./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version fca748b1 Calling Ultimate with: /root/.sdkman/candidates/java/current/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 /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.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 1d936eafcc314e66bb4cd572754c58bf1f2fc59d35c83764f43dae769bce220a --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dd.update-z3-fca748b-m [2024-11-20 17:45:39,581 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-20 17:45:39,663 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-20 17:45:39,668 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-20 17:45:39,669 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-20 17:45:39,689 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-20 17:45:39,690 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-20 17:45:39,690 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-20 17:45:39,691 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-20 17:45:39,692 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-20 17:45:39,693 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-20 17:45:39,693 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-20 17:45:39,694 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-20 17:45:39,694 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-20 17:45:39,696 INFO L153 SettingsManager]: * Use SBE=true [2024-11-20 17:45:39,697 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-20 17:45:39,698 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-20 17:45:39,698 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-20 17:45:39,702 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-20 17:45:39,702 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-20 17:45:39,703 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-20 17:45:39,703 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-20 17:45:39,704 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-20 17:45:39,704 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-20 17:45:39,704 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-20 17:45:39,704 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-20 17:45:39,705 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-20 17:45:39,705 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-20 17:45:39,705 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-20 17:45:39,705 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-20 17:45:39,705 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-20 17:45:39,706 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-20 17:45:39,706 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-20 17:45:39,706 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 17:45:39,706 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-20 17:45:39,706 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-20 17:45:39,707 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-20 17:45:39,707 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-20 17:45:39,707 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-20 17:45:39,708 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-20 17:45:39,708 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-20 17:45:39,708 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-20 17:45:39,708 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d936eafcc314e66bb4cd572754c58bf1f2fc59d35c83764f43dae769bce220a [2024-11-20 17:45:39,942 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-20 17:45:39,968 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-20 17:45:39,971 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-20 17:45:39,972 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-20 17:45:39,973 INFO L274 PluginConnector]: CDTParser initialized [2024-11-20 17:45:39,974 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c [2024-11-20 17:45:41,478 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-20 17:45:41,674 INFO L384 CDTParser]: Found 1 translation units. [2024-11-20 17:45:41,675 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c [2024-11-20 17:45:41,683 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be4444bac/4be93bccb48247c58efde9c0a34d6675/FLAG7e743a7a3 [2024-11-20 17:45:41,699 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be4444bac/4be93bccb48247c58efde9c0a34d6675 [2024-11-20 17:45:41,702 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-20 17:45:41,704 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-20 17:45:41,705 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-20 17:45:41,705 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-20 17:45:41,710 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-20 17:45:41,711 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:45:41" (1/1) ... [2024-11-20 17:45:41,712 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53f179ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:45:41, skipping insertion in model container [2024-11-20 17:45:41,712 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:45:41" (1/1) ... [2024-11-20 17:45:41,736 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-20 17:45:42,020 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-20 17:45:42,027 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 17:45:42,042 INFO L200 MainTranslator]: Completed pre-run [2024-11-20 17:45:42,081 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 17:45:42,101 INFO L204 MainTranslator]: Completed translation [2024-11-20 17:45:42,102 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:45:42 WrapperNode [2024-11-20 17:45:42,102 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-20 17:45:42,103 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-20 17:45:42,104 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-20 17:45:42,104 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-20 17:45:42,111 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:45:42" (1/1) ... [2024-11-20 17:45:42,119 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:45:42" (1/1) ... [2024-11-20 17:45:42,152 INFO L138 Inliner]: procedures = 24, calls = 31, calls flagged for inlining = 13, calls inlined = 17, statements flattened = 184 [2024-11-20 17:45:42,156 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-20 17:45:42,156 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-20 17:45:42,156 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-20 17:45:42,156 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-20 17:45:42,169 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:45:42" (1/1) ... [2024-11-20 17:45:42,170 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:45:42" (1/1) ... [2024-11-20 17:45:42,173 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:45:42" (1/1) ... [2024-11-20 17:45:42,195 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]. [2024-11-20 17:45:42,195 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:45:42" (1/1) ... [2024-11-20 17:45:42,195 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:45:42" (1/1) ... [2024-11-20 17:45:42,202 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:45:42" (1/1) ... [2024-11-20 17:45:42,206 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:45:42" (1/1) ... [2024-11-20 17:45:42,208 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:45:42" (1/1) ... [2024-11-20 17:45:42,209 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:45:42" (1/1) ... [2024-11-20 17:45:42,212 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-20 17:45:42,213 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-20 17:45:42,214 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-20 17:45:42,214 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-20 17:45:42,215 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:45:42" (1/1) ... [2024-11-20 17:45:42,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 17:45:42,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:45:42,254 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) [2024-11-20 17:45:42,256 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 [2024-11-20 17:45:42,303 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-20 17:45:42,304 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-20 17:45:42,304 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-20 17:45:42,304 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-20 17:45:42,304 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-20 17:45:42,304 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-20 17:45:42,304 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-20 17:45:42,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-20 17:45:42,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-20 17:45:42,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-20 17:45:42,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-20 17:45:42,305 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-20 17:45:42,305 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-20 17:45:42,305 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-20 17:45:42,305 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-20 17:45:42,306 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-20 17:45:42,306 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-20 17:45:42,306 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-20 17:45:42,308 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-20 17:45:42,412 INFO L238 CfgBuilder]: Building ICFG [2024-11-20 17:45:42,415 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-20 17:45:42,723 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-20 17:45:42,723 INFO L287 CfgBuilder]: Performing block encoding [2024-11-20 17:45:43,027 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-20 17:45:43,029 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-20 17:45:43,030 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:45:43 BoogieIcfgContainer [2024-11-20 17:45:43,030 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-20 17:45:43,032 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-20 17:45:43,033 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-20 17:45:43,036 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-20 17:45:43,037 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 05:45:41" (1/3) ... [2024-11-20 17:45:43,038 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d453535 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:45:43, skipping insertion in model container [2024-11-20 17:45:43,039 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:45:42" (2/3) ... [2024-11-20 17:45:43,039 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d453535 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:45:43, skipping insertion in model container [2024-11-20 17:45:43,039 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:45:43" (3/3) ... [2024-11-20 17:45:43,040 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum-alt2.wvr.c [2024-11-20 17:45:43,058 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-20 17:45:43,059 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2024-11-20 17:45:43,059 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-20 17:45:43,123 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-20 17:45:43,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 44 transitions, 109 flow [2024-11-20 17:45:43,194 INFO L124 PetriNetUnfolderBase]: 4/41 cut-off events. [2024-11-20 17:45:43,194 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-20 17:45:43,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54 conditions, 41 events. 4/41 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 75 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 30. Up to 2 conditions per place. [2024-11-20 17:45:43,199 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 44 transitions, 109 flow [2024-11-20 17:45:43,202 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 46 places, 40 transitions, 98 flow [2024-11-20 17:45:43,210 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-20 17:45:43,217 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;@5d5d94a2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-20 17:45:43,217 INFO L334 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2024-11-20 17:45:43,220 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-20 17:45:43,220 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-20 17:45:43,220 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-20 17:45:43,220 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:45:43,221 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-20 17:45:43,222 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-20 17:45:43,227 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:45:43,228 INFO L85 PathProgramCache]: Analyzing trace with hash 608571, now seen corresponding path program 1 times [2024-11-20 17:45:43,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:45:43,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133807875] [2024-11-20 17:45:43,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:45:43,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:45:43,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:45:43,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:45:43,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:45:43,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133807875] [2024-11-20 17:45:43,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133807875] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:45:43,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:45:43,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-20 17:45:43,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506355711] [2024-11-20 17:45:43,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:45:43,531 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:45:43,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:45:43,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:45:43,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:45:43,580 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-11-20 17:45:43,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 40 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:45:43,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:45:43,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-11-20 17:45:43,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:45:44,002 INFO L124 PetriNetUnfolderBase]: 1316/1925 cut-off events. [2024-11-20 17:45:44,002 INFO L125 PetriNetUnfolderBase]: For 66/66 co-relation queries the response was YES. [2024-11-20 17:45:44,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3938 conditions, 1925 events. 1316/1925 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 9784 event pairs, 1060 based on Foata normal form. 1/1372 useless extension candidates. Maximal degree in co-relation 3632. Up to 1877 conditions per place. [2024-11-20 17:45:44,027 INFO L140 encePairwiseOnDemand]: 40/44 looper letters, 30 selfloop transitions, 2 changer transitions 0/37 dead transitions. [2024-11-20 17:45:44,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 37 transitions, 156 flow [2024-11-20 17:45:44,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:45:44,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:45:44,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 61 transitions. [2024-11-20 17:45:44,041 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4621212121212121 [2024-11-20 17:45:44,044 INFO L175 Difference]: Start difference. First operand has 46 places, 40 transitions, 98 flow. Second operand 3 states and 61 transitions. [2024-11-20 17:45:44,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 37 transitions, 156 flow [2024-11-20 17:45:44,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 37 transitions, 144 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-20 17:45:44,061 INFO L231 Difference]: Finished difference. Result has 39 places, 37 transitions, 84 flow [2024-11-20 17:45:44,063 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=39, PETRI_TRANSITIONS=37} [2024-11-20 17:45:44,069 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, -7 predicate places. [2024-11-20 17:45:44,069 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 37 transitions, 84 flow [2024-11-20 17:45:44,070 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:45:44,070 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:45:44,071 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-20 17:45:44,071 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-20 17:45:44,071 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-20 17:45:44,072 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:45:44,073 INFO L85 PathProgramCache]: Analyzing trace with hash 608572, now seen corresponding path program 1 times [2024-11-20 17:45:44,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:45:44,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068088203] [2024-11-20 17:45:44,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:45:44,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:45:44,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:45:44,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:45:44,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:45:44,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068088203] [2024-11-20 17:45:44,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068088203] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:45:44,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:45:44,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 17:45:44,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671956450] [2024-11-20 17:45:44,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:45:44,420 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:45:44,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:45:44,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:45:44,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:45:44,427 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-11-20 17:45:44,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 37 transitions, 84 flow. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:45:44,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:45:44,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-11-20 17:45:44,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:45:44,729 INFO L124 PetriNetUnfolderBase]: 1317/1928 cut-off events. [2024-11-20 17:45:44,733 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-20 17:45:44,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3860 conditions, 1928 events. 1317/1928 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 9832 event pairs, 1060 based on Foata normal form. 0/1374 useless extension candidates. Maximal degree in co-relation 3838. Up to 1882 conditions per place. [2024-11-20 17:45:44,758 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 32 selfloop transitions, 4 changer transitions 0/40 dead transitions. [2024-11-20 17:45:44,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 40 transitions, 164 flow [2024-11-20 17:45:44,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 17:45:44,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 17:45:44,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 73 transitions. [2024-11-20 17:45:44,763 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4147727272727273 [2024-11-20 17:45:44,763 INFO L175 Difference]: Start difference. First operand has 39 places, 37 transitions, 84 flow. Second operand 4 states and 73 transitions. [2024-11-20 17:45:44,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 40 transitions, 164 flow [2024-11-20 17:45:44,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 40 transitions, 158 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:45:44,767 INFO L231 Difference]: Finished difference. Result has 42 places, 40 transitions, 107 flow [2024-11-20 17:45:44,768 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=107, PETRI_PLACES=42, PETRI_TRANSITIONS=40} [2024-11-20 17:45:44,769 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, -4 predicate places. [2024-11-20 17:45:44,769 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 40 transitions, 107 flow [2024-11-20 17:45:44,770 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:45:44,770 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:45:44,771 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-20 17:45:44,771 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-20 17:45:44,771 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-20 17:45:44,772 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:45:44,773 INFO L85 PathProgramCache]: Analyzing trace with hash 584856210, now seen corresponding path program 1 times [2024-11-20 17:45:44,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:45:44,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918653413] [2024-11-20 17:45:44,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:45:44,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:45:44,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:45:45,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:45:45,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:45:45,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918653413] [2024-11-20 17:45:45,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918653413] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:45:45,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108196966] [2024-11-20 17:45:45,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:45:45,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:45:45,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:45:45,042 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) [2024-11-20 17:45:45,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-20 17:45:45,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:45:45,126 INFO L255 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-20 17:45:45,135 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:45:45,234 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 [2024-11-20 17:45:45,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:45:45,434 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:45:45,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:45:45,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108196966] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:45:45,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:45:45,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-20 17:45:45,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802719067] [2024-11-20 17:45:45,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:45:45,559 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-20 17:45:45,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:45:45,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-20 17:45:45,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-11-20 17:45:45,601 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-11-20 17:45:45,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 107 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:45:45,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:45:45,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-11-20 17:45:45,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:45:46,032 INFO L124 PetriNetUnfolderBase]: 1317/1927 cut-off events. [2024-11-20 17:45:46,032 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-20 17:45:46,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3867 conditions, 1927 events. 1317/1927 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 9798 event pairs, 1060 based on Foata normal form. 0/1373 useless extension candidates. Maximal degree in co-relation 3845. Up to 1878 conditions per place. [2024-11-20 17:45:46,060 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 28 selfloop transitions, 7 changer transitions 0/39 dead transitions. [2024-11-20 17:45:46,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 39 transitions, 173 flow [2024-11-20 17:45:46,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 17:45:46,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-20 17:45:46,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 90 transitions. [2024-11-20 17:45:46,063 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3409090909090909 [2024-11-20 17:45:46,063 INFO L175 Difference]: Start difference. First operand has 42 places, 40 transitions, 107 flow. Second operand 6 states and 90 transitions. [2024-11-20 17:45:46,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 39 transitions, 173 flow [2024-11-20 17:45:46,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 39 transitions, 170 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 17:45:46,064 INFO L231 Difference]: Finished difference. Result has 45 places, 39 transitions, 114 flow [2024-11-20 17:45:46,064 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=114, PETRI_PLACES=45, PETRI_TRANSITIONS=39} [2024-11-20 17:45:46,065 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, -1 predicate places. [2024-11-20 17:45:46,065 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 39 transitions, 114 flow [2024-11-20 17:45:46,065 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:45:46,066 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:45:46,066 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-20 17:45:46,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-20 17:45:46,266 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 [2024-11-20 17:45:46,267 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-20 17:45:46,268 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:45:46,268 INFO L85 PathProgramCache]: Analyzing trace with hash 952797354, now seen corresponding path program 1 times [2024-11-20 17:45:46,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:45:46,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528038445] [2024-11-20 17:45:46,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:45:46,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:45:46,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:45:46,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:45:46,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:45:46,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528038445] [2024-11-20 17:45:46,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528038445] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:45:46,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:45:46,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 17:45:46,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503767922] [2024-11-20 17:45:46,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:45:46,327 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:45:46,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:45:46,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:45:46,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:45:46,336 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-11-20 17:45:46,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 39 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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) [2024-11-20 17:45:46,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:45:46,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-11-20 17:45:46,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:45:46,467 INFO L124 PetriNetUnfolderBase]: 793/1173 cut-off events. [2024-11-20 17:45:46,468 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-11-20 17:45:46,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2364 conditions, 1173 events. 793/1173 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 5312 event pairs, 608 based on Foata normal form. 0/958 useless extension candidates. Maximal degree in co-relation 2338. Up to 1135 conditions per place. [2024-11-20 17:45:46,476 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 29 selfloop transitions, 3 changer transitions 0/36 dead transitions. [2024-11-20 17:45:46,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 36 transitions, 172 flow [2024-11-20 17:45:46,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 17:45:46,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 17:45:46,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 68 transitions. [2024-11-20 17:45:46,477 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38636363636363635 [2024-11-20 17:45:46,478 INFO L175 Difference]: Start difference. First operand has 45 places, 39 transitions, 114 flow. Second operand 4 states and 68 transitions. [2024-11-20 17:45:46,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 36 transitions, 172 flow [2024-11-20 17:45:46,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 36 transitions, 142 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-11-20 17:45:46,480 INFO L231 Difference]: Finished difference. Result has 38 places, 36 transitions, 84 flow [2024-11-20 17:45:46,481 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=78, 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=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=84, PETRI_PLACES=38, PETRI_TRANSITIONS=36} [2024-11-20 17:45:46,481 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, -8 predicate places. [2024-11-20 17:45:46,482 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 36 transitions, 84 flow [2024-11-20 17:45:46,482 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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) [2024-11-20 17:45:46,482 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:45:46,482 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-20 17:45:46,482 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-20 17:45:46,483 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-20 17:45:46,483 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:45:46,483 INFO L85 PathProgramCache]: Analyzing trace with hash 952797355, now seen corresponding path program 1 times [2024-11-20 17:45:46,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:45:46,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479134546] [2024-11-20 17:45:46,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:45:46,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:45:46,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:45:46,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:45:46,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:45:46,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479134546] [2024-11-20 17:45:46,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479134546] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:45:46,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:45:46,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 17:45:46,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455646127] [2024-11-20 17:45:46,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:45:46,557 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:45:46,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:45:46,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:45:46,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 17:45:46,565 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-11-20 17:45:46,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 36 transitions, 84 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:45:46,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:45:46,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-11-20 17:45:46,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:45:46,859 INFO L124 PetriNetUnfolderBase]: 1374/2050 cut-off events. [2024-11-20 17:45:46,860 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-11-20 17:45:46,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4114 conditions, 2050 events. 1374/2050 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 10084 event pairs, 908 based on Foata normal form. 0/1694 useless extension candidates. Maximal degree in co-relation 2756. Up to 1347 conditions per place. [2024-11-20 17:45:46,873 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 65 selfloop transitions, 5 changer transitions 0/73 dead transitions. [2024-11-20 17:45:46,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 73 transitions, 306 flow [2024-11-20 17:45:46,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:45:46,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:45:46,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 116 transitions. [2024-11-20 17:45:46,875 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5272727272727272 [2024-11-20 17:45:46,875 INFO L175 Difference]: Start difference. First operand has 38 places, 36 transitions, 84 flow. Second operand 5 states and 116 transitions. [2024-11-20 17:45:46,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 73 transitions, 306 flow [2024-11-20 17:45:46,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 73 transitions, 302 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:45:46,877 INFO L231 Difference]: Finished difference. Result has 42 places, 38 transitions, 105 flow [2024-11-20 17:45:46,877 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=36, 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=105, PETRI_PLACES=42, PETRI_TRANSITIONS=38} [2024-11-20 17:45:46,877 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, -4 predicate places. [2024-11-20 17:45:46,877 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 38 transitions, 105 flow [2024-11-20 17:45:46,878 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:45:46,878 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:45:46,878 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:45:46,878 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-20 17:45:46,878 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-20 17:45:46,878 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:45:46,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1228269675, now seen corresponding path program 1 times [2024-11-20 17:45:46,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:45:46,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492529281] [2024-11-20 17:45:46,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:45:46,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:45:46,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:45:47,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:45:47,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:45:47,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492529281] [2024-11-20 17:45:47,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492529281] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:45:47,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395580646] [2024-11-20 17:45:47,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:45:47,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:45:47,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:45:47,047 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) [2024-11-20 17:45:47,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-20 17:45:47,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:45:47,108 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-20 17:45:47,109 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:45:47,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:45:47,165 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:45:47,229 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 [2024-11-20 17:45:47,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:45:47,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395580646] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:45:47,246 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:45:47,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-20 17:45:47,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791369475] [2024-11-20 17:45:47,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:45:47,248 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-20 17:45:47,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:45:47,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-20 17:45:47,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-20 17:45:47,293 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-11-20 17:45:47,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 38 transitions, 105 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 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) [2024-11-20 17:45:47,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:45:47,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-11-20 17:45:47,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:45:47,779 INFO L124 PetriNetUnfolderBase]: 1583/2381 cut-off events. [2024-11-20 17:45:47,779 INFO L125 PetriNetUnfolderBase]: For 495/554 co-relation queries the response was YES. [2024-11-20 17:45:47,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5224 conditions, 2381 events. 1583/2381 cut-off events. For 495/554 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 12067 event pairs, 841 based on Foata normal form. 0/2057 useless extension candidates. Maximal degree in co-relation 3615. Up to 987 conditions per place. [2024-11-20 17:45:47,795 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 78 selfloop transitions, 9 changer transitions 0/91 dead transitions. [2024-11-20 17:45:47,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 91 transitions, 397 flow [2024-11-20 17:45:47,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 17:45:47,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-20 17:45:47,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 158 transitions. [2024-11-20 17:45:47,797 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.512987012987013 [2024-11-20 17:45:47,797 INFO L175 Difference]: Start difference. First operand has 42 places, 38 transitions, 105 flow. Second operand 7 states and 158 transitions. [2024-11-20 17:45:47,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 91 transitions, 397 flow [2024-11-20 17:45:47,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 91 transitions, 392 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:45:47,801 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 141 flow [2024-11-20 17:45:47,801 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=141, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2024-11-20 17:45:47,802 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 2 predicate places. [2024-11-20 17:45:47,802 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 141 flow [2024-11-20 17:45:47,802 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 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) [2024-11-20 17:45:47,802 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:45:47,802 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:45:47,812 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-20 17:45:48,008 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-20 17:45:48,009 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-20 17:45:48,009 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:45:48,009 INFO L85 PathProgramCache]: Analyzing trace with hash 809084184, now seen corresponding path program 1 times [2024-11-20 17:45:48,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:45:48,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622881522] [2024-11-20 17:45:48,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:45:48,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:45:48,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:45:48,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:45:48,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:45:48,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622881522] [2024-11-20 17:45:48,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622881522] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:45:48,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:45:48,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 17:45:48,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504109023] [2024-11-20 17:45:48,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:45:48,092 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:45:48,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:45:48,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:45:48,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 17:45:48,107 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-11-20 17:45:48,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 141 flow. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 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) [2024-11-20 17:45:48,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:45:48,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-11-20 17:45:48,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:45:48,371 INFO L124 PetriNetUnfolderBase]: 1597/2360 cut-off events. [2024-11-20 17:45:48,371 INFO L125 PetriNetUnfolderBase]: For 2106/2237 co-relation queries the response was YES. [2024-11-20 17:45:48,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6009 conditions, 2360 events. 1597/2360 cut-off events. For 2106/2237 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 10917 event pairs, 1152 based on Foata normal form. 0/2062 useless extension candidates. Maximal degree in co-relation 5089. Up to 1932 conditions per place. [2024-11-20 17:45:48,388 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 61 selfloop transitions, 5 changer transitions 0/69 dead transitions. [2024-11-20 17:45:48,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 69 transitions, 345 flow [2024-11-20 17:45:48,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:45:48,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:45:48,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 109 transitions. [2024-11-20 17:45:48,389 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4954545454545455 [2024-11-20 17:45:48,389 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 141 flow. Second operand 5 states and 109 transitions. [2024-11-20 17:45:48,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 69 transitions, 345 flow [2024-11-20 17:45:48,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 69 transitions, 331 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-20 17:45:48,392 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 154 flow [2024-11-20 17:45:48,392 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=154, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-11-20 17:45:48,393 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 4 predicate places. [2024-11-20 17:45:48,393 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 154 flow [2024-11-20 17:45:48,393 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 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) [2024-11-20 17:45:48,393 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:45:48,393 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:45:48,394 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-20 17:45:48,394 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-20 17:45:48,394 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:45:48,394 INFO L85 PathProgramCache]: Analyzing trace with hash 133990468, now seen corresponding path program 1 times [2024-11-20 17:45:48,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:45:48,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744653352] [2024-11-20 17:45:48,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:45:48,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:45:48,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:45:48,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:45:48,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:45:48,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744653352] [2024-11-20 17:45:48,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744653352] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:45:48,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:45:48,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 17:45:48,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650875034] [2024-11-20 17:45:48,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:45:48,450 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:45:48,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:45:48,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:45:48,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-20 17:45:48,461 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-11-20 17:45:48,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 154 flow. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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) [2024-11-20 17:45:48,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:45:48,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-11-20 17:45:48,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:45:48,723 INFO L124 PetriNetUnfolderBase]: 1468/2133 cut-off events. [2024-11-20 17:45:48,724 INFO L125 PetriNetUnfolderBase]: For 2057/2277 co-relation queries the response was YES. [2024-11-20 17:45:48,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5737 conditions, 2133 events. 1468/2133 cut-off events. For 2057/2277 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 9754 event pairs, 1104 based on Foata normal form. 0/1872 useless extension candidates. Maximal degree in co-relation 5084. Up to 1890 conditions per place. [2024-11-20 17:45:48,739 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 54 selfloop transitions, 5 changer transitions 0/62 dead transitions. [2024-11-20 17:45:48,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 62 transitions, 332 flow [2024-11-20 17:45:48,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:45:48,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:45:48,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 102 transitions. [2024-11-20 17:45:48,741 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4636363636363636 [2024-11-20 17:45:48,741 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 154 flow. Second operand 5 states and 102 transitions. [2024-11-20 17:45:48,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 62 transitions, 332 flow [2024-11-20 17:45:48,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 62 transitions, 327 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:45:48,745 INFO L231 Difference]: Finished difference. Result has 54 places, 45 transitions, 174 flow [2024-11-20 17:45:48,745 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=174, PETRI_PLACES=54, PETRI_TRANSITIONS=45} [2024-11-20 17:45:48,745 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 8 predicate places. [2024-11-20 17:45:48,746 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 45 transitions, 174 flow [2024-11-20 17:45:48,746 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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) [2024-11-20 17:45:48,746 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:45:48,746 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:45:48,746 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-20 17:45:48,747 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-20 17:45:48,747 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:45:48,747 INFO L85 PathProgramCache]: Analyzing trace with hash 747708802, now seen corresponding path program 1 times [2024-11-20 17:45:48,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:45:48,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923929402] [2024-11-20 17:45:48,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:45:48,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:45:48,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:45:48,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:45:48,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:45:48,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923929402] [2024-11-20 17:45:48,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923929402] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:45:48,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104440686] [2024-11-20 17:45:48,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:45:48,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:45:48,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:45:48,875 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) [2024-11-20 17:45:48,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-20 17:45:48,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:45:48,943 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-20 17:45:48,944 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:45:49,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:45:49,007 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:45:49,054 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 [2024-11-20 17:45:49,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:45:49,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104440686] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:45:49,066 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:45:49,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-20 17:45:49,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707519919] [2024-11-20 17:45:49,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:45:49,066 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-20 17:45:49,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:45:49,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-20 17:45:49,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-20 17:45:49,107 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-11-20 17:45:49,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 45 transitions, 174 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:45:49,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:45:49,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-11-20 17:45:49,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:45:49,644 INFO L124 PetriNetUnfolderBase]: 1811/2718 cut-off events. [2024-11-20 17:45:49,644 INFO L125 PetriNetUnfolderBase]: For 2624/2898 co-relation queries the response was YES. [2024-11-20 17:45:49,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7479 conditions, 2718 events. 1811/2718 cut-off events. For 2624/2898 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 13186 event pairs, 734 based on Foata normal form. 0/2518 useless extension candidates. Maximal degree in co-relation 6735. Up to 1389 conditions per place. [2024-11-20 17:45:49,675 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 79 selfloop transitions, 9 changer transitions 0/92 dead transitions. [2024-11-20 17:45:49,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 92 transitions, 520 flow [2024-11-20 17:45:49,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 17:45:49,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-20 17:45:49,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-11-20 17:45:49,677 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.487012987012987 [2024-11-20 17:45:49,677 INFO L175 Difference]: Start difference. First operand has 54 places, 45 transitions, 174 flow. Second operand 7 states and 150 transitions. [2024-11-20 17:45:49,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 92 transitions, 520 flow [2024-11-20 17:45:49,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 92 transitions, 515 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:45:49,684 INFO L231 Difference]: Finished difference. Result has 60 places, 48 transitions, 210 flow [2024-11-20 17:45:49,684 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=210, PETRI_PLACES=60, PETRI_TRANSITIONS=48} [2024-11-20 17:45:49,685 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 14 predicate places. [2024-11-20 17:45:49,685 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 48 transitions, 210 flow [2024-11-20 17:45:49,685 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:45:49,685 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:45:49,685 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:45:49,694 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-20 17:45:49,886 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 [2024-11-20 17:45:49,886 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-20 17:45:49,887 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:45:49,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1740092478, now seen corresponding path program 1 times [2024-11-20 17:45:49,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:45:49,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836501674] [2024-11-20 17:45:49,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:45:49,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:45:49,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:45:49,984 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:45:49,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:45:49,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836501674] [2024-11-20 17:45:49,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836501674] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:45:49,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110772499] [2024-11-20 17:45:49,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:45:49,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:45:49,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:45:49,987 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) [2024-11-20 17:45:49,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-20 17:45:50,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:45:50,051 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-20 17:45:50,052 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:45:50,129 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:45:50,129 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:45:50,184 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:45:50,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110772499] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:45:50,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:45:50,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-20 17:45:50,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174397982] [2024-11-20 17:45:50,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:45:50,185 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-20 17:45:50,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:45:50,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-20 17:45:50,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-11-20 17:45:50,222 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-11-20 17:45:50,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 48 transitions, 210 flow. Second operand has 14 states, 14 states have (on average 11.0) internal successors, (154), 14 states have internal predecessors, (154), 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) [2024-11-20 17:45:50,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:45:50,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-11-20 17:45:50,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:45:50,851 INFO L124 PetriNetUnfolderBase]: 3628/5286 cut-off events. [2024-11-20 17:45:50,851 INFO L125 PetriNetUnfolderBase]: For 6900/7301 co-relation queries the response was YES. [2024-11-20 17:45:50,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16627 conditions, 5286 events. 3628/5286 cut-off events. For 6900/7301 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 27393 event pairs, 2002 based on Foata normal form. 86/5144 useless extension candidates. Maximal degree in co-relation 9553. Up to 2940 conditions per place. [2024-11-20 17:45:50,894 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 104 selfloop transitions, 13 changer transitions 0/120 dead transitions. [2024-11-20 17:45:50,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 120 transitions, 744 flow [2024-11-20 17:45:50,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-20 17:45:50,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-20 17:45:50,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-11-20 17:45:50,895 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-11-20 17:45:50,895 INFO L175 Difference]: Start difference. First operand has 60 places, 48 transitions, 210 flow. Second operand 8 states and 165 transitions. [2024-11-20 17:45:50,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 120 transitions, 744 flow [2024-11-20 17:45:50,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 120 transitions, 723 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-11-20 17:45:50,908 INFO L231 Difference]: Finished difference. Result has 68 places, 55 transitions, 296 flow [2024-11-20 17:45:50,909 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=296, PETRI_PLACES=68, PETRI_TRANSITIONS=55} [2024-11-20 17:45:50,909 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 22 predicate places. [2024-11-20 17:45:50,910 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 55 transitions, 296 flow [2024-11-20 17:45:50,910 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.0) internal successors, (154), 14 states have internal predecessors, (154), 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) [2024-11-20 17:45:50,910 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:45:50,910 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:45:50,919 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-20 17:45:51,114 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 [2024-11-20 17:45:51,115 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-20 17:45:51,115 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:45:51,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1281790510, now seen corresponding path program 1 times [2024-11-20 17:45:51,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:45:51,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756426503] [2024-11-20 17:45:51,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:45:51,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:45:51,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:45:51,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:45:51,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:45:51,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756426503] [2024-11-20 17:45:51,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756426503] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:45:51,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045572875] [2024-11-20 17:45:51,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:45:51,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:45:51,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:45:51,322 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) [2024-11-20 17:45:51,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-20 17:45:51,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:45:51,392 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-20 17:45:51,393 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:45:51,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:45:51,543 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-20 17:45:51,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045572875] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:45:51,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-20 17:45:51,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2024-11-20 17:45:51,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257079259] [2024-11-20 17:45:51,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:45:51,544 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-20 17:45:51,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:45:51,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-20 17:45:51,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-11-20 17:45:51,584 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-11-20 17:45:51,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 55 transitions, 296 flow. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 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) [2024-11-20 17:45:51,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:45:51,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-11-20 17:45:51,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:45:52,118 INFO L124 PetriNetUnfolderBase]: 2977/4337 cut-off events. [2024-11-20 17:45:52,119 INFO L125 PetriNetUnfolderBase]: For 10587/11050 co-relation queries the response was YES. [2024-11-20 17:45:52,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15037 conditions, 4337 events. 2977/4337 cut-off events. For 10587/11050 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 21635 event pairs, 999 based on Foata normal form. 0/4148 useless extension candidates. Maximal degree in co-relation 8070. Up to 1920 conditions per place. [2024-11-20 17:45:52,150 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 91 selfloop transitions, 10 changer transitions 0/104 dead transitions. [2024-11-20 17:45:52,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 104 transitions, 816 flow [2024-11-20 17:45:52,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 17:45:52,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-20 17:45:52,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-11-20 17:45:52,152 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-11-20 17:45:52,152 INFO L175 Difference]: Start difference. First operand has 68 places, 55 transitions, 296 flow. Second operand 6 states and 110 transitions. [2024-11-20 17:45:52,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 104 transitions, 816 flow [2024-11-20 17:45:52,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 104 transitions, 801 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-11-20 17:45:52,163 INFO L231 Difference]: Finished difference. Result has 71 places, 54 transitions, 307 flow [2024-11-20 17:45:52,163 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=307, PETRI_PLACES=71, PETRI_TRANSITIONS=54} [2024-11-20 17:45:52,164 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 25 predicate places. [2024-11-20 17:45:52,164 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 54 transitions, 307 flow [2024-11-20 17:45:52,164 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 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) [2024-11-20 17:45:52,164 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:45:52,164 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:45:52,173 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-20 17:45:52,365 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 [2024-11-20 17:45:52,365 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-20 17:45:52,366 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:45:52,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1293148760, now seen corresponding path program 1 times [2024-11-20 17:45:52,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:45:52,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41293139] [2024-11-20 17:45:52,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:45:52,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:45:52,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:45:52,475 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:45:52,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:45:52,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41293139] [2024-11-20 17:45:52,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41293139] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:45:52,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608984973] [2024-11-20 17:45:52,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:45:52,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:45:52,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:45:52,478 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) [2024-11-20 17:45:52,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-20 17:45:52,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:45:52,548 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-20 17:45:52,550 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:45:52,653 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:45:52,653 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:45:52,721 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:45:52,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608984973] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:45:52,722 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:45:52,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2024-11-20 17:45:52,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818831306] [2024-11-20 17:45:52,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:45:52,723 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-20 17:45:52,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:45:52,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-20 17:45:52,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2024-11-20 17:45:52,771 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-11-20 17:45:52,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 54 transitions, 307 flow. Second operand has 15 states, 15 states have (on average 11.2) internal successors, (168), 15 states have internal predecessors, (168), 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) [2024-11-20 17:45:52,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:45:52,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-11-20 17:45:52,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:45:53,365 INFO L124 PetriNetUnfolderBase]: 2677/3909 cut-off events. [2024-11-20 17:45:53,366 INFO L125 PetriNetUnfolderBase]: For 8890/9310 co-relation queries the response was YES. [2024-11-20 17:45:53,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13915 conditions, 3909 events. 2677/3909 cut-off events. For 8890/9310 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 18596 event pairs, 1549 based on Foata normal form. 54/3960 useless extension candidates. Maximal degree in co-relation 8743. Up to 2459 conditions per place. [2024-11-20 17:45:53,393 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 89 selfloop transitions, 13 changer transitions 0/105 dead transitions. [2024-11-20 17:45:53,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 105 transitions, 767 flow [2024-11-20 17:45:53,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-20 17:45:53,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-20 17:45:53,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-11-20 17:45:53,394 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-11-20 17:45:53,394 INFO L175 Difference]: Start difference. First operand has 71 places, 54 transitions, 307 flow. Second operand 8 states and 156 transitions. [2024-11-20 17:45:53,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 105 transitions, 767 flow [2024-11-20 17:45:53,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 105 transitions, 725 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-20 17:45:53,407 INFO L231 Difference]: Finished difference. Result has 76 places, 58 transitions, 363 flow [2024-11-20 17:45:53,407 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=363, PETRI_PLACES=76, PETRI_TRANSITIONS=58} [2024-11-20 17:45:53,410 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 30 predicate places. [2024-11-20 17:45:53,411 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 58 transitions, 363 flow [2024-11-20 17:45:53,411 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 11.2) internal successors, (168), 15 states have internal predecessors, (168), 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) [2024-11-20 17:45:53,411 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:45:53,411 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:45:53,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-20 17:45:53,611 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 [2024-11-20 17:45:53,612 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-20 17:45:53,612 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:45:53,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1332811884, now seen corresponding path program 2 times [2024-11-20 17:45:53,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:45:53,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380540314] [2024-11-20 17:45:53,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:45:53,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:45:53,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:45:53,808 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:45:53,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:45:53,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380540314] [2024-11-20 17:45:53,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380540314] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:45:53,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911709543] [2024-11-20 17:45:53,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 17:45:53,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:45:53,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:45:53,810 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) [2024-11-20 17:45:53,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-20 17:45:53,879 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 17:45:53,879 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:45:53,880 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-20 17:45:53,882 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:45:53,899 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-20 17:45:54,161 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 17:45:54,162 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:45:54,417 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 17:45:54,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911709543] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:45:54,418 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:45:54,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2024-11-20 17:45:54,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420887762] [2024-11-20 17:45:54,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:45:54,419 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-20 17:45:54,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:45:54,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-20 17:45:54,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2024-11-20 17:45:54,598 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-11-20 17:45:54,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 58 transitions, 363 flow. Second operand has 18 states, 18 states have (on average 10.944444444444445) internal successors, (197), 18 states have internal predecessors, (197), 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) [2024-11-20 17:45:54,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:45:54,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-11-20 17:45:54,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:45:56,109 INFO L124 PetriNetUnfolderBase]: 2903/4192 cut-off events. [2024-11-20 17:45:56,109 INFO L125 PetriNetUnfolderBase]: For 10202/10699 co-relation queries the response was YES. [2024-11-20 17:45:56,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15392 conditions, 4192 events. 2903/4192 cut-off events. For 10202/10699 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 20544 event pairs, 499 based on Foata normal form. 72/4260 useless extension candidates. Maximal degree in co-relation 9881. Up to 828 conditions per place. [2024-11-20 17:45:56,141 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 172 selfloop transitions, 20 changer transitions 0/195 dead transitions. [2024-11-20 17:45:56,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 195 transitions, 1370 flow [2024-11-20 17:45:56,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-20 17:45:56,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-20 17:45:56,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 290 transitions. [2024-11-20 17:45:56,143 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4707792207792208 [2024-11-20 17:45:56,143 INFO L175 Difference]: Start difference. First operand has 76 places, 58 transitions, 363 flow. Second operand 14 states and 290 transitions. [2024-11-20 17:45:56,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 195 transitions, 1370 flow [2024-11-20 17:45:56,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 195 transitions, 1342 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-11-20 17:45:56,164 INFO L231 Difference]: Finished difference. Result has 86 places, 60 transitions, 415 flow [2024-11-20 17:45:56,165 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=343, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=415, PETRI_PLACES=86, PETRI_TRANSITIONS=60} [2024-11-20 17:45:56,165 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 40 predicate places. [2024-11-20 17:45:56,167 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 60 transitions, 415 flow [2024-11-20 17:45:56,168 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 10.944444444444445) internal successors, (197), 18 states have internal predecessors, (197), 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) [2024-11-20 17:45:56,168 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:45:56,168 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:45:56,176 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-20 17:45:56,368 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 [2024-11-20 17:45:56,369 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-20 17:45:56,370 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:45:56,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1125410770, now seen corresponding path program 2 times [2024-11-20 17:45:56,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:45:56,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296852955] [2024-11-20 17:45:56,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:45:56,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:45:56,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:45:56,619 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:45:56,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:45:56,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296852955] [2024-11-20 17:45:56,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296852955] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:45:56,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475275671] [2024-11-20 17:45:56,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 17:45:56,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:45:56,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:45:56,623 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) [2024-11-20 17:45:56,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-20 17:45:56,687 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 17:45:56,687 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:45:56,688 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-20 17:45:56,689 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:45:56,825 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:45:56,825 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:45:56,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-20 17:45:56,978 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:45:56,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475275671] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:45:56,978 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:45:56,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2024-11-20 17:45:56,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120468620] [2024-11-20 17:45:56,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:45:56,979 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-20 17:45:56,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:45:56,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-20 17:45:56,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2024-11-20 17:45:57,127 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-11-20 17:45:57,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 60 transitions, 415 flow. Second operand has 20 states, 20 states have (on average 11.2) internal successors, (224), 20 states have internal predecessors, (224), 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) [2024-11-20 17:45:57,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:45:57,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-11-20 17:45:57,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:45:58,455 INFO L124 PetriNetUnfolderBase]: 3482/4995 cut-off events. [2024-11-20 17:45:58,455 INFO L125 PetriNetUnfolderBase]: For 16484/17289 co-relation queries the response was YES. [2024-11-20 17:45:58,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19366 conditions, 4995 events. 3482/4995 cut-off events. For 16484/17289 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 23288 event pairs, 557 based on Foata normal form. 234/5225 useless extension candidates. Maximal degree in co-relation 13568. Up to 909 conditions per place. [2024-11-20 17:45:58,497 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 162 selfloop transitions, 21 changer transitions 0/188 dead transitions. [2024-11-20 17:45:58,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 188 transitions, 1485 flow [2024-11-20 17:45:58,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-20 17:45:58,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-20 17:45:58,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 277 transitions. [2024-11-20 17:45:58,498 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4496753246753247 [2024-11-20 17:45:58,499 INFO L175 Difference]: Start difference. First operand has 86 places, 60 transitions, 415 flow. Second operand 14 states and 277 transitions. [2024-11-20 17:45:58,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 188 transitions, 1485 flow [2024-11-20 17:45:58,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 188 transitions, 1294 flow, removed 39 selfloop flow, removed 10 redundant places. [2024-11-20 17:45:58,519 INFO L231 Difference]: Finished difference. Result has 90 places, 63 transitions, 427 flow [2024-11-20 17:45:58,520 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=347, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=427, PETRI_PLACES=90, PETRI_TRANSITIONS=63} [2024-11-20 17:45:58,521 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 44 predicate places. [2024-11-20 17:45:58,521 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 63 transitions, 427 flow [2024-11-20 17:45:58,521 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 11.2) internal successors, (224), 20 states have internal predecessors, (224), 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) [2024-11-20 17:45:58,521 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:45:58,521 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:45:58,529 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-20 17:45:58,721 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 [2024-11-20 17:45:58,722 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-20 17:45:58,722 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:45:58,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1413948225, now seen corresponding path program 1 times [2024-11-20 17:45:58,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:45:58,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905737628] [2024-11-20 17:45:58,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:45:58,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:45:58,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:45:58,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:45:58,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:45:58,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905737628] [2024-11-20 17:45:58,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905737628] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:45:58,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:45:58,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 17:45:58,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554129147] [2024-11-20 17:45:58,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:45:58,770 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:45:58,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:45:58,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:45:58,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:45:58,771 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-11-20 17:45:58,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 63 transitions, 427 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) [2024-11-20 17:45:58,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:45:58,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-11-20 17:45:58,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:45:59,152 INFO L124 PetriNetUnfolderBase]: 2982/4507 cut-off events. [2024-11-20 17:45:59,153 INFO L125 PetriNetUnfolderBase]: For 15282/15967 co-relation queries the response was YES. [2024-11-20 17:45:59,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17499 conditions, 4507 events. 2982/4507 cut-off events. For 15282/15967 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 22101 event pairs, 744 based on Foata normal form. 29/4515 useless extension candidates. Maximal degree in co-relation 11749. Up to 3550 conditions per place. [2024-11-20 17:45:59,185 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 64 selfloop transitions, 4 changer transitions 8/84 dead transitions. [2024-11-20 17:45:59,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 84 transitions, 702 flow [2024-11-20 17:45:59,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:45:59,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:45:59,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 74 transitions. [2024-11-20 17:45:59,187 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5606060606060606 [2024-11-20 17:45:59,187 INFO L175 Difference]: Start difference. First operand has 90 places, 63 transitions, 427 flow. Second operand 3 states and 74 transitions. [2024-11-20 17:45:59,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 84 transitions, 702 flow [2024-11-20 17:45:59,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 84 transitions, 625 flow, removed 12 selfloop flow, removed 10 redundant places. [2024-11-20 17:45:59,210 INFO L231 Difference]: Finished difference. Result has 83 places, 59 transitions, 343 flow [2024-11-20 17:45:59,210 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=343, PETRI_PLACES=83, PETRI_TRANSITIONS=59} [2024-11-20 17:45:59,212 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 37 predicate places. [2024-11-20 17:45:59,212 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 59 transitions, 343 flow [2024-11-20 17:45:59,212 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) [2024-11-20 17:45:59,212 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:45:59,213 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] [2024-11-20 17:45:59,213 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-20 17:45:59,213 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-20 17:45:59,213 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:45:59,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1719107638, now seen corresponding path program 1 times [2024-11-20 17:45:59,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:45:59,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130072542] [2024-11-20 17:45:59,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:45:59,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:45:59,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:45:59,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:45:59,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:45:59,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130072542] [2024-11-20 17:45:59,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130072542] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:45:59,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076625632] [2024-11-20 17:45:59,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:45:59,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:45:59,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:45:59,324 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) [2024-11-20 17:45:59,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-20 17:45:59,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:45:59,406 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-20 17:45:59,408 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:45:59,480 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:45:59,480 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:45:59,545 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:45:59,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076625632] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-20 17:45:59,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-20 17:45:59,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2024-11-20 17:45:59,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958513354] [2024-11-20 17:45:59,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:45:59,546 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-20 17:45:59,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:45:59,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-20 17:45:59,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-11-20 17:45:59,568 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-11-20 17:45:59,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 59 transitions, 343 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:45:59,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:45:59,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-11-20 17:45:59,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:46:00,183 INFO L124 PetriNetUnfolderBase]: 4798/6881 cut-off events. [2024-11-20 17:46:00,184 INFO L125 PetriNetUnfolderBase]: For 17135/17730 co-relation queries the response was YES. [2024-11-20 17:46:00,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25305 conditions, 6881 events. 4798/6881 cut-off events. For 17135/17730 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 34580 event pairs, 1232 based on Foata normal form. 50/6458 useless extension candidates. Maximal degree in co-relation 18143. Up to 2532 conditions per place. [2024-11-20 17:46:00,286 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 150 selfloop transitions, 21 changer transitions 0/175 dead transitions. [2024-11-20 17:46:00,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 175 transitions, 1394 flow [2024-11-20 17:46:00,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 17:46:00,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-20 17:46:00,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-11-20 17:46:00,291 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-11-20 17:46:00,291 INFO L175 Difference]: Start difference. First operand has 83 places, 59 transitions, 343 flow. Second operand 9 states and 165 transitions. [2024-11-20 17:46:00,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 175 transitions, 1394 flow [2024-11-20 17:46:00,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 175 transitions, 1250 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-11-20 17:46:00,333 INFO L231 Difference]: Finished difference. Result has 80 places, 71 transitions, 410 flow [2024-11-20 17:46:00,334 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=410, PETRI_PLACES=80, PETRI_TRANSITIONS=71} [2024-11-20 17:46:00,334 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 34 predicate places. [2024-11-20 17:46:00,334 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 71 transitions, 410 flow [2024-11-20 17:46:00,335 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:46:00,335 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:46:00,335 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] [2024-11-20 17:46:00,343 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-20 17:46:00,535 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 [2024-11-20 17:46:00,536 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-20 17:46:00,536 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:46:00,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1758632884, now seen corresponding path program 2 times [2024-11-20 17:46:00,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:46:00,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551586145] [2024-11-20 17:46:00,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:46:00,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:46:00,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:46:00,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:46:00,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:46:00,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551586145] [2024-11-20 17:46:00,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551586145] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:46:00,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310808533] [2024-11-20 17:46:00,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 17:46:00,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:46:00,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:46:00,680 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) [2024-11-20 17:46:00,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-20 17:46:00,759 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 17:46:00,759 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:46:00,760 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-20 17:46:00,761 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:46:00,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:46:00,821 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:46:00,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:46:00,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310808533] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:46:00,893 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:46:00,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2024-11-20 17:46:00,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159817017] [2024-11-20 17:46:00,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:46:00,894 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-20 17:46:00,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:46:00,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-20 17:46:00,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-11-20 17:46:00,930 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-11-20 17:46:00,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 71 transitions, 410 flow. Second operand has 14 states, 14 states have (on average 10.642857142857142) internal successors, (149), 14 states have internal predecessors, (149), 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) [2024-11-20 17:46:00,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:46:00,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-11-20 17:46:00,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:46:02,038 INFO L124 PetriNetUnfolderBase]: 7451/10707 cut-off events. [2024-11-20 17:46:02,038 INFO L125 PetriNetUnfolderBase]: For 21066/21292 co-relation queries the response was YES. [2024-11-20 17:46:02,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37997 conditions, 10707 events. 7451/10707 cut-off events. For 21066/21292 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 56634 event pairs, 1049 based on Foata normal form. 40/10565 useless extension candidates. Maximal degree in co-relation 27722. Up to 2288 conditions per place. [2024-11-20 17:46:02,095 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 211 selfloop transitions, 59 changer transitions 0/274 dead transitions. [2024-11-20 17:46:02,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 274 transitions, 2127 flow [2024-11-20 17:46:02,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-20 17:46:02,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-20 17:46:02,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 229 transitions. [2024-11-20 17:46:02,098 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3717532467532468 [2024-11-20 17:46:02,098 INFO L175 Difference]: Start difference. First operand has 80 places, 71 transitions, 410 flow. Second operand 14 states and 229 transitions. [2024-11-20 17:46:02,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 274 transitions, 2127 flow [2024-11-20 17:46:02,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 274 transitions, 2124 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:46:02,157 INFO L231 Difference]: Finished difference. Result has 97 places, 113 transitions, 893 flow [2024-11-20 17:46:02,158 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=407, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=893, PETRI_PLACES=97, PETRI_TRANSITIONS=113} [2024-11-20 17:46:02,158 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 51 predicate places. [2024-11-20 17:46:02,159 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 113 transitions, 893 flow [2024-11-20 17:46:02,159 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 10.642857142857142) internal successors, (149), 14 states have internal predecessors, (149), 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) [2024-11-20 17:46:02,159 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:46:02,159 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] [2024-11-20 17:46:02,168 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-20 17:46:02,360 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 [2024-11-20 17:46:02,360 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-20 17:46:02,361 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:46:02,361 INFO L85 PathProgramCache]: Analyzing trace with hash 643348074, now seen corresponding path program 3 times [2024-11-20 17:46:02,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:46:02,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285053470] [2024-11-20 17:46:02,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:46:02,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:46:02,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:46:02,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:46:02,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:46:02,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285053470] [2024-11-20 17:46:02,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285053470] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:46:02,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161012917] [2024-11-20 17:46:02,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 17:46:02,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:46:02,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:46:02,481 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) [2024-11-20 17:46:02,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-20 17:46:02,556 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-20 17:46:02,556 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:46:02,557 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-20 17:46:02,562 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:46:02,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:46:02,629 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:46:02,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:46:02,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161012917] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:46:02,689 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:46:02,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2024-11-20 17:46:02,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33057393] [2024-11-20 17:46:02,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:46:02,689 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-20 17:46:02,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:46:02,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-20 17:46:02,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2024-11-20 17:46:02,738 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-11-20 17:46:02,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 113 transitions, 893 flow. Second operand has 15 states, 15 states have (on average 11.133333333333333) internal successors, (167), 15 states have internal predecessors, (167), 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) [2024-11-20 17:46:02,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:46:02,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-11-20 17:46:02,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:46:04,401 INFO L124 PetriNetUnfolderBase]: 10525/15049 cut-off events. [2024-11-20 17:46:04,401 INFO L125 PetriNetUnfolderBase]: For 48646/49034 co-relation queries the response was YES. [2024-11-20 17:46:04,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63117 conditions, 15049 events. 10525/15049 cut-off events. For 48646/49034 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 82706 event pairs, 1913 based on Foata normal form. 112/15159 useless extension candidates. Maximal degree in co-relation 56495. Up to 4534 conditions per place. [2024-11-20 17:46:04,642 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 229 selfloop transitions, 104 changer transitions 0/337 dead transitions. [2024-11-20 17:46:04,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 337 transitions, 3046 flow [2024-11-20 17:46:04,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-20 17:46:04,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-20 17:46:04,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 264 transitions. [2024-11-20 17:46:04,645 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-11-20 17:46:04,645 INFO L175 Difference]: Start difference. First operand has 97 places, 113 transitions, 893 flow. Second operand 15 states and 264 transitions. [2024-11-20 17:46:04,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 337 transitions, 3046 flow [2024-11-20 17:46:04,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 337 transitions, 3018 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-11-20 17:46:04,868 INFO L231 Difference]: Finished difference. Result has 114 places, 165 transitions, 1787 flow [2024-11-20 17:46:04,868 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=877, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1787, PETRI_PLACES=114, PETRI_TRANSITIONS=165} [2024-11-20 17:46:04,868 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 68 predicate places. [2024-11-20 17:46:04,869 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 165 transitions, 1787 flow [2024-11-20 17:46:04,869 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 11.133333333333333) internal successors, (167), 15 states have internal predecessors, (167), 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) [2024-11-20 17:46:04,869 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:46:04,869 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] [2024-11-20 17:46:04,878 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-20 17:46:05,070 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 [2024-11-20 17:46:05,070 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-20 17:46:05,070 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:46:05,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1558054896, now seen corresponding path program 4 times [2024-11-20 17:46:05,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:46:05,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586715013] [2024-11-20 17:46:05,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:46:05,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:46:05,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:46:05,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:46:05,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:46:05,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586715013] [2024-11-20 17:46:05,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586715013] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:46:05,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510307335] [2024-11-20 17:46:05,175 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-20 17:46:05,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:46:05,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:46:05,178 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) [2024-11-20 17:46:05,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-20 17:46:05,244 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-20 17:46:05,244 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:46:05,245 INFO L255 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-20 17:46:05,246 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:46:05,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:46:05,315 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:46:05,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:46:05,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510307335] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:46:05,374 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:46:05,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-20 17:46:05,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857228892] [2024-11-20 17:46:05,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:46:05,374 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-20 17:46:05,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:46:05,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-20 17:46:05,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-11-20 17:46:05,410 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 44 [2024-11-20 17:46:05,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 165 transitions, 1787 flow. Second operand has 14 states, 14 states have (on average 9.785714285714286) internal successors, (137), 14 states have internal predecessors, (137), 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) [2024-11-20 17:46:05,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:46:05,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 44 [2024-11-20 17:46:05,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:46:07,899 INFO L124 PetriNetUnfolderBase]: 13345/18907 cut-off events. [2024-11-20 17:46:07,899 INFO L125 PetriNetUnfolderBase]: For 95643/95643 co-relation queries the response was YES. [2024-11-20 17:46:07,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90791 conditions, 18907 events. 13345/18907 cut-off events. For 95643/95643 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 101649 event pairs, 1267 based on Foata normal form. 42/18591 useless extension candidates. Maximal degree in co-relation 82522. Up to 3126 conditions per place. [2024-11-20 17:46:08,032 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 367 selfloop transitions, 264 changer transitions 0/632 dead transitions. [2024-11-20 17:46:08,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 632 transitions, 6835 flow [2024-11-20 17:46:08,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-20 17:46:08,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-11-20 17:46:08,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 427 transitions. [2024-11-20 17:46:08,034 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3732517482517482 [2024-11-20 17:46:08,034 INFO L175 Difference]: Start difference. First operand has 114 places, 165 transitions, 1787 flow. Second operand 26 states and 427 transitions. [2024-11-20 17:46:08,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 632 transitions, 6835 flow [2024-11-20 17:46:08,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 632 transitions, 6563 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-11-20 17:46:08,639 INFO L231 Difference]: Finished difference. Result has 143 places, 351 transitions, 4292 flow [2024-11-20 17:46:08,640 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1667, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=4292, PETRI_PLACES=143, PETRI_TRANSITIONS=351} [2024-11-20 17:46:08,640 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 97 predicate places. [2024-11-20 17:46:08,640 INFO L471 AbstractCegarLoop]: Abstraction has has 143 places, 351 transitions, 4292 flow [2024-11-20 17:46:08,640 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.785714285714286) internal successors, (137), 14 states have internal predecessors, (137), 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) [2024-11-20 17:46:08,641 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:46:08,641 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] [2024-11-20 17:46:08,649 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-20 17:46:08,841 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 [2024-11-20 17:46:08,842 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-20 17:46:08,842 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:46:08,842 INFO L85 PathProgramCache]: Analyzing trace with hash -2075377812, now seen corresponding path program 5 times [2024-11-20 17:46:08,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:46:08,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582949944] [2024-11-20 17:46:08,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:46:08,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:46:08,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:46:08,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:46:08,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:46:08,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582949944] [2024-11-20 17:46:08,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582949944] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:46:08,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482438100] [2024-11-20 17:46:08,961 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-20 17:46:08,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:46:08,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:46:08,963 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) [2024-11-20 17:46:08,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-20 17:46:09,045 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 17:46:09,046 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:46:09,047 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-20 17:46:09,048 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:46:09,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:46:09,115 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:46:09,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:46:09,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482438100] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:46:09,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:46:09,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-11-20 17:46:09,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135944760] [2024-11-20 17:46:09,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:46:09,167 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-20 17:46:09,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:46:09,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-20 17:46:09,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2024-11-20 17:46:09,215 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 44 [2024-11-20 17:46:09,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 351 transitions, 4292 flow. Second operand has 15 states, 15 states have (on average 10.133333333333333) internal successors, (152), 15 states have internal predecessors, (152), 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) [2024-11-20 17:46:09,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:46:09,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 44 [2024-11-20 17:46:09,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:46:12,650 INFO L124 PetriNetUnfolderBase]: 14993/21184 cut-off events. [2024-11-20 17:46:12,650 INFO L125 PetriNetUnfolderBase]: For 128087/128087 co-relation queries the response was YES. [2024-11-20 17:46:12,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110635 conditions, 21184 events. 14993/21184 cut-off events. For 128087/128087 co-relation queries the response was YES. Maximal size of possible extension queue 587. Compared 115834 event pairs, 1542 based on Foata normal form. 38/21222 useless extension candidates. Maximal degree in co-relation 107997. Up to 3980 conditions per place. [2024-11-20 17:46:12,855 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 262 selfloop transitions, 512 changer transitions 0/775 dead transitions. [2024-11-20 17:46:12,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 775 transitions, 9357 flow [2024-11-20 17:46:12,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-20 17:46:12,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-11-20 17:46:12,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 371 transitions. [2024-11-20 17:46:12,857 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38326446280991733 [2024-11-20 17:46:12,857 INFO L175 Difference]: Start difference. First operand has 143 places, 351 transitions, 4292 flow. Second operand 22 states and 371 transitions. [2024-11-20 17:46:12,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 775 transitions, 9357 flow [2024-11-20 17:46:14,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 775 transitions, 9202 flow, removed 48 selfloop flow, removed 4 redundant places. [2024-11-20 17:46:14,172 INFO L231 Difference]: Finished difference. Result has 166 places, 607 transitions, 8261 flow [2024-11-20 17:46:14,172 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4122, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=254, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=8261, PETRI_PLACES=166, PETRI_TRANSITIONS=607} [2024-11-20 17:46:14,172 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 120 predicate places. [2024-11-20 17:46:14,173 INFO L471 AbstractCegarLoop]: Abstraction has has 166 places, 607 transitions, 8261 flow [2024-11-20 17:46:14,173 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 10.133333333333333) internal successors, (152), 15 states have internal predecessors, (152), 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) [2024-11-20 17:46:14,173 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:46:14,173 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] [2024-11-20 17:46:14,181 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-20 17:46:14,373 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 [2024-11-20 17:46:14,374 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-20 17:46:14,374 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:46:14,374 INFO L85 PathProgramCache]: Analyzing trace with hash 478094482, now seen corresponding path program 1 times [2024-11-20 17:46:14,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:46:14,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254901618] [2024-11-20 17:46:14,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:46:14,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:46:14,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:46:14,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:46:14,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:46:14,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254901618] [2024-11-20 17:46:14,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254901618] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:46:14,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019522270] [2024-11-20 17:46:14,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:46:14,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:46:14,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:46:14,517 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) [2024-11-20 17:46:14,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-20 17:46:14,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:46:14,601 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-20 17:46:14,602 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:46:14,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:46:14,636 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:46:14,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:46:14,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019522270] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-20 17:46:14,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-20 17:46:14,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2024-11-20 17:46:14,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137042061] [2024-11-20 17:46:14,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:46:14,672 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:46:14,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:46:14,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:46:14,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-11-20 17:46:14,682 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-11-20 17:46:14,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 607 transitions, 8261 flow. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:46:14,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:46:14,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-11-20 17:46:14,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:46:16,934 INFO L124 PetriNetUnfolderBase]: 11194/16296 cut-off events. [2024-11-20 17:46:16,935 INFO L125 PetriNetUnfolderBase]: For 160708/161896 co-relation queries the response was YES. [2024-11-20 17:46:17,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91444 conditions, 16296 events. 11194/16296 cut-off events. For 160708/161896 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 95722 event pairs, 2941 based on Foata normal form. 1222/17258 useless extension candidates. Maximal degree in co-relation 89651. Up to 7739 conditions per place. [2024-11-20 17:46:17,235 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 475 selfloop transitions, 77 changer transitions 0/659 dead transitions. [2024-11-20 17:46:17,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 659 transitions, 10398 flow [2024-11-20 17:46:17,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:46:17,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:46:17,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2024-11-20 17:46:17,236 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-11-20 17:46:17,237 INFO L175 Difference]: Start difference. First operand has 166 places, 607 transitions, 8261 flow. Second operand 5 states and 88 transitions. [2024-11-20 17:46:17,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 659 transitions, 10398 flow [2024-11-20 17:46:18,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 659 transitions, 10135 flow, removed 83 selfloop flow, removed 4 redundant places. [2024-11-20 17:46:18,413 INFO L231 Difference]: Finished difference. Result has 166 places, 538 transitions, 7437 flow [2024-11-20 17:46:18,413 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7197, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=7437, PETRI_PLACES=166, PETRI_TRANSITIONS=538} [2024-11-20 17:46:18,413 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 120 predicate places. [2024-11-20 17:46:18,414 INFO L471 AbstractCegarLoop]: Abstraction has has 166 places, 538 transitions, 7437 flow [2024-11-20 17:46:18,414 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:46:18,414 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:46:18,414 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] [2024-11-20 17:46:18,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-20 17:46:18,614 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:46:18,615 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-20 17:46:18,615 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:46:18,615 INFO L85 PathProgramCache]: Analyzing trace with hash 796470976, now seen corresponding path program 6 times [2024-11-20 17:46:18,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:46:18,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952695493] [2024-11-20 17:46:18,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:46:18,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:46:18,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:46:18,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:46:18,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:46:18,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952695493] [2024-11-20 17:46:18,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952695493] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:46:18,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97794468] [2024-11-20 17:46:18,741 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-20 17:46:18,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:46:18,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:46:18,744 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) [2024-11-20 17:46:18,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-20 17:46:18,829 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-20 17:46:18,829 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:46:18,830 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-20 17:46:18,832 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:46:18,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:46:18,906 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:46:18,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:46:18,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97794468] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-20 17:46:18,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-20 17:46:18,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 15 [2024-11-20 17:46:18,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280200376] [2024-11-20 17:46:18,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:46:18,975 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-20 17:46:18,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:46:18,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-20 17:46:18,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2024-11-20 17:46:18,992 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-11-20 17:46:18,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 538 transitions, 7437 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:46:18,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:46:18,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-11-20 17:46:18,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:46:21,155 INFO L124 PetriNetUnfolderBase]: 10450/14892 cut-off events. [2024-11-20 17:46:21,155 INFO L125 PetriNetUnfolderBase]: For 129569/130155 co-relation queries the response was YES. [2024-11-20 17:46:21,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84401 conditions, 14892 events. 10450/14892 cut-off events. For 129569/130155 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 82522 event pairs, 1045 based on Foata normal form. 238/15118 useless extension candidates. Maximal degree in co-relation 82983. Up to 4724 conditions per place. [2024-11-20 17:46:21,278 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 356 selfloop transitions, 240 changer transitions 0/601 dead transitions. [2024-11-20 17:46:21,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 601 transitions, 9040 flow [2024-11-20 17:46:21,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-20 17:46:21,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-20 17:46:21,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-11-20 17:46:21,279 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4147727272727273 [2024-11-20 17:46:21,279 INFO L175 Difference]: Start difference. First operand has 166 places, 538 transitions, 7437 flow. Second operand 8 states and 146 transitions. [2024-11-20 17:46:21,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 601 transitions, 9040 flow [2024-11-20 17:46:22,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 601 transitions, 8930 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-11-20 17:46:22,421 INFO L231 Difference]: Finished difference. Result has 170 places, 536 transitions, 7879 flow [2024-11-20 17:46:22,421 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7263, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=238, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7879, PETRI_PLACES=170, PETRI_TRANSITIONS=536} [2024-11-20 17:46:22,421 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 124 predicate places. [2024-11-20 17:46:22,422 INFO L471 AbstractCegarLoop]: Abstraction has has 170 places, 536 transitions, 7879 flow [2024-11-20 17:46:22,422 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:46:22,422 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:46:22,422 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, 1, 1] [2024-11-20 17:46:22,428 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-20 17:46:22,622 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:46:22,623 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-20 17:46:22,623 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:46:22,623 INFO L85 PathProgramCache]: Analyzing trace with hash 55025329, now seen corresponding path program 1 times [2024-11-20 17:46:22,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:46:22,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767312989] [2024-11-20 17:46:22,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:46:22,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:46:22,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:46:23,075 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:46:23,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:46:23,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767312989] [2024-11-20 17:46:23,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767312989] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:46:23,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749329461] [2024-11-20 17:46:23,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:46:23,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:46:23,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:46:23,079 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) [2024-11-20 17:46:23,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-20 17:46:23,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:46:23,170 INFO L255 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-20 17:46:23,172 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:46:23,225 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 [2024-11-20 17:46:23,545 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 [2024-11-20 17:46:23,556 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:46:23,556 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:46:23,882 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 33 treesize of output 29 [2024-11-20 17:46:23,896 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 17:46:23,897 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 70 treesize of output 62 [2024-11-20 17:46:24,001 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:46:24,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749329461] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:46:24,002 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:46:24,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 24 [2024-11-20 17:46:24,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879351520] [2024-11-20 17:46:24,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:46:24,002 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-20 17:46:24,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:46:24,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-20 17:46:24,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2024-11-20 17:46:24,214 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-11-20 17:46:24,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 536 transitions, 7879 flow. Second operand has 25 states, 25 states have (on average 11.36) internal successors, (284), 25 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:46:24,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:46:24,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-11-20 17:46:24,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:46:27,164 INFO L124 PetriNetUnfolderBase]: 10599/15413 cut-off events. [2024-11-20 17:46:27,165 INFO L125 PetriNetUnfolderBase]: For 162080/162881 co-relation queries the response was YES. [2024-11-20 17:46:27,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90845 conditions, 15413 events. 10599/15413 cut-off events. For 162080/162881 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 89915 event pairs, 2003 based on Foata normal form. 306/15584 useless extension candidates. Maximal degree in co-relation 88935. Up to 12485 conditions per place. [2024-11-20 17:46:27,306 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 852 selfloop transitions, 148 changer transitions 1/1078 dead transitions. [2024-11-20 17:46:27,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 1078 transitions, 17036 flow [2024-11-20 17:46:27,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-20 17:46:27,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-20 17:46:27,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 329 transitions. [2024-11-20 17:46:27,307 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4154040404040404 [2024-11-20 17:46:27,308 INFO L175 Difference]: Start difference. First operand has 170 places, 536 transitions, 7879 flow. Second operand 18 states and 329 transitions. [2024-11-20 17:46:27,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 1078 transitions, 17036 flow [2024-11-20 17:46:28,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 1078 transitions, 16813 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-11-20 17:46:28,596 INFO L231 Difference]: Finished difference. Result has 189 places, 689 transitions, 10278 flow [2024-11-20 17:46:28,596 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7739, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=10278, PETRI_PLACES=189, PETRI_TRANSITIONS=689} [2024-11-20 17:46:28,597 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 143 predicate places. [2024-11-20 17:46:28,597 INFO L471 AbstractCegarLoop]: Abstraction has has 189 places, 689 transitions, 10278 flow [2024-11-20 17:46:28,597 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 11.36) internal successors, (284), 25 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:46:28,597 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:46:28,597 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, 1, 1] [2024-11-20 17:46:28,604 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-20 17:46:28,798 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,SelfDestructingSolverStorable22 [2024-11-20 17:46:28,798 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-20 17:46:28,798 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:46:28,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1344864535, now seen corresponding path program 2 times [2024-11-20 17:46:28,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:46:28,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718050104] [2024-11-20 17:46:28,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:46:28,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:46:28,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:46:29,164 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:46:29,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:46:29,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718050104] [2024-11-20 17:46:29,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718050104] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:46:29,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545585566] [2024-11-20 17:46:29,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 17:46:29,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:46:29,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:46:29,167 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) [2024-11-20 17:46:29,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-20 17:46:29,249 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 17:46:29,249 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:46:29,251 INFO L255 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-20 17:46:29,252 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:46:29,287 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 [2024-11-20 17:46:29,522 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 [2024-11-20 17:46:29,528 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:46:29,528 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:46:29,891 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 33 treesize of output 29 [2024-11-20 17:46:29,900 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 17:46:29,901 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 70 treesize of output 62 [2024-11-20 17:46:29,976 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:46:29,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545585566] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:46:29,977 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:46:29,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2024-11-20 17:46:29,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251340327] [2024-11-20 17:46:29,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:46:29,978 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-20 17:46:29,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:46:29,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-20 17:46:29,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2024-11-20 17:46:30,134 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-11-20 17:46:30,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 689 transitions, 10278 flow. Second operand has 27 states, 27 states have (on average 11.37037037037037) internal successors, (307), 27 states have internal predecessors, (307), 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) [2024-11-20 17:46:30,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:46:30,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-11-20 17:46:30,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:46:33,488 INFO L124 PetriNetUnfolderBase]: 10749/15752 cut-off events. [2024-11-20 17:46:33,488 INFO L125 PetriNetUnfolderBase]: For 168660/169444 co-relation queries the response was YES. [2024-11-20 17:46:33,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96364 conditions, 15752 events. 10749/15752 cut-off events. For 168660/169444 co-relation queries the response was YES. Maximal size of possible extension queue 585. Compared 93259 event pairs, 2471 based on Foata normal form. 152/15786 useless extension candidates. Maximal degree in co-relation 93727. Up to 14038 conditions per place. [2024-11-20 17:46:33,639 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 677 selfloop transitions, 101 changer transitions 1/892 dead transitions. [2024-11-20 17:46:33,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 892 transitions, 14443 flow [2024-11-20 17:46:33,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-20 17:46:33,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-20 17:46:33,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 207 transitions. [2024-11-20 17:46:33,640 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3618881118881119 [2024-11-20 17:46:33,641 INFO L175 Difference]: Start difference. First operand has 189 places, 689 transitions, 10278 flow. Second operand 13 states and 207 transitions. [2024-11-20 17:46:33,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 892 transitions, 14443 flow [2024-11-20 17:46:35,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 892 transitions, 14341 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-11-20 17:46:35,081 INFO L231 Difference]: Finished difference. Result has 204 places, 774 transitions, 11815 flow [2024-11-20 17:46:35,082 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=10214, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=610, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=11815, PETRI_PLACES=204, PETRI_TRANSITIONS=774} [2024-11-20 17:46:35,082 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 158 predicate places. [2024-11-20 17:46:35,082 INFO L471 AbstractCegarLoop]: Abstraction has has 204 places, 774 transitions, 11815 flow [2024-11-20 17:46:35,082 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 11.37037037037037) internal successors, (307), 27 states have internal predecessors, (307), 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) [2024-11-20 17:46:35,082 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:46:35,083 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, 1, 1] [2024-11-20 17:46:35,089 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-20 17:46:35,283 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:46:35,283 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-20 17:46:35,283 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:46:35,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1116044533, now seen corresponding path program 3 times [2024-11-20 17:46:35,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:46:35,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718852841] [2024-11-20 17:46:35,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:46:35,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:46:35,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:46:35,739 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:46:35,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:46:35,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718852841] [2024-11-20 17:46:35,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718852841] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:46:35,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097090917] [2024-11-20 17:46:35,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 17:46:35,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:46:35,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:46:35,743 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) [2024-11-20 17:46:35,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-20 17:46:35,818 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-20 17:46:35,818 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:46:35,820 INFO L255 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-20 17:46:35,822 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:46:35,865 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 [2024-11-20 17:46:36,109 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 [2024-11-20 17:46:36,119 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:46:36,120 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:46:36,417 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 33 treesize of output 29 [2024-11-20 17:46:36,426 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 17:46:36,427 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 70 treesize of output 62 [2024-11-20 17:46:36,501 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:46:36,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097090917] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:46:36,501 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:46:36,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 24 [2024-11-20 17:46:36,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782960696] [2024-11-20 17:46:36,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:46:36,502 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-20 17:46:36,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:46:36,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-20 17:46:36,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2024-11-20 17:46:36,716 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-11-20 17:46:36,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 774 transitions, 11815 flow. Second operand has 25 states, 25 states have (on average 11.28) internal successors, (282), 25 states have internal predecessors, (282), 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) [2024-11-20 17:46:36,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:46:36,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-11-20 17:46:36,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:46:40,358 INFO L124 PetriNetUnfolderBase]: 11574/17042 cut-off events. [2024-11-20 17:46:40,358 INFO L125 PetriNetUnfolderBase]: For 193134/193938 co-relation queries the response was YES. [2024-11-20 17:46:40,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107803 conditions, 17042 events. 11574/17042 cut-off events. For 193134/193938 co-relation queries the response was YES. Maximal size of possible extension queue 654. Compared 103320 event pairs, 2481 based on Foata normal form. 255/17167 useless extension candidates. Maximal degree in co-relation 105748. Up to 14486 conditions per place. [2024-11-20 17:46:40,622 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 863 selfloop transitions, 141 changer transitions 1/1082 dead transitions. [2024-11-20 17:46:40,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 1082 transitions, 18113 flow [2024-11-20 17:46:40,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-20 17:46:40,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-20 17:46:40,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 277 transitions. [2024-11-20 17:46:40,624 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3934659090909091 [2024-11-20 17:46:40,624 INFO L175 Difference]: Start difference. First operand has 204 places, 774 transitions, 11815 flow. Second operand 16 states and 277 transitions. [2024-11-20 17:46:40,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 1082 transitions, 18113 flow [2024-11-20 17:46:42,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 1082 transitions, 18076 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-11-20 17:46:42,585 INFO L231 Difference]: Finished difference. Result has 222 places, 844 transitions, 13181 flow [2024-11-20 17:46:42,585 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=11790, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=774, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=669, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=13181, PETRI_PLACES=222, PETRI_TRANSITIONS=844} [2024-11-20 17:46:42,586 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 176 predicate places. [2024-11-20 17:46:42,586 INFO L471 AbstractCegarLoop]: Abstraction has has 222 places, 844 transitions, 13181 flow [2024-11-20 17:46:42,586 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 11.28) internal successors, (282), 25 states have internal predecessors, (282), 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) [2024-11-20 17:46:42,586 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:46:42,586 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, 1, 1] [2024-11-20 17:46:42,592 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-20 17:46:42,786 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:46:42,787 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-20 17:46:42,787 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:46:42,787 INFO L85 PathProgramCache]: Analyzing trace with hash -597441042, now seen corresponding path program 1 times [2024-11-20 17:46:42,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:46:42,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573582497] [2024-11-20 17:46:42,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:46:42,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:46:42,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:46:43,039 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:46:43,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:46:43,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573582497] [2024-11-20 17:46:43,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573582497] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:46:43,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782831338] [2024-11-20 17:46:43,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:46:43,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:46:43,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:46:43,042 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) [2024-11-20 17:46:43,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-20 17:46:43,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:46:43,122 INFO L255 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-20 17:46:43,123 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:46:43,198 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 [2024-11-20 17:46:43,205 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:46:43,206 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:46:43,242 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 17:46:43,243 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 19 treesize of output 16 [2024-11-20 17:46:43,266 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:46:43,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782831338] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:46:43,266 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:46:43,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 5] total 15 [2024-11-20 17:46:43,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890478926] [2024-11-20 17:46:43,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:46:43,267 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-20 17:46:43,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:46:43,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-20 17:46:43,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2024-11-20 17:46:43,306 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-11-20 17:46:43,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 844 transitions, 13181 flow. Second operand has 16 states, 16 states have (on average 13.5) internal successors, (216), 16 states have internal predecessors, (216), 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) [2024-11-20 17:46:43,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:46:43,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-11-20 17:46:43,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:46:47,132 INFO L124 PetriNetUnfolderBase]: 12414/18657 cut-off events. [2024-11-20 17:46:47,132 INFO L125 PetriNetUnfolderBase]: For 236752/238115 co-relation queries the response was YES. [2024-11-20 17:46:47,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123585 conditions, 18657 events. 12414/18657 cut-off events. For 236752/238115 co-relation queries the response was YES. Maximal size of possible extension queue 793. Compared 119950 event pairs, 1184 based on Foata normal form. 565/19016 useless extension candidates. Maximal degree in co-relation 121218. Up to 12796 conditions per place. [2024-11-20 17:46:47,397 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 881 selfloop transitions, 251 changer transitions 38/1364 dead transitions. [2024-11-20 17:46:47,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 1364 transitions, 23273 flow [2024-11-20 17:46:47,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-20 17:46:47,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-20 17:46:47,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 232 transitions. [2024-11-20 17:46:47,399 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4793388429752066 [2024-11-20 17:46:47,399 INFO L175 Difference]: Start difference. First operand has 222 places, 844 transitions, 13181 flow. Second operand 11 states and 232 transitions. [2024-11-20 17:46:47,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 1364 transitions, 23273 flow [2024-11-20 17:46:49,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 1364 transitions, 23073 flow, removed 51 selfloop flow, removed 5 redundant places. [2024-11-20 17:46:49,996 INFO L231 Difference]: Finished difference. Result has 233 places, 957 transitions, 15498 flow [2024-11-20 17:46:49,997 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=12987, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=844, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=657, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15498, PETRI_PLACES=233, PETRI_TRANSITIONS=957} [2024-11-20 17:46:49,997 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 187 predicate places. [2024-11-20 17:46:49,997 INFO L471 AbstractCegarLoop]: Abstraction has has 233 places, 957 transitions, 15498 flow [2024-11-20 17:46:49,997 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 13.5) internal successors, (216), 16 states have internal predecessors, (216), 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) [2024-11-20 17:46:49,997 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:46:49,998 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, 1, 1] [2024-11-20 17:46:50,005 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-20 17:46:50,198 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:46:50,198 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-20 17:46:50,198 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:46:50,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1088327956, now seen corresponding path program 2 times [2024-11-20 17:46:50,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:46:50,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205624288] [2024-11-20 17:46:50,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:46:50,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:46:50,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:46:50,611 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:46:50,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:46:50,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205624288] [2024-11-20 17:46:50,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205624288] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:46:50,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151750934] [2024-11-20 17:46:50,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 17:46:50,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:46:50,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:46:50,615 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) [2024-11-20 17:46:50,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-20 17:46:50,696 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 17:46:50,696 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:46:50,697 INFO L255 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-20 17:46:50,700 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:46:50,845 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 [2024-11-20 17:46:50,854 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:46:50,854 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:46:50,888 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 17:46:50,888 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 23 treesize of output 16 [2024-11-20 17:46:50,935 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:46:50,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151750934] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:46:50,935 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:46:50,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 5] total 16 [2024-11-20 17:46:50,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157806596] [2024-11-20 17:46:50,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:46:50,936 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-20 17:46:50,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:46:50,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-20 17:46:50,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2024-11-20 17:46:50,990 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-11-20 17:46:50,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 957 transitions, 15498 flow. Second operand has 17 states, 17 states have (on average 13.411764705882353) internal successors, (228), 17 states have internal predecessors, (228), 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) [2024-11-20 17:46:50,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:46:50,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-11-20 17:46:50,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:46:55,718 INFO L124 PetriNetUnfolderBase]: 14089/21165 cut-off events. [2024-11-20 17:46:55,718 INFO L125 PetriNetUnfolderBase]: For 304305/306085 co-relation queries the response was YES. [2024-11-20 17:46:56,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149275 conditions, 21165 events. 14089/21165 cut-off events. For 304305/306085 co-relation queries the response was YES. Maximal size of possible extension queue 945. Compared 139014 event pairs, 1711 based on Foata normal form. 684/21598 useless extension candidates. Maximal degree in co-relation 146720. Up to 16462 conditions per place. [2024-11-20 17:46:56,219 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 882 selfloop transitions, 215 changer transitions 20/1311 dead transitions. [2024-11-20 17:46:56,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 1311 transitions, 23165 flow [2024-11-20 17:46:56,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 17:46:56,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-20 17:46:56,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-11-20 17:46:56,220 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4671717171717172 [2024-11-20 17:46:56,220 INFO L175 Difference]: Start difference. First operand has 233 places, 957 transitions, 15498 flow. Second operand 9 states and 185 transitions. [2024-11-20 17:46:56,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 1311 transitions, 23165 flow [2024-11-20 17:46:59,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 1311 transitions, 22918 flow, removed 122 selfloop flow, removed 1 redundant places. [2024-11-20 17:46:59,647 INFO L231 Difference]: Finished difference. Result has 244 places, 1056 transitions, 17601 flow [2024-11-20 17:46:59,648 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=15269, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=957, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=768, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=17601, PETRI_PLACES=244, PETRI_TRANSITIONS=1056} [2024-11-20 17:46:59,649 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 198 predicate places. [2024-11-20 17:46:59,649 INFO L471 AbstractCegarLoop]: Abstraction has has 244 places, 1056 transitions, 17601 flow [2024-11-20 17:46:59,649 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 13.411764705882353) internal successors, (228), 17 states have internal predecessors, (228), 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) [2024-11-20 17:46:59,649 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:46:59,649 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, 1, 1] [2024-11-20 17:46:59,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-20 17:46:59,849 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,SelfDestructingSolverStorable26 [2024-11-20 17:46:59,850 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-20 17:46:59,850 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:46:59,850 INFO L85 PathProgramCache]: Analyzing trace with hash 813504363, now seen corresponding path program 4 times [2024-11-20 17:46:59,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:46:59,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755926746] [2024-11-20 17:46:59,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:46:59,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:46:59,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:00,196 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:00,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:00,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755926746] [2024-11-20 17:47:00,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755926746] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:47:00,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569273914] [2024-11-20 17:47:00,196 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-20 17:47:00,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:00,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:47:00,197 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) [2024-11-20 17:47:00,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-20 17:47:00,266 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-20 17:47:00,266 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:47:00,267 INFO L255 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-20 17:47:00,268 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:47:00,304 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 [2024-11-20 17:47:00,511 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 [2024-11-20 17:47:00,520 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:00,520 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:47:00,772 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 33 treesize of output 29 [2024-11-20 17:47:00,779 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 17:47:00,779 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 70 treesize of output 62 [2024-11-20 17:47:00,845 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:00,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569273914] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:47:00,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:47:00,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-11-20 17:47:00,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711069168] [2024-11-20 17:47:00,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:47:00,846 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-20 17:47:00,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:00,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-20 17:47:00,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2024-11-20 17:47:01,077 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-11-20 17:47:01,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 1056 transitions, 17601 flow. Second operand has 24 states, 24 states have (on average 11.458333333333334) internal successors, (275), 24 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:47:01,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:01,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-11-20 17:47:01,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand