./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/chl-nzb-file-trans.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/chl-nzb-file-trans.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 0d0975dc4466296431d96c26938a2e71864de63aba998f18ecd8a32ca341796b --- Real Ultimate output --- This is Ultimate 0.3.0-?-48c9605-m [2025-02-08 08:35:18,116 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-08 08:35:18,153 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-02-08 08:35:18,156 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-08 08:35:18,157 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-08 08:35:18,172 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-08 08:35:18,173 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-08 08:35:18,173 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-08 08:35:18,173 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-08 08:35:18,173 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-08 08:35:18,174 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-08 08:35:18,174 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-08 08:35:18,174 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-08 08:35:18,174 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-08 08:35:18,174 INFO L153 SettingsManager]: * Use SBE=true [2025-02-08 08:35:18,174 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-08 08:35:18,174 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-08 08:35:18,174 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-08 08:35:18,175 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-08 08:35:18,175 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-08 08:35:18,175 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-02-08 08:35:18,175 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-02-08 08:35:18,175 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-02-08 08:35:18,175 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-08 08:35:18,175 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-02-08 08:35:18,175 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-08 08:35:18,175 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-08 08:35:18,175 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-08 08:35:18,175 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-08 08:35:18,175 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-08 08:35:18,176 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-08 08:35:18,176 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-08 08:35:18,176 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-08 08:35:18,176 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 08:35:18,176 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-08 08:35:18,176 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-08 08:35:18,176 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-08 08:35:18,176 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-08 08:35:18,176 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-08 08:35:18,176 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-08 08:35:18,177 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-08 08:35:18,177 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-08 08:35:18,177 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 -> 0d0975dc4466296431d96c26938a2e71864de63aba998f18ecd8a32ca341796b [2025-02-08 08:35:18,400 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-08 08:35:18,406 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-08 08:35:18,408 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-08 08:35:18,409 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-08 08:35:18,409 INFO L274 PluginConnector]: CDTParser initialized [2025-02-08 08:35:18,410 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-nzb-file-trans.wvr.c [2025-02-08 08:35:19,685 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/ce00c3acc/2040aed5fb5a42c4ac05a9648c1a30f1/FLAG68ad453e7 [2025-02-08 08:35:19,933 INFO L384 CDTParser]: Found 1 translation units. [2025-02-08 08:35:19,933 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/chl-nzb-file-trans.wvr.c [2025-02-08 08:35:19,939 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/ce00c3acc/2040aed5fb5a42c4ac05a9648c1a30f1/FLAG68ad453e7 [2025-02-08 08:35:19,949 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/ce00c3acc/2040aed5fb5a42c4ac05a9648c1a30f1 [2025-02-08 08:35:19,955 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-08 08:35:19,956 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-08 08:35:19,958 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-08 08:35:19,959 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-08 08:35:19,963 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-08 08:35:19,963 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 08:35:19" (1/1) ... [2025-02-08 08:35:19,964 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e159f38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:35:19, skipping insertion in model container [2025-02-08 08:35:19,964 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 08:35:19" (1/1) ... [2025-02-08 08:35:19,981 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-08 08:35:20,150 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 08:35:20,154 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 08:35:20,168 INFO L200 MainTranslator]: Completed pre-run [2025-02-08 08:35:20,218 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 08:35:20,233 INFO L204 MainTranslator]: Completed translation [2025-02-08 08:35:20,234 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:35:20 WrapperNode [2025-02-08 08:35:20,234 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-08 08:35:20,235 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-08 08:35:20,235 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-08 08:35:20,235 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-08 08:35:20,243 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:35:20" (1/1) ... [2025-02-08 08:35:20,255 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:35:20" (1/1) ... [2025-02-08 08:35:20,279 INFO L138 Inliner]: procedures = 25, calls = 62, calls flagged for inlining = 29, calls inlined = 43, statements flattened = 593 [2025-02-08 08:35:20,280 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-08 08:35:20,280 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-08 08:35:20,280 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-08 08:35:20,281 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-08 08:35:20,287 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:35:20" (1/1) ... [2025-02-08 08:35:20,287 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:35:20" (1/1) ... [2025-02-08 08:35:20,291 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:35:20" (1/1) ... [2025-02-08 08:35:20,304 INFO L175 MemorySlicer]: Split 29 memory accesses to 2 slices as follows [2, 27]. 93 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 08:35:20,305 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:35:20" (1/1) ... [2025-02-08 08:35:20,305 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:35:20" (1/1) ... [2025-02-08 08:35:20,315 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:35:20" (1/1) ... [2025-02-08 08:35:20,316 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:35:20" (1/1) ... [2025-02-08 08:35:20,318 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:35:20" (1/1) ... [2025-02-08 08:35:20,319 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:35:20" (1/1) ... [2025-02-08 08:35:20,322 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-08 08:35:20,322 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-08 08:35:20,322 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-08 08:35:20,323 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-08 08:35:20,323 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:35:20" (1/1) ... [2025-02-08 08:35:20,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 08:35:20,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:35:20,349 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 08:35:20,351 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 08:35:20,367 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-08 08:35:20,367 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-02-08 08:35:20,367 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-02-08 08:35:20,367 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-02-08 08:35:20,367 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-02-08 08:35:20,367 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-02-08 08:35:20,367 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-02-08 08:35:20,367 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-08 08:35:20,367 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-08 08:35:20,367 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-08 08:35:20,367 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-08 08:35:20,367 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-08 08:35:20,367 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-08 08:35:20,367 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-08 08:35:20,367 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-08 08:35:20,367 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-08 08:35:20,369 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 08:35:20,483 INFO L257 CfgBuilder]: Building ICFG [2025-02-08 08:35:20,485 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-08 08:35:20,717 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L69-5: #t~ite21#1 := #t~ret20#1; [2025-02-08 08:35:20,718 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L69-6: assume { :end_inline_minus } true;assume -2147483648 <= #t~ret20#1 && #t~ret20#1 <= 2147483647; [2025-02-08 08:35:20,718 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L69-7: havoc minus_#in~a#1, minus_#in~b#1; [2025-02-08 08:35:20,718 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L69-8: havoc minus_~a#1, minus_~b#1; [2025-02-08 08:35:20,718 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L69-9: #t~ret20#1 := minus_#res#1; [2025-02-08 08:35:20,718 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L65-3: #t~ite19#1 := #t~ret18#1; [2025-02-08 08:35:20,718 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L65-4: assume { :end_inline_minus } true;assume -2147483648 <= #t~ret18#1 && #t~ret18#1 <= 2147483647; [2025-02-08 08:35:20,718 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L65-5: havoc minus_#in~a#1, minus_#in~b#1; [2025-02-08 08:35:20,718 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L65-6: havoc minus_~a#1, minus_~b#1; [2025-02-08 08:35:20,718 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L65-7: #t~ret18#1 := minus_#res#1; [2025-02-08 08:35:20,868 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L96-5: #t~ite43#1 := #t~ret42#1; [2025-02-08 08:35:20,868 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L96-6: assume { :end_inline_minus } true;assume -2147483648 <= #t~ret42#1 && #t~ret42#1 <= 2147483647; [2025-02-08 08:35:20,868 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L96-7: havoc minus_#in~a#1, minus_#in~b#1; [2025-02-08 08:35:20,868 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L96-8: havoc minus_~a#1, minus_~b#1; [2025-02-08 08:35:20,868 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L96-9: #t~ret42#1 := minus_#res#1; [2025-02-08 08:35:20,868 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L92-3: #t~ite41#1 := #t~ret40#1; [2025-02-08 08:35:20,868 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L92-4: assume { :end_inline_minus } true;assume -2147483648 <= #t~ret40#1 && #t~ret40#1 <= 2147483647; [2025-02-08 08:35:20,868 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L92-5: havoc minus_#in~a#1, minus_#in~b#1; [2025-02-08 08:35:20,869 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L92-6: havoc minus_~a#1, minus_~b#1; [2025-02-08 08:35:20,869 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L92-7: #t~ret40#1 := minus_#res#1; [2025-02-08 08:35:20,982 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L119-3: #t~ite63#1 := #t~ret62#1; [2025-02-08 08:35:20,982 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L119-4: assume { :end_inline_minus } true;assume -2147483648 <= #t~ret62#1 && #t~ret62#1 <= 2147483647; [2025-02-08 08:35:20,982 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L119-5: havoc minus_#in~a#1, minus_#in~b#1; [2025-02-08 08:35:20,982 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L119-6: havoc minus_~a#1, minus_~b#1; [2025-02-08 08:35:20,982 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L119-7: #t~ret62#1 := minus_#res#1; [2025-02-08 08:35:20,982 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L123-5: #t~ite65#1 := #t~ret64#1; [2025-02-08 08:35:20,982 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L123-6: assume { :end_inline_minus } true;assume -2147483648 <= #t~ret64#1 && #t~ret64#1 <= 2147483647; [2025-02-08 08:35:20,983 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L123-7: havoc minus_#in~a#1, minus_#in~b#1; [2025-02-08 08:35:20,983 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L123-8: havoc minus_~a#1, minus_~b#1; [2025-02-08 08:35:20,983 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L123-9: #t~ret64#1 := minus_#res#1; [2025-02-08 08:35:21,115 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-08 08:35:21,115 INFO L308 CfgBuilder]: Performing block encoding [2025-02-08 08:35:21,430 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-08 08:35:21,430 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-08 08:35:21,431 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 08:35:21 BoogieIcfgContainer [2025-02-08 08:35:21,431 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-08 08:35:21,432 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-08 08:35:21,432 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-08 08:35:21,435 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-08 08:35:21,435 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.02 08:35:19" (1/3) ... [2025-02-08 08:35:21,436 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@429e9ef7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 08:35:21, skipping insertion in model container [2025-02-08 08:35:21,436 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:35:20" (2/3) ... [2025-02-08 08:35:21,436 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@429e9ef7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 08:35:21, skipping insertion in model container [2025-02-08 08:35:21,436 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 08:35:21" (3/3) ... [2025-02-08 08:35:21,437 INFO L128 eAbstractionObserver]: Analyzing ICFG chl-nzb-file-trans.wvr.c [2025-02-08 08:35:21,448 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-08 08:35:21,449 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG chl-nzb-file-trans.wvr.c that has 4 procedures, 175 locations, 1 initial locations, 6 loop locations, and 56 error locations. [2025-02-08 08:35:21,449 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-08 08:35:21,578 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2025-02-08 08:35:21,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 184 places, 207 transitions, 435 flow [2025-02-08 08:35:21,646 INFO L124 PetriNetUnfolderBase]: 33/204 cut-off events. [2025-02-08 08:35:21,648 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-02-08 08:35:21,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217 conditions, 204 events. 33/204 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 848 event pairs, 0 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 183. Up to 2 conditions per place. [2025-02-08 08:35:21,653 INFO L82 GeneralOperation]: Start removeDead. Operand has 184 places, 207 transitions, 435 flow [2025-02-08 08:35:21,658 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 180 places, 203 transitions, 424 flow [2025-02-08 08:35:21,663 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-08 08:35:21,674 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;@15dcce0a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-08 08:35:21,674 INFO L334 AbstractCegarLoop]: Starting to check reachability of 107 error locations. [2025-02-08 08:35:21,678 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-08 08:35:21,678 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-02-08 08:35:21,678 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-08 08:35:21,678 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:35:21,679 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-08 08:35:21,679 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 104 more)] === [2025-02-08 08:35:21,682 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:35:21,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1666446, now seen corresponding path program 1 times [2025-02-08 08:35:21,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:35:21,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849900575] [2025-02-08 08:35:21,688 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:35:21,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:35:21,740 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-08 08:35:21,771 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-08 08:35:21,771 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:35:21,771 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:35:21,940 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 08:35:21,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:35:21,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849900575] [2025-02-08 08:35:21,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849900575] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:35:21,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:35:21,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-02-08 08:35:21,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337060024] [2025-02-08 08:35:21,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:35:21,949 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-08 08:35:21,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:35:21,967 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-08 08:35:21,968 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-08 08:35:22,033 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 207 [2025-02-08 08:35:22,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 203 transitions, 424 flow. Second operand has 3 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 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 08:35:22,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:35:22,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 207 [2025-02-08 08:35:22,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:35:30,854 INFO L124 PetriNetUnfolderBase]: 92555/165117 cut-off events. [2025-02-08 08:35:30,854 INFO L125 PetriNetUnfolderBase]: For 1916/1916 co-relation queries the response was YES. [2025-02-08 08:35:31,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285771 conditions, 165117 events. 92555/165117 cut-off events. For 1916/1916 co-relation queries the response was YES. Maximal size of possible extension queue 4488. Compared 1700160 event pairs, 58269 based on Foata normal form. 1/128011 useless extension candidates. Maximal degree in co-relation 280724. Up to 119155 conditions per place. [2025-02-08 08:35:31,960 INFO L140 encePairwiseOnDemand]: 198/207 looper letters, 102 selfloop transitions, 2 changer transitions 0/195 dead transitions. [2025-02-08 08:35:31,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 195 transitions, 616 flow [2025-02-08 08:35:31,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-08 08:35:31,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-08 08:35:31,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 396 transitions. [2025-02-08 08:35:31,972 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6376811594202898 [2025-02-08 08:35:31,973 INFO L175 Difference]: Start difference. First operand has 180 places, 203 transitions, 424 flow. Second operand 3 states and 396 transitions. [2025-02-08 08:35:31,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 195 transitions, 616 flow [2025-02-08 08:35:31,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 195 transitions, 604 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-02-08 08:35:31,996 INFO L231 Difference]: Finished difference. Result has 171 places, 195 transitions, 400 flow [2025-02-08 08:35:31,998 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=207, PETRI_DIFFERENCE_MINUEND_FLOW=396, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=400, PETRI_PLACES=171, PETRI_TRANSITIONS=195} [2025-02-08 08:35:32,000 INFO L279 CegarLoopForPetriNet]: 180 programPoint places, -9 predicate places. [2025-02-08 08:35:32,000 INFO L471 AbstractCegarLoop]: Abstraction has has 171 places, 195 transitions, 400 flow [2025-02-08 08:35:32,001 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 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 08:35:32,001 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:35:32,001 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-08 08:35:32,001 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-08 08:35:32,001 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 104 more)] === [2025-02-08 08:35:32,002 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:35:32,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1666447, now seen corresponding path program 1 times [2025-02-08 08:35:32,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:35:32,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358180953] [2025-02-08 08:35:32,002 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:35:32,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:35:32,013 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-08 08:35:32,052 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-08 08:35:32,053 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:35:32,053 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:35:32,261 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 08:35:32,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:35:32,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358180953] [2025-02-08 08:35:32,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358180953] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:35:32,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:35:32,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-08 08:35:32,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9624409] [2025-02-08 08:35:32,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:35:32,263 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:35:32,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:35:32,264 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:35:32,265 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:35:32,356 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 207 [2025-02-08 08:35:32,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 195 transitions, 400 flow. Second operand has 4 states, 4 states have (on average 95.75) internal successors, (383), 4 states have internal predecessors, (383), 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 08:35:32,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:35:32,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 207 [2025-02-08 08:35:32,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:35:40,691 INFO L124 PetriNetUnfolderBase]: 92558/165126 cut-off events. [2025-02-08 08:35:40,692 INFO L125 PetriNetUnfolderBase]: For 466/466 co-relation queries the response was YES. [2025-02-08 08:35:41,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 284802 conditions, 165126 events. 92558/165126 cut-off events. For 466/466 co-relation queries the response was YES. Maximal size of possible extension queue 4489. Compared 1700481 event pairs, 58269 based on Foata normal form. 0/128015 useless extension candidates. Maximal degree in co-relation 284752. Up to 119168 conditions per place. [2025-02-08 08:35:41,858 INFO L140 encePairwiseOnDemand]: 197/207 looper letters, 109 selfloop transitions, 7 changer transitions 0/204 dead transitions. [2025-02-08 08:35:41,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 204 transitions, 652 flow [2025-02-08 08:35:41,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-08 08:35:41,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-08 08:35:41,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 404 transitions. [2025-02-08 08:35:41,861 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6505636070853462 [2025-02-08 08:35:41,862 INFO L175 Difference]: Start difference. First operand has 171 places, 195 transitions, 400 flow. Second operand 3 states and 404 transitions. [2025-02-08 08:35:41,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 204 transitions, 652 flow [2025-02-08 08:35:41,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 204 transitions, 646 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:35:41,871 INFO L231 Difference]: Finished difference. Result has 173 places, 201 transitions, 454 flow [2025-02-08 08:35:41,871 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=207, PETRI_DIFFERENCE_MINUEND_FLOW=396, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=454, PETRI_PLACES=173, PETRI_TRANSITIONS=201} [2025-02-08 08:35:41,872 INFO L279 CegarLoopForPetriNet]: 180 programPoint places, -7 predicate places. [2025-02-08 08:35:41,872 INFO L471 AbstractCegarLoop]: Abstraction has has 173 places, 201 transitions, 454 flow [2025-02-08 08:35:41,872 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 95.75) internal successors, (383), 4 states have internal predecessors, (383), 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 08:35:41,872 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:35:41,872 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2025-02-08 08:35:41,873 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-08 08:35:41,873 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 104 more)] === [2025-02-08 08:35:41,873 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:35:41,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1601503690, now seen corresponding path program 1 times [2025-02-08 08:35:41,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:35:41,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500942677] [2025-02-08 08:35:41,873 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:35:41,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:35:41,882 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-08 08:35:41,892 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-08 08:35:41,892 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:35:41,892 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:35:42,096 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 08:35:42,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:35:42,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500942677] [2025-02-08 08:35:42,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500942677] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:35:42,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159469388] [2025-02-08 08:35:42,097 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:35:42,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:35:42,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:35:42,104 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 08:35:42,105 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 08:35:42,175 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-08 08:35:42,188 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-08 08:35:42,188 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:35:42,188 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:35:42,193 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-02-08 08:35:42,196 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:35:42,237 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-02-08 08:35:42,287 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 08:35:42,288 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:35:42,351 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 08:35:42,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159469388] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:35:42,352 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:35:42,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2025-02-08 08:35:42,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964993273] [2025-02-08 08:35:42,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:35:42,352 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-02-08 08:35:42,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:35:42,353 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-02-08 08:35:42,353 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2025-02-08 08:35:42,642 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 207 [2025-02-08 08:35:42,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 201 transitions, 454 flow. Second operand has 9 states, 9 states have (on average 96.66666666666667) internal successors, (870), 9 states have internal predecessors, (870), 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 08:35:42,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:35:42,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 207 [2025-02-08 08:35:42,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand