./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.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-bad-buffer-mult-alt2.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 a79fe9fcfc95192d454ac05616e4d9a71dbf2bcc8b4fd9d21dcef47910a50542 --- Real Ultimate output --- This is Ultimate 0.3.0-?-48c9605-m [2025-02-08 08:38:14,901 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-08 08:38:14,965 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-02-08 08:38:14,974 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-08 08:38:14,978 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-08 08:38:15,006 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-08 08:38:15,007 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-08 08:38:15,007 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-08 08:38:15,008 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-08 08:38:15,008 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-08 08:38:15,009 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-08 08:38:15,009 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-08 08:38:15,009 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-08 08:38:15,009 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-08 08:38:15,010 INFO L153 SettingsManager]: * Use SBE=true [2025-02-08 08:38:15,010 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-08 08:38:15,010 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-08 08:38:15,010 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-08 08:38:15,010 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-08 08:38:15,011 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-08 08:38:15,011 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-02-08 08:38:15,011 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-02-08 08:38:15,011 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-02-08 08:38:15,011 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-08 08:38:15,011 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-02-08 08:38:15,011 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-08 08:38:15,011 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-08 08:38:15,011 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-08 08:38:15,012 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-08 08:38:15,012 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-08 08:38:15,012 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-08 08:38:15,012 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-08 08:38:15,013 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-08 08:38:15,013 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 08:38:15,013 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-08 08:38:15,013 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-08 08:38:15,013 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-08 08:38:15,013 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-08 08:38:15,013 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-08 08:38:15,014 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-08 08:38:15,014 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-08 08:38:15,014 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-08 08:38:15,014 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 -> a79fe9fcfc95192d454ac05616e4d9a71dbf2bcc8b4fd9d21dcef47910a50542 [2025-02-08 08:38:15,291 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-08 08:38:15,301 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-08 08:38:15,303 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-08 08:38:15,304 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-08 08:38:15,304 INFO L274 PluginConnector]: CDTParser initialized [2025-02-08 08:38:15,305 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c [2025-02-08 08:38:16,607 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/8e6e1d934/394324075d0c4c14b005eb267c35db55/FLAGab9c5419d [2025-02-08 08:38:16,844 INFO L384 CDTParser]: Found 1 translation units. [2025-02-08 08:38:16,844 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c [2025-02-08 08:38:16,852 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/8e6e1d934/394324075d0c4c14b005eb267c35db55/FLAGab9c5419d [2025-02-08 08:38:16,871 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/8e6e1d934/394324075d0c4c14b005eb267c35db55 [2025-02-08 08:38:16,874 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-08 08:38:16,875 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-08 08:38:16,876 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-08 08:38:16,877 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-08 08:38:16,881 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-08 08:38:16,881 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 08:38:16" (1/1) ... [2025-02-08 08:38:16,882 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c8f24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:38:16, skipping insertion in model container [2025-02-08 08:38:16,882 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 08:38:16" (1/1) ... [2025-02-08 08:38:16,898 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-08 08:38:17,077 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 08:38:17,084 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 08:38:17,098 INFO L200 MainTranslator]: Completed pre-run [2025-02-08 08:38:17,133 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 08:38:17,153 INFO L204 MainTranslator]: Completed translation [2025-02-08 08:38:17,154 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:38:17 WrapperNode [2025-02-08 08:38:17,154 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-08 08:38:17,155 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-08 08:38:17,156 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-08 08:38:17,156 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-08 08:38:17,161 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:38:17" (1/1) ... [2025-02-08 08:38:17,173 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:38:17" (1/1) ... [2025-02-08 08:38:17,204 INFO L138 Inliner]: procedures = 25, calls = 56, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 291 [2025-02-08 08:38:17,204 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-08 08:38:17,205 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-08 08:38:17,205 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-08 08:38:17,205 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-08 08:38:17,217 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:38:17" (1/1) ... [2025-02-08 08:38:17,218 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:38:17" (1/1) ... [2025-02-08 08:38:17,221 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:38:17" (1/1) ... [2025-02-08 08:38:17,245 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2025-02-08 08:38:17,250 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:38:17" (1/1) ... [2025-02-08 08:38:17,250 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:38:17" (1/1) ... [2025-02-08 08:38:17,260 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:38:17" (1/1) ... [2025-02-08 08:38:17,261 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:38:17" (1/1) ... [2025-02-08 08:38:17,267 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:38:17" (1/1) ... [2025-02-08 08:38:17,268 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:38:17" (1/1) ... [2025-02-08 08:38:17,270 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-08 08:38:17,275 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-08 08:38:17,275 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-08 08:38:17,275 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-08 08:38:17,276 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:38:17" (1/1) ... [2025-02-08 08:38:17,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 08:38:17,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:38:17,317 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 08:38:17,323 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 08:38:17,342 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-08 08:38:17,342 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-02-08 08:38:17,342 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-02-08 08:38:17,343 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-02-08 08:38:17,343 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-02-08 08:38:17,343 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-02-08 08:38:17,343 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-02-08 08:38:17,343 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2025-02-08 08:38:17,343 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2025-02-08 08:38:17,343 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-08 08:38:17,343 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-08 08:38:17,344 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-08 08:38:17,344 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-08 08:38:17,344 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-02-08 08:38:17,344 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-02-08 08:38:17,344 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-08 08:38:17,344 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-08 08:38:17,344 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-08 08:38:17,344 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-08 08:38:17,344 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-08 08:38:17,346 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 08:38:17,467 INFO L257 CfgBuilder]: Building ICFG [2025-02-08 08:38:17,469 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-08 08:38:17,653 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L93: ~cond~2#1 := (if 0 == (if ~i~0 < ~N~0 || ~q1_front~0 < ~q1_back~0 then 1 else 0) then 0 else 1); [2025-02-08 08:38:17,654 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L90: havoc #t~ret10#1; [2025-02-08 08:38:17,654 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L90-1: havoc #t~mem9#1; [2025-02-08 08:38:17,654 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L90-2: ~total~0 := #t~ret10#1; [2025-02-08 08:38:17,654 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L90-3: assume { :end_inline_plus } true;assume -2147483648 <= #t~ret10#1 && #t~ret10#1 <= 2147483647; [2025-02-08 08:38:17,654 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L90-4: havoc plus_#in~a#1, plus_#in~b#1; [2025-02-08 08:38:17,654 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L90-5: havoc plus_~a#1, plus_~b#1; [2025-02-08 08:38:17,654 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L90-6: #t~ret10#1 := plus_#res#1; [2025-02-08 08:38:17,654 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L95: [2025-02-08 08:38:17,654 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L91: havoc #t~post11#1; [2025-02-08 08:38:17,654 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L91-1: ~q1_front~0 := 1 + #t~post11#1; [2025-02-08 08:38:17,654 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L91-2: #t~post11#1 := ~q1_front~0; [2025-02-08 08:38:17,654 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L92: [2025-02-08 08:38:17,722 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L110: [2025-02-08 08:38:17,722 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L111: ~cond~3#1 := (if 0 == (if ~j~0 < ~M~0 || ~q2_front~0 < ~q2_back~0 then 1 else 0) then 0 else 1); [2025-02-08 08:38:17,722 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L108: havoc #t~ret13#1; [2025-02-08 08:38:17,722 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L108-1: havoc #t~mem12#1; [2025-02-08 08:38:17,722 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L108-2: ~total~0 := #t~ret13#1; [2025-02-08 08:38:17,722 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L108-3: assume { :end_inline_plus } true;assume -2147483648 <= #t~ret13#1 && #t~ret13#1 <= 2147483647; [2025-02-08 08:38:17,722 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L108-4: havoc plus_#in~a#1, plus_#in~b#1; [2025-02-08 08:38:17,722 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L108-5: havoc plus_~a#1, plus_~b#1; [2025-02-08 08:38:17,722 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L108-6: #t~ret13#1 := plus_#res#1; [2025-02-08 08:38:17,723 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L113: [2025-02-08 08:38:17,723 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L109: havoc #t~post14#1; [2025-02-08 08:38:17,723 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L109-1: ~q2_front~0 := 1 + #t~post14#1; [2025-02-08 08:38:17,723 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L109-2: #t~post14#1 := ~q2_front~0; [2025-02-08 08:38:17,931 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-08 08:38:17,932 INFO L308 CfgBuilder]: Performing block encoding [2025-02-08 08:38:18,243 WARN L149 AtomicBlockAnalyzer]: Unexpected successor node of atomic block begin: L169 is not an error location. [2025-02-08 08:38:18,243 WARN L149 AtomicBlockAnalyzer]: Unexpected successor node of atomic block begin: L169 is not an error location. [2025-02-08 08:38:18,244 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-08 08:38:18,244 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-08 08:38:18,244 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 08:38:18 BoogieIcfgContainer [2025-02-08 08:38:18,245 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-08 08:38:18,247 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-08 08:38:18,247 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-08 08:38:18,251 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-08 08:38:18,252 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.02 08:38:16" (1/3) ... [2025-02-08 08:38:18,252 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c633dac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 08:38:18, skipping insertion in model container [2025-02-08 08:38:18,252 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:38:17" (2/3) ... [2025-02-08 08:38:18,253 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c633dac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 08:38:18, skipping insertion in model container [2025-02-08 08:38:18,253 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 08:38:18" (3/3) ... [2025-02-08 08:38:18,254 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-bad-buffer-mult-alt2.wvr.c [2025-02-08 08:38:18,270 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-08 08:38:18,271 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-bad-buffer-mult-alt2.wvr.c that has 5 procedures, 59 locations, 1 initial locations, 6 loop locations, and 14 error locations. [2025-02-08 08:38:18,271 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-08 08:38:18,342 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2025-02-08 08:38:18,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 71 places, 62 transitions, 152 flow [2025-02-08 08:38:18,404 INFO L124 PetriNetUnfolderBase]: 4/58 cut-off events. [2025-02-08 08:38:18,406 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-02-08 08:38:18,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75 conditions, 58 events. 4/58 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 127 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2025-02-08 08:38:18,410 INFO L82 GeneralOperation]: Start removeDead. Operand has 71 places, 62 transitions, 152 flow [2025-02-08 08:38:18,412 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 57 transitions, 138 flow [2025-02-08 08:38:18,418 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-08 08:38:18,427 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;@50312f3c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-08 08:38:18,427 INFO L334 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2025-02-08 08:38:18,431 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-08 08:38:18,431 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-02-08 08:38:18,431 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-08 08:38:18,432 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:38:18,432 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-08 08:38:18,432 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-02-08 08:38:18,437 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:38:18,437 INFO L85 PathProgramCache]: Analyzing trace with hash 766988, now seen corresponding path program 1 times [2025-02-08 08:38:18,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:38:18,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116367472] [2025-02-08 08:38:18,446 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:38:18,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:38:18,509 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-08 08:38:18,538 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-08 08:38:18,538 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:38:18,539 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:38:18,681 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 08:38:18,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:38:18,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116367472] [2025-02-08 08:38:18,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116367472] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:38:18,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:38:18,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-02-08 08:38:18,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026916373] [2025-02-08 08:38:18,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:38:18,692 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-08 08:38:18,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:38:18,716 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-08 08:38:18,717 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-08 08:38:18,732 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 62 [2025-02-08 08:38:18,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 57 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:38:18,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:38:18,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 62 [2025-02-08 08:38:18,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:38:20,394 INFO L124 PetriNetUnfolderBase]: 10232/14040 cut-off events. [2025-02-08 08:38:20,395 INFO L125 PetriNetUnfolderBase]: For 374/374 co-relation queries the response was YES. [2025-02-08 08:38:20,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28428 conditions, 14040 events. 10232/14040 cut-off events. For 374/374 co-relation queries the response was YES. Maximal size of possible extension queue 828. Compared 83418 event pairs, 9160 based on Foata normal form. 1/9555 useless extension candidates. Maximal degree in co-relation 26340. Up to 13600 conditions per place. [2025-02-08 08:38:20,522 INFO L140 encePairwiseOnDemand]: 57/62 looper letters, 40 selfloop transitions, 2 changer transitions 0/53 dead transitions. [2025-02-08 08:38:20,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 53 transitions, 214 flow [2025-02-08 08:38:20,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-08 08:38:20,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-08 08:38:20,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 93 transitions. [2025-02-08 08:38:20,535 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5 [2025-02-08 08:38:20,537 INFO L175 Difference]: Start difference. First operand has 66 places, 57 transitions, 138 flow. Second operand 3 states and 93 transitions. [2025-02-08 08:38:20,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 53 transitions, 214 flow [2025-02-08 08:38:20,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 53 transitions, 198 flow, removed 0 selfloop flow, removed 8 redundant places. [2025-02-08 08:38:20,574 INFO L231 Difference]: Finished difference. Result has 56 places, 53 transitions, 118 flow [2025-02-08 08:38:20,576 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=56, PETRI_TRANSITIONS=53} [2025-02-08 08:38:20,579 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, -10 predicate places. [2025-02-08 08:38:20,580 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 53 transitions, 118 flow [2025-02-08 08:38:20,580 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:38:20,580 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:38:20,580 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-08 08:38:20,580 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-08 08:38:20,580 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-02-08 08:38:20,581 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:38:20,581 INFO L85 PathProgramCache]: Analyzing trace with hash 766989, now seen corresponding path program 1 times [2025-02-08 08:38:20,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:38:20,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728203321] [2025-02-08 08:38:20,582 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:38:20,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:38:20,594 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-08 08:38:20,630 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-08 08:38:20,631 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:38:20,631 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:38:20,989 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 08:38:20,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:38:20,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728203321] [2025-02-08 08:38:20,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728203321] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:38:20,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:38:20,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-08 08:38:20,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330319709] [2025-02-08 08:38:20,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:38:20,994 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:38:20,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:38:20,994 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:38:20,994 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:38:21,016 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 62 [2025-02-08 08:38:21,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 53 transitions, 118 flow. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:38:21,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:38:21,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 62 [2025-02-08 08:38:21,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:38:22,329 INFO L124 PetriNetUnfolderBase]: 10233/14043 cut-off events. [2025-02-08 08:38:22,329 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2025-02-08 08:38:22,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27917 conditions, 14043 events. 10233/14043 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 828. Compared 83482 event pairs, 9160 based on Foata normal form. 0/9555 useless extension candidates. Maximal degree in co-relation 27888. Up to 13609 conditions per place. [2025-02-08 08:38:22,409 INFO L140 encePairwiseOnDemand]: 57/62 looper letters, 43 selfloop transitions, 4 changer transitions 0/56 dead transitions. [2025-02-08 08:38:22,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 56 transitions, 218 flow [2025-02-08 08:38:22,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 08:38:22,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 08:38:22,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 112 transitions. [2025-02-08 08:38:22,413 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45161290322580644 [2025-02-08 08:38:22,413 INFO L175 Difference]: Start difference. First operand has 56 places, 53 transitions, 118 flow. Second operand 4 states and 112 transitions. [2025-02-08 08:38:22,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 56 transitions, 218 flow [2025-02-08 08:38:22,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 56 transitions, 214 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:38:22,416 INFO L231 Difference]: Finished difference. Result has 59 places, 56 transitions, 141 flow [2025-02-08 08:38:22,416 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=141, PETRI_PLACES=59, PETRI_TRANSITIONS=56} [2025-02-08 08:38:22,417 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, -7 predicate places. [2025-02-08 08:38:22,417 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 56 transitions, 141 flow [2025-02-08 08:38:22,417 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:38:22,417 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:38:22,417 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2025-02-08 08:38:22,418 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-08 08:38:22,418 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-02-08 08:38:22,419 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:38:22,419 INFO L85 PathProgramCache]: Analyzing trace with hash 23777728, now seen corresponding path program 1 times [2025-02-08 08:38:22,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:38:22,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361876406] [2025-02-08 08:38:22,419 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:38:22,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:38:22,433 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-02-08 08:38:22,451 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-02-08 08:38:22,452 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:38:22,452 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:38:22,711 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 08:38:22,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:38:22,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361876406] [2025-02-08 08:38:22,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361876406] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:38:22,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:38:22,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-08 08:38:22,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645946182] [2025-02-08 08:38:22,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:38:22,712 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:38:22,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:38:22,713 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:38:22,713 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-08 08:38:22,743 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 62 [2025-02-08 08:38:22,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 56 transitions, 141 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:38:22,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:38:22,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 62 [2025-02-08 08:38:22,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:38:23,977 INFO L124 PetriNetUnfolderBase]: 10234/14046 cut-off events. [2025-02-08 08:38:23,978 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2025-02-08 08:38:23,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27934 conditions, 14046 events. 10234/14046 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 828. Compared 83479 event pairs, 9160 based on Foata normal form. 0/9557 useless extension candidates. Maximal degree in co-relation 27909. Up to 13608 conditions per place. [2025-02-08 08:38:24,056 INFO L140 encePairwiseOnDemand]: 54/62 looper letters, 43 selfloop transitions, 7 changer transitions 0/59 dead transitions. [2025-02-08 08:38:24,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 59 transitions, 247 flow [2025-02-08 08:38:24,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:38:24,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:38:24,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2025-02-08 08:38:24,062 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42258064516129035 [2025-02-08 08:38:24,062 INFO L175 Difference]: Start difference. First operand has 59 places, 56 transitions, 141 flow. Second operand 5 states and 131 transitions. [2025-02-08 08:38:24,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 59 transitions, 247 flow [2025-02-08 08:38:24,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 59 transitions, 244 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-08 08:38:24,064 INFO L231 Difference]: Finished difference. Result has 64 places, 59 transitions, 175 flow [2025-02-08 08:38:24,064 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=175, PETRI_PLACES=64, PETRI_TRANSITIONS=59} [2025-02-08 08:38:24,066 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, -2 predicate places. [2025-02-08 08:38:24,067 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 59 transitions, 175 flow [2025-02-08 08:38:24,067 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:38:24,067 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:38:24,067 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2025-02-08 08:38:24,067 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-02-08 08:38:24,067 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-02-08 08:38:24,068 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:38:24,068 INFO L85 PathProgramCache]: Analyzing trace with hash 737100565, now seen corresponding path program 1 times [2025-02-08 08:38:24,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:38:24,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269199781] [2025-02-08 08:38:24,069 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:38:24,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:38:24,081 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-08 08:38:24,096 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-08 08:38:24,098 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:38:24,098 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:38:24,366 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 08:38:24,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:38:24,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269199781] [2025-02-08 08:38:24,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269199781] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:38:24,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698975834] [2025-02-08 08:38:24,367 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:38:24,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:38:24,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:38:24,370 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 08:38:24,372 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 08:38:24,433 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-08 08:38:24,447 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-08 08:38:24,448 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:38:24,448 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:38:24,449 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-08 08:38:24,453 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:38:24,510 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 08:38:24,719 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 08:38:24,719 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:38:24,836 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 08:38:24,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698975834] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:38:24,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:38:24,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2025-02-08 08:38:24,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760637299] [2025-02-08 08:38:24,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:38:24,837 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-08 08:38:24,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:38:24,838 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-08 08:38:24,839 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2025-02-08 08:38:25,023 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 62 [2025-02-08 08:38:25,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 59 transitions, 175 flow. Second operand has 11 states, 11 states have (on average 17.363636363636363) internal successors, (191), 11 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:38:25,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:38:25,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 62 [2025-02-08 08:38:25,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:38:26,475 INFO L124 PetriNetUnfolderBase]: 10235/14048 cut-off events. [2025-02-08 08:38:26,476 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2025-02-08 08:38:26,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27957 conditions, 14048 events. 10235/14048 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 828. Compared 83518 event pairs, 9160 based on Foata normal form. 0/9562 useless extension candidates. Maximal degree in co-relation 27919. Up to 13609 conditions per place. [2025-02-08 08:38:26,544 INFO L140 encePairwiseOnDemand]: 57/62 looper letters, 42 selfloop transitions, 10 changer transitions 0/61 dead transitions. [2025-02-08 08:38:26,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 61 transitions, 290 flow [2025-02-08 08:38:26,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-08 08:38:26,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-08 08:38:26,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2025-02-08 08:38:26,547 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36088709677419356 [2025-02-08 08:38:26,547 INFO L175 Difference]: Start difference. First operand has 64 places, 59 transitions, 175 flow. Second operand 8 states and 179 transitions. [2025-02-08 08:38:26,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 61 transitions, 290 flow [2025-02-08 08:38:26,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 61 transitions, 289 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-08 08:38:26,549 INFO L231 Difference]: Finished difference. Result has 69 places, 61 transitions, 205 flow [2025-02-08 08:38:26,549 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=205, PETRI_PLACES=69, PETRI_TRANSITIONS=61} [2025-02-08 08:38:26,552 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 3 predicate places. [2025-02-08 08:38:26,553 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 61 transitions, 205 flow [2025-02-08 08:38:26,553 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 17.363636363636363) internal successors, (191), 11 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:38:26,553 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:38:26,553 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2025-02-08 08:38:26,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-02-08 08:38:26,754 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 08:38:26,755 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-02-08 08:38:26,755 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:38:26,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1375583858, now seen corresponding path program 1 times [2025-02-08 08:38:26,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:38:26,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375820703] [2025-02-08 08:38:26,756 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:38:26,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:38:26,762 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-08 08:38:26,772 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-08 08:38:26,776 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:38:26,778 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:38:26,979 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 08:38:26,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:38:26,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375820703] [2025-02-08 08:38:26,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375820703] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:38:26,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894586003] [2025-02-08 08:38:26,981 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:38:26,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:38:26,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:38:26,983 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 08:38:26,986 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 08:38:27,043 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-08 08:38:27,062 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-08 08:38:27,063 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:38:27,063 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:38:27,064 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-08 08:38:27,065 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:38:27,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2025-02-08 08:38:27,259 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 08:38:27,259 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:38:27,419 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 08:38:27,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894586003] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:38:27,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:38:27,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2025-02-08 08:38:27,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846100393] [2025-02-08 08:38:27,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:38:27,421 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-08 08:38:27,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:38:27,421 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-08 08:38:27,421 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2025-02-08 08:38:27,501 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 62 [2025-02-08 08:38:27,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 61 transitions, 205 flow. Second operand has 13 states, 13 states have (on average 17.307692307692307) internal successors, (225), 13 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:38:27,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:38:27,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 62 [2025-02-08 08:38:27,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:38:28,583 INFO L124 PetriNetUnfolderBase]: 10236/14050 cut-off events. [2025-02-08 08:38:28,583 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2025-02-08 08:38:28,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27973 conditions, 14050 events. 10236/14050 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 828. Compared 83596 event pairs, 9160 based on Foata normal form. 0/9564 useless extension candidates. Maximal degree in co-relation 27927. Up to 13601 conditions per place. [2025-02-08 08:38:28,658 INFO L140 encePairwiseOnDemand]: 54/62 looper letters, 36 selfloop transitions, 18 changer transitions 0/63 dead transitions. [2025-02-08 08:38:28,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 63 transitions, 321 flow [2025-02-08 08:38:28,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-08 08:38:28,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-08 08:38:28,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 200 transitions. [2025-02-08 08:38:28,660 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35842293906810035 [2025-02-08 08:38:28,660 INFO L175 Difference]: Start difference. First operand has 69 places, 61 transitions, 205 flow. Second operand 9 states and 200 transitions. [2025-02-08 08:38:28,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 63 transitions, 321 flow [2025-02-08 08:38:28,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 63 transitions, 274 flow, removed 6 selfloop flow, removed 8 redundant places. [2025-02-08 08:38:28,662 INFO L231 Difference]: Finished difference. Result has 68 places, 63 transitions, 202 flow [2025-02-08 08:38:28,662 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=202, PETRI_PLACES=68, PETRI_TRANSITIONS=63} [2025-02-08 08:38:28,663 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 2 predicate places. [2025-02-08 08:38:28,663 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 63 transitions, 202 flow [2025-02-08 08:38:28,663 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 17.307692307692307) internal successors, (225), 13 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:38:28,663 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:38:28,664 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:38:28,671 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-02-08 08:38:28,868 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 08:38:28,868 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-02-08 08:38:28,868 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:38:28,868 INFO L85 PathProgramCache]: Analyzing trace with hash -799838914, now seen corresponding path program 1 times [2025-02-08 08:38:28,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:38:28,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656854613] [2025-02-08 08:38:28,869 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:38:28,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:38:28,878 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-08 08:38:28,885 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-08 08:38:28,885 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:38:28,886 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:38:28,955 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 08:38:28,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:38:28,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656854613] [2025-02-08 08:38:28,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656854613] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:38:28,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:38:28,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-08 08:38:28,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335995609] [2025-02-08 08:38:28,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:38:28,956 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:38:28,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:38:28,956 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:38:28,957 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:38:28,961 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2025-02-08 08:38:28,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 63 transitions, 202 flow. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:38:28,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:38:28,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2025-02-08 08:38:28,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:38:29,794 INFO L124 PetriNetUnfolderBase]: 12585/17447 cut-off events. [2025-02-08 08:38:29,794 INFO L125 PetriNetUnfolderBase]: For 58/58 co-relation queries the response was YES. [2025-02-08 08:38:29,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34745 conditions, 17447 events. 12585/17447 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 980. Compared 107654 event pairs, 11357 based on Foata normal form. 541/12904 useless extension candidates. Maximal degree in co-relation 27912. Up to 13615 conditions per place. [2025-02-08 08:38:29,863 INFO L140 encePairwiseOnDemand]: 51/62 looper letters, 86 selfloop transitions, 5 changer transitions 0/100 dead transitions. [2025-02-08 08:38:29,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 100 transitions, 504 flow [2025-02-08 08:38:29,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:38:29,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:38:29,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 175 transitions. [2025-02-08 08:38:29,864 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5645161290322581 [2025-02-08 08:38:29,865 INFO L175 Difference]: Start difference. First operand has 68 places, 63 transitions, 202 flow. Second operand 5 states and 175 transitions. [2025-02-08 08:38:29,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 100 transitions, 504 flow [2025-02-08 08:38:29,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 100 transitions, 451 flow, removed 12 selfloop flow, removed 5 redundant places. [2025-02-08 08:38:29,867 INFO L231 Difference]: Finished difference. Result has 69 places, 65 transitions, 208 flow [2025-02-08 08:38:29,867 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=208, PETRI_PLACES=69, PETRI_TRANSITIONS=65} [2025-02-08 08:38:29,868 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 3 predicate places. [2025-02-08 08:38:29,868 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 65 transitions, 208 flow [2025-02-08 08:38:29,868 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:38:29,868 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:38:29,868 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:38:29,868 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-02-08 08:38:29,868 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-02-08 08:38:29,869 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:38:29,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1393032394, now seen corresponding path program 1 times [2025-02-08 08:38:29,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:38:29,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795258841] [2025-02-08 08:38:29,870 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:38:29,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:38:29,878 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-08 08:38:29,890 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-08 08:38:29,891 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:38:29,891 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:38:29,978 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 08:38:29,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:38:29,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795258841] [2025-02-08 08:38:29,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795258841] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:38:29,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:38:29,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-08 08:38:29,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476073164] [2025-02-08 08:38:29,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:38:29,980 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:38:29,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:38:29,980 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:38:29,980 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:38:29,992 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 62 [2025-02-08 08:38:29,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 65 transitions, 208 flow. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:38:29,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:38:29,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 62 [2025-02-08 08:38:29,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:38:30,906 INFO L124 PetriNetUnfolderBase]: 9494/13244 cut-off events. [2025-02-08 08:38:30,906 INFO L125 PetriNetUnfolderBase]: For 936/936 co-relation queries the response was YES. [2025-02-08 08:38:30,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28173 conditions, 13244 events. 9494/13244 cut-off events. For 936/936 co-relation queries the response was YES. Maximal size of possible extension queue 738. Compared 79591 event pairs, 8512 based on Foata normal form. 0/10029 useless extension candidates. Maximal degree in co-relation 21380. Up to 12812 conditions per place. [2025-02-08 08:38:30,973 INFO L140 encePairwiseOnDemand]: 57/62 looper letters, 46 selfloop transitions, 8 changer transitions 0/63 dead transitions. [2025-02-08 08:38:30,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 63 transitions, 308 flow [2025-02-08 08:38:30,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:38:30,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:38:30,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2025-02-08 08:38:30,975 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3935483870967742 [2025-02-08 08:38:30,975 INFO L175 Difference]: Start difference. First operand has 69 places, 65 transitions, 208 flow. Second operand 5 states and 122 transitions. [2025-02-08 08:38:30,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 63 transitions, 308 flow [2025-02-08 08:38:30,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 63 transitions, 303 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:38:30,980 INFO L231 Difference]: Finished difference. Result has 69 places, 63 transitions, 211 flow [2025-02-08 08:38:30,980 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=211, PETRI_PLACES=69, PETRI_TRANSITIONS=63} [2025-02-08 08:38:30,981 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 3 predicate places. [2025-02-08 08:38:30,981 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 63 transitions, 211 flow [2025-02-08 08:38:30,981 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:38:30,981 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:38:30,981 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:38:30,981 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-02-08 08:38:30,981 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-02-08 08:38:30,982 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:38:30,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1393032393, now seen corresponding path program 1 times [2025-02-08 08:38:30,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:38:30,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718150026] [2025-02-08 08:38:30,982 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:38:30,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:38:30,990 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-08 08:38:31,000 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-08 08:38:31,000 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:38:31,000 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:38:31,245 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:38:31,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:38:31,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718150026] [2025-02-08 08:38:31,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718150026] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:38:31,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431528639] [2025-02-08 08:38:31,246 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:38:31,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:38:31,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:38:31,249 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 08:38:31,251 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 08:38:31,312 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-08 08:38:31,333 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-08 08:38:31,333 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:38:31,333 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:38:31,335 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-02-08 08:38:31,336 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:38:31,347 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 08:38:31,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-08 08:38:31,411 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 08:38:31,429 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-08 08:38:31,430 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 08:38:31,466 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 08:38:31,467 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-08 08:38:31,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431528639] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:38:31,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-08 08:38:31,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 6 [2025-02-08 08:38:31,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946005534] [2025-02-08 08:38:31,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:38:31,468 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:38:31,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:38:31,469 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:38:31,469 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2025-02-08 08:38:31,486 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 62 [2025-02-08 08:38:31,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 63 transitions, 211 flow. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:38:31,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:38:31,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 62 [2025-02-08 08:38:31,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:38:32,217 INFO L124 PetriNetUnfolderBase]: 6955/9785 cut-off events. [2025-02-08 08:38:32,217 INFO L125 PetriNetUnfolderBase]: For 767/767 co-relation queries the response was YES. [2025-02-08 08:38:32,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20246 conditions, 9785 events. 6955/9785 cut-off events. For 767/767 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 57134 event pairs, 6191 based on Foata normal form. 0/8038 useless extension candidates. Maximal degree in co-relation 13398. Up to 9476 conditions per place. [2025-02-08 08:38:32,262 INFO L140 encePairwiseOnDemand]: 58/62 looper letters, 48 selfloop transitions, 4 changer transitions 0/61 dead transitions. [2025-02-08 08:38:32,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 61 transitions, 307 flow [2025-02-08 08:38:32,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 08:38:32,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 08:38:32,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 104 transitions. [2025-02-08 08:38:32,264 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2025-02-08 08:38:32,264 INFO L175 Difference]: Start difference. First operand has 69 places, 63 transitions, 211 flow. Second operand 4 states and 104 transitions. [2025-02-08 08:38:32,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 61 transitions, 307 flow [2025-02-08 08:38:32,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 61 transitions, 295 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-08 08:38:32,267 INFO L231 Difference]: Finished difference. Result has 67 places, 61 transitions, 199 flow [2025-02-08 08:38:32,267 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=199, PETRI_PLACES=67, PETRI_TRANSITIONS=61} [2025-02-08 08:38:32,267 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 1 predicate places. [2025-02-08 08:38:32,268 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 61 transitions, 199 flow [2025-02-08 08:38:32,268 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:38:32,268 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:38:32,268 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:38:32,276 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-02-08 08:38:32,472 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:38:32,472 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-02-08 08:38:32,472 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:38:32,472 INFO L85 PathProgramCache]: Analyzing trace with hash -390719758, now seen corresponding path program 1 times [2025-02-08 08:38:32,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:38:32,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680566890] [2025-02-08 08:38:32,473 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:38:32,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:38:32,479 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-08 08:38:32,486 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-08 08:38:32,487 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:38:32,487 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:38:32,553 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 08:38:32,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:38:32,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680566890] [2025-02-08 08:38:32,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680566890] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:38:32,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:38:32,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-08 08:38:32,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339076769] [2025-02-08 08:38:32,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:38:32,556 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:38:32,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:38:32,557 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:38:32,557 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:38:32,562 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2025-02-08 08:38:32,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 61 transitions, 199 flow. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:38:32,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:38:32,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2025-02-08 08:38:32,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:38:33,162 INFO L124 PetriNetUnfolderBase]: 8628/12362 cut-off events. [2025-02-08 08:38:33,163 INFO L125 PetriNetUnfolderBase]: For 998/998 co-relation queries the response was YES. [2025-02-08 08:38:33,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25565 conditions, 12362 events. 8628/12362 cut-off events. For 998/998 co-relation queries the response was YES. Maximal size of possible extension queue 637. Compared 75945 event pairs, 7762 based on Foata normal form. 333/11134 useless extension candidates. Maximal degree in co-relation 16980. Up to 9477 conditions per place. [2025-02-08 08:38:33,210 INFO L140 encePairwiseOnDemand]: 53/62 looper letters, 68 selfloop transitions, 7 changer transitions 1/85 dead transitions. [2025-02-08 08:38:33,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 85 transitions, 411 flow [2025-02-08 08:38:33,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 08:38:33,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 08:38:33,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 143 transitions. [2025-02-08 08:38:33,211 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5766129032258065 [2025-02-08 08:38:33,211 INFO L175 Difference]: Start difference. First operand has 67 places, 61 transitions, 199 flow. Second operand 4 states and 143 transitions. [2025-02-08 08:38:33,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 85 transitions, 411 flow [2025-02-08 08:38:33,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 85 transitions, 406 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:38:33,215 INFO L231 Difference]: Finished difference. Result has 69 places, 61 transitions, 222 flow [2025-02-08 08:38:33,215 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=222, PETRI_PLACES=69, PETRI_TRANSITIONS=61} [2025-02-08 08:38:33,215 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 3 predicate places. [2025-02-08 08:38:33,215 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 61 transitions, 222 flow [2025-02-08 08:38:33,215 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:38:33,215 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:38:33,216 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:38:33,216 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-02-08 08:38:33,216 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-02-08 08:38:33,216 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:38:33,216 INFO L85 PathProgramCache]: Analyzing trace with hash 175978020, now seen corresponding path program 1 times [2025-02-08 08:38:33,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:38:33,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710859103] [2025-02-08 08:38:33,216 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:38:33,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:38:33,223 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-08 08:38:33,228 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-08 08:38:33,229 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:38:33,229 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:38:33,411 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 08:38:33,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:38:33,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710859103] [2025-02-08 08:38:33,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710859103] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:38:33,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188839222] [2025-02-08 08:38:33,411 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:38:33,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:38:33,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:38:33,414 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 08:38:33,416 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 08:38:33,476 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-08 08:38:33,494 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-08 08:38:33,495 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:38:33,495 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:38:33,496 INFO L256 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-02-08 08:38:33,497 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:38:33,569 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 08:38:33,569 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-08 08:38:33,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188839222] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:38:33,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-08 08:38:33,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2025-02-08 08:38:33,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857975938] [2025-02-08 08:38:33,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:38:33,570 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:38:33,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:38:33,570 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:38:33,570 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-02-08 08:38:33,583 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2025-02-08 08:38:33,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 61 transitions, 222 flow. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:38:33,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:38:33,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2025-02-08 08:38:33,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:38:34,053 INFO L124 PetriNetUnfolderBase]: 6601/9585 cut-off events. [2025-02-08 08:38:34,053 INFO L125 PetriNetUnfolderBase]: For 1400/1400 co-relation queries the response was YES. [2025-02-08 08:38:34,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21116 conditions, 9585 events. 6601/9585 cut-off events. For 1400/1400 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 57950 event pairs, 5890 based on Foata normal form. 0/8698 useless extension candidates. Maximal degree in co-relation 13970. Up to 9159 conditions per place. [2025-02-08 08:38:34,091 INFO L140 encePairwiseOnDemand]: 58/62 looper letters, 43 selfloop transitions, 7 changer transitions 0/59 dead transitions. [2025-02-08 08:38:34,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 59 transitions, 314 flow [2025-02-08 08:38:34,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 08:38:34,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 08:38:34,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 110 transitions. [2025-02-08 08:38:34,093 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4435483870967742 [2025-02-08 08:38:34,093 INFO L175 Difference]: Start difference. First operand has 69 places, 61 transitions, 222 flow. Second operand 4 states and 110 transitions. [2025-02-08 08:38:34,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 59 transitions, 314 flow [2025-02-08 08:38:34,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 59 transitions, 309 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-08 08:38:34,097 INFO L231 Difference]: Finished difference. Result has 69 places, 59 transitions, 223 flow [2025-02-08 08:38:34,097 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=223, PETRI_PLACES=69, PETRI_TRANSITIONS=59} [2025-02-08 08:38:34,097 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 3 predicate places. [2025-02-08 08:38:34,097 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 59 transitions, 223 flow [2025-02-08 08:38:34,098 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:38:34,098 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:38:34,098 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:38:34,106 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-02-08 08:38:34,298 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,SelfDestructingSolverStorable9 [2025-02-08 08:38:34,299 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-02-08 08:38:34,299 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:38:34,299 INFO L85 PathProgramCache]: Analyzing trace with hash 175978019, now seen corresponding path program 1 times [2025-02-08 08:38:34,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:38:34,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620312105] [2025-02-08 08:38:34,299 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:38:34,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:38:34,308 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-08 08:38:34,314 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-08 08:38:34,314 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:38:34,314 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:38:34,356 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 08:38:34,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:38:34,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620312105] [2025-02-08 08:38:34,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620312105] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:38:34,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:38:34,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-08 08:38:34,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489135445] [2025-02-08 08:38:34,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:38:34,358 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:38:34,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:38:34,359 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:38:34,360 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:38:34,369 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 62 [2025-02-08 08:38:34,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 59 transitions, 223 flow. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 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 08:38:34,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:38:34,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 62 [2025-02-08 08:38:34,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:38:34,778 INFO L124 PetriNetUnfolderBase]: 4922/7270 cut-off events. [2025-02-08 08:38:34,778 INFO L125 PetriNetUnfolderBase]: For 1126/1126 co-relation queries the response was YES. [2025-02-08 08:38:34,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15582 conditions, 7270 events. 4922/7270 cut-off events. For 1126/1126 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 43064 event pairs, 4350 based on Foata normal form. 0/7066 useless extension candidates. Maximal degree in co-relation 10311. Up to 6894 conditions per place. [2025-02-08 08:38:34,804 INFO L140 encePairwiseOnDemand]: 58/62 looper letters, 41 selfloop transitions, 5 changer transitions 2/57 dead transitions. [2025-02-08 08:38:34,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 57 transitions, 311 flow [2025-02-08 08:38:34,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 08:38:34,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 08:38:34,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 100 transitions. [2025-02-08 08:38:34,805 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4032258064516129 [2025-02-08 08:38:34,805 INFO L175 Difference]: Start difference. First operand has 69 places, 59 transitions, 223 flow. Second operand 4 states and 100 transitions. [2025-02-08 08:38:34,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 57 transitions, 311 flow [2025-02-08 08:38:34,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 57 transitions, 301 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:38:34,808 INFO L231 Difference]: Finished difference. Result has 68 places, 55 transitions, 207 flow [2025-02-08 08:38:34,808 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=207, PETRI_PLACES=68, PETRI_TRANSITIONS=55} [2025-02-08 08:38:34,808 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 2 predicate places. [2025-02-08 08:38:34,808 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 55 transitions, 207 flow [2025-02-08 08:38:34,809 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 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 08:38:34,809 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:38:34,809 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:38:34,809 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2025-02-08 08:38:34,809 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-02-08 08:38:34,809 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:38:34,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1927900216, now seen corresponding path program 1 times [2025-02-08 08:38:34,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:38:34,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644493642] [2025-02-08 08:38:34,809 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:38:34,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:38:34,817 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-02-08 08:38:34,824 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-02-08 08:38:34,824 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:38:34,824 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:38:35,002 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 08:38:35,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:38:35,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644493642] [2025-02-08 08:38:35,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644493642] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:38:35,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:38:35,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-08 08:38:35,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675211475] [2025-02-08 08:38:35,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:38:35,004 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:38:35,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:38:35,004 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:38:35,005 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2025-02-08 08:38:35,011 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2025-02-08 08:38:35,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 55 transitions, 207 flow. Second operand has 5 states, 5 states have (on average 22.8) internal successors, (114), 5 states have internal predecessors, (114), 0 states have call successors, (0), 0 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 08:38:35,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:38:35,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2025-02-08 08:38:35,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:38:35,313 INFO L124 PetriNetUnfolderBase]: 3315/5378 cut-off events. [2025-02-08 08:38:35,314 INFO L125 PetriNetUnfolderBase]: For 576/576 co-relation queries the response was YES. [2025-02-08 08:38:35,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10952 conditions, 5378 events. 3315/5378 cut-off events. For 576/576 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 33756 event pairs, 530 based on Foata normal form. 372/5728 useless extension candidates. Maximal degree in co-relation 8248. Up to 2427 conditions per place. [2025-02-08 08:38:35,342 INFO L140 encePairwiseOnDemand]: 57/62 looper letters, 68 selfloop transitions, 6 changer transitions 3/86 dead transitions. [2025-02-08 08:38:35,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 86 transitions, 435 flow [2025-02-08 08:38:35,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:38:35,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:38:35,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 154 transitions. [2025-02-08 08:38:35,343 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4967741935483871 [2025-02-08 08:38:35,343 INFO L175 Difference]: Start difference. First operand has 68 places, 55 transitions, 207 flow. Second operand 5 states and 154 transitions. [2025-02-08 08:38:35,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 86 transitions, 435 flow [2025-02-08 08:38:35,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 86 transitions, 429 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:38:35,345 INFO L231 Difference]: Finished difference. Result has 69 places, 53 transitions, 194 flow [2025-02-08 08:38:35,346 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=194, PETRI_PLACES=69, PETRI_TRANSITIONS=53} [2025-02-08 08:38:35,346 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 3 predicate places. [2025-02-08 08:38:35,346 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 53 transitions, 194 flow [2025-02-08 08:38:35,346 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.8) internal successors, (114), 5 states have internal predecessors, (114), 0 states have call successors, (0), 0 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 08:38:35,346 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:38:35,347 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:38:35,347 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2025-02-08 08:38:35,347 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-02-08 08:38:35,347 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:38:35,347 INFO L85 PathProgramCache]: Analyzing trace with hash 268178507, now seen corresponding path program 1 times [2025-02-08 08:38:35,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:38:35,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097058333] [2025-02-08 08:38:35,348 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:38:35,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:38:35,361 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 34 statements into 1 equivalence classes. [2025-02-08 08:38:35,373 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 34 of 34 statements. [2025-02-08 08:38:35,374 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:38:35,374 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:38:35,562 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-08 08:38:35,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:38:35,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097058333] [2025-02-08 08:38:35,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097058333] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:38:35,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:38:35,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-08 08:38:35,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24310809] [2025-02-08 08:38:35,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:38:35,563 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:38:35,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:38:35,565 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:38:35,565 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-08 08:38:35,568 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2025-02-08 08:38:35,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 53 transitions, 194 flow. Second operand has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 states have internal predecessors, (118), 0 states have call successors, (0), 0 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 08:38:35,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:38:35,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2025-02-08 08:38:35,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:38:35,879 INFO L124 PetriNetUnfolderBase]: 2582/4162 cut-off events. [2025-02-08 08:38:35,880 INFO L125 PetriNetUnfolderBase]: For 1814/1814 co-relation queries the response was YES. [2025-02-08 08:38:35,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9462 conditions, 4162 events. 2582/4162 cut-off events. For 1814/1814 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 24635 event pairs, 468 based on Foata normal form. 307/4459 useless extension candidates. Maximal degree in co-relation 9423. Up to 2315 conditions per place. [2025-02-08 08:38:35,894 INFO L140 encePairwiseOnDemand]: 57/62 looper letters, 52 selfloop transitions, 5 changer transitions 26/92 dead transitions. [2025-02-08 08:38:35,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 92 transitions, 465 flow [2025-02-08 08:38:35,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-08 08:38:35,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-08 08:38:35,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 182 transitions. [2025-02-08 08:38:35,896 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.489247311827957 [2025-02-08 08:38:35,896 INFO L175 Difference]: Start difference. First operand has 69 places, 53 transitions, 194 flow. Second operand 6 states and 182 transitions. [2025-02-08 08:38:35,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 92 transitions, 465 flow [2025-02-08 08:38:35,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 92 transitions, 441 flow, removed 6 selfloop flow, removed 5 redundant places. [2025-02-08 08:38:35,900 INFO L231 Difference]: Finished difference. Result has 70 places, 53 transitions, 196 flow [2025-02-08 08:38:35,900 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=196, PETRI_PLACES=70, PETRI_TRANSITIONS=53} [2025-02-08 08:38:35,900 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 4 predicate places. [2025-02-08 08:38:35,900 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 53 transitions, 196 flow [2025-02-08 08:38:35,901 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 states have internal predecessors, (118), 0 states have call successors, (0), 0 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 08:38:35,901 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:38:35,901 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:38:35,901 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2025-02-08 08:38:35,901 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-02-08 08:38:35,901 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:38:35,902 INFO L85 PathProgramCache]: Analyzing trace with hash 271540189, now seen corresponding path program 2 times [2025-02-08 08:38:35,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:38:35,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485091295] [2025-02-08 08:38:35,902 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:38:35,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:38:35,912 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 34 statements into 2 equivalence classes. [2025-02-08 08:38:35,925 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 34 of 34 statements. [2025-02-08 08:38:35,925 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:38:35,925 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:38:36,062 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 08:38:36,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:38:36,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485091295] [2025-02-08 08:38:36,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485091295] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:38:36,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387812473] [2025-02-08 08:38:36,062 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:38:36,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:38:36,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:38:36,067 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 08:38:36,068 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 08:38:36,133 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 34 statements into 2 equivalence classes. [2025-02-08 08:38:36,164 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 34 of 34 statements. [2025-02-08 08:38:36,164 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:38:36,164 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:38:36,166 INFO L256 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-02-08 08:38:36,167 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:38:36,260 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 08:38:36,260 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:38:36,331 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 08:38:36,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387812473] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-08 08:38:36,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-08 08:38:36,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 10 [2025-02-08 08:38:36,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546896061] [2025-02-08 08:38:36,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:38:36,332 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:38:36,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:38:36,333 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:38:36,333 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2025-02-08 08:38:36,335 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 62 [2025-02-08 08:38:36,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 53 transitions, 196 flow. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 0 states have call successors, (0), 0 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 08:38:36,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:38:36,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 62 [2025-02-08 08:38:36,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:38:36,599 INFO L124 PetriNetUnfolderBase]: 1875/2800 cut-off events. [2025-02-08 08:38:36,600 INFO L125 PetriNetUnfolderBase]: For 1094/1094 co-relation queries the response was YES. [2025-02-08 08:38:36,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6614 conditions, 2800 events. 1875/2800 cut-off events. For 1094/1094 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 13665 event pairs, 190 based on Foata normal form. 195/2989 useless extension candidates. Maximal degree in co-relation 6606. Up to 1518 conditions per place. [2025-02-08 08:38:36,607 INFO L140 encePairwiseOnDemand]: 58/62 looper letters, 0 selfloop transitions, 0 changer transitions 75/75 dead transitions. [2025-02-08 08:38:36,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 75 transitions, 384 flow [2025-02-08 08:38:36,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:38:36,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:38:36,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2025-02-08 08:38:36,609 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4612903225806452 [2025-02-08 08:38:36,609 INFO L175 Difference]: Start difference. First operand has 70 places, 53 transitions, 196 flow. Second operand 5 states and 143 transitions. [2025-02-08 08:38:36,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 75 transitions, 384 flow [2025-02-08 08:38:36,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 75 transitions, 374 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-08 08:38:36,610 INFO L231 Difference]: Finished difference. Result has 64 places, 0 transitions, 0 flow [2025-02-08 08:38:36,611 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=64, PETRI_TRANSITIONS=0} [2025-02-08 08:38:36,611 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, -2 predicate places. [2025-02-08 08:38:36,611 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 0 transitions, 0 flow [2025-02-08 08:38:36,611 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 0 states have call successors, (0), 0 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 08:38:36,614 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 26 remaining) [2025-02-08 08:38:36,614 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 26 remaining) [2025-02-08 08:38:36,614 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 26 remaining) [2025-02-08 08:38:36,614 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 26 remaining) [2025-02-08 08:38:36,614 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 26 remaining) [2025-02-08 08:38:36,614 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 26 remaining) [2025-02-08 08:38:36,614 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 26 remaining) [2025-02-08 08:38:36,614 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 26 remaining) [2025-02-08 08:38:36,615 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 26 remaining) [2025-02-08 08:38:36,615 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 26 remaining) [2025-02-08 08:38:36,615 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK (15 of 26 remaining) [2025-02-08 08:38:36,615 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (14 of 26 remaining) [2025-02-08 08:38:36,615 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (13 of 26 remaining) [2025-02-08 08:38:36,615 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 26 remaining) [2025-02-08 08:38:36,615 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (11 of 26 remaining) [2025-02-08 08:38:36,615 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (10 of 26 remaining) [2025-02-08 08:38:36,615 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread4Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 26 remaining) [2025-02-08 08:38:36,615 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 26 remaining) [2025-02-08 08:38:36,615 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 26 remaining) [2025-02-08 08:38:36,615 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 26 remaining) [2025-02-08 08:38:36,616 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 26 remaining) [2025-02-08 08:38:36,616 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 26 remaining) [2025-02-08 08:38:36,616 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 26 remaining) [2025-02-08 08:38:36,616 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 26 remaining) [2025-02-08 08:38:36,616 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread4Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 26 remaining) [2025-02-08 08:38:36,616 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 26 remaining) [2025-02-08 08:38:36,624 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 08:38:36,820 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,SelfDestructingSolverStorable13 [2025-02-08 08:38:36,821 INFO L422 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:38:36,825 INFO L241 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-02-08 08:38:36,825 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-02-08 08:38:36,830 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.02 08:38:36 BasicIcfg [2025-02-08 08:38:36,831 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-02-08 08:38:36,832 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-02-08 08:38:36,832 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-02-08 08:38:36,832 INFO L274 PluginConnector]: Witness Printer initialized [2025-02-08 08:38:36,833 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 08:38:18" (3/4) ... [2025-02-08 08:38:36,834 INFO L146 WitnessPrinter]: Generating witness for correct program [2025-02-08 08:38:36,837 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure thread1 [2025-02-08 08:38:36,837 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure thread2 [2025-02-08 08:38:36,838 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure thread3 [2025-02-08 08:38:36,838 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure thread4 [2025-02-08 08:38:36,845 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 126 nodes and edges [2025-02-08 08:38:36,846 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 52 nodes and edges [2025-02-08 08:38:36,846 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 26 nodes and edges [2025-02-08 08:38:36,846 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2025-02-08 08:38:36,847 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2025-02-08 08:38:36,941 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/witness.graphml [2025-02-08 08:38:36,941 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/witness.yml [2025-02-08 08:38:36,941 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-02-08 08:38:36,942 INFO L158 Benchmark]: Toolchain (without parser) took 20066.54ms. Allocated memory was 167.8MB in the beginning and 2.2GB in the end (delta: 2.0GB). Free memory was 133.1MB in the beginning and 1.1GB in the end (delta: -1.0GB). Peak memory consumption was 1.0GB. Max. memory is 16.1GB. [2025-02-08 08:38:36,943 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 201.3MB. Free memory is still 127.9MB. There was no memory consumed. Max. memory is 16.1GB. [2025-02-08 08:38:36,943 INFO L158 Benchmark]: CACSL2BoogieTranslator took 278.11ms. Allocated memory is still 167.8MB. Free memory was 132.7MB in the beginning and 120.0MB in the end (delta: 12.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-02-08 08:38:36,943 INFO L158 Benchmark]: Boogie Procedure Inliner took 49.06ms. Allocated memory is still 167.8MB. Free memory was 120.0MB in the beginning and 117.5MB in the end (delta: 2.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-02-08 08:38:36,943 INFO L158 Benchmark]: Boogie Preprocessor took 65.22ms. Allocated memory is still 167.8MB. Free memory was 117.5MB in the beginning and 115.1MB in the end (delta: 2.4MB). There was no memory consumed. Max. memory is 16.1GB. [2025-02-08 08:38:36,944 INFO L158 Benchmark]: IcfgBuilder took 970.05ms. Allocated memory is still 167.8MB. Free memory was 115.1MB in the beginning and 117.2MB in the end (delta: -2.1MB). Peak memory consumption was 73.8MB. Max. memory is 16.1GB. [2025-02-08 08:38:36,944 INFO L158 Benchmark]: TraceAbstraction took 18584.50ms. Allocated memory was 167.8MB in the beginning and 2.2GB in the end (delta: 2.0GB). Free memory was 117.2MB in the beginning and 1.1GB in the end (delta: -1.0GB). Peak memory consumption was 977.9MB. Max. memory is 16.1GB. [2025-02-08 08:38:36,944 INFO L158 Benchmark]: Witness Printer took 109.26ms. Allocated memory is still 2.2GB. Free memory was 1.1GB in the beginning and 1.1GB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-02-08 08:38:36,945 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 201.3MB. Free memory is still 127.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 278.11ms. Allocated memory is still 167.8MB. Free memory was 132.7MB in the beginning and 120.0MB in the end (delta: 12.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 49.06ms. Allocated memory is still 167.8MB. Free memory was 120.0MB in the beginning and 117.5MB in the end (delta: 2.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 65.22ms. Allocated memory is still 167.8MB. Free memory was 117.5MB in the beginning and 115.1MB in the end (delta: 2.4MB). There was no memory consumed. Max. memory is 16.1GB. * IcfgBuilder took 970.05ms. Allocated memory is still 167.8MB. Free memory was 115.1MB in the beginning and 117.2MB in the end (delta: -2.1MB). Peak memory consumption was 73.8MB. Max. memory is 16.1GB. * TraceAbstraction took 18584.50ms. Allocated memory was 167.8MB in the beginning and 2.2GB in the end (delta: 2.0GB). Free memory was 117.2MB in the beginning and 1.1GB in the end (delta: -1.0GB). Peak memory consumption was 977.9MB. Max. memory is 16.1GB. * Witness Printer took 109.26ms. Allocated memory is still 2.2GB. Free memory was 1.1GB in the beginning and 1.1GB 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: 21]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 119]: all allocated memory was freed For all program executions holds that all allocated memory was freed 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 - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 9 procedures, 95 locations, 26 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: 18.5s, OverallIterations: 14, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 12.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 588 SdHoareTripleChecker+Valid, 2.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 515 mSDsluCounter, 41 SdHoareTripleChecker+Invalid, 1.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 19 mSDsCounter, 54 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2077 IncrementalHoareTripleChecker+Invalid, 2131 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 54 mSolverCounterUnsat, 22 mSDtfsCounter, 2077 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 166 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=223occurred in iteration=10, InterpolantAutomatonStates: 71, 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: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 3.5s InterpolantComputationTime, 247 NumberOfCodeBlocks, 247 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 270 ConstructedInterpolants, 3 QuantifiedInterpolants, 2151 SizeOfPredicates, 19 NumberOfNonLiveVariables, 777 ConjunctsInSsa, 73 ConjunctsInUnsatCore, 22 InterpolantComputations, 12 PerfectInterpolantSequences, 32/49 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 14 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2025-02-08 08:38:36,966 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