 08:43:47,346 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-08 08:43:47,347 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-02-08 08:43:47,347 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-08 08:43:47,347 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:43:47,348 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-08 08:43:47,348 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 08:43:47,352 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:43:47,353 INFO L85 PathProgramCache]: Analyzing trace with hash 775973, now seen corresponding path program 1 times [2025-02-08 08:43:47,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:43:47,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5731606] [2025-02-08 08:43:47,361 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:43:47,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:43:47,429 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-08 08:43:47,456 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-08 08:43:47,457 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:43:47,457 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:47,623 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 08:43:47,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:43:47,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5731606] [2025-02-08 08:43:47,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5731606] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:43:47,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:43:47,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-02-08 08:43:47,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602386974] [2025-02-08 08:43:47,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:43:47,635 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-08 08:43:47,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:43:47,660 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-08 08:43:47,661 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-08 08:43:47,713 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 86 [2025-02-08 08:43:47,716 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 08:43:47,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:43:47,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 86 [2025-02-08 08:43:47,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:43:48,326 INFO L124 PetriNetUnfolderBase]: 2654/3903 cut-off events. [2025-02-08 08:43:48,326 INFO L125 PetriNetUnfolderBase]: For 115/115 co-relation queries the response was YES. [2025-02-08 08:43:48,336 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 08:43:48,360 INFO L140 encePairwiseOnDemand]: 78/86 looper letters, 44 selfloop transitions, 2 changer transitions 0/75 dead transitions. [2025-02-08 08:43:48,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 75 transitions, 260 flow [2025-02-08 08:43:48,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-08 08:43:48,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-08 08:43:48,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 151 transitions. [2025-02-08 08:43:48,371 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5852713178294574 [2025-02-08 08:43:48,372 INFO L175 Difference]: Start difference. First operand has 84 places, 82 transitions, 182 flow. Second operand 3 states and 151 transitions. [2025-02-08 08:43:48,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 75 transitions, 260 flow [2025-02-08 08:43:48,380 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 08:43:48,385 INFO L231 Difference]: Finished difference. Result has 73 places, 75 transitions, 160 flow [2025-02-08 08:43:48,387 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 08:43:48,390 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -11 predicate places. [2025-02-08 08:43:48,392 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 75 transitions, 160 flow [2025-02-08 08:43:48,392 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 08:43:48,392 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:43:48,392 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-08 08:43:48,392 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-08 08:43:48,392 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 08:43:48,393 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:43:48,393 INFO L85 PathProgramCache]: Analyzing trace with hash 775974, now seen corresponding path program 1 times [2025-02-08 08:43:48,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:43:48,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151398300] [2025-02-08 08:43:48,394 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:43:48,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:43:48,408 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-08 08:43:48,440 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-08 08:43:48,442 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:43:48,443 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:48,685 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 08:43:48,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:43:48,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151398300] [2025-02-08 08:43:48,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151398300] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:43:48,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:43:48,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-08 08:43:48,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515284093] [2025-02-08 08:43:48,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:43:48,689 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:43:48,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:43:48,689 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:43:48,689 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:43:48,750 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 86 [2025-02-08 08:43:48,751 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 08:43:48,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:43:48,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 86 [2025-02-08 08:43:48,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:43:49,278 INFO L124 PetriNetUnfolderBase]: 2655/3906 cut-off events. [2025-02-08 08:43:49,279 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2025-02-08 08:43:49,286 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 08:43:49,312 INFO L140 encePairwiseOnDemand]: 82/86 looper letters, 49 selfloop transitions, 3 changer transitions 0/78 dead transitions. [2025-02-08 08:43:49,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 78 transitions, 270 flow [2025-02-08 08:43:49,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-08 08:43:49,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-08 08:43:49,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 152 transitions. [2025-02-08 08:43:49,315 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5891472868217055 [2025-02-08 08:43:49,315 INFO L175 Difference]: Start difference. First operand has 73 places, 75 transitions, 160 flow. Second operand 3 states and 152 transitions. [2025-02-08 08:43:49,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 78 transitions, 270 flow [2025-02-08 08:43:49,317 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 08:43:49,318 INFO L231 Difference]: Finished difference. Result has 74 places, 77 transitions, 175 flow [2025-02-08 08:43:49,320 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 08:43:49,321 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -10 predicate places. [2025-02-08 08:43:49,321 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 77 transitions, 175 flow [2025-02-08 08:43:49,321 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 08:43:49,321 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:43:49,321 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2025-02-08 08:43:49,322 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-08 08:43:49,322 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 08:43:49,323 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:43:49,323 INFO L85 PathProgramCache]: Analyzing trace with hash 24056976, now seen corresponding path program 1 times [2025-02-08 08:43:49,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:43:49,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177933713] [2025-02-08 08:43:49,323 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:43:49,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:43:49,338 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-02-08 08:43:49,349 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-02-08 08:43:49,350 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:43:49,350 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:49,453 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 08:43:49,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:43:49,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177933713] [2025-02-08 08:43:49,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177933713] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:43:49,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:43:49,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-08 08:43:49,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87957257] [2025-02-08 08:43:49,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:43:49,455 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-08 08:43:49,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:43:49,456 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-08 08:43:49,456 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-08 08:43:49,464 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 86 [2025-02-08 08:43:49,465 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 08:43:49,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:43:49,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 86 [2025-02-08 08:43:49,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:43:49,858 INFO L124 PetriNetUnfolderBase]: 2654/3905 cut-off events. [2025-02-08 08:43:49,859 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2025-02-08 08:43:49,866 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 08:43:49,890 INFO L140 encePairwiseOnDemand]: 83/86 looper letters, 46 selfloop transitions, 2 changer transitions 0/77 dead transitions. [2025-02-08 08:43:49,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 77 transitions, 268 flow [2025-02-08 08:43:49,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-08 08:43:49,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-08 08:43:49,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 157 transitions. [2025-02-08 08:43:49,894 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6085271317829457 [2025-02-08 08:43:49,894 INFO L175 Difference]: Start difference. First operand has 74 places, 77 transitions, 175 flow. Second operand 3 states and 157 transitions. [2025-02-08 08:43:49,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 77 transitions, 268 flow [2025-02-08 08:43:49,895 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 08:43:49,897 INFO L231 Difference]: Finished difference. Result has 75 places, 76 transitions, 172 flow [2025-02-08 08:43:49,897 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 08:43:49,898 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -9 predicate places. [2025-02-08 08:43:49,898 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 76 transitions, 172 flow [2025-02-08 08:43:49,898 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 08:43:49,899 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:43:49,899 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2025-02-08 08:43:49,899 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-02-08 08:43:49,899 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 08:43:49,900 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:43:49,900 INFO L85 PathProgramCache]: Analyzing trace with hash 745734525, now seen corresponding path program 1 times [2025-02-08 08:43:49,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:43:49,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064857074] [2025-02-08 08:43:49,901 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:43:49,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:43:49,910 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-08 08:43:49,927 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-08 08:43:49,929 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:43:49,929 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:50,271 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 08:43:50,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:43:50,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064857074] [2025-02-08 08:43:50,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064857074] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:43:50,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422274004] [2025-02-08 08:43:50,273 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:43:50,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:43:50,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:43:50,277 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 08:43:50,279 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 08:43:50,340 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-08 08:43:50,353 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-08 08:43:50,354 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:43:50,354 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:50,356 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-02-08 08:43:50,359 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:43:50,430 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 08:43:50,645 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 08:43:50,645 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:43:50,784 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 08:43:50,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422274004] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:43:50,785 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:43:50,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2025-02-08 08:43:50,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27282335] [2025-02-08 08:43:50,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:43:50,785 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-08 08:43:50,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:43:50,786 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-08 08:43:50,786 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2025-02-08 08:43:51,067 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 86 [2025-02-08 08:43:51,067 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 08:43:51,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:43:51,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 86 [2025-02-08 08:43:51,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:43:51,665 INFO L124 PetriNetUnfolderBase]: 2654/3904 cut-off events. [2025-02-08 08:43:51,666 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2025-02-08 08:43:51,673 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 08:43:51,698 INFO L140 encePairwiseOnDemand]: 79/86 looper letters, 43 selfloop transitions, 7 changer transitions 0/76 dead transitions. [2025-02-08 08:43:51,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 76 transitions, 270 flow [2025-02-08 08:43:51,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-08 08:43:51,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-08 08:43:51,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 249 transitions. [2025-02-08 08:43:51,700 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48255813953488375 [2025-02-08 08:43:51,700 INFO L175 Difference]: Start difference. First operand has 75 places, 76 transitions, 172 flow. Second operand 6 states and 249 transitions. [2025-02-08 08:43:51,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 76 transitions, 270 flow [2025-02-08 08:43:51,701 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 08:43:51,702 INFO L231 Difference]: Finished difference. Result has 78 places, 76 transitions, 186 flow [2025-02-08 08:43:51,705 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 08:43:51,705 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -6 predicate places. [2025-02-08 08:43:51,705 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 76 transitions, 186 flow [2025-02-08 08:43:51,706 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 08:43:51,707 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:43:51,707 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-02-08 08:43:51,716 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 08:43:51,907 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 08:43:51,908 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 08:43:51,908 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:43:51,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1642935577, now seen corresponding path program 1 times [2025-02-08 08:43:51,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:43:51,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017412745] [2025-02-08 08:43:51,909 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:43:51,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:43:51,922 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-08 08:43:51,939 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-08 08:43:51,939 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:43:51,939 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:52,166 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 08:43:52,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:43:52,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017412745] [2025-02-08 08:43:52,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017412745] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:43:52,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443654611] [2025-02-08 08:43:52,167 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:43:52,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:43:52,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:43:52,170 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 08:43:52,172 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 08:43:52,224 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-08 08:43:52,239 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-08 08:43:52,239 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:43:52,239 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:52,240 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-02-08 08:43:52,242 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:43:52,259 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 08:43:52,371 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-02-08 08:43:52,372 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 08:43:52,400 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 08:43:52,400 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:43:52,488 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 08:43:52,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443654611] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-08 08:43:52,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-08 08:43:52,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 3] total 9 [2025-02-08 08:43:52,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893889578] [2025-02-08 08:43:52,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:43:52,489 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:43:52,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:43:52,490 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:43:52,490 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2025-02-08 08:43:52,579 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 86 [2025-02-08 08:43:52,580 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 08:43:52,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:43:52,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 86 [2025-02-08 08:43:52,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:43:52,991 INFO L124 PetriNetUnfolderBase]: 2656/3910 cut-off events. [2025-02-08 08:43:52,991 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2025-02-08 08:43:52,997 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 08:43:53,010 INFO L140 encePairwiseOnDemand]: 77/86 looper letters, 49 selfloop transitions, 7 changer transitions 0/82 dead transitions. [2025-02-08 08:43:53,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 82 transitions, 310 flow [2025-02-08 08:43:53,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 08:43:53,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 08:43:53,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 190 transitions. [2025-02-08 08:43:53,012 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5523255813953488 [2025-02-08 08:43:53,012 INFO L175 Difference]: Start difference. First operand has 78 places, 76 transitions, 186 flow. Second operand 4 states and 190 transitions. [2025-02-08 08:43:53,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 82 transitions, 310 flow [2025-02-08 08:43:53,013 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 08:43:53,014 INFO L231 Difference]: Finished difference. Result has 80 places, 80 transitions, 221 flow [2025-02-08 08:43:53,014 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 08:43:53,015 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -4 predicate places. [2025-02-08 08:43:53,015 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 80 transitions, 221 flow [2025-02-08 08:43:53,015 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 08:43:53,016 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:43:53,016 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:43:53,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-02-08 08:43:53,219 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 08:43:53,220 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 08:43:53,220 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:43:53,220 INFO L85 PathProgramCache]: Analyzing trace with hash -608602897, now seen corresponding path program 1 times [2025-02-08 08:43:53,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:43:53,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115931037] [2025-02-08 08:43:53,220 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:43:53,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:43:53,228 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-02-08 08:43:53,236 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-02-08 08:43:53,243 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:43:53,243 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:53,306 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 08:43:53,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:43:53,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115931037] [2025-02-08 08:43:53,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115931037] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:43:53,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:43:53,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-08 08:43:53,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220459040] [2025-02-08 08:43:53,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:43:53,307 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:43:53,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:43:53,308 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:43:53,308 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:43:53,319 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 86 [2025-02-08 08:43:53,320 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 08:43:53,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:43:53,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 86 [2025-02-08 08:43:53,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:43:53,640 INFO L124 PetriNetUnfolderBase]: 2654/3908 cut-off events. [2025-02-08 08:43:53,640 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2025-02-08 08:43:53,648 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 08:43:53,665 INFO L140 encePairwiseOnDemand]: 79/86 looper letters, 46 selfloop transitions, 6 changer transitions 0/80 dead transitions. [2025-02-08 08:43:53,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 80 transitions, 319 flow [2025-02-08 08:43:53,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 08:43:53,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 08:43:53,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 198 transitions. [2025-02-08 08:43:53,667 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5755813953488372 [2025-02-08 08:43:53,667 INFO L175 Difference]: Start difference. First operand has 80 places, 80 transitions, 221 flow. Second operand 4 states and 198 transitions. [2025-02-08 08:43:53,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 80 transitions, 319 flow [2025-02-08 08:43:53,668 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 08:43:53,670 INFO L231 Difference]: Finished difference. Result has 81 places, 78 transitions, 217 flow [2025-02-08 08:43:53,670 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 08:43:53,670 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -3 predicate places. [2025-02-08 08:43:53,671 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 78 transitions, 217 flow [2025-02-08 08:43:53,671 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 08:43:53,671 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:43:53,671 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2025-02-08 08:43:53,671 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-02-08 08:43:53,671 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 08:43:53,672 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:43:53,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1686851143, now seen corresponding path program 1 times [2025-02-08 08:43:53,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:43:53,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654290243] [2025-02-08 08:43:53,672 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:43:53,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:43:53,678 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-08 08:43:53,684 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-08 08:43:53,684 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:43:53,684 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:53,791 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 08:43:53,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:43:53,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654290243] [2025-02-08 08:43:53,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654290243] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:43:53,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226413647] [2025-02-08 08:43:53,792 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:43:53,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:43:53,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:43:53,797 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 08:43:53,800 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 08:43:53,848 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-08 08:43:53,862 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-08 08:43:53,862 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:43:53,862 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:53,863 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-08 08:43:53,864 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:43:53,935 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 08:43:53,935 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:43:53,982 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 08:43:53,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226413647] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:43:53,982 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:43:53,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2025-02-08 08:43:53,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774732068] [2025-02-08 08:43:53,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:43:53,983 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-08 08:43:53,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:43:53,983 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-08 08:43:53,983 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2025-02-08 08:43:54,070 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 86 [2025-02-08 08:43:54,071 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 08:43:54,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:43:54,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 86 [2025-02-08 08:43:54,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:43:54,795 INFO L124 PetriNetUnfolderBase]: 5307/7815 cut-off events. [2025-02-08 08:43:54,796 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2025-02-08 08:43:54,806 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 08:43:54,839 INFO L140 encePairwiseOnDemand]: 76/86 looper letters, 81 selfloop transitions, 22 changer transitions 0/131 dead transitions. [2025-02-08 08:43:54,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 131 transitions, 576 flow [2025-02-08 08:43:54,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-08 08:43:54,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-08 08:43:54,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 393 transitions. [2025-02-08 08:43:54,843 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5712209302325582 [2025-02-08 08:43:54,843 INFO L175 Difference]: Start difference. First operand has 81 places, 78 transitions, 217 flow. Second operand 8 states and 393 transitions. [2025-02-08 08:43:54,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 131 transitions, 576 flow [2025-02-08 08:43:54,845 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 08:43:54,848 INFO L231 Difference]: Finished difference. Result has 87 places, 91 transitions, 334 flow [2025-02-08 08:43:54,848 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 08:43:54,849 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 3 predicate places. [2025-02-08 08:43:54,849 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 91 transitions, 334 flow [2025-02-08 08:43:54,849 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 08:43:54,849 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:43:54,849 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2025-02-08 08:43:54,857 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 08:43:55,050 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 08:43:55,051 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 08:43:55,051 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:43:55,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1466787266, now seen corresponding path program 2 times [2025-02-08 08:43:55,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:43:55,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579213443] [2025-02-08 08:43:55,051 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:43:55,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:43:55,061 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 10 statements into 2 equivalence classes. [2025-02-08 08:43:55,072 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 10 of 10 statements. [2025-02-08 08:43:55,072 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:43:55,072 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:55,288 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 08:43:55,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:43:55,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579213443] [2025-02-08 08:43:55,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579213443] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:43:55,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147471846] [2025-02-08 08:43:55,288 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:43:55,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:43:55,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:43:55,292 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 08:43:55,293 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 08:43:55,341 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 10 statements into 2 equivalence classes. [2025-02-08 08:43:55,360 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 10 of 10 statements. [2025-02-08 08:43:55,360 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:43:55,360 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:55,362 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-02-08 08:43:55,363 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:43:55,374 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 08:43:55,493 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-02-08 08:43:55,493 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 08:43:55,564 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 08:43:55,564 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:43:55,702 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 08:43:55,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147471846] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:43:55,702 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:43:55,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2025-02-08 08:43:55,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665772178] [2025-02-08 08:43:55,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:43:55,703 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-02-08 08:43:55,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:43:55,703 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-02-08 08:43:55,704 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2025-02-08 08:43:56,688 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 86 [2025-02-08 08:43:56,689 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 08:43:56,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:43:56,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 86 [2025-02-08 08:43:56,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:43:58,351 INFO L124 PetriNetUnfolderBase]: 7964/11734 cut-off events. [2025-02-08 08:43:58,351 INFO L125 PetriNetUnfolderBase]: For 71/71 co-relation queries the response was YES. [2025-02-08 08:43:58,369 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 08:43:58,416 INFO L140 encePairwiseOnDemand]: 74/86 looper letters, 94 selfloop transitions, 42 changer transitions 0/162 dead transitions. [2025-02-08 08:43:58,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 162 transitions, 909 flow [2025-02-08 08:43:58,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-02-08 08:43:58,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-02-08 08:43:58,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 641 transitions. [2025-02-08 08:43:58,419 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4968992248062015 [2025-02-08 08:43:58,419 INFO L175 Difference]: Start difference. First operand has 87 places, 91 transitions, 334 flow. Second operand 15 states and 641 transitions. [2025-02-08 08:43:58,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 162 transitions, 909 flow [2025-02-08 08:43:58,421 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 08:43:58,423 INFO L231 Difference]: Finished difference. Result has 106 places, 114 transitions, 612 flow [2025-02-08 08:43:58,423 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 08:43:58,423 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 22 predicate places. [2025-02-08 08:43:58,424 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 114 transitions, 612 flow [2025-02-08 08:43:58,424 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 08:43:58,424 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:43:58,424 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:43:58,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-02-08 08:43:58,629 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 08:43:58,629 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 08:43:58,630 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:43:58,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1863340476, now seen corresponding path program 1 times [2025-02-08 08:43:58,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:43:58,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307891796] [2025-02-08 08:43:58,631 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:43:58,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:43:58,639 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-08 08:43:58,647 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-08 08:43:58,647 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:43:58,647 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:58,824 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 08:43:58,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:43:58,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307891796] [2025-02-08 08:43:58,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307891796] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:43:58,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:43:58,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-08 08:43:58,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605393771] [2025-02-08 08:43:58,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:43:58,825 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:43:58,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:43:58,826 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:43:58,826 