./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8fc3dc66 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/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 d2a575889db2e07e0d6a3fd2f8635ba39d2afc2713d706bcd4d4aaa862bed792 --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-17 14:31:51,287 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-17 14:31:51,341 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-03-17 14:31:51,348 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-17 14:31:51,351 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-17 14:31:51,371 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-17 14:31:51,372 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-17 14:31:51,372 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-17 14:31:51,372 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-17 14:31:51,373 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-17 14:31:51,373 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-17 14:31:51,373 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-17 14:31:51,374 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-17 14:31:51,374 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-17 14:31:51,374 INFO L153 SettingsManager]: * Use SBE=true [2025-03-17 14:31:51,374 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-17 14:31:51,374 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-17 14:31:51,374 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-17 14:31:51,374 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-17 14:31:51,375 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-17 14:31:51,375 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-17 14:31:51,375 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-17 14:31:51,375 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-17 14:31:51,375 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-17 14:31:51,375 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-17 14:31:51,375 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-17 14:31:51,375 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-17 14:31:51,375 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-17 14:31:51,375 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-17 14:31:51,375 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-17 14:31:51,375 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-17 14:31:51,375 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-17 14:31:51,375 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-17 14:31:51,376 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 14:31:51,376 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-17 14:31:51,376 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-17 14:31:51,376 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-17 14:31:51,376 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-17 14:31:51,376 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-17 14:31:51,376 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-17 14:31:51,377 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-17 14:31:51,377 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-17 14:31:51,377 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/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 -> d2a575889db2e07e0d6a3fd2f8635ba39d2afc2713d706bcd4d4aaa862bed792 [2025-03-17 14:31:51,592 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-17 14:31:51,598 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-17 14:31:51,601 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-17 14:31:51,602 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-17 14:31:51,603 INFO L274 PluginConnector]: CDTParser initialized [2025-03-17 14:31:51,604 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c [2025-03-17 14:31:52,718 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e341ddcb/9204de94d59b41c7a3b9f3e699b1a6ad/FLAGfeef2a180 [2025-03-17 14:31:52,950 INFO L384 CDTParser]: Found 1 translation units. [2025-03-17 14:31:52,951 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c [2025-03-17 14:31:52,960 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e341ddcb/9204de94d59b41c7a3b9f3e699b1a6ad/FLAGfeef2a180 [2025-03-17 14:31:53,002 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e341ddcb/9204de94d59b41c7a3b9f3e699b1a6ad [2025-03-17 14:31:53,005 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-17 14:31:53,006 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-17 14:31:53,007 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-17 14:31:53,008 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-17 14:31:53,011 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-17 14:31:53,012 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 02:31:53" (1/1) ... [2025-03-17 14:31:53,013 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55bee783 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:31:53, skipping insertion in model container [2025-03-17 14:31:53,013 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 02:31:53" (1/1) ... [2025-03-17 14:31:53,029 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-17 14:31:53,156 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-17 14:31:53,158 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 14:31:53,166 INFO L200 MainTranslator]: Completed pre-run [2025-03-17 14:31:53,181 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 14:31:53,190 INFO L204 MainTranslator]: Completed translation [2025-03-17 14:31:53,191 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:31:53 WrapperNode [2025-03-17 14:31:53,191 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-17 14:31:53,192 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-17 14:31:53,192 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-17 14:31:53,192 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-17 14:31:53,196 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:31:53" (1/1) ... [2025-03-17 14:31:53,200 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:31:53" (1/1) ... [2025-03-17 14:31:53,214 INFO L138 Inliner]: procedures = 23, calls = 28, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 136 [2025-03-17 14:31:53,215 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-17 14:31:53,215 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-17 14:31:53,215 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-17 14:31:53,215 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-17 14:31:53,223 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:31:53" (1/1) ... [2025-03-17 14:31:53,224 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:31:53" (1/1) ... [2025-03-17 14:31:53,225 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:31:53" (1/1) ... [2025-03-17 14:31:53,234 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2025-03-17 14:31:53,234 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:31:53" (1/1) ... [2025-03-17 14:31:53,235 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:31:53" (1/1) ... [2025-03-17 14:31:53,238 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:31:53" (1/1) ... [2025-03-17 14:31:53,239 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:31:53" (1/1) ... [2025-03-17 14:31:53,240 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:31:53" (1/1) ... [2025-03-17 14:31:53,240 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:31:53" (1/1) ... [2025-03-17 14:31:53,241 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-17 14:31:53,242 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-17 14:31:53,242 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-17 14:31:53,242 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-17 14:31:53,246 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:31:53" (1/1) ... [2025-03-17 14:31:53,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 14:31:53,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:31:53,269 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-17 14:31:53,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-17 14:31:53,288 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-17 14:31:53,288 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-17 14:31:53,288 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-17 14:31:53,288 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-17 14:31:53,288 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-17 14:31:53,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-17 14:31:53,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-17 14:31:53,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-17 14:31:53,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-17 14:31:53,288 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-03-17 14:31:53,288 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-03-17 14:31:53,288 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-17 14:31:53,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-17 14:31:53,289 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-17 14:31:53,289 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-17 14:31:53,289 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-17 14:31:53,290 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-17 14:31:53,376 INFO L256 CfgBuilder]: Building ICFG [2025-03-17 14:31:53,377 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-17 14:31:53,581 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-17 14:31:53,581 INFO L307 CfgBuilder]: Performing block encoding [2025-03-17 14:31:53,728 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-17 14:31:53,731 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-17 14:31:53,731 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 02:31:53 BoogieIcfgContainer [2025-03-17 14:31:53,731 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-17 14:31:53,733 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-17 14:31:53,733 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-17 14:31:53,738 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-17 14:31:53,738 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 02:31:53" (1/3) ... [2025-03-17 14:31:53,739 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c7f6738 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 02:31:53, skipping insertion in model container [2025-03-17 14:31:53,739 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:31:53" (2/3) ... [2025-03-17 14:31:53,739 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c7f6738 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 02:31:53, skipping insertion in model container [2025-03-17 14:31:53,740 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 02:31:53" (3/3) ... [2025-03-17 14:31:53,741 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-send-receive-alt.wvr.c [2025-03-17 14:31:53,752 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-17 14:31:53,754 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-send-receive-alt.wvr.c that has 3 procedures, 38 locations, 1 initial locations, 3 loop locations, and 10 error locations. [2025-03-17 14:31:53,754 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-17 14:31:53,799 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-03-17 14:31:53,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 44 places, 43 transitions, 100 flow [2025-03-17 14:31:53,852 INFO L124 PetriNetUnfolderBase]: 6/41 cut-off events. [2025-03-17 14:31:53,854 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-17 14:31:53,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 41 events. 6/41 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 88 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 29. Up to 2 conditions per place. [2025-03-17 14:31:53,856 INFO L82 GeneralOperation]: Start removeDead. Operand has 44 places, 43 transitions, 100 flow [2025-03-17 14:31:53,860 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 40 transitions, 92 flow [2025-03-17 14:31:53,866 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-17 14:31:53,880 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;@7a77127a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-17 14:31:53,882 INFO L334 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2025-03-17 14:31:53,884 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-17 14:31:53,885 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-03-17 14:31:53,885 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-17 14:31:53,885 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:31:53,886 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-17 14:31:53,886 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-17 14:31:53,890 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:31:53,890 INFO L85 PathProgramCache]: Analyzing trace with hash 379375, now seen corresponding path program 1 times [2025-03-17 14:31:53,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:31:53,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254504329] [2025-03-17 14:31:53,899 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:31:53,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:31:53,977 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-17 14:31:53,995 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-17 14:31:53,995 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:31:53,996 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:31:54,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:31:54,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:31:54,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254504329] [2025-03-17 14:31:54,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254504329] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:31:54,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:31:54,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-03-17 14:31:54,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057877819] [2025-03-17 14:31:54,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:31:54,107 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 14:31:54,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:31:54,128 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 14:31:54,128 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 14:31:54,136 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2025-03-17 14:31:54,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 40 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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) [2025-03-17 14:31:54,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:31:54,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2025-03-17 14:31:54,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:31:54,287 INFO L124 PetriNetUnfolderBase]: 308/550 cut-off events. [2025-03-17 14:31:54,288 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2025-03-17 14:31:54,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1083 conditions, 550 events. 308/550 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2418 event pairs, 250 based on Foata normal form. 1/377 useless extension candidates. Maximal degree in co-relation 1005. Up to 497 conditions per place. [2025-03-17 14:31:54,296 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 27 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2025-03-17 14:31:54,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 35 transitions, 140 flow [2025-03-17 14:31:54,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 14:31:54,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 14:31:54,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 60 transitions. [2025-03-17 14:31:54,307 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2025-03-17 14:31:54,309 INFO L175 Difference]: Start difference. First operand has 41 places, 40 transitions, 92 flow. Second operand 3 states and 60 transitions. [2025-03-17 14:31:54,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 35 transitions, 140 flow [2025-03-17 14:31:54,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 35 transitions, 132 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-17 14:31:54,314 INFO L231 Difference]: Finished difference. Result has 36 places, 35 transitions, 78 flow [2025-03-17 14:31:54,315 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=36, PETRI_TRANSITIONS=35} [2025-03-17 14:31:54,317 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, -5 predicate places. [2025-03-17 14:31:54,317 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 35 transitions, 78 flow [2025-03-17 14:31:54,318 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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) [2025-03-17 14:31:54,318 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:31:54,318 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-17 14:31:54,318 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-17 14:31:54,318 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-17 14:31:54,319 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:31:54,319 INFO L85 PathProgramCache]: Analyzing trace with hash 379376, now seen corresponding path program 1 times [2025-03-17 14:31:54,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:31:54,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105143328] [2025-03-17 14:31:54,319 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:31:54,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:31:54,324 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-17 14:31:54,354 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-17 14:31:54,354 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:31:54,354 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:31:54,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:31:54,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:31:54,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105143328] [2025-03-17 14:31:54,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105143328] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:31:54,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:31:54,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 14:31:54,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575074994] [2025-03-17 14:31:54,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:31:54,554 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:31:54,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:31:54,555 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:31:54,555 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:31:54,562 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2025-03-17 14:31:54,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 35 transitions, 78 flow. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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) [2025-03-17 14:31:54,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:31:54,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2025-03-17 14:31:54,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:31:54,731 INFO L124 PetriNetUnfolderBase]: 309/553 cut-off events. [2025-03-17 14:31:54,731 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2025-03-17 14:31:54,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1071 conditions, 553 events. 309/553 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2435 event pairs, 250 based on Foata normal form. 0/379 useless extension candidates. Maximal degree in co-relation 1049. Up to 502 conditions per place. [2025-03-17 14:31:54,737 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 29 selfloop transitions, 4 changer transitions 0/38 dead transitions. [2025-03-17 14:31:54,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 38 transitions, 152 flow [2025-03-17 14:31:54,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:31:54,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:31:54,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 70 transitions. [2025-03-17 14:31:54,738 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2025-03-17 14:31:54,738 INFO L175 Difference]: Start difference. First operand has 36 places, 35 transitions, 78 flow. Second operand 4 states and 70 transitions. [2025-03-17 14:31:54,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 38 transitions, 152 flow [2025-03-17 14:31:54,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 38 transitions, 146 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:31:54,739 INFO L231 Difference]: Finished difference. Result has 39 places, 38 transitions, 101 flow [2025-03-17 14:31:54,740 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=101, PETRI_PLACES=39, PETRI_TRANSITIONS=38} [2025-03-17 14:31:54,740 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, -2 predicate places. [2025-03-17 14:31:54,740 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 38 transitions, 101 flow [2025-03-17 14:31:54,740 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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) [2025-03-17 14:31:54,740 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:31:54,740 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2025-03-17 14:31:54,740 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-17 14:31:54,741 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-17 14:31:54,741 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:31:54,741 INFO L85 PathProgramCache]: Analyzing trace with hash 364592610, now seen corresponding path program 1 times [2025-03-17 14:31:54,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:31:54,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25728593] [2025-03-17 14:31:54,742 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:31:54,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:31:54,749 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-03-17 14:31:54,762 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-03-17 14:31:54,766 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:31:54,766 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:31:54,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:31:54,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:31:54,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25728593] [2025-03-17 14:31:54,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25728593] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:31:54,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98065416] [2025-03-17 14:31:54,974 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:31:54,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:31:54,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:31:54,976 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:31:54,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-17 14:31:55,012 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-03-17 14:31:55,021 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-03-17 14:31:55,022 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:31:55,022 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:31:55,023 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-17 14:31:55,026 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:31:55,070 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 [2025-03-17 14:31:55,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:31:55,171 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:31:55,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:31:55,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98065416] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:31:55,258 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:31:55,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2025-03-17 14:31:55,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073712139] [2025-03-17 14:31:55,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:31:55,258 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-17 14:31:55,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:31:55,259 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-17 14:31:55,260 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2025-03-17 14:31:55,291 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2025-03-17 14:31:55,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 101 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 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) [2025-03-17 14:31:55,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:31:55,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2025-03-17 14:31:55,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:31:55,524 INFO L124 PetriNetUnfolderBase]: 310/555 cut-off events. [2025-03-17 14:31:55,524 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2025-03-17 14:31:55,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1087 conditions, 555 events. 310/555 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2436 event pairs, 250 based on Foata normal form. 0/380 useless extension candidates. Maximal degree in co-relation 1056. Up to 499 conditions per place. [2025-03-17 14:31:55,527 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 25 selfloop transitions, 10 changer transitions 0/40 dead transitions. [2025-03-17 14:31:55,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 40 transitions, 179 flow [2025-03-17 14:31:55,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-17 14:31:55,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-17 14:31:55,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 109 transitions. [2025-03-17 14:31:55,529 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3168604651162791 [2025-03-17 14:31:55,529 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 101 flow. Second operand 8 states and 109 transitions. [2025-03-17 14:31:55,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 40 transitions, 179 flow [2025-03-17 14:31:55,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 40 transitions, 176 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 14:31:55,530 INFO L231 Difference]: Finished difference. Result has 44 places, 40 transitions, 126 flow [2025-03-17 14:31:55,530 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=126, PETRI_PLACES=44, PETRI_TRANSITIONS=40} [2025-03-17 14:31:55,530 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 3 predicate places. [2025-03-17 14:31:55,531 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 40 transitions, 126 flow [2025-03-17 14:31:55,531 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 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) [2025-03-17 14:31:55,531 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:31:55,531 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:31:55,541 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-17 14:31:55,731 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:31:55,732 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-17 14:31:55,732 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:31:55,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1756780238, now seen corresponding path program 1 times [2025-03-17 14:31:55,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:31:55,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852750520] [2025-03-17 14:31:55,732 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:31:55,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:31:55,737 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-17 14:31:55,740 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-17 14:31:55,740 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:31:55,740 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:31:55,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:31:55,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:31:55,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852750520] [2025-03-17 14:31:55,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852750520] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:31:55,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:31:55,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-03-17 14:31:55,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831082378] [2025-03-17 14:31:55,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:31:55,768 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 14:31:55,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:31:55,768 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 14:31:55,768 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 14:31:55,769 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2025-03-17 14:31:55,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 40 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2025-03-17 14:31:55,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:31:55,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2025-03-17 14:31:55,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:31:55,882 INFO L124 PetriNetUnfolderBase]: 405/745 cut-off events. [2025-03-17 14:31:55,882 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2025-03-17 14:31:55,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1466 conditions, 745 events. 405/745 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3458 event pairs, 186 based on Foata normal form. 22/528 useless extension candidates. Maximal degree in co-relation 1428. Up to 420 conditions per place. [2025-03-17 14:31:55,885 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 50 selfloop transitions, 3 changer transitions 0/58 dead transitions. [2025-03-17 14:31:55,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 58 transitions, 270 flow [2025-03-17 14:31:55,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 14:31:55,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 14:31:55,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 80 transitions. [2025-03-17 14:31:55,886 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6201550387596899 [2025-03-17 14:31:55,886 INFO L175 Difference]: Start difference. First operand has 44 places, 40 transitions, 126 flow. Second operand 3 states and 80 transitions. [2025-03-17 14:31:55,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 58 transitions, 270 flow [2025-03-17 14:31:55,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 58 transitions, 228 flow, removed 6 selfloop flow, removed 7 redundant places. [2025-03-17 14:31:55,887 INFO L231 Difference]: Finished difference. Result has 40 places, 42 transitions, 107 flow [2025-03-17 14:31:55,887 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=107, PETRI_PLACES=40, PETRI_TRANSITIONS=42} [2025-03-17 14:31:55,888 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, -1 predicate places. [2025-03-17 14:31:55,888 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 42 transitions, 107 flow [2025-03-17 14:31:55,888 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2025-03-17 14:31:55,888 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:31:55,888 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:31:55,888 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-17 14:31:55,888 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-17 14:31:55,888 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:31:55,888 INFO L85 PathProgramCache]: Analyzing trace with hash 464518530, now seen corresponding path program 1 times [2025-03-17 14:31:55,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:31:55,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086386058] [2025-03-17 14:31:55,890 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:31:55,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:31:55,896 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-17 14:31:55,899 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-17 14:31:55,900 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:31:55,900 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:31:55,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:31:55,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:31:55,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086386058] [2025-03-17 14:31:55,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086386058] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:31:55,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:31:55,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 14:31:55,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250536908] [2025-03-17 14:31:55,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:31:55,965 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:31:55,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:31:55,966 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:31:55,966 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:31:55,973 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2025-03-17 14:31:55,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 42 transitions, 107 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 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) [2025-03-17 14:31:55,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:31:55,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2025-03-17 14:31:55,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:31:56,062 INFO L124 PetriNetUnfolderBase]: 304/571 cut-off events. [2025-03-17 14:31:56,063 INFO L125 PetriNetUnfolderBase]: For 69/69 co-relation queries the response was YES. [2025-03-17 14:31:56,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1202 conditions, 571 events. 304/571 cut-off events. For 69/69 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2453 event pairs, 246 based on Foata normal form. 0/475 useless extension candidates. Maximal degree in co-relation 466. Up to 511 conditions per place. [2025-03-17 14:31:56,066 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 30 selfloop transitions, 4 changer transitions 0/39 dead transitions. [2025-03-17 14:31:56,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 39 transitions, 167 flow [2025-03-17 14:31:56,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:31:56,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:31:56,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 65 transitions. [2025-03-17 14:31:56,068 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.37790697674418605 [2025-03-17 14:31:56,068 INFO L175 Difference]: Start difference. First operand has 40 places, 42 transitions, 107 flow. Second operand 4 states and 65 transitions. [2025-03-17 14:31:56,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 39 transitions, 167 flow [2025-03-17 14:31:56,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 39 transitions, 164 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 14:31:56,071 INFO L231 Difference]: Finished difference. Result has 39 places, 39 transitions, 104 flow [2025-03-17 14:31:56,071 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=104, PETRI_PLACES=39, PETRI_TRANSITIONS=39} [2025-03-17 14:31:56,072 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, -2 predicate places. [2025-03-17 14:31:56,073 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 39 transitions, 104 flow [2025-03-17 14:31:56,073 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 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) [2025-03-17 14:31:56,073 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:31:56,073 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:31:56,073 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-17 14:31:56,073 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-17 14:31:56,074 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:31:56,074 INFO L85 PathProgramCache]: Analyzing trace with hash 464518531, now seen corresponding path program 1 times [2025-03-17 14:31:56,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:31:56,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372238503] [2025-03-17 14:31:56,074 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:31:56,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:31:56,079 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-17 14:31:56,084 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-17 14:31:56,084 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:31:56,084 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:31:56,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:31:56,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:31:56,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372238503] [2025-03-17 14:31:56,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372238503] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:31:56,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:31:56,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 14:31:56,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009733525] [2025-03-17 14:31:56,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:31:56,150 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:31:56,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:31:56,151 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:31:56,151 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:31:56,154 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2025-03-17 14:31:56,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 39 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 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) [2025-03-17 14:31:56,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:31:56,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2025-03-17 14:31:56,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:31:56,271 INFO L124 PetriNetUnfolderBase]: 371/708 cut-off events. [2025-03-17 14:31:56,271 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2025-03-17 14:31:56,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1462 conditions, 708 events. 371/708 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 3162 event pairs, 314 based on Foata normal form. 0/603 useless extension candidates. Maximal degree in co-relation 1155. Up to 516 conditions per place. [2025-03-17 14:31:56,274 INFO L140 encePairwiseOnDemand]: 39/43 looper letters, 45 selfloop transitions, 3 changer transitions 1/54 dead transitions. [2025-03-17 14:31:56,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 54 transitions, 236 flow [2025-03-17 14:31:56,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:31:56,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:31:56,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 85 transitions. [2025-03-17 14:31:56,276 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4941860465116279 [2025-03-17 14:31:56,276 INFO L175 Difference]: Start difference. First operand has 39 places, 39 transitions, 104 flow. Second operand 4 states and 85 transitions. [2025-03-17 14:31:56,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 54 transitions, 236 flow [2025-03-17 14:31:56,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 54 transitions, 231 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:31:56,278 INFO L231 Difference]: Finished difference. Result has 41 places, 39 transitions, 108 flow [2025-03-17 14:31:56,278 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=108, PETRI_PLACES=41, PETRI_TRANSITIONS=39} [2025-03-17 14:31:56,278 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2025-03-17 14:31:56,278 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 39 transitions, 108 flow [2025-03-17 14:31:56,278 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 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) [2025-03-17 14:31:56,278 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:31:56,278 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:31:56,279 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-03-17 14:31:56,279 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-17 14:31:56,279 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:31:56,279 INFO L85 PathProgramCache]: Analyzing trace with hash 2053084497, now seen corresponding path program 1 times [2025-03-17 14:31:56,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:31:56,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634670135] [2025-03-17 14:31:56,279 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:31:56,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:31:56,287 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-17 14:31:56,294 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-17 14:31:56,295 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:31:56,295 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:31:56,474 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:31:56,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:31:56,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634670135] [2025-03-17 14:31:56,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634670135] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:31:56,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711267880] [2025-03-17 14:31:56,475 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:31:56,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:31:56,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:31:56,477 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:31:56,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-17 14:31:56,516 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-17 14:31:56,529 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-17 14:31:56,529 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:31:56,529 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:31:56,532 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-03-17 14:31:56,535 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:31:56,545 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 [2025-03-17 14:31:56,643 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:31:56,644 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 14:31:56,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711267880] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:31:56,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 14:31:56,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 8 [2025-03-17 14:31:56,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40304891] [2025-03-17 14:31:56,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:31:56,644 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 14:31:56,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:31:56,645 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 14:31:56,645 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2025-03-17 14:31:56,656 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2025-03-17 14:31:56,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 39 transitions, 108 flow. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:31:56,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:31:56,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2025-03-17 14:31:56,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:31:56,806 INFO L124 PetriNetUnfolderBase]: 282/565 cut-off events. [2025-03-17 14:31:56,806 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2025-03-17 14:31:56,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1173 conditions, 565 events. 282/565 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 2423 event pairs, 202 based on Foata normal form. 48/550 useless extension candidates. Maximal degree in co-relation 877. Up to 438 conditions per place. [2025-03-17 14:31:56,810 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 29 selfloop transitions, 9 changer transitions 0/43 dead transitions. [2025-03-17 14:31:56,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 43 transitions, 193 flow [2025-03-17 14:31:56,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:31:56,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:31:56,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 84 transitions. [2025-03-17 14:31:56,811 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39069767441860465 [2025-03-17 14:31:56,811 INFO L175 Difference]: Start difference. First operand has 41 places, 39 transitions, 108 flow. Second operand 5 states and 84 transitions. [2025-03-17 14:31:56,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 43 transitions, 193 flow [2025-03-17 14:31:56,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 43 transitions, 188 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:31:56,812 INFO L231 Difference]: Finished difference. Result has 40 places, 36 transitions, 113 flow [2025-03-17 14:31:56,812 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=113, PETRI_PLACES=40, PETRI_TRANSITIONS=36} [2025-03-17 14:31:56,812 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, -1 predicate places. [2025-03-17 14:31:56,812 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 36 transitions, 113 flow [2025-03-17 14:31:56,813 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:31:56,813 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:31:56,813 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:31:56,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-17 14:31:57,013 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2025-03-17 14:31:57,013 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-17 14:31:57,014 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:31:57,014 INFO L85 PathProgramCache]: Analyzing trace with hash -665144115, now seen corresponding path program 1 times [2025-03-17 14:31:57,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:31:57,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040095475] [2025-03-17 14:31:57,014 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:31:57,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:31:57,018 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-17 14:31:57,021 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-17 14:31:57,021 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:31:57,021 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:31:57,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:31:57,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:31:57,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040095475] [2025-03-17 14:31:57,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040095475] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:31:57,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:31:57,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 14:31:57,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763316183] [2025-03-17 14:31:57,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:31:57,040 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 14:31:57,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:31:57,040 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 14:31:57,040 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 14:31:57,041 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2025-03-17 14:31:57,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 36 transitions, 113 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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) [2025-03-17 14:31:57,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:31:57,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2025-03-17 14:31:57,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:31:57,108 INFO L124 PetriNetUnfolderBase]: 356/673 cut-off events. [2025-03-17 14:31:57,108 INFO L125 PetriNetUnfolderBase]: For 269/269 co-relation queries the response was YES. [2025-03-17 14:31:57,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1537 conditions, 673 events. 356/673 cut-off events. For 269/269 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2789 event pairs, 220 based on Foata normal form. 3/605 useless extension candidates. Maximal degree in co-relation 1228. Up to 462 conditions per place. [2025-03-17 14:31:57,111 INFO L140 encePairwiseOnDemand]: 40/43 looper letters, 38 selfloop transitions, 2 changer transitions 5/50 dead transitions. [2025-03-17 14:31:57,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 50 transitions, 247 flow [2025-03-17 14:31:57,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 14:31:57,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 14:31:57,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 68 transitions. [2025-03-17 14:31:57,112 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5271317829457365 [2025-03-17 14:31:57,112 INFO L175 Difference]: Start difference. First operand has 40 places, 36 transitions, 113 flow. Second operand 3 states and 68 transitions. [2025-03-17 14:31:57,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 50 transitions, 247 flow [2025-03-17 14:31:57,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 50 transitions, 223 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-17 14:31:57,115 INFO L231 Difference]: Finished difference. Result has 39 places, 36 transitions, 104 flow [2025-03-17 14:31:57,116 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=39, PETRI_TRANSITIONS=36} [2025-03-17 14:31:57,116 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, -2 predicate places. [2025-03-17 14:31:57,117 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 36 transitions, 104 flow [2025-03-17 14:31:57,118 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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) [2025-03-17 14:31:57,118 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:31:57,118 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] [2025-03-17 14:31:57,118 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-03-17 14:31:57,118 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-17 14:31:57,118 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:31:57,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1846875675, now seen corresponding path program 1 times [2025-03-17 14:31:57,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:31:57,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689811065] [2025-03-17 14:31:57,118 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:31:57,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:31:57,125 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-17 14:31:57,146 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-17 14:31:57,146 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:31:57,146 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:31:57,481 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:31:57,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:31:57,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689811065] [2025-03-17 14:31:57,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689811065] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:31:57,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073444720] [2025-03-17 14:31:57,482 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:31:57,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:31:57,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:31:57,484 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:31:57,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-17 14:31:57,521 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-17 14:31:57,538 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-17 14:31:57,539 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:31:57,539 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:31:57,540 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-17 14:31:57,541 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:31:57,597 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 [2025-03-17 14:31:57,732 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:31:57,732 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:31:58,037 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 61 treesize of output 55 [2025-03-17 14:31:58,049 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 14:31:58,049 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 78 treesize of output 68 [2025-03-17 14:31:58,144 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:31:58,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073444720] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:31:58,144 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:31:58,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2025-03-17 14:31:58,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394624442] [2025-03-17 14:31:58,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:31:58,145 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-17 14:31:58,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:31:58,145 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-17 14:31:58,145 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2025-03-17 14:31:58,190 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2025-03-17 14:31:58,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 36 transitions, 104 flow. Second operand has 19 states, 19 states have (on average 13.473684210526315) internal successors, (256), 19 states have internal predecessors, (256), 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) [2025-03-17 14:31:58,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:31:58,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2025-03-17 14:31:58,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:31:59,141 INFO L124 PetriNetUnfolderBase]: 1418/2716 cut-off events. [2025-03-17 14:31:59,141 INFO L125 PetriNetUnfolderBase]: For 657/657 co-relation queries the response was YES. [2025-03-17 14:31:59,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5886 conditions, 2716 events. 1418/2716 cut-off events. For 657/657 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 16840 event pairs, 331 based on Foata normal form. 3/2411 useless extension candidates. Maximal degree in co-relation 3764. Up to 500 conditions per place. [2025-03-17 14:31:59,151 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 141 selfloop transitions, 36 changer transitions 62/244 dead transitions. [2025-03-17 14:31:59,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 244 transitions, 1154 flow [2025-03-17 14:31:59,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-17 14:31:59,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2025-03-17 14:31:59,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 449 transitions. [2025-03-17 14:31:59,153 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49723145071982283 [2025-03-17 14:31:59,153 INFO L175 Difference]: Start difference. First operand has 39 places, 36 transitions, 104 flow. Second operand 21 states and 449 transitions. [2025-03-17 14:31:59,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 244 transitions, 1154 flow [2025-03-17 14:31:59,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 244 transitions, 1120 flow, removed 13 selfloop flow, removed 2 redundant places. [2025-03-17 14:31:59,157 INFO L231 Difference]: Finished difference. Result has 66 places, 67 transitions, 380 flow [2025-03-17 14:31:59,157 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=380, PETRI_PLACES=66, PETRI_TRANSITIONS=67} [2025-03-17 14:31:59,158 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 25 predicate places. [2025-03-17 14:31:59,158 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 67 transitions, 380 flow [2025-03-17 14:31:59,158 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 13.473684210526315) internal successors, (256), 19 states have internal predecessors, (256), 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) [2025-03-17 14:31:59,158 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:31:59,158 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] [2025-03-17 14:31:59,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-17 14:31:59,359 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:31:59,359 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-17 14:31:59,360 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:31:59,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1062323975, now seen corresponding path program 1 times [2025-03-17 14:31:59,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:31:59,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434106769] [2025-03-17 14:31:59,360 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:31:59,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:31:59,365 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-17 14:31:59,378 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-17 14:31:59,378 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:31:59,379 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:31:59,413 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 14:31:59,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:31:59,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434106769] [2025-03-17 14:31:59,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434106769] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:31:59,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:31:59,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 14:31:59,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786601330] [2025-03-17 14:31:59,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:31:59,415 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 14:31:59,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:31:59,415 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 14:31:59,415 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 14:31:59,417 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2025-03-17 14:31:59,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 67 transitions, 380 flow. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 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) [2025-03-17 14:31:59,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:31:59,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2025-03-17 14:31:59,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:31:59,569 INFO L124 PetriNetUnfolderBase]: 1592/2821 cut-off events. [2025-03-17 14:31:59,569 INFO L125 PetriNetUnfolderBase]: For 3519/3519 co-relation queries the response was YES. [2025-03-17 14:31:59,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7476 conditions, 2821 events. 1592/2821 cut-off events. For 3519/3519 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 16053 event pairs, 896 based on Foata normal form. 44/2668 useless extension candidates. Maximal degree in co-relation 6655. Up to 2035 conditions per place. [2025-03-17 14:31:59,579 INFO L140 encePairwiseOnDemand]: 40/43 looper letters, 68 selfloop transitions, 2 changer transitions 3/76 dead transitions. [2025-03-17 14:31:59,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 76 transitions, 546 flow [2025-03-17 14:31:59,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 14:31:59,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 14:31:59,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 64 transitions. [2025-03-17 14:31:59,580 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49612403100775193 [2025-03-17 14:31:59,580 INFO L175 Difference]: Start difference. First operand has 66 places, 67 transitions, 380 flow. Second operand 3 states and 64 transitions. [2025-03-17 14:31:59,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 76 transitions, 546 flow [2025-03-17 14:31:59,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 76 transitions, 511 flow, removed 15 selfloop flow, removed 4 redundant places. [2025-03-17 14:31:59,599 INFO L231 Difference]: Finished difference. Result has 62 places, 58 transitions, 288 flow [2025-03-17 14:31:59,599 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=288, PETRI_PLACES=62, PETRI_TRANSITIONS=58} [2025-03-17 14:31:59,600 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 21 predicate places. [2025-03-17 14:31:59,600 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 58 transitions, 288 flow [2025-03-17 14:31:59,600 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 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) [2025-03-17 14:31:59,600 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:31:59,601 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 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] [2025-03-17 14:31:59,601 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-03-17 14:31:59,601 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-17 14:31:59,601 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:31:59,601 INFO L85 PathProgramCache]: Analyzing trace with hash -223071805, now seen corresponding path program 2 times [2025-03-17 14:31:59,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:31:59,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747413649] [2025-03-17 14:31:59,602 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:31:59,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:31:59,609 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 31 statements into 2 equivalence classes. [2025-03-17 14:31:59,620 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 31 of 31 statements. [2025-03-17 14:31:59,620 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:31:59,620 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:31:59,699 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:31:59,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:31:59,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747413649] [2025-03-17 14:31:59,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747413649] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:31:59,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648112975] [2025-03-17 14:31:59,700 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:31:59,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:31:59,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:31:59,702 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:31:59,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-17 14:31:59,737 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 31 statements into 2 equivalence classes. [2025-03-17 14:31:59,752 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 31 of 31 statements. [2025-03-17 14:31:59,752 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:31:59,752 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:31:59,753 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-17 14:31:59,754 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:31:59,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:31:59,870 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:32:00,015 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:32:00,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648112975] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:32:00,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:32:00,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 15 [2025-03-17 14:32:00,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338131627] [2025-03-17 14:32:00,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:32:00,017 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-17 14:32:00,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:32:00,018 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-17 14:32:00,018 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2025-03-17 14:32:00,035 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2025-03-17 14:32:00,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 58 transitions, 288 flow. Second operand has 16 states, 16 states have (on average 14.3125) internal successors, (229), 16 states have internal predecessors, (229), 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) [2025-03-17 14:32:00,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:32:00,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2025-03-17 14:32:00,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:32:00,331 INFO L124 PetriNetUnfolderBase]: 1138/2197 cut-off events. [2025-03-17 14:32:00,331 INFO L125 PetriNetUnfolderBase]: For 2393/2393 co-relation queries the response was YES. [2025-03-17 14:32:00,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5672 conditions, 2197 events. 1138/2197 cut-off events. For 2393/2393 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 13107 event pairs, 652 based on Foata normal form. 26/2074 useless extension candidates. Maximal degree in co-relation 5105. Up to 1171 conditions per place. [2025-03-17 14:32:00,337 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 32 selfloop transitions, 7 changer transitions 60/105 dead transitions. [2025-03-17 14:32:00,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 105 transitions, 614 flow [2025-03-17 14:32:00,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-17 14:32:00,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-17 14:32:00,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2025-03-17 14:32:00,339 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2025-03-17 14:32:00,339 INFO L175 Difference]: Start difference. First operand has 62 places, 58 transitions, 288 flow. Second operand 10 states and 185 transitions. [2025-03-17 14:32:00,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 105 transitions, 614 flow [2025-03-17 14:32:00,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 105 transitions, 599 flow, removed 6 selfloop flow, removed 2 redundant places. [2025-03-17 14:32:00,346 INFO L231 Difference]: Finished difference. Result has 72 places, 45 transitions, 224 flow [2025-03-17 14:32:00,346 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=224, PETRI_PLACES=72, PETRI_TRANSITIONS=45} [2025-03-17 14:32:00,346 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 31 predicate places. [2025-03-17 14:32:00,346 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 45 transitions, 224 flow [2025-03-17 14:32:00,347 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 14.3125) internal successors, (229), 16 states have internal predecessors, (229), 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) [2025-03-17 14:32:00,347 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:32:00,347 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 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] [2025-03-17 14:32:00,353 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-17 14:32:00,547 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:32:00,548 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-17 14:32:00,548 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:32:00,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1489003293, now seen corresponding path program 3 times [2025-03-17 14:32:00,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:32:00,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008174973] [2025-03-17 14:32:00,548 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:32:00,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:32:00,554 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 33 statements into 3 equivalence classes. [2025-03-17 14:32:00,564 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 31 of 33 statements. [2025-03-17 14:32:00,564 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 14:32:00,564 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:00,616 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-17 14:32:00,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:32:00,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008174973] [2025-03-17 14:32:00,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008174973] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:32:00,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617994937] [2025-03-17 14:32:00,616 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:32:00,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:32:00,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:32:00,618 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:32:00,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-17 14:32:00,657 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 33 statements into 3 equivalence classes. [2025-03-17 14:32:00,673 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 31 of 33 statements. [2025-03-17 14:32:00,673 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 14:32:00,673 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:00,674 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-17 14:32:00,675 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:32:00,703 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-17 14:32:00,703 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:32:00,774 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-17 14:32:00,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617994937] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:32:00,774 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:32:00,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 4] total 6 [2025-03-17 14:32:00,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598036298] [2025-03-17 14:32:00,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:32:00,775 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 14:32:00,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:32:00,775 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 14:32:00,776 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2025-03-17 14:32:00,776 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2025-03-17 14:32:00,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 45 transitions, 224 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 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) [2025-03-17 14:32:00,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:32:00,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2025-03-17 14:32:00,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:32:00,930 INFO L124 PetriNetUnfolderBase]: 1184/2280 cut-off events. [2025-03-17 14:32:00,930 INFO L125 PetriNetUnfolderBase]: For 4816/4816 co-relation queries the response was YES. [2025-03-17 14:32:00,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6524 conditions, 2280 events. 1184/2280 cut-off events. For 4816/4816 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 12849 event pairs, 461 based on Foata normal form. 22/2158 useless extension candidates. Maximal degree in co-relation 6485. Up to 786 conditions per place. [2025-03-17 14:32:00,939 INFO L140 encePairwiseOnDemand]: 39/43 looper letters, 59 selfloop transitions, 12 changer transitions 0/77 dead transitions. [2025-03-17 14:32:00,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 77 transitions, 533 flow [2025-03-17 14:32:00,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:32:00,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:32:00,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 93 transitions. [2025-03-17 14:32:00,940 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5406976744186046 [2025-03-17 14:32:00,940 INFO L175 Difference]: Start difference. First operand has 72 places, 45 transitions, 224 flow. Second operand 4 states and 93 transitions. [2025-03-17 14:32:00,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 77 transitions, 533 flow [2025-03-17 14:32:00,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 77 transitions, 447 flow, removed 36 selfloop flow, removed 12 redundant places. [2025-03-17 14:32:00,947 INFO L231 Difference]: Finished difference. Result has 54 places, 53 transitions, 298 flow [2025-03-17 14:32:00,948 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=298, PETRI_PLACES=54, PETRI_TRANSITIONS=53} [2025-03-17 14:32:00,948 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 13 predicate places. [2025-03-17 14:32:00,948 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 53 transitions, 298 flow [2025-03-17 14:32:00,948 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 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) [2025-03-17 14:32:00,948 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:32:00,948 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:32:00,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-17 14:32:01,149 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-03-17 14:32:01,149 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-17 14:32:01,150 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:32:01,150 INFO L85 PathProgramCache]: Analyzing trace with hash 83824053, now seen corresponding path program 4 times [2025-03-17 14:32:01,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:32:01,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329897696] [2025-03-17 14:32:01,150 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 14:32:01,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:32:01,156 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 34 statements into 2 equivalence classes. [2025-03-17 14:32:01,191 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 34 of 34 statements. [2025-03-17 14:32:01,192 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 14:32:01,192 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:01,791 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-17 14:32:01,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:32:01,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329897696] [2025-03-17 14:32:01,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329897696] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:32:01,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170880157] [2025-03-17 14:32:01,792 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 14:32:01,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:32:01,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:32:01,794 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:32:01,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-17 14:32:01,836 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 34 statements into 2 equivalence classes. [2025-03-17 14:32:01,864 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 34 of 34 statements. [2025-03-17 14:32:01,864 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 14:32:01,864 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:01,868 INFO L256 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-17 14:32:01,869 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:32:01,969 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 14:32:01,969 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:32:02,014 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 14:32:02,014 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 40 treesize of output 24 [2025-03-17 14:32:02,094 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-03-17 14:32:02,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170880157] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 14:32:02,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 14:32:02,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9, 7] total 17 [2025-03-17 14:32:02,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252174528] [2025-03-17 14:32:02,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:32:02,096 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:32:02,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:32:02,096 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:32:02,097 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2025-03-17 14:32:02,097 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2025-03-17 14:32:02,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 53 transitions, 298 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 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) [2025-03-17 14:32:02,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:32:02,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2025-03-17 14:32:02,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:32:02,281 INFO L124 PetriNetUnfolderBase]: 1433/2666 cut-off events. [2025-03-17 14:32:02,282 INFO L125 PetriNetUnfolderBase]: For 2872/2882 co-relation queries the response was YES. [2025-03-17 14:32:02,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7058 conditions, 2666 events. 1433/2666 cut-off events. For 2872/2882 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 14757 event pairs, 381 based on Foata normal form. 7/2500 useless extension candidates. Maximal degree in co-relation 3919. Up to 862 conditions per place. [2025-03-17 14:32:02,294 INFO L140 encePairwiseOnDemand]: 39/43 looper letters, 66 selfloop transitions, 12 changer transitions 14/98 dead transitions. [2025-03-17 14:32:02,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 98 transitions, 658 flow [2025-03-17 14:32:02,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:32:02,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:32:02,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 114 transitions. [2025-03-17 14:32:02,295 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5302325581395348 [2025-03-17 14:32:02,295 INFO L175 Difference]: Start difference. First operand has 54 places, 53 transitions, 298 flow. Second operand 5 states and 114 transitions. [2025-03-17 14:32:02,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 98 transitions, 658 flow [2025-03-17 14:32:02,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 98 transitions, 636 flow, removed 11 selfloop flow, removed 0 redundant places. [2025-03-17 14:32:02,298 INFO L231 Difference]: Finished difference. Result has 59 places, 55 transitions, 346 flow [2025-03-17 14:32:02,298 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=346, PETRI_PLACES=59, PETRI_TRANSITIONS=55} [2025-03-17 14:32:02,300 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 18 predicate places. [2025-03-17 14:32:02,300 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 55 transitions, 346 flow [2025-03-17 14:32:02,300 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 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) [2025-03-17 14:32:02,300 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:32:02,300 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:32:02,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-17 14:32:02,500 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:32:02,501 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-17 14:32:02,502 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:32:02,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1044408767, now seen corresponding path program 5 times [2025-03-17 14:32:02,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:32:02,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325720258] [2025-03-17 14:32:02,502 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 14:32:02,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:32:02,509 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 38 statements into 3 equivalence classes. [2025-03-17 14:32:02,516 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 38 statements. [2025-03-17 14:32:02,517 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:32:02,517 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:02,573 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2025-03-17 14:32:02,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:32:02,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325720258] [2025-03-17 14:32:02,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325720258] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:32:02,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:32:02,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 14:32:02,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852165855] [2025-03-17 14:32:02,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:32:02,574 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:32:02,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:32:02,574 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:32:02,574 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:32:02,578 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2025-03-17 14:32:02,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 55 transitions, 346 flow. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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) [2025-03-17 14:32:02,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:32:02,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2025-03-17 14:32:02,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:32:02,785 INFO L124 PetriNetUnfolderBase]: 2506/4357 cut-off events. [2025-03-17 14:32:02,785 INFO L125 PetriNetUnfolderBase]: For 5419/5419 co-relation queries the response was YES. [2025-03-17 14:32:02,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11673 conditions, 4357 events. 2506/4357 cut-off events. For 5419/5419 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 23605 event pairs, 437 based on Foata normal form. 220/4248 useless extension candidates. Maximal degree in co-relation 7042. Up to 2213 conditions per place. [2025-03-17 14:32:02,800 INFO L140 encePairwiseOnDemand]: 39/43 looper letters, 75 selfloop transitions, 4 changer transitions 3/84 dead transitions. [2025-03-17 14:32:02,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 84 transitions, 703 flow [2025-03-17 14:32:02,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:32:02,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:32:02,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 76 transitions. [2025-03-17 14:32:02,801 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2025-03-17 14:32:02,801 INFO L175 Difference]: Start difference. First operand has 59 places, 55 transitions, 346 flow. Second operand 4 states and 76 transitions. [2025-03-17 14:32:02,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 84 transitions, 703 flow [2025-03-17 14:32:02,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 84 transitions, 665 flow, removed 8 selfloop flow, removed 3 redundant places. [2025-03-17 14:32:02,806 INFO L231 Difference]: Finished difference. Result has 61 places, 56 transitions, 347 flow [2025-03-17 14:32:02,806 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=347, PETRI_PLACES=61, PETRI_TRANSITIONS=56} [2025-03-17 14:32:02,806 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 20 predicate places. [2025-03-17 14:32:02,806 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 56 transitions, 347 flow [2025-03-17 14:32:02,806 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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) [2025-03-17 14:32:02,806 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:32:02,806 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 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] [2025-03-17 14:32:02,806 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2025-03-17 14:32:02,807 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-17 14:32:02,807 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:32:02,807 INFO L85 PathProgramCache]: Analyzing trace with hash 966225899, now seen corresponding path program 1 times [2025-03-17 14:32:02,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:32:02,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707054667] [2025-03-17 14:32:02,807 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:32:02,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:32:02,812 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-03-17 14:32:02,822 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-03-17 14:32:02,823 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:32:02,823 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:03,369 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:32:03,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:32:03,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707054667] [2025-03-17 14:32:03,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707054667] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:32:03,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646033005] [2025-03-17 14:32:03,369 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:32:03,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:32:03,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:32:03,371 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:32:03,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-17 14:32:03,410 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-03-17 14:32:03,431 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-03-17 14:32:03,432 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:32:03,432 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:03,433 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-03-17 14:32:03,435 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:32:03,491 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 [2025-03-17 14:32:03,778 INFO L349 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2025-03-17 14:32:03,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 17 [2025-03-17 14:32:03,787 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:32:03,787 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:32:04,420 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 116 treesize of output 104 [2025-03-17 14:32:04,453 INFO L349 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2025-03-17 14:32:04,454 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 232 treesize of output 196 [2025-03-17 14:32:05,087 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:32:05,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646033005] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:32:05,087 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:32:05,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 29 [2025-03-17 14:32:05,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30189171] [2025-03-17 14:32:05,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:32:05,088 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-03-17 14:32:05,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:32:05,088 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-03-17 14:32:05,089 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=723, Unknown=0, NotChecked=0, Total=870 [2025-03-17 14:32:05,159 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2025-03-17 14:32:05,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 56 transitions, 347 flow. Second operand has 30 states, 30 states have (on average 12.9) internal successors, (387), 30 states have internal predecessors, (387), 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) [2025-03-17 14:32:05,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:32:05,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2025-03-17 14:32:05,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:32:09,095 INFO L124 PetriNetUnfolderBase]: 6306/11959 cut-off events. [2025-03-17 14:32:09,095 INFO L125 PetriNetUnfolderBase]: For 17500/17504 co-relation queries the response was YES. [2025-03-17 14:32:09,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32819 conditions, 11959 events. 6306/11959 cut-off events. For 17500/17504 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 84715 event pairs, 1127 based on Foata normal form. 68/11196 useless extension candidates. Maximal degree in co-relation 23990. Up to 2092 conditions per place. [2025-03-17 14:32:09,137 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 416 selfloop transitions, 128 changer transitions 97/648 dead transitions. [2025-03-17 14:32:09,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 648 transitions, 3967 flow [2025-03-17 14:32:09,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2025-03-17 14:32:09,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2025-03-17 14:32:09,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 1185 transitions. [2025-03-17 14:32:09,141 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49210963455149503 [2025-03-17 14:32:09,141 INFO L175 Difference]: Start difference. First operand has 61 places, 56 transitions, 347 flow. Second operand 56 states and 1185 transitions. [2025-03-17 14:32:09,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 648 transitions, 3967 flow [2025-03-17 14:32:09,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 648 transitions, 3961 flow, removed 2 selfloop flow, removed 1 redundant places. [2025-03-17 14:32:09,205 INFO L231 Difference]: Finished difference. Result has 139 places, 183 transitions, 1956 flow [2025-03-17 14:32:09,205 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=1956, PETRI_PLACES=139, PETRI_TRANSITIONS=183} [2025-03-17 14:32:09,206 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 98 predicate places. [2025-03-17 14:32:09,206 INFO L471 AbstractCegarLoop]: Abstraction has has 139 places, 183 transitions, 1956 flow [2025-03-17 14:32:09,207 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 12.9) internal successors, (387), 30 states have internal predecessors, (387), 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) [2025-03-17 14:32:09,207 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:32:09,207 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 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] [2025-03-17 14:32:09,213 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-17 14:32:09,407 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:32:09,407 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-17 14:32:09,408 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:32:09,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1680763759, now seen corresponding path program 2 times [2025-03-17 14:32:09,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:32:09,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313408396] [2025-03-17 14:32:09,408 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:32:09,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:32:09,413 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 38 statements into 2 equivalence classes. [2025-03-17 14:32:09,428 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 38 of 38 statements. [2025-03-17 14:32:09,428 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:32:09,428 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:10,018 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:32:10,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:32:10,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313408396] [2025-03-17 14:32:10,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313408396] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:32:10,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561370982] [2025-03-17 14:32:10,019 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:32:10,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:32:10,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:32:10,021 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:32:10,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-17 14:32:10,058 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 38 statements into 2 equivalence classes. [2025-03-17 14:32:10,077 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 38 of 38 statements. [2025-03-17 14:32:10,077 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:32:10,077 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:10,078 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 32 conjuncts are in the unsatisfiable core [2025-03-17 14:32:10,080 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:32:10,134 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 [2025-03-17 14:32:10,380 INFO L349 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2025-03-17 14:32:10,380 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 17 [2025-03-17 14:32:10,386 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:32:10,386 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:32:11,128 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 138 treesize of output 126 [2025-03-17 14:32:11,198 INFO L349 Elim1Store]: treesize reduction 10, result has 87.3 percent of original size [2025-03-17 14:32:11,199 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 241 treesize of output 248 [2025-03-17 14:32:16,388 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:32:16,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561370982] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:32:16,389 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:32:16,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 25 [2025-03-17 14:32:16,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967039731] [2025-03-17 14:32:16,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:32:16,389 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-17 14:32:16,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:32:16,390 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-17 14:32:16,390 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2025-03-17 14:32:16,443 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2025-03-17 14:32:16,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 183 transitions, 1956 flow. Second operand has 26 states, 26 states have (on average 13.461538461538462) internal successors, (350), 26 states have internal predecessors, (350), 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) [2025-03-17 14:32:16,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:32:16,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2025-03-17 14:32:16,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:32:18,691 INFO L124 PetriNetUnfolderBase]: 8498/16192 cut-off events. [2025-03-17 14:32:18,691 INFO L125 PetriNetUnfolderBase]: For 146775/146779 co-relation queries the response was YES. [2025-03-17 14:32:18,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59816 conditions, 16192 events. 8498/16192 cut-off events. For 146775/146779 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 120748 event pairs, 3359 based on Foata normal form. 29/15121 useless extension candidates. Maximal degree in co-relation 57977. Up to 7330 conditions per place. [2025-03-17 14:32:18,761 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 246 selfloop transitions, 74 changer transitions 68/395 dead transitions. [2025-03-17 14:32:18,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 395 transitions, 3998 flow [2025-03-17 14:32:18,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-03-17 14:32:18,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2025-03-17 14:32:18,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 446 transitions. [2025-03-17 14:32:18,763 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4714587737843552 [2025-03-17 14:32:18,763 INFO L175 Difference]: Start difference. First operand has 139 places, 183 transitions, 1956 flow. Second operand 22 states and 446 transitions. [2025-03-17 14:32:18,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 395 transitions, 3998 flow [2025-03-17 14:32:18,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 395 transitions, 3216 flow, removed 383 selfloop flow, removed 5 redundant places. [2025-03-17 14:32:18,868 INFO L231 Difference]: Finished difference. Result has 163 places, 216 transitions, 1978 flow [2025-03-17 14:32:18,869 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1348, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1978, PETRI_PLACES=163, PETRI_TRANSITIONS=216} [2025-03-17 14:32:18,869 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 122 predicate places. [2025-03-17 14:32:18,870 INFO L471 AbstractCegarLoop]: Abstraction has has 163 places, 216 transitions, 1978 flow [2025-03-17 14:32:18,870 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 13.461538461538462) internal successors, (350), 26 states have internal predecessors, (350), 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) [2025-03-17 14:32:18,870 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:32:18,870 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 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] [2025-03-17 14:32:18,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-17 14:32:19,070 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-03-17 14:32:19,070 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-17 14:32:19,071 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:32:19,071 INFO L85 PathProgramCache]: Analyzing trace with hash 594937975, now seen corresponding path program 3 times [2025-03-17 14:32:19,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:32:19,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64727775] [2025-03-17 14:32:19,071 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:32:19,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:32:19,076 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 38 statements into 3 equivalence classes. [2025-03-17 14:32:19,087 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 36 of 38 statements. [2025-03-17 14:32:19,088 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 14:32:19,088 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:19,248 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-17 14:32:19,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:32:19,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64727775] [2025-03-17 14:32:19,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64727775] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:32:19,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823646507] [2025-03-17 14:32:19,248 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:32:19,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:32:19,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:32:19,250 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:32:19,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-17 14:32:19,288 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 38 statements into 3 equivalence classes. [2025-03-17 14:32:19,355 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 36 of 38 statements. [2025-03-17 14:32:19,355 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 14:32:19,355 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:19,356 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-17 14:32:19,357 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:32:19,634 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-17 14:32:19,634 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:32:19,746 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 14:32:19,747 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 60 [2025-03-17 14:32:19,826 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-17 14:32:19,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823646507] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:32:19,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:32:19,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 15 [2025-03-17 14:32:19,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774416028] [2025-03-17 14:32:19,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:32:19,827 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-17 14:32:19,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:32:19,828 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-17 14:32:19,828 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2025-03-17 14:32:19,828 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2025-03-17 14:32:19,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 216 transitions, 1978 flow. Second operand has 16 states, 16 states have (on average 14.875) internal successors, (238), 16 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:19,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:32:19,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2025-03-17 14:32:19,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:32:22,173 INFO L124 PetriNetUnfolderBase]: 11698/22292 cut-off events. [2025-03-17 14:32:22,173 INFO L125 PetriNetUnfolderBase]: For 215728/215732 co-relation queries the response was YES. [2025-03-17 14:32:22,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81472 conditions, 22292 events. 11698/22292 cut-off events. For 215728/215732 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 177826 event pairs, 3151 based on Foata normal form. 93/20889 useless extension candidates. Maximal degree in co-relation 79703. Up to 10106 conditions per place. [2025-03-17 14:32:22,301 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 270 selfloop transitions, 91 changer transitions 56/424 dead transitions. [2025-03-17 14:32:22,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 424 transitions, 4340 flow [2025-03-17 14:32:22,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-17 14:32:22,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-03-17 14:32:22,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 335 transitions. [2025-03-17 14:32:22,303 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5564784053156147 [2025-03-17 14:32:22,303 INFO L175 Difference]: Start difference. First operand has 163 places, 216 transitions, 1978 flow. Second operand 14 states and 335 transitions. [2025-03-17 14:32:22,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 424 transitions, 4340 flow [2025-03-17 14:32:22,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 424 transitions, 4142 flow, removed 85 selfloop flow, removed 11 redundant places. [2025-03-17 14:32:22,560 INFO L231 Difference]: Finished difference. Result has 177 places, 266 transitions, 2850 flow [2025-03-17 14:32:22,560 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1749, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2850, PETRI_PLACES=177, PETRI_TRANSITIONS=266} [2025-03-17 14:32:22,560 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 136 predicate places. [2025-03-17 14:32:22,560 INFO L471 AbstractCegarLoop]: Abstraction has has 177 places, 266 transitions, 2850 flow [2025-03-17 14:32:22,561 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 14.875) internal successors, (238), 16 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:22,561 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:32:22,561 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:32:22,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-17 14:32:22,761 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-03-17 14:32:22,761 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-17 14:32:22,762 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:32:22,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1615674489, now seen corresponding path program 4 times [2025-03-17 14:32:22,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:32:22,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397224776] [2025-03-17 14:32:22,762 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 14:32:22,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:32:22,768 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 40 statements into 2 equivalence classes. [2025-03-17 14:32:22,777 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 40 of 40 statements. [2025-03-17 14:32:22,777 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 14:32:22,777 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:22,974 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-17 14:32:22,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:32:22,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397224776] [2025-03-17 14:32:22,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397224776] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:32:22,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601647517] [2025-03-17 14:32:22,974 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 14:32:22,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:32:22,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:32:22,976 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:32:22,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-17 14:32:23,016 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 40 statements into 2 equivalence classes. [2025-03-17 14:32:23,038 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 40 of 40 statements. [2025-03-17 14:32:23,038 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 14:32:23,039 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:23,040 INFO L256 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-03-17 14:32:23,041 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:32:23,212 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-17 14:32:23,212 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:32:23,330 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 14:32:23,330 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 60 [2025-03-17 14:32:23,397 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-17 14:32:23,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601647517] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:32:23,397 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:32:23,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6] total 17 [2025-03-17 14:32:23,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563583361] [2025-03-17 14:32:23,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:32:23,398 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-17 14:32:23,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:32:23,398 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-17 14:32:23,398 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2025-03-17 14:32:23,405 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2025-03-17 14:32:23,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 266 transitions, 2850 flow. Second operand has 18 states, 18 states have (on average 14.777777777777779) internal successors, (266), 18 states have internal predecessors, (266), 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) [2025-03-17 14:32:23,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:32:23,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2025-03-17 14:32:23,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:32:25,718 INFO L124 PetriNetUnfolderBase]: 11938/22657 cut-off events. [2025-03-17 14:32:25,718 INFO L125 PetriNetUnfolderBase]: For 229906/229910 co-relation queries the response was YES. [2025-03-17 14:32:25,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85225 conditions, 22657 events. 11938/22657 cut-off events. For 229906/229910 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 182109 event pairs, 4790 based on Foata normal form. 8/21139 useless extension candidates. Maximal degree in co-relation 83244. Up to 14214 conditions per place. [2025-03-17 14:32:26,010 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 277 selfloop transitions, 49 changer transitions 46/379 dead transitions. [2025-03-17 14:32:26,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 379 transitions, 4279 flow [2025-03-17 14:32:26,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-17 14:32:26,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-03-17 14:32:26,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 277 transitions. [2025-03-17 14:32:26,011 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49552772808586765 [2025-03-17 14:32:26,011 INFO L175 Difference]: Start difference. First operand has 177 places, 266 transitions, 2850 flow. Second operand 13 states and 277 transitions. [2025-03-17 14:32:26,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 379 transitions, 4279 flow [2025-03-17 14:32:26,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 379 transitions, 4007 flow, removed 136 selfloop flow, removed 0 redundant places. [2025-03-17 14:32:26,296 INFO L231 Difference]: Finished difference. Result has 191 places, 269 transitions, 2769 flow [2025-03-17 14:32:26,296 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2590, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2769, PETRI_PLACES=191, PETRI_TRANSITIONS=269} [2025-03-17 14:32:26,296 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 150 predicate places. [2025-03-17 14:32:26,296 INFO L471 AbstractCegarLoop]: Abstraction has has 191 places, 269 transitions, 2769 flow [2025-03-17 14:32:26,297 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 14.777777777777779) internal successors, (266), 18 states have internal predecessors, (266), 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) [2025-03-17 14:32:26,297 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:32:26,297 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:32:26,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-17 14:32:26,497 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-03-17 14:32:26,497 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-17 14:32:26,498 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:32:26,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1890807999, now seen corresponding path program 5 times [2025-03-17 14:32:26,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:32:26,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342933002] [2025-03-17 14:32:26,498 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 14:32:26,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:32:26,502 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 46 statements into 3 equivalence classes. [2025-03-17 14:32:26,509 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 46 of 46 statements. [2025-03-17 14:32:26,509 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-17 14:32:26,509 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:26,593 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:32:26,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:32:26,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342933002] [2025-03-17 14:32:26,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342933002] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:32:26,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100336318] [2025-03-17 14:32:26,593 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 14:32:26,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:32:26,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:32:26,595 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:32:26,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-17 14:32:26,635 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 46 statements into 3 equivalence classes. [2025-03-17 14:32:26,656 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 46 of 46 statements. [2025-03-17 14:32:26,656 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-17 14:32:26,656 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:26,657 INFO L256 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-17 14:32:26,658 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:32:26,751 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:32:26,751 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:32:26,845 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:32:26,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100336318] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:32:26,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:32:26,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2025-03-17 14:32:26,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733759736] [2025-03-17 14:32:26,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:32:26,846 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-17 14:32:26,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:32:26,846 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-17 14:32:26,846 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2025-03-17 14:32:26,864 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2025-03-17 14:32:26,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 269 transitions, 2769 flow. Second operand has 21 states, 21 states have (on average 12.80952380952381) internal successors, (269), 21 states have internal predecessors, (269), 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) [2025-03-17 14:32:26,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:32:26,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2025-03-17 14:32:26,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:32:28,058 INFO L124 PetriNetUnfolderBase]: 4561/8667 cut-off events. [2025-03-17 14:32:28,059 INFO L125 PetriNetUnfolderBase]: For 97586/97586 co-relation queries the response was YES. [2025-03-17 14:32:28,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34082 conditions, 8667 events. 4561/8667 cut-off events. For 97586/97586 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 58935 event pairs, 3749 based on Foata normal form. 55/8112 useless extension candidates. Maximal degree in co-relation 33774. Up to 6811 conditions per place. [2025-03-17 14:32:28,105 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 78 selfloop transitions, 8 changer transitions 60/153 dead transitions. [2025-03-17 14:32:28,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 153 transitions, 1730 flow [2025-03-17 14:32:28,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-17 14:32:28,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-17 14:32:28,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 194 transitions. [2025-03-17 14:32:28,106 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41014799154334036 [2025-03-17 14:32:28,106 INFO L175 Difference]: Start difference. First operand has 191 places, 269 transitions, 2769 flow. Second operand 11 states and 194 transitions. [2025-03-17 14:32:28,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 153 transitions, 1730 flow [2025-03-17 14:32:28,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 153 transitions, 1506 flow, removed 66 selfloop flow, removed 32 redundant places. [2025-03-17 14:32:28,191 INFO L231 Difference]: Finished difference. Result has 127 places, 93 transitions, 907 flow [2025-03-17 14:32:28,191 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1069, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=907, PETRI_PLACES=127, PETRI_TRANSITIONS=93} [2025-03-17 14:32:28,191 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 86 predicate places. [2025-03-17 14:32:28,191 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 93 transitions, 907 flow [2025-03-17 14:32:28,191 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 12.80952380952381) internal successors, (269), 21 states have internal predecessors, (269), 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) [2025-03-17 14:32:28,191 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:32:28,192 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:32:28,197 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-03-17 14:32:28,392 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:32:28,392 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-17 14:32:28,393 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:32:28,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1393970575, now seen corresponding path program 6 times [2025-03-17 14:32:28,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:32:28,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219003993] [2025-03-17 14:32:28,393 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 14:32:28,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:32:28,401 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 48 statements into 4 equivalence classes. [2025-03-17 14:32:28,419 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) and asserted 48 of 48 statements. [2025-03-17 14:32:28,420 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2025-03-17 14:32:28,420 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:29,072 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 3 proven. 43 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 14:32:29,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:32:29,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219003993] [2025-03-17 14:32:29,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219003993] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:32:29,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481016087] [2025-03-17 14:32:29,073 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 14:32:29,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:32:29,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:32:29,075 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:32:29,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-17 14:32:29,110 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 48 statements into 4 equivalence classes. [2025-03-17 14:32:29,135 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) and asserted 48 of 48 statements. [2025-03-17 14:32:29,135 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2025-03-17 14:32:29,135 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:29,136 INFO L256 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 45 conjuncts are in the unsatisfiable core [2025-03-17 14:32:29,138 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:32:29,214 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 [2025-03-17 14:32:29,628 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 2 proven. 44 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 14:32:29,628 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:32:30,443 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 171 treesize of output 153 [2025-03-17 14:32:30,495 INFO L349 Elim1Store]: treesize reduction 30, result has 64.7 percent of original size [2025-03-17 14:32:30,496 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 530 treesize of output 404 [2025-03-17 14:32:31,157 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 14:32:31,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481016087] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:32:31,158 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:32:31,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 36 [2025-03-17 14:32:31,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165159651] [2025-03-17 14:32:31,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:32:31,158 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2025-03-17 14:32:31,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:32:31,159 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2025-03-17 14:32:31,159 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=1001, Unknown=0, NotChecked=0, Total=1332 [2025-03-17 14:32:31,209 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2025-03-17 14:32:31,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 93 transitions, 907 flow. Second operand has 37 states, 37 states have (on average 13.08108108108108) internal successors, (484), 37 states have internal predecessors, (484), 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) [2025-03-17 14:32:31,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:32:31,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2025-03-17 14:32:31,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:32:37,304 INFO L124 PetriNetUnfolderBase]: 12053/22863 cut-off events. [2025-03-17 14:32:37,304 INFO L125 PetriNetUnfolderBase]: For 125125/125137 co-relation queries the response was YES. [2025-03-17 14:32:37,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79496 conditions, 22863 events. 12053/22863 cut-off events. For 125125/125137 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 180294 event pairs, 1990 based on Foata normal form. 72/21396 useless extension candidates. Maximal degree in co-relation 78605. Up to 4833 conditions per place. [2025-03-17 14:32:37,393 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 469 selfloop transitions, 249 changer transitions 205/930 dead transitions. [2025-03-17 14:32:37,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 930 transitions, 8137 flow [2025-03-17 14:32:37,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2025-03-17 14:32:37,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2025-03-17 14:32:37,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 1516 transitions. [2025-03-17 14:32:37,395 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4896640826873385 [2025-03-17 14:32:37,395 INFO L175 Difference]: Start difference. First operand has 127 places, 93 transitions, 907 flow. Second operand 72 states and 1516 transitions. [2025-03-17 14:32:37,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 930 transitions, 8137 flow [2025-03-17 14:32:37,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 930 transitions, 7357 flow, removed 375 selfloop flow, removed 13 redundant places. [2025-03-17 14:32:37,484 INFO L231 Difference]: Finished difference. Result has 208 places, 332 transitions, 4833 flow [2025-03-17 14:32:37,484 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=845, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=4833, PETRI_PLACES=208, PETRI_TRANSITIONS=332} [2025-03-17 14:32:37,485 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 167 predicate places. [2025-03-17 14:32:37,485 INFO L471 AbstractCegarLoop]: Abstraction has has 208 places, 332 transitions, 4833 flow [2025-03-17 14:32:37,485 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 13.08108108108108) internal successors, (484), 37 states have internal predecessors, (484), 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) [2025-03-17 14:32:37,485 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:32:37,485 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:32:37,490 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-03-17 14:32:37,685 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:32:37,686 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-17 14:32:37,686 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:32:37,686 INFO L85 PathProgramCache]: Analyzing trace with hash 878874083, now seen corresponding path program 7 times [2025-03-17 14:32:37,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:32:37,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325003691] [2025-03-17 14:32:37,686 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-17 14:32:37,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:32:37,692 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 48 statements into 1 equivalence classes. [2025-03-17 14:32:37,702 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 48 of 48 statements. [2025-03-17 14:32:37,702 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:32:37,703 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:38,402 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 14:32:38,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:32:38,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325003691] [2025-03-17 14:32:38,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325003691] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:32:38,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590620738] [2025-03-17 14:32:38,402 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-17 14:32:38,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:32:38,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:32:38,404 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:32:38,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-17 14:32:38,440 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 48 statements into 1 equivalence classes. [2025-03-17 14:32:38,460 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 48 of 48 statements. [2025-03-17 14:32:38,460 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:32:38,460 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:38,462 INFO L256 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 40 conjuncts are in the unsatisfiable core [2025-03-17 14:32:38,463 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:32:38,534 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 [2025-03-17 14:32:39,000 INFO L349 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2025-03-17 14:32:39,000 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 60 treesize of output 24 [2025-03-17 14:32:39,005 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 14:32:39,005 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:32:39,885 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 169 treesize of output 151 [2025-03-17 14:32:39,932 INFO L349 Elim1Store]: treesize reduction 50, result has 54.1 percent of original size [2025-03-17 14:32:39,932 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 544 treesize of output 424 [2025-03-17 14:32:42,148 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 3 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 14:32:42,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590620738] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:32:42,148 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:32:42,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 39 [2025-03-17 14:32:42,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443790820] [2025-03-17 14:32:42,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:32:42,149 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2025-03-17 14:32:42,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:32:42,149 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2025-03-17 14:32:42,150 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1325, Unknown=0, NotChecked=0, Total=1560 [2025-03-17 14:32:42,234 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2025-03-17 14:32:42,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 332 transitions, 4833 flow. Second operand has 40 states, 40 states have (on average 12.85) internal successors, (514), 40 states have internal predecessors, (514), 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) [2025-03-17 14:32:42,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:32:42,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2025-03-17 14:32:42,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:32:48,755 INFO L124 PetriNetUnfolderBase]: 16713/32075 cut-off events. [2025-03-17 14:32:48,755 INFO L125 PetriNetUnfolderBase]: For 476885/476901 co-relation queries the response was YES. [2025-03-17 14:32:48,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128440 conditions, 32075 events. 16713/32075 cut-off events. For 476885/476901 co-relation queries the response was YES. Maximal size of possible extension queue 775. Compared 272541 event pairs, 4155 based on Foata normal form. 681/30540 useless extension candidates. Maximal degree in co-relation 127338. Up to 5495 conditions per place. [2025-03-17 14:32:48,979 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 372 selfloop transitions, 354 changer transitions 173/906 dead transitions. [2025-03-17 14:32:48,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 906 transitions, 11461 flow [2025-03-17 14:32:48,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2025-03-17 14:32:48,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2025-03-17 14:32:48,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 1051 transitions. [2025-03-17 14:32:48,981 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47003577817531306 [2025-03-17 14:32:48,981 INFO L175 Difference]: Start difference. First operand has 208 places, 332 transitions, 4833 flow. Second operand 52 states and 1051 transitions. [2025-03-17 14:32:48,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 906 transitions, 11461 flow [2025-03-17 14:32:49,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 906 transitions, 9349 flow, removed 1048 selfloop flow, removed 15 redundant places. [2025-03-17 14:32:49,586 INFO L231 Difference]: Finished difference. Result has 257 places, 498 transitions, 7515 flow [2025-03-17 14:32:49,586 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2630, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=7515, PETRI_PLACES=257, PETRI_TRANSITIONS=498} [2025-03-17 14:32:49,586 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 216 predicate places. [2025-03-17 14:32:49,587 INFO L471 AbstractCegarLoop]: Abstraction has has 257 places, 498 transitions, 7515 flow [2025-03-17 14:32:49,587 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 12.85) internal successors, (514), 40 states have internal predecessors, (514), 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) [2025-03-17 14:32:49,587 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:32:49,587 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:32:49,593 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-03-17 14:32:49,791 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2025-03-17 14:32:49,791 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-17 14:32:49,791 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:32:49,791 INFO L85 PathProgramCache]: Analyzing trace with hash -598555805, now seen corresponding path program 8 times [2025-03-17 14:32:49,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:32:49,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121744216] [2025-03-17 14:32:49,791 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:32:49,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:32:49,796 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 48 statements into 2 equivalence classes. [2025-03-17 14:32:49,806 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 48 of 48 statements. [2025-03-17 14:32:49,807 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:32:49,807 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:50,519 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 14:32:50,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:32:50,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121744216] [2025-03-17 14:32:50,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121744216] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:32:50,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149986370] [2025-03-17 14:32:50,519 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:32:50,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:32:50,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:32:50,521 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:32:50,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-17 14:32:50,561 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 48 statements into 2 equivalence classes. [2025-03-17 14:32:50,582 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 48 of 48 statements. [2025-03-17 14:32:50,582 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:32:50,582 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:50,583 INFO L256 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 39 conjuncts are in the unsatisfiable core [2025-03-17 14:32:50,584 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:32:51,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-17 14:32:51,185 INFO L173 IndexEqualityManager]: detected equality via solver [2025-03-17 14:32:51,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-17 14:32:51,188 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 14:32:51,191 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 6 case distinctions, treesize of input 43 treesize of output 18 [2025-03-17 14:32:51,197 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 14:32:51,197 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:32:51,904 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 14:32:51,904 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 135 treesize of output 215 [2025-03-17 14:32:54,353 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 1 proven. 39 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 14:32:54,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149986370] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:32:54,354 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:32:54,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 35 [2025-03-17 14:32:54,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895021166] [2025-03-17 14:32:54,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:32:54,354 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2025-03-17 14:32:54,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:32:54,354 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2025-03-17 14:32:54,355 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1058, Unknown=0, NotChecked=0, Total=1260 [2025-03-17 14:32:54,412 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2025-03-17 14:32:54,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 498 transitions, 7515 flow. Second operand has 36 states, 36 states have (on average 13.11111111111111) internal successors, (472), 36 states have internal predecessors, (472), 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) [2025-03-17 14:32:54,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:32:54,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2025-03-17 14:32:54,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:33:07,162 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-03-17 14:33:08,248 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-03-17 14:33:16,573 INFO L124 PetriNetUnfolderBase]: 32355/62692 cut-off events. [2025-03-17 14:33:16,573 INFO L125 PetriNetUnfolderBase]: For 743696/743704 co-relation queries the response was YES. [2025-03-17 14:33:17,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 242768 conditions, 62692 events. 32355/62692 cut-off events. For 743696/743704 co-relation queries the response was YES. Maximal size of possible extension queue 1250. Compared 583495 event pairs, 9092 based on Foata normal form. 368/58756 useless extension candidates. Maximal degree in co-relation 239576. Up to 10720 conditions per place. [2025-03-17 14:33:17,317 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 604 selfloop transitions, 269 changer transitions 801/1681 dead transitions. [2025-03-17 14:33:17,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 1681 transitions, 26395 flow [2025-03-17 14:33:17,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2025-03-17 14:33:17,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2025-03-17 14:33:17,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 1461 transitions. [2025-03-17 14:33:17,319 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5071155848663659 [2025-03-17 14:33:17,319 INFO L175 Difference]: Start difference. First operand has 257 places, 498 transitions, 7515 flow. Second operand 67 states and 1461 transitions. [2025-03-17 14:33:17,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 1681 transitions, 26395 flow [2025-03-17 14:33:19,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 1681 transitions, 19326 flow, removed 3521 selfloop flow, removed 9 redundant places.