./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 3061b6dc Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/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_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/popl20-more-sum-array-hom.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 37731ec014f4053387ac8b56c0764486866d63670c206743514c9636df9b594a --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-19 09:52:15,342 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 09:52:15,394 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-19 09:52:15,397 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 09:52:15,399 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 09:52:15,415 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 09:52:15,415 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 09:52:15,418 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 09:52:15,418 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 09:52:15,419 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 09:52:15,419 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 09:52:15,419 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 09:52:15,420 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 09:52:15,420 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 09:52:15,420 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 09:52:15,420 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 09:52:15,421 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 09:52:15,422 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 09:52:15,422 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 09:52:15,423 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 09:52:15,423 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-19 09:52:15,423 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-19 09:52:15,423 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-19 09:52:15,424 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 09:52:15,424 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-19 09:52:15,424 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 09:52:15,424 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-19 09:52:15,424 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 09:52:15,425 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 09:52:15,425 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 09:52:15,425 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 09:52:15,425 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 09:52:15,425 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 09:52:15,426 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 09:52:15,426 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 09:52:15,427 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 09:52:15,427 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 09:52:15,428 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 09:52:15,428 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 09:52:15,428 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 09:52:15,428 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 09:52:15,429 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 09:52:15,429 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 37731ec014f4053387ac8b56c0764486866d63670c206743514c9636df9b594a [2024-11-19 09:52:15,636 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 09:52:15,660 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 09:52:15,662 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 09:52:15,663 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 09:52:15,664 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 09:52:15,665 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c [2024-11-19 09:52:16,899 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 09:52:17,053 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 09:52:17,054 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c [2024-11-19 09:52:17,060 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a2615bb3/e08a74a4af444e788874ee5fda4f7fc6/FLAG85dc533c1 [2024-11-19 09:52:17,072 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a2615bb3/e08a74a4af444e788874ee5fda4f7fc6 [2024-11-19 09:52:17,074 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 09:52:17,075 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 09:52:17,076 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 09:52:17,076 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 09:52:17,080 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 09:52:17,081 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:52:17" (1/1) ... [2024-11-19 09:52:17,082 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@707b36a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:52:17, skipping insertion in model container [2024-11-19 09:52:17,082 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:52:17" (1/1) ... [2024-11-19 09:52:17,099 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 09:52:17,294 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-19 09:52:17,296 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 09:52:17,302 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 09:52:17,321 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 09:52:17,335 INFO L204 MainTranslator]: Completed translation [2024-11-19 09:52:17,335 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:52:17 WrapperNode [2024-11-19 09:52:17,335 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 09:52:17,336 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 09:52:17,336 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 09:52:17,336 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 09:52:17,341 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:52:17" (1/1) ... [2024-11-19 09:52:17,347 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:52:17" (1/1) ... [2024-11-19 09:52:17,363 INFO L138 Inliner]: procedures = 24, calls = 20, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 89 [2024-11-19 09:52:17,365 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 09:52:17,366 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 09:52:17,366 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 09:52:17,366 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 09:52:17,379 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:52:17" (1/1) ... [2024-11-19 09:52:17,379 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:52:17" (1/1) ... [2024-11-19 09:52:17,381 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:52:17" (1/1) ... [2024-11-19 09:52:17,394 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-19 09:52:17,394 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:52:17" (1/1) ... [2024-11-19 09:52:17,394 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:52:17" (1/1) ... [2024-11-19 09:52:17,403 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:52:17" (1/1) ... [2024-11-19 09:52:17,408 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:52:17" (1/1) ... [2024-11-19 09:52:17,410 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:52:17" (1/1) ... [2024-11-19 09:52:17,411 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:52:17" (1/1) ... [2024-11-19 09:52:17,413 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 09:52:17,413 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 09:52:17,413 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 09:52:17,414 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 09:52:17,414 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:52:17" (1/1) ... [2024-11-19 09:52:17,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 09:52:17,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:52:17,441 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) [2024-11-19 09:52:17,443 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 [2024-11-19 09:52:17,480 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 09:52:17,480 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-19 09:52:17,480 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-19 09:52:17,480 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-19 09:52:17,480 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-19 09:52:17,480 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-19 09:52:17,481 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-19 09:52:17,481 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-19 09:52:17,481 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-19 09:52:17,481 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-19 09:52:17,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-19 09:52:17,482 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-19 09:52:17,482 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 09:52:17,482 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 09:52:17,482 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-19 09:52:17,483 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-19 09:52:17,484 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-19 09:52:17,579 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 09:52:17,581 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 09:52:17,814 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-19 09:52:17,814 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 09:52:17,950 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 09:52:17,950 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-19 09:52:17,951 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:52:17 BoogieIcfgContainer [2024-11-19 09:52:17,951 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 09:52:17,953 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 09:52:17,953 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 09:52:17,955 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 09:52:17,956 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 09:52:17" (1/3) ... [2024-11-19 09:52:17,956 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b09f67b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:52:17, skipping insertion in model container [2024-11-19 09:52:17,956 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:52:17" (2/3) ... [2024-11-19 09:52:17,957 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b09f67b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:52:17, skipping insertion in model container [2024-11-19 09:52:17,957 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:52:17" (3/3) ... [2024-11-19 09:52:17,958 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-sum-array-hom.wvr.c [2024-11-19 09:52:17,988 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 09:52:17,989 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2024-11-19 09:52:17,989 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-19 09:52:18,060 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-19 09:52:18,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 47 places, 41 transitions, 103 flow [2024-11-19 09:52:18,113 INFO L124 PetriNetUnfolderBase]: 4/38 cut-off events. [2024-11-19 09:52:18,114 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-19 09:52:18,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 38 events. 4/38 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 64 event pairs, 0 based on Foata normal form. 0/24 useless extension candidates. Maximal degree in co-relation 27. Up to 2 conditions per place. [2024-11-19 09:52:18,117 INFO L82 GeneralOperation]: Start removeDead. Operand has 47 places, 41 transitions, 103 flow [2024-11-19 09:52:18,120 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 37 transitions, 92 flow [2024-11-19 09:52:18,130 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 09:52:18,136 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;@1b0a6098, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 09:52:18,136 INFO L334 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2024-11-19 09:52:18,139 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-19 09:52:18,139 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-19 09:52:18,139 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-19 09:52:18,140 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:52:18,140 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-19 09:52:18,141 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:52:18,145 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:52:18,146 INFO L85 PathProgramCache]: Analyzing trace with hash 410499, now seen corresponding path program 1 times [2024-11-19 09:52:18,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:52:18,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216134350] [2024-11-19 09:52:18,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:52:18,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:52:18,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:52:18,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:18,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:52:18,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216134350] [2024-11-19 09:52:18,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216134350] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:52:18,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:52:18,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-19 09:52:18,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266923407] [2024-11-19 09:52:18,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:52:18,372 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:52:18,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:52:18,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:52:18,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:52:18,424 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-11-19 09:52:18,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 37 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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) [2024-11-19 09:52:18,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:52:18,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-11-19 09:52:18,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:52:18,557 INFO L124 PetriNetUnfolderBase]: 200/348 cut-off events. [2024-11-19 09:52:18,557 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-11-19 09:52:18,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 687 conditions, 348 events. 200/348 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1191 event pairs, 124 based on Foata normal form. 1/318 useless extension candidates. Maximal degree in co-relation 585. Up to 293 conditions per place. [2024-11-19 09:52:18,564 INFO L140 encePairwiseOnDemand]: 37/41 looper letters, 21 selfloop transitions, 2 changer transitions 0/34 dead transitions. [2024-11-19 09:52:18,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 34 transitions, 132 flow [2024-11-19 09:52:18,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:52:18,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:52:18,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2024-11-19 09:52:18,575 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5691056910569106 [2024-11-19 09:52:18,577 INFO L175 Difference]: Start difference. First operand has 43 places, 37 transitions, 92 flow. Second operand 3 states and 70 transitions. [2024-11-19 09:52:18,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 34 transitions, 132 flow [2024-11-19 09:52:18,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 34 transitions, 120 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-19 09:52:18,581 INFO L231 Difference]: Finished difference. Result has 36 places, 34 transitions, 78 flow [2024-11-19 09:52:18,584 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=36, PETRI_TRANSITIONS=34} [2024-11-19 09:52:18,588 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, -7 predicate places. [2024-11-19 09:52:18,589 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 34 transitions, 78 flow [2024-11-19 09:52:18,589 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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) [2024-11-19 09:52:18,589 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:52:18,589 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-19 09:52:18,590 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-19 09:52:18,590 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:52:18,591 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:52:18,591 INFO L85 PathProgramCache]: Analyzing trace with hash 410500, now seen corresponding path program 1 times [2024-11-19 09:52:18,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:52:18,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924665656] [2024-11-19 09:52:18,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:52:18,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:52:18,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:52:18,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:18,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:52:18,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924665656] [2024-11-19 09:52:18,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924665656] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:52:18,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:52:18,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:52:18,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398718055] [2024-11-19 09:52:18,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:52:18,895 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:52:18,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:52:18,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:52:18,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:52:18,921 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-11-19 09:52:18,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 34 transitions, 78 flow. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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) [2024-11-19 09:52:18,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:52:18,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-11-19 09:52:18,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:52:19,041 INFO L124 PetriNetUnfolderBase]: 201/351 cut-off events. [2024-11-19 09:52:19,042 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-19 09:52:19,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 669 conditions, 351 events. 201/351 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1200 event pairs, 124 based on Foata normal form. 0/320 useless extension candidates. Maximal degree in co-relation 647. Up to 298 conditions per place. [2024-11-19 09:52:19,044 INFO L140 encePairwiseOnDemand]: 36/41 looper letters, 23 selfloop transitions, 4 changer transitions 0/37 dead transitions. [2024-11-19 09:52:19,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 37 transitions, 140 flow [2024-11-19 09:52:19,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:52:19,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:52:19,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 88 transitions. [2024-11-19 09:52:19,049 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-11-19 09:52:19,049 INFO L175 Difference]: Start difference. First operand has 36 places, 34 transitions, 78 flow. Second operand 4 states and 88 transitions. [2024-11-19 09:52:19,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 37 transitions, 140 flow [2024-11-19 09:52:19,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 37 transitions, 134 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:52:19,052 INFO L231 Difference]: Finished difference. Result has 39 places, 37 transitions, 101 flow [2024-11-19 09:52:19,052 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=101, PETRI_PLACES=39, PETRI_TRANSITIONS=37} [2024-11-19 09:52:19,053 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, -4 predicate places. [2024-11-19 09:52:19,053 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 37 transitions, 101 flow [2024-11-19 09:52:19,053 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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) [2024-11-19 09:52:19,054 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:52:19,054 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-19 09:52:19,054 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-19 09:52:19,054 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:52:19,055 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:52:19,055 INFO L85 PathProgramCache]: Analyzing trace with hash 394503146, now seen corresponding path program 1 times [2024-11-19 09:52:19,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:52:19,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849355832] [2024-11-19 09:52:19,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:52:19,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:52:19,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:52:19,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:19,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:52:19,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849355832] [2024-11-19 09:52:19,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849355832] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:52:19,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833748593] [2024-11-19 09:52:19,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:52:19,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:52:19,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:52:19,277 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) [2024-11-19 09:52:19,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-19 09:52:19,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:52:19,335 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-19 09:52:19,339 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:52:19,392 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 [2024-11-19 09:52:19,572 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:19,572 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:52:19,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:19,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833748593] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:52:19,659 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:52:19,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-19 09:52:19,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542786364] [2024-11-19 09:52:19,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:52:19,659 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-19 09:52:19,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:52:19,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-19 09:52:19,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-19 09:52:19,744 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-11-19 09:52:19,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 37 transitions, 101 flow. Second operand has 11 states, 11 states have (on average 16.363636363636363) internal successors, (180), 11 states have internal predecessors, (180), 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) [2024-11-19 09:52:19,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:52:19,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-11-19 09:52:19,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:52:19,951 INFO L124 PetriNetUnfolderBase]: 202/353 cut-off events. [2024-11-19 09:52:19,952 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-19 09:52:19,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 685 conditions, 353 events. 202/353 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1213 event pairs, 124 based on Foata normal form. 0/321 useless extension candidates. Maximal degree in co-relation 654. Up to 295 conditions per place. [2024-11-19 09:52:19,956 INFO L140 encePairwiseOnDemand]: 36/41 looper letters, 19 selfloop transitions, 10 changer transitions 0/39 dead transitions. [2024-11-19 09:52:19,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 39 transitions, 167 flow [2024-11-19 09:52:19,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-19 09:52:19,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-19 09:52:19,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-11-19 09:52:19,958 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4603658536585366 [2024-11-19 09:52:19,958 INFO L175 Difference]: Start difference. First operand has 39 places, 37 transitions, 101 flow. Second operand 8 states and 151 transitions. [2024-11-19 09:52:19,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 39 transitions, 167 flow [2024-11-19 09:52:19,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 39 transitions, 164 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 09:52:19,960 INFO L231 Difference]: Finished difference. Result has 44 places, 39 transitions, 126 flow [2024-11-19 09:52:19,960 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=126, PETRI_PLACES=44, PETRI_TRANSITIONS=39} [2024-11-19 09:52:19,962 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 1 predicate places. [2024-11-19 09:52:19,963 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 39 transitions, 126 flow [2024-11-19 09:52:19,964 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 16.363636363636363) internal successors, (180), 11 states have internal predecessors, (180), 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) [2024-11-19 09:52:19,964 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:52:19,964 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-19 09:52:19,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-19 09:52:20,168 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 [2024-11-19 09:52:20,170 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:52:20,171 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:52:20,171 INFO L85 PathProgramCache]: Analyzing trace with hash -653285282, now seen corresponding path program 1 times [2024-11-19 09:52:20,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:52:20,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235417078] [2024-11-19 09:52:20,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:52:20,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:52:20,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:52:20,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:20,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:52:20,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235417078] [2024-11-19 09:52:20,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235417078] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:52:20,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:52:20,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:52:20,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704486421] [2024-11-19 09:52:20,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:52:20,226 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:52:20,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:52:20,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:52:20,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:52:20,249 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-11-19 09:52:20,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 39 transitions, 126 flow. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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) [2024-11-19 09:52:20,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:52:20,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-11-19 09:52:20,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:52:20,305 INFO L124 PetriNetUnfolderBase]: 202/336 cut-off events. [2024-11-19 09:52:20,306 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-19 09:52:20,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 676 conditions, 336 events. 202/336 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1042 event pairs, 124 based on Foata normal form. 0/321 useless extension candidates. Maximal degree in co-relation 638. Up to 294 conditions per place. [2024-11-19 09:52:20,308 INFO L140 encePairwiseOnDemand]: 36/41 looper letters, 25 selfloop transitions, 4 changer transitions 0/36 dead transitions. [2024-11-19 09:52:20,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 36 transitions, 178 flow [2024-11-19 09:52:20,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:52:20,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:52:20,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 74 transitions. [2024-11-19 09:52:20,309 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-11-19 09:52:20,309 INFO L175 Difference]: Start difference. First operand has 44 places, 39 transitions, 126 flow. Second operand 4 states and 74 transitions. [2024-11-19 09:52:20,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 36 transitions, 178 flow [2024-11-19 09:52:20,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 36 transitions, 136 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-11-19 09:52:20,311 INFO L231 Difference]: Finished difference. Result has 37 places, 36 transitions, 86 flow [2024-11-19 09:52:20,311 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=86, PETRI_PLACES=37, PETRI_TRANSITIONS=36} [2024-11-19 09:52:20,311 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, -6 predicate places. [2024-11-19 09:52:20,312 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 36 transitions, 86 flow [2024-11-19 09:52:20,312 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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) [2024-11-19 09:52:20,312 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:52:20,312 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-19 09:52:20,312 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-19 09:52:20,312 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:52:20,313 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:52:20,313 INFO L85 PathProgramCache]: Analyzing trace with hash -653285281, now seen corresponding path program 1 times [2024-11-19 09:52:20,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:52:20,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241381476] [2024-11-19 09:52:20,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:52:20,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:52:20,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:52:20,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:20,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:52:20,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241381476] [2024-11-19 09:52:20,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241381476] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:52:20,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:52:20,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 09:52:20,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448818910] [2024-11-19 09:52:20,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:52:20,375 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:52:20,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:52:20,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:52:20,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:52:20,387 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-11-19 09:52:20,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 36 transitions, 86 flow. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:20,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:52:20,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-11-19 09:52:20,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:52:20,516 INFO L124 PetriNetUnfolderBase]: 433/716 cut-off events. [2024-11-19 09:52:20,516 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-19 09:52:20,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1404 conditions, 716 events. 433/716 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2755 event pairs, 248 based on Foata normal form. 0/682 useless extension candidates. Maximal degree in co-relation 813. Up to 384 conditions per place. [2024-11-19 09:52:20,521 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 54 selfloop transitions, 5 changer transitions 0/65 dead transitions. [2024-11-19 09:52:20,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 65 transitions, 270 flow [2024-11-19 09:52:20,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:52:20,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:52:20,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2024-11-19 09:52:20,524 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6439024390243903 [2024-11-19 09:52:20,524 INFO L175 Difference]: Start difference. First operand has 37 places, 36 transitions, 86 flow. Second operand 5 states and 132 transitions. [2024-11-19 09:52:20,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 65 transitions, 270 flow [2024-11-19 09:52:20,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 65 transitions, 265 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:52:20,525 INFO L231 Difference]: Finished difference. Result has 41 places, 38 transitions, 106 flow [2024-11-19 09:52:20,526 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=106, PETRI_PLACES=41, PETRI_TRANSITIONS=38} [2024-11-19 09:52:20,526 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, -2 predicate places. [2024-11-19 09:52:20,526 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 38 transitions, 106 flow [2024-11-19 09:52:20,527 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:20,527 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:52:20,527 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:52:20,527 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-19 09:52:20,527 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:52:20,527 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:52:20,527 INFO L85 PathProgramCache]: Analyzing trace with hash -751478171, now seen corresponding path program 1 times [2024-11-19 09:52:20,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:52:20,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467018973] [2024-11-19 09:52:20,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:52:20,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:52:20,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:52:20,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:20,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:52:20,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467018973] [2024-11-19 09:52:20,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467018973] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:52:20,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:52:20,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 09:52:20,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557997566] [2024-11-19 09:52:20,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:52:20,583 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:52:20,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:52:20,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:52:20,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:52:20,602 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-11-19 09:52:20,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 38 transitions, 106 flow. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 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) [2024-11-19 09:52:20,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:52:20,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-11-19 09:52:20,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:52:20,716 INFO L124 PetriNetUnfolderBase]: 410/680 cut-off events. [2024-11-19 09:52:20,716 INFO L125 PetriNetUnfolderBase]: For 222/253 co-relation queries the response was YES. [2024-11-19 09:52:20,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1523 conditions, 680 events. 410/680 cut-off events. For 222/253 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2583 event pairs, 248 based on Foata normal form. 0/644 useless extension candidates. Maximal degree in co-relation 900. Up to 389 conditions per place. [2024-11-19 09:52:20,721 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 51 selfloop transitions, 5 changer transitions 0/62 dead transitions. [2024-11-19 09:52:20,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 62 transitions, 282 flow [2024-11-19 09:52:20,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:52:20,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:52:20,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-11-19 09:52:20,724 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6292682926829268 [2024-11-19 09:52:20,724 INFO L175 Difference]: Start difference. First operand has 41 places, 38 transitions, 106 flow. Second operand 5 states and 129 transitions. [2024-11-19 09:52:20,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 62 transitions, 282 flow [2024-11-19 09:52:20,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 62 transitions, 277 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:52:20,727 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 126 flow [2024-11-19 09:52:20,727 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=126, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2024-11-19 09:52:20,728 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 2 predicate places. [2024-11-19 09:52:20,729 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 126 flow [2024-11-19 09:52:20,729 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 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) [2024-11-19 09:52:20,729 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:52:20,729 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:52:20,729 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-19 09:52:20,729 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:52:20,730 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:52:20,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1615111737, now seen corresponding path program 1 times [2024-11-19 09:52:20,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:52:20,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160165426] [2024-11-19 09:52:20,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:52:20,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:52:20,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:52:20,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:20,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:52:20,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160165426] [2024-11-19 09:52:20,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160165426] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:52:20,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384907732] [2024-11-19 09:52:20,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:52:20,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:52:20,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:52:20,856 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) [2024-11-19 09:52:20,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-19 09:52:20,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:52:20,926 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-19 09:52:20,927 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:52:20,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:20,997 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:52:21,033 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 22 treesize of output 18 [2024-11-19 09:52:21,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:21,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384907732] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:52:21,044 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:52:21,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-11-19 09:52:21,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950712967] [2024-11-19 09:52:21,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:52:21,045 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-19 09:52:21,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:52:21,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-19 09:52:21,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-19 09:52:21,177 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-11-19 09:52:21,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 40 transitions, 126 flow. Second operand has 11 states, 11 states have (on average 16.454545454545453) internal successors, (181), 11 states have internal predecessors, (181), 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) [2024-11-19 09:52:21,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:52:21,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-11-19 09:52:21,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:52:21,410 INFO L124 PetriNetUnfolderBase]: 491/823 cut-off events. [2024-11-19 09:52:21,411 INFO L125 PetriNetUnfolderBase]: For 418/470 co-relation queries the response was YES. [2024-11-19 09:52:21,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2018 conditions, 823 events. 491/823 cut-off events. For 418/470 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3411 event pairs, 293 based on Foata normal form. 0/781 useless extension candidates. Maximal degree in co-relation 1278. Up to 404 conditions per place. [2024-11-19 09:52:21,415 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 52 selfloop transitions, 8 changer transitions 0/66 dead transitions. [2024-11-19 09:52:21,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 66 transitions, 312 flow [2024-11-19 09:52:21,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 09:52:21,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 09:52:21,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-11-19 09:52:21,417 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6016260162601627 [2024-11-19 09:52:21,417 INFO L175 Difference]: Start difference. First operand has 45 places, 40 transitions, 126 flow. Second operand 6 states and 148 transitions. [2024-11-19 09:52:21,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 66 transitions, 312 flow [2024-11-19 09:52:21,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 66 transitions, 307 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:52:21,419 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 152 flow [2024-11-19 09:52:21,419 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=152, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2024-11-19 09:52:21,420 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 6 predicate places. [2024-11-19 09:52:21,420 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 152 flow [2024-11-19 09:52:21,420 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 16.454545454545453) internal successors, (181), 11 states have internal predecessors, (181), 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) [2024-11-19 09:52:21,420 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:52:21,421 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:52:21,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-19 09:52:21,621 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-19 09:52:21,622 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:52:21,622 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:52:21,622 INFO L85 PathProgramCache]: Analyzing trace with hash -621989837, now seen corresponding path program 1 times [2024-11-19 09:52:21,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:52:21,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743654701] [2024-11-19 09:52:21,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:52:21,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:52:21,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:52:21,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:21,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:52:21,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743654701] [2024-11-19 09:52:21,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743654701] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:52:21,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:52:21,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 09:52:21,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604986813] [2024-11-19 09:52:21,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:52:21,680 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:52:21,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:52:21,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:52:21,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:52:21,694 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-11-19 09:52:21,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 152 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:21,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:52:21,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-11-19 09:52:21,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:52:21,804 INFO L124 PetriNetUnfolderBase]: 483/777 cut-off events. [2024-11-19 09:52:21,804 INFO L125 PetriNetUnfolderBase]: For 923/1094 co-relation queries the response was YES. [2024-11-19 09:52:21,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2188 conditions, 777 events. 483/777 cut-off events. For 923/1094 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2974 event pairs, 306 based on Foata normal form. 0/743 useless extension candidates. Maximal degree in co-relation 1492. Up to 511 conditions per place. [2024-11-19 09:52:21,823 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 50 selfloop transitions, 5 changer transitions 0/61 dead transitions. [2024-11-19 09:52:21,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 61 transitions, 324 flow [2024-11-19 09:52:21,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:52:21,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:52:21,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-11-19 09:52:21,824 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6146341463414634 [2024-11-19 09:52:21,825 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 152 flow. Second operand 5 states and 126 transitions. [2024-11-19 09:52:21,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 61 transitions, 324 flow [2024-11-19 09:52:21,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 61 transitions, 309 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-19 09:52:21,826 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 164 flow [2024-11-19 09:52:21,827 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=164, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2024-11-19 09:52:21,827 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2024-11-19 09:52:21,827 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 164 flow [2024-11-19 09:52:21,827 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:21,828 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:52:21,828 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:52:21,828 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-19 09:52:21,828 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:52:21,828 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:52:21,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1629637055, now seen corresponding path program 1 times [2024-11-19 09:52:21,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:52:21,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339525619] [2024-11-19 09:52:21,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:52:21,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:52:21,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:52:21,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:21,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:52:21,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339525619] [2024-11-19 09:52:21,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339525619] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:52:21,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740904880] [2024-11-19 09:52:21,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:52:21,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:52:21,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:52:21,940 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) [2024-11-19 09:52:21,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-19 09:52:21,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:52:21,989 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-19 09:52:21,990 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:52:22,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:22,048 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:52:22,083 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 22 treesize of output 18 [2024-11-19 09:52:22,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:22,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740904880] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:52:22,090 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:52:22,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-11-19 09:52:22,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085885294] [2024-11-19 09:52:22,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:52:22,091 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-19 09:52:22,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:52:22,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-19 09:52:22,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-19 09:52:22,186 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-11-19 09:52:22,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 164 flow. Second operand has 11 states, 11 states have (on average 16.818181818181817) internal successors, (185), 11 states have internal predecessors, (185), 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) [2024-11-19 09:52:22,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:52:22,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-11-19 09:52:22,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:52:22,394 INFO L124 PetriNetUnfolderBase]: 625/1028 cut-off events. [2024-11-19 09:52:22,394 INFO L125 PetriNetUnfolderBase]: For 1053/1271 co-relation queries the response was YES. [2024-11-19 09:52:22,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2928 conditions, 1028 events. 625/1028 cut-off events. For 1053/1271 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 4488 event pairs, 358 based on Foata normal form. 0/985 useless extension candidates. Maximal degree in co-relation 2185. Up to 564 conditions per place. [2024-11-19 09:52:22,401 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 54 selfloop transitions, 8 changer transitions 0/68 dead transitions. [2024-11-19 09:52:22,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 68 transitions, 367 flow [2024-11-19 09:52:22,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 09:52:22,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 09:52:22,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-11-19 09:52:22,402 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2024-11-19 09:52:22,402 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 164 flow. Second operand 6 states and 146 transitions. [2024-11-19 09:52:22,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 68 transitions, 367 flow [2024-11-19 09:52:22,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 68 transitions, 362 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:52:22,405 INFO L231 Difference]: Finished difference. Result has 55 places, 46 transitions, 190 flow [2024-11-19 09:52:22,405 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=190, PETRI_PLACES=55, PETRI_TRANSITIONS=46} [2024-11-19 09:52:22,406 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 12 predicate places. [2024-11-19 09:52:22,406 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 46 transitions, 190 flow [2024-11-19 09:52:22,406 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 16.818181818181817) internal successors, (185), 11 states have internal predecessors, (185), 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) [2024-11-19 09:52:22,406 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:52:22,407 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:52:22,421 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-19 09:52:22,607 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:52:22,608 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:52:22,608 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:52:22,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1639198813, now seen corresponding path program 1 times [2024-11-19 09:52:22,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:52:22,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532429311] [2024-11-19 09:52:22,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:52:22,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:52:22,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:52:22,705 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:22,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:52:22,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532429311] [2024-11-19 09:52:22,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532429311] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:52:22,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780436240] [2024-11-19 09:52:22,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:52:22,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:52:22,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:52:22,707 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) [2024-11-19 09:52:22,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-19 09:52:22,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:52:22,764 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 09:52:22,765 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:52:22,822 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:22,822 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:52:22,866 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:22,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780436240] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:52:22,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:52:22,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-19 09:52:22,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414801571] [2024-11-19 09:52:22,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:52:22,867 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-19 09:52:22,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:52:22,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-19 09:52:22,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-11-19 09:52:22,910 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-11-19 09:52:22,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 46 transitions, 190 flow. Second operand has 14 states, 14 states have (on average 16.714285714285715) internal successors, (234), 14 states have internal predecessors, (234), 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) [2024-11-19 09:52:22,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:52:22,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-11-19 09:52:22,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:52:23,181 INFO L124 PetriNetUnfolderBase]: 1167/1863 cut-off events. [2024-11-19 09:52:23,181 INFO L125 PetriNetUnfolderBase]: For 2238/2543 co-relation queries the response was YES. [2024-11-19 09:52:23,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5842 conditions, 1863 events. 1167/1863 cut-off events. For 2238/2543 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 8857 event pairs, 547 based on Foata normal form. 34/1893 useless extension candidates. Maximal degree in co-relation 3771. Up to 806 conditions per place. [2024-11-19 09:52:23,194 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 80 selfloop transitions, 13 changer transitions 0/99 dead transitions. [2024-11-19 09:52:23,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 99 transitions, 594 flow [2024-11-19 09:52:23,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-19 09:52:23,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-19 09:52:23,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-11-19 09:52:23,196 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-11-19 09:52:23,196 INFO L175 Difference]: Start difference. First operand has 55 places, 46 transitions, 190 flow. Second operand 8 states and 194 transitions. [2024-11-19 09:52:23,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 99 transitions, 594 flow [2024-11-19 09:52:23,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 99 transitions, 573 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-11-19 09:52:23,200 INFO L231 Difference]: Finished difference. Result has 61 places, 50 transitions, 250 flow [2024-11-19 09:52:23,201 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=250, PETRI_PLACES=61, PETRI_TRANSITIONS=50} [2024-11-19 09:52:23,201 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 18 predicate places. [2024-11-19 09:52:23,201 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 50 transitions, 250 flow [2024-11-19 09:52:23,201 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 16.714285714285715) internal successors, (234), 14 states have internal predecessors, (234), 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) [2024-11-19 09:52:23,202 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:52:23,202 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:52:23,214 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-19 09:52:23,402 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:52:23,403 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:52:23,404 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:52:23,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1587826419, now seen corresponding path program 1 times [2024-11-19 09:52:23,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:52:23,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474410501] [2024-11-19 09:52:23,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:52:23,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:52:23,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:52:23,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:23,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:52:23,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474410501] [2024-11-19 09:52:23,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474410501] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:52:23,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311926188] [2024-11-19 09:52:23,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:52:23,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:52:23,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:52:23,583 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) [2024-11-19 09:52:23,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-19 09:52:23,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:52:23,639 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-19 09:52:23,640 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:52:23,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:23,758 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 09:52:23,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311926188] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:52:23,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-19 09:52:23,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 10 [2024-11-19 09:52:23,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357171839] [2024-11-19 09:52:23,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:52:23,759 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-19 09:52:23,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:52:23,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-19 09:52:23,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-11-19 09:52:23,834 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-11-19 09:52:23,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 50 transitions, 250 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 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) [2024-11-19 09:52:23,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:52:23,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-11-19 09:52:23,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:52:24,065 INFO L124 PetriNetUnfolderBase]: 1113/1703 cut-off events. [2024-11-19 09:52:24,065 INFO L125 PetriNetUnfolderBase]: For 4398/4878 co-relation queries the response was YES. [2024-11-19 09:52:24,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6102 conditions, 1703 events. 1113/1703 cut-off events. For 4398/4878 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 7601 event pairs, 409 based on Foata normal form. 0/1620 useless extension candidates. Maximal degree in co-relation 4222. Up to 896 conditions per place. [2024-11-19 09:52:24,074 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 72 selfloop transitions, 10 changer transitions 0/87 dead transitions. [2024-11-19 09:52:24,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 87 transitions, 658 flow [2024-11-19 09:52:24,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 09:52:24,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 09:52:24,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 127 transitions. [2024-11-19 09:52:24,076 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.516260162601626 [2024-11-19 09:52:24,076 INFO L175 Difference]: Start difference. First operand has 61 places, 50 transitions, 250 flow. Second operand 6 states and 127 transitions. [2024-11-19 09:52:24,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 87 transitions, 658 flow [2024-11-19 09:52:24,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 87 transitions, 634 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-11-19 09:52:24,079 INFO L231 Difference]: Finished difference. Result has 61 places, 49 transitions, 252 flow [2024-11-19 09:52:24,080 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=252, PETRI_PLACES=61, PETRI_TRANSITIONS=49} [2024-11-19 09:52:24,080 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 18 predicate places. [2024-11-19 09:52:24,080 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 49 transitions, 252 flow [2024-11-19 09:52:24,080 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 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) [2024-11-19 09:52:24,080 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:52:24,081 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:52:24,094 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-19 09:52:24,281 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,SelfDestructingSolverStorable10 [2024-11-19 09:52:24,282 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:52:24,282 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:52:24,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1581839581, now seen corresponding path program 1 times [2024-11-19 09:52:24,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:52:24,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751094512] [2024-11-19 09:52:24,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:52:24,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:52:24,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:52:24,352 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:24,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:52:24,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751094512] [2024-11-19 09:52:24,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751094512] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:52:24,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155641209] [2024-11-19 09:52:24,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:52:24,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:52:24,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:52:24,354 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) [2024-11-19 09:52:24,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-19 09:52:24,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:52:24,414 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-19 09:52:24,415 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:52:24,486 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:24,487 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:52:24,535 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:24,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155641209] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:52:24,536 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:52:24,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2024-11-19 09:52:24,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992733154] [2024-11-19 09:52:24,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:52:24,536 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-19 09:52:24,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:52:24,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-19 09:52:24,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2024-11-19 09:52:24,592 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-11-19 09:52:24,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 49 transitions, 252 flow. Second operand has 15 states, 15 states have (on average 16.933333333333334) internal successors, (254), 15 states have internal predecessors, (254), 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) [2024-11-19 09:52:24,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:52:24,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-11-19 09:52:24,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:52:24,903 INFO L124 PetriNetUnfolderBase]: 1136/1733 cut-off events. [2024-11-19 09:52:24,903 INFO L125 PetriNetUnfolderBase]: For 4695/5195 co-relation queries the response was YES. [2024-11-19 09:52:24,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6452 conditions, 1733 events. 1136/1733 cut-off events. For 4695/5195 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 7482 event pairs, 544 based on Foata normal form. 35/1765 useless extension candidates. Maximal degree in co-relation 4569. Up to 816 conditions per place. [2024-11-19 09:52:24,915 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 75 selfloop transitions, 13 changer transitions 0/93 dead transitions. [2024-11-19 09:52:24,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 93 transitions, 653 flow [2024-11-19 09:52:24,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-19 09:52:24,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-19 09:52:24,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-11-19 09:52:24,916 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-11-19 09:52:24,916 INFO L175 Difference]: Start difference. First operand has 61 places, 49 transitions, 252 flow. Second operand 8 states and 192 transitions. [2024-11-19 09:52:24,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 93 transitions, 653 flow [2024-11-19 09:52:24,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 93 transitions, 611 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-19 09:52:24,922 INFO L231 Difference]: Finished difference. Result has 66 places, 53 transitions, 305 flow [2024-11-19 09:52:24,922 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=305, PETRI_PLACES=66, PETRI_TRANSITIONS=53} [2024-11-19 09:52:24,923 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 23 predicate places. [2024-11-19 09:52:24,924 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 53 transitions, 305 flow [2024-11-19 09:52:24,924 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 16.933333333333334) internal successors, (254), 15 states have internal predecessors, (254), 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) [2024-11-19 09:52:24,924 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:52:24,924 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-19 09:52:24,937 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-19 09:52:25,125 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:52:25,125 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:52:25,126 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:52:25,126 INFO L85 PathProgramCache]: Analyzing trace with hash 673362231, now seen corresponding path program 2 times [2024-11-19 09:52:25,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:52:25,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646732533] [2024-11-19 09:52:25,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:52:25,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:52:25,143 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:52:25,143 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:52:25,305 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:52:25,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:52:25,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646732533] [2024-11-19 09:52:25,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646732533] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:52:25,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984678977] [2024-11-19 09:52:25,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:52:25,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:52:25,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:52:25,307 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) [2024-11-19 09:52:25,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-19 09:52:25,358 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:52:25,359 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:52:25,360 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-19 09:52:25,361 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:52:25,367 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 [2024-11-19 09:52:25,568 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 09:52:25,568 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:52:25,738 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 09:52:25,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984678977] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:52:25,738 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:52:25,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2024-11-19 09:52:25,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632344854] [2024-11-19 09:52:25,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:52:25,739 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-19 09:52:25,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:52:25,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-19 09:52:25,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2024-11-19 09:52:26,098 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-11-19 09:52:26,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 53 transitions, 305 flow. Second operand has 18 states, 18 states have (on average 15.722222222222221) internal successors, (283), 18 states have internal predecessors, (283), 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) [2024-11-19 09:52:26,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:52:26,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-11-19 09:52:26,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:52:26,749 INFO L124 PetriNetUnfolderBase]: 1441/2193 cut-off events. [2024-11-19 09:52:26,749 INFO L125 PetriNetUnfolderBase]: For 5886/6284 co-relation queries the response was YES. [2024-11-19 09:52:26,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8522 conditions, 2193 events. 1441/2193 cut-off events. For 5886/6284 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 10306 event pairs, 240 based on Foata normal form. 0/2189 useless extension candidates. Maximal degree in co-relation 5462. Up to 538 conditions per place. [2024-11-19 09:52:26,763 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 122 selfloop transitions, 23 changer transitions 0/149 dead transitions. [2024-11-19 09:52:26,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 149 transitions, 1135 flow [2024-11-19 09:52:26,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 09:52:26,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-19 09:52:26,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-11-19 09:52:26,765 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5826558265582655 [2024-11-19 09:52:26,766 INFO L175 Difference]: Start difference. First operand has 66 places, 53 transitions, 305 flow. Second operand 9 states and 215 transitions. [2024-11-19 09:52:26,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 149 transitions, 1135 flow [2024-11-19 09:52:26,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 149 transitions, 1103 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-11-19 09:52:26,772 INFO L231 Difference]: Finished difference. Result has 70 places, 60 transitions, 406 flow [2024-11-19 09:52:26,772 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=406, PETRI_PLACES=70, PETRI_TRANSITIONS=60} [2024-11-19 09:52:26,773 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 27 predicate places. [2024-11-19 09:52:26,773 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 60 transitions, 406 flow [2024-11-19 09:52:26,773 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 15.722222222222221) internal successors, (283), 18 states have internal predecessors, (283), 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) [2024-11-19 09:52:26,773 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:52:26,773 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:52:26,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-19 09:52:26,977 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:52:26,978 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:52:26,978 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:52:26,978 INFO L85 PathProgramCache]: Analyzing trace with hash -2037858947, now seen corresponding path program 2 times [2024-11-19 09:52:26,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:52:26,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273647770] [2024-11-19 09:52:26,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:52:26,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:52:26,988 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:52:26,988 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:52:27,132 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:52:27,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:52:27,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273647770] [2024-11-19 09:52:27,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273647770] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:52:27,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744636930] [2024-11-19 09:52:27,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:52:27,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:52:27,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:52:27,134 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) [2024-11-19 09:52:27,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-19 09:52:27,184 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:52:27,184 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:52:27,185 INFO L255 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-19 09:52:27,186 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:52:27,281 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:27,281 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:52:27,362 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 24 treesize of output 20 [2024-11-19 09:52:27,404 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:27,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744636930] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:52:27,404 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:52:27,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2024-11-19 09:52:27,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626883196] [2024-11-19 09:52:27,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:52:27,404 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-19 09:52:27,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:52:27,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-19 09:52:27,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2024-11-19 09:52:27,770 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-11-19 09:52:27,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 60 transitions, 406 flow. Second operand has 20 states, 20 states have (on average 16.05) internal successors, (321), 20 states have internal predecessors, (321), 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) [2024-11-19 09:52:27,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:52:27,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-11-19 09:52:27,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:52:28,642 INFO L124 PetriNetUnfolderBase]: 2173/3193 cut-off events. [2024-11-19 09:52:28,642 INFO L125 PetriNetUnfolderBase]: For 11387/11927 co-relation queries the response was YES. [2024-11-19 09:52:28,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13511 conditions, 3193 events. 2173/3193 cut-off events. For 11387/11927 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 14398 event pairs, 408 based on Foata normal form. 186/3373 useless extension candidates. Maximal degree in co-relation 7917. Up to 662 conditions per place. [2024-11-19 09:52:28,660 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 146 selfloop transitions, 29 changer transitions 0/180 dead transitions. [2024-11-19 09:52:28,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 180 transitions, 1482 flow [2024-11-19 09:52:28,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-19 09:52:28,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-19 09:52:28,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 327 transitions. [2024-11-19 09:52:28,662 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5696864111498258 [2024-11-19 09:52:28,662 INFO L175 Difference]: Start difference. First operand has 70 places, 60 transitions, 406 flow. Second operand 14 states and 327 transitions. [2024-11-19 09:52:28,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 180 transitions, 1482 flow [2024-11-19 09:52:28,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 180 transitions, 1362 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-11-19 09:52:28,673 INFO L231 Difference]: Finished difference. Result has 80 places, 68 transitions, 508 flow [2024-11-19 09:52:28,673 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=363, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=508, PETRI_PLACES=80, PETRI_TRANSITIONS=68} [2024-11-19 09:52:28,674 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 37 predicate places. [2024-11-19 09:52:28,674 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 68 transitions, 508 flow [2024-11-19 09:52:28,674 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 16.05) internal successors, (321), 20 states have internal predecessors, (321), 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) [2024-11-19 09:52:28,674 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:52:28,674 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:52:28,687 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-19 09:52:28,875 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,SelfDestructingSolverStorable13 [2024-11-19 09:52:28,875 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:52:28,875 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:52:28,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1182345950, now seen corresponding path program 1 times [2024-11-19 09:52:28,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:52:28,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443495068] [2024-11-19 09:52:28,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:52:28,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:52:28,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:52:28,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:28,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:52:28,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443495068] [2024-11-19 09:52:28,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443495068] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:52:28,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:52:28,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:52:28,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889332421] [2024-11-19 09:52:28,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:52:28,997 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:52:28,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:52:28,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:52:28,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:52:28,997 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-11-19 09:52:28,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 68 transitions, 508 flow. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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) [2024-11-19 09:52:28,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:52:28,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-11-19 09:52:28,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:52:29,217 INFO L124 PetriNetUnfolderBase]: 2011/3154 cut-off events. [2024-11-19 09:52:29,218 INFO L125 PetriNetUnfolderBase]: For 13312/13695 co-relation queries the response was YES. [2024-11-19 09:52:29,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14319 conditions, 3154 events. 2011/3154 cut-off events. For 13312/13695 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 16025 event pairs, 470 based on Foata normal form. 59/3161 useless extension candidates. Maximal degree in co-relation 11045. Up to 2119 conditions per place. [2024-11-19 09:52:29,236 INFO L140 encePairwiseOnDemand]: 36/41 looper letters, 69 selfloop transitions, 12 changer transitions 8/97 dead transitions. [2024-11-19 09:52:29,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 97 transitions, 914 flow [2024-11-19 09:52:29,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:52:29,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:52:29,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 89 transitions. [2024-11-19 09:52:29,237 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7235772357723578 [2024-11-19 09:52:29,237 INFO L175 Difference]: Start difference. First operand has 80 places, 68 transitions, 508 flow. Second operand 3 states and 89 transitions. [2024-11-19 09:52:29,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 97 transitions, 914 flow [2024-11-19 09:52:29,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 97 transitions, 803 flow, removed 19 selfloop flow, removed 10 redundant places. [2024-11-19 09:52:29,254 INFO L231 Difference]: Finished difference. Result has 73 places, 72 transitions, 523 flow [2024-11-19 09:52:29,255 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=427, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=523, PETRI_PLACES=73, PETRI_TRANSITIONS=72} [2024-11-19 09:52:29,255 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 30 predicate places. [2024-11-19 09:52:29,255 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 72 transitions, 523 flow [2024-11-19 09:52:29,255 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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) [2024-11-19 09:52:29,255 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:52:29,255 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:52:29,256 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-19 09:52:29,256 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:52:29,256 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:52:29,256 INFO L85 PathProgramCache]: Analyzing trace with hash -343284578, now seen corresponding path program 1 times [2024-11-19 09:52:29,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:52:29,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797471004] [2024-11-19 09:52:29,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:52:29,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:52:29,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:52:29,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:52:29,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:52:29,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797471004] [2024-11-19 09:52:29,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797471004] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:52:29,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621652285] [2024-11-19 09:52:29,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:52:29,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:52:29,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:52:29,313 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) [2024-11-19 09:52:29,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-19 09:52:29,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:52:29,368 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-19 09:52:29,369 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:52:29,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:52:29,396 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:52:29,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:52:29,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621652285] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 09:52:29,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-19 09:52:29,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2024-11-19 09:52:29,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81845885] [2024-11-19 09:52:29,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:52:29,426 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:52:29,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:52:29,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:52:29,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-11-19 09:52:29,434 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-11-19 09:52:29,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 72 transitions, 523 flow. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 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) [2024-11-19 09:52:29,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:52:29,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-11-19 09:52:29,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:52:29,650 INFO L124 PetriNetUnfolderBase]: 1759/2608 cut-off events. [2024-11-19 09:52:29,650 INFO L125 PetriNetUnfolderBase]: For 8518/8944 co-relation queries the response was YES. [2024-11-19 09:52:29,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10761 conditions, 2608 events. 1759/2608 cut-off events. For 8518/8944 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 12661 event pairs, 479 based on Foata normal form. 311/2801 useless extension candidates. Maximal degree in co-relation 7013. Up to 1254 conditions per place. [2024-11-19 09:52:29,664 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 76 selfloop transitions, 12 changer transitions 0/93 dead transitions. [2024-11-19 09:52:29,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 93 transitions, 827 flow [2024-11-19 09:52:29,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:52:29,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:52:29,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 113 transitions. [2024-11-19 09:52:29,665 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.551219512195122 [2024-11-19 09:52:29,665 INFO L175 Difference]: Start difference. First operand has 73 places, 72 transitions, 523 flow. Second operand 5 states and 113 transitions. [2024-11-19 09:52:29,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 93 transitions, 827 flow [2024-11-19 09:52:29,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 93 transitions, 713 flow, removed 17 selfloop flow, removed 9 redundant places. [2024-11-19 09:52:29,678 INFO L231 Difference]: Finished difference. Result has 61 places, 68 transitions, 425 flow [2024-11-19 09:52:29,678 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=401, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=425, PETRI_PLACES=61, PETRI_TRANSITIONS=68} [2024-11-19 09:52:29,678 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 18 predicate places. [2024-11-19 09:52:29,678 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 68 transitions, 425 flow [2024-11-19 09:52:29,679 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 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) [2024-11-19 09:52:29,679 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:52:29,679 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:52:29,693 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-19 09:52:29,882 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 [2024-11-19 09:52:29,883 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:52:29,883 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:52:29,883 INFO L85 PathProgramCache]: Analyzing trace with hash -934982250, now seen corresponding path program 1 times [2024-11-19 09:52:29,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:52:29,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834377104] [2024-11-19 09:52:29,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:52:29,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:52:29,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:52:29,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:29,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:52:29,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834377104] [2024-11-19 09:52:29,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834377104] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:52:29,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120876088] [2024-11-19 09:52:29,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:52:29,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:52:29,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:52:29,964 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) [2024-11-19 09:52:29,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-19 09:52:30,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:52:30,022 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 09:52:30,023 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:52:30,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:30,078 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:52:30,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:30,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120876088] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:52:30,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:52:30,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2024-11-19 09:52:30,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473930001] [2024-11-19 09:52:30,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:52:30,124 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-19 09:52:30,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:52:30,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-19 09:52:30,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-11-19 09:52:30,190 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-11-19 09:52:30,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 68 transitions, 425 flow. Second operand has 14 states, 14 states have (on average 16.571428571428573) internal successors, (232), 14 states have internal predecessors, (232), 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) [2024-11-19 09:52:30,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:52:30,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-11-19 09:52:30,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:52:30,563 INFO L124 PetriNetUnfolderBase]: 2385/3525 cut-off events. [2024-11-19 09:52:30,564 INFO L125 PetriNetUnfolderBase]: For 8673/8764 co-relation queries the response was YES. [2024-11-19 09:52:30,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12712 conditions, 3525 events. 2385/3525 cut-off events. For 8673/8764 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 17411 event pairs, 618 based on Foata normal form. 0/3146 useless extension candidates. Maximal degree in co-relation 8360. Up to 1461 conditions per place. [2024-11-19 09:52:30,581 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 129 selfloop transitions, 54 changer transitions 0/187 dead transitions. [2024-11-19 09:52:30,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 187 transitions, 1639 flow [2024-11-19 09:52:30,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-19 09:52:30,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-19 09:52:30,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 256 transitions. [2024-11-19 09:52:30,582 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5203252032520326 [2024-11-19 09:52:30,582 INFO L175 Difference]: Start difference. First operand has 61 places, 68 transitions, 425 flow. Second operand 12 states and 256 transitions. [2024-11-19 09:52:30,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 187 transitions, 1639 flow [2024-11-19 09:52:30,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 187 transitions, 1531 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-19 09:52:30,592 INFO L231 Difference]: Finished difference. Result has 70 places, 96 transitions, 726 flow [2024-11-19 09:52:30,592 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=401, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=726, PETRI_PLACES=70, PETRI_TRANSITIONS=96} [2024-11-19 09:52:30,593 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 27 predicate places. [2024-11-19 09:52:30,593 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 96 transitions, 726 flow [2024-11-19 09:52:30,593 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 16.571428571428573) internal successors, (232), 14 states have internal predecessors, (232), 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) [2024-11-19 09:52:30,593 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:52:30,593 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:52:30,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-19 09:52:30,793 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 [2024-11-19 09:52:30,794 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:52:30,794 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:52:30,794 INFO L85 PathProgramCache]: Analyzing trace with hash 463335020, now seen corresponding path program 2 times [2024-11-19 09:52:30,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:52:30,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103539406] [2024-11-19 09:52:30,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:52:30,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:52:30,803 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:52:30,803 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:52:30,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:52:30,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:52:30,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103539406] [2024-11-19 09:52:30,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103539406] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:52:30,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874343508] [2024-11-19 09:52:30,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:52:30,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:52:30,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:52:30,870 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) [2024-11-19 09:52:30,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-19 09:52:30,933 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:52:30,933 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:52:30,934 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 09:52:30,935 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:52:30,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:52:30,980 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:52:31,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:52:31,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874343508] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 09:52:31,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-19 09:52:31,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2024-11-19 09:52:31,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163553684] [2024-11-19 09:52:31,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:52:31,034 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-19 09:52:31,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:52:31,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-19 09:52:31,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-11-19 09:52:31,049 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-11-19 09:52:31,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 96 transitions, 726 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 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) [2024-11-19 09:52:31,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:52:31,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-11-19 09:52:31,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:52:31,407 INFO L124 PetriNetUnfolderBase]: 3018/4472 cut-off events. [2024-11-19 09:52:31,407 INFO L125 PetriNetUnfolderBase]: For 10577/10706 co-relation queries the response was YES. [2024-11-19 09:52:31,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16951 conditions, 4472 events. 3018/4472 cut-off events. For 10577/10706 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 22499 event pairs, 678 based on Foata normal form. 23/4402 useless extension candidates. Maximal degree in co-relation 11874. Up to 1672 conditions per place. [2024-11-19 09:52:31,456 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 129 selfloop transitions, 88 changer transitions 0/221 dead transitions. [2024-11-19 09:52:31,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 221 transitions, 2040 flow [2024-11-19 09:52:31,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 09:52:31,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-19 09:52:31,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-11-19 09:52:31,458 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5447154471544715 [2024-11-19 09:52:31,458 INFO L175 Difference]: Start difference. First operand has 70 places, 96 transitions, 726 flow. Second operand 9 states and 201 transitions. [2024-11-19 09:52:31,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 221 transitions, 2040 flow [2024-11-19 09:52:31,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 221 transitions, 2032 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-19 09:52:31,473 INFO L231 Difference]: Finished difference. Result has 80 places, 140 transitions, 1443 flow [2024-11-19 09:52:31,473 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=718, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1443, PETRI_PLACES=80, PETRI_TRANSITIONS=140} [2024-11-19 09:52:31,474 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 37 predicate places. [2024-11-19 09:52:31,474 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 140 transitions, 1443 flow [2024-11-19 09:52:31,474 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 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) [2024-11-19 09:52:31,474 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:52:31,474 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:52:31,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-19 09:52:31,675 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 [2024-11-19 09:52:31,675 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:52:31,675 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:52:31,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1540256408, now seen corresponding path program 3 times [2024-11-19 09:52:31,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:52:31,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011436847] [2024-11-19 09:52:31,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 09:52:31,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:52:31,687 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-19 09:52:31,688 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:52:31,745 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:31,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:52:31,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011436847] [2024-11-19 09:52:31,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011436847] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:52:31,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749883637] [2024-11-19 09:52:31,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 09:52:31,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:52:31,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:52:31,747 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) [2024-11-19 09:52:31,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-19 09:52:31,805 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-19 09:52:31,805 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:52:31,806 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 09:52:31,807 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:52:31,876 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:31,876 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:52:31,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:31,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749883637] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:52:31,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:52:31,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2024-11-19 09:52:31,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384179020] [2024-11-19 09:52:31,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:52:31,926 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-19 09:52:31,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:52:31,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-19 09:52:31,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2024-11-19 09:52:31,977 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-11-19 09:52:31,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 140 transitions, 1443 flow. Second operand has 14 states, 14 states have (on average 16.642857142857142) internal successors, (233), 14 states have internal predecessors, (233), 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) [2024-11-19 09:52:31,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:52:31,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-11-19 09:52:31,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:52:32,664 INFO L124 PetriNetUnfolderBase]: 4007/5892 cut-off events. [2024-11-19 09:52:32,664 INFO L125 PetriNetUnfolderBase]: For 25392/25569 co-relation queries the response was YES. [2024-11-19 09:52:32,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28582 conditions, 5892 events. 4007/5892 cut-off events. For 25392/25569 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 30517 event pairs, 920 based on Foata normal form. 20/5909 useless extension candidates. Maximal degree in co-relation 22869. Up to 2621 conditions per place. [2024-11-19 09:52:32,694 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 173 selfloop transitions, 181 changer transitions 0/358 dead transitions. [2024-11-19 09:52:32,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 358 transitions, 4126 flow [2024-11-19 09:52:32,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-19 09:52:32,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-19 09:52:32,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 351 transitions. [2024-11-19 09:52:32,696 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5350609756097561 [2024-11-19 09:52:32,696 INFO L175 Difference]: Start difference. First operand has 80 places, 140 transitions, 1443 flow. Second operand 16 states and 351 transitions. [2024-11-19 09:52:32,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 358 transitions, 4126 flow [2024-11-19 09:52:32,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 358 transitions, 4103 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-11-19 09:52:32,764 INFO L231 Difference]: Finished difference. Result has 101 places, 237 transitions, 3285 flow [2024-11-19 09:52:32,765 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1432, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3285, PETRI_PLACES=101, PETRI_TRANSITIONS=237} [2024-11-19 09:52:32,765 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 58 predicate places. [2024-11-19 09:52:32,765 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 237 transitions, 3285 flow [2024-11-19 09:52:32,765 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 16.642857142857142) internal successors, (233), 14 states have internal predecessors, (233), 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) [2024-11-19 09:52:32,765 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:52:32,766 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:52:32,778 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-19 09:52:32,966 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 [2024-11-19 09:52:32,966 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:52:32,967 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:52:32,967 INFO L85 PathProgramCache]: Analyzing trace with hash 960606580, now seen corresponding path program 4 times [2024-11-19 09:52:32,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:52:32,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645027740] [2024-11-19 09:52:32,967 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 09:52:32,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:52:32,978 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 09:52:32,978 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:52:33,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:52:33,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:52:33,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645027740] [2024-11-19 09:52:33,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645027740] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:52:33,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815710268] [2024-11-19 09:52:33,016 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 09:52:33,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:52:33,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:52:33,017 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) [2024-11-19 09:52:33,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-19 09:52:33,070 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 09:52:33,071 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:52:33,071 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-19 09:52:33,072 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:52:33,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:52:33,116 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:52:33,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:52:33,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815710268] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:52:33,159 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:52:33,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-11-19 09:52:33,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335776193] [2024-11-19 09:52:33,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:52:33,159 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-19 09:52:33,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:52:33,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-19 09:52:33,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-11-19 09:52:33,194 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-11-19 09:52:33,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 237 transitions, 3285 flow. Second operand has 12 states, 12 states have (on average 15.5) internal successors, (186), 12 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:33,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:52:33,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-11-19 09:52:33,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:52:34,706 INFO L124 PetriNetUnfolderBase]: 6752/9743 cut-off events. [2024-11-19 09:52:34,706 INFO L125 PetriNetUnfolderBase]: For 61960/61960 co-relation queries the response was YES. [2024-11-19 09:52:34,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55042 conditions, 9743 events. 6752/9743 cut-off events. For 61960/61960 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 52762 event pairs, 221 based on Foata normal form. 18/9477 useless extension candidates. Maximal degree in co-relation 51731. Up to 2134 conditions per place. [2024-11-19 09:52:34,759 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 495 selfloop transitions, 597 changer transitions 0/1093 dead transitions. [2024-11-19 09:52:34,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 1093 transitions, 15699 flow [2024-11-19 09:52:34,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-19 09:52:34,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-11-19 09:52:34,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 732 transitions. [2024-11-19 09:52:34,761 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5101045296167247 [2024-11-19 09:52:34,761 INFO L175 Difference]: Start difference. First operand has 101 places, 237 transitions, 3285 flow. Second operand 35 states and 732 transitions. [2024-11-19 09:52:34,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 1093 transitions, 15699 flow [2024-11-19 09:52:35,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 1093 transitions, 14848 flow, removed 156 selfloop flow, removed 6 redundant places. [2024-11-19 09:52:35,104 INFO L231 Difference]: Finished difference. Result has 157 places, 723 transitions, 11574 flow [2024-11-19 09:52:35,104 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3086, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=11574, PETRI_PLACES=157, PETRI_TRANSITIONS=723} [2024-11-19 09:52:35,104 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 114 predicate places. [2024-11-19 09:52:35,104 INFO L471 AbstractCegarLoop]: Abstraction has has 157 places, 723 transitions, 11574 flow [2024-11-19 09:52:35,104 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 15.5) internal successors, (186), 12 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:35,105 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:52:35,105 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:52:35,117 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-19 09:52:35,307 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 [2024-11-19 09:52:35,308 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:52:35,308 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:52:35,308 INFO L85 PathProgramCache]: Analyzing trace with hash 2130354574, now seen corresponding path program 5 times [2024-11-19 09:52:35,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:52:35,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478554074] [2024-11-19 09:52:35,308 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 09:52:35,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:52:35,318 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:52:35,319 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:52:35,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:52:35,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:52:35,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478554074] [2024-11-19 09:52:35,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478554074] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:52:35,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:52:35,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-19 09:52:35,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744364415] [2024-11-19 09:52:35,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:52:35,373 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-19 09:52:35,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:52:35,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-19 09:52:35,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-19 09:52:35,400 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-11-19 09:52:35,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 723 transitions, 11574 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 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) [2024-11-19 09:52:35,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:52:35,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-11-19 09:52:35,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:52:37,064 INFO L124 PetriNetUnfolderBase]: 6683/9827 cut-off events. [2024-11-19 09:52:37,064 INFO L125 PetriNetUnfolderBase]: For 110338/110779 co-relation queries the response was YES. [2024-11-19 09:52:37,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66042 conditions, 9827 events. 6683/9827 cut-off events. For 110338/110779 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 54850 event pairs, 1558 based on Foata normal form. 261/9985 useless extension candidates. Maximal degree in co-relation 65261. Up to 5929 conditions per place. [2024-11-19 09:52:37,148 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 509 selfloop transitions, 231 changer transitions 3/877 dead transitions. [2024-11-19 09:52:37,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 877 transitions, 14879 flow [2024-11-19 09:52:37,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 09:52:37,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 09:52:37,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-11-19 09:52:37,150 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-11-19 09:52:37,150 INFO L175 Difference]: Start difference. First operand has 157 places, 723 transitions, 11574 flow. Second operand 7 states and 168 transitions. [2024-11-19 09:52:37,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 877 transitions, 14879 flow [2024-11-19 09:52:37,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 877 transitions, 14208 flow, removed 271 selfloop flow, removed 1 redundant places. [2024-11-19 09:52:37,952 INFO L231 Difference]: Finished difference. Result has 167 places, 767 transitions, 12677 flow [2024-11-19 09:52:37,952 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11022, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=723, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=495, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12677, PETRI_PLACES=167, PETRI_TRANSITIONS=767} [2024-11-19 09:52:37,953 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 124 predicate places. [2024-11-19 09:52:37,953 INFO L471 AbstractCegarLoop]: Abstraction has has 167 places, 767 transitions, 12677 flow [2024-11-19 09:52:37,953 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 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) [2024-11-19 09:52:37,953 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:52:37,953 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:52:37,953 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-11-19 09:52:37,953 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:52:37,954 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:52:37,954 INFO L85 PathProgramCache]: Analyzing trace with hash 2019919412, now seen corresponding path program 6 times [2024-11-19 09:52:37,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:52:37,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701760988] [2024-11-19 09:52:37,954 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 09:52:37,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:52:37,968 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-19 09:52:37,968 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:52:38,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:38,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:52:38,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701760988] [2024-11-19 09:52:38,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701760988] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:52:38,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636365650] [2024-11-19 09:52:38,047 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 09:52:38,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:52:38,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:52:38,049 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) [2024-11-19 09:52:38,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-19 09:52:38,109 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-19 09:52:38,109 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:52:38,110 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 09:52:38,110 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:52:38,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:38,167 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:52:38,221 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:38,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636365650] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 09:52:38,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-19 09:52:38,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 15 [2024-11-19 09:52:38,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233304568] [2024-11-19 09:52:38,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:52:38,222 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-19 09:52:38,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:52:38,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-19 09:52:38,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2024-11-19 09:52:38,241 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-11-19 09:52:38,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 767 transitions, 12677 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 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) [2024-11-19 09:52:38,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:52:38,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-11-19 09:52:38,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:52:40,109 INFO L124 PetriNetUnfolderBase]: 6861/9984 cut-off events. [2024-11-19 09:52:40,110 INFO L125 PetriNetUnfolderBase]: For 107425/107719 co-relation queries the response was YES. [2024-11-19 09:52:40,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68192 conditions, 9984 events. 6861/9984 cut-off events. For 107425/107719 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 54270 event pairs, 972 based on Foata normal form. 37/10013 useless extension candidates. Maximal degree in co-relation 66732. Up to 4016 conditions per place. [2024-11-19 09:52:40,190 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 410 selfloop transitions, 557 changer transitions 0/977 dead transitions. [2024-11-19 09:52:40,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 977 transitions, 17225 flow [2024-11-19 09:52:40,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 09:52:40,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-19 09:52:40,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 211 transitions. [2024-11-19 09:52:40,191 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5718157181571816 [2024-11-19 09:52:40,191 INFO L175 Difference]: Start difference. First operand has 167 places, 767 transitions, 12677 flow. Second operand 9 states and 211 transitions. [2024-11-19 09:52:40,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 977 transitions, 17225 flow [2024-11-19 09:52:41,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 977 transitions, 16628 flow, removed 57 selfloop flow, removed 3 redundant places. [2024-11-19 09:52:41,106 INFO L231 Difference]: Finished difference. Result has 174 places, 857 transitions, 15614 flow [2024-11-19 09:52:41,107 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12152, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=764, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=464, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15614, PETRI_PLACES=174, PETRI_TRANSITIONS=857} [2024-11-19 09:52:41,107 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 131 predicate places. [2024-11-19 09:52:41,107 INFO L471 AbstractCegarLoop]: Abstraction has has 174 places, 857 transitions, 15614 flow [2024-11-19 09:52:41,107 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 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) [2024-11-19 09:52:41,107 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:52:41,107 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:52:41,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-19 09:52:41,308 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:52:41,308 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:52:41,308 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:52:41,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1089431860, now seen corresponding path program 7 times [2024-11-19 09:52:41,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:52:41,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744351542] [2024-11-19 09:52:41,308 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-19 09:52:41,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:52:41,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:52:41,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:52:41,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:52:41,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744351542] [2024-11-19 09:52:41,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744351542] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:52:41,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526787820] [2024-11-19 09:52:41,381 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-19 09:52:41,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:52:41,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:52:41,385 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:52:41,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-19 09:52:41,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:52:41,452 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 09:52:41,454 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:52:41,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:52:41,517 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:52:41,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:52:41,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526787820] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 09:52:41,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-19 09:52:41,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 15 [2024-11-19 09:52:41,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509363734] [2024-11-19 09:52:41,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:52:41,575 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-19 09:52:41,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:52:41,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-19 09:52:41,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2024-11-19 09:52:41,591 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-11-19 09:52:41,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 857 transitions, 15614 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 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) [2024-11-19 09:52:41,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:52:41,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-11-19 09:52:41,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:52:43,625 INFO L124 PetriNetUnfolderBase]: 6798/9881 cut-off events. [2024-11-19 09:52:43,625 INFO L125 PetriNetUnfolderBase]: For 122729/123008 co-relation queries the response was YES. [2024-11-19 09:52:43,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69873 conditions, 9881 events. 6798/9881 cut-off events. For 122729/123008 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 53390 event pairs, 692 based on Foata normal form. 42/9909 useless extension candidates. Maximal degree in co-relation 68921. Up to 2377 conditions per place. [2024-11-19 09:52:43,730 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 284 selfloop transitions, 652 changer transitions 0/946 dead transitions. [2024-11-19 09:52:43,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 946 transitions, 18077 flow [2024-11-19 09:52:43,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-19 09:52:43,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-19 09:52:43,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-11-19 09:52:43,731 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5701219512195121 [2024-11-19 09:52:43,731 INFO L175 Difference]: Start difference. First operand has 174 places, 857 transitions, 15614 flow. Second operand 8 states and 187 transitions. [2024-11-19 09:52:43,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 946 transitions, 18077 flow [2024-11-19 09:52:44,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 946 transitions, 18032 flow, removed 21 selfloop flow, removed 2 redundant places. [2024-11-19 09:52:44,837 INFO L231 Difference]: Finished difference. Result has 181 places, 857 transitions, 17515 flow [2024-11-19 09:52:44,838 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15459, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=851, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=646, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=17515, PETRI_PLACES=181, PETRI_TRANSITIONS=857} [2024-11-19 09:52:44,838 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 138 predicate places. [2024-11-19 09:52:44,838 INFO L471 AbstractCegarLoop]: Abstraction has has 181 places, 857 transitions, 17515 flow [2024-11-19 09:52:44,838 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 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) [2024-11-19 09:52:44,838 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:52:44,839 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:52:44,850 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-19 09:52:45,039 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:52:45,039 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:52:45,039 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:52:45,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1214561214, now seen corresponding path program 8 times [2024-11-19 09:52:45,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:52:45,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133557953] [2024-11-19 09:52:45,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:52:45,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:52:45,048 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:52:45,049 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:52:45,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:52:45,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:52:45,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133557953] [2024-11-19 09:52:45,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133557953] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:52:45,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254318610] [2024-11-19 09:52:45,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:52:45,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:52:45,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:52:45,122 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:52:45,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-19 09:52:45,179 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:52:45,180 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:52:45,180 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 09:52:45,181 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:52:45,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:52:45,236 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:52:45,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:52:45,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254318610] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 09:52:45,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-19 09:52:45,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 14 [2024-11-19 09:52:45,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986586203] [2024-11-19 09:52:45,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:52:45,297 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-19 09:52:45,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:52:45,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-19 09:52:45,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2024-11-19 09:52:45,311 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-11-19 09:52:45,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 857 transitions, 17515 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 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) [2024-11-19 09:52:45,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:52:45,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-11-19 09:52:45,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:52:47,318 INFO L124 PetriNetUnfolderBase]: 6763/9809 cut-off events. [2024-11-19 09:52:47,319 INFO L125 PetriNetUnfolderBase]: For 145129/145408 co-relation queries the response was YES. [2024-11-19 09:52:47,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74831 conditions, 9809 events. 6763/9809 cut-off events. For 145129/145408 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 52833 event pairs, 746 based on Foata normal form. 20/9814 useless extension candidates. Maximal degree in co-relation 74101. Up to 3359 conditions per place. [2024-11-19 09:52:47,426 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 403 selfloop transitions, 508 changer transitions 0/921 dead transitions. [2024-11-19 09:52:47,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 921 transitions, 19864 flow [2024-11-19 09:52:47,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-19 09:52:47,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-19 09:52:47,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-11-19 09:52:47,427 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5640243902439024 [2024-11-19 09:52:47,427 INFO L175 Difference]: Start difference. First operand has 181 places, 857 transitions, 17515 flow. Second operand 8 states and 185 transitions. [2024-11-19 09:52:47,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 921 transitions, 19864 flow [2024-11-19 09:52:48,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 921 transitions, 19433 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-11-19 09:52:48,863 INFO L231 Difference]: Finished difference. Result has 180 places, 856 transitions, 18095 flow [2024-11-19 09:52:48,864 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=17079, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=856, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=508, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=18095, PETRI_PLACES=180, PETRI_TRANSITIONS=856} [2024-11-19 09:52:48,864 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 137 predicate places. [2024-11-19 09:52:48,864 INFO L471 AbstractCegarLoop]: Abstraction has has 180 places, 856 transitions, 18095 flow [2024-11-19 09:52:48,864 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 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) [2024-11-19 09:52:48,865 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:52:48,865 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:52:48,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-19 09:52:49,065 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-19 09:52:49,065 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:52:49,065 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:52:49,065 INFO L85 PathProgramCache]: Analyzing trace with hash -841136508, now seen corresponding path program 1 times [2024-11-19 09:52:49,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:52:49,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373539351] [2024-11-19 09:52:49,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:52:49,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:52:49,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:52:49,344 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:49,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:52:49,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373539351] [2024-11-19 09:52:49,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373539351] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:52:49,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388337679] [2024-11-19 09:52:49,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:52:49,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:52:49,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:52:49,346 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:52:49,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-19 09:52:49,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:52:49,407 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-19 09:52:49,408 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:52:49,445 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-19 09:52:49,655 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-19 09:52:49,681 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:49,681 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:52:49,998 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2024-11-19 09:52:50,013 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 09:52:50,014 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 86 [2024-11-19 09:52:50,530 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:50,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388337679] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:52:50,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:52:50,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2024-11-19 09:52:50,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124807236] [2024-11-19 09:52:50,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:52:50,532 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-19 09:52:50,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:52:50,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-19 09:52:50,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2024-11-19 09:52:51,457 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-11-19 09:52:51,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 856 transitions, 18095 flow. Second operand has 26 states, 26 states have (on average 17.653846153846153) internal successors, (459), 26 states have internal predecessors, (459), 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) [2024-11-19 09:52:51,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:52:51,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-11-19 09:52:51,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:52:54,767 INFO L124 PetriNetUnfolderBase]: 8324/12329 cut-off events. [2024-11-19 09:52:54,767 INFO L125 PetriNetUnfolderBase]: For 202815/203278 co-relation queries the response was YES. [2024-11-19 09:52:54,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97477 conditions, 12329 events. 8324/12329 cut-off events. For 202815/203278 co-relation queries the response was YES. Maximal size of possible extension queue 615. Compared 72498 event pairs, 660 based on Foata normal form. 169/12445 useless extension candidates. Maximal degree in co-relation 95432. Up to 6821 conditions per place. [2024-11-19 09:52:54,893 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 874 selfloop transitions, 634 changer transitions 6/1681 dead transitions. [2024-11-19 09:52:54,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 1681 transitions, 36719 flow [2024-11-19 09:52:54,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-19 09:52:54,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-19 09:52:54,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 468 transitions. [2024-11-19 09:52:54,896 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6007702182284981 [2024-11-19 09:52:54,896 INFO L175 Difference]: Start difference. First operand has 180 places, 856 transitions, 18095 flow. Second operand 19 states and 468 transitions. [2024-11-19 09:52:54,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 1681 transitions, 36719 flow [2024-11-19 09:52:57,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 1681 transitions, 35623 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-11-19 09:52:57,132 INFO L231 Difference]: Finished difference. Result has 202 places, 1317 transitions, 29874 flow [2024-11-19 09:52:57,132 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=17603, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=856, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=282, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=496, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=29874, PETRI_PLACES=202, PETRI_TRANSITIONS=1317} [2024-11-19 09:52:57,133 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 159 predicate places. [2024-11-19 09:52:57,133 INFO L471 AbstractCegarLoop]: Abstraction has has 202 places, 1317 transitions, 29874 flow [2024-11-19 09:52:57,133 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 17.653846153846153) internal successors, (459), 26 states have internal predecessors, (459), 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) [2024-11-19 09:52:57,133 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:52:57,133 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:52:57,146 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-19 09:52:57,333 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:52:57,334 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:52:57,334 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:52:57,334 INFO L85 PathProgramCache]: Analyzing trace with hash 313019692, now seen corresponding path program 2 times [2024-11-19 09:52:57,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:52:57,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883126219] [2024-11-19 09:52:57,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:52:57,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:52:57,360 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:52:57,360 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:52:57,677 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:57,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:52:57,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883126219] [2024-11-19 09:52:57,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883126219] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:52:57,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433966248] [2024-11-19 09:52:57,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:52:57,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:52:57,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:52:57,679 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:52:57,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-19 09:52:57,732 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:52:57,732 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:52:57,733 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-19 09:52:57,734 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:52:57,760 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-19 09:52:57,946 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-19 09:52:57,962 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:57,962 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:52:58,150 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:52:58,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433966248] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:52:58,150 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:52:58,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 26 [2024-11-19 09:52:58,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554827007] [2024-11-19 09:52:58,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:52:58,151 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-19 09:52:58,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:52:58,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-19 09:52:58,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2024-11-19 09:52:58,492 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-11-19 09:52:58,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 1317 transitions, 29874 flow. Second operand has 27 states, 27 states have (on average 17.444444444444443) internal successors, (471), 27 states have internal predecessors, (471), 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) [2024-11-19 09:52:58,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:52:58,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-11-19 09:52:58,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:53:02,362 INFO L124 PetriNetUnfolderBase]: 9237/13782 cut-off events. [2024-11-19 09:53:02,362 INFO L125 PetriNetUnfolderBase]: For 267755/268298 co-relation queries the response was YES. [2024-11-19 09:53:02,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115841 conditions, 13782 events. 9237/13782 cut-off events. For 267755/268298 co-relation queries the response was YES. Maximal size of possible extension queue 712. Compared 84205 event pairs, 554 based on Foata normal form. 120/13718 useless extension candidates. Maximal degree in co-relation 114956. Up to 9200 conditions per place. [2024-11-19 09:53:02,642 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 860 selfloop transitions, 685 changer transitions 3/1736 dead transitions. [2024-11-19 09:53:02,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 1736 transitions, 41174 flow [2024-11-19 09:53:02,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-19 09:53:02,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-19 09:53:02,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 268 transitions. [2024-11-19 09:53:02,644 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5447154471544715 [2024-11-19 09:53:02,644 INFO L175 Difference]: Start difference. First operand has 202 places, 1317 transitions, 29874 flow. Second operand 12 states and 268 transitions. [2024-11-19 09:53:02,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 1736 transitions, 41174 flow [2024-11-19 09:53:06,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 1736 transitions, 39872 flow, removed 555 selfloop flow, removed 4 redundant places. [2024-11-19 09:53:06,800 INFO L231 Difference]: Finished difference. Result has 217 places, 1612 transitions, 38686 flow [2024-11-19 09:53:06,801 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=28800, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=391, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=646, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=38686, PETRI_PLACES=217, PETRI_TRANSITIONS=1612} [2024-11-19 09:53:06,802 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 174 predicate places. [2024-11-19 09:53:06,802 INFO L471 AbstractCegarLoop]: Abstraction has has 217 places, 1612 transitions, 38686 flow [2024-11-19 09:53:06,802 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 17.444444444444443) internal successors, (471), 27 states have internal predecessors, (471), 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) [2024-11-19 09:53:06,802 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:53:06,802 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:53:06,814 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-19 09:53:07,006 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:53:07,006 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:53:07,007 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:53:07,007 INFO L85 PathProgramCache]: Analyzing trace with hash 834864366, now seen corresponding path program 3 times [2024-11-19 09:53:07,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:53:07,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296580150] [2024-11-19 09:53:07,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 09:53:07,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:53:07,023 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-19 09:53:07,023 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:53:07,446 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:53:07,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:53:07,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296580150] [2024-11-19 09:53:07,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296580150] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:53:07,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962702787] [2024-11-19 09:53:07,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 09:53:07,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:53:07,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:53:07,449 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:53:07,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-19 09:53:07,519 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-19 09:53:07,520 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:53:07,521 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-19 09:53:07,522 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:53:07,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-19 09:53:07,820 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-19 09:53:07,844 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:53:07,844 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:53:08,110 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:53:08,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962702787] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:53:08,111 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:53:08,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 26 [2024-11-19 09:53:08,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274104887] [2024-11-19 09:53:08,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:53:08,111 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-19 09:53:08,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:53:08,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-19 09:53:08,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2024-11-19 09:53:08,694 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-11-19 09:53:08,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 1612 transitions, 38686 flow. Second operand has 27 states, 27 states have (on average 17.444444444444443) internal successors, (471), 27 states have internal predecessors, (471), 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) [2024-11-19 09:53:08,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:53:08,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-11-19 09:53:08,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:53:15,652 INFO L124 PetriNetUnfolderBase]: 11989/18044 cut-off events. [2024-11-19 09:53:15,652 INFO L125 PetriNetUnfolderBase]: For 435981/436731 co-relation queries the response was YES. [2024-11-19 09:53:15,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161911 conditions, 18044 events. 11989/18044 cut-off events. For 435981/436731 co-relation queries the response was YES. Maximal size of possible extension queue 855. Compared 115964 event pairs, 677 based on Foata normal form. 285/18116 useless extension candidates. Maximal degree in co-relation 160995. Up to 11693 conditions per place. [2024-11-19 09:53:16,086 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 1146 selfloop transitions, 1106 changer transitions 7/2447 dead transitions. [2024-11-19 09:53:16,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 2447 transitions, 62431 flow [2024-11-19 09:53:16,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-19 09:53:16,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-19 09:53:16,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 422 transitions. [2024-11-19 09:53:16,088 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5718157181571816 [2024-11-19 09:53:16,088 INFO L175 Difference]: Start difference. First operand has 217 places, 1612 transitions, 38686 flow. Second operand 18 states and 422 transitions. [2024-11-19 09:53:16,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 2447 transitions, 62431 flow [2024-11-19 09:53:20,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 2447 transitions, 61660 flow, removed 383 selfloop flow, removed 2 redundant places. [2024-11-19 09:53:20,997 INFO L231 Difference]: Finished difference. Result has 241 places, 2233 transitions, 58155 flow [2024-11-19 09:53:20,998 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=38201, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1612, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=516, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=801, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=58155, PETRI_PLACES=241, PETRI_TRANSITIONS=2233} [2024-11-19 09:53:20,999 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 198 predicate places. [2024-11-19 09:53:20,999 INFO L471 AbstractCegarLoop]: Abstraction has has 241 places, 2233 transitions, 58155 flow [2024-11-19 09:53:20,999 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 17.444444444444443) internal successors, (471), 27 states have internal predecessors, (471), 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) [2024-11-19 09:53:20,999 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:53:20,999 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:53:21,016 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-19 09:53:21,199 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:53:21,200 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:53:21,200 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:53:21,200 INFO L85 PathProgramCache]: Analyzing trace with hash 542201786, now seen corresponding path program 4 times [2024-11-19 09:53:21,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:53:21,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181798673] [2024-11-19 09:53:21,200 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 09:53:21,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:53:21,219 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 09:53:21,219 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:53:21,472 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:53:21,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:53:21,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181798673] [2024-11-19 09:53:21,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181798673] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:53:21,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174365960] [2024-11-19 09:53:21,473 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 09:53:21,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:53:21,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:53:21,475 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:53:21,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-19 09:53:21,539 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 09:53:21,540 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:53:21,541 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-19 09:53:21,542 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:53:21,571 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-19 09:53:21,784 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-19 09:53:21,804 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:53:21,804 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:53:21,989 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:53:21,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174365960] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:53:21,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:53:21,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 26 [2024-11-19 09:53:21,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478097966] [2024-11-19 09:53:21,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:53:21,990 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-19 09:53:21,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:53:21,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-19 09:53:21,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2024-11-19 09:53:22,364 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-11-19 09:53:22,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 2233 transitions, 58155 flow. Second operand has 27 states, 27 states have (on average 17.444444444444443) internal successors, (471), 27 states have internal predecessors, (471), 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) [2024-11-19 09:53:22,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:53:22,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-11-19 09:53:22,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:53:29,525 INFO L124 PetriNetUnfolderBase]: 12081/18227 cut-off events. [2024-11-19 09:53:29,525 INFO L125 PetriNetUnfolderBase]: For 482814/483639 co-relation queries the response was YES. [2024-11-19 09:53:29,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174443 conditions, 18227 events. 12081/18227 cut-off events. For 482814/483639 co-relation queries the response was YES. Maximal size of possible extension queue 912. Compared 118880 event pairs, 812 based on Foata normal form. 357/18340 useless extension candidates. Maximal degree in co-relation 173462. Up to 11996 conditions per place. [2024-11-19 09:53:29,747 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 980 selfloop transitions, 1187 changer transitions 2/2357 dead transitions. [2024-11-19 09:53:29,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 2357 transitions, 64627 flow [2024-11-19 09:53:29,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-19 09:53:29,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-19 09:53:29,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 268 transitions. [2024-11-19 09:53:29,749 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5447154471544715 [2024-11-19 09:53:29,749 INFO L175 Difference]: Start difference. First operand has 241 places, 2233 transitions, 58155 flow. Second operand 12 states and 268 transitions. [2024-11-19 09:53:29,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 2357 transitions, 64627 flow [2024-11-19 09:53:35,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 2357 transitions, 63944 flow, removed 339 selfloop flow, removed 2 redundant places. [2024-11-19 09:53:35,267 INFO L231 Difference]: Finished difference. Result has 254 places, 2271 transitions, 61063 flow [2024-11-19 09:53:35,269 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=57472, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1069, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=61063, PETRI_PLACES=254, PETRI_TRANSITIONS=2271} [2024-11-19 09:53:35,269 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 211 predicate places. [2024-11-19 09:53:35,269 INFO L471 AbstractCegarLoop]: Abstraction has has 254 places, 2271 transitions, 61063 flow [2024-11-19 09:53:35,270 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 17.444444444444443) internal successors, (471), 27 states have internal predecessors, (471), 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) [2024-11-19 09:53:35,270 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:53:35,270 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:53:35,283 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-19 09:53:35,470 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-19 09:53:35,470 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:53:35,471 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:53:35,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1768792436, now seen corresponding path program 5 times [2024-11-19 09:53:35,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:53:35,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494579111] [2024-11-19 09:53:35,471 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 09:53:35,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:53:35,482 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:53:35,482 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:53:35,879 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:53:35,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:53:35,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494579111] [2024-11-19 09:53:35,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494579111] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:53:35,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775108299] [2024-11-19 09:53:35,880 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 09:53:35,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:53:35,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:53:35,882 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:53:35,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-19 09:53:35,979 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:53:35,979 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:53:35,981 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-19 09:53:35,984 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:53:36,041 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-19 09:53:36,243 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 09:53:36,244 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 17 treesize of output 15 [2024-11-19 09:53:36,387 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:53:36,388 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:53:36,784 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2024-11-19 09:53:36,793 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 09:53:36,793 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 86 [2024-11-19 09:53:38,927 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:53:38,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775108299] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:53:38,927 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:53:38,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 32 [2024-11-19 09:53:38,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785083242] [2024-11-19 09:53:38,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:53:38,927 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-19 09:53:38,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:53:38,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-19 09:53:38,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=873, Unknown=0, NotChecked=0, Total=1056 [2024-11-19 09:53:39,754 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-11-19 09:53:39,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 2271 transitions, 61063 flow. Second operand has 33 states, 33 states have (on average 15.181818181818182) internal successors, (501), 33 states have internal predecessors, (501), 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) [2024-11-19 09:53:39,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:53:39,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-11-19 09:53:39,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:53:45,672 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 []