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-08 08:43:58,886 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 86 [2025-02-08 08:43:58,887 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 08:43:58,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:43:58,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 86 [2025-02-08 08:43:58,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:43:59,548 INFO L124 PetriNetUnfolderBase]: 7769/11731 cut-off events. [2025-02-08 08:43:59,548 INFO L125 PetriNetUnfolderBase]: For 131/131 co-relation queries the response was YES. [2025-02-08 08:43:59,564 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 08:43:59,606 INFO L140 encePairwiseOnDemand]: 78/86 looper letters, 76 selfloop transitions, 11 changer transitions 0/109 dead transitions. [2025-02-08 08:43:59,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 109 transitions, 776 flow [2025-02-08 08:43:59,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:43:59,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:43:59,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 187 transitions. [2025-02-08 08:43:59,608 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43488372093023253 [2025-02-08 08:43:59,608 INFO L175 Difference]: Start difference. First operand has 106 places, 114 transitions, 612 flow. Second operand 5 states and 187 transitions. [2025-02-08 08:43:59,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 109 transitions, 776 flow [2025-02-08 08:43:59,610 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 08:43:59,612 INFO L231 Difference]: Finished difference. Result has 100 places, 109 transitions, 575 flow [2025-02-08 08:43:59,612 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 08:43:59,613 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 16 predicate places. [2025-02-08 08:43:59,613 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 109 transitions, 575 flow [2025-02-08 08:43:59,613 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 08:43:59,613 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:43:59,613 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:43:59,613 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-02-08 08:43:59,614 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 08:43:59,614 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:43:59,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1863340475, now seen corresponding path program 1 times [2025-02-08 08:43:59,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:43:59,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413940233] [2025-02-08 08:43:59,614 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:43:59,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:43:59,621 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-08 08:43:59,634 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-08 08:43:59,638 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:43:59,639 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:44:00,040 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 08:44:00,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:44:00,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413940233] [2025-02-08 08:44:00,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413940233] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:44:00,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576211621] [2025-02-08 08:44:00,041 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:44:00,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:44:00,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:44:00,043 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 08:44:00,045 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 08:44:00,097 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-08 08:44:00,121 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-08 08:44:00,121 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:44:00,121 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:44:00,123 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-02-08 08:44:00,125 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:44:00,134 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 08:44:00,146 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 08:44:00,200 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-08 08:44:00,201 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 08:44:00,217 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 08:44:00,343 INFO L349 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2025-02-08 08:44:00,344 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 08:44:00,604 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 08:44:00,604 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:44:00,989 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 08:44:00,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576211621] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-08 08:44:00,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-08 08:44:00,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 12 [2025-02-08 08:44:00,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076580451] [2025-02-08 08:44:00,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:44:00,990 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-08 08:44:00,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:44:00,991 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-08 08:44:00,991 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2025-02-08 08:44:02,951 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 08:44:04,235 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-02-08 08:44:04,427 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 86 [2025-02-08 08:44:04,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 109 transitions, 575 flow. Second operand has 6 states, 6 states have (on average 32.833333333333336) internal successors, (197), 6 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:44:04,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:44:04,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 86 [2025-02-08 08:44:04,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:44:06,307 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-02-08 08:44:07,639 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-02-08 08:44:10,517 INFO L124 PetriNetUnfolderBase]: 8606/12763 cut-off events. [2025-02-08 08:44:10,518 INFO L125 PetriNetUnfolderBase]: For 115/115 co-relation queries the response was YES. [2025-02-08 08:44:10,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24941 conditions, 12763 events. 8606/12763 cut-off events. For 115/115 co-relation queries the response was YES. Maximal size of possible extension queue 706. Compared 85969 event pairs, 6918 based on Foata normal form. 0/8803 useless extension candidates. Maximal degree in co-relation 24864. Up to 11680 conditions per place. [2025-02-08 08:44:10,581 INFO L140 encePairwiseOnDemand]: 80/86 looper letters, 75 selfloop transitions, 14 changer transitions 0/108 dead transitions. [2025-02-08 08:44:10,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 108 transitions, 755 flow [2025-02-08 08:44:10,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-08 08:44:10,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-08 08:44:10,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 238 transitions. [2025-02-08 08:44:10,583 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46124031007751937 [2025-02-08 08:44:10,583 INFO L175 Difference]: Start difference. First operand has 100 places, 109 transitions, 575 flow. Second operand 6 states and 238 transitions. [2025-02-08 08:44:10,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 108 transitions, 755 flow [2025-02-08 08:44:10,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 108 transitions, 740 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-08 08:44:10,688 INFO L231 Difference]: Finished difference. Result has 100 places, 107 transitions, 584 flow [2025-02-08 08:44:10,689 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 08:44:10,690 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 16 predicate places. [2025-02-08 08:44:10,690 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 107 transitions, 584 flow [2025-02-08 08:44:10,690 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 32.833333333333336) internal successors, (197), 6 states have internal predecessors, (197), 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 08:44:10,691 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:44:10,691 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:44:10,699 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 08:44:10,891 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 08:44:10,891 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 08:44:10,892 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:44:10,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1928979105, now seen corresponding path program 1 times [2025-02-08 08:44:10,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:44:10,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004243168] [2025-02-08 08:44:10,892 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:44:10,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:44:10,901 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-08 08:44:10,909 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-08 08:44:10,909 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:44:10,909 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:44:10,983 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 08:44:10,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:44:10,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004243168] [2025-02-08 08:44:10,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004243168] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:44:10,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:44:10,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-08 08:44:10,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343499469] [2025-02-08 08:44:10,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:44:10,984 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:44:10,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:44:10,984 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:44:10,984 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-08 08:44:11,060 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 86 [2025-02-08 08:44:11,060 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 08:44:11,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:44:11,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 86 [2025-02-08 08:44:11,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:44:11,735 INFO L124 PetriNetUnfolderBase]: 6677/10069 cut-off events. [2025-02-08 08:44:11,735 INFO L125 PetriNetUnfolderBase]: For 114/114 co-relation queries the response was YES. [2025-02-08 08:44:11,747 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 08:44:11,770 INFO L140 encePairwiseOnDemand]: 78/86 looper letters, 72 selfloop transitions, 13 changer transitions 0/102 dead transitions. [2025-02-08 08:44:11,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 102 transitions, 744 flow [2025-02-08 08:44:11,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:44:11,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:44:11,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 190 transitions. [2025-02-08 08:44:11,772 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2025-02-08 08:44:11,772 INFO L175 Difference]: Start difference. First operand has 100 places, 107 transitions, 584 flow. Second operand 5 states and 190 transitions. [2025-02-08 08:44:11,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 102 transitions, 744 flow [2025-02-08 08:44:11,774 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 08:44:11,776 INFO L231 Difference]: Finished difference. Result has 96 places, 102 transitions, 585 flow [2025-02-08 08:44:11,776 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 08:44:11,776 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 12 predicate places. [2025-02-08 08:44:11,777 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 102 transitions, 585 flow [2025-02-08 08:44:11,777 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 08:44:11,777 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:44:11,777 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:44:11,777 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2025-02-08 08:44:11,777 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 08:44:11,778 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:44:11,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1928979104, now seen corresponding path program 1 times [2025-02-08 08:44:11,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:44:11,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968572680] [2025-02-08 08:44:11,778 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:44:11,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:44:11,784 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-08 08:44:11,791 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-08 08:44:11,792 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:44:11,792 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:44:11,965 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 08:44:11,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:44:11,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968572680] [2025-02-08 08:44:11,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968572680] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:44:11,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265217927] [2025-02-08 08:44:11,966 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:44:11,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:44:11,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:44:11,969 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 08:44:11,971 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 08:44:12,027 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-08 08:44:12,049 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-08 08:44:12,049 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:44:12,049 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:44:12,050 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-08 08:44:12,051 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:44:12,061 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 08:44:12,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-08 08:44:12,104 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 08:44:12,119 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-08 08:44:12,119 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 08:44:12,144 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 08:44:12,145 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:44:12,219 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 08:44:12,283 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 08:44:12,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265217927] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:44:12,284 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:44:12,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2025-02-08 08:44:12,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122814025] [2025-02-08 08:44:12,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:44:12,284 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-08 08:44:12,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:44:12,285 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-08 08:44:12,285 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2025-02-08 08:44:12,795 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 86 [2025-02-08 08:44:12,795 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 08:44:12,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:44:12,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 86 [2025-02-08 08:44:12,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:44:13,401 INFO L124 PetriNetUnfolderBase]: 5900/8746 cut-off events. [2025-02-08 08:44:13,402 INFO L125 PetriNetUnfolderBase]: For 115/115 co-relation queries the response was YES. [2025-02-08 08:44:13,413 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 08:44:13,432 INFO L140 encePairwiseOnDemand]: 77/86 looper letters, 63 selfloop transitions, 23 changer transitions 0/102 dead transitions. [2025-02-08 08:44:13,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 102 transitions, 765 flow [2025-02-08 08:44:13,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-08 08:44:13,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-08 08:44:13,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 300 transitions. [2025-02-08 08:44:13,434 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2025-02-08 08:44:13,434 INFO L175 Difference]: Start difference. First operand has 96 places, 102 transitions, 585 flow. Second operand 8 states and 300 transitions. [2025-02-08 08:44:13,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 102 transitions, 765 flow [2025-02-08 08:44:13,436 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 08:44:13,437 INFO L231 Difference]: Finished difference. Result has 98 places, 100 transitions, 608 flow [2025-02-08 08:44:13,437 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 08:44:13,438 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 14 predicate places. [2025-02-08 08:44:13,438 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 100 transitions, 608 flow [2025-02-08 08:44:13,438 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 08:44:13,438 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:44:13,438 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 1, 1, 1] [2025-02-08 08:44:13,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-02-08 08:44:13,639 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 08:44:13,639 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 08:44:13,639 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:44:13,639 INFO L85 PathProgramCache]: Analyzing trace with hash 447275947, now seen corresponding path program 3 times [2025-02-08 08:44:13,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:44:13,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182967883] [2025-02-08 08:44:13,640 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 08:44:13,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:44:13,648 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 14 statements into 4 equivalence classes. [2025-02-08 08:44:13,664 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 8 of 14 statements. [2025-02-08 08:44:13,665 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-08 08:44:13,665 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:44:13,870 