./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/chl-node-trans.wvr.c --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/weaver/chl-node-trans.wvr.c -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c9008ebcceff34245d74f1892a84a552f8268a9318e8a2970f14b3ec6b594daf --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-06 13:02:12,820 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-06 13:02:12,894 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-02-06 13:02:12,903 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-06 13:02:12,905 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-06 13:02:12,933 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-06 13:02:12,933 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-06 13:02:12,933 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-06 13:02:12,934 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-06 13:02:12,934 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-06 13:02:12,934 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-06 13:02:12,934 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-06 13:02:12,934 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-06 13:02:12,934 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-06 13:02:12,934 INFO L153 SettingsManager]: * Use SBE=true [2025-02-06 13:02:12,936 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-06 13:02:12,936 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-06 13:02:12,936 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-06 13:02:12,937 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-06 13:02:12,937 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-06 13:02:12,937 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-02-06 13:02:12,937 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-02-06 13:02:12,937 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-02-06 13:02:12,937 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-06 13:02:12,938 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-02-06 13:02:12,938 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-06 13:02:12,938 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-06 13:02:12,938 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-06 13:02:12,938 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-06 13:02:12,938 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-06 13:02:12,938 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-06 13:02:12,939 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-06 13:02:12,939 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-06 13:02:12,939 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 13:02:12,939 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-06 13:02:12,939 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-06 13:02:12,939 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-06 13:02:12,939 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-06 13:02:12,939 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-06 13:02:12,940 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-06 13:02:12,940 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-06 13:02:12,940 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-06 13:02:12,940 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 -> c9008ebcceff34245d74f1892a84a552f8268a9318e8a2970f14b3ec6b594daf [2025-02-06 13:02:13,254 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-06 13:02:13,261 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-06 13:02:13,266 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-06 13:02:13,268 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-06 13:02:13,269 INFO L274 PluginConnector]: CDTParser initialized [2025-02-06 13:02:13,270 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-node-trans.wvr.c [2025-02-06 13:02:14,714 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/e612dd85e/45e01afb8bde4df9aa7f908742aafe23/FLAGcb927bdff [2025-02-06 13:02:14,973 INFO L384 CDTParser]: Found 1 translation units. [2025-02-06 13:02:14,973 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/chl-node-trans.wvr.c [2025-02-06 13:02:14,985 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/e612dd85e/45e01afb8bde4df9aa7f908742aafe23/FLAGcb927bdff [2025-02-06 13:02:15,282 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/e612dd85e/45e01afb8bde4df9aa7f908742aafe23 [2025-02-06 13:02:15,284 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-06 13:02:15,286 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-06 13:02:15,288 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-06 13:02:15,289 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-06 13:02:15,293 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-06 13:02:15,294 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 01:02:15" (1/1) ... [2025-02-06 13:02:15,295 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d02c575 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:15, skipping insertion in model container [2025-02-06 13:02:15,295 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 01:02:15" (1/1) ... [2025-02-06 13:02:15,320 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-06 13:02:15,481 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-02-06 13:02:15,485 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-02-06 13:02:15,490 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 13:02:15,504 INFO L200 MainTranslator]: Completed pre-run [2025-02-06 13:02:15,535 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 13:02:15,555 INFO L204 MainTranslator]: Completed translation [2025-02-06 13:02:15,556 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:15 WrapperNode [2025-02-06 13:02:15,556 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-06 13:02:15,557 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-06 13:02:15,558 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-06 13:02:15,558 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-06 13:02:15,564 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:15" (1/1) ... [2025-02-06 13:02:15,572 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:15" (1/1) ... [2025-02-06 13:02:15,600 INFO L138 Inliner]: procedures = 26, calls = 52, calls flagged for inlining = 23, calls inlined = 35, statements flattened = 408 [2025-02-06 13:02:15,600 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-06 13:02:15,601 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-06 13:02:15,601 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-06 13:02:15,601 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-06 13:02:15,611 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:15" (1/1) ... [2025-02-06 13:02:15,611 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:15" (1/1) ... [2025-02-06 13:02:15,617 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:15" (1/1) ... [2025-02-06 13:02:15,646 INFO L175 MemorySlicer]: Split 26 memory accesses to 3 slices as follows [2, 15, 9]. 58 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 6 writes are split as follows [0, 3, 3]. [2025-02-06 13:02:15,646 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:15" (1/1) ... [2025-02-06 13:02:15,647 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:15" (1/1) ... [2025-02-06 13:02:15,665 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:15" (1/1) ... [2025-02-06 13:02:15,667 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:15" (1/1) ... [2025-02-06 13:02:15,673 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:15" (1/1) ... [2025-02-06 13:02:15,674 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:15" (1/1) ... [2025-02-06 13:02:15,679 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-06 13:02:15,684 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-06 13:02:15,685 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-06 13:02:15,685 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-06 13:02:15,686 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:15" (1/1) ... [2025-02-06 13:02:15,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 13:02:15,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:02:15,717 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 13:02:15,725 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 13:02:15,745 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-06 13:02:15,745 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-06 13:02:15,745 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-06 13:02:15,745 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-02-06 13:02:15,746 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-06 13:02:15,746 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-06 13:02:15,746 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-02-06 13:02:15,747 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-02-06 13:02:15,747 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-02-06 13:02:15,747 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-02-06 13:02:15,747 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-02-06 13:02:15,747 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-02-06 13:02:15,747 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-02-06 13:02:15,747 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-06 13:02:15,747 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-06 13:02:15,747 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-02-06 13:02:15,747 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-06 13:02:15,748 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-06 13:02:15,748 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-06 13:02:15,749 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 13:02:15,894 INFO L257 CfgBuilder]: Building ICFG [2025-02-06 13:02:15,896 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-06 13:02:16,585 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-06 13:02:16,585 INFO L308 CfgBuilder]: Performing block encoding [2025-02-06 13:02:16,977 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-06 13:02:16,978 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-06 13:02:16,978 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 01:02:16 BoogieIcfgContainer [2025-02-06 13:02:16,978 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-06 13:02:16,980 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-06 13:02:16,980 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-06 13:02:16,984 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-06 13:02:16,985 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.02 01:02:15" (1/3) ... [2025-02-06 13:02:16,985 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72fe9835 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 01:02:16, skipping insertion in model container [2025-02-06 13:02:16,985 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:15" (2/3) ... [2025-02-06 13:02:16,986 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72fe9835 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 01:02:16, skipping insertion in model container [2025-02-06 13:02:16,986 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 01:02:16" (3/3) ... [2025-02-06 13:02:16,987 INFO L128 eAbstractionObserver]: Analyzing ICFG chl-node-trans.wvr.c [2025-02-06 13:02:17,003 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-06 13:02:17,005 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG chl-node-trans.wvr.c that has 4 procedures, 109 locations, 1 initial locations, 6 loop locations, and 50 error locations. [2025-02-06 13:02:17,006 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-06 13:02:17,103 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2025-02-06 13:02:17,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 118 places, 120 transitions, 261 flow [2025-02-06 13:02:17,197 INFO L124 PetriNetUnfolderBase]: 12/117 cut-off events. [2025-02-06 13:02:17,200 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-02-06 13:02:17,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130 conditions, 117 events. 12/117 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 385 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 87. Up to 2 conditions per place. [2025-02-06 13:02:17,210 INFO L82 GeneralOperation]: Start removeDead. Operand has 118 places, 120 transitions, 261 flow [2025-02-06 13:02:17,216 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 114 places, 116 transitions, 250 flow [2025-02-06 13:02:17,225 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-06 13:02:17,238 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;@7007257b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-06 13:02:17,239 INFO L334 AbstractCegarLoop]: Starting to check reachability of 89 error locations. [2025-02-06 13:02:17,243 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-06 13:02:17,244 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-02-06 13:02:17,244 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-06 13:02:17,244 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:17,245 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-06 13:02:17,245 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-02-06 13:02:17,250 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:17,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1218081, now seen corresponding path program 1 times [2025-02-06 13:02:17,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:17,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038127937] [2025-02-06 13:02:17,259 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:17,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:17,339 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-06 13:02:17,374 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-06 13:02:17,375 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:17,375 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:17,552 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 13:02:17,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:17,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038127937] [2025-02-06 13:02:17,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038127937] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:02:17,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:02:17,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-02-06 13:02:17,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745504724] [2025-02-06 13:02:17,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:02:17,563 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 13:02:17,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:17,589 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 13:02:17,589 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 13:02:17,683 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2025-02-06 13:02:17,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 116 transitions, 250 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 13:02:17,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:17,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2025-02-06 13:02:17,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:18,540 INFO L124 PetriNetUnfolderBase]: 2263/4993 cut-off events. [2025-02-06 13:02:18,540 INFO L125 PetriNetUnfolderBase]: For 159/159 co-relation queries the response was YES. [2025-02-06 13:02:18,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8166 conditions, 4993 events. 2263/4993 cut-off events. For 159/159 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 40782 event pairs, 1414 based on Foata normal form. 1/3839 useless extension candidates. Maximal degree in co-relation 7651. Up to 3012 conditions per place. [2025-02-06 13:02:18,605 INFO L140 encePairwiseOnDemand]: 114/120 looper letters, 48 selfloop transitions, 2 changer transitions 0/111 dead transitions. [2025-02-06 13:02:18,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 111 transitions, 340 flow [2025-02-06 13:02:18,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 13:02:18,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 13:02:18,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 249 transitions. [2025-02-06 13:02:18,623 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6916666666666667 [2025-02-06 13:02:18,624 INFO L175 Difference]: Start difference. First operand has 114 places, 116 transitions, 250 flow. Second operand 3 states and 249 transitions. [2025-02-06 13:02:18,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 111 transitions, 340 flow [2025-02-06 13:02:18,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 111 transitions, 328 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-02-06 13:02:18,642 INFO L231 Difference]: Finished difference. Result has 105 places, 111 transitions, 232 flow [2025-02-06 13:02:18,645 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=232, PETRI_PLACES=105, PETRI_TRANSITIONS=111} [2025-02-06 13:02:18,649 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, -9 predicate places. [2025-02-06 13:02:18,651 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 111 transitions, 232 flow [2025-02-06 13:02:18,651 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 13:02:18,652 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:18,652 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-06 13:02:18,652 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-06 13:02:18,653 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-02-06 13:02:18,653 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:18,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1218082, now seen corresponding path program 1 times [2025-02-06 13:02:18,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:18,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158059226] [2025-02-06 13:02:18,654 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:18,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:18,664 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-06 13:02:18,689 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-06 13:02:18,689 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:18,689 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:19,079 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 13:02:19,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:19,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158059226] [2025-02-06 13:02:19,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158059226] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:02:19,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:02:19,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 13:02:19,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073442073] [2025-02-06 13:02:19,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:02:19,080 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:02:19,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:19,081 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:02:19,081 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:02:19,181 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2025-02-06 13:02:19,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 111 transitions, 232 flow. Second operand has 4 states, 4 states have (on average 65.75) internal successors, (263), 4 states have internal predecessors, (263), 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 13:02:19,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:19,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2025-02-06 13:02:19,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:19,741 INFO L124 PetriNetUnfolderBase]: 2263/4995 cut-off events. [2025-02-06 13:02:19,741 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2025-02-06 13:02:19,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8073 conditions, 4995 events. 2263/4995 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 40852 event pairs, 1414 based on Foata normal form. 0/3838 useless extension candidates. Maximal degree in co-relation 8038. Up to 3024 conditions per place. [2025-02-06 13:02:19,785 INFO L140 encePairwiseOnDemand]: 116/120 looper letters, 53 selfloop transitions, 2 changer transitions 0/113 dead transitions. [2025-02-06 13:02:19,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 113 transitions, 346 flow [2025-02-06 13:02:19,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 13:02:19,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 13:02:19,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 252 transitions. [2025-02-06 13:02:19,789 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7 [2025-02-06 13:02:19,789 INFO L175 Difference]: Start difference. First operand has 105 places, 111 transitions, 232 flow. Second operand 3 states and 252 transitions. [2025-02-06 13:02:19,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 113 transitions, 346 flow [2025-02-06 13:02:19,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 113 transitions, 342 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:02:19,794 INFO L231 Difference]: Finished difference. Result has 106 places, 112 transitions, 242 flow [2025-02-06 13:02:19,795 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=242, PETRI_PLACES=106, PETRI_TRANSITIONS=112} [2025-02-06 13:02:19,796 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, -8 predicate places. [2025-02-06 13:02:19,796 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 112 transitions, 242 flow [2025-02-06 13:02:19,797 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 65.75) internal successors, (263), 4 states have internal predecessors, (263), 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 13:02:19,798 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:19,799 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2025-02-06 13:02:19,799 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-06 13:02:19,799 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-02-06 13:02:19,799 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:19,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1170614776, now seen corresponding path program 1 times [2025-02-06 13:02:19,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:19,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758451823] [2025-02-06 13:02:19,799 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:19,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:19,812 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-06 13:02:19,832 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-06 13:02:19,834 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:19,834 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:20,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:02:20,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:20,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758451823] [2025-02-06 13:02:20,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758451823] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:02:20,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770161729] [2025-02-06 13:02:20,122 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:20,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:20,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:02:20,125 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 13:02:20,127 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 13:02:20,208 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-06 13:02:20,233 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-06 13:02:20,233 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:20,233 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:20,236 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-02-06 13:02:20,243 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:02:20,318 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2025-02-06 13:02:20,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:02:20,516 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:02:20,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:02:20,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770161729] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:02:20,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:02:20,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2025-02-06 13:02:20,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445287833] [2025-02-06 13:02:20,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:02:20,633 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-06 13:02:20,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:20,634 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-06 13:02:20,635 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2025-02-06 13:02:21,294 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2025-02-06 13:02:21,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 112 transitions, 242 flow. Second operand has 11 states, 11 states have (on average 66.36363636363636) internal successors, (730), 11 states have internal predecessors, (730), 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 13:02:21,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:21,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2025-02-06 13:02:21,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:21,941 INFO L124 PetriNetUnfolderBase]: 2263/4994 cut-off events. [2025-02-06 13:02:21,941 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2025-02-06 13:02:21,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8075 conditions, 4994 events. 2263/4994 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 40885 event pairs, 1414 based on Foata normal form. 0/3838 useless extension candidates. Maximal degree in co-relation 8062. Up to 3018 conditions per place. [2025-02-06 13:02:21,980 INFO L140 encePairwiseOnDemand]: 113/120 looper letters, 47 selfloop transitions, 7 changer transitions 0/112 dead transitions. [2025-02-06 13:02:21,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 112 transitions, 348 flow [2025-02-06 13:02:21,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 13:02:21,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-06 13:02:21,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 445 transitions. [2025-02-06 13:02:21,984 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6180555555555556 [2025-02-06 13:02:21,984 INFO L175 Difference]: Start difference. First operand has 106 places, 112 transitions, 242 flow. Second operand 6 states and 445 transitions. [2025-02-06 13:02:21,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 112 transitions, 348 flow [2025-02-06 13:02:21,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 112 transitions, 346 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 13:02:21,987 INFO L231 Difference]: Finished difference. Result has 110 places, 112 transitions, 258 flow [2025-02-06 13:02:21,987 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=258, PETRI_PLACES=110, PETRI_TRANSITIONS=112} [2025-02-06 13:02:21,988 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, -4 predicate places. [2025-02-06 13:02:21,988 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 112 transitions, 258 flow [2025-02-06 13:02:21,989 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 66.36363636363636) internal successors, (730), 11 states have internal predecessors, (730), 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 13:02:21,989 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:21,989 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-02-06 13:02:21,997 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 13:02:22,191 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:22,192 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-02-06 13:02:22,192 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:22,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1929322272, now seen corresponding path program 1 times [2025-02-06 13:02:22,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:22,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141406993] [2025-02-06 13:02:22,192 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:22,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:22,201 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-06 13:02:22,217 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-06 13:02:22,217 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:22,217 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:22,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:02:22,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:22,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141406993] [2025-02-06 13:02:22,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141406993] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:02:22,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:02:22,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 13:02:22,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858705827] [2025-02-06 13:02:22,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:02:22,422 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:02:22,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:22,422 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:02:22,422 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-06 13:02:22,535 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2025-02-06 13:02:22,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 112 transitions, 258 flow. Second operand has 5 states, 5 states have (on average 66.2) internal successors, (331), 5 states have internal predecessors, (331), 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 13:02:22,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:22,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2025-02-06 13:02:22,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:23,103 INFO L124 PetriNetUnfolderBase]: 2264/4997 cut-off events. [2025-02-06 13:02:23,104 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2025-02-06 13:02:23,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8091 conditions, 4997 events. 2264/4997 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 40896 event pairs, 1414 based on Foata normal form. 1/3843 useless extension candidates. Maximal degree in co-relation 8062. Up to 3023 conditions per place. [2025-02-06 13:02:23,145 INFO L140 encePairwiseOnDemand]: 114/120 looper letters, 52 selfloop transitions, 5 changer transitions 0/115 dead transitions. [2025-02-06 13:02:23,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 115 transitions, 378 flow [2025-02-06 13:02:23,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:02:23,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:02:23,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 318 transitions. [2025-02-06 13:02:23,147 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6625 [2025-02-06 13:02:23,147 INFO L175 Difference]: Start difference. First operand has 110 places, 112 transitions, 258 flow. Second operand 4 states and 318 transitions. [2025-02-06 13:02:23,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 115 transitions, 378 flow [2025-02-06 13:02:23,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 115 transitions, 366 flow, removed 2 selfloop flow, removed 3 redundant places. [2025-02-06 13:02:23,149 INFO L231 Difference]: Finished difference. Result has 111 places, 114 transitions, 271 flow [2025-02-06 13:02:23,151 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=271, PETRI_PLACES=111, PETRI_TRANSITIONS=114} [2025-02-06 13:02:23,153 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, -3 predicate places. [2025-02-06 13:02:23,153 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 114 transitions, 271 flow [2025-02-06 13:02:23,154 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 66.2) internal successors, (331), 5 states have internal predecessors, (331), 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 13:02:23,154 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:23,154 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:23,154 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-02-06 13:02:23,154 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-02-06 13:02:23,155 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:23,155 INFO L85 PathProgramCache]: Analyzing trace with hash -320547379, now seen corresponding path program 1 times [2025-02-06 13:02:23,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:23,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828979951] [2025-02-06 13:02:23,155 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:23,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:23,163 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-02-06 13:02:23,173 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-02-06 13:02:23,174 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:23,174 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:23,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:02:23,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:23,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828979951] [2025-02-06 13:02:23,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828979951] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:02:23,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:02:23,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 13:02:23,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801754301] [2025-02-06 13:02:23,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:02:23,257 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:02:23,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:23,260 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:02:23,260 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:02:23,285 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 120 [2025-02-06 13:02:23,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 114 transitions, 271 flow. Second operand has 4 states, 4 states have (on average 69.5) internal successors, (278), 4 states have internal predecessors, (278), 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 13:02:23,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:23,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 120 [2025-02-06 13:02:23,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:23,749 INFO L124 PetriNetUnfolderBase]: 2263/4996 cut-off events. [2025-02-06 13:02:23,750 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2025-02-06 13:02:23,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8091 conditions, 4996 events. 2263/4996 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 40866 event pairs, 1414 based on Foata normal form. 1/3844 useless extension candidates. Maximal degree in co-relation 8063. Up to 3020 conditions per place. [2025-02-06 13:02:23,785 INFO L140 encePairwiseOnDemand]: 115/120 looper letters, 50 selfloop transitions, 4 changer transitions 0/114 dead transitions. [2025-02-06 13:02:23,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 114 transitions, 376 flow [2025-02-06 13:02:23,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:02:23,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:02:23,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 327 transitions. [2025-02-06 13:02:23,787 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.68125 [2025-02-06 13:02:23,787 INFO L175 Difference]: Start difference. First operand has 111 places, 114 transitions, 271 flow. Second operand 4 states and 327 transitions. [2025-02-06 13:02:23,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 114 transitions, 376 flow [2025-02-06 13:02:23,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 114 transitions, 372 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:02:23,789 INFO L231 Difference]: Finished difference. Result has 112 places, 113 transitions, 270 flow [2025-02-06 13:02:23,790 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=270, PETRI_PLACES=112, PETRI_TRANSITIONS=113} [2025-02-06 13:02:23,790 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, -2 predicate places. [2025-02-06 13:02:23,790 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 113 transitions, 270 flow [2025-02-06 13:02:23,793 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.5) internal successors, (278), 4 states have internal predecessors, (278), 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 13:02:23,793 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:23,794 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:23,794 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-02-06 13:02:23,794 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-02-06 13:02:23,794 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:23,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1347131331, now seen corresponding path program 1 times [2025-02-06 13:02:23,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:23,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067908404] [2025-02-06 13:02:23,795 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:23,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:23,803 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-06 13:02:23,825 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-06 13:02:23,825 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:23,825 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:24,086 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:02:24,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:24,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067908404] [2025-02-06 13:02:24,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067908404] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:02:24,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278830885] [2025-02-06 13:02:24,086 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:24,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:24,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:02:24,089 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 13:02:24,092 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 13:02:24,153 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-06 13:02:24,174 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-06 13:02:24,174 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:24,174 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:24,176 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-06 13:02:24,177 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:02:24,204 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-02-06 13:02:24,305 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:02:24,306 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:02:24,428 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:02:24,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278830885] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:02:24,429 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:02:24,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2025-02-06 13:02:24,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840235407] [2025-02-06 13:02:24,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:02:24,429 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-06 13:02:24,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:24,430 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-06 13:02:24,430 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2025-02-06 13:02:25,229 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2025-02-06 13:02:25,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 113 transitions, 270 flow. Second operand has 13 states, 13 states have (on average 66.61538461538461) internal successors, (866), 13 states have internal predecessors, (866), 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 13:02:25,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:25,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2025-02-06 13:02:25,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:25,917 INFO L124 PetriNetUnfolderBase]: 2265/5001 cut-off events. [2025-02-06 13:02:25,917 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2025-02-06 13:02:25,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8111 conditions, 5001 events. 2265/5001 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 40853 event pairs, 1414 based on Foata normal form. 0/3847 useless extension candidates. Maximal degree in co-relation 8069. Up to 3016 conditions per place. [2025-02-06 13:02:25,957 INFO L140 encePairwiseOnDemand]: 112/120 looper letters, 45 selfloop transitions, 16 changer transitions 0/119 dead transitions. [2025-02-06 13:02:25,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 119 transitions, 417 flow [2025-02-06 13:02:25,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-06 13:02:25,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-06 13:02:25,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 648 transitions. [2025-02-06 13:02:25,963 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6 [2025-02-06 13:02:25,963 INFO L175 Difference]: Start difference. First operand has 112 places, 113 transitions, 270 flow. Second operand 9 states and 648 transitions. [2025-02-06 13:02:25,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 119 transitions, 417 flow [2025-02-06 13:02:25,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 119 transitions, 407 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-06 13:02:25,968 INFO L231 Difference]: Finished difference. Result has 116 places, 119 transitions, 317 flow [2025-02-06 13:02:25,968 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=257, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=317, PETRI_PLACES=116, PETRI_TRANSITIONS=119} [2025-02-06 13:02:25,968 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, 2 predicate places. [2025-02-06 13:02:25,968 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 119 transitions, 317 flow [2025-02-06 13:02:25,969 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 66.61538461538461) internal successors, (866), 13 states have internal predecessors, (866), 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 13:02:25,969 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:25,969 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:25,979 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-02-06 13:02:26,176 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:26,176 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-02-06 13:02:26,177 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:26,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1188606032, now seen corresponding path program 1 times [2025-02-06 13:02:26,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:26,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594994208] [2025-02-06 13:02:26,177 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:26,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:26,186 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-06 13:02:26,200 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-06 13:02:26,204 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:26,204 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:26,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:02:26,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:26,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594994208] [2025-02-06 13:02:26,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594994208] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:02:26,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:02:26,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 13:02:26,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89582461] [2025-02-06 13:02:26,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:02:26,402 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:02:26,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:26,403 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:02:26,403 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-06 13:02:26,553 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2025-02-06 13:02:26,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 119 transitions, 317 flow. Second operand has 5 states, 5 states have (on average 66.8) internal successors, (334), 5 states have internal predecessors, (334), 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 13:02:26,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:26,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2025-02-06 13:02:26,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:26,997 INFO L124 PetriNetUnfolderBase]: 2265/5003 cut-off events. [2025-02-06 13:02:26,997 INFO L125 PetriNetUnfolderBase]: For 37/37 co-relation queries the response was YES. [2025-02-06 13:02:27,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8126 conditions, 5003 events. 2265/5003 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 40872 event pairs, 1414 based on Foata normal form. 0/3849 useless extension candidates. Maximal degree in co-relation 8080. Up to 3028 conditions per place. [2025-02-06 13:02:27,034 INFO L140 encePairwiseOnDemand]: 114/120 looper letters, 58 selfloop transitions, 5 changer transitions 0/121 dead transitions. [2025-02-06 13:02:27,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 121 transitions, 447 flow [2025-02-06 13:02:27,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:02:27,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:02:27,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 317 transitions. [2025-02-06 13:02:27,038 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6604166666666667 [2025-02-06 13:02:27,041 INFO L175 Difference]: Start difference. First operand has 116 places, 119 transitions, 317 flow. Second operand 4 states and 317 transitions. [2025-02-06 13:02:27,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 121 transitions, 447 flow [2025-02-06 13:02:27,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 121 transitions, 428 flow, removed 4 selfloop flow, removed 3 redundant places. [2025-02-06 13:02:27,043 INFO L231 Difference]: Finished difference. Result has 117 places, 120 transitions, 321 flow [2025-02-06 13:02:27,044 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=321, PETRI_PLACES=117, PETRI_TRANSITIONS=120} [2025-02-06 13:02:27,044 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, 3 predicate places. [2025-02-06 13:02:27,044 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 120 transitions, 321 flow [2025-02-06 13:02:27,045 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 66.8) internal successors, (334), 5 states have internal predecessors, (334), 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 13:02:27,045 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:27,045 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:27,045 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-02-06 13:02:27,045 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-02-06 13:02:27,046 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:27,046 INFO L85 PathProgramCache]: Analyzing trace with hash -210864714, now seen corresponding path program 1 times [2025-02-06 13:02:27,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:27,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105468107] [2025-02-06 13:02:27,046 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:27,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:27,053 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-06 13:02:27,069 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-06 13:02:27,069 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:27,072 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:27,302 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:02:27,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:27,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105468107] [2025-02-06 13:02:27,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105468107] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:02:27,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53349036] [2025-02-06 13:02:27,303 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:27,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:27,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:02:27,305 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 13:02:27,307 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 13:02:27,374 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-06 13:02:27,453 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-06 13:02:27,453 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:27,453 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:27,458 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-06 13:02:27,460 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:02:27,493 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-02-06 13:02:27,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:02:27,596 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:02:27,726 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:02:27,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53349036] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:02:27,726 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:02:27,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2025-02-06 13:02:27,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128183098] [2025-02-06 13:02:27,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:02:27,727 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-06 13:02:27,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:27,728 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-06 13:02:27,728 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2025-02-06 13:02:28,429 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2025-02-06 13:02:28,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 120 transitions, 321 flow. Second operand has 13 states, 13 states have (on average 67.07692307692308) internal successors, (872), 13 states have internal predecessors, (872), 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 13:02:28,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:28,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2025-02-06 13:02:28,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:29,071 INFO L124 PetriNetUnfolderBase]: 2266/5005 cut-off events. [2025-02-06 13:02:29,072 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2025-02-06 13:02:29,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8131 conditions, 5005 events. 2266/5005 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 40812 event pairs, 1414 based on Foata normal form. 0/3851 useless extension candidates. Maximal degree in co-relation 8086. Up to 3020 conditions per place. [2025-02-06 13:02:29,101 INFO L140 encePairwiseOnDemand]: 111/120 looper letters, 47 selfloop transitions, 18 changer transitions 0/123 dead transitions. [2025-02-06 13:02:29,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 123 transitions, 458 flow [2025-02-06 13:02:29,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-06 13:02:29,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-06 13:02:29,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 647 transitions. [2025-02-06 13:02:29,104 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5990740740740741 [2025-02-06 13:02:29,104 INFO L175 Difference]: Start difference. First operand has 117 places, 120 transitions, 321 flow. Second operand 9 states and 647 transitions. [2025-02-06 13:02:29,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 123 transitions, 458 flow [2025-02-06 13:02:29,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 123 transitions, 453 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:02:29,106 INFO L231 Difference]: Finished difference. Result has 121 places, 123 transitions, 359 flow [2025-02-06 13:02:29,106 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=359, PETRI_PLACES=121, PETRI_TRANSITIONS=123} [2025-02-06 13:02:29,107 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, 7 predicate places. [2025-02-06 13:02:29,107 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 123 transitions, 359 flow [2025-02-06 13:02:29,108 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 67.07692307692308) internal successors, (872), 13 states have internal predecessors, (872), 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 13:02:29,108 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:29,108 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:29,117 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 13:02:29,308 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:29,309 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-02-06 13:02:29,309 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:29,309 INFO L85 PathProgramCache]: Analyzing trace with hash 2053131108, now seen corresponding path program 1 times [2025-02-06 13:02:29,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:29,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875728637] [2025-02-06 13:02:29,309 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:29,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:29,319 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-06 13:02:29,329 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-06 13:02:29,330 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:29,330 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:29,546 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:02:29,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:29,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875728637] [2025-02-06 13:02:29,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875728637] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:02:29,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859090558] [2025-02-06 13:02:29,547 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:29,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:29,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:02:29,549 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 13:02:29,551 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 13:02:29,619 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-06 13:02:29,644 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-06 13:02:29,645 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:29,645 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:29,649 INFO L256 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-02-06 13:02:29,651 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:02:29,718 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-02-06 13:02:29,726 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:02:29,726 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 13:02:29,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859090558] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:02:29,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-06 13:02:29,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2025-02-06 13:02:29,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124413930] [2025-02-06 13:02:29,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:02:29,727 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:02:29,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:29,727 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:02:29,727 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-02-06 13:02:29,784 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2025-02-06 13:02:29,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 123 transitions, 359 flow. Second operand has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 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 13:02:29,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:29,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2025-02-06 13:02:29,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:30,195 INFO L124 PetriNetUnfolderBase]: 2267/5009 cut-off events. [2025-02-06 13:02:30,195 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2025-02-06 13:02:30,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8157 conditions, 5009 events. 2267/5009 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 40876 event pairs, 1414 based on Foata normal form. 0/3854 useless extension candidates. Maximal degree in co-relation 8105. Up to 3038 conditions per place. [2025-02-06 13:02:30,223 INFO L140 encePairwiseOnDemand]: 115/120 looper letters, 66 selfloop transitions, 5 changer transitions 0/126 dead transitions. [2025-02-06 13:02:30,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 126 transitions, 507 flow [2025-02-06 13:02:30,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:02:30,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:02:30,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 317 transitions. [2025-02-06 13:02:30,224 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6604166666666667 [2025-02-06 13:02:30,224 INFO L175 Difference]: Start difference. First operand has 121 places, 123 transitions, 359 flow. Second operand 4 states and 317 transitions. [2025-02-06 13:02:30,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 126 transitions, 507 flow [2025-02-06 13:02:30,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 126 transitions, 482 flow, removed 4 selfloop flow, removed 4 redundant places. [2025-02-06 13:02:30,227 INFO L231 Difference]: Finished difference. Result has 121 places, 125 transitions, 358 flow [2025-02-06 13:02:30,227 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=358, PETRI_PLACES=121, PETRI_TRANSITIONS=125} [2025-02-06 13:02:30,228 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, 7 predicate places. [2025-02-06 13:02:30,228 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 125 transitions, 358 flow [2025-02-06 13:02:30,228 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 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 13:02:30,228 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:30,228 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:30,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-02-06 13:02:30,429 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,SelfDestructingSolverStorable8 [2025-02-06 13:02:30,429 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-02-06 13:02:30,430 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:30,430 INFO L85 PathProgramCache]: Analyzing trace with hash 2053131107, now seen corresponding path program 1 times [2025-02-06 13:02:30,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:30,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551052734] [2025-02-06 13:02:30,430 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:30,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:30,439 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-06 13:02:30,446 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-06 13:02:30,446 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:30,446 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:30,489 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:02:30,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:30,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551052734] [2025-02-06 13:02:30,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551052734] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:02:30,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:02:30,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 13:02:30,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632136760] [2025-02-06 13:02:30,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:02:30,491 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 13:02:30,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:30,491 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 13:02:30,491 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 13:02:30,533 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2025-02-06 13:02:30,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 125 transitions, 358 flow. Second operand has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 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 13:02:30,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:30,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2025-02-06 13:02:30,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:30,900 INFO L124 PetriNetUnfolderBase]: 2267/5005 cut-off events. [2025-02-06 13:02:30,900 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2025-02-06 13:02:30,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8147 conditions, 5005 events. 2267/5005 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 40850 event pairs, 1414 based on Foata normal form. 2/3855 useless extension candidates. Maximal degree in co-relation 8098. Up to 3026 conditions per place. [2025-02-06 13:02:30,929 INFO L140 encePairwiseOnDemand]: 115/120 looper letters, 64 selfloop transitions, 3 changer transitions 0/122 dead transitions. [2025-02-06 13:02:30,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 122 transitions, 486 flow [2025-02-06 13:02:30,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 13:02:30,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 13:02:30,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 248 transitions. [2025-02-06 13:02:30,931 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6888888888888889 [2025-02-06 13:02:30,931 INFO L175 Difference]: Start difference. First operand has 121 places, 125 transitions, 358 flow. Second operand 3 states and 248 transitions. [2025-02-06 13:02:30,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 122 transitions, 486 flow [2025-02-06 13:02:30,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 122 transitions, 480 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:02:30,933 INFO L231 Difference]: Finished difference. Result has 118 places, 122 transitions, 352 flow [2025-02-06 13:02:30,934 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=352, PETRI_PLACES=118, PETRI_TRANSITIONS=122} [2025-02-06 13:02:30,934 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, 4 predicate places. [2025-02-06 13:02:30,935 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 122 transitions, 352 flow [2025-02-06 13:02:30,936 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 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 13:02:30,936 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:30,936 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:30,936 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-02-06 13:02:30,936 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-02-06 13:02:30,936 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:30,936 INFO L85 PathProgramCache]: Analyzing trace with hash -777442915, now seen corresponding path program 1 times [2025-02-06 13:02:30,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:30,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356293861] [2025-02-06 13:02:30,936 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:30,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:30,947 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-02-06 13:02:30,956 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-02-06 13:02:30,956 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:30,956 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:31,025 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:02:31,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:31,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356293861] [2025-02-06 13:02:31,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356293861] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:02:31,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:02:31,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 13:02:31,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928712499] [2025-02-06 13:02:31,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:02:31,027 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:02:31,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:31,029 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:02:31,029 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:02:31,058 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 120 [2025-02-06 13:02:31,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 122 transitions, 352 flow. Second operand has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 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 13:02:31,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:31,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 120 [2025-02-06 13:02:31,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:31,511 INFO L124 PetriNetUnfolderBase]: 2266/5004 cut-off events. [2025-02-06 13:02:31,512 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2025-02-06 13:02:31,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8144 conditions, 5004 events. 2266/5004 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 40854 event pairs, 1414 based on Foata normal form. 1/3854 useless extension candidates. Maximal degree in co-relation 8096. Up to 3034 conditions per place. [2025-02-06 13:02:31,543 INFO L140 encePairwiseOnDemand]: 116/120 looper letters, 63 selfloop transitions, 4 changer transitions 0/122 dead transitions. [2025-02-06 13:02:31,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 122 transitions, 484 flow [2025-02-06 13:02:31,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:02:31,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:02:31,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 325 transitions. [2025-02-06 13:02:31,545 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6770833333333334 [2025-02-06 13:02:31,545 INFO L175 Difference]: Start difference. First operand has 118 places, 122 transitions, 352 flow. Second operand 4 states and 325 transitions. [2025-02-06 13:02:31,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 122 transitions, 484 flow [2025-02-06 13:02:31,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 122 transitions, 478 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:02:31,548 INFO L231 Difference]: Finished difference. Result has 119 places, 121 transitions, 350 flow [2025-02-06 13:02:31,549 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=350, PETRI_PLACES=119, PETRI_TRANSITIONS=121} [2025-02-06 13:02:31,549 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, 5 predicate places. [2025-02-06 13:02:31,549 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 121 transitions, 350 flow [2025-02-06 13:02:31,549 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 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 13:02:31,550 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:31,550 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:31,550 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2025-02-06 13:02:31,550 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-02-06 13:02:31,550 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:31,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1669043914, now seen corresponding path program 1 times [2025-02-06 13:02:31,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:31,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109076987] [2025-02-06 13:02:31,551 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:31,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:31,561 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-06 13:02:31,570 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-06 13:02:31,571 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:31,571 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:31,708 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:02:31,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:31,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109076987] [2025-02-06 13:02:31,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109076987] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:02:31,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619019253] [2025-02-06 13:02:31,709 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:31,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:31,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:02:31,711 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 13:02:31,714 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 13:02:31,789 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-06 13:02:31,817 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-06 13:02:31,817 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:31,817 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:31,819 INFO L256 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-06 13:02:31,820 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:02:31,891 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:02:31,892 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:02:31,954 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:02:31,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619019253] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:02:31,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:02:31,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2025-02-06 13:02:31,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493988823] [2025-02-06 13:02:31,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:02:31,955 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-06 13:02:31,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:31,957 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-06 13:02:31,957 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2025-02-06 13:02:32,142 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 120 [2025-02-06 13:02:32,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 121 transitions, 350 flow. Second operand has 14 states, 14 states have (on average 70.0) internal successors, (980), 14 states have internal predecessors, (980), 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 13:02:32,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:32,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 120 [2025-02-06 13:02:32,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:32,851 INFO L124 PetriNetUnfolderBase]: 4460/9788 cut-off events. [2025-02-06 13:02:32,851 INFO L125 PetriNetUnfolderBase]: For 76/76 co-relation queries the response was YES. [2025-02-06 13:02:32,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15944 conditions, 9788 events. 4460/9788 cut-off events. For 76/76 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 89607 event pairs, 2808 based on Foata normal form. 1/7627 useless extension candidates. Maximal degree in co-relation 8089. Up to 3008 conditions per place. [2025-02-06 13:02:32,895 INFO L140 encePairwiseOnDemand]: 108/120 looper letters, 88 selfloop transitions, 34 changer transitions 0/177 dead transitions. [2025-02-06 13:02:32,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 177 transitions, 758 flow [2025-02-06 13:02:32,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-06 13:02:32,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-06 13:02:32,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 782 transitions. [2025-02-06 13:02:32,897 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6516666666666666 [2025-02-06 13:02:32,897 INFO L175 Difference]: Start difference. First operand has 119 places, 121 transitions, 350 flow. Second operand 10 states and 782 transitions. [2025-02-06 13:02:32,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 177 transitions, 758 flow [2025-02-06 13:02:32,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 177 transitions, 744 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-06 13:02:32,900 INFO L231 Difference]: Finished difference. Result has 128 places, 137 transitions, 506 flow [2025-02-06 13:02:32,901 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=506, PETRI_PLACES=128, PETRI_TRANSITIONS=137} [2025-02-06 13:02:32,903 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, 14 predicate places. [2025-02-06 13:02:32,903 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 137 transitions, 506 flow [2025-02-06 13:02:32,904 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 70.0) internal successors, (980), 14 states have internal predecessors, (980), 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 13:02:32,904 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:32,904 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:32,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-02-06 13:02:33,108 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-02-06 13:02:33,108 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-02-06 13:02:33,108 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:33,108 INFO L85 PathProgramCache]: Analyzing trace with hash 200755959, now seen corresponding path program 1 times [2025-02-06 13:02:33,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:33,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578894730] [2025-02-06 13:02:33,109 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:33,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:33,120 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-06 13:02:33,134 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-06 13:02:33,134 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:33,134 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:33,319 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:02:33,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:33,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578894730] [2025-02-06 13:02:33,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578894730] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:02:33,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631838785] [2025-02-06 13:02:33,320 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:33,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:33,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:02:33,322 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:02:33,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-06 13:02:33,393 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-06 13:02:33,438 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-06 13:02:33,438 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:33,438 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:33,440 INFO L256 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-02-06 13:02:33,441 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:02:33,513 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-02-06 13:02:33,519 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-06 13:02:33,519 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 13:02:33,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631838785] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:02:33,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-06 13:02:33,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2025-02-06 13:02:33,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715433964] [2025-02-06 13:02:33,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:02:33,520 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:02:33,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:33,520 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:02:33,520 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2025-02-06 13:02:33,585 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2025-02-06 13:02:33,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 137 transitions, 506 flow. Second operand has 4 states, 4 states have (on average 68.75) internal successors, (275), 4 states have internal predecessors, (275), 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 13:02:33,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:33,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2025-02-06 13:02:33,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:34,173 INFO L124 PetriNetUnfolderBase]: 4530/10002 cut-off events. [2025-02-06 13:02:34,173 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2025-02-06 13:02:34,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16298 conditions, 10002 events. 4530/10002 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 91853 event pairs, 2828 based on Foata normal form. 0/7699 useless extension candidates. Maximal degree in co-relation 8121. Up to 6070 conditions per place. [2025-02-06 13:02:34,213 INFO L140 encePairwiseOnDemand]: 115/120 looper letters, 83 selfloop transitions, 5 changer transitions 0/140 dead transitions. [2025-02-06 13:02:34,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 140 transitions, 688 flow [2025-02-06 13:02:34,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:02:34,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:02:34,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 317 transitions. [2025-02-06 13:02:34,214 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6604166666666667 [2025-02-06 13:02:34,214 INFO L175 Difference]: Start difference. First operand has 128 places, 137 transitions, 506 flow. Second operand 4 states and 317 transitions. [2025-02-06 13:02:34,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 140 transitions, 688 flow [2025-02-06 13:02:34,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 140 transitions, 684 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-02-06 13:02:34,217 INFO L231 Difference]: Finished difference. Result has 131 places, 139 transitions, 526 flow [2025-02-06 13:02:34,217 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=502, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=526, PETRI_PLACES=131, PETRI_TRANSITIONS=139} [2025-02-06 13:02:34,218 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, 17 predicate places. [2025-02-06 13:02:34,218 INFO L471 AbstractCegarLoop]: Abstraction has has 131 places, 139 transitions, 526 flow [2025-02-06 13:02:34,218 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 68.75) internal successors, (275), 4 states have internal predecessors, (275), 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 13:02:34,218 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:34,219 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:34,227 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-02-06 13:02:34,419 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-02-06 13:02:34,419 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-02-06 13:02:34,420 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:34,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1928469381, now seen corresponding path program 1 times [2025-02-06 13:02:34,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:34,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346285396] [2025-02-06 13:02:34,420 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:34,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:34,428 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-02-06 13:02:34,436 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-02-06 13:02:34,438 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:34,438 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:34,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-06 13:02:34,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:34,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346285396] [2025-02-06 13:02:34,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346285396] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:02:34,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:02:34,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 13:02:34,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440955468] [2025-02-06 13:02:34,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:02:34,501 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:02:34,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:34,502 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:02:34,502 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:02:34,529 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 120 [2025-02-06 13:02:34,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 139 transitions, 526 flow. Second operand has 4 states, 4 states have (on average 71.75) internal successors, (287), 4 states have internal predecessors, (287), 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 13:02:34,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:34,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 120 [2025-02-06 13:02:34,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:35,224 INFO L124 PetriNetUnfolderBase]: 4528/10000 cut-off events. [2025-02-06 13:02:35,225 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2025-02-06 13:02:35,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16302 conditions, 10000 events. 4528/10000 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 91822 event pairs, 2828 based on Foata normal form. 2/7708 useless extension candidates. Maximal degree in co-relation 8122. Up to 6063 conditions per place. [2025-02-06 13:02:35,276 INFO L140 encePairwiseOnDemand]: 116/120 looper letters, 80 selfloop transitions, 4 changer transitions 0/139 dead transitions. [2025-02-06 13:02:35,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 139 transitions, 691 flow [2025-02-06 13:02:35,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:02:35,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:02:35,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 325 transitions. [2025-02-06 13:02:35,277 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6770833333333334 [2025-02-06 13:02:35,277 INFO L175 Difference]: Start difference. First operand has 131 places, 139 transitions, 526 flow. Second operand 4 states and 325 transitions. [2025-02-06 13:02:35,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 139 transitions, 691 flow [2025-02-06 13:02:35,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 139 transitions, 686 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:02:35,279 INFO L231 Difference]: Finished difference. Result has 132 places, 138 transitions, 524 flow [2025-02-06 13:02:35,280 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=516, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=524, PETRI_PLACES=132, PETRI_TRANSITIONS=138} [2025-02-06 13:02:35,280 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, 18 predicate places. [2025-02-06 13:02:35,280 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 138 transitions, 524 flow [2025-02-06 13:02:35,280 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.75) internal successors, (287), 4 states have internal predecessors, (287), 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 13:02:35,280 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:35,280 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:35,280 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2025-02-06 13:02:35,280 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-02-06 13:02:35,281 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:35,281 INFO L85 PathProgramCache]: Analyzing trace with hash 274620724, now seen corresponding path program 2 times [2025-02-06 13:02:35,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:35,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582332242] [2025-02-06 13:02:35,281 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:02:35,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:35,290 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-02-06 13:02:35,304 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-02-06 13:02:35,305 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:02:35,305 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:35,480 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 13:02:35,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:35,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582332242] [2025-02-06 13:02:35,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582332242] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:02:35,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362387620] [2025-02-06 13:02:35,481 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:02:35,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:35,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:02:35,483 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:02:35,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-02-06 13:02:35,558 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-02-06 13:02:35,593 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-02-06 13:02:35,593 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:02:35,593 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:35,596 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-02-06 13:02:35,598 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:02:35,680 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2025-02-06 13:02:35,772 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:02:35,772 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:02:36,038 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:02:36,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362387620] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:02:36,038 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:02:36,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 18 [2025-02-06 13:02:36,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017294244] [2025-02-06 13:02:36,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:02:36,039 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-06 13:02:36,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:36,039 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-06 13:02:36,040 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2025-02-06 13:02:36,961 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2025-02-06 13:02:36,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 138 transitions, 524 flow. Second operand has 20 states, 20 states have (on average 67.3) internal successors, (1346), 20 states have internal predecessors, (1346), 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 13:02:36,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:36,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2025-02-06 13:02:36,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:38,262 INFO L124 PetriNetUnfolderBase]: 6725/14793 cut-off events. [2025-02-06 13:02:38,262 INFO L125 PetriNetUnfolderBase]: For 126/126 co-relation queries the response was YES. [2025-02-06 13:02:38,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24167 conditions, 14793 events. 6725/14793 cut-off events. For 126/126 co-relation queries the response was YES. Maximal size of possible extension queue 749. Compared 143971 event pairs, 4222 based on Foata normal form. 0/11486 useless extension candidates. Maximal degree in co-relation 8134. Up to 6055 conditions per place. [2025-02-06 13:02:38,339 INFO L140 encePairwiseOnDemand]: 112/120 looper letters, 126 selfloop transitions, 27 changer transitions 0/205 dead transitions. [2025-02-06 13:02:38,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 205 transitions, 1097 flow [2025-02-06 13:02:38,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-02-06 13:02:38,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2025-02-06 13:02:38,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1223 transitions. [2025-02-06 13:02:38,342 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5995098039215686 [2025-02-06 13:02:38,342 INFO L175 Difference]: Start difference. First operand has 132 places, 138 transitions, 524 flow. Second operand 17 states and 1223 transitions. [2025-02-06 13:02:38,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 205 transitions, 1097 flow [2025-02-06 13:02:38,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 205 transitions, 1083 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-06 13:02:38,347 INFO L231 Difference]: Finished difference. Result has 145 places, 150 transitions, 651 flow [2025-02-06 13:02:38,347 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=512, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=651, PETRI_PLACES=145, PETRI_TRANSITIONS=150} [2025-02-06 13:02:38,347 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, 31 predicate places. [2025-02-06 13:02:38,347 INFO L471 AbstractCegarLoop]: Abstraction has has 145 places, 150 transitions, 651 flow [2025-02-06 13:02:38,348 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 67.3) internal successors, (1346), 20 states have internal predecessors, (1346), 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 13:02:38,348 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:38,348 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:38,356 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-02-06 13:02:38,553 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:38,553 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-02-06 13:02:38,553 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:38,553 INFO L85 PathProgramCache]: Analyzing trace with hash -347012561, now seen corresponding path program 1 times [2025-02-06 13:02:38,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:38,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520363035] [2025-02-06 13:02:38,554 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:38,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:38,561 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-02-06 13:02:38,571 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-02-06 13:02:38,573 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:38,573 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:38,670 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:02:38,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:38,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520363035] [2025-02-06 13:02:38,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520363035] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:02:38,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653609841] [2025-02-06 13:02:38,671 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:38,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:38,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:02:38,674 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:02:38,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-02-06 13:02:38,756 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-02-06 13:02:38,786 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-02-06 13:02:38,786 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:38,786 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:38,789 INFO L256 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-06 13:02:38,790 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:02:38,855 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:02:38,856 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:02:38,918 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:02:38,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653609841] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:02:38,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:02:38,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2025-02-06 13:02:38,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263171658] [2025-02-06 13:02:38,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:02:38,919 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-06 13:02:38,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:38,919 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-06 13:02:38,920 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2025-02-06 13:02:39,080 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 120 [2025-02-06 13:02:39,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 150 transitions, 651 flow. Second operand has 14 states, 14 states have (on average 70.21428571428571) internal successors, (983), 14 states have internal predecessors, (983), 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 13:02:39,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:39,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 120 [2025-02-06 13:02:39,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:40,900 INFO L124 PetriNetUnfolderBase]: 13369/29333 cut-off events. [2025-02-06 13:02:40,900 INFO L125 PetriNetUnfolderBase]: For 258/258 co-relation queries the response was YES. [2025-02-06 13:02:40,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47876 conditions, 29333 events. 13369/29333 cut-off events. For 258/258 co-relation queries the response was YES. Maximal size of possible extension queue 1483. Compared 316741 event pairs, 8424 based on Foata normal form. 3/22874 useless extension candidates. Maximal degree in co-relation 15949. Up to 9042 conditions per place. [2025-02-06 13:02:41,073 INFO L140 encePairwiseOnDemand]: 107/120 looper letters, 119 selfloop transitions, 47 changer transitions 0/220 dead transitions. [2025-02-06 13:02:41,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 220 transitions, 1316 flow [2025-02-06 13:02:41,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-06 13:02:41,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-06 13:02:41,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 713 transitions. [2025-02-06 13:02:41,075 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6601851851851852 [2025-02-06 13:02:41,075 INFO L175 Difference]: Start difference. First operand has 145 places, 150 transitions, 651 flow. Second operand 9 states and 713 transitions. [2025-02-06 13:02:41,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 220 transitions, 1316 flow [2025-02-06 13:02:41,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 220 transitions, 1150 flow, removed 30 selfloop flow, removed 7 redundant places. [2025-02-06 13:02:41,081 INFO L231 Difference]: Finished difference. Result has 150 places, 168 transitions, 838 flow [2025-02-06 13:02:41,081 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=565, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=838, PETRI_PLACES=150, PETRI_TRANSITIONS=168} [2025-02-06 13:02:41,082 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, 36 predicate places. [2025-02-06 13:02:41,082 INFO L471 AbstractCegarLoop]: Abstraction has has 150 places, 168 transitions, 838 flow [2025-02-06 13:02:41,082 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 70.21428571428571) internal successors, (983), 14 states have internal predecessors, (983), 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 13:02:41,083 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:41,083 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:41,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-02-06 13:02:41,283 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-02-06 13:02:41,283 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-02-06 13:02:41,284 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:41,284 INFO L85 PathProgramCache]: Analyzing trace with hash 2127514445, now seen corresponding path program 1 times [2025-02-06 13:02:41,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:41,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168688532] [2025-02-06 13:02:41,284 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:41,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:41,293 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-02-06 13:02:41,305 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-02-06 13:02:41,306 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:41,306 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:41,622 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-06 13:02:41,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:41,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168688532] [2025-02-06 13:02:41,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168688532] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:02:41,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191751570] [2025-02-06 13:02:41,623 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:41,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:41,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:02:41,625 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:02:41,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-02-06 13:02:41,709 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-02-06 13:02:41,747 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-02-06 13:02:41,748 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:41,748 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:41,750 INFO L256 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-02-06 13:02:41,752 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:02:41,815 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-02-06 13:02:41,830 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-06 13:02:41,831 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 13:02:41,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191751570] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:02:41,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-06 13:02:41,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2025-02-06 13:02:41,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842241052] [2025-02-06 13:02:41,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:02:41,831 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:02:41,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:41,832 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:02:41,832 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2025-02-06 13:02:41,875 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2025-02-06 13:02:41,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 168 transitions, 838 flow. Second operand has 4 states, 4 states have (on average 69.5) internal successors, (278), 4 states have internal predecessors, (278), 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 13:02:41,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:41,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2025-02-06 13:02:41,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:44,138 INFO L124 PetriNetUnfolderBase]: 13579/29975 cut-off events. [2025-02-06 13:02:44,138 INFO L125 PetriNetUnfolderBase]: For 264/264 co-relation queries the response was YES. [2025-02-06 13:02:44,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48831 conditions, 29975 events. 13579/29975 cut-off events. For 264/264 co-relation queries the response was YES. Maximal size of possible extension queue 1496. Compared 325546 event pairs, 8484 based on Foata normal form. 0/23078 useless extension candidates. Maximal degree in co-relation 16575. Up to 18179 conditions per place. [2025-02-06 13:02:44,309 INFO L140 encePairwiseOnDemand]: 115/120 looper letters, 114 selfloop transitions, 5 changer transitions 0/171 dead transitions. [2025-02-06 13:02:44,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 171 transitions, 1082 flow [2025-02-06 13:02:44,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:02:44,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:02:44,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 316 transitions. [2025-02-06 13:02:44,310 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6583333333333333 [2025-02-06 13:02:44,310 INFO L175 Difference]: Start difference. First operand has 150 places, 168 transitions, 838 flow. Second operand 4 states and 316 transitions. [2025-02-06 13:02:44,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 171 transitions, 1082 flow [2025-02-06 13:02:44,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 171 transitions, 1080 flow, removed 1 selfloop flow, removed 0 redundant places. [2025-02-06 13:02:44,314 INFO L231 Difference]: Finished difference. Result has 154 places, 170 transitions, 860 flow [2025-02-06 13:02:44,314 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=836, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=860, PETRI_PLACES=154, PETRI_TRANSITIONS=170} [2025-02-06 13:02:44,315 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, 40 predicate places. [2025-02-06 13:02:44,315 INFO L471 AbstractCegarLoop]: Abstraction has has 154 places, 170 transitions, 860 flow [2025-02-06 13:02:44,315 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.5) internal successors, (278), 4 states have internal predecessors, (278), 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 13:02:44,315 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:44,315 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:44,321 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-02-06 13:02:44,515 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:44,516 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-02-06 13:02:44,516 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:44,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1564224270, now seen corresponding path program 2 times [2025-02-06 13:02:44,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:44,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636038057] [2025-02-06 13:02:44,516 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:02:44,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:44,524 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-02-06 13:02:44,536 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-02-06 13:02:44,536 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:02:44,536 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:44,739 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-06 13:02:44,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:44,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636038057] [2025-02-06 13:02:44,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636038057] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:02:44,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232051228] [2025-02-06 13:02:44,740 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:02:44,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:44,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:02:44,743 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:02:44,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-02-06 13:02:44,833 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-02-06 13:02:44,978 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-02-06 13:02:44,978 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:02:44,978 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:44,980 INFO L256 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-02-06 13:02:44,982 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:02:44,989 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2025-02-06 13:02:45,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2025-02-06 13:02:45,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 13:02:45,067 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 36 [2025-02-06 13:02:45,150 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-06 13:02:45,150 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:02:45,332 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-06 13:02:45,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232051228] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:02:45,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:02:45,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 18 [2025-02-06 13:02:45,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991201180] [2025-02-06 13:02:45,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:02:45,334 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-02-06 13:02:45,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:45,336 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-02-06 13:02:45,336 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2025-02-06 13:02:46,791 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 120 [2025-02-06 13:02:46,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 170 transitions, 860 flow. Second operand has 19 states, 19 states have (on average 64.6842105263158) internal successors, (1229), 19 states have internal predecessors, (1229), 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 13:02:46,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:46,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 120 [2025-02-06 13:02:46,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:50,732 INFO L124 PetriNetUnfolderBase]: 19966/43725 cut-off events. [2025-02-06 13:02:50,732 INFO L125 PetriNetUnfolderBase]: For 422/422 co-relation queries the response was YES. [2025-02-06 13:02:50,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71581 conditions, 43725 events. 19966/43725 cut-off events. For 422/422 co-relation queries the response was YES. Maximal size of possible extension queue 2152. Compared 495368 event pairs, 12606 based on Foata normal form. 0/34239 useless extension candidates. Maximal degree in co-relation 24272. Up to 9045 conditions per place. [2025-02-06 13:02:51,035 INFO L140 encePairwiseOnDemand]: 109/120 looper letters, 191 selfloop transitions, 69 changer transitions 0/312 dead transitions. [2025-02-06 13:02:51,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 312 transitions, 1955 flow [2025-02-06 13:02:51,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-02-06 13:02:51,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2025-02-06 13:02:51,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1464 transitions. [2025-02-06 13:02:51,038 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.580952380952381 [2025-02-06 13:02:51,038 INFO L175 Difference]: Start difference. First operand has 154 places, 170 transitions, 860 flow. Second operand 21 states and 1464 transitions. [2025-02-06 13:02:51,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 312 transitions, 1955 flow [2025-02-06 13:02:51,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 312 transitions, 1942 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:02:51,046 INFO L231 Difference]: Finished difference. Result has 179 places, 209 transitions, 1381 flow [2025-02-06 13:02:51,046 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=854, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1381, PETRI_PLACES=179, PETRI_TRANSITIONS=209} [2025-02-06 13:02:51,046 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, 65 predicate places. [2025-02-06 13:02:51,046 INFO L471 AbstractCegarLoop]: Abstraction has has 179 places, 209 transitions, 1381 flow [2025-02-06 13:02:51,047 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 64.6842105263158) internal successors, (1229), 19 states have internal predecessors, (1229), 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 13:02:51,047 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:51,047 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:51,055 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-02-06 13:02:51,247 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-02-06 13:02:51,248 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-02-06 13:02:51,248 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:51,248 INFO L85 PathProgramCache]: Analyzing trace with hash 136986471, now seen corresponding path program 1 times [2025-02-06 13:02:51,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:51,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276559568] [2025-02-06 13:02:51,248 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:51,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:51,257 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-02-06 13:02:51,272 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-02-06 13:02:51,272 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:51,272 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:51,375 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 13:02:51,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:51,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276559568] [2025-02-06 13:02:51,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276559568] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:02:51,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188691670] [2025-02-06 13:02:51,376 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:51,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:51,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:02:51,379 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:02:51,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-02-06 13:02:51,463 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-02-06 13:02:51,494 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-02-06 13:02:51,495 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:51,495 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:51,498 INFO L256 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-06 13:02:51,500 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:02:51,564 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 13:02:51,564 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:02:51,625 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 13:02:51,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188691670] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:02:51,625 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:02:51,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2025-02-06 13:02:51,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993579495] [2025-02-06 13:02:51,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:02:51,625 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-06 13:02:51,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:51,629 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-06 13:02:51,630 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2025-02-06 13:02:51,774 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 120 [2025-02-06 13:02:51,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 209 transitions, 1381 flow. Second operand has 14 states, 14 states have (on average 70.42857142857143) internal successors, (986), 14 states have internal predecessors, (986), 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 13:02:51,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:51,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 120 [2025-02-06 13:02:51,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:59,007 INFO L124 PetriNetUnfolderBase]: 40096/87930 cut-off events. [2025-02-06 13:02:59,007 INFO L125 PetriNetUnfolderBase]: For 1026/1026 co-relation queries the response was YES. [2025-02-06 13:02:59,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143609 conditions, 87930 events. 40096/87930 cut-off events. For 1026/1026 co-relation queries the response was YES. Maximal size of possible extension queue 4153. Compared 1089435 event pairs, 25272 based on Foata normal form. 9/68571 useless extension candidates. Maximal degree in co-relation 143497. Up to 27126 conditions per place. [2025-02-06 13:02:59,653 INFO L140 encePairwiseOnDemand]: 107/120 looper letters, 162 selfloop transitions, 65 changer transitions 0/281 dead transitions. [2025-02-06 13:02:59,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 281 transitions, 2202 flow [2025-02-06 13:02:59,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-06 13:02:59,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-06 13:02:59,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 642 transitions. [2025-02-06 13:02:59,656 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.66875 [2025-02-06 13:02:59,656 INFO L175 Difference]: Start difference. First operand has 179 places, 209 transitions, 1381 flow. Second operand 8 states and 642 transitions. [2025-02-06 13:02:59,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 281 transitions, 2202 flow [2025-02-06 13:02:59,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 281 transitions, 2012 flow, removed 36 selfloop flow, removed 10 redundant places. [2025-02-06 13:02:59,668 INFO L231 Difference]: Finished difference. Result has 179 places, 217 transitions, 1491 flow [2025-02-06 13:02:59,669 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=1264, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1491, PETRI_PLACES=179, PETRI_TRANSITIONS=217} [2025-02-06 13:02:59,669 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, 65 predicate places. [2025-02-06 13:02:59,669 INFO L471 AbstractCegarLoop]: Abstraction has has 179 places, 217 transitions, 1491 flow [2025-02-06 13:02:59,670 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 70.42857142857143) internal successors, (986), 14 states have internal predecessors, (986), 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 13:02:59,670 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:59,670 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:59,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-02-06 13:02:59,875 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:59,875 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-02-06 13:02:59,875 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:59,875 INFO L85 PathProgramCache]: Analyzing trace with hash 137130916, now seen corresponding path program 1 times [2025-02-06 13:02:59,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:59,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941841313] [2025-02-06 13:02:59,876 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:59,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:59,887 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-02-06 13:02:59,895 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-02-06 13:02:59,895 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:59,895 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:59,949 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-02-06 13:02:59,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:59,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941841313] [2025-02-06 13:02:59,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941841313] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:02:59,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:02:59,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 13:02:59,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292442683] [2025-02-06 13:02:59,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:02:59,950 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:02:59,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:59,950 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:02:59,950 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:02:59,974 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 120 [2025-02-06 13:02:59,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 217 transitions, 1491 flow. Second operand has 4 states, 4 states have (on average 72.5) internal successors, (290), 4 states have internal predecessors, (290), 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 13:02:59,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:59,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 120 [2025-02-06 13:02:59,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:03:07,521 INFO L124 PetriNetUnfolderBase]: 40690/89784 cut-off events. [2025-02-06 13:03:07,521 INFO L125 PetriNetUnfolderBase]: For 985/985 co-relation queries the response was YES. [2025-02-06 13:03:07,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146214 conditions, 89784 events. 40690/89784 cut-off events. For 985/985 co-relation queries the response was YES. Maximal size of possible extension queue 4175. Compared 1119479 event pairs, 25452 based on Foata normal form. 18/69174 useless extension candidates. Maximal degree in co-relation 146113. Up to 54369 conditions per place. [2025-02-06 13:03:08,246 INFO L140 encePairwiseOnDemand]: 116/120 looper letters, 149 selfloop transitions, 13 changer transitions 0/216 dead transitions. [2025-02-06 13:03:08,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 216 transitions, 1805 flow [2025-02-06 13:03:08,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:03:08,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:03:08,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 325 transitions. [2025-02-06 13:03:08,247 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6770833333333334 [2025-02-06 13:03:08,247 INFO L175 Difference]: Start difference. First operand has 179 places, 217 transitions, 1491 flow. Second operand 4 states and 325 transitions. [2025-02-06 13:03:08,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 216 transitions, 1805 flow [2025-02-06 13:03:08,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 216 transitions, 1728 flow, removed 1 selfloop flow, removed 2 redundant places. [2025-02-06 13:03:08,259 INFO L231 Difference]: Finished difference. Result has 180 places, 215 transitions, 1426 flow [2025-02-06 13:03:08,259 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=1400, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1426, PETRI_PLACES=180, PETRI_TRANSITIONS=215} [2025-02-06 13:03:08,259 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, 66 predicate places. [2025-02-06 13:03:08,259 INFO L471 AbstractCegarLoop]: Abstraction has has 180 places, 215 transitions, 1426 flow [2025-02-06 13:03:08,260 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.5) internal successors, (290), 4 states have internal predecessors, (290), 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 13:03:08,260 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:03:08,260 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:03:08,260 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2025-02-06 13:03:08,260 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-02-06 13:03:08,261 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:03:08,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1499805378, now seen corresponding path program 1 times [2025-02-06 13:03:08,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:03:08,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986345336] [2025-02-06 13:03:08,261 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:03:08,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:03:08,272 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-02-06 13:03:08,301 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-02-06 13:03:08,301 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:03:08,301 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:03:09,054 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 13:03:09,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:03:09,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986345336] [2025-02-06 13:03:09,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986345336] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:03:09,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739846557] [2025-02-06 13:03:09,055 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:03:09,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:03:09,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:03:09,057 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:03:09,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-02-06 13:03:09,158 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-02-06 13:03:09,196 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-02-06 13:03:09,196 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:03:09,196 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:03:09,197 INFO L256 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 45 conjuncts are in the unsatisfiable core [2025-02-06 13:03:09,200 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:03:09,207 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-02-06 13:03:09,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 13:03:09,269 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 13:03:09,294 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2025-02-06 13:03:09,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2025-02-06 13:03:09,408 INFO L349 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2025-02-06 13:03:09,409 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2025-02-06 13:03:09,431 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 13:03:09,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 13:03:09,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 13:03:09,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2025-02-06 13:03:09,633 INFO L349 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2025-02-06 13:03:09,633 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 45 [2025-02-06 13:03:09,976 INFO L349 Elim1Store]: treesize reduction 80, result has 31.6 percent of original size [2025-02-06 13:03:09,976 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 34 treesize of output 52 [2025-02-06 13:03:09,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2025-02-06 13:03:10,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 13:03:10,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 13:03:10,128 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2025-02-06 13:03:10,152 INFO L349 Elim1Store]: treesize reduction 16, result has 51.5 percent of original size [2025-02-06 13:03:10,152 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 32 [2025-02-06 13:03:10,235 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 13:03:10,236 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:03:11,012 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4738 treesize of output 4704 [2025-02-06 13:03:11,674 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 13:03:11,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739846557] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:03:11,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:03:11,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2025-02-06 13:03:11,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127509666] [2025-02-06 13:03:11,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:03:11,675 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-02-06 13:03:11,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:03:11,676 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-02-06 13:03:11,676 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2025-02-06 13:03:14,649 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 120 [2025-02-06 13:03:14,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 215 transitions, 1426 flow. Second operand has 23 states, 23 states have (on average 57.73913043478261) internal successors, (1328), 23 states have internal predecessors, (1328), 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 13:03:14,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:03:14,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 120 [2025-02-06 13:03:14,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand