./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-more-buffer-series3.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-more-buffer-series3.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 c031a4ce44fce05276ee0c322906dbff86776176e55e116d257d2b83e85a253c --- Real Ultimate output --- This is Ultimate 0.3.0-?-48c9605-m [2025-02-08 08:40:30,996 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-08 08:40:31,033 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-02-08 08:40:31,037 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-08 08:40:31,037 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-08 08:40:31,050 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-08 08:40:31,051 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-08 08:40:31,051 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-08 08:40:31,051 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-08 08:40:31,051 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-08 08:40:31,051 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-08 08:40:31,051 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-08 08:40:31,052 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-08 08:40:31,052 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-08 08:40:31,052 INFO L153 SettingsManager]: * Use SBE=true [2025-02-08 08:40:31,052 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-08 08:40:31,052 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-08 08:40:31,052 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-08 08:40:31,052 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-08 08:40:31,052 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-08 08:40:31,052 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-02-08 08:40:31,053 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-02-08 08:40:31,053 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-02-08 08:40:31,053 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-08 08:40:31,053 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-02-08 08:40:31,053 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-08 08:40:31,053 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-08 08:40:31,053 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-08 08:40:31,053 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-08 08:40:31,053 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-08 08:40:31,053 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-08 08:40:31,053 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-08 08:40:31,054 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-08 08:40:31,054 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 08:40:31,054 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-08 08:40:31,054 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-08 08:40:31,054 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-08 08:40:31,054 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-08 08:40:31,054 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-08 08:40:31,054 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-08 08:40:31,054 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-08 08:40:31,054 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-08 08:40:31,054 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 -> c031a4ce44fce05276ee0c322906dbff86776176e55e116d257d2b83e85a253c [2025-02-08 08:40:31,267 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-08 08:40:31,273 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-08 08:40:31,274 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-08 08:40:31,275 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-08 08:40:31,275 INFO L274 PluginConnector]: CDTParser initialized [2025-02-08 08:40:31,276 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-buffer-series3.wvr.c [2025-02-08 08:40:32,441 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/f9e23f571/72be773d06654ef58a0ab7bd3c07e14e/FLAG4b87fd09b [2025-02-08 08:40:32,698 INFO L384 CDTParser]: Found 1 translation units. [2025-02-08 08:40:32,699 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-buffer-series3.wvr.c [2025-02-08 08:40:32,727 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/f9e23f571/72be773d06654ef58a0ab7bd3c07e14e/FLAG4b87fd09b [2025-02-08 08:40:33,020 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/f9e23f571/72be773d06654ef58a0ab7bd3c07e14e [2025-02-08 08:40:33,022 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-08 08:40:33,024 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-08 08:40:33,026 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-08 08:40:33,026 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-08 08:40:33,034 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-08 08:40:33,034 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 08:40:33" (1/1) ... [2025-02-08 08:40:33,035 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69a54597 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:40:33, skipping insertion in model container [2025-02-08 08:40:33,035 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 08:40:33" (1/1) ... [2025-02-08 08:40:33,053 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-08 08:40:33,182 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 08:40:33,185 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 08:40:33,196 INFO L200 MainTranslator]: Completed pre-run [2025-02-08 08:40:33,215 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 08:40:33,232 INFO L204 MainTranslator]: Completed translation [2025-02-08 08:40:33,233 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:40:33 WrapperNode [2025-02-08 08:40:33,233 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-08 08:40:33,234 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-08 08:40:33,234 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-08 08:40:33,234 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-08 08:40:33,243 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:40:33" (1/1) ... [2025-02-08 08:40:33,252 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:40:33" (1/1) ... [2025-02-08 08:40:33,268 INFO L138 Inliner]: procedures = 26, calls = 68, calls flagged for inlining = 23, calls inlined = 29, statements flattened = 321 [2025-02-08 08:40:33,269 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-08 08:40:33,269 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-08 08:40:33,269 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-08 08:40:33,269 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-08 08:40:33,275 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:40:33" (1/1) ... [2025-02-08 08:40:33,275 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:40:33" (1/1) ... [2025-02-08 08:40:33,278 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:40:33" (1/1) ... [2025-02-08 08:40:33,289 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2025-02-08 08:40:33,289 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:40:33" (1/1) ... [2025-02-08 08:40:33,289 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:40:33" (1/1) ... [2025-02-08 08:40:33,296 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:40:33" (1/1) ... [2025-02-08 08:40:33,301 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:40:33" (1/1) ... [2025-02-08 08:40:33,302 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:40:33" (1/1) ... [2025-02-08 08:40:33,302 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:40:33" (1/1) ... [2025-02-08 08:40:33,304 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-08 08:40:33,305 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-08 08:40:33,305 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-08 08:40:33,305 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-08 08:40:33,305 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:40:33" (1/1) ... [2025-02-08 08:40:33,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 08:40:33,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:40:33,328 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 08:40:33,332 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 08:40:33,348 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-08 08:40:33,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-08 08:40:33,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-08 08:40:33,349 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-08 08:40:33,349 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-08 08:40:33,349 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-02-08 08:40:33,349 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-02-08 08:40:33,349 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-02-08 08:40:33,349 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-02-08 08:40:33,349 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-02-08 08:40:33,349 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-02-08 08:40:33,349 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2025-02-08 08:40:33,349 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2025-02-08 08:40:33,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-08 08:40:33,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-08 08:40:33,350 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-02-08 08:40:33,350 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-02-08 08:40:33,350 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-08 08:40:33,350 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-08 08:40:33,350 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-08 08:40:33,351 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 08:40:33,430 INFO L257 CfgBuilder]: Building ICFG [2025-02-08 08:40:33,432 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-08 08:40:33,688 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L102: ~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 08:40:33,689 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L99: havoc #t~ret11#1; [2025-02-08 08:40:33,689 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L99-1: havoc #t~mem10#1; [2025-02-08 08:40:33,689 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L99-2: ~total~0 := #t~ret11#1; [2025-02-08 08:40:33,689 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L99-3: assume { :end_inline_plus } true;assume -2147483648 <= #t~ret11#1 && #t~ret11#1 <= 2147483647; [2025-02-08 08:40:33,689 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L99-4: havoc plus_#in~a#1, plus_#in~b#1; [2025-02-08 08:40:33,689 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L99-5: havoc plus_~a#1, plus_~b#1; [2025-02-08 08:40:33,689 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L99-6: #t~ret11#1 := plus_#res#1; [2025-02-08 08:40:33,689 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L104: [2025-02-08 08:40:33,689 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L100: havoc #t~post12#1; [2025-02-08 08:40:33,689 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L100-1: ~q1_front~0 := 1 + #t~post12#1; [2025-02-08 08:40:33,689 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L100-2: #t~post12#1 := ~q1_front~0; [2025-02-08 08:40:33,689 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L101: [2025-02-08 08:40:33,743 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L122: [2025-02-08 08:40:33,744 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L118: havoc #t~post15#1; [2025-02-08 08:40:33,744 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L118-1: ~q2_front~0 := 1 + #t~post15#1; [2025-02-08 08:40:33,744 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L118-2: #t~post15#1 := ~q2_front~0; [2025-02-08 08:40:33,744 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L119: [2025-02-08 08:40:33,744 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L120: ~cond~3#1 := (if 0 == (if ~j~0 < ~N~0 || ~q2_front~0 < ~q2_back~0 then 1 else 0) then 0 else 1); [2025-02-08 08:40:33,744 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L117: havoc #t~ret14#1; [2025-02-08 08:40:33,744 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L117-1: havoc #t~mem13#1; [2025-02-08 08:40:33,744 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L117-2: ~total~0 := #t~ret14#1; [2025-02-08 08:40:33,744 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L117-3: assume { :end_inline_plus } true;assume -2147483648 <= #t~ret14#1 && #t~ret14#1 <= 2147483647; [2025-02-08 08:40:33,744 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L117-4: havoc plus_#in~a#1, plus_#in~b#1; [2025-02-08 08:40:33,744 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L117-5: havoc plus_~a#1, plus_~b#1; [2025-02-08 08:40:33,744 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L117-6: #t~ret14#1 := plus_#res#1; [2025-02-08 08:40:33,916 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-08 08:40:33,917 INFO L308 CfgBuilder]: Performing block encoding [2025-02-08 08:40:34,178 WARN L149 AtomicBlockAnalyzer]: Unexpected successor node of atomic block begin: L174 is not an error location. [2025-02-08 08:40:34,178 WARN L149 AtomicBlockAnalyzer]: Unexpected successor node of atomic block begin: L174 is not an error location. [2025-02-08 08:40:34,180 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-08 08:40:34,181 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-08 08:40:34,181 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 08:40:34 BoogieIcfgContainer [2025-02-08 08:40:34,182 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-08 08:40:34,183 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-08 08:40:34,183 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-08 08:40:34,187 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-08 08:40:34,187 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.02 08:40:33" (1/3) ... [2025-02-08 08:40:34,188 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@639d2b6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 08:40:34, skipping insertion in model container [2025-02-08 08:40:34,188 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:40:33" (2/3) ... [2025-02-08 08:40:34,188 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@639d2b6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 08:40:34, skipping insertion in model container [2025-02-08 08:40:34,188 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 08:40:34" (3/3) ... [2025-02-08 08:40:34,189 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-series3.wvr.c [2025-02-08 08:40:34,201 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-08 08:40:34,202 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-buffer-series3.wvr.c that has 5 procedures, 71 locations, 1 initial locations, 7 loop locations, and 22 error locations. [2025-02-08 08:40:34,202 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-08 08:40:34,280 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2025-02-08 08:40:34,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 75 transitions, 178 flow [2025-02-08 08:40:34,350 INFO L124 PetriNetUnfolderBase]: 5/71 cut-off events. [2025-02-08 08:40:34,353 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-02-08 08:40:34,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88 conditions, 71 events. 5/71 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 205 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 59. Up to 2 conditions per place. [2025-02-08 08:40:34,358 INFO L82 GeneralOperation]: Start removeDead. Operand has 83 places, 75 transitions, 178 flow [2025-02-08 08:40:34,363 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 78 places, 70 transitions, 164 flow [2025-02-08 08:40:34,369 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-08 08:40:34,383 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;@3612ad8b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-08 08:40:34,385 INFO L334 AbstractCegarLoop]: Starting to check reachability of 40 error locations. [2025-02-08 08:40:34,388 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-08 08:40:34,389 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-02-08 08:40:34,389 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-08 08:40:34,389 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:40:34,389 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-08 08:40:34,390 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-08 08:40:34,395 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:40:34,395 INFO L85 PathProgramCache]: Analyzing trace with hash 899262, now seen corresponding path program 1 times [2025-02-08 08:40:34,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:40:34,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88437195] [2025-02-08 08:40:34,404 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:40:34,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:40:34,458 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-08 08:40:34,471 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-08 08:40:34,472 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:40:34,472 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:40:34,574 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 08:40:34,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:40:34,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88437195] [2025-02-08 08:40:34,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88437195] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:40:34,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:40:34,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-02-08 08:40:34,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903618386] [2025-02-08 08:40:34,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:40:34,585 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-08 08:40:34,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:40:34,605 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-08 08:40:34,605 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-08 08:40:34,616 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 75 [2025-02-08 08:40:34,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 70 transitions, 164 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 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 08:40:34,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:40:34,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 75 [2025-02-08 08:40:34,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:40:37,014 INFO L124 PetriNetUnfolderBase]: 22497/30708 cut-off events. [2025-02-08 08:40:37,015 INFO L125 PetriNetUnfolderBase]: For 718/718 co-relation queries the response was YES. [2025-02-08 08:40:37,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62091 conditions, 30708 events. 22497/30708 cut-off events. For 718/718 co-relation queries the response was YES. Maximal size of possible extension queue 1815. Compared 201558 event pairs, 20908 based on Foata normal form. 1/19225 useless extension candidates. Maximal degree in co-relation 59096. Up to 29848 conditions per place. [2025-02-08 08:40:37,210 INFO L140 encePairwiseOnDemand]: 67/75 looper letters, 49 selfloop transitions, 2 changer transitions 0/63 dead transitions. [2025-02-08 08:40:37,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 63 transitions, 252 flow [2025-02-08 08:40:37,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-08 08:40:37,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-08 08:40:37,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 108 transitions. [2025-02-08 08:40:37,224 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48 [2025-02-08 08:40:37,225 INFO L175 Difference]: Start difference. First operand has 78 places, 70 transitions, 164 flow. Second operand 3 states and 108 transitions. [2025-02-08 08:40:37,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 63 transitions, 252 flow [2025-02-08 08:40:37,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 63 transitions, 236 flow, removed 0 selfloop flow, removed 8 redundant places. [2025-02-08 08:40:37,374 INFO L231 Difference]: Finished difference. Result has 65 places, 63 transitions, 138 flow [2025-02-08 08:40:37,376 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=65, PETRI_TRANSITIONS=63} [2025-02-08 08:40:37,378 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, -13 predicate places. [2025-02-08 08:40:37,379 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 63 transitions, 138 flow [2025-02-08 08:40:37,379 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 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 08:40:37,379 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:40:37,379 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-08 08:40:37,379 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-08 08:40:37,379 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-08 08:40:37,380 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:40:37,380 INFO L85 PathProgramCache]: Analyzing trace with hash 899263, now seen corresponding path program 1 times [2025-02-08 08:40:37,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:40:37,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679952451] [2025-02-08 08:40:37,380 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:40:37,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:40:37,387 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-08 08:40:37,401 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-08 08:40:37,401 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:40:37,401 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:40:37,695 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 08:40:37,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:40:37,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679952451] [2025-02-08 08:40:37,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679952451] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:40:37,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:40:37,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-08 08:40:37,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878642128] [2025-02-08 08:40:37,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:40:37,696 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:40:37,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:40:37,697 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:40:37,700 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:40:37,750 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 75 [2025-02-08 08:40:37,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 63 transitions, 138 flow. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 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 08:40:37,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:40:37,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 75 [2025-02-08 08:40:37,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:40:39,760 INFO L124 PetriNetUnfolderBase]: 22498/30711 cut-off events. [2025-02-08 08:40:39,761 INFO L125 PetriNetUnfolderBase]: For 99/99 co-relation queries the response was YES. [2025-02-08 08:40:39,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61155 conditions, 30711 events. 22498/30711 cut-off events. For 99/99 co-relation queries the response was YES. Maximal size of possible extension queue 1815. Compared 201819 event pairs, 20908 based on Foata normal form. 0/19224 useless extension candidates. Maximal degree in co-relation 61118. Up to 29861 conditions per place. [2025-02-08 08:40:39,931 INFO L140 encePairwiseOnDemand]: 70/75 looper letters, 53 selfloop transitions, 4 changer transitions 0/66 dead transitions. [2025-02-08 08:40:39,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 66 transitions, 258 flow [2025-02-08 08:40:39,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 08:40:39,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 08:40:39,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 126 transitions. [2025-02-08 08:40:39,937 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42 [2025-02-08 08:40:39,937 INFO L175 Difference]: Start difference. First operand has 65 places, 63 transitions, 138 flow. Second operand 4 states and 126 transitions. [2025-02-08 08:40:39,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 66 transitions, 258 flow [2025-02-08 08:40:39,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 66 transitions, 254 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:40:39,941 INFO L231 Difference]: Finished difference. Result has 68 places, 66 transitions, 161 flow [2025-02-08 08:40:39,941 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=161, PETRI_PLACES=68, PETRI_TRANSITIONS=66} [2025-02-08 08:40:39,942 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, -10 predicate places. [2025-02-08 08:40:39,943 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 66 transitions, 161 flow [2025-02-08 08:40:39,943 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 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 08:40:39,943 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:40:39,943 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2025-02-08 08:40:39,943 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-08 08:40:39,943 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-08 08:40:39,944 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:40:39,944 INFO L85 PathProgramCache]: Analyzing trace with hash 27880444, now seen corresponding path program 1 times [2025-02-08 08:40:39,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:40:39,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143801541] [2025-02-08 08:40:39,945 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:40:39,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:40:39,957 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-02-08 08:40:39,973 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-02-08 08:40:39,973 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:40:39,973 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:40:40,151 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 08:40:40,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:40:40,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143801541] [2025-02-08 08:40:40,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143801541] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:40:40,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:40:40,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-08 08:40:40,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611843919] [2025-02-08 08:40:40,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:40:40,152 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:40:40,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:40:40,153 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:40:40,153 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-08 08:40:40,167 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 75 [2025-02-08 08:40:40,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 66 transitions, 161 flow. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 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 08:40:40,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:40:40,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 75 [2025-02-08 08:40:40,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:40:41,736 INFO L124 PetriNetUnfolderBase]: 22499/30714 cut-off events. [2025-02-08 08:40:41,736 INFO L125 PetriNetUnfolderBase]: For 99/99 co-relation queries the response was YES. [2025-02-08 08:40:41,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61172 conditions, 30714 events. 22499/30714 cut-off events. For 99/99 co-relation queries the response was YES. Maximal size of possible extension queue 1815. Compared 201819 event pairs, 20908 based on Foata normal form. 0/19226 useless extension candidates. Maximal degree in co-relation 61147. Up to 29860 conditions per place. [2025-02-08 08:40:41,857 INFO L140 encePairwiseOnDemand]: 67/75 looper letters, 53 selfloop transitions, 7 changer transitions 0/69 dead transitions. [2025-02-08 08:40:41,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 69 transitions, 287 flow [2025-02-08 08:40:41,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:40:41,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:40:41,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 146 transitions. [2025-02-08 08:40:41,858 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3893333333333333 [2025-02-08 08:40:41,859 INFO L175 Difference]: Start difference. First operand has 68 places, 66 transitions, 161 flow. Second operand 5 states and 146 transitions. [2025-02-08 08:40:41,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 69 transitions, 287 flow [2025-02-08 08:40:41,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 69 transitions, 284 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-08 08:40:41,860 INFO L231 Difference]: Finished difference. Result has 73 places, 69 transitions, 195 flow [2025-02-08 08:40:41,860 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=195, PETRI_PLACES=73, PETRI_TRANSITIONS=69} [2025-02-08 08:40:41,861 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, -5 predicate places. [2025-02-08 08:40:41,861 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 69 transitions, 195 flow [2025-02-08 08:40:41,861 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 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 08:40:41,861 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:40:41,861 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2025-02-08 08:40:41,861 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-02-08 08:40:41,861 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-08 08:40:41,862 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:40:41,862 INFO L85 PathProgramCache]: Analyzing trace with hash 864220340, now seen corresponding path program 1 times [2025-02-08 08:40:41,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:40:41,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114082673] [2025-02-08 08:40:41,862 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:40:41,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:40:41,867 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-08 08:40:41,873 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-08 08:40:41,873 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:40:41,873 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:40:42,019 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 08:40:42,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:40:42,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114082673] [2025-02-08 08:40:42,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114082673] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:40:42,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377880995] [2025-02-08 08:40:42,020 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:40:42,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:40:42,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:40:42,022 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 08:40:42,024 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 08:40:42,067 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-08 08:40:42,076 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-08 08:40:42,076 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:40:42,076 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:40:42,077 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-08 08:40:42,082 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:40:42,131 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 08:40:42,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:40:42,299 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:40:42,391 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 08:40:42,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377880995] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:40:42,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:40:42,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2025-02-08 08:40:42,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112188008] [2025-02-08 08:40:42,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:40:42,392 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-08 08:40:42,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:40:42,393 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-08 08:40:42,393 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2025-02-08 08:40:42,464 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 75 [2025-02-08 08:40:42,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 69 transitions, 195 flow. Second operand has 11 states, 11 states have (on average 18.363636363636363) internal successors, (202), 11 states have internal predecessors, (202), 0 states have call successors, (0), 0 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 08:40:42,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:40:42,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 75 [2025-02-08 08:40:42,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:40:44,668 INFO L124 PetriNetUnfolderBase]: 22499/30713 cut-off events. [2025-02-08 08:40:44,668 INFO L125 PetriNetUnfolderBase]: For 102/102 co-relation queries the response was YES. [2025-02-08 08:40:44,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61185 conditions, 30713 events. 22499/30713 cut-off events. For 102/102 co-relation queries the response was YES. Maximal size of possible extension queue 1818. Compared 202138 event pairs, 20908 based on Foata normal form. 0/19228 useless extension candidates. Maximal degree in co-relation 61157. Up to 29860 conditions per place. [2025-02-08 08:40:44,799 INFO L140 encePairwiseOnDemand]: 70/75 looper letters, 52 selfloop transitions, 7 changer transitions 0/68 dead transitions. [2025-02-08 08:40:44,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 68 transitions, 309 flow [2025-02-08 08:40:44,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-08 08:40:44,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-08 08:40:44,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2025-02-08 08:40:44,801 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35333333333333333 [2025-02-08 08:40:44,801 INFO L175 Difference]: Start difference. First operand has 73 places, 69 transitions, 195 flow. Second operand 6 states and 159 transitions. [2025-02-08 08:40:44,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 68 transitions, 309 flow [2025-02-08 08:40:44,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 68 transitions, 308 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-08 08:40:44,802 INFO L231 Difference]: Finished difference. Result has 76 places, 68 transitions, 204 flow [2025-02-08 08:40:44,803 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=204, PETRI_PLACES=76, PETRI_TRANSITIONS=68} [2025-02-08 08:40:44,803 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, -2 predicate places. [2025-02-08 08:40:44,803 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 68 transitions, 204 flow [2025-02-08 08:40:44,803 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 18.363636363636363) internal successors, (202), 11 states have internal predecessors, (202), 0 states have call successors, (0), 0 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 08:40:44,803 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:40:44,804 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2025-02-08 08:40:44,813 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 08:40:45,008 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 08:40:45,008 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-08 08:40:45,009 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:40:45,009 INFO L85 PathProgramCache]: Analyzing trace with hash 864294065, now seen corresponding path program 1 times [2025-02-08 08:40:45,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:40:45,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800253072] [2025-02-08 08:40:45,009 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:40:45,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:40:45,014 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-08 08:40:45,021 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-08 08:40:45,022 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:40:45,022 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:40:45,141 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 08:40:45,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:40:45,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800253072] [2025-02-08 08:40:45,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800253072] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:40:45,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:40:45,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-08 08:40:45,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000354588] [2025-02-08 08:40:45,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:40:45,142 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:40:45,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:40:45,142 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:40:45,142 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-08 08:40:45,167 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 75 [2025-02-08 08:40:45,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 68 transitions, 204 flow. Second operand has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 0 states have call successors, (0), 0 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 08:40:45,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:40:45,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 75 [2025-02-08 08:40:45,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:40:46,753 INFO L124 PetriNetUnfolderBase]: 22500/30716 cut-off events. [2025-02-08 08:40:46,753 INFO L125 PetriNetUnfolderBase]: For 102/102 co-relation queries the response was YES. [2025-02-08 08:40:46,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61198 conditions, 30716 events. 22500/30716 cut-off events. For 102/102 co-relation queries the response was YES. Maximal size of possible extension queue 1818. Compared 202220 event pairs, 20908 based on Foata normal form. 0/19230 useless extension candidates. Maximal degree in co-relation 61165. Up to 29862 conditions per place. [2025-02-08 08:40:46,894 INFO L140 encePairwiseOnDemand]: 66/75 looper letters, 53 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2025-02-08 08:40:46,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 71 transitions, 334 flow [2025-02-08 08:40:46,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:40:46,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:40:46,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 145 transitions. [2025-02-08 08:40:46,895 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38666666666666666 [2025-02-08 08:40:46,895 INFO L175 Difference]: Start difference. First operand has 76 places, 68 transitions, 204 flow. Second operand 5 states and 145 transitions. [2025-02-08 08:40:46,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 71 transitions, 334 flow [2025-02-08 08:40:46,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 71 transitions, 300 flow, removed 3 selfloop flow, removed 8 redundant places. [2025-02-08 08:40:46,897 INFO L231 Difference]: Finished difference. Result has 74 places, 71 transitions, 213 flow [2025-02-08 08:40:46,897 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=213, PETRI_PLACES=74, PETRI_TRANSITIONS=71} [2025-02-08 08:40:46,898 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, -4 predicate places. [2025-02-08 08:40:46,898 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 71 transitions, 213 flow [2025-02-08 08:40:46,898 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 0 states have call successors, (0), 0 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 08:40:46,898 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:40:46,898 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2025-02-08 08:40:46,898 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-02-08 08:40:46,898 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-08 08:40:46,899 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:40:46,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1023331650, now seen corresponding path program 1 times [2025-02-08 08:40:46,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:40:46,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225474167] [2025-02-08 08:40:46,899 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:40:46,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:40:46,904 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-08 08:40:46,909 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-08 08:40:46,909 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:40:46,909 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:40:47,062 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 08:40:47,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:40:47,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225474167] [2025-02-08 08:40:47,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225474167] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:40:47,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501402878] [2025-02-08 08:40:47,062 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:40:47,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:40:47,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:40:47,067 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 08:40:47,067 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 08:40:47,110 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-08 08:40:47,122 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-08 08:40:47,122 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:40:47,122 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:40:47,123 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-08 08:40:47,124 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:40:47,283 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-02-08 08:40:47,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:40:47,370 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:40:47,483 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 08:40:47,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501402878] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:40:47,483 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:40:47,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2025-02-08 08:40:47,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914309228] [2025-02-08 08:40:47,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:40:47,484 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-08 08:40:47,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:40:47,484 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-08 08:40:47,484 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2025-02-08 08:40:47,592 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 75 [2025-02-08 08:40:47,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 71 transitions, 213 flow. Second operand has 13 states, 13 states have (on average 18.307692307692307) internal successors, (238), 13 states have internal predecessors, (238), 0 states have call successors, (0), 0 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 08:40:47,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:40:47,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 75 [2025-02-08 08:40:47,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:40:49,911 INFO L124 PetriNetUnfolderBase]: 22500/30715 cut-off events. [2025-02-08 08:40:49,912 INFO L125 PetriNetUnfolderBase]: For 104/104 co-relation queries the response was YES. [2025-02-08 08:40:49,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61196 conditions, 30715 events. 22500/30715 cut-off events. For 104/104 co-relation queries the response was YES. Maximal size of possible extension queue 1815. Compared 201847 event pairs, 20908 based on Foata normal form. 0/19232 useless extension candidates. Maximal degree in co-relation 61154. Up to 29855 conditions per place. [2025-02-08 08:40:50,027 INFO L140 encePairwiseOnDemand]: 67/75 looper letters, 49 selfloop transitions, 12 changer transitions 0/70 dead transitions. [2025-02-08 08:40:50,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 70 transitions, 331 flow [2025-02-08 08:40:50,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-08 08:40:50,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-08 08:40:50,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2025-02-08 08:40:50,032 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.33904761904761904 [2025-02-08 08:40:50,033 INFO L175 Difference]: Start difference. First operand has 74 places, 71 transitions, 213 flow. Second operand 7 states and 178 transitions. [2025-02-08 08:40:50,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 70 transitions, 331 flow [2025-02-08 08:40:50,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 70 transitions, 324 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:40:50,034 INFO L231 Difference]: Finished difference. Result has 77 places, 70 transitions, 226 flow [2025-02-08 08:40:50,034 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=226, PETRI_PLACES=77, PETRI_TRANSITIONS=70} [2025-02-08 08:40:50,034 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, -1 predicate places. [2025-02-08 08:40:50,035 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 70 transitions, 226 flow [2025-02-08 08:40:50,035 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 18.307692307692307) internal successors, (238), 13 states have internal predecessors, (238), 0 states have call successors, (0), 0 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 08:40:50,035 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:40:50,035 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2025-02-08 08:40:50,044 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 08:40:50,239 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:40:50,239 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-08 08:40:50,240 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:40:50,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1657935701, now seen corresponding path program 1 times [2025-02-08 08:40:50,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:40:50,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001110482] [2025-02-08 08:40:50,240 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:40:50,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:40:50,247 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-02-08 08:40:50,255 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-02-08 08:40:50,256 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:40:50,256 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:40:50,445 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:40:50,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:40:50,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001110482] [2025-02-08 08:40:50,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001110482] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:40:50,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718452019] [2025-02-08 08:40:50,446 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:40:50,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:40:50,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:40:50,448 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 08:40:50,451 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 08:40:50,496 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-02-08 08:40:50,509 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-02-08 08:40:50,509 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:40:50,509 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:40:50,510 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-08 08:40:50,511 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:40:50,522 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 08:40:50,630 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:40:50,630 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:40:50,746 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:40:50,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718452019] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:40:50,746 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:40:50,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2025-02-08 08:40:50,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201655654] [2025-02-08 08:40:50,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:40:50,747 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-08 08:40:50,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:40:50,747 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-08 08:40:50,747 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2025-02-08 08:40:50,847 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 75 [2025-02-08 08:40:50,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 70 transitions, 226 flow. Second operand has 13 states, 13 states have (on average 18.46153846153846) internal successors, (240), 13 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:40:50,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:40:50,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 75 [2025-02-08 08:40:50,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:40:52,363 INFO L124 PetriNetUnfolderBase]: 22500/30714 cut-off events. [2025-02-08 08:40:52,363 INFO L125 PetriNetUnfolderBase]: For 105/105 co-relation queries the response was YES. [2025-02-08 08:40:52,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61201 conditions, 30714 events. 22500/30714 cut-off events. For 105/105 co-relation queries the response was YES. Maximal size of possible extension queue 1818. Compared 201950 event pairs, 20908 based on Foata normal form. 0/19232 useless extension candidates. Maximal degree in co-relation 61156. Up to 29854 conditions per place. [2025-02-08 08:40:52,585 INFO L140 encePairwiseOnDemand]: 66/75 looper letters, 45 selfloop transitions, 15 changer transitions 0/69 dead transitions. [2025-02-08 08:40:52,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 69 transitions, 342 flow [2025-02-08 08:40:52,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-08 08:40:52,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-08 08:40:52,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2025-02-08 08:40:52,587 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.33714285714285713 [2025-02-08 08:40:52,587 INFO L175 Difference]: Start difference. First operand has 77 places, 70 transitions, 226 flow. Second operand 7 states and 177 transitions. [2025-02-08 08:40:52,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 69 transitions, 342 flow [2025-02-08 08:40:52,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 69 transitions, 317 flow, removed 3 selfloop flow, removed 5 redundant places. [2025-02-08 08:40:52,589 INFO L231 Difference]: Finished difference. Result has 77 places, 69 transitions, 227 flow [2025-02-08 08:40:52,589 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=227, PETRI_PLACES=77, PETRI_TRANSITIONS=69} [2025-02-08 08:40:52,589 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, -1 predicate places. [2025-02-08 08:40:52,589 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 69 transitions, 227 flow [2025-02-08 08:40:52,590 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 18.46153846153846) internal successors, (240), 13 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:40:52,590 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:40:52,590 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:40:52,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-02-08 08:40:52,794 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:40:52,794 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-08 08:40:52,794 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:40:52,794 INFO L85 PathProgramCache]: Analyzing trace with hash -39438798, now seen corresponding path program 1 times [2025-02-08 08:40:52,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:40:52,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064121890] [2025-02-08 08:40:52,795 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:40:52,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:40:52,801 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-08 08:40:52,808 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-08 08:40:52,808 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:40:52,808 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:40:52,863 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 08:40:52,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:40:52,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064121890] [2025-02-08 08:40:52,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064121890] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:40:52,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:40:52,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-08 08:40:52,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674015114] [2025-02-08 08:40:52,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:40:52,864 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:40:52,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:40:52,865 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:40:52,865 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:40:52,869 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 75 [2025-02-08 08:40:52,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 69 transitions, 227 flow. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 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 08:40:52,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:40:52,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 75 [2025-02-08 08:40:52,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:40:54,719 INFO L124 PetriNetUnfolderBase]: 26005/35755 cut-off events. [2025-02-08 08:40:54,720 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2025-02-08 08:40:54,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71274 conditions, 35755 events. 26005/35755 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 1975. Compared 238722 event pairs, 24260 based on Foata normal form. 808/24107 useless extension candidates. Maximal degree in co-relation 61156. Up to 29863 conditions per place. [2025-02-08 08:40:54,918 INFO L140 encePairwiseOnDemand]: 60/75 looper letters, 96 selfloop transitions, 7 changer transitions 0/112 dead transitions. [2025-02-08 08:40:54,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 112 transitions, 573 flow [2025-02-08 08:40:54,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:40:54,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:40:54,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 205 transitions. [2025-02-08 08:40:54,920 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5466666666666666 [2025-02-08 08:40:54,920 INFO L175 Difference]: Start difference. First operand has 77 places, 69 transitions, 227 flow. Second operand 5 states and 205 transitions. [2025-02-08 08:40:54,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 112 transitions, 573 flow [2025-02-08 08:40:54,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 112 transitions, 516 flow, removed 6 selfloop flow, removed 6 redundant places. [2025-02-08 08:40:54,923 INFO L231 Difference]: Finished difference. Result has 77 places, 73 transitions, 255 flow [2025-02-08 08:40:54,923 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=255, PETRI_PLACES=77, PETRI_TRANSITIONS=73} [2025-02-08 08:40:54,926 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, -1 predicate places. [2025-02-08 08:40:54,926 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 73 transitions, 255 flow [2025-02-08 08:40:54,926 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 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 08:40:54,926 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:40:54,927 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:40:54,927 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-02-08 08:40:54,927 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-08 08:40:54,927 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:40:54,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1252399510, now seen corresponding path program 1 times [2025-02-08 08:40:54,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:40:54,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086179396] [2025-02-08 08:40:54,928 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:40:54,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:40:54,933 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-08 08:40:54,941 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-08 08:40:54,944 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:40:54,944 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:40:55,047 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 08:40:55,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:40:55,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086179396] [2025-02-08 08:40:55,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086179396] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:40:55,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:40:55,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-08 08:40:55,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874489184] [2025-02-08 08:40:55,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:40:55,048 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-08 08:40:55,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:40:55,048 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-08 08:40:55,048 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-02-08 08:40:55,056 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 75 [2025-02-08 08:40:55,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 73 transitions, 255 flow. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 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 08:40:55,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:40:55,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 75 [2025-02-08 08:40:55,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:40:59,271 INFO L124 PetriNetUnfolderBase]: 58098/78809 cut-off events. [2025-02-08 08:40:59,272 INFO L125 PetriNetUnfolderBase]: For 2755/2755 co-relation queries the response was YES. [2025-02-08 08:40:59,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174175 conditions, 78809 events. 58098/78809 cut-off events. For 2755/2755 co-relation queries the response was YES. Maximal size of possible extension queue 3486. Compared 547905 event pairs, 20576 based on Foata normal form. 0/50879 useless extension candidates. Maximal degree in co-relation 151014. Up to 26153 conditions per place. [2025-02-08 08:40:59,692 INFO L140 encePairwiseOnDemand]: 67/75 looper letters, 203 selfloop transitions, 12 changer transitions 0/223 dead transitions. [2025-02-08 08:40:59,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 223 transitions, 1049 flow [2025-02-08 08:40:59,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-08 08:40:59,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-08 08:40:59,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 358 transitions. [2025-02-08 08:40:59,694 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5966666666666667 [2025-02-08 08:40:59,694 INFO L175 Difference]: Start difference. First operand has 77 places, 73 transitions, 255 flow. Second operand 8 states and 358 transitions. [2025-02-08 08:40:59,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 223 transitions, 1049 flow [2025-02-08 08:40:59,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 223 transitions, 1044 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:40:59,707 INFO L231 Difference]: Finished difference. Result has 85 places, 77 transitions, 304 flow [2025-02-08 08:40:59,709 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=304, PETRI_PLACES=85, PETRI_TRANSITIONS=77} [2025-02-08 08:40:59,709 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 7 predicate places. [2025-02-08 08:40:59,711 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 77 transitions, 304 flow [2025-02-08 08:40:59,711 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 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 08:40:59,711 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:40:59,711 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:40:59,711 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-02-08 08:40:59,711 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-08 08:40:59,712 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:40:59,712 INFO L85 PathProgramCache]: Analyzing trace with hash 766331008, now seen corresponding path program 1 times [2025-02-08 08:40:59,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:40:59,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697209327] [2025-02-08 08:40:59,712 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:40:59,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:40:59,719 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-08 08:40:59,729 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-08 08:40:59,729 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:40:59,729 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:40:59,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:40:59,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:40:59,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697209327] [2025-02-08 08:40:59,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697209327] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:40:59,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:40:59,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-08 08:40:59,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53398319] [2025-02-08 08:40:59,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:40:59,830 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:40:59,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:40:59,831 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:40:59,831 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:40:59,843 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 75 [2025-02-08 08:40:59,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 77 transitions, 304 flow. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 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 08:40:59,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:40:59,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 75 [2025-02-08 08:40:59,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:03,597 INFO L124 PetriNetUnfolderBase]: 42132/58417 cut-off events. [2025-02-08 08:41:03,597 INFO L125 PetriNetUnfolderBase]: For 13664/13664 co-relation queries the response was YES. [2025-02-08 08:41:03,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137354 conditions, 58417 events. 42132/58417 cut-off events. For 13664/13664 co-relation queries the response was YES. Maximal size of possible extension queue 2589. Compared 412558 event pairs, 39651 based on Foata normal form. 0/41391 useless extension candidates. Maximal degree in co-relation 117281. Up to 56629 conditions per place.