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 08:44:13,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:44:13,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182967883] [2025-02-08 08:44:13,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182967883] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:44:13,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807375271] [2025-02-08 08:44:13,870 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 08:44:13,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:44:13,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:44:13,872 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 08:44:13,874 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 08:44:13,926 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 14 statements into 4 equivalence classes. [2025-02-08 08:44:13,941 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 8 of 14 statements. [2025-02-08 08:44:13,941 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-08 08:44:13,941 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:44:13,943 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-02-08 08:44:13,944 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:44:13,988 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 08:44:14,095 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 08:44:14,096 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:44:14,203 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 08:44:14,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807375271] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:44:14,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:44:14,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2025-02-08 08:44:14,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715619848] [2025-02-08 08:44:14,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:44:14,204 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-02-08 08:44:14,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:44:14,205 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-02-08 08:44:14,206 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2025-02-08 08:44:14,883 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 86 [2025-02-08 08:44:14,883 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 08:44:14,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:44:14,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 86 [2025-02-08 08:44:14,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:44:15,804 INFO L124 PetriNetUnfolderBase]: 5900/8742 cut-off events. [2025-02-08 08:44:15,804 INFO L125 PetriNetUnfolderBase]: For 131/131 co-relation queries the response was YES. [2025-02-08 08:44:15,823 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 08:44:15,848 INFO L140 encePairwiseOnDemand]: 74/86 looper letters, 37 selfloop transitions, 49 changer transitions 0/100 dead transitions. [2025-02-08 08:44:15,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 100 transitions, 766 flow [2025-02-08 08:44:15,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-08 08:44:15,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-08 08:44:15,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 250 transitions. [2025-02-08 08:44:15,850 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4844961240310077 [2025-02-08 08:44:15,850 INFO L175 Difference]: Start difference. First operand has 98 places, 100 transitions, 608 flow. Second operand 6 states and 250 transitions. [2025-02-08 08:44:15,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 100 transitions, 766 flow [2025-02-08 08:44:15,853 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 08:44:15,855 INFO L231 Difference]: Finished difference. Result has 93 places, 100 transitions, 687 flow [2025-02-08 08:44:15,855 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 08:44:15,855 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 9 predicate places. [2025-02-08 08:44:15,855 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 100 transitions, 687 flow [2025-02-08 08:44:15,856 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 08:44:15,856 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:44:15,856 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 08:44:15,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-02-08 08:44:16,059 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 08:44:16,060 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2025-02-08 08:44:16,060 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:44:16,060 INFO L85 PathProgramCache]: Analyzing trace with hash 799432129, now seen corresponding path program 1 times [2025-02-08 08:44:16,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:44:16,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956434223] [2025-02-08 08:44:16,061 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:44:16,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:44:16,069 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-02-08 08:44:16,082 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-02-08 08:44:16,082 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:44:16,082 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:44:16,180 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 08:44:16,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:44:16,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956434223] [2025-02-08 08:44:16,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956434223] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:44:16,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789987882] [2025-02-08 08:44:16,180 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:44:16,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:44:16,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:44:16,183 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 08:44:16,185 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 08:44:16,246 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-02-08 08:44:16,272 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-02-08 08:44:16,272 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:44:16,273 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:44:16,274 INFO L256 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-02-08 08:44:16,275 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:44:16,331 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 08:44:16,331 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:44:16,390 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 08:44:16,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789987882] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:44:16,390 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:44:16,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2025-02-08 08:44:16,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514893317] [2025-02-08 08:44:16,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:44:16,391 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-08 08:44:16,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:44:16,391 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-08 08:44:16,391 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2025-02-08 08:44:16,480 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 86 [2025-02-08 08:44:16,480 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 08:44:16,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:44:16,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 86 [2025-02-08 08:44:16,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:44:16,979 INFO L124 PetriNetUnfolderBase]: 3627/5573 cut-off events. [2025-02-08 08:44:16,979 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2025-02-08 08:44:16,989 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 08:44:17,006 INFO L140 encePairwiseOnDemand]: 73/86 looper letters, 89 selfloop transitions, 44 changer transitions 0/146 dead transitions. [2025-02-08 08:44:17,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 146 transitions, 1065 flow [2025-02-08 08:44:17,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-08 08:44:17,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-08 08:44:17,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 425 transitions. [2025-02-08 08:44:17,007 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5490956072351422 [2025-02-08 08:44:17,008 INFO L175 Difference]: Start difference. First operand has 93 places, 100 transitions, 687 flow. Second operand 9 states and 425 transitions. [2025-02-08 08:44:17,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 146 transitions, 1065 flow [2025-02-08 08:44:17,010 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 08:44:17,012 INFO L231 Difference]: Finished difference. Result has 101 places, 102 transitions, 771 flow [2025-02-08 08:44:17,012 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 08:44:17,012 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 17 predicate places. [2025-02-08 08:44:17,012 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 102 transitions, 771 flow [2025-02-08 08:44:17,013 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 08:44:17,013 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:44:17,013 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:44:17,019 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-02-08 08:44:17,213 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 08:44:17,213 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2025-02-08 08:44:17,214 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:44:17,214 INFO L85 PathProgramCache]: Analyzing trace with hash -565654258, now seen corresponding path program 1 times [2025-02-08 08:44:17,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:44:17,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257587212] [2025-02-08 08:44:17,214 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:44:17,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:44:17,223 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-02-08 08:44:17,231 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-02-08 08:44:17,231 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:44:17,231 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:44:17,325 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 08:44:17,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:44:17,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257587212] [2025-02-08 08:44:17,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257587212] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:44:17,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323221861] [2025-02-08 08:44:17,326 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:44:17,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:44:17,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:44:17,329 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 08:44:17,332 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 08:44:17,397 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-02-08 08:44:17,424 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-02-08 08:44:17,424 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:44:17,425 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:44:17,426 INFO L256 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-02-08 08:44:17,427 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:44:17,488 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 08:44:17,488 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:44:17,552 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 08:44:17,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323221861] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:44:17,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:44:17,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2025-02-08 08:44:17,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166304701] [2025-02-08 08:44:17,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:44:17,553 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-08 08:44:17,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:44:17,554 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-08 08:44:17,554 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2025-02-08 08:44:17,615 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 86 [2025-02-08 08:44:17,616 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 08:44:17,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:44:17,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 86 [2025-02-08 08:44:17,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:44:18,081 INFO L124 PetriNetUnfolderBase]: 2976/4535 cut-off events. [2025-02-08 08:44:18,081 INFO L125 PetriNetUnfolderBase]: For 978/1097 co-relation queries the response was YES. [2025-02-08 08:44:18,088 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 08:44:18,099 INFO L140 encePairwiseOnDemand]: 73/86 looper letters, 82 selfloop transitions, 44 changer transitions 0/139 dead transitions. [2025-02-08 08:44:18,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 139 transitions, 1121 flow [2025-02-08 08:44:18,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-08 08:44:18,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-08 08:44:18,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 418 transitions. [2025-02-08 08:44:18,101 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5400516795865633 [2025-02-08 08:44:18,101 INFO L175 Difference]: Start difference. First operand has 101 places, 102 transitions, 771 flow. Second operand 9 states and 418 transitions. [2025-02-08 08:44:18,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 139 transitions, 1121 flow [2025-02-08 08:44:18,104 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 08:44:18,106 INFO L231 Difference]: Finished difference. Result has 105 places, 104 transitions, 795 flow [2025-02-08 08:44:18,106 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 08:44:18,107 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 21 predicate places. [2025-02-08 08:44:18,107 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 104 transitions, 795 flow [2025-02-08 08:44:18,107 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 08:44:18,107 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:44:18,107 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 08:44:18,114 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 08:44:18,308 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 08:44:18,308 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread3Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2025-02-08 08:44:18,308 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:44:18,308 INFO L85 PathProgramCache]: Analyzing trace with hash -432409891, now seen corresponding path program 1 times [2025-02-08 08:44:18,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:44:18,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560727278] [2025-02-08 08:44:18,309 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:44:18,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:44:18,316 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-02-08 08:44:18,323 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-02-08 08:44:18,324 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:44:18,324 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:44:18,376 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 08:44:18,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:44:18,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560727278] [2025-02-08 08:44:18,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560727278] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:44:18,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:44:18,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-08 08:44:18,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253642322] [2025-02-08 08:44:18,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:44:18,377 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:44:18,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:44:18,378 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:44:18,379 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:44:18,422 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 86 [2025-02-08 08:44:18,422 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 08:44:18,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:44:18,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 86 [2025-02-08 08:44:18,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:44:18,749 INFO L124 PetriNetUnfolderBase]: 2392/3807 cut-off events. [2025-02-08 08:44:18,750 INFO L125 PetriNetUnfolderBase]: For 1552/1634 co-relation queries the response was YES. [2025-02-08 08:44:18,760 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 08:44:18,773 INFO L140 encePairwiseOnDemand]: 83/86 looper letters, 81 selfloop transitions, 8 changer transitions 0/103 dead transitions. [2025-02-08 08:44:18,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 103 transitions, 971 flow [2025-02-08 08:44:18,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 08:44:18,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 08:44:18,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 176 transitions. [2025-02-08 08:44:18,775 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5116279069767442 [2025-02-08 08:44:18,775 INFO L175 Difference]: Start difference. First operand has 105 places, 104 transitions, 795 flow. Second operand 4 states and 176 transitions. [2025-02-08 08:44:18,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 103 transitions, 971 flow [2025-02-08 08:44:18,780 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 08:44:18,782 INFO L231 Difference]: Finished difference. Result has 101 places, 103 transitions, 728 flow [2025-02-08 08:44:18,782 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 08:44:18,783 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 17 predicate places. [2025-02-08 08:44:18,783 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 103 transitions, 728 flow [2025-02-08 08:44:18,783 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 08:44:18,783 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:44:18,784 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 08:44:18,784 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2025-02-08 08:44:18,784 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2025-02-08 08:44:18,784 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:44:18,784 INFO L85 PathProgramCache]: Analyzing trace with hash -432409890, now seen corresponding path program 1 times [2025-02-08 08:44:18,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:44:18,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427058643] [2025-02-08 08:44:18,785 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:44:18,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:44:18,796 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-02-08 08:44:18,807 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-02-08 08:44:18,808 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:44:18,808 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:44:18,890 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 08:44:18,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:44:18,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427058643] [2025-02-08 08:44:18,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427058643] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:44:18,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530906750] [2025-02-08 08:44:18,891 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:44:18,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:44:18,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:44:18,893 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 08:44:18,895 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 08:44:18,964 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-02-08 08:44:18,991 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-02-08 08:44:18,992 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:44:18,992 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:44:18,993 INFO L256 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-02-08 08:44:18,995 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:44:19,056 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 08:44:19,056 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:44:19,112 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 08:44:19,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530906750] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:44:19,113 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:44:19,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2025-02-08 08:44:19,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276475524] [2025-02-08 08:44:19,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:44:19,114 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-08 08:44:19,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:44:19,115 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-08 08:44:19,115 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2025-02-08 08:44:19,162 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 86 [2025-02-08 08:44:19,163 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 08:44:19,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:44:19,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 86 [2025-02-08 08:44:19,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:44:19,485 INFO L124 PetriNetUnfolderBase]: 2169/3350 cut-off events. [2025-02-08 08:44:19,485 INFO L125 PetriNetUnfolderBase]: For 1082/1277 co-relation queries the response was YES. [2025-02-08 08:44:19,490 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 08:44:19,498 INFO L140 encePairwiseOnDemand]: 73/86 looper letters, 87 selfloop transitions, 44 changer transitions 0/144 dead transitions. [2025-02-08 08:44:19,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 144 transitions, 1114 flow [2025-02-08 08:44:19,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-08 08:44:19,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-08 08:44:19,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 458 transitions. [2025-02-08 08:44:19,499 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5325581395348837 [2025-02-08 08:44:19,499 INFO L175 Difference]: Start difference. First operand has 101 places, 103 transitions, 728 flow. Second operand 10 states and 458 transitions. [2025-02-08 08:44:19,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 144 transitions, 1114 flow [2025-02-08 08:44:19,505 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 08:44:19,509 INFO L231 Difference]: Finished difference. Result has 111 places, 105 transitions, 853 flow [2025-02-08 08:44:19,509 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 08:44:19,509 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 27 predicate places. [2025-02-08 08:44:19,509 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 105 transitions, 853 flow [2025-02-08 08:44:19,510 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 08:44:19,510 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:44:19,510 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 08:44:19,518 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 08:44:19,710 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 08:44:19,711 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2025-02-08 08:44:19,711 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:44:19,711 INFO L85 PathProgramCache]: Analyzing trace with hash 649851989, now seen corresponding path program 2 times [2025-02-08 08:44:19,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:44:19,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343085799] [2025-02-08 08:44:19,711 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:44:19,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:44:19,718 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-02-08 08:44:19,732 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 12 of 24 statements. [2025-02-08 08:44:19,732 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-08 08:44:19,732 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:44:19,951 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 08:44:19,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:44:19,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343085799] [2025-02-08 08:44:19,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343085799] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:44:19,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:44:19,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-08 08:44:19,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376035176] [2025-02-08 08:44:19,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:44:19,952 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-08 08:44:19,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:44:19,952 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-08 08:44:19,953 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-02-08 08:44:20,200 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 86 [2025-02-08 08:44:20,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 105 transitions, 853 flow. Second operand has 7 states, 7 states have (on average 31.571428571428573) internal successors, (221), 7 states have internal predecessors, (221), 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 08:44:20,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:44:20,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 86 [2025-02-08 08:44:20,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:44:20,739 INFO L124 PetriNetUnfolderBase]: 4609/7359 cut-off events. [2025-02-08 08:44:20,739 INFO L125 PetriNetUnfolderBase]: For 1865/2136 co-relation queries the response was YES. [2025-02-08 08:44:20,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16718 conditions, 7359 events. 4609/7359 cut-off events. For 1865/2136 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 45281 event pairs, 2330 based on Foata normal form. 0/5549 useless extension candidates. Maximal degree in co-relation 16441. Up to 4014 conditions per place. [2025-02-08 08:44:20,774 INFO L140 encePairwiseOnDemand]: 77/86 looper letters, 125 selfloop transitions, 17 changer transitions 0/151 dead transitions. [2025-02-08 08:44:20,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 151 transitions, 1269 flow [2025-02-08 08:44:20,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-08 08:44:20,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-08 08:44:20,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 295 transitions. [2025-02-08 08:44:20,775 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4900332225913621 [2025-02-08 08:44:20,775 INFO L175 Difference]: Start difference. First operand has 111 places, 105 transitions, 853 flow. Second operand 7 states and 295 transitions. [2025-02-08 08:44:20,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 151 transitions, 1269 flow [2025-02-08 08:44:20,782 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 08:44:20,784 INFO L231 Difference]: Finished difference. Result has 114 places, 108 transitions, 863 flow [2025-02-08 08:44:20,784 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 08:44:20,784 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 30 predicate places. [2025-02-08 08:44:20,784 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 108 transitions, 863 flow [2025-02-08 08:44:20,784 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 31.571428571428573) internal successors, (221), 7 states have internal predecessors, (221), 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 08:44:20,784 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:44:20,785 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 08:44:20,785 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2025-02-08 08:44:20,785 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2025-02-08 08:44:20,785 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:44:20,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1716719266, now seen corresponding path program 2 times [2025-02-08 08:44:20,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:44:20,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672865442] [2025-02-08 08:44:20,785 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:44:20,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:44:20,794 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-02-08 08:44:20,808 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 14 of 26 statements. [2025-02-08 08:44:20,808 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-08 08:44:20,808 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:44:21,068 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 08:44:21,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:44:21,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672865442] [2025-02-08 08:44:21,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672865442] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:44:21,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:44:21,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-02-08 08:44:21,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785375030] [2025-02-08 08:44:21,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:44:21,069 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-08 08:44:21,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:44:21,070 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-08 08:44:21,070 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2025-02-08 08:44:21,375 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 86 [2025-02-08 08:44:21,375 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 08:44:21,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:44:21,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 86 [2025-02-08 08:44:21,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:44:21,903 INFO L124 PetriNetUnfolderBase]: 3774/5731 cut-off events. [2025-02-08 08:44:21,903 INFO L125 PetriNetUnfolderBase]: For 3006/3290 co-relation queries the response was YES. [2025-02-08 08:44:21,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14573 conditions, 5731 events. 3774/5731 cut-off events. For 3006/3290 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 30939 event pairs, 916 based on Foata normal form. 88/4715 useless extension candidates. Maximal degree in co-relation 14301. Up to 2526 conditions per place. [2025-02-08 08:44:21,933 INFO L140 encePairwiseOnDemand]: 79/86 looper letters, 127 selfloop transitions, 16 changer transitions 0/155 dead transitions. [2025-02-08 08:44:21,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 155 transitions, 1315 flow [2025-02-08 08:44:21,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-08 08:44:21,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-08 08:44:21,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 254 transitions. [2025-02-08 08:44:21,935 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4219269102990033 [2025-02-08 08:44:21,935 INFO L175 Difference]: Start difference. First operand has 114 places, 108 transitions, 863 flow. Second operand 7 states and 254 transitions. [2025-02-08 08:44:21,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 155 transitions, 1315 flow [2025-02-08 08:44:21,941 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 08:44:21,943 INFO L231 Difference]: Finished difference. Result has 115 places, 107 transitions, 862 flow [2025-02-08 08:44:21,943 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 08:44:21,943 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 31 predicate places. [2025-02-08 08:44:21,943 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 107 transitions, 862 flow [2025-02-08 08:44:21,943 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 08:44:21,943 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:44:21,944 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 08:44:21,944 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2025-02-08 08:44:21,944 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2025-02-08 08:44:21,944 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:44:21,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1716719268, now seen corresponding path program 1 times [2025-02-08 08:44:21,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:44:21,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672391374] [2025-02-08 08:44:21,944 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:44:21,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:44:21,955 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-02-08 08:44:21,964 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-02-08 08:44:21,964 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:44:21,964 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:44:22,239 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 08:44:22,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:44:22,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672391374] [2025-02-08 08:44:22,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672391374] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:44:22,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992007673] [2025-02-08 08:44:22,240 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:44:22,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:44:22,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:44:22,243 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 08:44:22,245 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 08:44:22,313 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-02-08 08:44:22,343 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-02-08 08:44:22,344 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:44:22,344 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:44:22,346 INFO L256 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-08 08:44:22,347 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:44:22,353 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 08:44:22,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-08 08:44:22,424 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 08:44:22,433 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-08 08:44:22,434 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 08:44:22,525 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 08:44:22,526 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:44:22,670 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 08:44:22,747 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 08:44:22,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992007673] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:44:22,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:44:22,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 21 [2025-02-08 08:44:22,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404069713] [2025-02-08 08:44:22,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:44:22,748 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-02-08 08:44:22,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:44:22,749 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-02-08 08:44:22,749 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2025-02-08 08:44:23,752 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 86 [2025-02-08 08:44:23,753 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 08:44:23,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:44:23,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 86 [2025-02-08 08:44:23,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:44:24,638 INFO L124 PetriNetUnfolderBase]: 2429/3826 cut-off events. [2025-02-08 08:44:24,638 INFO L125 PetriNetUnfolderBase]: For 2763/2905 co-relation queries the response was YES. [2025-02-08 08:44:24,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9937 conditions, 3826 events. 2429/3826 cut-off events. For 2763/2905 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 19344 event pairs, 619 based on Foata normal form. 80/3435 useless extension candidates. Maximal degree in co-relation 9665. Up to 2374 conditions per place. [2025-02-08 08:44:24,657 INFO L140 encePairwiseOnDemand]: 75/86 looper letters, 96 selfloop transitions, 28 changer transitions 11/148 dead transitions. [2025-02-08 08:44:24,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 148 transitions, 1285 flow [2025-02-08 08:44:24,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-02-08 08:44:24,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-02-08 08:44:24,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 535 transitions. [2025-02-08 08:44:24,659 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41472868217054265 [2025-02-08 08:44:24,659 INFO L175 Difference]: Start difference. First operand has 115 places, 107 transitions, 862 flow. Second operand 15 states and 535 transitions. [2025-02-08 08:44:24,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 148 transitions, 1285 flow [2025-02-08 08:44:24,666 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 08:44:24,669 INFO L231 Difference]: Finished difference. Result has 125 places, 103 transitions, 849 flow [2025-02-08 08:44:24,670 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 08:44:24,670 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 41 predicate places. [2025-02-08 08:44:24,670 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 103 transitions, 849 flow [2025-02-08 08:44:24,670 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 08:44:24,671 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:44:24,671 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 08:44:24,679 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 08:44:24,871 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 08:44:24,872 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2025-02-08 08:44:24,872 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:44:24,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1737526393, now seen corresponding path program 1 times [2025-02-08 08:44:24,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:44:24,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582750919] [2025-02-08 08:44:24,872 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:44:24,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:44:24,878 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-02-08 08:44:24,892 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-02-08 08:44:24,892 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:44:24,892 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:44:25,087 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-02-08 08:44:25,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:44:25,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582750919] [2025-02-08 08:44:25,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582750919] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:44:25,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602634116] [2025-02-08 08:44:25,087 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:44:25,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:44:25,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:44:25,089 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 08:44:25,091 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 08:44:25,157 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-02-08 08:44:25,191 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-02-08 08:44:25,192 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:44:25,192 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:44:25,194 INFO L256 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 37 conjuncts are in the unsatisfiable core [2025-02-08 08:44:25,195 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:44:25,215 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 08:44:25,264 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2025-02-08 08:44:25,264 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 08:44:25,627 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 08:44:25,628 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:44:25,826 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 08:44:25,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602634116] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-08 08:44:25,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-08 08:44:25,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6, 8] total 19 [2025-02-08 08:44:25,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227562610] [2025-02-08 08:44:25,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:44:25,827 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-08 08:44:25,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:44:25,827 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-08 08:44:25,827 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2025-02-08 08:44:25,989 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 86 [2025-02-08 08:44:25,989 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 08:44:25,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:44:25,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 86 [2025-02-08 08:44:25,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:44:26,383 INFO L124 PetriNetUnfolderBase]: 1867/2933 cut-off events. [2025-02-08 08:44:26,383 INFO L125 PetriNetUnfolderBase]: For 2562/2652 co-relation queries the response was YES. [2025-02-08 08:44:26,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7766 conditions, 2933 events. 1867/2933 cut-off events. For 2562/2652 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 14145 event pairs, 754 based on Foata normal form. 26/2547 useless extension candidates. Maximal degree in co-relation 7500. Up to 1347 conditions per place. [2025-02-08 08:44:26,397 INFO L140 encePairwiseOnDemand]: 75/86 looper letters, 95 selfloop transitions, 22 changer transitions 0/129 dead transitions. [2025-02-08 08:44:26,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 129 transitions, 1152 flow [2025-02-08 08:44:26,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-08 08:44:26,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-08 08:44:26,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 380 transitions. [2025-02-08 08:44:26,398 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4909560723514212 [2025-02-08 08:44:26,398 INFO L175 Difference]: Start difference. First operand has 125 places, 103 transitions, 849 flow. Second operand 9 states and 380 transitions. [2025-02-08 08:44:26,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 129 transitions, 1152 flow [2025-02-08 08:44:26,403 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 08:44:26,405 INFO L231 Difference]: Finished difference. Result has 128 places, 104 transitions, 887 flow [2025-02-08 08:44:26,405 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 08:44:26,405 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 44 predicate places. [2025-02-08 08:44:26,405 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 104 transitions, 887 flow [2025-02-08 08:44:26,406 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 08:44:26,406 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:44:26,406 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 08:44:26,414 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 08:44:26,609 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 08:44:26,610 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2025-02-08 08:44:26,610 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:44:26,610 INFO L85 PathProgramCache]: Analyzing trace with hash -178173326, now seen corresponding path program 2 times [2025-02-08 08:44:26,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:44:26,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264902561] [2025-02-08 08:44:26,610 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:44:26,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:44:26,617 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 30 statements into 2 equivalence classes. [2025-02-08 08:44:26,624 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 18 of 30 statements. [2025-02-08 08:44:26,624 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-08 08:44:26,624 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:44:26,706 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 08:44:26,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:44:26,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264902561] [2025-02-08 08:44:26,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264902561] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:44:26,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:44:26,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-08 08:44:26,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793238943] [2025-02-08 08:44:26,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:44:26,707 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:44:26,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:44:26,707 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:44:26,707 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-08 08:44:26,712 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 86 [2025-02-08 08:44:26,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 104 transitions, 887 flow. Second operand has 5 states, 5 states have (on average 37.4) internal successors, (187), 5 states have internal predecessors, (187), 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 08:44:26,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:44:26,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 86 [2025-02-08 08:44:26,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:44:26,979 INFO L124 PetriNetUnfolderBase]: 1274/2100 cut-off events. [2025-02-08 08:44:26,979 INFO L125 PetriNetUnfolderBase]: For 1941/2023 co-relation queries the response was YES. [2025-02-08 08:44:26,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5895 conditions, 2100 events. 1274/2100 cut-off events. For 1941/2023 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 10335 event pairs, 263 based on Foata normal form. 32/1972 useless extension candidates. Maximal degree in co-relation 5621. Up to 731 conditions per place. [2025-02-08 08:44:26,988 INFO L140 encePairwiseOnDemand]: 81/86 looper letters, 107 selfloop transitions, 9 changer transitions 7/135 dead transitions. [2025-02-08 08:44:26,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 135 transitions, 1280 flow [2025-02-08 08:44:26,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:44:26,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:44:26,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 234 transitions. [2025-02-08 08:44:26,990 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5441860465116279 [2025-02-08 08:44:26,990 INFO L175 Difference]: Start difference. First operand has 128 places, 104 transitions, 887 flow. Second operand 5 states and 234 transitions. [2025-02-08 08:44:26,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 135 transitions, 1280 flow [2025-02-08 08:44:26,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 135 transitions, 1239 flow, removed 3 selfloop flow, removed 6 redundant places. [2025-02-08 08:44:26,997 INFO L231 Difference]: Finished difference. Result has 123 places, 98 transitions, 848 flow [2025-02-08 08:44:26,997 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 08:44:26,998 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 39 predicate places. [2025-02-08 08:44:26,998 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 98 transitions, 848 flow [2025-02-08 08:44:26,998 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 37.4) internal successors, (187), 5 states have internal predecessors, (187), 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 08:44:26,998 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:44:26,998 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 08:44:26,998 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2025-02-08 08:44:26,999 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2025-02-08 08:44:26,999 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:44:26,999 INFO L85 PathProgramCache]: Analyzing trace with hash -597208577, now seen corresponding path program 1 times [2025-02-08 08:44:26,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:44:26,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130655545] [2025-02-08 08:44:26,999 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:44:27,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:44:27,007 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-02-08 08:44:27,023 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-02-08 08:44:27,023 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:44:27,023 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:44:27,121 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 08:44:27,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:44:27,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130655545] [2025-02-08 08:44:27,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130655545] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:44:27,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147347370] [2025-02-08 08:44:27,121 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:44:27,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:44:27,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:44:27,124 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 08:44:27,126 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 08:44:27,194 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-02-08 08:44:27,223 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-02-08 08:44:27,223 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:44:27,223 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:44:27,225 INFO L256 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-02-08 08:44:27,229 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:44:27,335 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 08:44:27,335 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:44:27,429 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 08:44:27,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147347370] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:44:27,430 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:44:27,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2025-02-08 08:44:27,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334449879] [2025-02-08 08:44:27,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:44:27,430 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-08 08:44:27,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:44:27,430 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-08 08:44:27,430 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2025-02-08 08:44:27,563 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 86 [2025-02-08 08:44:27,564 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 08:44:27,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:44:27,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 86 [2025-02-08 08:44:27,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:44:28,006 INFO L124 PetriNetUnfolderBase]: 1542/2678 cut-off events. [2025-02-08 08:44:28,007 INFO L125 PetriNetUnfolderBase]: For 2265/2265 co-relation queries the response was YES. [2025-02-08 08:44:28,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7660 conditions, 2678 events. 1542/2678 cut-off events. For 2265/2265 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 13991 event pairs, 829 based on Foata normal form. 32/2518 useless extension candidates. Maximal degree in co-relation 5831. Up to 1310 conditions per place. [2025-02-08 08:44:28,018 INFO L140 encePairwiseOnDemand]: 72/86 looper letters, 63 selfloop transitions, 25 changer transitions 59/159 dead transitions. [2025-02-08 08:44:28,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 159 transitions, 1488 flow [2025-02-08 08:44:28,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-02-08 08:44:28,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-02-08 08:44:28,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 653 transitions. [2025-02-08 08:44:28,020 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.506201550387597 [2025-02-08 08:44:28,020 INFO L175 Difference]: Start difference. First operand has 123 places, 98 transitions, 848 flow. Second operand 15 states and 653 transitions. [2025-02-08 08:44:28,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 159 transitions, 1488 flow [2025-02-08 08:44:28,024 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 08:44:28,026 INFO L231 Difference]: Finished difference. Result has 138 places, 81 transitions, 667 flow [2025-02-08 08:44:28,026 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 08:44:28,026 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 54 predicate places. [2025-02-08 08:44:28,026 INFO L471 AbstractCegarLoop]: Abstraction has has 138 places, 81 transitions, 667 flow [2025-02-08 08:44:28,027 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 08:44:28,027 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:44:28,027 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 08:44:28,033 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 08:44:28,227 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 08:44:28,227 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 08:44:28,228 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:44:28,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1316809008, now seen corresponding path program 1 times [2025-02-08 08:44:28,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:44:28,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369770668] [2025-02-08 08:44:28,228 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:44:28,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:44:28,239 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-02-08 08:44:28,247 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-02-08 08:44:28,247 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:44:28,247 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:44:28,340 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 08:44:28,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:44:28,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369770668] [2025-02-08 08:44:28,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369770668] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:44:28,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:44:28,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-02-08 08:44:28,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047542683] [2025-02-08 08:44:28,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:44:28,341 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-08 08:44:28,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:44:28,342 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-08 08:44:28,342 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-02-08 08:44:28,441 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 86 [2025-02-08 08:44:28,442 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 08:44:28,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:44:28,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 86 [2025-02-08 08:44:28,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:44:28,877 INFO L124 PetriNetUnfolderBase]: 1902/3555 cut-off events. [2025-02-08 08:44:28,878 INFO L125 PetriNetUnfolderBase]: For 2372/2372 co-relation queries the response was YES. [2025-02-08 08:44:28,885 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 23136 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 08:44:28,892 INFO L140 encePairwiseOnDemand]: 78/86 looper letters, 80 selfloop transitions, 8 changer transitions 15/115 dead transitions. [2025-02-08 08:44:28,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 115 transitions, 983 flow [2025-02-08 08:44:28,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-08 08:44:28,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-08 08:44:28,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 318 transitions. [2025-02-08 08:44:28,893 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5282392026578073 [2025-02-08 08:44:28,893 INFO L175 Difference]: Start difference. First operand has 138 places, 81 transitions, 667 flow. Second operand 7 states and 318 transitions. [2025-02-08 08:44:28,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 115 transitions, 983 flow [2025-02-08 08:44:28,900 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 08:44:28,901 INFO L231 Difference]: Finished difference. Result has 118 places, 67 transitions, 496 flow [2025-02-08 08:44:28,901 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 08:44:28,902 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 34 predicate places. [2025-02-08 08:44:28,902 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 67 transitions, 496 flow [2025-02-08 08:44:28,902 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 08:44:28,902 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:44:28,902 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 08:44:28,902 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2025-02-08 08:44:28,902 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2025-02-08 08:44:28,903 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:44:28,903 INFO L85 PathProgramCache]: Analyzing trace with hash 512297875, now seen corresponding path program 2 times [2025-02-08 08:44:28,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:44:28,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521019703] [2025-02-08 08:44:28,903 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:44:28,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:44:28,910 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 36 statements into 2 equivalence classes. [2025-02-08 08:44:28,954 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 36 of 36 statements. [2025-02-08 08:44:28,954 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:44:28,954 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:44:29,302 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2025-02-08 08:44:29,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:44:29,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521019703] [2025-02-08 08:44:29,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521019703] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:44:29,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80204498] [2025-02-08 08:44:29,303 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:44:29,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:44:29,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:44:29,305 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 08:44:29,308 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 08:44:29,378 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 36 statements into 2 equivalence classes. [2025-02-08 08:44:29,442 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 36 of 36 statements. [2025-02-08 08:44:29,443 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:44:29,443 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:44:29,445 INFO L256 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-02-08 08:44:29,447 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:44:29,454 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 08:44:29,458 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 08:44:29,556 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-02-08 08:44:29,556 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 08:44:29,577 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2025-02-08 08:44:29,579 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2025-02-08 08:44:29,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-08 08:44:29,649 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 08:44:29,658 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-08 08:44:29,659 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 08:44:29,792 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 08:44:29,792 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:44:30,402 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 08:44:30,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80204498] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:44:30,403 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:44:30,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 23 [2025-02-08 08:44:30,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203165048] [2025-02-08 08:44:30,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:44:30,403 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-02-08 08:44:30,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:44:30,404 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-02-08 08:44:30,404 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2025-02-08 08:44:31,424 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 86 [2025-02-08 08:44:31,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 67 transitions, 496 flow. Second operand has 25 states, 25 states have (on average 22.08) internal successors, (552), 25 states have internal predecessors, (552), 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 08:44:31,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:44:31,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 86 [2025-02-08 08:44:31,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:44:32,534 INFO L124 PetriNetUnfolderBase]: 3619/5832 cut-off events. [2025-02-08 08:44:32,534 INFO L125 PetriNetUnfolderBase]: For 1902/1902 co-relation queries the response was YES. [2025-02-08 08:44:32,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15450 conditions, 5832 events. 3619/5832 cut-off events. For 1902/1902 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 34201 event pairs, 27 based on Foata normal form. 384/5732 useless extension candidates. Maximal degree in co-relation 15356. Up to 2082 conditions per place. [2025-02-08 08:44:32,557 INFO L140 encePairwiseOnDemand]: 71/86 looper letters, 100 selfloop transitions, 18 changer transitions 0/125 dead transitions. [2025-02-08 08:44:32,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 125 transitions, 907 flow [2025-02-08 08:44:32,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-02-08 08:44:32,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-02-08 08:44:32,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 397 transitions. [2025-02-08 08:44:32,558 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3077519379844961 [2025-02-08 08:44:32,559 INFO L175 Difference]: Start difference. First operand has 118 places, 67 transitions, 496 flow. Second operand 15 states and 397 transitions. [2025-02-08 08:44:32,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 125 transitions, 907 flow [2025-02-08 08:44:32,562 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 08:44:32,563 INFO L231 Difference]: Finished difference. Result has 99 places, 67 transitions, 473 flow [2025-02-08 08:44:32,563 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 08:44:32,563 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 15 predicate places. [2025-02-08 08:44:32,563 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 67 transitions, 473 flow [2025-02-08 08:44:32,564 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 22.08) internal successors, (552), 25 states have internal predecessors, (552), 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 08:44:32,564 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:44:32,564 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 08:44:32,570 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 08:44:32,764 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 08:44:32,764 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2025-02-08 08:44:32,765 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:44:32,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1602958281, now seen corresponding path program 1 times [2025-02-08 08:44:32,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:44:32,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616084948] [2025-02-08 08:44:32,765 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:44:32,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:44:32,772 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-02-08 08:44:32,782 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-02-08 08:44:32,782 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:44:32,782 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:44:33,162 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 08:44:33,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:44:33,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616084948] [2025-02-08 08:44:33,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616084948] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:44:33,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060378188] [2025-02-08 08:44:33,163 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:44:33,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:44:33,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:44:33,165 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 08:44:33,171 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 08:44:33,244 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-02-08 08:44:33,286 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-02-08 08:44:33,286 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:44:33,286 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:44:33,288 INFO L256 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 42 conjuncts are in the unsatisfiable core [2025-02-08 08:44:33,291 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:44:33,320 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 08:44:33,323 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 08:44:33,405 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-02-08 08:44:33,405 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 08:44:33,431 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-08 08:44:33,431 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 08:44:33,910 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 08:44:33,910 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:44:34,280 INFO L173 IndexEqualityManager]: detected equality via solver [2025-02-08 08:44:34,286 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 08:44:34,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060378188] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:44:34,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:44:34,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 30 [2025-02-08 08:44:34,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571597586] [2025-02-08 08:44:34,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:44:34,286 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-02-08 08:44:34,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:44:34,287 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-02-08 08:44:34,287 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=803, Unknown=0, NotChecked=0, Total=930 [2025-02-08 08:44:36,155 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 86 [2025-02-08 08:44:36,156 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 08:44:36,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:44:36,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 86 [2025-02-08 08:44:36,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:44:37,390 INFO L124 PetriNetUnfolderBase]: 3917/6041 cut-off events. [2025-02-08 08:44:37,390 INFO L125 PetriNetUnfolderBase]: For 2464/2464 co-relation queries the response was YES. [2025-02-08 08:44:37,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15664 conditions, 6041 events. 3917/6041 cut-off events. For 2464/2464 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 33385 event pairs, 835 based on Foata normal form. 96/5614 useless extension candidates. Maximal degree in co-relation 15581. Up to 2082 conditions per place. [2025-02-08 08:44:37,416 INFO L140 encePairwiseOnDemand]: 74/86 looper letters, 91 selfloop transitions, 17 changer transitions 0/116 dead transitions. [2025-02-08 08:44:37,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 116 transitions, 825 flow [2025-02-08 08:44:37,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-02-08 08:44:37,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2025-02-08 08:44:37,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 507 transitions. [2025-02-08 08:44:37,417 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.34678522571819426 [2025-02-08 08:44:37,417 INFO L175 Difference]: Start difference. First operand has 99 places, 67 transitions, 473 flow. Second operand 17 states and 507 transitions. [2025-02-08 08:44:37,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 116 transitions, 825 flow [2025-02-08 08:44:37,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 116 transitions, 780 flow, removed 5 selfloop flow, removed 11 redundant places. [2025-02-08 08:44:37,426 INFO L231 Difference]: Finished difference. Result has 106 places, 68 transitions, 478 flow [2025-02-08 08:44:37,426 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=428, 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=478, PETRI_PLACES=106, PETRI_TRANSITIONS=68} [2025-02-08 08:44:37,426 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 22 predicate places. [2025-02-08 08:44:37,426 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 68 transitions, 478 flow [2025-02-08 08:44:37,427 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 08:44:37,427 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:44:37,427 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 08:44:37,433 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-02-08 08:44:37,627 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 08:44:37,627 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2025-02-08 08:44:37,628 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:44:37,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1228153057, now seen corresponding path program 2 times [2025-02-08 08:44:37,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:44:37,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685817587] [2025-02-08 08:44:37,628 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:44:37,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:44:37,637 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 44 statements into 2 equivalence classes. [2025-02-08 08:44:37,647 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 44 of 44 statements. [2025-02-08 08:44:37,647 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:44:37,648 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:44:37,795 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2025-02-08 08:44:37,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:44:37,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685817587] [2025-02-08 08:44:37,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685817587] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:44:37,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951652833] [2025-02-08 08:44:37,796 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:44:37,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:44:37,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:44:37,798 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 08:44:37,801 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 08:44:37,879 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 44 statements into 2 equivalence classes. [2025-02-08 08:44:37,915 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 44 of 44 statements. [2025-02-08 08:44:37,915 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:44:37,915 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:44:37,917 INFO L256 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-02-08 08:44:37,919 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:44:38,068 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2025-02-08 08:44:38,068 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:44:38,195 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2025-02-08 08:44:38,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951652833] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:44:38,196 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:44:38,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2025-02-08 08:44:38,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321168956] [2025-02-08 08:44:38,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:44:38,198 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-02-08 08:44:38,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:44:38,199 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-02-08 08:44:38,199 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=332, Unknown=0, NotChecked=0, Total=462 [2025-02-08 08:44:38,432 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 86 [2025-02-08 08:44:38,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 68 transitions, 478 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 08:44:38,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:44:38,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 86 [2025-02-08 08:44:38,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:44:39,341 INFO L124 PetriNetUnfolderBase]: 5298/8751 cut-off events. [2025-02-08 08:44:39,342 INFO L125 PetriNetUnfolderBase]: For 6619/6619 co-relation queries the response was YES. [2025-02-08 08:44:39,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23623 conditions, 8751 events. 5298/8751 cut-off events. For 6619/6619 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 55733 event pairs, 2850 based on Foata normal form. 96/8075 useless extension candidates. Maximal degree in co-relation 14334. Up to 4722 conditions per place. [2025-02-08 08:44:39,381 INFO L140 encePairwiseOnDemand]: 73/86 looper letters, 43 selfloop transitions, 21 changer transitions 92/166 dead transitions. [2025-02-08 08:44:39,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 166 transitions, 1402 flow [2025-02-08 08:44:39,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-02-08 08:44:39,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2025-02-08 08:44:39,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 776 transitions. [2025-02-08 08:44:39,383 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5012919896640827 [2025-02-08 08:44:39,383 INFO L175 Difference]: Start difference. First operand has 106 places, 68 transitions, 478 flow. Second operand 18 states and 776 transitions. [2025-02-08 08:44:39,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 166 transitions, 1402 flow [2025-02-08 08:44:39,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 166 transitions, 1352 flow, removed 0 selfloop flow, removed 14 redundant places. [2025-02-08 08:44:39,399 INFO L231 Difference]: Finished difference. Result has 117 places, 74 transitions, 615 flow [2025-02-08 08:44:39,399 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=451, 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=615, PETRI_PLACES=117, PETRI_TRANSITIONS=74} [2025-02-08 08:44:39,399 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 33 predicate places. [2025-02-08 08:44:39,400 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 74 transitions, 615 flow [2025-02-08 08:44:39,400 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 08:44:39,400 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:44:39,400 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 08:44:39,406 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 08:44:39,601 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 08:44:39,601 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2025-02-08 08:44:39,601 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:44:39,602 INFO L85 PathProgramCache]: Analyzing trace with hash -612579211, now seen corresponding path program 3 times [2025-02-08 08:44:39,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:44:39,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175576717] [2025-02-08 08:44:39,602 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 08:44:39,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:44:39,612 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 50 statements into 6 equivalence classes. [2025-02-08 08:44:39,628 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 20 of 50 statements. [2025-02-08 08:44:39,628 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-08 08:44:39,628 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:44:39,891 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2025-02-08 08:44:39,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:44:39,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175576717] [2025-02-08 08:44:39,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175576717] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:44:39,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285316747] [2025-02-08 08:44:39,891 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 08:44:39,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:44:39,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:44:39,894 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 08:44:39,897 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 08:44:39,979 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 50 statements into 6 equivalence classes. [2025-02-08 08:44:40,011 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 20 of 50 statements. [2025-02-08 08:44:40,011 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-08 08:44:40,011 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:44:40,013 INFO L256 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 41 conjuncts are in the unsatisfiable core [2025-02-08 08:44:40,015 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:44:40,018 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 08:44:40,075 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 08:44:40,088 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2025-02-08 08:44:40,089 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 20 treesize of output 22 [2025-02-08 08:44:40,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-08 08:44:40,240 INFO L349 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2025-02-08 08:44:40,240 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 23 treesize of output 28 [2025-02-08 08:44:40,253 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-08 08:44:40,253 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 08:44:40,858 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2025-02-08 08:44:40,858 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:44:41,640 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 10 treesize of output 8 [2025-02-08 08:44:41,657 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 10 treesize of output 8 [2025-02-08 08:44:41,915 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2025-02-08 08:44:41,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285316747] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:44:41,915 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:44:41,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 14 [2025-02-08 08:44:41,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722606145] [2025-02-08 08:44:41,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:44:41,916 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-02-08 08:44:41,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:44:41,916 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-02-08 08:44:41,916 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2025-02-08 08:44:43,078 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 86 [2025-02-08 08:44:43,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 74 transitions, 615 flow. Second operand has 16 states, 16 states have (on average 28.5625) internal successors, (457), 16 states have internal predecessors, (457), 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 08:44:43,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:44:43,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 86 [2025-02-08 08:44:43,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:44:43,929 INFO L124 PetriNetUnfolderBase]: 4095/6154 cut-off events. [2025-02-08 08:44:43,929 INFO L125 PetriNetUnfolderBase]: For 3961/3961 co-relation queries the response was YES. [2025-02-08 08:44:43,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16857 conditions, 6154 events. 4095/6154 cut-off events. For 3961/3961 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 34616 event pairs, 561 based on Foata normal form. 96/5749 useless extension candidates. Maximal degree in co-relation 16745. Up to 4646 conditions per place. [2025-02-08 08:44:43,947 INFO L140 encePairwiseOnDemand]: 78/86 looper letters, 0 selfloop transitions, 0 changer transitions 93/93 dead transitions. [2025-02-08 08:44:43,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 93 transitions, 835 flow [2025-02-08 08:44:43,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-08 08:44:43,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-08 08:44:43,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 248 transitions. [2025-02-08 08:44:43,948 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36046511627906974 [2025-02-08 08:44:43,948 INFO L175 Difference]: Start difference. First operand has 117 places, 74 transitions, 615 flow. Second operand 8 states and 248 transitions. [2025-02-08 08:44:43,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 93 transitions, 835 flow [2025-02-08 08:44:43,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 93 transitions, 789 flow, removed 10 selfloop flow, removed 11 redundant places. [2025-02-08 08:44:43,962 INFO L231 Difference]: Finished difference. Result has 101 places, 0 transitions, 0 flow [2025-02-08 08:44:43,963 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=563, 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 08:44:43,963 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 17 predicate places. [2025-02-08 08:44:43,963 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 0 transitions, 0 flow [2025-02-08 08:44:43,963 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 28.5625) internal successors, (457), 16 states have internal predecessors, (457), 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 08:44:43,966 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 51 remaining) [2025-02-08 08:44:43,966 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 51 remaining) [2025-02-08 08:44:43,966 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 51 remaining) [2025-02-08 08:44:43,966 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 51 remaining) [2025-02-08 08:44:43,967 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 51 remaining) [2025-02-08 08:44:43,967 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 51 remaining) [2025-02-08 08:44:43,967 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 51 remaining) [2025-02-08 08:44:43,967 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 51 remaining) [2025-02-08 08:44:43,967 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 51 remaining) [2025-02-08 08:44:43,967 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 51 remaining) [2025-02-08 08:44:43,967 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 51 remaining) [2025-02-08 08:44:43,967 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 51 remaining) [2025-02-08 08:44:43,967 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread3Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 51 remaining) [2025-02-08 08:44:43,967 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 51 remaining) [2025-02-08 08:44:43,967 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 51 remaining) [2025-02-08 08:44:43,968 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 51 remaining) [2025-02-08 08:44:43,968 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 51 remaining) [2025-02-08 08:44:43,968 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 51 remaining) [2025-02-08 08:44:43,968 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 51 remaining) [2025-02-08 08:44:43,968 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 51 remaining) [2025-02-08 08:44:43,968 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 51 remaining) [2025-02-08 08:44:43,968 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 51 remaining) [2025-02-08 08:44:43,968 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 51 remaining) [2025-02-08 08:44:43,968 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 51 remaining) [2025-02-08 08:44:43,968 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 51 remaining) [2025-02-08 08:44:43,968 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 51 remaining) [2025-02-08 08:44:43,968 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 51 remaining) [2025-02-08 08:44:43,969 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 51 remaining) [2025-02-08 08:44:43,969 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 51 remaining) [2025-02-08 08:44:43,969 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 51 remaining) [2025-02-08 08:44:43,969 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK (20 of 51 remaining) [2025-02-08 08:44:43,969 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (19 of 51 remaining) [2025-02-08 08:44:43,969 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (18 of 51 remaining) [2025-02-08 08:44:43,969 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (17 of 51 remaining) [2025-02-08 08:44:43,969 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (16 of 51 remaining) [2025-02-08 08:44:43,969 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 51 remaining) [2025-02-08 08:44:43,969 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 51 remaining) [2025-02-08 08:44:43,969 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 51 remaining) [2025-02-08 08:44:43,969 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 51 remaining) [2025-02-08 08:44:43,969 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 51 remaining) [2025-02-08 08:44:43,969 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 51 remaining) [2025-02-08 08:44:43,969 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 51 remaining) [2025-02-08 08:44:43,969 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 51 remaining) [2025-02-08 08:44:43,969 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 51 remaining) [2025-02-08 08:44:43,969 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 51 remaining) [2025-02-08 08:44:43,969 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 51 remaining) [2025-02-08 08:44:43,969 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 51 remaining) [2025-02-08 08:44:43,969 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread3Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 51 remaining) [2025-02-08 08:44:43,969 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 51 remaining) [2025-02-08 08:44:43,969 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 51 remaining) [2025-02-08 08:44:43,970 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 51 remaining) [2025-02-08 08:44:43,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2025-02-08 08:44:44,170 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 08:44:44,170 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 08:44:44,175 INFO L241 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-02-08 08:44:44,175 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-02-08 08:44:44,181 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.02 08:44:44 BasicIcfg [2025-02-08 08:44:44,181 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-02-08 08:44:44,182 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-02-08 08:44:44,182 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-02-08 08:44:44,182 INFO L274 PluginConnector]: Witness Printer initialized [2025-02-08 08:44:44,183 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 08:43:47" (3/4) ... [2025-02-08 08:44:44,184 INFO L146 WitnessPrinter]: Generating witness for correct program [2025-02-08 08:44:44,187 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure thread1 [2025-02-08 08:44:44,187 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure thread2 [2025-02-08 08:44:44,187 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure thread3 [2025-02-08 08:44:44,199 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 158 nodes and edges [2025-02-08 08:44:44,200 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 70 nodes and edges [2025-02-08 08:44:44,201 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 27 nodes and edges [2025-02-08 08:44:44,201 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2025-02-08 08:44:44,292 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/witness.graphml [2025-02-08 08:44:44,293 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/witness.yml [2025-02-08 08:44:44,293 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-02-08 08:44:44,295 INFO L158 Benchmark]: Toolchain (without parser) took 58436.90ms. Allocated memory was 142.6MB in the beginning and 1.5GB in the end (delta: 1.3GB). Free memory was 112.4MB in the beginning and 945.6MB in the end (delta: -833.2MB). Peak memory consumption was 504.2MB. Max. memory is 16.1GB. [2025-02-08 08:44:44,296 INFO L158 Benchmark]: CDTParser took 1.01ms. Allocated memory is still 201.3MB. Free memory is still 124.0MB. There was no memory consumed. Max. memory is 16.1GB. [2025-02-08 08:44:44,296 INFO L158 Benchmark]: CACSL2BoogieTranslator took 214.46ms. Allocated memory is still 142.6MB. Free memory was 112.4MB in the beginning and 100.1MB in the end (delta: 12.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-02-08 08:44:44,296 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.77ms. Allocated memory is still 142.6MB. Free memory was 100.1MB in the beginning and 98.2MB in the end (delta: 1.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-02-08 08:44:44,296 INFO L158 Benchmark]: Boogie Preprocessor took 55.35ms. Allocated memory is still 142.6MB. Free memory was 98.2MB in the beginning and 95.6MB in the end (delta: 2.6MB). There was no memory consumed. Max. memory is 16.1GB. [2025-02-08 08:44:44,296 INFO L158 Benchmark]: IcfgBuilder took 967.20ms. Allocated memory is still 142.6MB. Free memory was 95.6MB in the beginning and 86.1MB in the end (delta: 9.5MB). Peak memory consumption was 64.8MB. Max. memory is 16.1GB. [2025-02-08 08:44:44,297 INFO L158 Benchmark]: TraceAbstraction took 57050.53ms. Allocated memory was 142.6MB in the beginning and 1.5GB in the end (delta: 1.3GB). Free memory was 86.1MB in the beginning and 953.9MB in the end (delta: -867.8MB). Peak memory consumption was 1.2GB. Max. memory is 16.1GB. [2025-02-08 08:44:44,297 INFO L158 Benchmark]: Witness Printer took 111.20ms. Allocated memory is still 1.5GB. Free memory was 953.9MB in the beginning and 945.6MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-02-08 08:44:44,298 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.01ms. Allocated memory is still 201.3MB. Free memory is still 124.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 214.46ms. Allocated memory is still 142.6MB. Free memory was 112.4MB in the beginning and 100.1MB in the end (delta: 12.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 31.77ms. Allocated memory is still 142.6MB. Free memory was 100.1MB in the beginning and 98.2MB in the end (delta: 1.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 55.35ms. Allocated memory is still 142.6MB. Free memory was 98.2MB in the beginning and 95.6MB in the end (delta: 2.6MB). There was no memory consumed. Max. memory is 16.1GB. * IcfgBuilder took 967.20ms. Allocated memory is still 142.6MB. Free memory was 95.6MB in the beginning and 86.1MB in the end (delta: 9.5MB). Peak memory consumption was 64.8MB. Max. memory is 16.1GB. * TraceAbstraction took 57050.53ms. Allocated memory was 142.6MB in the beginning and 1.5GB in the end (delta: 1.3GB). Free memory was 86.1MB in the beginning and 953.9MB in the end (delta: -867.8MB). Peak memory consumption was 1.2GB. Max. memory is 16.1GB. * Witness Printer took 111.20ms. Allocated memory is still 1.5GB. Free memory was 953.9MB in the beginning and 945.6MB in the end (delta: 8.4MB). 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: 56.9s, OverallIterations: 28, TraceHistogramMax: 4, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 37.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 4 mSolverCounterUnknown, 7539 SdHoareTripleChecker+Valid, 23.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 6714 mSDsluCounter, 3919 SdHoareTripleChecker+Invalid, 21.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3859 mSDsCounter, 580 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 26370 IncrementalHoareTripleChecker+Invalid, 26954 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 580 mSolverCounterUnsat, 60 mSDtfsCounter, 26370 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 981 GetRequests, 585 SyntacticMatches, 7 SemanticMatches, 389 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1668 ImplicationChecksByTransitivity, 6.1s 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: 0.3s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 13.4s InterpolantComputationTime, 931 NumberOfCodeBlocks, 823 NumberOfCodeBlocksAsserted, 55 NumberOfCheckSat, 1247 ConstructedInterpolants, 125 QuantifiedInterpolants, 19950 SizeOfPredicates, 98 NumberOfNonLiveVariables, 3519 ConjunctsInSsa, 345 ConjunctsInUnsatCore, 62 InterpolantComputations, 14 PerfectInterpolantSequences, 620/796 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 08:44:44,328 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE