./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 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/popl20-bad-buffer-mult-alt2.wvr.c -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a79fe9fcfc95192d454ac05616e4d9a71dbf2bcc8b4fd9d21dcef47910a50542 --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-06 13:05:37,129 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-06 13:05:37,192 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-02-06 13:05:37,195 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-06 13:05:37,196 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-06 13:05:37,213 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-06 13:05:37,217 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-06 13:05:37,217 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-06 13:05:37,218 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-06 13:05:37,218 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-06 13:05:37,218 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-06 13:05:37,218 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-06 13:05:37,218 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-06 13:05:37,218 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-06 13:05:37,218 INFO L153 SettingsManager]: * Use SBE=true [2025-02-06 13:05:37,219 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-06 13:05:37,219 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-06 13:05:37,219 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-06 13:05:37,219 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-06 13:05:37,219 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-06 13:05:37,220 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-02-06 13:05:37,220 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-02-06 13:05:37,220 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-02-06 13:05:37,220 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-06 13:05:37,220 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-02-06 13:05:37,220 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-06 13:05:37,220 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-06 13:05:37,220 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-06 13:05:37,220 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-06 13:05:37,220 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-06 13:05:37,220 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-06 13:05:37,221 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-06 13:05:37,221 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-06 13:05:37,221 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 13:05:37,221 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-06 13:05:37,221 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-06 13:05:37,221 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-06 13:05:37,221 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-06 13:05:37,221 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-06 13:05:37,221 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-06 13:05:37,221 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-06 13:05:37,221 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-06 13:05:37,221 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a79fe9fcfc95192d454ac05616e4d9a71dbf2bcc8b4fd9d21dcef47910a50542 [2025-02-06 13:05:37,547 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-06 13:05:37,554 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-06 13:05:37,555 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-06 13:05:37,556 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-06 13:05:37,556 INFO L274 PluginConnector]: CDTParser initialized [2025-02-06 13:05:37,558 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c [2025-02-06 13:05:38,748 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/676044819/cb02d92b762e4a75bcb9de36b385a418/FLAGf98bf54ac [2025-02-06 13:05:39,001 INFO L384 CDTParser]: Found 1 translation units. [2025-02-06 13:05:39,001 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c [2025-02-06 13:05:39,013 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/676044819/cb02d92b762e4a75bcb9de36b385a418/FLAGf98bf54ac [2025-02-06 13:05:39,302 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/676044819/cb02d92b762e4a75bcb9de36b385a418 [2025-02-06 13:05:39,306 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-06 13:05:39,307 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-06 13:05:39,310 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-06 13:05:39,310 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-06 13:05:39,313 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-06 13:05:39,315 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 01:05:39" (1/1) ... [2025-02-06 13:05:39,316 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16a24f18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:05:39, skipping insertion in model container [2025-02-06 13:05:39,317 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 01:05:39" (1/1) ... [2025-02-06 13:05:39,330 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-06 13:05:39,480 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 13:05:39,485 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 13:05:39,498 INFO L200 MainTranslator]: Completed pre-run [2025-02-06 13:05:39,531 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 13:05:39,546 INFO L204 MainTranslator]: Completed translation [2025-02-06 13:05:39,546 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:05:39 WrapperNode [2025-02-06 13:05:39,547 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-06 13:05:39,547 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-06 13:05:39,547 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-06 13:05:39,548 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-06 13:05:39,556 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:05:39" (1/1) ... [2025-02-06 13:05:39,565 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:05:39" (1/1) ... [2025-02-06 13:05:39,583 INFO L138 Inliner]: procedures = 25, calls = 56, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 291 [2025-02-06 13:05:39,584 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-06 13:05:39,585 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-06 13:05:39,585 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-06 13:05:39,585 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-06 13:05:39,591 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:05:39" (1/1) ... [2025-02-06 13:05:39,591 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:05:39" (1/1) ... [2025-02-06 13:05:39,594 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:05:39" (1/1) ... [2025-02-06 13:05:39,606 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2025-02-06 13:05:39,607 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:05:39" (1/1) ... [2025-02-06 13:05:39,607 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:05:39" (1/1) ... [2025-02-06 13:05:39,614 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:05:39" (1/1) ... [2025-02-06 13:05:39,615 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:05:39" (1/1) ... [2025-02-06 13:05:39,621 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:05:39" (1/1) ... [2025-02-06 13:05:39,622 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:05:39" (1/1) ... [2025-02-06 13:05:39,625 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-06 13:05:39,626 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-06 13:05:39,626 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-06 13:05:39,626 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-06 13:05:39,627 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:05:39" (1/1) ... [2025-02-06 13:05:39,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 13:05:39,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:05:39,662 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 13:05:39,664 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 13:05:39,682 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-06 13:05:39,682 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-02-06 13:05:39,682 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-02-06 13:05:39,683 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-02-06 13:05:39,683 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-02-06 13:05:39,683 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-02-06 13:05:39,683 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-02-06 13:05:39,683 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2025-02-06 13:05:39,683 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2025-02-06 13:05:39,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-06 13:05:39,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-06 13:05:39,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-06 13:05:39,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-06 13:05:39,683 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-02-06 13:05:39,683 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-02-06 13:05:39,683 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-06 13:05:39,683 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-06 13:05:39,683 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-06 13:05:39,683 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-06 13:05:39,683 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-06 13:05:39,685 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 13:05:39,787 INFO L257 CfgBuilder]: Building ICFG [2025-02-06 13:05:39,788 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-06 13:05:40,260 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-06 13:05:40,260 INFO L308 CfgBuilder]: Performing block encoding [2025-02-06 13:05:40,549 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-06 13:05:40,550 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-06 13:05:40,550 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 01:05:40 BoogieIcfgContainer [2025-02-06 13:05:40,550 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-06 13:05:40,553 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-06 13:05:40,553 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-06 13:05:40,556 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-06 13:05:40,557 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.02 01:05:39" (1/3) ... [2025-02-06 13:05:40,557 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2682b1f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 01:05:40, skipping insertion in model container [2025-02-06 13:05:40,557 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:05:39" (2/3) ... [2025-02-06 13:05:40,558 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2682b1f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 01:05:40, skipping insertion in model container [2025-02-06 13:05:40,558 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 01:05:40" (3/3) ... [2025-02-06 13:05:40,559 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-bad-buffer-mult-alt2.wvr.c [2025-02-06 13:05:40,570 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-06 13:05:40,571 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-bad-buffer-mult-alt2.wvr.c that has 5 procedures, 59 locations, 1 initial locations, 6 loop locations, and 14 error locations. [2025-02-06 13:05:40,572 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-06 13:05:40,632 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2025-02-06 13:05:40,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 71 places, 64 transitions, 156 flow [2025-02-06 13:05:40,684 INFO L124 PetriNetUnfolderBase]: 6/60 cut-off events. [2025-02-06 13:05:40,689 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-02-06 13:05:40,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77 conditions, 60 events. 6/60 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 129 event pairs, 0 based on Foata normal form. 0/40 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2025-02-06 13:05:40,695 INFO L82 GeneralOperation]: Start removeDead. Operand has 71 places, 64 transitions, 156 flow [2025-02-06 13:05:40,697 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 59 transitions, 142 flow [2025-02-06 13:05:40,702 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-06 13:05:40,710 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;@6aab20e3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-06 13:05:40,712 INFO L334 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2025-02-06 13:05:40,714 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-06 13:05:40,716 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-02-06 13:05:40,716 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-06 13:05:40,716 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:05:40,717 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-06 13:05:40,717 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-02-06 13:05:40,721 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:05:40,722 INFO L85 PathProgramCache]: Analyzing trace with hash 797708, now seen corresponding path program 1 times [2025-02-06 13:05:40,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:05:40,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947240154] [2025-02-06 13:05:40,728 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:05:40,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:05:40,783 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-06 13:05:40,803 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-06 13:05:40,803 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:05:40,803 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:05:40,922 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 13:05:40,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:05:40,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947240154] [2025-02-06 13:05:40,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947240154] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:05:40,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:05:40,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-02-06 13:05:40,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118524319] [2025-02-06 13:05:40,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:05:40,932 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 13:05:40,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:05:40,951 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 13:05:40,953 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 13:05:40,970 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 64 [2025-02-06 13:05:40,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 59 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:05:40,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:05:40,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 64 [2025-02-06 13:05:40,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:05:42,427 INFO L124 PetriNetUnfolderBase]: 11253/15061 cut-off events. [2025-02-06 13:05:42,427 INFO L125 PetriNetUnfolderBase]: For 374/374 co-relation queries the response was YES. [2025-02-06 13:05:42,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30470 conditions, 15061 events. 11253/15061 cut-off events. For 374/374 co-relation queries the response was YES. Maximal size of possible extension queue 828. Compared 84476 event pairs, 9160 based on Foata normal form. 1/10576 useless extension candidates. Maximal degree in co-relation 28212. Up to 14621 conditions per place. [2025-02-06 13:05:42,539 INFO L140 encePairwiseOnDemand]: 59/64 looper letters, 42 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2025-02-06 13:05:42,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 55 transitions, 222 flow [2025-02-06 13:05:42,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 13:05:42,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 13:05:42,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2025-02-06 13:05:42,553 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4947916666666667 [2025-02-06 13:05:42,554 INFO L175 Difference]: Start difference. First operand has 66 places, 59 transitions, 142 flow. Second operand 3 states and 95 transitions. [2025-02-06 13:05:42,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 55 transitions, 222 flow [2025-02-06 13:05:42,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 55 transitions, 206 flow, removed 0 selfloop flow, removed 8 redundant places. [2025-02-06 13:05:42,578 INFO L231 Difference]: Finished difference. Result has 56 places, 55 transitions, 122 flow [2025-02-06 13:05:42,581 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=56, PETRI_TRANSITIONS=55} [2025-02-06 13:05:42,583 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, -10 predicate places. [2025-02-06 13:05:42,584 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 55 transitions, 122 flow [2025-02-06 13:05:42,584 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:05:42,584 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:05:42,585 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-06 13:05:42,585 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-06 13:05:42,585 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-02-06 13:05:42,585 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:05:42,585 INFO L85 PathProgramCache]: Analyzing trace with hash 797709, now seen corresponding path program 1 times [2025-02-06 13:05:42,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:05:42,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952220452] [2025-02-06 13:05:42,586 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:05:42,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:05:42,601 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-06 13:05:42,628 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-06 13:05:42,631 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:05:42,632 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:05:42,893 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 13:05:42,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:05:42,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952220452] [2025-02-06 13:05:42,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952220452] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:05:42,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:05:42,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 13:05:42,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891632860] [2025-02-06 13:05:42,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:05:42,896 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:05:42,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:05:42,896 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:05:42,897 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:05:42,915 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 64 [2025-02-06 13:05:42,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 55 transitions, 122 flow. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:05:42,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:05:42,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 64 [2025-02-06 13:05:42,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:05:44,126 INFO L124 PetriNetUnfolderBase]: 11254/15064 cut-off events. [2025-02-06 13:05:44,127 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2025-02-06 13:05:44,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29959 conditions, 15064 events. 11254/15064 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 828. Compared 84562 event pairs, 9160 based on Foata normal form. 0/10576 useless extension candidates. Maximal degree in co-relation 29930. Up to 14630 conditions per place. [2025-02-06 13:05:44,183 INFO L140 encePairwiseOnDemand]: 59/64 looper letters, 45 selfloop transitions, 4 changer transitions 0/58 dead transitions. [2025-02-06 13:05:44,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 58 transitions, 226 flow [2025-02-06 13:05:44,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:05:44,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:05:44,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 114 transitions. [2025-02-06 13:05:44,185 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4453125 [2025-02-06 13:05:44,185 INFO L175 Difference]: Start difference. First operand has 56 places, 55 transitions, 122 flow. Second operand 4 states and 114 transitions. [2025-02-06 13:05:44,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 58 transitions, 226 flow [2025-02-06 13:05:44,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 58 transitions, 222 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:05:44,187 INFO L231 Difference]: Finished difference. Result has 59 places, 58 transitions, 145 flow [2025-02-06 13:05:44,187 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=145, PETRI_PLACES=59, PETRI_TRANSITIONS=58} [2025-02-06 13:05:44,188 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, -7 predicate places. [2025-02-06 13:05:44,188 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 58 transitions, 145 flow [2025-02-06 13:05:44,188 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:05:44,188 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:05:44,188 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2025-02-06 13:05:44,188 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-06 13:05:44,188 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-02-06 13:05:44,188 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:05:44,189 INFO L85 PathProgramCache]: Analyzing trace with hash 24729982, now seen corresponding path program 1 times [2025-02-06 13:05:44,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:05:44,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045072743] [2025-02-06 13:05:44,189 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:05:44,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:05:44,199 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-02-06 13:05:44,207 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-02-06 13:05:44,208 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:05:44,208 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:05:44,452 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 13:05:44,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:05:44,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045072743] [2025-02-06 13:05:44,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045072743] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:05:44,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:05:44,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 13:05:44,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614998261] [2025-02-06 13:05:44,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:05:44,452 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:05:44,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:05:44,453 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:05:44,453 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-06 13:05:44,475 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 64 [2025-02-06 13:05:44,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 58 transitions, 145 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:05:44,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:05:44,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 64 [2025-02-06 13:05:44,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:05:45,507 INFO L124 PetriNetUnfolderBase]: 11255/15067 cut-off events. [2025-02-06 13:05:45,507 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2025-02-06 13:05:45,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29976 conditions, 15067 events. 11255/15067 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 828. Compared 84524 event pairs, 9160 based on Foata normal form. 0/10578 useless extension candidates. Maximal degree in co-relation 29951. Up to 14629 conditions per place. [2025-02-06 13:05:45,560 INFO L140 encePairwiseOnDemand]: 56/64 looper letters, 45 selfloop transitions, 7 changer transitions 0/61 dead transitions. [2025-02-06 13:05:45,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 61 transitions, 255 flow [2025-02-06 13:05:45,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:05:45,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:05:45,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 133 transitions. [2025-02-06 13:05:45,561 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.415625 [2025-02-06 13:05:45,562 INFO L175 Difference]: Start difference. First operand has 59 places, 58 transitions, 145 flow. Second operand 5 states and 133 transitions. [2025-02-06 13:05:45,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 61 transitions, 255 flow [2025-02-06 13:05:45,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 61 transitions, 252 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 13:05:45,563 INFO L231 Difference]: Finished difference. Result has 64 places, 61 transitions, 179 flow [2025-02-06 13:05:45,563 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=179, PETRI_PLACES=64, PETRI_TRANSITIONS=61} [2025-02-06 13:05:45,564 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, -2 predicate places. [2025-02-06 13:05:45,564 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 61 transitions, 179 flow [2025-02-06 13:05:45,564 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:05:45,564 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:05:45,564 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2025-02-06 13:05:45,564 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-02-06 13:05:45,564 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-02-06 13:05:45,565 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:05:45,565 INFO L85 PathProgramCache]: Analyzing trace with hash 766623414, now seen corresponding path program 1 times [2025-02-06 13:05:45,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:05:45,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527309504] [2025-02-06 13:05:45,565 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:05:45,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:05:45,570 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-06 13:05:45,576 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-06 13:05:45,577 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:05:45,577 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:05:45,771 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 13:05:45,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:05:45,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527309504] [2025-02-06 13:05:45,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527309504] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:05:45,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868456606] [2025-02-06 13:05:45,772 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:05:45,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:05:45,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:05:45,775 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 13:05:45,776 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 13:05:45,830 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-06 13:05:45,839 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-06 13:05:45,839 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:05:45,839 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:05:45,841 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-06 13:05:45,844 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:05:45,905 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 13:05:46,006 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 13:05:46,006 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:05:46,081 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 13:05:46,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868456606] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:05:46,081 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:05:46,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2025-02-06 13:05:46,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344241560] [2025-02-06 13:05:46,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:05:46,082 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-06 13:05:46,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:05:46,082 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-06 13:05:46,083 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2025-02-06 13:05:46,123 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 64 [2025-02-06 13:05:46,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 61 transitions, 179 flow. Second operand has 11 states, 11 states have (on average 17.363636363636363) internal successors, (191), 11 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:05:46,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:05:46,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 64 [2025-02-06 13:05:46,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:05:47,375 INFO L124 PetriNetUnfolderBase]: 11256/15069 cut-off events. [2025-02-06 13:05:47,376 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2025-02-06 13:05:47,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29999 conditions, 15069 events. 11256/15069 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 828. Compared 84555 event pairs, 9160 based on Foata normal form. 0/10583 useless extension candidates. Maximal degree in co-relation 29961. Up to 14630 conditions per place. [2025-02-06 13:05:47,569 INFO L140 encePairwiseOnDemand]: 59/64 looper letters, 44 selfloop transitions, 10 changer transitions 0/63 dead transitions. [2025-02-06 13:05:47,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 63 transitions, 298 flow [2025-02-06 13:05:47,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-06 13:05:47,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-06 13:05:47,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2025-02-06 13:05:47,582 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.353515625 [2025-02-06 13:05:47,583 INFO L175 Difference]: Start difference. First operand has 64 places, 61 transitions, 179 flow. Second operand 8 states and 181 transitions. [2025-02-06 13:05:47,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 63 transitions, 298 flow [2025-02-06 13:05:47,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 63 transitions, 297 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 13:05:47,586 INFO L231 Difference]: Finished difference. Result has 69 places, 63 transitions, 209 flow [2025-02-06 13:05:47,590 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=209, PETRI_PLACES=69, PETRI_TRANSITIONS=63} [2025-02-06 13:05:47,592 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 3 predicate places. [2025-02-06 13:05:47,592 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 63 transitions, 209 flow [2025-02-06 13:05:47,592 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 17.363636363636363) internal successors, (191), 11 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:05:47,593 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:05:47,593 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2025-02-06 13:05:47,610 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 13:05:47,794 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:05:47,794 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-02-06 13:05:47,794 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:05:47,795 INFO L85 PathProgramCache]: Analyzing trace with hash -2004266480, now seen corresponding path program 1 times [2025-02-06 13:05:47,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:05:47,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118853530] [2025-02-06 13:05:47,795 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:05:47,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:05:47,801 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-06 13:05:47,810 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-06 13:05:47,811 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:05:47,812 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:05:47,980 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 13:05:47,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:05:47,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118853530] [2025-02-06 13:05:47,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118853530] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:05:47,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76484116] [2025-02-06 13:05:47,981 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:05:47,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:05:47,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:05:47,983 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:05:47,984 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 13:05:48,032 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-06 13:05:48,049 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-06 13:05:48,050 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:05:48,050 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:05:48,051 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-06 13:05:48,052 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:05:48,067 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 13:05:48,205 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 13:05:48,205 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:05:48,333 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 13:05:48,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76484116] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:05:48,334 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:05:48,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2025-02-06 13:05:48,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154022243] [2025-02-06 13:05:48,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:05:48,334 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-06 13:05:48,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:05:48,335 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-06 13:05:48,335 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2025-02-06 13:05:48,395 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 64 [2025-02-06 13:05:48,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 63 transitions, 209 flow. Second operand has 13 states, 13 states have (on average 17.307692307692307) internal successors, (225), 13 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:05:48,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:05:48,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 64 [2025-02-06 13:05:48,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:05:49,349 INFO L124 PetriNetUnfolderBase]: 11257/15071 cut-off events. [2025-02-06 13:05:49,350 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2025-02-06 13:05:49,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30015 conditions, 15071 events. 11257/15071 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 828. Compared 84629 event pairs, 9160 based on Foata normal form. 0/10585 useless extension candidates. Maximal degree in co-relation 29969. Up to 14622 conditions per place. [2025-02-06 13:05:49,405 INFO L140 encePairwiseOnDemand]: 56/64 looper letters, 38 selfloop transitions, 18 changer transitions 0/65 dead transitions. [2025-02-06 13:05:49,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 65 transitions, 329 flow [2025-02-06 13:05:49,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-06 13:05:49,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-06 13:05:49,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 202 transitions. [2025-02-06 13:05:49,407 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3506944444444444 [2025-02-06 13:05:49,407 INFO L175 Difference]: Start difference. First operand has 69 places, 63 transitions, 209 flow. Second operand 9 states and 202 transitions. [2025-02-06 13:05:49,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 65 transitions, 329 flow [2025-02-06 13:05:49,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 65 transitions, 282 flow, removed 6 selfloop flow, removed 8 redundant places. [2025-02-06 13:05:49,409 INFO L231 Difference]: Finished difference. Result has 68 places, 65 transitions, 206 flow [2025-02-06 13:05:49,409 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=206, PETRI_PLACES=68, PETRI_TRANSITIONS=65} [2025-02-06 13:05:49,410 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 2 predicate places. [2025-02-06 13:05:49,410 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 65 transitions, 206 flow [2025-02-06 13:05:49,410 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 17.307692307692307) internal successors, (225), 13 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:05:49,410 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:05:49,410 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:05:49,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-02-06 13:05:49,610 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:05:49,611 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-02-06 13:05:49,611 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:05:49,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1836981440, now seen corresponding path program 1 times [2025-02-06 13:05:49,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:05:49,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052808586] [2025-02-06 13:05:49,612 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:05:49,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:05:49,618 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-06 13:05:49,622 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-06 13:05:49,623 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:05:49,623 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:05:49,677 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 13:05:49,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:05:49,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052808586] [2025-02-06 13:05:49,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052808586] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:05:49,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:05:49,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 13:05:49,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069600738] [2025-02-06 13:05:49,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:05:49,678 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:05:49,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:05:49,679 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:05:49,679 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:05:49,682 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 64 [2025-02-06 13:05:49,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 65 transitions, 206 flow. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:05:49,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:05:49,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 64 [2025-02-06 13:05:49,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:05:50,565 INFO L124 PetriNetUnfolderBase]: 13736/18598 cut-off events. [2025-02-06 13:05:50,565 INFO L125 PetriNetUnfolderBase]: For 58/58 co-relation queries the response was YES. [2025-02-06 13:05:50,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37047 conditions, 18598 events. 13736/18598 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 980. Compared 108890 event pairs, 11357 based on Foata normal form. 541/14055 useless extension candidates. Maximal degree in co-relation 29954. Up to 14636 conditions per place. [2025-02-06 13:05:50,651 INFO L140 encePairwiseOnDemand]: 53/64 looper letters, 89 selfloop transitions, 5 changer transitions 0/103 dead transitions. [2025-02-06 13:05:50,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 103 transitions, 516 flow [2025-02-06 13:05:50,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:05:50,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:05:50,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 178 transitions. [2025-02-06 13:05:50,652 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.55625 [2025-02-06 13:05:50,652 INFO L175 Difference]: Start difference. First operand has 68 places, 65 transitions, 206 flow. Second operand 5 states and 178 transitions. [2025-02-06 13:05:50,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 103 transitions, 516 flow [2025-02-06 13:05:50,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 103 transitions, 463 flow, removed 12 selfloop flow, removed 5 redundant places. [2025-02-06 13:05:50,654 INFO L231 Difference]: Finished difference. Result has 69 places, 67 transitions, 212 flow [2025-02-06 13:05:50,654 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=212, PETRI_PLACES=69, PETRI_TRANSITIONS=67} [2025-02-06 13:05:50,655 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 3 predicate places. [2025-02-06 13:05:50,655 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 67 transitions, 212 flow [2025-02-06 13:05:50,655 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:05:50,655 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:05:50,655 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:05:50,655 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-02-06 13:05:50,655 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-02-06 13:05:50,655 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:05:50,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1743426103, now seen corresponding path program 1 times [2025-02-06 13:05:50,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:05:50,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724636220] [2025-02-06 13:05:50,656 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:05:50,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:05:50,662 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-06 13:05:50,668 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-06 13:05:50,668 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:05:50,668 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:05:50,734 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 13:05:50,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:05:50,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724636220] [2025-02-06 13:05:50,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724636220] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:05:50,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:05:50,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 13:05:50,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196456287] [2025-02-06 13:05:50,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:05:50,735 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:05:50,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:05:50,735 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:05:50,735 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:05:50,746 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 64 [2025-02-06 13:05:50,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 67 transitions, 212 flow. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:05:50,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:05:50,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 64 [2025-02-06 13:05:50,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:05:51,397 INFO L124 PetriNetUnfolderBase]: 10422/14172 cut-off events. [2025-02-06 13:05:51,398 INFO L125 PetriNetUnfolderBase]: For 936/936 co-relation queries the response was YES. [2025-02-06 13:05:51,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30029 conditions, 14172 events. 10422/14172 cut-off events. For 936/936 co-relation queries the response was YES. Maximal size of possible extension queue 738. Compared 80747 event pairs, 8512 based on Foata normal form. 0/10957 useless extension candidates. Maximal degree in co-relation 22976. Up to 13740 conditions per place. [2025-02-06 13:05:51,462 INFO L140 encePairwiseOnDemand]: 59/64 looper letters, 48 selfloop transitions, 8 changer transitions 0/65 dead transitions. [2025-02-06 13:05:51,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 65 transitions, 316 flow [2025-02-06 13:05:51,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:05:51,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:05:51,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2025-02-06 13:05:51,463 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3875 [2025-02-06 13:05:51,463 INFO L175 Difference]: Start difference. First operand has 69 places, 67 transitions, 212 flow. Second operand 5 states and 124 transitions. [2025-02-06 13:05:51,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 65 transitions, 316 flow [2025-02-06 13:05:51,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 65 transitions, 311 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:05:51,467 INFO L231 Difference]: Finished difference. Result has 69 places, 65 transitions, 215 flow [2025-02-06 13:05:51,467 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=215, PETRI_PLACES=69, PETRI_TRANSITIONS=65} [2025-02-06 13:05:51,467 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 3 predicate places. [2025-02-06 13:05:51,467 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 65 transitions, 215 flow [2025-02-06 13:05:51,467 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:05:51,467 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:05:51,468 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:05:51,468 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-02-06 13:05:51,468 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-02-06 13:05:51,468 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:05:51,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1743426104, now seen corresponding path program 1 times [2025-02-06 13:05:51,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:05:51,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141758194] [2025-02-06 13:05:51,468 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:05:51,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:05:51,473 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-06 13:05:51,480 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-06 13:05:51,480 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:05:51,480 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:05:51,649 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 13:05:51,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:05:51,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141758194] [2025-02-06 13:05:51,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141758194] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:05:51,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868543842] [2025-02-06 13:05:51,649 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:05:51,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:05:51,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:05:51,651 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 13:05:51,653 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 13:05:51,698 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-06 13:05:51,711 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-06 13:05:51,711 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:05:51,711 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:05:51,712 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-02-06 13:05:51,713 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:05:51,720 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 13:05:51,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 13:05:51,762 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2025-02-06 13:05:51,776 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-06 13:05:51,776 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-02-06 13:05:51,800 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:05:51,800 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 13:05:51,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868543842] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:05:51,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-06 13:05:51,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 6 [2025-02-06 13:05:51,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944990342] [2025-02-06 13:05:51,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:05:51,800 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:05:51,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:05:51,801 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:05:51,801 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2025-02-06 13:05:51,811 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 64 [2025-02-06 13:05:51,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 65 transitions, 215 flow. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:05:51,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:05:51,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 64 [2025-02-06 13:05:51,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:05:52,266 INFO L124 PetriNetUnfolderBase]: 7684/10514 cut-off events. [2025-02-06 13:05:52,267 INFO L125 PetriNetUnfolderBase]: For 767/767 co-relation queries the response was YES. [2025-02-06 13:05:52,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21704 conditions, 10514 events. 7684/10514 cut-off events. For 767/767 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 58058 event pairs, 6191 based on Foata normal form. 0/8767 useless extension candidates. Maximal degree in co-relation 14596. Up to 10205 conditions per place. [2025-02-06 13:05:52,322 INFO L140 encePairwiseOnDemand]: 60/64 looper letters, 50 selfloop transitions, 4 changer transitions 0/63 dead transitions. [2025-02-06 13:05:52,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 63 transitions, 315 flow [2025-02-06 13:05:52,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:05:52,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:05:52,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 106 transitions. [2025-02-06 13:05:52,323 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4140625 [2025-02-06 13:05:52,323 INFO L175 Difference]: Start difference. First operand has 69 places, 65 transitions, 215 flow. Second operand 4 states and 106 transitions. [2025-02-06 13:05:52,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 63 transitions, 315 flow [2025-02-06 13:05:52,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 63 transitions, 303 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-06 13:05:52,326 INFO L231 Difference]: Finished difference. Result has 67 places, 63 transitions, 203 flow [2025-02-06 13:05:52,326 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=203, PETRI_PLACES=67, PETRI_TRANSITIONS=63} [2025-02-06 13:05:52,327 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 1 predicate places. [2025-02-06 13:05:52,327 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 63 transitions, 203 flow [2025-02-06 13:05:52,327 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:05:52,327 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:05:52,327 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:05:52,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-02-06 13:05:52,532 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 13:05:52,532 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-02-06 13:05:52,533 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:05:52,533 INFO L85 PathProgramCache]: Analyzing trace with hash -621797451, now seen corresponding path program 1 times [2025-02-06 13:05:52,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:05:52,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509483979] [2025-02-06 13:05:52,533 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:05:52,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:05:52,539 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-06 13:05:52,544 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-06 13:05:52,544 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:05:52,544 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:05:52,614 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 13:05:52,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:05:52,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509483979] [2025-02-06 13:05:52,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509483979] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:05:52,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:05:52,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 13:05:52,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700149596] [2025-02-06 13:05:52,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:05:52,615 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:05:52,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:05:52,616 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:05:52,616 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:05:52,621 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 64 [2025-02-06 13:05:52,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 63 transitions, 203 flow. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:05:52,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:05:52,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 64 [2025-02-06 13:05:52,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:05:53,226 INFO L124 PetriNetUnfolderBase]: 9465/13199 cut-off events. [2025-02-06 13:05:53,226 INFO L125 PetriNetUnfolderBase]: For 998/998 co-relation queries the response was YES. [2025-02-06 13:05:53,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27239 conditions, 13199 events. 9465/13199 cut-off events. For 998/998 co-relation queries the response was YES. Maximal size of possible extension queue 637. Compared 76847 event pairs, 7762 based on Foata normal form. 333/11971 useless extension candidates. Maximal degree in co-relation 18394. Up to 10206 conditions per place. [2025-02-06 13:05:53,278 INFO L140 encePairwiseOnDemand]: 55/64 looper letters, 72 selfloop transitions, 7 changer transitions 0/88 dead transitions. [2025-02-06 13:05:53,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 88 transitions, 423 flow [2025-02-06 13:05:53,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:05:53,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:05:53,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 146 transitions. [2025-02-06 13:05:53,279 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5703125 [2025-02-06 13:05:53,279 INFO L175 Difference]: Start difference. First operand has 67 places, 63 transitions, 203 flow. Second operand 4 states and 146 transitions. [2025-02-06 13:05:53,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 88 transitions, 423 flow [2025-02-06 13:05:53,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 88 transitions, 418 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:05:53,282 INFO L231 Difference]: Finished difference. Result has 69 places, 63 transitions, 226 flow [2025-02-06 13:05:53,282 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=226, PETRI_PLACES=69, PETRI_TRANSITIONS=63} [2025-02-06 13:05:53,287 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 3 predicate places. [2025-02-06 13:05:53,287 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 63 transitions, 226 flow [2025-02-06 13:05:53,287 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:05:53,287 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:05:53,288 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:05:53,288 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-02-06 13:05:53,288 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-02-06 13:05:53,288 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:05:53,291 INFO L85 PathProgramCache]: Analyzing trace with hash -814488889, now seen corresponding path program 1 times [2025-02-06 13:05:53,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:05:53,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940573714] [2025-02-06 13:05:53,291 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:05:53,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:05:53,296 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-06 13:05:53,307 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-06 13:05:53,314 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:05:53,314 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:05:53,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:05:53,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:05:53,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940573714] [2025-02-06 13:05:53,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940573714] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:05:53,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606687218] [2025-02-06 13:05:53,479 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:05:53,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:05:53,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:05:53,484 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 13:05:53,485 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 13:05:53,531 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-06 13:05:53,546 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-06 13:05:53,546 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:05:53,546 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:05:53,547 INFO L256 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-02-06 13:05:53,548 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:05:53,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:05:53,602 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 13:05:53,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606687218] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:05:53,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-06 13:05:53,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2025-02-06 13:05:53,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454542203] [2025-02-06 13:05:53,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:05:53,603 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:05:53,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:05:53,603 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:05:53,603 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-02-06 13:05:53,614 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 64 [2025-02-06 13:05:53,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 63 transitions, 226 flow. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:05:53,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:05:53,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 64 [2025-02-06 13:05:53,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:05:54,080 INFO L124 PetriNetUnfolderBase]: 7273/10257 cut-off events. [2025-02-06 13:05:54,080 INFO L125 PetriNetUnfolderBase]: For 1400/1400 co-relation queries the response was YES. [2025-02-06 13:05:54,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22460 conditions, 10257 events. 7273/10257 cut-off events. For 1400/1400 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 58798 event pairs, 5890 based on Foata normal form. 0/9370 useless extension candidates. Maximal degree in co-relation 15096. Up to 9831 conditions per place. [2025-02-06 13:05:54,124 INFO L140 encePairwiseOnDemand]: 60/64 looper letters, 45 selfloop transitions, 7 changer transitions 0/61 dead transitions. [2025-02-06 13:05:54,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 61 transitions, 322 flow [2025-02-06 13:05:54,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:05:54,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:05:54,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 112 transitions. [2025-02-06 13:05:54,126 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4375 [2025-02-06 13:05:54,126 INFO L175 Difference]: Start difference. First operand has 69 places, 63 transitions, 226 flow. Second operand 4 states and 112 transitions. [2025-02-06 13:05:54,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 61 transitions, 322 flow [2025-02-06 13:05:54,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 61 transitions, 317 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 13:05:54,131 INFO L231 Difference]: Finished difference. Result has 69 places, 61 transitions, 227 flow [2025-02-06 13:05:54,131 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=227, PETRI_PLACES=69, PETRI_TRANSITIONS=61} [2025-02-06 13:05:54,132 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 3 predicate places. [2025-02-06 13:05:54,133 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 61 transitions, 227 flow [2025-02-06 13:05:54,133 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:05:54,133 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:05:54,133 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:05:54,139 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 13:05:54,334 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-02-06 13:05:54,334 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-02-06 13:05:54,335 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:05:54,335 INFO L85 PathProgramCache]: Analyzing trace with hash -814488890, now seen corresponding path program 1 times [2025-02-06 13:05:54,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:05:54,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266686650] [2025-02-06 13:05:54,335 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:05:54,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:05:54,344 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-06 13:05:54,355 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-06 13:05:54,355 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:05:54,355 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:05:54,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:05:54,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:05:54,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266686650] [2025-02-06 13:05:54,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266686650] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:05:54,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:05:54,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 13:05:54,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633255761] [2025-02-06 13:05:54,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:05:54,414 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:05:54,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:05:54,419 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:05:54,419 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:05:54,426 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 64 [2025-02-06 13:05:54,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 61 transitions, 227 flow. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:05:54,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:05:54,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 64 [2025-02-06 13:05:54,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:05:54,784 INFO L124 PetriNetUnfolderBase]: 5447/7795 cut-off events. [2025-02-06 13:05:54,784 INFO L125 PetriNetUnfolderBase]: For 1126/1126 co-relation queries the response was YES. [2025-02-06 13:05:54,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16632 conditions, 7795 events. 5447/7795 cut-off events. For 1126/1126 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 43729 event pairs, 4350 based on Foata normal form. 0/7591 useless extension candidates. Maximal degree in co-relation 11185. Up to 7419 conditions per place. [2025-02-06 13:05:54,828 INFO L140 encePairwiseOnDemand]: 60/64 looper letters, 45 selfloop transitions, 5 changer transitions 0/59 dead transitions. [2025-02-06 13:05:54,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 59 transitions, 319 flow [2025-02-06 13:05:54,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:05:54,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:05:54,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2025-02-06 13:05:54,831 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3984375 [2025-02-06 13:05:54,831 INFO L175 Difference]: Start difference. First operand has 69 places, 61 transitions, 227 flow. Second operand 4 states and 102 transitions. [2025-02-06 13:05:54,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 59 transitions, 319 flow [2025-02-06 13:05:54,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 59 transitions, 309 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:05:54,834 INFO L231 Difference]: Finished difference. Result has 68 places, 59 transitions, 219 flow [2025-02-06 13:05:54,834 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=219, PETRI_PLACES=68, PETRI_TRANSITIONS=59} [2025-02-06 13:05:54,835 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 2 predicate places. [2025-02-06 13:05:54,836 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 59 transitions, 219 flow [2025-02-06 13:05:54,836 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:05:54,836 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:05:54,836 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:05:54,837 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2025-02-06 13:05:54,837 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-02-06 13:05:54,838 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:05:54,838 INFO L85 PathProgramCache]: Analyzing trace with hash 100253503, now seen corresponding path program 1 times [2025-02-06 13:05:54,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:05:54,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264225504] [2025-02-06 13:05:54,838 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:05:54,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:05:54,844 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-02-06 13:05:54,852 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-02-06 13:05:54,852 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:05:54,852 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:05:54,965 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 13:05:54,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:05:54,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264225504] [2025-02-06 13:05:54,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264225504] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:05:54,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:05:54,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 13:05:54,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648877561] [2025-02-06 13:05:54,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:05:54,966 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:05:54,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:05:54,967 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:05:54,967 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2025-02-06 13:05:54,969 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 64 [2025-02-06 13:05:54,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 59 transitions, 219 flow. Second operand has 5 states, 5 states have (on average 22.8) internal successors, (114), 5 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:05:54,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:05:54,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 64 [2025-02-06 13:05:54,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:05:55,543 INFO L124 PetriNetUnfolderBase]: 5494/8307 cut-off events. [2025-02-06 13:05:55,543 INFO L125 PetriNetUnfolderBase]: For 1363/1363 co-relation queries the response was YES. [2025-02-06 13:05:55,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17487 conditions, 8307 events. 5494/8307 cut-off events. For 1363/1363 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 50176 event pairs, 743 based on Foata normal form. 484/8734 useless extension candidates. Maximal degree in co-relation 14251. Up to 4096 conditions per place. [2025-02-06 13:05:55,575 INFO L140 encePairwiseOnDemand]: 59/64 looper letters, 80 selfloop transitions, 6 changer transitions 3/98 dead transitions. [2025-02-06 13:05:55,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 98 transitions, 495 flow [2025-02-06 13:05:55,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:05:55,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:05:55,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 166 transitions. [2025-02-06 13:05:55,577 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.51875 [2025-02-06 13:05:55,577 INFO L175 Difference]: Start difference. First operand has 68 places, 59 transitions, 219 flow. Second operand 5 states and 166 transitions. [2025-02-06 13:05:55,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 98 transitions, 495 flow [2025-02-06 13:05:55,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 98 transitions, 489 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:05:55,579 INFO L231 Difference]: Finished difference. Result has 71 places, 57 transitions, 206 flow [2025-02-06 13:05:55,580 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=206, PETRI_PLACES=71, PETRI_TRANSITIONS=57} [2025-02-06 13:05:55,580 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 5 predicate places. [2025-02-06 13:05:55,580 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 57 transitions, 206 flow [2025-02-06 13:05:55,580 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.8) internal successors, (114), 5 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:05:55,580 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:05:55,581 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:05:55,581 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2025-02-06 13:05:55,581 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-02-06 13:05:55,581 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:05:55,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1730950794, now seen corresponding path program 1 times [2025-02-06 13:05:55,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:05:55,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870019304] [2025-02-06 13:05:55,581 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:05:55,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:05:55,591 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 34 statements into 1 equivalence classes. [2025-02-06 13:05:55,609 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 34 of 34 statements. [2025-02-06 13:05:55,609 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:05:55,609 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:05:55,809 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 13:05:55,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:05:55,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870019304] [2025-02-06 13:05:55,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870019304] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:05:55,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:05:55,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 13:05:55,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487560145] [2025-02-06 13:05:55,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:05:55,810 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:05:55,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:05:55,810 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:05:55,810 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-06 13:05:55,814 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 64 [2025-02-06 13:05:55,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 57 transitions, 206 flow. Second operand has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:05:55,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:05:55,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 64 [2025-02-06 13:05:55,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:05:56,602 INFO L124 PetriNetUnfolderBase]: 6744/9681 cut-off events. [2025-02-06 13:05:56,603 INFO L125 PetriNetUnfolderBase]: For 4748/4748 co-relation queries the response was YES. [2025-02-06 13:05:56,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23077 conditions, 9681 events. 6744/9681 cut-off events. For 4748/4748 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 55158 event pairs, 698 based on Foata normal form. 352/10015 useless extension candidates. Maximal degree in co-relation 23038. Up to 5858 conditions per place. [2025-02-06 13:05:56,649 INFO L140 encePairwiseOnDemand]: 57/64 looper letters, 91 selfloop transitions, 9 changer transitions 0/109 dead transitions. [2025-02-06 13:05:56,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 109 transitions, 563 flow [2025-02-06 13:05:56,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 13:05:56,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-06 13:05:56,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 197 transitions. [2025-02-06 13:05:56,651 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5130208333333334 [2025-02-06 13:05:56,651 INFO L175 Difference]: Start difference. First operand has 71 places, 57 transitions, 206 flow. Second operand 6 states and 197 transitions. [2025-02-06 13:05:56,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 109 transitions, 563 flow [2025-02-06 13:05:56,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 109 transitions, 543 flow, removed 2 selfloop flow, removed 4 redundant places. [2025-02-06 13:05:56,655 INFO L231 Difference]: Finished difference. Result has 73 places, 62 transitions, 255 flow [2025-02-06 13:05:56,655 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=255, PETRI_PLACES=73, PETRI_TRANSITIONS=62} [2025-02-06 13:05:56,656 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 7 predicate places. [2025-02-06 13:05:56,656 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 62 transitions, 255 flow [2025-02-06 13:05:56,656 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:05:56,656 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:05:56,657 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:05:56,657 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2025-02-06 13:05:56,657 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-02-06 13:05:56,657 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:05:56,657 INFO L85 PathProgramCache]: Analyzing trace with hash 551070838, now seen corresponding path program 2 times [2025-02-06 13:05:56,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:05:56,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258885014] [2025-02-06 13:05:56,660 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:05:56,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:05:56,667 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 34 statements into 2 equivalence classes. [2025-02-06 13:05:56,680 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 34 of 34 statements. [2025-02-06 13:05:56,680 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:05:56,680 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:05:56,816 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 13:05:56,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:05:56,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258885014] [2025-02-06 13:05:56,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258885014] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:05:56,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542767189] [2025-02-06 13:05:56,817 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:05:56,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:05:56,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:05:56,820 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 13:05:56,824 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 13:05:56,877 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 34 statements into 2 equivalence classes. [2025-02-06 13:05:56,902 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 34 of 34 statements. [2025-02-06 13:05:56,902 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:05:56,902 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:05:56,904 INFO L256 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-02-06 13:05:56,905 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:05:56,975 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 13:05:56,975 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:05:57,021 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 13:05:57,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542767189] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-06 13:05:57,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-06 13:05:57,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 10 [2025-02-06 13:05:57,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527279534] [2025-02-06 13:05:57,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:05:57,022 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:05:57,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:05:57,023 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:05:57,023 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2025-02-06 13:05:57,026 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 64 [2025-02-06 13:05:57,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 62 transitions, 255 flow. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:05:57,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:05:57,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 64 [2025-02-06 13:05:57,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:05:58,100 INFO L124 PetriNetUnfolderBase]: 13090/17902 cut-off events. [2025-02-06 13:05:58,100 INFO L125 PetriNetUnfolderBase]: For 12376/12376 co-relation queries the response was YES. [2025-02-06 13:05:58,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47694 conditions, 17902 events. 13090/17902 cut-off events. For 12376/12376 co-relation queries the response was YES. Maximal size of possible extension queue 702. Compared 101111 event pairs, 1949 based on Foata normal form. 224/18088 useless extension candidates. Maximal degree in co-relation 47653. Up to 5247 conditions per place. [2025-02-06 13:05:58,207 INFO L140 encePairwiseOnDemand]: 57/64 looper letters, 102 selfloop transitions, 16 changer transitions 0/126 dead transitions. [2025-02-06 13:05:58,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 126 transitions, 693 flow [2025-02-06 13:05:58,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 13:05:58,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-06 13:05:58,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 202 transitions. [2025-02-06 13:05:58,216 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5260416666666666 [2025-02-06 13:05:58,216 INFO L175 Difference]: Start difference. First operand has 73 places, 62 transitions, 255 flow. Second operand 6 states and 202 transitions. [2025-02-06 13:05:58,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 126 transitions, 693 flow [2025-02-06 13:05:58,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 126 transitions, 677 flow, removed 4 selfloop flow, removed 2 redundant places. [2025-02-06 13:05:58,238 INFO L231 Difference]: Finished difference. Result has 79 places, 71 transitions, 359 flow [2025-02-06 13:05:58,239 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=359, PETRI_PLACES=79, PETRI_TRANSITIONS=71} [2025-02-06 13:05:58,239 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 13 predicate places. [2025-02-06 13:05:58,240 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 71 transitions, 359 flow [2025-02-06 13:05:58,240 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:05:58,240 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:05:58,240 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:05:58,254 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-02-06 13:05:58,440 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-02-06 13:05:58,441 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-02-06 13:05:58,442 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:05:58,442 INFO L85 PathProgramCache]: Analyzing trace with hash 310137996, now seen corresponding path program 1 times [2025-02-06 13:05:58,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:05:58,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022230767] [2025-02-06 13:05:58,442 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:05:58,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:05:58,452 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-02-06 13:05:58,477 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-02-06 13:05:58,479 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:05:58,479 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:05:58,831 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:05:58,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:05:58,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022230767] [2025-02-06 13:05:58,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022230767] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:05:58,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121793335] [2025-02-06 13:05:58,833 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:05:58,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:05:58,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:05:58,835 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 13:05:58,836 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 13:05:58,892 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-02-06 13:05:58,916 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-02-06 13:05:58,916 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:05:58,916 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:05:58,918 INFO L256 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-02-06 13:05:58,921 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:05:58,950 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 1 [2025-02-06 13:05:59,091 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 5 treesize of output 3 [2025-02-06 13:05:59,099 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 10 treesize of output 8 [2025-02-06 13:05:59,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2025-02-06 13:05:59,247 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:05:59,247 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:05:59,356 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 6 treesize of output 4 [2025-02-06 13:05:59,359 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 10 treesize of output 8 [2025-02-06 13:05:59,705 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 39 treesize of output 35 [2025-02-06 13:05:59,711 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 47 treesize of output 35 [2025-02-06 13:05:59,761 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:05:59,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121793335] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:05:59,761 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:05:59,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2025-02-06 13:05:59,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128397106] [2025-02-06 13:05:59,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:05:59,762 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-02-06 13:05:59,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:05:59,762 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-02-06 13:05:59,762 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2025-02-06 13:05:59,828 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 64 [2025-02-06 13:05:59,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 71 transitions, 359 flow. Second operand has 18 states, 18 states have (on average 22.333333333333332) internal successors, (402), 18 states have internal predecessors, (402), 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 13:05:59,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:05:59,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 64 [2025-02-06 13:05:59,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:04,267 INFO L124 PetriNetUnfolderBase]: 36424/52785 cut-off events. [2025-02-06 13:06:04,268 INFO L125 PetriNetUnfolderBase]: For 89695/89994 co-relation queries the response was YES. [2025-02-06 13:06:04,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160694 conditions, 52785 events. 36424/52785 cut-off events. For 89695/89994 co-relation queries the response was YES. Maximal size of possible extension queue 2001. Compared 374421 event pairs, 3170 based on Foata normal form. 329/53079 useless extension candidates. Maximal degree in co-relation 74270. Up to 15450 conditions per place. [2025-02-06 13:06:04,529 INFO L140 encePairwiseOnDemand]: 53/64 looper letters, 292 selfloop transitions, 63 changer transitions 6/372 dead transitions. [2025-02-06 13:06:04,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 372 transitions, 2391 flow [2025-02-06 13:06:04,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-02-06 13:06:04,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2025-02-06 13:06:04,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 696 transitions. [2025-02-06 13:06:04,531 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5178571428571429 [2025-02-06 13:06:04,531 INFO L175 Difference]: Start difference. First operand has 79 places, 71 transitions, 359 flow. Second operand 21 states and 696 transitions. [2025-02-06 13:06:04,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 372 transitions, 2391 flow [2025-02-06 13:06:04,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 372 transitions, 2334 flow, removed 24 selfloop flow, removed 1 redundant places. [2025-02-06 13:06:04,807 INFO L231 Difference]: Finished difference. Result has 108 places, 126 transitions, 1037 flow [2025-02-06 13:06:04,807 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1037, PETRI_PLACES=108, PETRI_TRANSITIONS=126} [2025-02-06 13:06:04,807 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 42 predicate places. [2025-02-06 13:06:04,808 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 126 transitions, 1037 flow [2025-02-06 13:06:04,808 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 22.333333333333332) internal successors, (402), 18 states have internal predecessors, (402), 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 13:06:04,808 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:04,808 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:04,817 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 13:06:05,012 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,SelfDestructingSolverStorable14 [2025-02-06 13:06:05,012 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-02-06 13:06:05,012 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:05,013 INFO L85 PathProgramCache]: Analyzing trace with hash -17274899, now seen corresponding path program 1 times [2025-02-06 13:06:05,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:05,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323222673] [2025-02-06 13:06:05,013 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:06:05,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:05,020 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-02-06 13:06:05,046 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-02-06 13:06:05,052 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:05,053 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:05,731 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:06:05,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:05,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323222673] [2025-02-06 13:06:05,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323222673] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:06:05,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545496943] [2025-02-06 13:06:05,732 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:06:05,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:05,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:05,734 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 13:06:05,735 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 13:06:05,788 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-02-06 13:06:05,814 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-02-06 13:06:05,814 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:05,814 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:05,817 INFO L256 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-02-06 13:06:05,819 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:06:05,925 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 5 treesize of output 3 [2025-02-06 13:06:05,929 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 10 treesize of output 8 [2025-02-06 13:06:05,961 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 25 treesize of output 7 [2025-02-06 13:06:05,968 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-06 13:06:05,968 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:06:06,025 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 13:06:06,025 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2025-02-06 13:06:06,221 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-02-06 13:06:06,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545496943] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:06:06,222 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:06:06,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 5] total 14 [2025-02-06 13:06:06,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91258966] [2025-02-06 13:06:06,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:06:06,222 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-02-06 13:06:06,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:06,223 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-02-06 13:06:06,223 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2025-02-06 13:06:06,272 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 64 [2025-02-06 13:06:06,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 126 transitions, 1037 flow. Second operand has 15 states, 15 states have (on average 23.4) internal successors, (351), 15 states have internal predecessors, (351), 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 13:06:06,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:06,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 64 [2025-02-06 13:06:06,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:13,972 INFO L124 PetriNetUnfolderBase]: 52937/76218 cut-off events. [2025-02-06 13:06:13,972 INFO L125 PetriNetUnfolderBase]: For 206442/207498 co-relation queries the response was YES. [2025-02-06 13:06:14,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 247436 conditions, 76218 events. 52937/76218 cut-off events. For 206442/207498 co-relation queries the response was YES. Maximal size of possible extension queue 2867. Compared 559700 event pairs, 3981 based on Foata normal form. 288/76450 useless extension candidates. Maximal degree in co-relation 233294. Up to 22831 conditions per place. [2025-02-06 13:06:14,678 INFO L140 encePairwiseOnDemand]: 55/64 looper letters, 244 selfloop transitions, 90 changer transitions 2/347 dead transitions. [2025-02-06 13:06:14,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 347 transitions, 2787 flow [2025-02-06 13:06:14,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-02-06 13:06:14,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2025-02-06 13:06:14,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 571 transitions. [2025-02-06 13:06:14,681 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4956597222222222 [2025-02-06 13:06:14,681 INFO L175 Difference]: Start difference. First operand has 108 places, 126 transitions, 1037 flow. Second operand 18 states and 571 transitions. [2025-02-06 13:06:14,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 347 transitions, 2787 flow [2025-02-06 13:06:17,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 347 transitions, 2712 flow, removed 35 selfloop flow, removed 2 redundant places. [2025-02-06 13:06:17,631 INFO L231 Difference]: Finished difference. Result has 129 places, 170 transitions, 1742 flow [2025-02-06 13:06:17,632 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=976, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1742, PETRI_PLACES=129, PETRI_TRANSITIONS=170} [2025-02-06 13:06:17,632 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 63 predicate places. [2025-02-06 13:06:17,632 INFO L471 AbstractCegarLoop]: Abstraction has has 129 places, 170 transitions, 1742 flow [2025-02-06 13:06:17,632 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 23.4) internal successors, (351), 15 states have internal predecessors, (351), 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 13:06:17,632 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:17,633 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:17,639 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 13:06:17,837 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:17,837 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-02-06 13:06:17,838 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:17,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1705993970, now seen corresponding path program 1 times [2025-02-06 13:06:17,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:17,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819639483] [2025-02-06 13:06:17,838 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:06:17,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:17,846 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 42 statements into 1 equivalence classes. [2025-02-06 13:06:17,851 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 42 of 42 statements. [2025-02-06 13:06:17,852 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:17,852 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:17,900 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-06 13:06:17,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:17,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819639483] [2025-02-06 13:06:17,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819639483] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:06:17,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:06:17,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 13:06:17,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785485093] [2025-02-06 13:06:17,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:06:17,902 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 13:06:17,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:17,903 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 13:06:17,903 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 13:06:17,903 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 64 [2025-02-06 13:06:17,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 170 transitions, 1742 flow. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:17,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:17,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 64 [2025-02-06 13:06:17,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:26,407 INFO L124 PetriNetUnfolderBase]: 62595/90491 cut-off events. [2025-02-06 13:06:26,407 INFO L125 PetriNetUnfolderBase]: For 381350/383372 co-relation queries the response was YES. [2025-02-06 13:06:27,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 309398 conditions, 90491 events. 62595/90491 cut-off events. For 381350/383372 co-relation queries the response was YES. Maximal size of possible extension queue 3070. Compared 677638 event pairs, 29210 based on Foata normal form. 1599/91994 useless extension candidates. Maximal degree in co-relation 290663. Up to 44477 conditions per place. [2025-02-06 13:06:27,385 INFO L140 encePairwiseOnDemand]: 61/64 looper letters, 209 selfloop transitions, 10 changer transitions 0/230 dead transitions. [2025-02-06 13:06:27,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 230 transitions, 2810 flow [2025-02-06 13:06:27,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 13:06:27,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 13:06:27,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 113 transitions. [2025-02-06 13:06:27,386 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5885416666666666 [2025-02-06 13:06:27,386 INFO L175 Difference]: Start difference. First operand has 129 places, 170 transitions, 1742 flow. Second operand 3 states and 113 transitions. [2025-02-06 13:06:27,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 230 transitions, 2810 flow [2025-02-06 13:06:32,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 230 transitions, 2697 flow, removed 43 selfloop flow, removed 5 redundant places. [2025-02-06 13:06:32,154 INFO L231 Difference]: Finished difference. Result has 127 places, 171 transitions, 1742 flow [2025-02-06 13:06:32,154 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=1672, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1742, PETRI_PLACES=127, PETRI_TRANSITIONS=171} [2025-02-06 13:06:32,154 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 61 predicate places. [2025-02-06 13:06:32,154 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 171 transitions, 1742 flow [2025-02-06 13:06:32,154 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:32,155 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:32,155 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:32,155 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2025-02-06 13:06:32,155 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-02-06 13:06:32,155 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:32,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1052478533, now seen corresponding path program 2 times [2025-02-06 13:06:32,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:32,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474202810] [2025-02-06 13:06:32,156 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:06:32,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:32,164 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 45 statements into 2 equivalence classes. [2025-02-06 13:06:32,228 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 45 of 45 statements. [2025-02-06 13:06:32,228 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:06:32,228 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:33,354 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:06:33,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:33,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474202810] [2025-02-06 13:06:33,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474202810] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:06:33,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368477367] [2025-02-06 13:06:33,355 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:06:33,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:33,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:33,358 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 13:06:33,358 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 13:06:33,414 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 45 statements into 2 equivalence classes. [2025-02-06 13:06:33,446 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 45 of 45 statements. [2025-02-06 13:06:33,446 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:06:33,446 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:33,449 INFO L256 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 32 conjuncts are in the unsatisfiable core [2025-02-06 13:06:33,455 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:06:33,828 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 9 treesize of output 7 [2025-02-06 13:06:33,833 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 5 treesize of output 3 [2025-02-06 13:06:34,064 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 13:06:34,065 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 12 [2025-02-06 13:06:34,072 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:06:34,072 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:06:34,535 INFO L173 IndexEqualityManager]: detected equality via solver [2025-02-06 13:06:34,547 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 13:06:34,548 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 41 [2025-02-06 13:06:34,551 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 10 treesize of output 8 [2025-02-06 13:06:34,767 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:06:34,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368477367] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:06:34,767 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:06:34,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2025-02-06 13:06:34,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974453529] [2025-02-06 13:06:34,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:06:34,768 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-02-06 13:06:34,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:34,769 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-02-06 13:06:34,769 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2025-02-06 13:06:34,980 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 64 [2025-02-06 13:06:34,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 171 transitions, 1742 flow. Second operand has 28 states, 28 states have (on average 21.607142857142858) internal successors, (605), 28 states have internal predecessors, (605), 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 13:06:34,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:34,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 64 [2025-02-06 13:06:34,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand