./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/test-context1.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/test-context1.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 d63a80d2bfe8ff8bb62e6b5083cee589f2cb0f37dc67867654ab7601d82af23e --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-17 14:33:08,646 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-17 14:33:08,696 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-03-17 14:33:08,699 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-17 14:33:08,700 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-17 14:33:08,722 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-17 14:33:08,724 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-17 14:33:08,724 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-17 14:33:08,724 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-17 14:33:08,724 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-17 14:33:08,725 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-17 14:33:08,725 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-17 14:33:08,725 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-17 14:33:08,725 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-17 14:33:08,726 INFO L153 SettingsManager]: * Use SBE=true [2025-03-17 14:33:08,726 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-17 14:33:08,726 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-17 14:33:08,726 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-17 14:33:08,726 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-17 14:33:08,726 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-17 14:33:08,727 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-17 14:33:08,727 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-17 14:33:08,727 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-17 14:33:08,727 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-17 14:33:08,727 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-17 14:33:08,727 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-17 14:33:08,727 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-17 14:33:08,727 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-17 14:33:08,727 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-17 14:33:08,727 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-17 14:33:08,728 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-17 14:33:08,728 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-17 14:33:08,728 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-17 14:33:08,728 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 14:33:08,728 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-17 14:33:08,728 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-17 14:33:08,728 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-17 14:33:08,728 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-17 14:33:08,728 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-17 14:33:08,728 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-17 14:33:08,728 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-17 14:33:08,729 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-17 14:33:08,729 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 -> d63a80d2bfe8ff8bb62e6b5083cee589f2cb0f37dc67867654ab7601d82af23e [2025-03-17 14:33:08,929 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-17 14:33:08,936 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-17 14:33:08,939 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-17 14:33:08,941 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-17 14:33:08,941 INFO L274 PluginConnector]: CDTParser initialized [2025-03-17 14:33:08,942 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/test-context1.wvr.c [2025-03-17 14:33:10,086 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/917eb6ab4/0812cc6b5ed1476cad97196ae8557056/FLAG79dde9a53 [2025-03-17 14:33:10,286 INFO L384 CDTParser]: Found 1 translation units. [2025-03-17 14:33:10,287 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/test-context1.wvr.c [2025-03-17 14:33:10,293 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/917eb6ab4/0812cc6b5ed1476cad97196ae8557056/FLAG79dde9a53 [2025-03-17 14:33:10,307 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/917eb6ab4/0812cc6b5ed1476cad97196ae8557056 [2025-03-17 14:33:10,309 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-17 14:33:10,310 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-17 14:33:10,311 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-17 14:33:10,311 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-17 14:33:10,313 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-17 14:33:10,314 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 02:33:10" (1/1) ... [2025-03-17 14:33:10,315 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e1f2539 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:33:10, skipping insertion in model container [2025-03-17 14:33:10,315 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 02:33:10" (1/1) ... [2025-03-17 14:33:10,325 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-17 14:33:10,452 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 14:33:10,456 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 14:33:10,465 INFO L200 MainTranslator]: Completed pre-run [2025-03-17 14:33:10,484 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 14:33:10,498 INFO L204 MainTranslator]: Completed translation [2025-03-17 14:33:10,498 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:33:10 WrapperNode [2025-03-17 14:33:10,498 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-17 14:33:10,500 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-17 14:33:10,500 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-17 14:33:10,500 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-17 14:33:10,504 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:33:10" (1/1) ... [2025-03-17 14:33:10,514 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:33:10" (1/1) ... [2025-03-17 14:33:10,534 INFO L138 Inliner]: procedures = 23, calls = 25, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 124 [2025-03-17 14:33:10,535 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-17 14:33:10,536 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-17 14:33:10,536 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-17 14:33:10,536 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-17 14:33:10,543 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:33:10" (1/1) ... [2025-03-17 14:33:10,543 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:33:10" (1/1) ... [2025-03-17 14:33:10,545 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:33:10" (1/1) ... [2025-03-17 14:33:10,559 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 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 14:33:10,560 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:33:10" (1/1) ... [2025-03-17 14:33:10,560 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:33:10" (1/1) ... [2025-03-17 14:33:10,567 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:33:10" (1/1) ... [2025-03-17 14:33:10,572 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:33:10" (1/1) ... [2025-03-17 14:33:10,573 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:33:10" (1/1) ... [2025-03-17 14:33:10,574 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:33:10" (1/1) ... [2025-03-17 14:33:10,575 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-17 14:33:10,578 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-17 14:33:10,579 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-17 14:33:10,579 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-17 14:33:10,580 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:33:10" (1/1) ... [2025-03-17 14:33:10,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 14:33:10,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:33:10,606 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 14:33:10,609 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 14:33:10,628 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-17 14:33:10,628 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-17 14:33:10,628 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-17 14:33:10,628 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-17 14:33:10,628 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-17 14:33:10,628 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-17 14:33:10,628 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-17 14:33:10,628 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-17 14:33:10,628 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-17 14:33:10,628 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-03-17 14:33:10,629 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-03-17 14:33:10,629 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-17 14:33:10,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-17 14:33:10,629 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-17 14:33:10,629 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-17 14:33:10,629 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-17 14:33:10,630 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 14:33:10,697 INFO L256 CfgBuilder]: Building ICFG [2025-03-17 14:33:10,699 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-17 14:33:10,927 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-17 14:33:10,928 INFO L307 CfgBuilder]: Performing block encoding [2025-03-17 14:33:11,076 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-17 14:33:11,078 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-17 14:33:11,078 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 02:33:11 BoogieIcfgContainer [2025-03-17 14:33:11,078 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-17 14:33:11,081 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-17 14:33:11,081 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-17 14:33:11,084 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-17 14:33:11,084 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 02:33:10" (1/3) ... [2025-03-17 14:33:11,085 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17eec71a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 02:33:11, skipping insertion in model container [2025-03-17 14:33:11,086 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:33:10" (2/3) ... [2025-03-17 14:33:11,086 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17eec71a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 02:33:11, skipping insertion in model container [2025-03-17 14:33:11,086 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 02:33:11" (3/3) ... [2025-03-17 14:33:11,087 INFO L128 eAbstractionObserver]: Analyzing ICFG test-context1.wvr.c [2025-03-17 14:33:11,098 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-17 14:33:11,099 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG test-context1.wvr.c that has 3 procedures, 33 locations, 1 initial locations, 3 loop locations, and 8 error locations. [2025-03-17 14:33:11,100 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-17 14:33:11,150 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-03-17 14:33:11,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 37 transitions, 88 flow [2025-03-17 14:33:11,198 INFO L124 PetriNetUnfolderBase]: 5/35 cut-off events. [2025-03-17 14:33:11,200 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-17 14:33:11,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44 conditions, 35 events. 5/35 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 54 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 23. Up to 2 conditions per place. [2025-03-17 14:33:11,203 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 37 transitions, 88 flow [2025-03-17 14:33:11,206 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 36 places, 34 transitions, 80 flow [2025-03-17 14:33:11,213 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-17 14:33:11,223 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;@71d2268f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-17 14:33:11,223 INFO L334 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2025-03-17 14:33:11,225 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-17 14:33:11,225 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-03-17 14:33:11,226 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-17 14:33:11,226 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:33:11,226 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-17 14:33:11,226 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-17 14:33:11,230 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:33:11,231 INFO L85 PathProgramCache]: Analyzing trace with hash 356528, now seen corresponding path program 1 times [2025-03-17 14:33:11,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:33:11,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346129100] [2025-03-17 14:33:11,237 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:33:11,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:33:11,291 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-17 14:33:11,310 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-17 14:33:11,310 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:33:11,311 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:33:11,453 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 14:33:11,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:33:11,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346129100] [2025-03-17 14:33:11,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346129100] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:33:11,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:33:11,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-03-17 14:33:11,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543405476] [2025-03-17 14:33:11,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:33:11,461 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 14:33:11,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:33:11,480 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 14:33:11,481 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 14:33:11,489 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2025-03-17 14:33:11,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 34 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 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 14:33:11,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:33:11,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2025-03-17 14:33:11,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:33:11,624 INFO L124 PetriNetUnfolderBase]: 212/371 cut-off events. [2025-03-17 14:33:11,625 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2025-03-17 14:33:11,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 768 conditions, 371 events. 212/371 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1452 event pairs, 176 based on Foata normal form. 1/263 useless extension candidates. Maximal degree in co-relation 705. Up to 364 conditions per place. [2025-03-17 14:33:11,632 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 23 selfloop transitions, 2 changer transitions 0/29 dead transitions. [2025-03-17 14:33:11,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 29 transitions, 120 flow [2025-03-17 14:33:11,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 14:33:11,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 14:33:11,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 50 transitions. [2025-03-17 14:33:11,644 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45045045045045046 [2025-03-17 14:33:11,646 INFO L175 Difference]: Start difference. First operand has 36 places, 34 transitions, 80 flow. Second operand 3 states and 50 transitions. [2025-03-17 14:33:11,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 29 transitions, 120 flow [2025-03-17 14:33:11,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 29 transitions, 112 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-17 14:33:11,651 INFO L231 Difference]: Finished difference. Result has 31 places, 29 transitions, 66 flow [2025-03-17 14:33:11,653 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=31, PETRI_TRANSITIONS=29} [2025-03-17 14:33:11,656 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, -5 predicate places. [2025-03-17 14:33:11,658 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 29 transitions, 66 flow [2025-03-17 14:33:11,658 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 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 14:33:11,658 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:33:11,658 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-17 14:33:11,658 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-17 14:33:11,659 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-17 14:33:11,659 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:33:11,660 INFO L85 PathProgramCache]: Analyzing trace with hash 356529, now seen corresponding path program 1 times [2025-03-17 14:33:11,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:33:11,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979989132] [2025-03-17 14:33:11,660 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:33:11,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:33:11,667 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-17 14:33:11,690 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-17 14:33:11,691 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:33:11,692 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:33:11,891 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 14:33:11,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:33:11,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979989132] [2025-03-17 14:33:11,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979989132] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:33:11,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:33:11,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 14:33:11,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164529193] [2025-03-17 14:33:11,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:33:11,893 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:33:11,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:33:11,894 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:33:11,894 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:33:11,901 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2025-03-17 14:33:11,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 29 transitions, 66 flow. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 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 14:33:11,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:33:11,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2025-03-17 14:33:11,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:33:12,033 INFO L124 PetriNetUnfolderBase]: 213/374 cut-off events. [2025-03-17 14:33:12,034 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2025-03-17 14:33:12,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 759 conditions, 374 events. 213/374 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1455 event pairs, 176 based on Foata normal form. 0/265 useless extension candidates. Maximal degree in co-relation 737. Up to 369 conditions per place. [2025-03-17 14:33:12,038 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 25 selfloop transitions, 4 changer transitions 0/32 dead transitions. [2025-03-17 14:33:12,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 32 transitions, 132 flow [2025-03-17 14:33:12,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:33:12,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:33:12,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 58 transitions. [2025-03-17 14:33:12,040 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3918918918918919 [2025-03-17 14:33:12,040 INFO L175 Difference]: Start difference. First operand has 31 places, 29 transitions, 66 flow. Second operand 4 states and 58 transitions. [2025-03-17 14:33:12,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 32 transitions, 132 flow [2025-03-17 14:33:12,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 32 transitions, 126 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:33:12,042 INFO L231 Difference]: Finished difference. Result has 34 places, 32 transitions, 89 flow [2025-03-17 14:33:12,043 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=89, PETRI_PLACES=34, PETRI_TRANSITIONS=32} [2025-03-17 14:33:12,044 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, -2 predicate places. [2025-03-17 14:33:12,044 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 32 transitions, 89 flow [2025-03-17 14:33:12,044 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 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 14:33:12,044 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:33:12,044 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2025-03-17 14:33:12,045 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-17 14:33:12,045 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-17 14:33:12,045 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:33:12,046 INFO L85 PathProgramCache]: Analyzing trace with hash 342635899, now seen corresponding path program 1 times [2025-03-17 14:33:12,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:33:12,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849579554] [2025-03-17 14:33:12,047 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:33:12,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:33:12,053 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-03-17 14:33:12,062 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-03-17 14:33:12,063 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:33:12,063 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:33:12,314 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 14:33:12,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:33:12,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849579554] [2025-03-17 14:33:12,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849579554] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:33:12,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377644688] [2025-03-17 14:33:12,315 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:33:12,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:33:12,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:33:12,317 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 14:33:12,320 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 14:33:12,357 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-03-17 14:33:12,366 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-03-17 14:33:12,366 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:33:12,366 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:33:12,368 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-17 14:33:12,371 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:33:12,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2025-03-17 14:33:12,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:33:12,594 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:33:12,710 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 14:33:12,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377644688] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:33:12,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:33:12,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2025-03-17 14:33:12,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355920361] [2025-03-17 14:33:12,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:33:12,712 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-17 14:33:12,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:33:12,712 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-17 14:33:12,712 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2025-03-17 14:33:12,734 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2025-03-17 14:33:12,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 32 transitions, 89 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 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 14:33:12,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:33:12,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2025-03-17 14:33:12,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:33:12,950 INFO L124 PetriNetUnfolderBase]: 213/373 cut-off events. [2025-03-17 14:33:12,950 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2025-03-17 14:33:12,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 766 conditions, 373 events. 213/373 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1465 event pairs, 176 based on Foata normal form. 0/264 useless extension candidates. Maximal degree in co-relation 744. Up to 365 conditions per place. [2025-03-17 14:33:12,953 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 21 selfloop transitions, 7 changer transitions 0/31 dead transitions. [2025-03-17 14:33:12,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 31 transitions, 141 flow [2025-03-17 14:33:12,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 14:33:12,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 14:33:12,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 71 transitions. [2025-03-17 14:33:12,954 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.31981981981981983 [2025-03-17 14:33:12,954 INFO L175 Difference]: Start difference. First operand has 34 places, 32 transitions, 89 flow. Second operand 6 states and 71 transitions. [2025-03-17 14:33:12,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 31 transitions, 141 flow [2025-03-17 14:33:12,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 31 transitions, 138 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 14:33:12,955 INFO L231 Difference]: Finished difference. Result has 37 places, 31 transitions, 96 flow [2025-03-17 14:33:12,955 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=96, PETRI_PLACES=37, PETRI_TRANSITIONS=31} [2025-03-17 14:33:12,956 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 1 predicate places. [2025-03-17 14:33:12,956 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 31 transitions, 96 flow [2025-03-17 14:33:12,956 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 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 14:33:12,956 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:33:12,956 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:33:12,963 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 14:33:13,157 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 14:33:13,157 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-17 14:33:13,157 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:33:13,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1362357239, now seen corresponding path program 1 times [2025-03-17 14:33:13,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:33:13,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520024689] [2025-03-17 14:33:13,157 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:33:13,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:33:13,162 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-17 14:33:13,164 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-17 14:33:13,164 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:33:13,164 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:33:13,212 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 14:33:13,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:33:13,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520024689] [2025-03-17 14:33:13,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520024689] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:33:13,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:33:13,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 14:33:13,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368059263] [2025-03-17 14:33:13,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:33:13,213 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:33:13,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:33:13,214 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:33:13,214 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:33:13,218 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2025-03-17 14:33:13,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 31 transitions, 96 flow. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 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 14:33:13,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:33:13,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2025-03-17 14:33:13,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:33:13,269 INFO L124 PetriNetUnfolderBase]: 165/292 cut-off events. [2025-03-17 14:33:13,269 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2025-03-17 14:33:13,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 608 conditions, 292 events. 165/292 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1056 event pairs, 132 based on Foata normal form. 0/226 useless extension candidates. Maximal degree in co-relation 582. Up to 283 conditions per place. [2025-03-17 14:33:13,272 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 23 selfloop transitions, 3 changer transitions 0/29 dead transitions. [2025-03-17 14:33:13,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 29 transitions, 144 flow [2025-03-17 14:33:13,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:33:13,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:33:13,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 53 transitions. [2025-03-17 14:33:13,273 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3581081081081081 [2025-03-17 14:33:13,274 INFO L175 Difference]: Start difference. First operand has 37 places, 31 transitions, 96 flow. Second operand 4 states and 53 transitions. [2025-03-17 14:33:13,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 29 transitions, 144 flow [2025-03-17 14:33:13,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 29 transitions, 114 flow, removed 3 selfloop flow, removed 7 redundant places. [2025-03-17 14:33:13,274 INFO L231 Difference]: Finished difference. Result has 31 places, 29 transitions, 68 flow [2025-03-17 14:33:13,274 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=68, PETRI_PLACES=31, PETRI_TRANSITIONS=29} [2025-03-17 14:33:13,275 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, -5 predicate places. [2025-03-17 14:33:13,275 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 29 transitions, 68 flow [2025-03-17 14:33:13,275 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 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 14:33:13,275 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:33:13,275 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:33:13,275 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-17 14:33:13,275 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-17 14:33:13,276 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:33:13,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1362357238, now seen corresponding path program 1 times [2025-03-17 14:33:13,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:33:13,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240663140] [2025-03-17 14:33:13,276 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:33:13,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:33:13,282 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-17 14:33:13,287 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-17 14:33:13,288 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:33:13,288 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:33:13,385 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 14:33:13,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:33:13,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240663140] [2025-03-17 14:33:13,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240663140] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:33:13,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:33:13,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 14:33:13,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475521442] [2025-03-17 14:33:13,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:33:13,387 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:33:13,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:33:13,388 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:33:13,388 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:33:13,392 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2025-03-17 14:33:13,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 29 transitions, 68 flow. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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 14:33:13,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:33:13,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2025-03-17 14:33:13,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:33:13,473 INFO L124 PetriNetUnfolderBase]: 232/431 cut-off events. [2025-03-17 14:33:13,473 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2025-03-17 14:33:13,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 874 conditions, 431 events. 232/431 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1790 event pairs, 200 based on Foata normal form. 23/366 useless extension candidates. Maximal degree in co-relation 574. Up to 286 conditions per place. [2025-03-17 14:33:13,474 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 36 selfloop transitions, 3 changer transitions 2/44 dead transitions. [2025-03-17 14:33:13,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 44 transitions, 184 flow [2025-03-17 14:33:13,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:33:13,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:33:13,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 77 transitions. [2025-03-17 14:33:13,475 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5202702702702703 [2025-03-17 14:33:13,476 INFO L175 Difference]: Start difference. First operand has 31 places, 29 transitions, 68 flow. Second operand 4 states and 77 transitions. [2025-03-17 14:33:13,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 44 transitions, 184 flow [2025-03-17 14:33:13,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 44 transitions, 180 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:33:13,477 INFO L231 Difference]: Finished difference. Result has 33 places, 29 transitions, 79 flow [2025-03-17 14:33:13,477 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=79, PETRI_PLACES=33, PETRI_TRANSITIONS=29} [2025-03-17 14:33:13,477 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, -3 predicate places. [2025-03-17 14:33:13,477 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 29 transitions, 79 flow [2025-03-17 14:33:13,477 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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 14:33:13,477 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:33:13,478 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:33:13,478 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-17 14:33:13,478 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-17 14:33:13,478 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:33:13,478 INFO L85 PathProgramCache]: Analyzing trace with hash -179346476, now seen corresponding path program 1 times [2025-03-17 14:33:13,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:33:13,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458374952] [2025-03-17 14:33:13,478 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:33:13,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:33:13,482 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-17 14:33:13,486 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-17 14:33:13,486 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:33:13,487 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:33:13,635 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 14:33:13,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:33:13,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458374952] [2025-03-17 14:33:13,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458374952] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:33:13,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117222217] [2025-03-17 14:33:13,635 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:33:13,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:33:13,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:33:13,637 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 14:33:13,638 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 14:33:13,669 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-17 14:33:13,678 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-17 14:33:13,679 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:33:13,679 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:33:13,680 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-17 14:33:13,681 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:33:13,785 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 14:33:13,786 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:33:13,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2025-03-17 14:33:13,860 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 14:33:13,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117222217] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:33:13,860 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:33:13,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2025-03-17 14:33:13,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424629629] [2025-03-17 14:33:13,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:33:13,860 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-17 14:33:13,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:33:13,861 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-17 14:33:13,861 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2025-03-17 14:33:13,887 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2025-03-17 14:33:13,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 29 transitions, 79 flow. Second operand has 11 states, 11 states have (on average 10.181818181818182) internal successors, (112), 11 states have internal predecessors, (112), 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 14:33:13,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:33:13,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2025-03-17 14:33:13,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:33:14,103 INFO L124 PetriNetUnfolderBase]: 289/543 cut-off events. [2025-03-17 14:33:14,103 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2025-03-17 14:33:14,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1172 conditions, 543 events. 289/543 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2298 event pairs, 248 based on Foata normal form. 11/442 useless extension candidates. Maximal degree in co-relation 876. Up to 392 conditions per place. [2025-03-17 14:33:14,107 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 37 selfloop transitions, 5 changer transitions 0/45 dead transitions. [2025-03-17 14:33:14,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 45 transitions, 201 flow [2025-03-17 14:33:14,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:33:14,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:33:14,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 85 transitions. [2025-03-17 14:33:14,109 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4594594594594595 [2025-03-17 14:33:14,109 INFO L175 Difference]: Start difference. First operand has 33 places, 29 transitions, 79 flow. Second operand 5 states and 85 transitions. [2025-03-17 14:33:14,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 45 transitions, 201 flow [2025-03-17 14:33:14,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 45 transitions, 196 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:33:14,111 INFO L231 Difference]: Finished difference. Result has 36 places, 30 transitions, 98 flow [2025-03-17 14:33:14,112 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=98, PETRI_PLACES=36, PETRI_TRANSITIONS=30} [2025-03-17 14:33:14,112 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 0 predicate places. [2025-03-17 14:33:14,113 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 30 transitions, 98 flow [2025-03-17 14:33:14,113 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.181818181818182) internal successors, (112), 11 states have internal predecessors, (112), 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 14:33:14,113 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:33:14,113 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:33:14,119 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-17 14:33:14,315 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,SelfDestructingSolverStorable5 [2025-03-17 14:33:14,316 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-17 14:33:14,316 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:33:14,316 INFO L85 PathProgramCache]: Analyzing trace with hash 28821158, now seen corresponding path program 1 times [2025-03-17 14:33:14,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:33:14,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919839993] [2025-03-17 14:33:14,316 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:33:14,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:33:14,325 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-17 14:33:14,332 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-17 14:33:14,332 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:33:14,332 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:33:14,437 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:33:14,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:33:14,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919839993] [2025-03-17 14:33:14,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919839993] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:33:14,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823194455] [2025-03-17 14:33:14,438 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:33:14,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:33:14,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:33:14,440 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 14:33:14,442 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 14:33:14,476 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-17 14:33:14,488 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-17 14:33:14,488 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:33:14,488 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:33:14,489 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-17 14:33:14,490 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:33:14,580 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:33:14,580 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:33:14,681 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:33:14,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823194455] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:33:14,681 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:33:14,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2025-03-17 14:33:14,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689232234] [2025-03-17 14:33:14,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:33:14,682 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-17 14:33:14,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:33:14,682 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-17 14:33:14,682 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2025-03-17 14:33:14,697 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2025-03-17 14:33:14,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 30 transitions, 98 flow. Second operand has 14 states, 14 states have (on average 10.357142857142858) internal successors, (145), 14 states have internal predecessors, (145), 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 14:33:14,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:33:14,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2025-03-17 14:33:14,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:33:14,970 INFO L124 PetriNetUnfolderBase]: 547/1012 cut-off events. [2025-03-17 14:33:14,970 INFO L125 PetriNetUnfolderBase]: For 188/188 co-relation queries the response was YES. [2025-03-17 14:33:14,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2328 conditions, 1012 events. 547/1012 cut-off events. For 188/188 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 4922 event pairs, 341 based on Foata normal form. 24/837 useless extension candidates. Maximal degree in co-relation 1051. Up to 401 conditions per place. [2025-03-17 14:33:14,974 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 79 selfloop transitions, 10 changer transitions 2/94 dead transitions. [2025-03-17 14:33:14,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 94 transitions, 446 flow [2025-03-17 14:33:14,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 14:33:14,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 14:33:14,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2025-03-17 14:33:14,976 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4984984984984985 [2025-03-17 14:33:14,976 INFO L175 Difference]: Start difference. First operand has 36 places, 30 transitions, 98 flow. Second operand 9 states and 166 transitions. [2025-03-17 14:33:14,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 94 transitions, 446 flow [2025-03-17 14:33:14,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 94 transitions, 432 flow, removed 2 selfloop flow, removed 3 redundant places. [2025-03-17 14:33:14,978 INFO L231 Difference]: Finished difference. Result has 46 places, 36 transitions, 165 flow [2025-03-17 14:33:14,978 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=165, PETRI_PLACES=46, PETRI_TRANSITIONS=36} [2025-03-17 14:33:14,978 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 10 predicate places. [2025-03-17 14:33:14,978 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 36 transitions, 165 flow [2025-03-17 14:33:14,978 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 10.357142857142858) internal successors, (145), 14 states have internal predecessors, (145), 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 14:33:14,979 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:33:14,979 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2025-03-17 14:33:14,985 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-17 14:33:15,183 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:33:15,183 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-17 14:33:15,184 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:33:15,184 INFO L85 PathProgramCache]: Analyzing trace with hash 2090911004, now seen corresponding path program 2 times [2025-03-17 14:33:15,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:33:15,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130285135] [2025-03-17 14:33:15,184 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:33:15,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:33:15,189 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 14 statements into 2 equivalence classes. [2025-03-17 14:33:15,195 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-03-17 14:33:15,196 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:33:15,196 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:33:15,333 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-17 14:33:15,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:33:15,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130285135] [2025-03-17 14:33:15,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130285135] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:33:15,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120244192] [2025-03-17 14:33:15,334 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:33:15,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:33:15,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:33:15,336 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 14:33:15,337 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 14:33:15,369 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 14 statements into 2 equivalence classes. [2025-03-17 14:33:15,381 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-03-17 14:33:15,381 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:33:15,381 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:33:15,382 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-17 14:33:15,383 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:33:15,391 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 14:33:15,509 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:33:15,510 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:33:15,637 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:33:15,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120244192] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:33:15,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:33:15,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5, 5] total 13 [2025-03-17 14:33:15,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944866473] [2025-03-17 14:33:15,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:33:15,638 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-17 14:33:15,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:33:15,638 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-17 14:33:15,638 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2025-03-17 14:33:15,679 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2025-03-17 14:33:15,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 36 transitions, 165 flow. Second operand has 15 states, 15 states have (on average 9.4) internal successors, (141), 15 states have internal predecessors, (141), 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 14:33:15,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:33:15,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2025-03-17 14:33:15,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:33:16,090 INFO L124 PetriNetUnfolderBase]: 648/1201 cut-off events. [2025-03-17 14:33:16,090 INFO L125 PetriNetUnfolderBase]: For 886/886 co-relation queries the response was YES. [2025-03-17 14:33:16,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2824 conditions, 1201 events. 648/1201 cut-off events. For 886/886 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 5980 event pairs, 430 based on Foata normal form. 55/1063 useless extension candidates. Maximal degree in co-relation 1878. Up to 755 conditions per place. [2025-03-17 14:33:16,099 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 65 selfloop transitions, 10 changer transitions 0/78 dead transitions. [2025-03-17 14:33:16,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 78 transitions, 414 flow [2025-03-17 14:33:16,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 14:33:16,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 14:33:16,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2025-03-17 14:33:16,101 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4264264264264264 [2025-03-17 14:33:16,101 INFO L175 Difference]: Start difference. First operand has 46 places, 36 transitions, 165 flow. Second operand 9 states and 142 transitions. [2025-03-17 14:33:16,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 78 transitions, 414 flow [2025-03-17 14:33:16,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 78 transitions, 407 flow, removed 2 selfloop flow, removed 1 redundant places. [2025-03-17 14:33:16,103 INFO L231 Difference]: Finished difference. Result has 52 places, 36 transitions, 185 flow [2025-03-17 14:33:16,103 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=185, PETRI_PLACES=52, PETRI_TRANSITIONS=36} [2025-03-17 14:33:16,104 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 16 predicate places. [2025-03-17 14:33:16,104 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 36 transitions, 185 flow [2025-03-17 14:33:16,104 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 9.4) internal successors, (141), 15 states have internal predecessors, (141), 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 14:33:16,104 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:33:16,104 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 14:33:16,112 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 14:33:16,308 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:33:16,308 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-17 14:33:16,308 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:33:16,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1623856415, now seen corresponding path program 1 times [2025-03-17 14:33:16,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:33:16,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687371360] [2025-03-17 14:33:16,309 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:33:16,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:33:16,313 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-17 14:33:16,316 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-17 14:33:16,316 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:33:16,316 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:33:16,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:33:16,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:33:16,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687371360] [2025-03-17 14:33:16,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687371360] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:33:16,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:33:16,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 14:33:16,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18664359] [2025-03-17 14:33:16,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:33:16,336 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 14:33:16,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:33:16,337 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 14:33:16,337 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 14:33:16,337 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2025-03-17 14:33:16,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 36 transitions, 185 flow. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 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 14:33:16,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:33:16,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2025-03-17 14:33:16,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:33:16,456 INFO L124 PetriNetUnfolderBase]: 717/1305 cut-off events. [2025-03-17 14:33:16,456 INFO L125 PetriNetUnfolderBase]: For 1092/1092 co-relation queries the response was YES. [2025-03-17 14:33:16,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3223 conditions, 1305 events. 717/1305 cut-off events. For 1092/1092 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 6444 event pairs, 441 based on Foata normal form. 6/1098 useless extension candidates. Maximal degree in co-relation 1946. Up to 859 conditions per place. [2025-03-17 14:33:16,461 INFO L140 encePairwiseOnDemand]: 34/37 looper letters, 38 selfloop transitions, 4 changer transitions 4/49 dead transitions. [2025-03-17 14:33:16,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 49 transitions, 323 flow [2025-03-17 14:33:16,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 14:33:16,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 14:33:16,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 59 transitions. [2025-03-17 14:33:16,462 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5315315315315315 [2025-03-17 14:33:16,462 INFO L175 Difference]: Start difference. First operand has 52 places, 36 transitions, 185 flow. Second operand 3 states and 59 transitions. [2025-03-17 14:33:16,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 49 transitions, 323 flow [2025-03-17 14:33:16,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 49 transitions, 287 flow, removed 10 selfloop flow, removed 6 redundant places. [2025-03-17 14:33:16,464 INFO L231 Difference]: Finished difference. Result has 49 places, 36 transitions, 168 flow [2025-03-17 14:33:16,465 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=49, PETRI_TRANSITIONS=36} [2025-03-17 14:33:16,465 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 13 predicate places. [2025-03-17 14:33:16,465 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 36 transitions, 168 flow [2025-03-17 14:33:16,465 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 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 14:33:16,465 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:33:16,465 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] [2025-03-17 14:33:16,465 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-03-17 14:33:16,466 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-17 14:33:16,466 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:33:16,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1040803296, now seen corresponding path program 1 times [2025-03-17 14:33:16,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:33:16,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003383550] [2025-03-17 14:33:16,466 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:33:16,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:33:16,471 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-03-17 14:33:16,477 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-03-17 14:33:16,477 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:33:16,477 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:33:16,639 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 14:33:16,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:33:16,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003383550] [2025-03-17 14:33:16,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003383550] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:33:16,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:33:16,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-17 14:33:16,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977293225] [2025-03-17 14:33:16,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:33:16,640 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 14:33:16,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:33:16,640 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 14:33:16,640 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-17 14:33:16,649 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2025-03-17 14:33:16,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 36 transitions, 168 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 14:33:16,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:33:16,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2025-03-17 14:33:16,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:33:16,820 INFO L124 PetriNetUnfolderBase]: 879/1565 cut-off events. [2025-03-17 14:33:16,820 INFO L125 PetriNetUnfolderBase]: For 1542/1542 co-relation queries the response was YES. [2025-03-17 14:33:16,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3971 conditions, 1565 events. 879/1565 cut-off events. For 1542/1542 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 7477 event pairs, 136 based on Foata normal form. 3/1319 useless extension candidates. Maximal degree in co-relation 3053. Up to 447 conditions per place. [2025-03-17 14:33:16,827 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 51 selfloop transitions, 9 changer transitions 12/75 dead transitions. [2025-03-17 14:33:16,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 75 transitions, 435 flow [2025-03-17 14:33:16,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 14:33:16,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 14:33:16,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2025-03-17 14:33:16,828 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4954954954954955 [2025-03-17 14:33:16,828 INFO L175 Difference]: Start difference. First operand has 49 places, 36 transitions, 168 flow. Second operand 6 states and 110 transitions. [2025-03-17 14:33:16,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 75 transitions, 435 flow [2025-03-17 14:33:16,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 75 transitions, 411 flow, removed 10 selfloop flow, removed 2 redundant places. [2025-03-17 14:33:16,832 INFO L231 Difference]: Finished difference. Result has 51 places, 37 transitions, 188 flow [2025-03-17 14:33:16,833 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=188, PETRI_PLACES=51, PETRI_TRANSITIONS=37} [2025-03-17 14:33:16,833 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 15 predicate places. [2025-03-17 14:33:16,833 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 37 transitions, 188 flow [2025-03-17 14:33:16,833 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 14:33:16,833 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:33:16,833 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] [2025-03-17 14:33:16,833 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-03-17 14:33:16,834 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-17 14:33:16,834 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:33:16,834 INFO L85 PathProgramCache]: Analyzing trace with hash -694774011, now seen corresponding path program 2 times [2025-03-17 14:33:16,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:33:16,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027297681] [2025-03-17 14:33:16,834 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:33:16,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:33:16,842 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 29 statements into 2 equivalence classes. [2025-03-17 14:33:16,854 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-03-17 14:33:16,855 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:33:16,855 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:33:16,902 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 14:33:16,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:33:16,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027297681] [2025-03-17 14:33:16,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027297681] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:33:16,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:33:16,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 14:33:16,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530591909] [2025-03-17 14:33:16,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:33:16,903 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:33:16,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:33:16,903 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:33:16,903 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:33:16,903 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2025-03-17 14:33:16,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 37 transitions, 188 flow. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 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 14:33:16,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:33:16,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2025-03-17 14:33:16,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:33:17,041 INFO L124 PetriNetUnfolderBase]: 936/1678 cut-off events. [2025-03-17 14:33:17,041 INFO L125 PetriNetUnfolderBase]: For 1663/1663 co-relation queries the response was YES. [2025-03-17 14:33:17,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4122 conditions, 1678 events. 936/1678 cut-off events. For 1663/1663 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 8012 event pairs, 409 based on Foata normal form. 33/1441 useless extension candidates. Maximal degree in co-relation 3178. Up to 667 conditions per place. [2025-03-17 14:33:17,045 INFO L140 encePairwiseOnDemand]: 34/37 looper letters, 54 selfloop transitions, 9 changer transitions 3/69 dead transitions. [2025-03-17 14:33:17,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 69 transitions, 431 flow [2025-03-17 14:33:17,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:33:17,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:33:17,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 85 transitions. [2025-03-17 14:33:17,046 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5743243243243243 [2025-03-17 14:33:17,047 INFO L175 Difference]: Start difference. First operand has 51 places, 37 transitions, 188 flow. Second operand 4 states and 85 transitions. [2025-03-17 14:33:17,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 69 transitions, 431 flow [2025-03-17 14:33:17,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 69 transitions, 409 flow, removed 4 selfloop flow, removed 4 redundant places. [2025-03-17 14:33:17,050 INFO L231 Difference]: Finished difference. Result has 52 places, 38 transitions, 226 flow [2025-03-17 14:33:17,050 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=226, PETRI_PLACES=52, PETRI_TRANSITIONS=38} [2025-03-17 14:33:17,050 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 16 predicate places. [2025-03-17 14:33:17,050 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 38 transitions, 226 flow [2025-03-17 14:33:17,051 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 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 14:33:17,051 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:33:17,051 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] [2025-03-17 14:33:17,051 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2025-03-17 14:33:17,051 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-17 14:33:17,051 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:33:17,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1079237429, now seen corresponding path program 3 times [2025-03-17 14:33:17,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:33:17,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540586907] [2025-03-17 14:33:17,052 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:33:17,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:33:17,057 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 34 statements into 4 equivalence classes. [2025-03-17 14:33:17,065 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 31 of 34 statements. [2025-03-17 14:33:17,066 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 14:33:17,066 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:33:17,191 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-17 14:33:17,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:33:17,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540586907] [2025-03-17 14:33:17,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540586907] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:33:17,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413605674] [2025-03-17 14:33:17,191 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:33:17,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:33:17,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:33:17,193 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 14:33:17,195 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 14:33:17,233 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 34 statements into 4 equivalence classes. [2025-03-17 14:33:17,251 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 31 of 34 statements. [2025-03-17 14:33:17,251 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 14:33:17,251 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:33:17,253 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-17 14:33:17,255 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:33:17,344 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-17 14:33:17,345 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:33:17,377 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-03-17 14:33:17,378 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 27 treesize of output 11 [2025-03-17 14:33:17,412 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-17 14:33:17,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413605674] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:33:17,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:33:17,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 12 [2025-03-17 14:33:17,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380621349] [2025-03-17 14:33:17,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:33:17,413 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-17 14:33:17,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:33:17,414 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-17 14:33:17,414 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2025-03-17 14:33:17,414 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2025-03-17 14:33:17,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 38 transitions, 226 flow. Second operand has 13 states, 13 states have (on average 12.076923076923077) internal successors, (157), 13 states have internal predecessors, (157), 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 14:33:17,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:33:17,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2025-03-17 14:33:17,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:33:17,741 INFO L124 PetriNetUnfolderBase]: 959/1673 cut-off events. [2025-03-17 14:33:17,741 INFO L125 PetriNetUnfolderBase]: For 2728/2728 co-relation queries the response was YES. [2025-03-17 14:33:17,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4561 conditions, 1673 events. 959/1673 cut-off events. For 2728/2728 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 7542 event pairs, 140 based on Foata normal form. 4/1415 useless extension candidates. Maximal degree in co-relation 4526. Up to 300 conditions per place. [2025-03-17 14:33:17,747 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 85 selfloop transitions, 15 changer transitions 45/148 dead transitions. [2025-03-17 14:33:17,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 148 transitions, 831 flow [2025-03-17 14:33:17,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-17 14:33:17,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-17 14:33:17,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 231 transitions. [2025-03-17 14:33:17,749 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5675675675675675 [2025-03-17 14:33:17,749 INFO L175 Difference]: Start difference. First operand has 52 places, 38 transitions, 226 flow. Second operand 11 states and 231 transitions. [2025-03-17 14:33:17,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 148 transitions, 831 flow [2025-03-17 14:33:17,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 148 transitions, 779 flow, removed 26 selfloop flow, removed 2 redundant places. [2025-03-17 14:33:17,754 INFO L231 Difference]: Finished difference. Result has 61 places, 42 transitions, 294 flow [2025-03-17 14:33:17,754 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=294, PETRI_PLACES=61, PETRI_TRANSITIONS=42} [2025-03-17 14:33:17,756 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 25 predicate places. [2025-03-17 14:33:17,756 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 42 transitions, 294 flow [2025-03-17 14:33:17,756 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 12.076923076923077) internal successors, (157), 13 states have internal predecessors, (157), 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 14:33:17,756 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:33:17,756 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] [2025-03-17 14:33:17,762 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 14:33:17,956 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 14:33:17,957 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-17 14:33:17,957 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:33:17,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1274876649, now seen corresponding path program 4 times [2025-03-17 14:33:17,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:33:17,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137685160] [2025-03-17 14:33:17,957 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 14:33:17,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:33:17,969 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 34 statements into 2 equivalence classes. [2025-03-17 14:33:17,989 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 14:33:17,990 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 14:33:17,990 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:33:18,289 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:33:18,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:33:18,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137685160] [2025-03-17 14:33:18,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137685160] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:33:18,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386740601] [2025-03-17 14:33:18,290 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 14:33:18,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:33:18,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:33:18,292 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 14:33:18,293 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 14:33:18,326 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 34 statements into 2 equivalence classes. [2025-03-17 14:33:18,351 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 14:33:18,351 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 14:33:18,351 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:33:18,354 INFO L256 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-17 14:33:18,356 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:33:22,519 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 5 refuted. 1 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-17 14:33:22,519 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:33:22,591 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-03-17 14:33:22,591 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 28 treesize of output 11 [2025-03-17 14:33:22,634 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-17 14:33:22,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386740601] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:33:22,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:33:22,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 14 [2025-03-17 14:33:22,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017040252] [2025-03-17 14:33:22,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:33:22,635 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-17 14:33:22,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:33:22,635 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-17 14:33:22,636 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=171, Unknown=1, NotChecked=0, Total=210 [2025-03-17 14:33:26,656 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-03-17 14:33:26,657 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2025-03-17 14:33:26,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 42 transitions, 294 flow. Second operand has 15 states, 15 states have (on average 11.266666666666667) internal successors, (169), 15 states have internal predecessors, (169), 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 14:33:26,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:33:26,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2025-03-17 14:33:26,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:33:27,555 INFO L124 PetriNetUnfolderBase]: 2158/3722 cut-off events. [2025-03-17 14:33:27,555 INFO L125 PetriNetUnfolderBase]: For 6169/6169 co-relation queries the response was YES. [2025-03-17 14:33:27,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10009 conditions, 3722 events. 2158/3722 cut-off events. For 6169/6169 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 19861 event pairs, 140 based on Foata normal form. 17/3160 useless extension candidates. Maximal degree in co-relation 9970. Up to 675 conditions per place. [2025-03-17 14:33:27,568 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 122 selfloop transitions, 37 changer transitions 66/228 dead transitions. [2025-03-17 14:33:27,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 228 transitions, 1388 flow [2025-03-17 14:33:27,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-17 14:33:27,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2025-03-17 14:33:27,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 344 transitions. [2025-03-17 14:33:27,571 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5165165165165165 [2025-03-17 14:33:27,571 INFO L175 Difference]: Start difference. First operand has 61 places, 42 transitions, 294 flow. Second operand 18 states and 344 transitions. [2025-03-17 14:33:27,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 228 transitions, 1388 flow [2025-03-17 14:33:27,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 228 transitions, 1246 flow, removed 50 selfloop flow, removed 8 redundant places. [2025-03-17 14:33:27,581 INFO L231 Difference]: Finished difference. Result has 79 places, 62 transitions, 554 flow [2025-03-17 14:33:27,581 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=554, PETRI_PLACES=79, PETRI_TRANSITIONS=62} [2025-03-17 14:33:27,582 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 43 predicate places. [2025-03-17 14:33:27,582 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 62 transitions, 554 flow [2025-03-17 14:33:27,582 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 11.266666666666667) internal successors, (169), 15 states have internal predecessors, (169), 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 14:33:27,583 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:33:27,583 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:33:27,589 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-17 14:33:27,783 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 14:33:27,784 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-17 14:33:27,784 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:33:27,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1734841398, now seen corresponding path program 5 times [2025-03-17 14:33:27,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:33:27,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236521584] [2025-03-17 14:33:27,785 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 14:33:27,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:33:27,791 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 40 statements into 4 equivalence classes. [2025-03-17 14:33:27,812 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 40 of 40 statements. [2025-03-17 14:33:27,812 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-03-17 14:33:27,812 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:33:27,908 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-03-17 14:33:27,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:33:27,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236521584] [2025-03-17 14:33:27,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236521584] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:33:27,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325393688] [2025-03-17 14:33:27,909 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 14:33:27,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:33:27,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:33:27,911 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 14:33:27,913 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 14:33:27,954 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 40 statements into 4 equivalence classes. [2025-03-17 14:33:27,991 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 40 of 40 statements. [2025-03-17 14:33:27,991 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-03-17 14:33:27,991 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:33:27,994 INFO L256 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-17 14:33:27,995 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:33:28,145 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-03-17 14:33:28,145 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:33:28,308 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-03-17 14:33:28,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325393688] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:33:28,308 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:33:28,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2025-03-17 14:33:28,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732449291] [2025-03-17 14:33:28,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:33:28,309 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-17 14:33:28,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:33:28,309 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-17 14:33:28,309 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2025-03-17 14:33:28,330 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2025-03-17 14:33:28,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 62 transitions, 554 flow. Second operand has 20 states, 20 states have (on average 12.0) internal successors, (240), 20 states have internal predecessors, (240), 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 14:33:28,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:33:28,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2025-03-17 14:33:28,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:33:28,943 INFO L124 PetriNetUnfolderBase]: 4103/7169 cut-off events. [2025-03-17 14:33:28,943 INFO L125 PetriNetUnfolderBase]: For 18512/18512 co-relation queries the response was YES. [2025-03-17 14:33:28,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19894 conditions, 7169 events. 4103/7169 cut-off events. For 18512/18512 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 46184 event pairs, 2736 based on Foata normal form. 132/6168 useless extension candidates. Maximal degree in co-relation 18342. Up to 3714 conditions per place. [2025-03-17 14:33:28,966 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 55 selfloop transitions, 6 changer transitions 63/127 dead transitions. [2025-03-17 14:33:28,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 127 transitions, 1225 flow [2025-03-17 14:33:28,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 14:33:28,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 14:33:28,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2025-03-17 14:33:28,970 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4264264264264264 [2025-03-17 14:33:28,970 INFO L175 Difference]: Start difference. First operand has 79 places, 62 transitions, 554 flow. Second operand 9 states and 142 transitions. [2025-03-17 14:33:28,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 127 transitions, 1225 flow [2025-03-17 14:33:28,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 127 transitions, 1054 flow, removed 60 selfloop flow, removed 8 redundant places. [2025-03-17 14:33:29,001 INFO L231 Difference]: Finished difference. Result has 84 places, 64 transitions, 525 flow [2025-03-17 14:33:29,001 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=449, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=525, PETRI_PLACES=84, PETRI_TRANSITIONS=64} [2025-03-17 14:33:29,001 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 48 predicate places. [2025-03-17 14:33:29,002 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 64 transitions, 525 flow [2025-03-17 14:33:29,002 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 12.0) internal successors, (240), 20 states have internal predecessors, (240), 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 14:33:29,002 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:33:29,002 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:33:29,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-17 14:33:29,203 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:33:29,203 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-17 14:33:29,203 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:33:29,204 INFO L85 PathProgramCache]: Analyzing trace with hash 402050438, now seen corresponding path program 6 times [2025-03-17 14:33:29,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:33:29,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026821011] [2025-03-17 14:33:29,204 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 14:33:29,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:33:29,210 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 42 statements into 5 equivalence classes. [2025-03-17 14:33:29,236 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) and asserted 37 of 42 statements. [2025-03-17 14:33:29,236 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2025-03-17 14:33:29,236 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:33:29,826 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 26 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-17 14:33:29,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:33:29,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026821011] [2025-03-17 14:33:29,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026821011] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:33:29,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361848544] [2025-03-17 14:33:29,826 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 14:33:29,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:33:29,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:33:29,828 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 14:33:29,829 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 14:33:29,865 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 42 statements into 5 equivalence classes. [2025-03-17 14:33:29,893 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) and asserted 37 of 42 statements. [2025-03-17 14:33:29,894 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2025-03-17 14:33:29,894 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:33:29,895 INFO L256 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-03-17 14:33:29,896 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:33:30,289 INFO L349 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2025-03-17 14:33:30,289 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 31 treesize of output 16 [2025-03-17 14:33:30,295 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 26 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-17 14:33:30,296 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:33:33,288 INFO L349 Elim1Store]: treesize reduction 15, result has 54.5 percent of original size [2025-03-17 14:33:33,288 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 59 treesize of output 33 [2025-03-17 14:33:33,555 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 23 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-17 14:33:33,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361848544] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:33:33,556 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:33:33,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2025-03-17 14:33:33,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335888941] [2025-03-17 14:33:33,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:33:33,556 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-03-17 14:33:33,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:33:33,557 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-03-17 14:33:33,557 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=575, Unknown=1, NotChecked=0, Total=702 [2025-03-17 14:33:36,435 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.86s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-03-17 14:33:36,436 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2025-03-17 14:33:36,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 64 transitions, 525 flow. Second operand has 27 states, 27 states have (on average 10.62962962962963) internal successors, (287), 27 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:33:36,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:33:36,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2025-03-17 14:33:36,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:33:37,469 INFO L124 PetriNetUnfolderBase]: 4613/7961 cut-off events. [2025-03-17 14:33:37,470 INFO L125 PetriNetUnfolderBase]: For 17437/17437 co-relation queries the response was YES. [2025-03-17 14:33:37,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22061 conditions, 7961 events. 4613/7961 cut-off events. For 17437/17437 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 50631 event pairs, 1718 based on Foata normal form. 2/6725 useless extension candidates. Maximal degree in co-relation 19081. Up to 3130 conditions per place. [2025-03-17 14:33:37,493 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 62 selfloop transitions, 10 changer transitions 131/206 dead transitions. [2025-03-17 14:33:37,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 206 transitions, 1641 flow [2025-03-17 14:33:37,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-17 14:33:37,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-03-17 14:33:37,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 248 transitions. [2025-03-17 14:33:37,495 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44684684684684683 [2025-03-17 14:33:37,495 INFO L175 Difference]: Start difference. First operand has 84 places, 64 transitions, 525 flow. Second operand 15 states and 248 transitions. [2025-03-17 14:33:37,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 206 transitions, 1641 flow [2025-03-17 14:33:37,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 206 transitions, 1547 flow, removed 45 selfloop flow, removed 5 redundant places. [2025-03-17 14:33:37,552 INFO L231 Difference]: Finished difference. Result has 99 places, 66 transitions, 545 flow [2025-03-17 14:33:37,552 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=477, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=545, PETRI_PLACES=99, PETRI_TRANSITIONS=66} [2025-03-17 14:33:37,553 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 63 predicate places. [2025-03-17 14:33:37,553 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 66 transitions, 545 flow [2025-03-17 14:33:37,553 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 10.62962962962963) internal successors, (287), 27 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:33:37,553 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:33:37,553 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:33:37,560 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-17 14:33:37,758 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,SelfDestructingSolverStorable14 [2025-03-17 14:33:37,758 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-17 14:33:37,758 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:33:37,759 INFO L85 PathProgramCache]: Analyzing trace with hash 651925884, now seen corresponding path program 7 times [2025-03-17 14:33:37,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:33:37,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618533733] [2025-03-17 14:33:37,759 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-17 14:33:37,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:33:37,765 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 44 statements into 1 equivalence classes. [2025-03-17 14:33:37,776 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 44 of 44 statements. [2025-03-17 14:33:37,776 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:33:37,776 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:33:38,180 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 9 proven. 43 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 14:33:38,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:33:38,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618533733] [2025-03-17 14:33:38,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618533733] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:33:38,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735325435] [2025-03-17 14:33:38,181 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-17 14:33:38,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:33:38,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:33:38,183 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 14:33:38,184 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 14:33:38,225 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 44 statements into 1 equivalence classes. [2025-03-17 14:33:38,248 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 44 of 44 statements. [2025-03-17 14:33:38,248 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:33:38,248 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:33:38,252 INFO L256 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-17 14:33:38,253 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:33:38,453 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-03-17 14:33:38,454 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:33:38,544 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-03-17 14:33:38,544 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 28 treesize of output 11 [2025-03-17 14:33:38,619 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-03-17 14:33:38,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735325435] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:33:38,619 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:33:38,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8] total 24 [2025-03-17 14:33:38,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684004998] [2025-03-17 14:33:38,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:33:38,620 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-17 14:33:38,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:33:38,620 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-17 14:33:38,621 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2025-03-17 14:33:38,645 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2025-03-17 14:33:38,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 66 transitions, 545 flow. Second operand has 25 states, 25 states have (on average 12.04) internal successors, (301), 25 states have internal predecessors, (301), 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 14:33:38,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:33:38,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2025-03-17 14:33:38,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:33:39,605 INFO L124 PetriNetUnfolderBase]: 2718/4678 cut-off events. [2025-03-17 14:33:39,609 INFO L125 PetriNetUnfolderBase]: For 10223/10223 co-relation queries the response was YES. [2025-03-17 14:33:39,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13012 conditions, 4678 events. 2718/4678 cut-off events. For 10223/10223 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 25883 event pairs, 176 based on Foata normal form. 1/3953 useless extension candidates. Maximal degree in co-relation 12965. Up to 850 conditions per place. [2025-03-17 14:33:39,634 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 160 selfloop transitions, 48 changer transitions 78/289 dead transitions. [2025-03-17 14:33:39,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 289 transitions, 1844 flow [2025-03-17 14:33:39,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-17 14:33:39,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2025-03-17 14:33:39,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 458 transitions. [2025-03-17 14:33:39,638 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5157657657657657 [2025-03-17 14:33:39,638 INFO L175 Difference]: Start difference. First operand has 99 places, 66 transitions, 545 flow. Second operand 24 states and 458 transitions. [2025-03-17 14:33:39,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 289 transitions, 1844 flow [2025-03-17 14:33:39,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 289 transitions, 1814 flow, removed 10 selfloop flow, removed 11 redundant places. [2025-03-17 14:33:39,667 INFO L231 Difference]: Finished difference. Result has 105 places, 75 transitions, 699 flow [2025-03-17 14:33:39,667 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=515, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=699, PETRI_PLACES=105, PETRI_TRANSITIONS=75} [2025-03-17 14:33:39,667 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 69 predicate places. [2025-03-17 14:33:39,668 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 75 transitions, 699 flow [2025-03-17 14:33:39,668 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 12.04) internal successors, (301), 25 states have internal predecessors, (301), 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 14:33:39,668 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:33:39,668 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:33:39,690 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-17 14:33:39,873 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,SelfDestructingSolverStorable15 [2025-03-17 14:33:39,873 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-17 14:33:39,873 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:33:39,874 INFO L85 PathProgramCache]: Analyzing trace with hash -560948221, now seen corresponding path program 8 times [2025-03-17 14:33:39,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:33:39,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597996869] [2025-03-17 14:33:39,874 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:33:39,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:33:39,880 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 47 statements into 2 equivalence classes. [2025-03-17 14:33:39,888 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 47 of 47 statements. [2025-03-17 14:33:39,888 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:33:39,888 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:33:39,958 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 27 proven. 9 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-03-17 14:33:39,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:33:39,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597996869] [2025-03-17 14:33:39,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597996869] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:33:39,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399090485] [2025-03-17 14:33:39,959 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:33:39,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:33:39,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:33:39,961 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 14:33:39,962 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 14:33:40,002 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 47 statements into 2 equivalence classes. [2025-03-17 14:33:40,029 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 47 of 47 statements. [2025-03-17 14:33:40,029 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:33:40,029 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:33:40,031 INFO L256 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-17 14:33:40,032 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:33:40,074 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 27 proven. 9 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-03-17 14:33:40,074 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:33:40,129 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 27 proven. 9 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-03-17 14:33:40,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399090485] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:33:40,129 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:33:40,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2025-03-17 14:33:40,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631636710] [2025-03-17 14:33:40,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:33:40,130 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 14:33:40,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:33:40,130 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 14:33:40,130 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-03-17 14:33:40,130 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2025-03-17 14:33:40,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 75 transitions, 699 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 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 14:33:40,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:33:40,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2025-03-17 14:33:40,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:33:40,692 INFO L124 PetriNetUnfolderBase]: 5266/9036 cut-off events. [2025-03-17 14:33:40,692 INFO L125 PetriNetUnfolderBase]: For 28935/28935 co-relation queries the response was YES. [2025-03-17 14:33:40,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26801 conditions, 9036 events. 5266/9036 cut-off events. For 28935/28935 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 55923 event pairs, 1138 based on Foata normal form. 22/7658 useless extension candidates. Maximal degree in co-relation 26717. Up to 2360 conditions per place. [2025-03-17 14:33:40,720 INFO L140 encePairwiseOnDemand]: 34/37 looper letters, 99 selfloop transitions, 63 changer transitions 0/165 dead transitions. [2025-03-17 14:33:40,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 165 transitions, 1680 flow [2025-03-17 14:33:40,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 14:33:40,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 14:33:40,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2025-03-17 14:33:40,722 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5990990990990991 [2025-03-17 14:33:40,722 INFO L175 Difference]: Start difference. First operand has 105 places, 75 transitions, 699 flow. Second operand 6 states and 133 transitions. [2025-03-17 14:33:40,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 165 transitions, 1680 flow [2025-03-17 14:33:40,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 165 transitions, 1560 flow, removed 17 selfloop flow, removed 14 redundant places. [2025-03-17 14:33:40,742 INFO L231 Difference]: Finished difference. Result has 97 places, 109 transitions, 1206 flow [2025-03-17 14:33:40,742 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=637, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1206, PETRI_PLACES=97, PETRI_TRANSITIONS=109} [2025-03-17 14:33:40,743 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 61 predicate places. [2025-03-17 14:33:40,744 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 109 transitions, 1206 flow [2025-03-17 14:33:40,744 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 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 14:33:40,744 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:33:40,744 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:33:40,750 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 14:33:40,948 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,SelfDestructingSolverStorable16 [2025-03-17 14:33:40,948 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-17 14:33:40,949 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:33:40,949 INFO L85 PathProgramCache]: Analyzing trace with hash 946448577, now seen corresponding path program 9 times [2025-03-17 14:33:40,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:33:40,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399074250] [2025-03-17 14:33:40,950 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:33:40,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:33:40,957 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 50 statements into 6 equivalence classes. [2025-03-17 14:33:40,973 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 47 of 50 statements. [2025-03-17 14:33:40,973 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-17 14:33:40,973 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:33:41,120 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 19 proven. 19 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2025-03-17 14:33:41,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:33:41,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399074250] [2025-03-17 14:33:41,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399074250] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:33:41,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302655656] [2025-03-17 14:33:41,121 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:33:41,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:33:41,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:33:41,122 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 14:33:41,124 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 14:33:41,162 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 50 statements into 6 equivalence classes. [2025-03-17 14:33:41,187 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 47 of 50 statements. [2025-03-17 14:33:41,187 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-17 14:33:41,187 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:33:41,189 INFO L256 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-03-17 14:33:41,190 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:33:41,308 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 12 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-03-17 14:33:41,308 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:33:41,326 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-03-17 14:33:41,326 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 27 treesize of output 11 [2025-03-17 14:33:41,382 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 19 proven. 17 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-03-17 14:33:41,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302655656] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:33:41,382 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:33:41,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 9 [2025-03-17 14:33:41,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547550653] [2025-03-17 14:33:41,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:33:41,383 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 14:33:41,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:33:41,383 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 14:33:41,383 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2025-03-17 14:33:41,383 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2025-03-17 14:33:41,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 109 transitions, 1206 flow. Second operand has 10 states, 10 states have (on average 13.2) internal successors, (132), 10 states have internal predecessors, (132), 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 14:33:41,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:33:41,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2025-03-17 14:33:41,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:33:42,606 INFO L124 PetriNetUnfolderBase]: 7884/13510 cut-off events. [2025-03-17 14:33:42,606 INFO L125 PetriNetUnfolderBase]: For 55439/55439 co-relation queries the response was YES. [2025-03-17 14:33:42,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41779 conditions, 13510 events. 7884/13510 cut-off events. For 55439/55439 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 87735 event pairs, 536 based on Foata normal form. 9/11426 useless extension candidates. Maximal degree in co-relation 41699. Up to 2475 conditions per place. [2025-03-17 14:33:42,642 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 214 selfloop transitions, 118 changer transitions 39/374 dead transitions. [2025-03-17 14:33:42,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 374 transitions, 3381 flow [2025-03-17 14:33:42,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-03-17 14:33:42,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2025-03-17 14:33:42,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 437 transitions. [2025-03-17 14:33:42,645 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5905405405405405 [2025-03-17 14:33:42,645 INFO L175 Difference]: Start difference. First operand has 97 places, 109 transitions, 1206 flow. Second operand 20 states and 437 transitions. [2025-03-17 14:33:42,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 374 transitions, 3381 flow [2025-03-17 14:33:42,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 374 transitions, 3139 flow, removed 121 selfloop flow, removed 0 redundant places. [2025-03-17 14:33:42,710 INFO L231 Difference]: Finished difference. Result has 126 places, 157 transitions, 2095 flow [2025-03-17 14:33:42,710 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1106, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2095, PETRI_PLACES=126, PETRI_TRANSITIONS=157} [2025-03-17 14:33:42,711 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 90 predicate places. [2025-03-17 14:33:42,711 INFO L471 AbstractCegarLoop]: Abstraction has has 126 places, 157 transitions, 2095 flow [2025-03-17 14:33:42,711 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.2) internal successors, (132), 10 states have internal predecessors, (132), 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 14:33:42,711 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:33:42,711 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:33:42,717 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 14:33:42,911 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-03-17 14:33:42,912 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-17 14:33:42,912 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:33:42,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1013773533, now seen corresponding path program 10 times [2025-03-17 14:33:42,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:33:42,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907638869] [2025-03-17 14:33:42,912 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 14:33:42,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:33:42,917 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 50 statements into 2 equivalence classes. [2025-03-17 14:33:42,934 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 50 of 50 statements. [2025-03-17 14:33:42,935 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 14:33:42,935 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:33:43,336 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 9 proven. 68 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-17 14:33:43,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:33:43,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907638869] [2025-03-17 14:33:43,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907638869] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:33:43,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211585670] [2025-03-17 14:33:43,337 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 14:33:43,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:33:43,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:33:43,338 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 14:33:43,340 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 14:33:43,381 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 50 statements into 2 equivalence classes. [2025-03-17 14:33:43,415 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 50 of 50 statements. [2025-03-17 14:33:43,416 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 14:33:43,416 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:33:43,418 INFO L256 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-03-17 14:33:43,420 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:34:03,283 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 9 proven. 24 refuted. 12 times theorem prover too weak. 36 trivial. 0 not checked. [2025-03-17 14:34:03,284 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:34:03,402 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-03-17 14:34:03,402 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 28 treesize of output 11 [2025-03-17 14:34:03,473 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 9 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-03-17 14:34:03,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211585670] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:34:03,473 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:34:03,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 26 [2025-03-17 14:34:03,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796908187] [2025-03-17 14:34:03,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:34:03,474 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-03-17 14:34:03,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:34:03,475 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-03-17 14:34:03,475 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=606, Unknown=6, NotChecked=0, Total=702 [2025-03-17 14:34:03,814 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2025-03-17 14:34:03,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 157 transitions, 2095 flow. Second operand has 27 states, 27 states have (on average 10.62962962962963) internal successors, (287), 27 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:34:03,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:34:03,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2025-03-17 14:34:03,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:34:08,728 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.90s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-03-17 14:34:11,419 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.67s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-03-17 14:34:12,649 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-03-17 14:34:13,798 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-03-17 14:34:17,811 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-03-17 14:34:24,300 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-03-17 14:34:26,053 INFO L124 PetriNetUnfolderBase]: 14043/23975 cut-off events. [2025-03-17 14:34:26,053 INFO L125 PetriNetUnfolderBase]: For 71657/71657 co-relation queries the response was YES. [2025-03-17 14:34:26,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71065 conditions, 23975 events. 14043/23975 cut-off events. For 71657/71657 co-relation queries the response was YES. Maximal size of possible extension queue 626. Compared 171310 event pairs, 1283 based on Foata normal form. 30/20293 useless extension candidates. Maximal degree in co-relation 70973. Up to 4400 conditions per place. [2025-03-17 14:34:26,132 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 288 selfloop transitions, 229 changer transitions 180/700 dead transitions. [2025-03-17 14:34:26,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 700 transitions, 6015 flow [2025-03-17 14:34:26,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2025-03-17 14:34:26,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2025-03-17 14:34:26,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 850 transitions. [2025-03-17 14:34:26,134 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5221130221130221 [2025-03-17 14:34:26,134 INFO L175 Difference]: Start difference. First operand has 126 places, 157 transitions, 2095 flow. Second operand 44 states and 850 transitions. [2025-03-17 14:34:26,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 700 transitions, 6015 flow [2025-03-17 14:34:26,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 700 transitions, 5492 flow, removed 155 selfloop flow, removed 5 redundant places. [2025-03-17 14:34:26,258 INFO L231 Difference]: Finished difference. Result has 185 places, 256 transitions, 3854 flow [2025-03-17 14:34:26,259 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1668, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=3854, PETRI_PLACES=185, PETRI_TRANSITIONS=256} [2025-03-17 14:34:26,259 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 149 predicate places. [2025-03-17 14:34:26,259 INFO L471 AbstractCegarLoop]: Abstraction has has 185 places, 256 transitions, 3854 flow [2025-03-17 14:34:26,259 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 10.62962962962963) internal successors, (287), 27 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:34:26,259 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:34:26,259 INFO L206 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:34:26,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-03-17 14:34:26,459 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:34:26,460 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-17 14:34:26,460 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:34:26,460 INFO L85 PathProgramCache]: Analyzing trace with hash -813179390, now seen corresponding path program 11 times [2025-03-17 14:34:26,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:34:26,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195988024] [2025-03-17 14:34:26,460 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 14:34:26,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:34:26,466 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 56 statements into 6 equivalence classes. [2025-03-17 14:34:26,478 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 56 of 56 statements. [2025-03-17 14:34:26,478 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-03-17 14:34:26,478 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:34:26,637 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 35 proven. 36 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2025-03-17 14:34:26,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:34:26,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195988024] [2025-03-17 14:34:26,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195988024] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:34:26,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099745686] [2025-03-17 14:34:26,638 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 14:34:26,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:34:26,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:34:26,640 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 14:34:26,641 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 14:34:26,682 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 56 statements into 6 equivalence classes. [2025-03-17 14:34:26,715 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 56 of 56 statements. [2025-03-17 14:34:26,716 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-03-17 14:34:26,716 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:34:26,717 INFO L256 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-17 14:34:26,718 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:34:26,935 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 39 proven. 32 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2025-03-17 14:34:26,936 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:34:27,196 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 29 proven. 42 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2025-03-17 14:34:27,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099745686] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:34:27,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:34:27,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2025-03-17 14:34:27,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16385699] [2025-03-17 14:34:27,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:34:27,197 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-03-17 14:34:27,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:34:27,197 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-03-17 14:34:27,198 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=739, Unknown=0, NotChecked=0, Total=992 [2025-03-17 14:34:27,230 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2025-03-17 14:34:27,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 256 transitions, 3854 flow. Second operand has 32 states, 32 states have (on average 11.25) internal successors, (360), 32 states have internal predecessors, (360), 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 14:34:27,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:34:27,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2025-03-17 14:34:27,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:34:31,202 INFO L124 PetriNetUnfolderBase]: 17847/30803 cut-off events. [2025-03-17 14:34:31,202 INFO L125 PetriNetUnfolderBase]: For 211719/211719 co-relation queries the response was YES. [2025-03-17 14:34:31,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99434 conditions, 30803 events. 17847/30803 cut-off events. For 211719/211719 co-relation queries the response was YES. Maximal size of possible extension queue 679. Compared 237865 event pairs, 12337 based on Foata normal form. 322/26290 useless extension candidates. Maximal degree in co-relation 97885. Up to 23963 conditions per place. [2025-03-17 14:34:31,377 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 247 selfloop transitions, 8 changer transitions 236/494 dead transitions. [2025-03-17 14:34:31,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 494 transitions, 6182 flow [2025-03-17 14:34:31,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-03-17 14:34:31,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2025-03-17 14:34:31,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 417 transitions. [2025-03-17 14:34:31,378 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4900117508813161 [2025-03-17 14:34:31,378 INFO L175 Difference]: Start difference. First operand has 185 places, 256 transitions, 3854 flow. Second operand 23 states and 417 transitions. [2025-03-17 14:34:31,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 494 transitions, 6182 flow [2025-03-17 14:34:32,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 494 transitions, 5604 flow, removed 218 selfloop flow, removed 14 redundant places. [2025-03-17 14:34:32,709 INFO L231 Difference]: Finished difference. Result has 210 places, 258 transitions, 3563 flow [2025-03-17 14:34:32,710 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=3341, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3563, PETRI_PLACES=210, PETRI_TRANSITIONS=258} [2025-03-17 14:34:32,712 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 174 predicate places. [2025-03-17 14:34:32,713 INFO L471 AbstractCegarLoop]: Abstraction has has 210 places, 258 transitions, 3563 flow [2025-03-17 14:34:32,713 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 11.25) internal successors, (360), 32 states have internal predecessors, (360), 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 14:34:32,713 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:34:32,713 INFO L206 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:34:32,720 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 14:34:32,913 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,SelfDestructingSolverStorable19 [2025-03-17 14:34:32,914 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-17 14:34:32,915 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:34:32,915 INFO L85 PathProgramCache]: Analyzing trace with hash 764572754, now seen corresponding path program 12 times [2025-03-17 14:34:32,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:34:32,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448415640] [2025-03-17 14:34:32,915 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 14:34:32,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:34:32,928 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 58 statements into 7 equivalence classes. [2025-03-17 14:34:32,969 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 58 of 58 statements. [2025-03-17 14:34:32,971 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-03-17 14:34:32,971 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:34:33,504 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 28 proven. 82 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-17 14:34:33,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:34:33,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448415640] [2025-03-17 14:34:33,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448415640] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:34:33,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227121724] [2025-03-17 14:34:33,505 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 14:34:33,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:34:33,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:34:33,507 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 14:34:33,509 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 14:34:33,550 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 58 statements into 7 equivalence classes. [2025-03-17 14:34:33,606 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 58 of 58 statements. [2025-03-17 14:34:33,606 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-03-17 14:34:33,606 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:34:33,607 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-03-17 14:34:33,609 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:34:34,240 INFO L349 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2025-03-17 14:34:34,240 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 24 treesize of output 10 [2025-03-17 14:34:34,246 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 29 proven. 81 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-17 14:34:34,246 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:34:34,505 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2025-03-17 14:34:34,505 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 27 treesize of output 13 [2025-03-17 14:34:35,205 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 23 proven. 87 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-17 14:34:35,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227121724] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:34:35,205 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:34:35,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 50 [2025-03-17 14:34:35,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227259457] [2025-03-17 14:34:35,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:34:35,205 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2025-03-17 14:34:35,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:34:35,206 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2025-03-17 14:34:35,207 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=393, Invalid=2157, Unknown=0, NotChecked=0, Total=2550 [2025-03-17 14:34:35,280 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2025-03-17 14:34:35,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 258 transitions, 3563 flow. Second operand has 51 states, 51 states have (on average 11.03921568627451) internal successors, (563), 51 states have internal predecessors, (563), 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 14:34:35,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:34:35,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2025-03-17 14:34:35,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand