./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/goblint-regression/09-regions_13-arraycollapse_nr.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c00e63dc 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/goblint-regression/09-regions_13-arraycollapse_nr.i -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 b018c23c1a90f89310fc4f08bf16b02660af5a398ccd47f63d319e7a234c112b --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-06 12:54:34,125 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-06 12:54:34,204 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-02-06 12:54:34,214 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-06 12:54:34,215 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-06 12:54:34,244 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-06 12:54:34,245 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-06 12:54:34,245 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-06 12:54:34,245 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-06 12:54:34,246 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-06 12:54:34,246 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-06 12:54:34,246 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-06 12:54:34,247 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-06 12:54:34,247 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-06 12:54:34,247 INFO L153 SettingsManager]: * Use SBE=true [2025-02-06 12:54:34,247 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-06 12:54:34,247 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-06 12:54:34,247 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-06 12:54:34,247 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-06 12:54:34,247 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-06 12:54:34,247 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-02-06 12:54:34,247 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-02-06 12:54:34,247 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-02-06 12:54:34,247 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-06 12:54:34,247 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-02-06 12:54:34,247 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-06 12:54:34,247 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-06 12:54:34,248 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-06 12:54:34,248 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-06 12:54:34,248 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-06 12:54:34,248 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-06 12:54:34,248 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-06 12:54:34,248 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-06 12:54:34,248 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 12:54:34,248 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-06 12:54:34,248 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-06 12:54:34,248 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-06 12:54:34,248 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-06 12:54:34,248 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-06 12:54:34,248 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-06 12:54:34,248 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-06 12:54:34,248 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-06 12:54:34,248 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 -> b018c23c1a90f89310fc4f08bf16b02660af5a398ccd47f63d319e7a234c112b [2025-02-06 12:54:34,546 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-06 12:54:34,557 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-06 12:54:34,560 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-06 12:54:34,561 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-06 12:54:34,561 INFO L274 PluginConnector]: CDTParser initialized [2025-02-06 12:54:34,562 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/09-regions_13-arraycollapse_nr.i [2025-02-06 12:54:35,860 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/ac7746fae/f6abc90497884c8484444116f23482c2/FLAG9be560dc6 [2025-02-06 12:54:36,208 INFO L384 CDTParser]: Found 1 translation units. [2025-02-06 12:54:36,209 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/goblint-regression/09-regions_13-arraycollapse_nr.i [2025-02-06 12:54:36,232 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/ac7746fae/f6abc90497884c8484444116f23482c2/FLAG9be560dc6 [2025-02-06 12:54:36,252 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/ac7746fae/f6abc90497884c8484444116f23482c2 [2025-02-06 12:54:36,256 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-06 12:54:36,258 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-06 12:54:36,261 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-06 12:54:36,261 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-06 12:54:36,265 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-06 12:54:36,267 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 12:54:36" (1/1) ... [2025-02-06 12:54:36,269 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7475c7d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:54:36, skipping insertion in model container [2025-02-06 12:54:36,270 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 12:54:36" (1/1) ... [2025-02-06 12:54:36,321 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-06 12:54:36,943 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 12:54:36,997 INFO L200 MainTranslator]: Completed pre-run [2025-02-06 12:54:37,073 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 12:54:37,154 INFO L204 MainTranslator]: Completed translation [2025-02-06 12:54:37,155 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:54:37 WrapperNode [2025-02-06 12:54:37,155 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-06 12:54:37,156 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-06 12:54:37,156 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-06 12:54:37,156 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-06 12:54:37,162 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:54:37" (1/1) ... [2025-02-06 12:54:37,180 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:54:37" (1/1) ... [2025-02-06 12:54:37,210 INFO L138 Inliner]: procedures = 372, calls = 95, calls flagged for inlining = 14, calls inlined = 14, statements flattened = 226 [2025-02-06 12:54:37,210 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-06 12:54:37,211 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-06 12:54:37,211 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-06 12:54:37,211 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-06 12:54:37,220 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:54:37" (1/1) ... [2025-02-06 12:54:37,221 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:54:37" (1/1) ... [2025-02-06 12:54:37,226 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:54:37" (1/1) ... [2025-02-06 12:54:37,270 INFO L175 MemorySlicer]: Split 90 memory accesses to 3 slices as follows [50, 16, 24]. 56 percent of accesses are in the largest equivalence class. The 60 initializations are split as follows [50, 10, 0]. The 19 writes are split as follows [0, 1, 18]. [2025-02-06 12:54:37,270 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:54:37" (1/1) ... [2025-02-06 12:54:37,270 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:54:37" (1/1) ... [2025-02-06 12:54:37,288 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:54:37" (1/1) ... [2025-02-06 12:54:37,290 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:54:37" (1/1) ... [2025-02-06 12:54:37,295 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:54:37" (1/1) ... [2025-02-06 12:54:37,297 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:54:37" (1/1) ... [2025-02-06 12:54:37,309 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-06 12:54:37,311 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-06 12:54:37,311 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-06 12:54:37,311 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-06 12:54:37,312 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:54:37" (1/1) ... [2025-02-06 12:54:37,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 12:54:37,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:54:37,353 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) [2025-02-06 12:54:37,358 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 [2025-02-06 12:54:37,383 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2025-02-06 12:54:37,383 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2025-02-06 12:54:37,383 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2025-02-06 12:54:37,383 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2025-02-06 12:54:37,383 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2025-02-06 12:54:37,384 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2025-02-06 12:54:37,384 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2025-02-06 12:54:37,384 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-06 12:54:37,384 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-06 12:54:37,384 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-02-06 12:54:37,384 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-06 12:54:37,384 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-06 12:54:37,384 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-02-06 12:54:37,385 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2025-02-06 12:54:37,385 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-06 12:54:37,385 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-06 12:54:37,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2025-02-06 12:54:37,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2025-02-06 12:54:37,386 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2025-02-06 12:54:37,386 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2025-02-06 12:54:37,387 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2025-02-06 12:54:37,387 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-06 12:54:37,387 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-06 12:54:37,387 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-02-06 12:54:37,387 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-06 12:54:37,387 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-06 12:54:37,389 WARN L227 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-02-06 12:54:37,585 INFO L257 CfgBuilder]: Building ICFG [2025-02-06 12:54:37,586 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-06 12:54:38,173 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-06 12:54:38,174 INFO L308 CfgBuilder]: Performing block encoding [2025-02-06 12:54:38,562 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-06 12:54:38,563 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-06 12:54:38,563 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 12:54:38 BoogieIcfgContainer [2025-02-06 12:54:38,563 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-06 12:54:38,565 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-06 12:54:38,565 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-06 12:54:38,570 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-06 12:54:38,570 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.02 12:54:36" (1/3) ... [2025-02-06 12:54:38,571 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8c770d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 12:54:38, skipping insertion in model container [2025-02-06 12:54:38,571 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:54:37" (2/3) ... [2025-02-06 12:54:38,571 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8c770d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 12:54:38, skipping insertion in model container [2025-02-06 12:54:38,571 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 12:54:38" (3/3) ... [2025-02-06 12:54:38,572 INFO L128 eAbstractionObserver]: Analyzing ICFG 09-regions_13-arraycollapse_nr.i [2025-02-06 12:54:38,588 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-06 12:54:38,590 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG 09-regions_13-arraycollapse_nr.i that has 2 procedures, 107 locations, 1 initial locations, 1 loop locations, and 61 error locations. [2025-02-06 12:54:38,590 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-06 12:54:38,659 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-02-06 12:54:38,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 110 places, 107 transitions, 218 flow [2025-02-06 12:54:38,745 INFO L124 PetriNetUnfolderBase]: 1/106 cut-off events. [2025-02-06 12:54:38,749 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-06 12:54:38,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110 conditions, 106 events. 1/106 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 339 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 66. Up to 2 conditions per place. [2025-02-06 12:54:38,751 INFO L82 GeneralOperation]: Start removeDead. Operand has 110 places, 107 transitions, 218 flow [2025-02-06 12:54:38,757 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 109 places, 106 transitions, 215 flow [2025-02-06 12:54:38,771 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-06 12:54:38,786 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;@3a8c79fa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-06 12:54:38,786 INFO L334 AbstractCegarLoop]: Starting to check reachability of 74 error locations. [2025-02-06 12:54:38,793 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-06 12:54:38,793 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2025-02-06 12:54:38,793 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-06 12:54:38,793 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:54:38,795 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-06 12:54:38,795 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr47REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr47REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr48REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2025-02-06 12:54:38,801 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:54:38,801 INFO L85 PathProgramCache]: Analyzing trace with hash 685641, now seen corresponding path program 1 times [2025-02-06 12:54:38,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:54:38,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875139022] [2025-02-06 12:54:38,810 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:54:38,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:54:38,927 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-06 12:54:38,956 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-06 12:54:38,957 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:54:38,958 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:54:39,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:54:39,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:54:39,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875139022] [2025-02-06 12:54:39,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875139022] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:54:39,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:54:39,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 12:54:39,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160711590] [2025-02-06 12:54:39,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:54:39,201 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 12:54:39,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:54:39,227 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 12:54:39,228 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 12:54:39,352 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 107 [2025-02-06 12:54:39,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 106 transitions, 215 flow. Second operand has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 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) [2025-02-06 12:54:39,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:54:39,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 107 [2025-02-06 12:54:39,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:54:39,521 INFO L124 PetriNetUnfolderBase]: 64/293 cut-off events. [2025-02-06 12:54:39,521 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-06 12:54:39,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 462 conditions, 293 events. 64/293 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1326 event pairs, 63 based on Foata normal form. 0/226 useless extension candidates. Maximal degree in co-relation 376. Up to 157 conditions per place. [2025-02-06 12:54:39,531 INFO L140 encePairwiseOnDemand]: 91/107 looper letters, 30 selfloop transitions, 8 changer transitions 0/98 dead transitions. [2025-02-06 12:54:39,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 98 transitions, 275 flow [2025-02-06 12:54:39,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 12:54:39,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 12:54:39,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 229 transitions. [2025-02-06 12:54:39,547 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7133956386292835 [2025-02-06 12:54:39,549 INFO L175 Difference]: Start difference. First operand has 109 places, 106 transitions, 215 flow. Second operand 3 states and 229 transitions. [2025-02-06 12:54:39,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 98 transitions, 275 flow [2025-02-06 12:54:39,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 98 transitions, 274 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 12:54:39,559 INFO L231 Difference]: Finished difference. Result has 102 places, 98 transitions, 214 flow [2025-02-06 12:54:39,562 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=214, PETRI_PLACES=102, PETRI_TRANSITIONS=98} [2025-02-06 12:54:39,566 INFO L279 CegarLoopForPetriNet]: 109 programPoint places, -7 predicate places. [2025-02-06 12:54:39,568 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 98 transitions, 214 flow [2025-02-06 12:54:39,568 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 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) [2025-02-06 12:54:39,568 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:54:39,568 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-06 12:54:39,569 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-06 12:54:39,569 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr48REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr47REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr48REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2025-02-06 12:54:39,570 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:54:39,570 INFO L85 PathProgramCache]: Analyzing trace with hash 685642, now seen corresponding path program 1 times [2025-02-06 12:54:39,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:54:39,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699365735] [2025-02-06 12:54:39,572 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:54:39,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:54:39,596 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-06 12:54:39,620 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-06 12:54:39,621 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:54:39,621 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:54:39,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:54:39,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:54:39,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699365735] [2025-02-06 12:54:39,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699365735] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:54:39,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:54:39,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 12:54:39,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141139865] [2025-02-06 12:54:39,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:54:39,742 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 12:54:39,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:54:39,742 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 12:54:39,742 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 12:54:39,873 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 107 [2025-02-06 12:54:39,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 98 transitions, 214 flow. Second operand has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 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) [2025-02-06 12:54:39,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:54:39,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 107 [2025-02-06 12:54:39,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:54:40,026 INFO L124 PetriNetUnfolderBase]: 64/285 cut-off events. [2025-02-06 12:54:40,026 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2025-02-06 12:54:40,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 458 conditions, 285 events. 64/285 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1286 event pairs, 63 based on Foata normal form. 8/226 useless extension candidates. Maximal degree in co-relation 395. Up to 157 conditions per place. [2025-02-06 12:54:40,029 INFO L140 encePairwiseOnDemand]: 91/107 looper letters, 26 selfloop transitions, 8 changer transitions 0/90 dead transitions. [2025-02-06 12:54:40,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 90 transitions, 266 flow [2025-02-06 12:54:40,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 12:54:40,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 12:54:40,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 237 transitions. [2025-02-06 12:54:40,033 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7383177570093458 [2025-02-06 12:54:40,033 INFO L175 Difference]: Start difference. First operand has 102 places, 98 transitions, 214 flow. Second operand 3 states and 237 transitions. [2025-02-06 12:54:40,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 90 transitions, 266 flow [2025-02-06 12:54:40,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 90 transitions, 250 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 12:54:40,035 INFO L231 Difference]: Finished difference. Result has 94 places, 90 transitions, 198 flow [2025-02-06 12:54:40,037 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=198, PETRI_PLACES=94, PETRI_TRANSITIONS=90} [2025-02-06 12:54:40,038 INFO L279 CegarLoopForPetriNet]: 109 programPoint places, -15 predicate places. [2025-02-06 12:54:40,039 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 90 transitions, 198 flow [2025-02-06 12:54:40,039 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 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) [2025-02-06 12:54:40,040 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:54:40,040 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2025-02-06 12:54:40,040 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-06 12:54:40,040 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr43REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr47REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr48REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2025-02-06 12:54:40,042 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:54:40,042 INFO L85 PathProgramCache]: Analyzing trace with hash 658921911, now seen corresponding path program 1 times [2025-02-06 12:54:40,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:54:40,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153351850] [2025-02-06 12:54:40,043 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:54:40,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:54:40,065 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-06 12:54:40,084 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-06 12:54:40,084 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:54:40,084 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:54:40,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:54:40,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:54:40,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153351850] [2025-02-06 12:54:40,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153351850] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:54:40,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:54:40,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 12:54:40,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573591983] [2025-02-06 12:54:40,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:54:40,286 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 12:54:40,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:54:40,287 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 12:54:40,287 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2025-02-06 12:54:40,555 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 107 [2025-02-06 12:54:40,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 90 transitions, 198 flow. Second operand has 6 states, 6 states have (on average 62.833333333333336) internal successors, (377), 6 states have internal predecessors, (377), 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) [2025-02-06 12:54:40,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:54:40,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 107 [2025-02-06 12:54:40,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:54:40,708 INFO L124 PetriNetUnfolderBase]: 73/305 cut-off events. [2025-02-06 12:54:40,708 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2025-02-06 12:54:40,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 501 conditions, 305 events. 73/305 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1391 event pairs, 72 based on Foata normal form. 1/245 useless extension candidates. Maximal degree in co-relation 437. Up to 183 conditions per place. [2025-02-06 12:54:40,712 INFO L140 encePairwiseOnDemand]: 100/107 looper letters, 38 selfloop transitions, 1 changer transitions 0/84 dead transitions. [2025-02-06 12:54:40,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 84 transitions, 264 flow [2025-02-06 12:54:40,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 12:54:40,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 12:54:40,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 231 transitions. [2025-02-06 12:54:40,716 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.719626168224299 [2025-02-06 12:54:40,716 INFO L175 Difference]: Start difference. First operand has 94 places, 90 transitions, 198 flow. Second operand 3 states and 231 transitions. [2025-02-06 12:54:40,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 84 transitions, 264 flow [2025-02-06 12:54:40,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 84 transitions, 248 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 12:54:40,718 INFO L231 Difference]: Finished difference. Result has 88 places, 84 transitions, 172 flow [2025-02-06 12:54:40,718 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=172, PETRI_PLACES=88, PETRI_TRANSITIONS=84} [2025-02-06 12:54:40,721 INFO L279 CegarLoopForPetriNet]: 109 programPoint places, -21 predicate places. [2025-02-06 12:54:40,721 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 84 transitions, 172 flow [2025-02-06 12:54:40,721 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 62.833333333333336) internal successors, (377), 6 states have internal predecessors, (377), 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) [2025-02-06 12:54:40,721 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:54:40,722 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2025-02-06 12:54:40,722 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-02-06 12:54:40,722 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr44REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr47REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr48REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2025-02-06 12:54:40,722 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:54:40,722 INFO L85 PathProgramCache]: Analyzing trace with hash 658921912, now seen corresponding path program 1 times [2025-02-06 12:54:40,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:54:40,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678741035] [2025-02-06 12:54:40,723 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:54:40,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:54:40,739 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-06 12:54:40,756 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-06 12:54:40,760 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:54:40,760 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:54:41,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:54:41,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:54:41,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678741035] [2025-02-06 12:54:41,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678741035] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:54:41,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:54:41,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 12:54:41,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128098137] [2025-02-06 12:54:41,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:54:41,018 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 12:54:41,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:54:41,019 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 12:54:41,019 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-02-06 12:54:41,286 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 107 [2025-02-06 12:54:41,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 84 transitions, 172 flow. Second operand has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 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) [2025-02-06 12:54:41,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:54:41,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 107 [2025-02-06 12:54:41,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:54:41,477 INFO L124 PetriNetUnfolderBase]: 64/291 cut-off events. [2025-02-06 12:54:41,478 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-06 12:54:41,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 466 conditions, 291 events. 64/291 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1217 event pairs, 63 based on Foata normal form. 0/228 useless extension candidates. Maximal degree in co-relation 460. Up to 163 conditions per place. [2025-02-06 12:54:41,480 INFO L140 encePairwiseOnDemand]: 98/107 looper letters, 37 selfloop transitions, 6 changer transitions 0/91 dead transitions. [2025-02-06 12:54:41,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 91 transitions, 272 flow [2025-02-06 12:54:41,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 12:54:41,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 12:54:41,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 274 transitions. [2025-02-06 12:54:41,482 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6401869158878505 [2025-02-06 12:54:41,482 INFO L175 Difference]: Start difference. First operand has 88 places, 84 transitions, 172 flow. Second operand 4 states and 274 transitions. [2025-02-06 12:54:41,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 91 transitions, 272 flow [2025-02-06 12:54:41,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 91 transitions, 271 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 12:54:41,488 INFO L231 Difference]: Finished difference. Result has 92 places, 89 transitions, 219 flow [2025-02-06 12:54:41,488 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=219, PETRI_PLACES=92, PETRI_TRANSITIONS=89} [2025-02-06 12:54:41,489 INFO L279 CegarLoopForPetriNet]: 109 programPoint places, -17 predicate places. [2025-02-06 12:54:41,489 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 89 transitions, 219 flow [2025-02-06 12:54:41,489 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 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) [2025-02-06 12:54:41,489 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:54:41,489 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:54:41,489 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-02-06 12:54:41,489 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr35REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr47REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr48REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2025-02-06 12:54:41,490 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:54:41,490 INFO L85 PathProgramCache]: Analyzing trace with hash 96230033, now seen corresponding path program 1 times [2025-02-06 12:54:41,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:54:41,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020900161] [2025-02-06 12:54:41,490 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:54:41,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:54:41,508 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-06 12:54:41,526 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-06 12:54:41,527 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:54:41,527 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:54:41,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:54:41,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:54:41,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020900161] [2025-02-06 12:54:41,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020900161] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:54:41,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:54:41,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-02-06 12:54:41,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068198286] [2025-02-06 12:54:41,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:54:41,882 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-06 12:54:41,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:54:41,882 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-06 12:54:41,883 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2025-02-06 12:54:42,276 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 107 [2025-02-06 12:54:42,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 89 transitions, 219 flow. Second operand has 7 states, 7 states have (on average 53.285714285714285) internal successors, (373), 7 states have internal predecessors, (373), 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) [2025-02-06 12:54:42,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:54:42,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 107 [2025-02-06 12:54:42,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:54:42,512 INFO L124 PetriNetUnfolderBase]: 64/285 cut-off events. [2025-02-06 12:54:42,513 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-06 12:54:42,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 491 conditions, 285 events. 64/285 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1182 event pairs, 63 based on Foata normal form. 0/234 useless extension candidates. Maximal degree in co-relation 482. Up to 154 conditions per place. [2025-02-06 12:54:42,515 INFO L140 encePairwiseOnDemand]: 90/107 looper letters, 30 selfloop transitions, 18 changer transitions 0/85 dead transitions. [2025-02-06 12:54:42,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 85 transitions, 307 flow [2025-02-06 12:54:42,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-06 12:54:42,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-06 12:54:42,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 463 transitions. [2025-02-06 12:54:42,517 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5408878504672897 [2025-02-06 12:54:42,517 INFO L175 Difference]: Start difference. First operand has 92 places, 89 transitions, 219 flow. Second operand 8 states and 463 transitions. [2025-02-06 12:54:42,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 85 transitions, 307 flow [2025-02-06 12:54:42,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 85 transitions, 305 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 12:54:42,520 INFO L231 Difference]: Finished difference. Result has 94 places, 85 transitions, 245 flow [2025-02-06 12:54:42,521 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=245, PETRI_PLACES=94, PETRI_TRANSITIONS=85} [2025-02-06 12:54:42,521 INFO L279 CegarLoopForPetriNet]: 109 programPoint places, -15 predicate places. [2025-02-06 12:54:42,522 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 85 transitions, 245 flow [2025-02-06 12:54:42,522 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 53.285714285714285) internal successors, (373), 7 states have internal predecessors, (373), 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) [2025-02-06 12:54:42,522 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:54:42,522 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:54:42,522 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-02-06 12:54:42,523 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr36REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr47REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr48REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2025-02-06 12:54:42,523 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:54:42,523 INFO L85 PathProgramCache]: Analyzing trace with hash 96230034, now seen corresponding path program 1 times [2025-02-06 12:54:42,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:54:42,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421448855] [2025-02-06 12:54:42,523 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:54:42,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:54:42,538 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-06 12:54:42,553 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-06 12:54:42,553 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:54:42,553 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:54:42,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:54:42,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:54:42,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421448855] [2025-02-06 12:54:42,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421448855] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:54:42,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:54:42,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-02-06 12:54:42,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55734133] [2025-02-06 12:54:42,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:54:42,946 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-06 12:54:42,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:54:42,947 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-06 12:54:42,947 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2025-02-06 12:54:43,543 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 107 [2025-02-06 12:54:43,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 85 transitions, 245 flow. Second operand has 7 states, 7 states have (on average 48.285714285714285) internal successors, (338), 7 states have internal predecessors, (338), 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) [2025-02-06 12:54:43,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:54:43,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 107 [2025-02-06 12:54:43,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:54:43,766 INFO L124 PetriNetUnfolderBase]: 64/281 cut-off events. [2025-02-06 12:54:43,766 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2025-02-06 12:54:43,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 503 conditions, 281 events. 64/281 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1187 event pairs, 63 based on Foata normal form. 2/234 useless extension candidates. Maximal degree in co-relation 494. Up to 158 conditions per place. [2025-02-06 12:54:43,768 INFO L140 encePairwiseOnDemand]: 95/107 looper letters, 32 selfloop transitions, 15 changer transitions 0/83 dead transitions. [2025-02-06 12:54:43,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 83 transitions, 335 flow [2025-02-06 12:54:43,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-06 12:54:43,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-06 12:54:43,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 373 transitions. [2025-02-06 12:54:43,773 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4979973297730307 [2025-02-06 12:54:43,773 INFO L175 Difference]: Start difference. First operand has 94 places, 85 transitions, 245 flow. Second operand 7 states and 373 transitions. [2025-02-06 12:54:43,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 83 transitions, 335 flow [2025-02-06 12:54:43,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 83 transitions, 299 flow, removed 0 selfloop flow, removed 7 redundant places. [2025-02-06 12:54:43,775 INFO L231 Difference]: Finished difference. Result has 91 places, 83 transitions, 235 flow [2025-02-06 12:54:43,776 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=235, PETRI_PLACES=91, PETRI_TRANSITIONS=83} [2025-02-06 12:54:43,778 INFO L279 CegarLoopForPetriNet]: 109 programPoint places, -18 predicate places. [2025-02-06 12:54:43,778 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 83 transitions, 235 flow [2025-02-06 12:54:43,778 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 48.285714285714285) internal successors, (338), 7 states have internal predecessors, (338), 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) [2025-02-06 12:54:43,779 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:54:43,779 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:54:43,780 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-02-06 12:54:43,780 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr47REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr48REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2025-02-06 12:54:43,780 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:54:43,780 INFO L85 PathProgramCache]: Analyzing trace with hash -2012196690, now seen corresponding path program 1 times [2025-02-06 12:54:43,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:54:43,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065814595] [2025-02-06 12:54:43,781 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:54:43,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:54:43,794 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-06 12:54:43,801 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-06 12:54:43,802 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:54:43,802 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:54:43,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:54:43,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:54:43,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065814595] [2025-02-06 12:54:43,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065814595] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:54:43,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:54:43,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 12:54:43,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654848082] [2025-02-06 12:54:43,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:54:43,885 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 12:54:43,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:54:43,885 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 12:54:43,885 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-06 12:54:44,132 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 107 [2025-02-06 12:54:44,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 83 transitions, 235 flow. Second operand has 5 states, 5 states have (on average 60.0) internal successors, (300), 5 states have internal predecessors, (300), 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) [2025-02-06 12:54:44,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:54:44,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 107 [2025-02-06 12:54:44,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:54:44,289 INFO L124 PetriNetUnfolderBase]: 64/279 cut-off events. [2025-02-06 12:54:44,289 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2025-02-06 12:54:44,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 496 conditions, 279 events. 64/279 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1171 event pairs, 63 based on Foata normal form. 2/231 useless extension candidates. Maximal degree in co-relation 487. Up to 158 conditions per place. [2025-02-06 12:54:44,291 INFO L140 encePairwiseOnDemand]: 96/107 looper letters, 30 selfloop transitions, 15 changer transitions 0/82 dead transitions. [2025-02-06 12:54:44,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 82 transitions, 323 flow [2025-02-06 12:54:44,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 12:54:44,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 12:54:44,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 331 transitions. [2025-02-06 12:54:44,293 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6186915887850467 [2025-02-06 12:54:44,293 INFO L175 Difference]: Start difference. First operand has 91 places, 83 transitions, 235 flow. Second operand 5 states and 331 transitions. [2025-02-06 12:54:44,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 82 transitions, 323 flow [2025-02-06 12:54:44,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 82 transitions, 293 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-02-06 12:54:44,296 INFO L231 Difference]: Finished difference. Result has 88 places, 82 transitions, 233 flow [2025-02-06 12:54:44,296 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=233, PETRI_PLACES=88, PETRI_TRANSITIONS=82} [2025-02-06 12:54:44,296 INFO L279 CegarLoopForPetriNet]: 109 programPoint places, -21 predicate places. [2025-02-06 12:54:44,297 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 82 transitions, 233 flow [2025-02-06 12:54:44,297 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 60.0) internal successors, (300), 5 states have internal predecessors, (300), 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) [2025-02-06 12:54:44,297 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:54:44,297 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:54:44,297 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-02-06 12:54:44,297 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr47REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr48REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2025-02-06 12:54:44,298 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:54:44,298 INFO L85 PathProgramCache]: Analyzing trace with hash -2012196689, now seen corresponding path program 1 times [2025-02-06 12:54:44,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:54:44,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313294581] [2025-02-06 12:54:44,298 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:54:44,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:54:44,316 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-06 12:54:44,329 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-06 12:54:44,330 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:54:44,330 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:54:44,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:54:44,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:54:44,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313294581] [2025-02-06 12:54:44,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313294581] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:54:44,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:54:44,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 12:54:44,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568847900] [2025-02-06 12:54:44,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:54:44,498 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 12:54:44,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:54:44,498 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 12:54:44,498 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-06 12:54:44,721 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 107 [2025-02-06 12:54:44,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 82 transitions, 233 flow. Second operand has 5 states, 5 states have (on average 63.6) internal successors, (318), 5 states have internal predecessors, (318), 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) [2025-02-06 12:54:44,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:54:44,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 107 [2025-02-06 12:54:44,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:54:44,883 INFO L124 PetriNetUnfolderBase]: 64/277 cut-off events. [2025-02-06 12:54:44,884 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2025-02-06 12:54:44,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 488 conditions, 277 events. 64/277 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1169 event pairs, 63 based on Foata normal form. 2/229 useless extension candidates. Maximal degree in co-relation 479. Up to 158 conditions per place. [2025-02-06 12:54:44,886 INFO L140 encePairwiseOnDemand]: 96/107 looper letters, 26 selfloop transitions, 15 changer transitions 0/81 dead transitions. [2025-02-06 12:54:44,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 81 transitions, 313 flow [2025-02-06 12:54:44,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 12:54:44,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 12:54:44,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 347 transitions. [2025-02-06 12:54:44,891 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6485981308411215 [2025-02-06 12:54:44,891 INFO L175 Difference]: Start difference. First operand has 88 places, 82 transitions, 233 flow. Second operand 5 states and 347 transitions. [2025-02-06 12:54:44,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 81 transitions, 313 flow [2025-02-06 12:54:44,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 81 transitions, 283 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-06 12:54:44,893 INFO L231 Difference]: Finished difference. Result has 87 places, 81 transitions, 231 flow [2025-02-06 12:54:44,893 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=231, PETRI_PLACES=87, PETRI_TRANSITIONS=81} [2025-02-06 12:54:44,895 INFO L279 CegarLoopForPetriNet]: 109 programPoint places, -22 predicate places. [2025-02-06 12:54:44,896 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 81 transitions, 231 flow [2025-02-06 12:54:44,896 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 63.6) internal successors, (318), 5 states have internal predecessors, (318), 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) [2025-02-06 12:54:44,896 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:54:44,896 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:54:44,896 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-02-06 12:54:44,896 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr44REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr47REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr48REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2025-02-06 12:54:44,897 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:54:44,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1915427506, now seen corresponding path program 1 times [2025-02-06 12:54:44,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:54:44,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117061693] [2025-02-06 12:54:44,898 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:54:44,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:54:44,921 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-06 12:54:44,947 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-06 12:54:44,948 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:54:44,948 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:54:45,309 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:54:45,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:54:45,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117061693] [2025-02-06 12:54:45,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117061693] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 12:54:45,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855625536] [2025-02-06 12:54:45,310 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:54:45,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:54:45,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:54:45,313 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) [2025-02-06 12:54:45,315 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 [2025-02-06 12:54:45,411 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-06 12:54:45,471 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-06 12:54:45,472 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:54:45,472 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:54:45,476 INFO L256 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-02-06 12:54:45,481 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:54:45,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 12:54:45,562 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-02-06 12:54:45,645 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-02-06 12:54:45,645 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2025-02-06 12:54:45,677 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-06 12:54:45,677 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-02-06 12:54:45,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 12:54:45,825 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-02-06 12:54:45,873 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:54:45,873 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 12:54:46,177 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 12:54:46,177 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2025-02-06 12:54:46,291 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-02-06 12:54:46,291 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2025-02-06 12:54:46,372 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:54:46,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855625536] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 12:54:46,373 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 12:54:46,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 16 [2025-02-06 12:54:46,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187127985] [2025-02-06 12:54:46,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 12:54:46,374 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-02-06 12:54:46,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:54:46,374 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-02-06 12:54:46,375 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2025-02-06 12:54:49,092 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 107 [2025-02-06 12:54:49,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 81 transitions, 231 flow. Second operand has 18 states, 18 states have (on average 57.833333333333336) internal successors, (1041), 18 states have internal predecessors, (1041), 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) [2025-02-06 12:54:49,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:54:49,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 107 [2025-02-06 12:54:49,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:54:49,604 INFO L124 PetriNetUnfolderBase]: 75/332 cut-off events. [2025-02-06 12:54:49,604 INFO L125 PetriNetUnfolderBase]: For 49/49 co-relation queries the response was YES. [2025-02-06 12:54:49,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 611 conditions, 332 events. 75/332 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1446 event pairs, 72 based on Foata normal form. 6/281 useless extension candidates. Maximal degree in co-relation 602. Up to 178 conditions per place. [2025-02-06 12:54:49,607 INFO L140 encePairwiseOnDemand]: 98/107 looper letters, 46 selfloop transitions, 16 changer transitions 0/101 dead transitions. [2025-02-06 12:54:49,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 101 transitions, 459 flow [2025-02-06 12:54:49,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-06 12:54:49,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-06 12:54:49,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 573 transitions. [2025-02-06 12:54:49,609 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5950155763239875 [2025-02-06 12:54:49,609 INFO L175 Difference]: Start difference. First operand has 87 places, 81 transitions, 231 flow. Second operand 9 states and 573 transitions. [2025-02-06 12:54:49,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 101 transitions, 459 flow [2025-02-06 12:54:49,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 101 transitions, 393 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-06 12:54:49,612 INFO L231 Difference]: Finished difference. Result has 95 places, 89 transitions, 305 flow [2025-02-06 12:54:49,614 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=305, PETRI_PLACES=95, PETRI_TRANSITIONS=89} [2025-02-06 12:54:49,615 INFO L279 CegarLoopForPetriNet]: 109 programPoint places, -14 predicate places. [2025-02-06 12:54:49,616 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 89 transitions, 305 flow [2025-02-06 12:54:49,617 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 57.833333333333336) internal successors, (1041), 18 states have internal predecessors, (1041), 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) [2025-02-06 12:54:49,617 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:54:49,617 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2025-02-06 12:54:49,628 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 [2025-02-06 12:54:49,822 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:54:49,822 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr47REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr48REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2025-02-06 12:54:49,823 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:54:49,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1568059270, now seen corresponding path program 1 times [2025-02-06 12:54:49,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:54:49,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697140299] [2025-02-06 12:54:49,823 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:54:49,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:54:49,851 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-02-06 12:54:49,881 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-02-06 12:54:49,881 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:54:49,881 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:54:50,060 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:54:50,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:54:50,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697140299] [2025-02-06 12:54:50,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697140299] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 12:54:50,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377540840] [2025-02-06 12:54:50,061 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:54:50,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:54:50,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:54:50,063 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) [2025-02-06 12:54:50,066 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 [2025-02-06 12:54:50,181 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-02-06 12:54:50,253 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-02-06 12:54:50,253 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:54:50,253 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:54:50,257 INFO L256 TraceCheckSpWp]: Trace formula consists of 626 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-02-06 12:54:50,258 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:54:50,304 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:54:50,304 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 12:54:50,358 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:54:50,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377540840] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 12:54:50,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 12:54:50,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2025-02-06 12:54:50,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180331129] [2025-02-06 12:54:50,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 12:54:50,359 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-02-06 12:54:50,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:54:50,360 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-02-06 12:54:50,360 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2025-02-06 12:54:50,381 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 107 [2025-02-06 12:54:50,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 89 transitions, 305 flow. Second operand has 9 states, 9 states have (on average 77.55555555555556) internal successors, (698), 9 states have internal predecessors, (698), 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) [2025-02-06 12:54:50,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:54:50,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 107 [2025-02-06 12:54:50,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:54:50,616 INFO L124 PetriNetUnfolderBase]: 64/318 cut-off events. [2025-02-06 12:54:50,616 INFO L125 PetriNetUnfolderBase]: For 108/108 co-relation queries the response was YES. [2025-02-06 12:54:50,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 618 conditions, 318 events. 64/318 cut-off events. For 108/108 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1131 event pairs, 63 based on Foata normal form. 4/272 useless extension candidates. Maximal degree in co-relation 603. Up to 154 conditions per place. [2025-02-06 12:54:50,618 INFO L140 encePairwiseOnDemand]: 103/107 looper letters, 62 selfloop transitions, 8 changer transitions 0/111 dead transitions. [2025-02-06 12:54:50,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 111 transitions, 541 flow [2025-02-06 12:54:50,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-06 12:54:50,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-06 12:54:50,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 658 transitions. [2025-02-06 12:54:50,621 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7686915887850467 [2025-02-06 12:54:50,621 INFO L175 Difference]: Start difference. First operand has 95 places, 89 transitions, 305 flow. Second operand 8 states and 658 transitions. [2025-02-06 12:54:50,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 111 transitions, 541 flow [2025-02-06 12:54:50,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 111 transitions, 521 flow, removed 5 selfloop flow, removed 2 redundant places. [2025-02-06 12:54:50,624 INFO L231 Difference]: Finished difference. Result has 103 places, 90 transitions, 321 flow [2025-02-06 12:54:50,625 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=321, PETRI_PLACES=103, PETRI_TRANSITIONS=90} [2025-02-06 12:54:50,625 INFO L279 CegarLoopForPetriNet]: 109 programPoint places, -6 predicate places. [2025-02-06 12:54:50,625 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 90 transitions, 321 flow [2025-02-06 12:54:50,626 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 77.55555555555556) internal successors, (698), 9 states have internal predecessors, (698), 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) [2025-02-06 12:54:50,626 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:54:50,626 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1] [2025-02-06 12:54:50,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-02-06 12:54:50,826 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:54:50,826 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr44REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr47REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr48REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2025-02-06 12:54:50,827 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:54:50,827 INFO L85 PathProgramCache]: Analyzing trace with hash 2034449056, now seen corresponding path program 2 times [2025-02-06 12:54:50,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:54:50,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654724053] [2025-02-06 12:54:50,827 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 12:54:50,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:54:50,889 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 45 statements into 2 equivalence classes. [2025-02-06 12:54:51,012 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 45 of 45 statements. [2025-02-06 12:54:51,012 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 12:54:51,012 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:54:52,618 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 4 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:54:52,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:54:52,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654724053] [2025-02-06 12:54:52,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654724053] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 12:54:52,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288880539] [2025-02-06 12:54:52,618 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 12:54:52,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:54:52,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:54:52,622 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) [2025-02-06 12:54:52,624 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 [2025-02-06 12:54:52,806 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 45 statements into 2 equivalence classes. [2025-02-06 12:54:52,944 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 45 of 45 statements. [2025-02-06 12:54:52,944 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 12:54:52,944 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:54:52,956 INFO L256 TraceCheckSpWp]: Trace formula consists of 1022 conjuncts, 65 conjuncts are in the unsatisfiable core [2025-02-06 12:54:52,961 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:54:53,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 12:54:53,008 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-02-06 12:54:53,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 12:54:53,053 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-02-06 12:54:53,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 12:54:53,150 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-02-06 12:54:53,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 12:54:53,210 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-02-06 12:54:53,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 12:54:53,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-02-06 12:54:53,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 12:54:53,365 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-02-06 12:54:53,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 12:54:53,457 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-02-06 12:54:53,519 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-02-06 12:54:53,519 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2025-02-06 12:54:53,539 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-06 12:54:53,539 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-02-06 12:54:53,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 12:54:53,694 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-02-06 12:54:53,731 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 4 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:54:53,731 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 12:54:53,938 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-02-06 12:54:53,939 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2025-02-06 12:54:54,064 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-02-06 12:54:54,064 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2025-02-06 12:54:54,245 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-02-06 12:54:54,245 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2025-02-06 12:54:54,369 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-02-06 12:54:54,369 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2025-02-06 12:54:54,550 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-02-06 12:54:54,550 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2025-02-06 12:54:54,683 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-02-06 12:54:54,683 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2025-02-06 12:54:54,859 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-02-06 12:54:54,859 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2025-02-06 12:54:54,970 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-02-06 12:54:54,970 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2025-02-06 12:54:55,097 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 4 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:54:55,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288880539] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 12:54:55,097 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 12:54:55,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 15] total 45 [2025-02-06 12:54:55,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048695016] [2025-02-06 12:54:55,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 12:54:55,098 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2025-02-06 12:54:55,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:54:55,099 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2025-02-06 12:54:55,100 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=536, Invalid=1626, Unknown=0, NotChecked=0, Total=2162 [2025-02-06 12:55:01,133 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 107 [2025-02-06 12:55:01,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 90 transitions, 321 flow. Second operand has 47 states, 47 states have (on average 58.04255319148936) internal successors, (2728), 47 states have internal predecessors, (2728), 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) [2025-02-06 12:55:01,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:55:01,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 107 [2025-02-06 12:55:01,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:55:02,479 INFO L124 PetriNetUnfolderBase]: 77/394 cut-off events. [2025-02-06 12:55:02,479 INFO L125 PetriNetUnfolderBase]: For 263/263 co-relation queries the response was YES. [2025-02-06 12:55:02,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 840 conditions, 394 events. 77/394 cut-off events. For 263/263 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1527 event pairs, 72 based on Foata normal form. 6/346 useless extension candidates. Maximal degree in co-relation 821. Up to 180 conditions per place. [2025-02-06 12:55:02,481 INFO L140 encePairwiseOnDemand]: 99/107 looper letters, 70 selfloop transitions, 36 changer transitions 0/145 dead transitions. [2025-02-06 12:55:02,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 145 transitions, 867 flow [2025-02-06 12:55:02,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-02-06 12:55:02,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2025-02-06 12:55:02,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1288 transitions. [2025-02-06 12:55:02,485 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.573208722741433 [2025-02-06 12:55:02,486 INFO L175 Difference]: Start difference. First operand has 103 places, 90 transitions, 321 flow. Second operand 21 states and 1288 transitions. [2025-02-06 12:55:02,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 145 transitions, 867 flow [2025-02-06 12:55:02,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 145 transitions, 851 flow, removed 5 selfloop flow, removed 3 redundant places. [2025-02-06 12:55:02,492 INFO L231 Difference]: Finished difference. Result has 130 places, 110 transitions, 629 flow [2025-02-06 12:55:02,492 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=629, PETRI_PLACES=130, PETRI_TRANSITIONS=110} [2025-02-06 12:55:02,495 INFO L279 CegarLoopForPetriNet]: 109 programPoint places, 21 predicate places. [2025-02-06 12:55:02,495 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 110 transitions, 629 flow [2025-02-06 12:55:02,496 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 58.04255319148936) internal successors, (2728), 47 states have internal predecessors, (2728), 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) [2025-02-06 12:55:02,496 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:55:02,496 INFO L206 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1] [2025-02-06 12:55:02,504 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-02-06 12:55:02,696 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:55:02,697 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr47REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr48REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2025-02-06 12:55:02,697 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:55:02,697 INFO L85 PathProgramCache]: Analyzing trace with hash 451021934, now seen corresponding path program 2 times [2025-02-06 12:55:02,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:55:02,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678053562] [2025-02-06 12:55:02,697 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 12:55:02,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:55:02,754 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 65 statements into 2 equivalence classes. [2025-02-06 12:55:02,773 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 65 of 65 statements. [2025-02-06 12:55:02,774 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 12:55:02,774 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:55:03,266 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2025-02-06 12:55:03,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:55:03,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678053562] [2025-02-06 12:55:03,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678053562] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:55:03,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:55:03,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 12:55:03,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764881626] [2025-02-06 12:55:03,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:55:03,268 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 12:55:03,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:55:03,268 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 12:55:03,269 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2025-02-06 12:55:03,675 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 107 [2025-02-06 12:55:03,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 110 transitions, 629 flow. Second operand has 6 states, 6 states have (on average 66.33333333333333) internal successors, (398), 6 states have internal predecessors, (398), 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) [2025-02-06 12:55:03,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:55:03,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 107 [2025-02-06 12:55:03,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:55:03,907 INFO L124 PetriNetUnfolderBase]: 116/562 cut-off events. [2025-02-06 12:55:03,908 INFO L125 PetriNetUnfolderBase]: For 579/579 co-relation queries the response was YES. [2025-02-06 12:55:03,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1200 conditions, 562 events. 116/562 cut-off events. For 579/579 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2939 event pairs, 36 based on Foata normal form. 0/455 useless extension candidates. Maximal degree in co-relation 1170. Up to 161 conditions per place. [2025-02-06 12:55:03,912 INFO L140 encePairwiseOnDemand]: 98/107 looper letters, 59 selfloop transitions, 26 changer transitions 0/123 dead transitions. [2025-02-06 12:55:03,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 123 transitions, 825 flow [2025-02-06 12:55:03,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 12:55:03,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-06 12:55:03,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 438 transitions. [2025-02-06 12:55:03,914 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6822429906542056 [2025-02-06 12:55:03,914 INFO L175 Difference]: Start difference. First operand has 130 places, 110 transitions, 629 flow. Second operand 6 states and 438 transitions. [2025-02-06 12:55:03,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 123 transitions, 825 flow [2025-02-06 12:55:03,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 123 transitions, 701 flow, removed 39 selfloop flow, removed 11 redundant places. [2025-02-06 12:55:03,923 INFO L231 Difference]: Finished difference. Result has 124 places, 111 transitions, 572 flow [2025-02-06 12:55:03,924 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=503, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=572, PETRI_PLACES=124, PETRI_TRANSITIONS=111} [2025-02-06 12:55:03,925 INFO L279 CegarLoopForPetriNet]: 109 programPoint places, 15 predicate places. [2025-02-06 12:55:03,927 INFO L471 AbstractCegarLoop]: Abstraction has has 124 places, 111 transitions, 572 flow [2025-02-06 12:55:03,927 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 66.33333333333333) internal successors, (398), 6 states have internal predecessors, (398), 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) [2025-02-06 12:55:03,927 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:55:03,928 INFO L206 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2025-02-06 12:55:03,928 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2025-02-06 12:55:03,928 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr47REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr48REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2025-02-06 12:55:03,928 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:55:03,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1096778733, now seen corresponding path program 1 times [2025-02-06 12:55:03,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:55:03,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709754852] [2025-02-06 12:55:03,929 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:55:03,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:55:03,977 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 66 statements into 1 equivalence classes. [2025-02-06 12:55:04,019 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 66 of 66 statements. [2025-02-06 12:55:04,019 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:55:04,019 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:55:04,289 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 6 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:55:04,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:55:04,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709754852] [2025-02-06 12:55:04,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709754852] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 12:55:04,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179030565] [2025-02-06 12:55:04,289 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:55:04,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:55:04,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:55:04,292 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:55:04,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-06 12:55:04,508 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 66 statements into 1 equivalence classes. [2025-02-06 12:55:04,702 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 66 of 66 statements. [2025-02-06 12:55:04,702 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:55:04,702 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:55:04,711 INFO L256 TraceCheckSpWp]: Trace formula consists of 1446 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-06 12:55:04,714 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:55:04,801 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 6 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:55:04,801 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 12:55:04,916 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 6 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:55:04,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179030565] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 12:55:04,917 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 12:55:04,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2025-02-06 12:55:04,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183063213] [2025-02-06 12:55:04,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 12:55:04,917 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-06 12:55:04,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:55:04,918 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-06 12:55:04,918 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2025-02-06 12:55:04,937 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 107 [2025-02-06 12:55:04,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 111 transitions, 572 flow. Second operand has 13 states, 13 states have (on average 78.92307692307692) internal successors, (1026), 13 states have internal predecessors, (1026), 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) [2025-02-06 12:55:04,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:55:04,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 107 [2025-02-06 12:55:04,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:55:05,201 INFO L124 PetriNetUnfolderBase]: 95/481 cut-off events. [2025-02-06 12:55:05,201 INFO L125 PetriNetUnfolderBase]: For 489/490 co-relation queries the response was YES. [2025-02-06 12:55:05,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1060 conditions, 481 events. 95/481 cut-off events. For 489/490 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2048 event pairs, 87 based on Foata normal form. 4/410 useless extension candidates. Maximal degree in co-relation 1031. Up to 220 conditions per place. [2025-02-06 12:55:05,207 INFO L140 encePairwiseOnDemand]: 103/107 looper letters, 89 selfloop transitions, 12 changer transitions 0/141 dead transitions. [2025-02-06 12:55:05,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 141 transitions, 926 flow [2025-02-06 12:55:05,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-06 12:55:05,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-02-06 12:55:05,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 978 transitions. [2025-02-06 12:55:05,210 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7616822429906542 [2025-02-06 12:55:05,210 INFO L175 Difference]: Start difference. First operand has 124 places, 111 transitions, 572 flow. Second operand 12 states and 978 transitions. [2025-02-06 12:55:05,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 141 transitions, 926 flow [2025-02-06 12:55:05,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 141 transitions, 890 flow, removed 5 selfloop flow, removed 3 redundant places. [2025-02-06 12:55:05,219 INFO L231 Difference]: Finished difference. Result has 133 places, 108 transitions, 516 flow [2025-02-06 12:55:05,219 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=516, PETRI_PLACES=133, PETRI_TRANSITIONS=108} [2025-02-06 12:55:05,220 INFO L279 CegarLoopForPetriNet]: 109 programPoint places, 24 predicate places. [2025-02-06 12:55:05,220 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 108 transitions, 516 flow [2025-02-06 12:55:05,221 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 78.92307692307692) internal successors, (1026), 13 states have internal predecessors, (1026), 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) [2025-02-06 12:55:05,221 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:55:05,222 INFO L206 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 1, 1] [2025-02-06 12:55:05,233 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-02-06 12:55:05,426 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-02-06 12:55:05,426 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr44REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr47REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr48REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2025-02-06 12:55:05,427 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:55:05,427 INFO L85 PathProgramCache]: Analyzing trace with hash -773317380, now seen corresponding path program 3 times [2025-02-06 12:55:05,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:55:05,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278769673] [2025-02-06 12:55:05,427 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 12:55:05,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:55:05,502 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 105 statements into 11 equivalence classes. [2025-02-06 12:55:06,141 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) and asserted 105 of 105 statements. [2025-02-06 12:55:06,141 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2025-02-06 12:55:06,142 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:55:06,710 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 409 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:55:06,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:55:06,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278769673] [2025-02-06 12:55:06,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278769673] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 12:55:06,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548490898] [2025-02-06 12:55:06,711 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 12:55:06,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:55:06,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:55:06,713 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:55:06,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-06 12:55:07,032 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 105 statements into 11 equivalence classes.