./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 3061b6dc Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/popl20-more-sorted.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 39e987e3198040ef6af9e29359b0ab7bee89306d1945f6e4e7a9286ebbe2a705 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-19 09:52:14,318 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 09:52:14,403 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-19 09:52:14,407 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 09:52:14,409 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 09:52:14,448 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 09:52:14,449 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 09:52:14,459 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 09:52:14,460 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 09:52:14,460 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 09:52:14,461 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 09:52:14,461 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 09:52:14,462 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 09:52:14,462 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 09:52:14,462 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 09:52:14,463 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 09:52:14,463 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 09:52:14,463 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 09:52:14,464 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 09:52:14,464 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 09:52:14,464 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-19 09:52:14,465 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-19 09:52:14,465 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-19 09:52:14,466 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 09:52:14,466 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-19 09:52:14,466 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 09:52:14,466 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-19 09:52:14,467 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 09:52:14,467 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 09:52:14,467 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 09:52:14,468 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 09:52:14,468 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 09:52:14,468 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 09:52:14,468 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 09:52:14,469 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 09:52:14,469 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 09:52:14,469 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 09:52:14,470 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 09:52:14,470 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 09:52:14,470 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 09:52:14,470 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 09:52:14,471 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 09:52:14,471 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39e987e3198040ef6af9e29359b0ab7bee89306d1945f6e4e7a9286ebbe2a705 [2024-11-19 09:52:14,690 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 09:52:14,715 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 09:52:14,718 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 09:52:14,720 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 09:52:14,721 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 09:52:14,722 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c [2024-11-19 09:52:16,203 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 09:52:16,390 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 09:52:16,391 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c [2024-11-19 09:52:16,398 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b2ed66e2/41d54332ffe8451ab7ad2cef8893bb63/FLAGf1f9e9ccb [2024-11-19 09:52:16,787 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b2ed66e2/41d54332ffe8451ab7ad2cef8893bb63 [2024-11-19 09:52:16,790 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 09:52:16,792 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 09:52:16,793 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 09:52:16,793 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 09:52:16,798 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 09:52:16,799 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:52:16" (1/1) ... [2024-11-19 09:52:16,802 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30d8ec11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:52:16, skipping insertion in model container [2024-11-19 09:52:16,802 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:52:16" (1/1) ... [2024-11-19 09:52:16,828 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 09:52:17,059 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-19 09:52:17,061 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 09:52:17,069 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 09:52:17,092 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 09:52:17,111 INFO L204 MainTranslator]: Completed translation [2024-11-19 09:52:17,112 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:52:17 WrapperNode [2024-11-19 09:52:17,112 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 09:52:17,113 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 09:52:17,114 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 09:52:17,114 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 09:52:17,120 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:52:17" (1/1) ... [2024-11-19 09:52:17,129 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:52:17" (1/1) ... [2024-11-19 09:52:17,158 INFO L138 Inliner]: procedures = 23, calls = 23, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 92 [2024-11-19 09:52:17,159 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 09:52:17,160 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 09:52:17,160 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 09:52:17,160 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 09:52:17,169 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:52:17" (1/1) ... [2024-11-19 09:52:17,169 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:52:17" (1/1) ... [2024-11-19 09:52:17,172 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:52:17" (1/1) ... [2024-11-19 09:52:17,196 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-19 09:52:17,196 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:52:17" (1/1) ... [2024-11-19 09:52:17,197 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:52:17" (1/1) ... [2024-11-19 09:52:17,211 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:52:17" (1/1) ... [2024-11-19 09:52:17,214 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:52:17" (1/1) ... [2024-11-19 09:52:17,216 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:52:17" (1/1) ... [2024-11-19 09:52:17,218 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:52:17" (1/1) ... [2024-11-19 09:52:17,220 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 09:52:17,221 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 09:52:17,221 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 09:52:17,222 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 09:52:17,222 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:52:17" (1/1) ... [2024-11-19 09:52:17,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 09:52:17,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:52:17,254 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) [2024-11-19 09:52:17,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-19 09:52:17,302 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 09:52:17,303 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-19 09:52:17,303 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-19 09:52:17,303 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-19 09:52:17,303 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-19 09:52:17,303 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-19 09:52:17,303 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-19 09:52:17,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-19 09:52:17,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-19 09:52:17,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-19 09:52:17,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-19 09:52:17,304 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-19 09:52:17,304 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 09:52:17,305 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 09:52:17,305 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-19 09:52:17,305 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-19 09:52:17,306 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-19 09:52:17,401 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 09:52:17,403 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 09:52:17,831 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-19 09:52:17,832 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 09:52:18,017 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 09:52:18,019 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-19 09:52:18,020 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:52:18 BoogieIcfgContainer [2024-11-19 09:52:18,020 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 09:52:18,023 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 09:52:18,023 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 09:52:18,026 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 09:52:18,027 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 09:52:16" (1/3) ... [2024-11-19 09:52:18,027 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36ea7f94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:52:18, skipping insertion in model container [2024-11-19 09:52:18,028 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:52:17" (2/3) ... [2024-11-19 09:52:18,028 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36ea7f94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:52:18, skipping insertion in model container [2024-11-19 09:52:18,028 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:52:18" (3/3) ... [2024-11-19 09:52:18,029 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-sorted.wvr.c [2024-11-19 09:52:18,045 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 09:52:18,046 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2024-11-19 09:52:18,046 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-19 09:52:18,114 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-19 09:52:18,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 62 places, 59 transitions, 139 flow [2024-11-19 09:52:18,185 INFO L124 PetriNetUnfolderBase]: 7/56 cut-off events. [2024-11-19 09:52:18,186 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-19 09:52:18,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 56 events. 7/56 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 140 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 45. Up to 2 conditions per place. [2024-11-19 09:52:18,192 INFO L82 GeneralOperation]: Start removeDead. Operand has 62 places, 59 transitions, 139 flow [2024-11-19 09:52:18,195 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 58 places, 55 transitions, 128 flow [2024-11-19 09:52:18,202 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 09:52:18,208 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;@13c3c758, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 09:52:18,208 INFO L334 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2024-11-19 09:52:18,212 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-19 09:52:18,212 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-19 09:52:18,212 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-19 09:52:18,212 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:52:18,213 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-19 09:52:18,213 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 09:52:18,218 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:52:18,218 INFO L85 PathProgramCache]: Analyzing trace with hash 461494, now seen corresponding path program 1 times [2024-11-19 09:52:18,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:52:18,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302872845] [2024-11-19 09:52:18,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:52:18,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:52:18,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:52:18,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:18,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:52:18,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302872845] [2024-11-19 09:52:18,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302872845] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:52:18,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:52:18,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-19 09:52:18,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727394750] [2024-11-19 09:52:18,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:52:18,473 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:52:18,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:52:18,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:52:18,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:52:18,534 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 59 [2024-11-19 09:52:18,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 55 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:18,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:52:18,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 59 [2024-11-19 09:52:18,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:52:18,934 INFO L124 PetriNetUnfolderBase]: 785/1534 cut-off events. [2024-11-19 09:52:18,934 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2024-11-19 09:52:18,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2678 conditions, 1534 events. 785/1534 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 9339 event pairs, 464 based on Foata normal form. 1/1061 useless extension candidates. Maximal degree in co-relation 2447. Up to 1061 conditions per place. [2024-11-19 09:52:18,955 INFO L140 encePairwiseOnDemand]: 55/59 looper letters, 27 selfloop transitions, 2 changer transitions 0/52 dead transitions. [2024-11-19 09:52:18,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 52 transitions, 180 flow [2024-11-19 09:52:18,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:52:18,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:52:18,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 112 transitions. [2024-11-19 09:52:18,968 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.632768361581921 [2024-11-19 09:52:18,970 INFO L175 Difference]: Start difference. First operand has 58 places, 55 transitions, 128 flow. Second operand 3 states and 112 transitions. [2024-11-19 09:52:18,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 52 transitions, 180 flow [2024-11-19 09:52:18,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 52 transitions, 168 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-19 09:52:18,981 INFO L231 Difference]: Finished difference. Result has 51 places, 52 transitions, 114 flow [2024-11-19 09:52:18,983 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=51, PETRI_TRANSITIONS=52} [2024-11-19 09:52:18,988 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, -7 predicate places. [2024-11-19 09:52:18,988 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 52 transitions, 114 flow [2024-11-19 09:52:18,989 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:18,989 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:52:18,989 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-19 09:52:18,989 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-19 09:52:18,990 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 09:52:18,990 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:52:18,992 INFO L85 PathProgramCache]: Analyzing trace with hash 461495, now seen corresponding path program 1 times [2024-11-19 09:52:18,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:52:18,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107196384] [2024-11-19 09:52:18,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:52:18,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:52:19,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:52:19,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:19,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:52:19,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107196384] [2024-11-19 09:52:19,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107196384] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:52:19,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:52:19,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:52:19,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509304989] [2024-11-19 09:52:19,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:52:19,273 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:52:19,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:52:19,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:52:19,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:52:19,323 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 59 [2024-11-19 09:52:19,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 52 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:19,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:52:19,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 59 [2024-11-19 09:52:19,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:52:19,574 INFO L124 PetriNetUnfolderBase]: 785/1533 cut-off events. [2024-11-19 09:52:19,575 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-11-19 09:52:19,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2626 conditions, 1533 events. 785/1533 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 9338 event pairs, 464 based on Foata normal form. 0/1060 useless extension candidates. Maximal degree in co-relation 2613. Up to 1061 conditions per place. [2024-11-19 09:52:19,587 INFO L140 encePairwiseOnDemand]: 54/59 looper letters, 25 selfloop transitions, 4 changer transitions 0/51 dead transitions. [2024-11-19 09:52:19,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 51 transitions, 170 flow [2024-11-19 09:52:19,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:52:19,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:52:19,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 138 transitions. [2024-11-19 09:52:19,593 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5847457627118644 [2024-11-19 09:52:19,593 INFO L175 Difference]: Start difference. First operand has 51 places, 52 transitions, 114 flow. Second operand 4 states and 138 transitions. [2024-11-19 09:52:19,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 51 transitions, 170 flow [2024-11-19 09:52:19,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 51 transitions, 166 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:52:19,596 INFO L231 Difference]: Finished difference. Result has 51 places, 51 transitions, 116 flow [2024-11-19 09:52:19,597 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=116, PETRI_PLACES=51, PETRI_TRANSITIONS=51} [2024-11-19 09:52:19,598 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, -7 predicate places. [2024-11-19 09:52:19,598 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 51 transitions, 116 flow [2024-11-19 09:52:19,598 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:19,599 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:52:19,599 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:52:19,599 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-19 09:52:19,599 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 09:52:19,600 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:52:19,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1105075391, now seen corresponding path program 1 times [2024-11-19 09:52:19,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:52:19,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908135398] [2024-11-19 09:52:19,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:52:19,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:52:19,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:52:19,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:19,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:52:19,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908135398] [2024-11-19 09:52:19,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908135398] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:52:19,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:52:19,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:52:19,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167370574] [2024-11-19 09:52:19,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:52:19,731 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:52:19,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:52:19,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:52:19,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:52:19,788 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 59 [2024-11-19 09:52:19,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 51 transitions, 116 flow. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:19,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:52:19,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 59 [2024-11-19 09:52:19,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:52:20,061 INFO L124 PetriNetUnfolderBase]: 1354/2149 cut-off events. [2024-11-19 09:52:20,062 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-11-19 09:52:20,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4033 conditions, 2149 events. 1354/2149 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 10708 event pairs, 878 based on Foata normal form. 0/1813 useless extension candidates. Maximal degree in co-relation 4018. Up to 1837 conditions per place. [2024-11-19 09:52:20,079 INFO L140 encePairwiseOnDemand]: 51/59 looper letters, 30 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2024-11-19 09:52:20,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 45 transitions, 168 flow [2024-11-19 09:52:20,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:52:20,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:52:20,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 110 transitions. [2024-11-19 09:52:20,082 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4661016949152542 [2024-11-19 09:52:20,083 INFO L175 Difference]: Start difference. First operand has 51 places, 51 transitions, 116 flow. Second operand 4 states and 110 transitions. [2024-11-19 09:52:20,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 45 transitions, 168 flow [2024-11-19 09:52:20,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 45 transitions, 160 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-19 09:52:20,085 INFO L231 Difference]: Finished difference. Result has 45 places, 45 transitions, 100 flow [2024-11-19 09:52:20,085 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=100, PETRI_PLACES=45, PETRI_TRANSITIONS=45} [2024-11-19 09:52:20,086 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, -13 predicate places. [2024-11-19 09:52:20,086 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 45 transitions, 100 flow [2024-11-19 09:52:20,086 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:20,087 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:52:20,087 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:52:20,087 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-19 09:52:20,088 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 09:52:20,089 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:52:20,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1105075392, now seen corresponding path program 1 times [2024-11-19 09:52:20,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:52:20,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909610051] [2024-11-19 09:52:20,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:52:20,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:52:20,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:52:20,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:20,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:52:20,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909610051] [2024-11-19 09:52:20,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909610051] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:52:20,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:52:20,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:52:20,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141465365] [2024-11-19 09:52:20,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:52:20,208 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:52:20,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:52:20,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:52:20,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:52:20,212 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2024-11-19 09:52:20,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 45 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:20,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:52:20,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2024-11-19 09:52:20,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:52:20,394 INFO L124 PetriNetUnfolderBase]: 785/1401 cut-off events. [2024-11-19 09:52:20,395 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-11-19 09:52:20,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2496 conditions, 1401 events. 785/1401 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 7553 event pairs, 464 based on Foata normal form. 1/1063 useless extension candidates. Maximal degree in co-relation 2479. Up to 1064 conditions per place. [2024-11-19 09:52:20,404 INFO L140 encePairwiseOnDemand]: 56/59 looper letters, 29 selfloop transitions, 2 changer transitions 0/47 dead transitions. [2024-11-19 09:52:20,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 47 transitions, 166 flow [2024-11-19 09:52:20,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:52:20,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:52:20,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 116 transitions. [2024-11-19 09:52:20,407 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.655367231638418 [2024-11-19 09:52:20,407 INFO L175 Difference]: Start difference. First operand has 45 places, 45 transitions, 100 flow. Second operand 3 states and 116 transitions. [2024-11-19 09:52:20,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 47 transitions, 166 flow [2024-11-19 09:52:20,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 47 transitions, 163 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:52:20,411 INFO L231 Difference]: Finished difference. Result has 46 places, 46 transitions, 109 flow [2024-11-19 09:52:20,412 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=109, PETRI_PLACES=46, PETRI_TRANSITIONS=46} [2024-11-19 09:52:20,413 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, -12 predicate places. [2024-11-19 09:52:20,415 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 46 transitions, 109 flow [2024-11-19 09:52:20,415 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:20,415 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:52:20,415 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:52:20,415 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-19 09:52:20,416 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 09:52:20,417 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:52:20,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1722261210, now seen corresponding path program 1 times [2024-11-19 09:52:20,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:52:20,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567912184] [2024-11-19 09:52:20,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:52:20,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:52:20,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:52:20,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:20,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:52:20,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567912184] [2024-11-19 09:52:20,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567912184] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:52:20,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376056686] [2024-11-19 09:52:20,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:52:20,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:52:20,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:52:20,540 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:52:20,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-19 09:52:20,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:52:20,617 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-19 09:52:20,621 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:52:20,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:20,705 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:52:20,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:20,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376056686] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:52:20,781 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:52:20,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-11-19 09:52:20,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275208779] [2024-11-19 09:52:20,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:52:20,783 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-19 09:52:20,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:52:20,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-19 09:52:20,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2024-11-19 09:52:20,838 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2024-11-19 09:52:20,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 46 transitions, 109 flow. Second operand has 12 states, 12 states have (on average 29.583333333333332) internal successors, (355), 12 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:20,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:52:20,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2024-11-19 09:52:20,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:52:21,186 INFO L124 PetriNetUnfolderBase]: 1237/2179 cut-off events. [2024-11-19 09:52:21,187 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-11-19 09:52:21,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3946 conditions, 2179 events. 1237/2179 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 12606 event pairs, 645 based on Foata normal form. 0/1719 useless extension candidates. Maximal degree in co-relation 3933. Up to 1063 conditions per place. [2024-11-19 09:52:21,204 INFO L140 encePairwiseOnDemand]: 52/59 looper letters, 63 selfloop transitions, 8 changer transitions 0/87 dead transitions. [2024-11-19 09:52:21,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 87 transitions, 346 flow [2024-11-19 09:52:21,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 09:52:21,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 09:52:21,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 268 transitions. [2024-11-19 09:52:21,210 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.648910411622276 [2024-11-19 09:52:21,210 INFO L175 Difference]: Start difference. First operand has 46 places, 46 transitions, 109 flow. Second operand 7 states and 268 transitions. [2024-11-19 09:52:21,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 87 transitions, 346 flow [2024-11-19 09:52:21,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 87 transitions, 344 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 09:52:21,212 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 160 flow [2024-11-19 09:52:21,212 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=160, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2024-11-19 09:52:21,214 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, -3 predicate places. [2024-11-19 09:52:21,214 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 160 flow [2024-11-19 09:52:21,215 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 29.583333333333332) internal successors, (355), 12 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:21,217 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:52:21,217 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:52:21,251 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-19 09:52:21,421 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:52:21,422 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 09:52:21,423 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:52:21,423 INFO L85 PathProgramCache]: Analyzing trace with hash -78437364, now seen corresponding path program 2 times [2024-11-19 09:52:21,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:52:21,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674876274] [2024-11-19 09:52:21,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:52:21,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:52:21,446 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-19 09:52:21,446 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:52:21,670 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 09:52:21,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:52:21,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674876274] [2024-11-19 09:52:21,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674876274] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:52:21,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:52:21,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 09:52:21,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858270409] [2024-11-19 09:52:21,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:52:21,672 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 09:52:21,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:52:21,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 09:52:21,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-19 09:52:21,835 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 59 [2024-11-19 09:52:21,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 160 flow. Second operand has 6 states, 6 states have (on average 27.333333333333332) internal successors, (164), 6 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:21,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:52:21,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 59 [2024-11-19 09:52:21,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:52:22,240 INFO L124 PetriNetUnfolderBase]: 1985/3347 cut-off events. [2024-11-19 09:52:22,241 INFO L125 PetriNetUnfolderBase]: For 329/329 co-relation queries the response was YES. [2024-11-19 09:52:22,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6619 conditions, 3347 events. 1985/3347 cut-off events. For 329/329 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 19746 event pairs, 834 based on Foata normal form. 62/2663 useless extension candidates. Maximal degree in co-relation 4920. Up to 1951 conditions per place. [2024-11-19 09:52:22,261 INFO L140 encePairwiseOnDemand]: 51/59 looper letters, 62 selfloop transitions, 9 changer transitions 0/85 dead transitions. [2024-11-19 09:52:22,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 85 transitions, 378 flow [2024-11-19 09:52:22,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 09:52:22,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 09:52:22,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 223 transitions. [2024-11-19 09:52:22,263 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6299435028248588 [2024-11-19 09:52:22,263 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 160 flow. Second operand 6 states and 223 transitions. [2024-11-19 09:52:22,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 85 transitions, 378 flow [2024-11-19 09:52:22,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 85 transitions, 370 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-11-19 09:52:22,266 INFO L231 Difference]: Finished difference. Result has 61 places, 54 transitions, 197 flow [2024-11-19 09:52:22,267 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=197, PETRI_PLACES=61, PETRI_TRANSITIONS=54} [2024-11-19 09:52:22,267 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 3 predicate places. [2024-11-19 09:52:22,268 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 54 transitions, 197 flow [2024-11-19 09:52:22,268 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.333333333333332) internal successors, (164), 6 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:22,268 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:52:22,268 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:52:22,268 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-19 09:52:22,269 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 09:52:22,269 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:52:22,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1668852911, now seen corresponding path program 1 times [2024-11-19 09:52:22,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:52:22,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019050379] [2024-11-19 09:52:22,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:52:22,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:52:22,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:52:22,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:22,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:52:22,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019050379] [2024-11-19 09:52:22,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019050379] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:52:22,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294187180] [2024-11-19 09:52:22,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:52:22,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:52:22,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:52:22,389 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:52:22,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-19 09:52:22,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:52:22,457 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 09:52:22,458 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:52:22,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:22,528 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:52:22,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:22,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294187180] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:52:22,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:52:22,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-19 09:52:22,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620254553] [2024-11-19 09:52:22,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:52:22,592 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-19 09:52:22,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:52:22,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-19 09:52:22,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-11-19 09:52:22,646 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2024-11-19 09:52:22,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 54 transitions, 197 flow. Second operand has 13 states, 13 states have (on average 29.846153846153847) internal successors, (388), 13 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:22,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:52:22,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2024-11-19 09:52:22,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:52:23,078 INFO L124 PetriNetUnfolderBase]: 1473/2669 cut-off events. [2024-11-19 09:52:23,079 INFO L125 PetriNetUnfolderBase]: For 1572/1578 co-relation queries the response was YES. [2024-11-19 09:52:23,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5921 conditions, 2669 events. 1473/2669 cut-off events. For 1572/1578 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 16445 event pairs, 799 based on Foata normal form. 0/2125 useless extension candidates. Maximal degree in co-relation 4871. Up to 1660 conditions per place. [2024-11-19 09:52:23,098 INFO L140 encePairwiseOnDemand]: 52/59 looper letters, 59 selfloop transitions, 8 changer transitions 0/83 dead transitions. [2024-11-19 09:52:23,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 83 transitions, 413 flow [2024-11-19 09:52:23,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 09:52:23,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 09:52:23,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 261 transitions. [2024-11-19 09:52:23,100 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6319612590799032 [2024-11-19 09:52:23,101 INFO L175 Difference]: Start difference. First operand has 61 places, 54 transitions, 197 flow. Second operand 7 states and 261 transitions. [2024-11-19 09:52:23,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 83 transitions, 413 flow [2024-11-19 09:52:23,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 83 transitions, 396 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-19 09:52:23,107 INFO L231 Difference]: Finished difference. Result has 66 places, 56 transitions, 213 flow [2024-11-19 09:52:23,107 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=213, PETRI_PLACES=66, PETRI_TRANSITIONS=56} [2024-11-19 09:52:23,108 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 8 predicate places. [2024-11-19 09:52:23,108 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 56 transitions, 213 flow [2024-11-19 09:52:23,108 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 29.846153846153847) internal successors, (388), 13 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:23,108 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:52:23,109 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:52:23,125 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-19 09:52:23,309 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-19 09:52:23,310 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 09:52:23,310 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:52:23,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1792865463, now seen corresponding path program 2 times [2024-11-19 09:52:23,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:52:23,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792601514] [2024-11-19 09:52:23,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:52:23,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:52:23,323 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-19 09:52:23,323 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:52:23,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 09:52:23,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:52:23,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792601514] [2024-11-19 09:52:23,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792601514] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:52:23,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:52:23,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 09:52:23,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954293671] [2024-11-19 09:52:23,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:52:23,485 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 09:52:23,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:52:23,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 09:52:23,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-19 09:52:23,623 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 59 [2024-11-19 09:52:23,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 56 transitions, 213 flow. Second operand has 6 states, 6 states have (on average 27.666666666666668) internal successors, (166), 6 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:23,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:52:23,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 59 [2024-11-19 09:52:23,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:52:24,105 INFO L124 PetriNetUnfolderBase]: 2817/4660 cut-off events. [2024-11-19 09:52:24,106 INFO L125 PetriNetUnfolderBase]: For 2235/2307 co-relation queries the response was YES. [2024-11-19 09:52:24,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10593 conditions, 4660 events. 2817/4660 cut-off events. For 2235/2307 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 28269 event pairs, 1151 based on Foata normal form. 101/3877 useless extension candidates. Maximal degree in co-relation 9419. Up to 2709 conditions per place. [2024-11-19 09:52:24,138 INFO L140 encePairwiseOnDemand]: 51/59 looper letters, 73 selfloop transitions, 9 changer transitions 0/96 dead transitions. [2024-11-19 09:52:24,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 96 transitions, 521 flow [2024-11-19 09:52:24,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 09:52:24,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 09:52:24,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 221 transitions. [2024-11-19 09:52:24,140 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6242937853107344 [2024-11-19 09:52:24,141 INFO L175 Difference]: Start difference. First operand has 66 places, 56 transitions, 213 flow. Second operand 6 states and 221 transitions. [2024-11-19 09:52:24,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 96 transitions, 521 flow [2024-11-19 09:52:24,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 96 transitions, 510 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-19 09:52:24,148 INFO L231 Difference]: Finished difference. Result has 69 places, 59 transitions, 247 flow [2024-11-19 09:52:24,148 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=247, PETRI_PLACES=69, PETRI_TRANSITIONS=59} [2024-11-19 09:52:24,149 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 11 predicate places. [2024-11-19 09:52:24,149 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 59 transitions, 247 flow [2024-11-19 09:52:24,149 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.666666666666668) internal successors, (166), 6 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:24,149 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:52:24,149 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:52:24,150 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-19 09:52:24,150 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 09:52:24,150 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:52:24,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1772806024, now seen corresponding path program 1 times [2024-11-19 09:52:24,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:52:24,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266209520] [2024-11-19 09:52:24,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:52:24,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:52:24,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:52:24,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:24,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:52:24,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266209520] [2024-11-19 09:52:24,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266209520] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:52:24,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070560185] [2024-11-19 09:52:24,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:52:24,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:52:24,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:52:24,263 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:52:24,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-19 09:52:24,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:52:24,349 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 09:52:24,350 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:52:24,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:24,452 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:52:24,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:24,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070560185] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:52:24,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:52:24,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-11-19 09:52:24,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670257136] [2024-11-19 09:52:24,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:52:24,517 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-19 09:52:24,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:52:24,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-19 09:52:24,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-11-19 09:52:24,559 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2024-11-19 09:52:24,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 59 transitions, 247 flow. Second operand has 12 states, 12 states have (on average 30.166666666666668) internal successors, (362), 12 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:24,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:52:24,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2024-11-19 09:52:24,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:52:25,076 INFO L124 PetriNetUnfolderBase]: 2175/3908 cut-off events. [2024-11-19 09:52:25,077 INFO L125 PetriNetUnfolderBase]: For 3490/3602 co-relation queries the response was YES. [2024-11-19 09:52:25,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9784 conditions, 3908 events. 2175/3908 cut-off events. For 3490/3602 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 25455 event pairs, 1205 based on Foata normal form. 0/3232 useless extension candidates. Maximal degree in co-relation 8946. Up to 2675 conditions per place. [2024-11-19 09:52:25,100 INFO L140 encePairwiseOnDemand]: 52/59 looper letters, 55 selfloop transitions, 8 changer transitions 0/79 dead transitions. [2024-11-19 09:52:25,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 79 transitions, 449 flow [2024-11-19 09:52:25,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 09:52:25,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 09:52:25,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 254 transitions. [2024-11-19 09:52:25,102 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6150121065375302 [2024-11-19 09:52:25,102 INFO L175 Difference]: Start difference. First operand has 69 places, 59 transitions, 247 flow. Second operand 7 states and 254 transitions. [2024-11-19 09:52:25,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 79 transitions, 449 flow [2024-11-19 09:52:25,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 79 transitions, 432 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-19 09:52:25,108 INFO L231 Difference]: Finished difference. Result has 74 places, 61 transitions, 263 flow [2024-11-19 09:52:25,108 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=263, PETRI_PLACES=74, PETRI_TRANSITIONS=61} [2024-11-19 09:52:25,109 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 16 predicate places. [2024-11-19 09:52:25,109 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 61 transitions, 263 flow [2024-11-19 09:52:25,109 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 30.166666666666668) internal successors, (362), 12 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:25,109 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:52:25,109 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:52:25,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-19 09:52:25,310 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:52:25,310 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 09:52:25,311 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:52:25,311 INFO L85 PathProgramCache]: Analyzing trace with hash -263890747, now seen corresponding path program 1 times [2024-11-19 09:52:25,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:52:25,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525991801] [2024-11-19 09:52:25,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:52:25,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:52:25,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:52:25,419 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:25,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:52:25,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525991801] [2024-11-19 09:52:25,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525991801] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:52:25,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306566659] [2024-11-19 09:52:25,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:52:25,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:52:25,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:52:25,422 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:52:25,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-19 09:52:25,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:52:25,492 INFO L255 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-19 09:52:25,493 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:52:25,589 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:25,590 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:52:25,674 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:25,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306566659] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:52:25,675 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:52:25,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-11-19 09:52:25,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992324573] [2024-11-19 09:52:25,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:52:25,676 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-19 09:52:25,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:52:25,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-19 09:52:25,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2024-11-19 09:52:25,759 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2024-11-19 09:52:25,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 61 transitions, 263 flow. Second operand has 17 states, 17 states have (on average 29.764705882352942) internal successors, (506), 17 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:25,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:52:25,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2024-11-19 09:52:25,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:52:26,596 INFO L124 PetriNetUnfolderBase]: 3676/6476 cut-off events. [2024-11-19 09:52:26,596 INFO L125 PetriNetUnfolderBase]: For 4780/4934 co-relation queries the response was YES. [2024-11-19 09:52:26,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16289 conditions, 6476 events. 3676/6476 cut-off events. For 4780/4934 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 44880 event pairs, 1489 based on Foata normal form. 0/5451 useless extension candidates. Maximal degree in co-relation 8903. Up to 2675 conditions per place. [2024-11-19 09:52:26,639 INFO L140 encePairwiseOnDemand]: 51/59 looper letters, 104 selfloop transitions, 14 changer transitions 0/134 dead transitions. [2024-11-19 09:52:26,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 134 transitions, 794 flow [2024-11-19 09:52:26,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 09:52:26,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-19 09:52:26,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 346 transitions. [2024-11-19 09:52:26,641 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6516007532956686 [2024-11-19 09:52:26,641 INFO L175 Difference]: Start difference. First operand has 74 places, 61 transitions, 263 flow. Second operand 9 states and 346 transitions. [2024-11-19 09:52:26,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 134 transitions, 794 flow [2024-11-19 09:52:26,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 134 transitions, 779 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-19 09:52:26,658 INFO L231 Difference]: Finished difference. Result has 83 places, 68 transitions, 352 flow [2024-11-19 09:52:26,658 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=352, PETRI_PLACES=83, PETRI_TRANSITIONS=68} [2024-11-19 09:52:26,659 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 25 predicate places. [2024-11-19 09:52:26,659 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 68 transitions, 352 flow [2024-11-19 09:52:26,659 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 29.764705882352942) internal successors, (506), 17 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:26,659 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:52:26,660 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:52:26,677 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-19 09:52:26,863 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:52:26,864 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 09:52:26,864 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:52:26,864 INFO L85 PathProgramCache]: Analyzing trace with hash -115490962, now seen corresponding path program 2 times [2024-11-19 09:52:26,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:52:26,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443746412] [2024-11-19 09:52:26,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:52:26,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:52:26,882 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-19 09:52:26,886 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:52:27,085 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 09:52:27,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:52:27,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443746412] [2024-11-19 09:52:27,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443746412] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:52:27,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:52:27,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 09:52:27,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278082483] [2024-11-19 09:52:27,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:52:27,090 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 09:52:27,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:52:27,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 09:52:27,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-19 09:52:27,211 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 59 [2024-11-19 09:52:27,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 68 transitions, 352 flow. Second operand has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:27,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:52:27,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 59 [2024-11-19 09:52:27,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:52:27,814 INFO L124 PetriNetUnfolderBase]: 4344/6970 cut-off events. [2024-11-19 09:52:27,815 INFO L125 PetriNetUnfolderBase]: For 10040/10190 co-relation queries the response was YES. [2024-11-19 09:52:27,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19781 conditions, 6970 events. 4344/6970 cut-off events. For 10040/10190 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 43714 event pairs, 972 based on Foata normal form. 0/5989 useless extension candidates. Maximal degree in co-relation 14643. Up to 2281 conditions per place. [2024-11-19 09:52:27,850 INFO L140 encePairwiseOnDemand]: 51/59 looper letters, 93 selfloop transitions, 10 changer transitions 0/116 dead transitions. [2024-11-19 09:52:27,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 116 transitions, 854 flow [2024-11-19 09:52:27,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 09:52:27,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 09:52:27,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 208 transitions. [2024-11-19 09:52:27,852 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5875706214689266 [2024-11-19 09:52:27,852 INFO L175 Difference]: Start difference. First operand has 83 places, 68 transitions, 352 flow. Second operand 6 states and 208 transitions. [2024-11-19 09:52:27,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 116 transitions, 854 flow [2024-11-19 09:52:27,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 116 transitions, 833 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-11-19 09:52:27,868 INFO L231 Difference]: Finished difference. Result has 84 places, 66 transitions, 355 flow [2024-11-19 09:52:27,868 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=335, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=355, PETRI_PLACES=84, PETRI_TRANSITIONS=66} [2024-11-19 09:52:27,869 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 26 predicate places. [2024-11-19 09:52:27,869 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 66 transitions, 355 flow [2024-11-19 09:52:27,869 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:27,869 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:52:27,870 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:52:27,870 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-19 09:52:27,870 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 09:52:27,870 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:52:27,870 INFO L85 PathProgramCache]: Analyzing trace with hash -956861754, now seen corresponding path program 1 times [2024-11-19 09:52:27,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:52:27,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848262287] [2024-11-19 09:52:27,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:52:27,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:52:27,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:52:27,984 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:27,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:52:27,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848262287] [2024-11-19 09:52:27,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848262287] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:52:27,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601761365] [2024-11-19 09:52:27,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:52:27,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:52:27,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:52:27,987 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:52:27,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-19 09:52:28,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:52:28,055 INFO L255 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-19 09:52:28,056 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:52:28,171 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:28,172 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:52:28,261 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:28,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601761365] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:52:28,261 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:52:28,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-11-19 09:52:28,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473103885] [2024-11-19 09:52:28,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:52:28,262 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-19 09:52:28,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:52:28,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-19 09:52:28,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2024-11-19 09:52:28,344 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2024-11-19 09:52:28,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 66 transitions, 355 flow. Second operand has 18 states, 18 states have (on average 29.944444444444443) internal successors, (539), 18 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:28,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:52:28,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2024-11-19 09:52:28,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:52:28,978 INFO L124 PetriNetUnfolderBase]: 3251/5495 cut-off events. [2024-11-19 09:52:28,979 INFO L125 PetriNetUnfolderBase]: For 7847/7959 co-relation queries the response was YES. [2024-11-19 09:52:28,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16171 conditions, 5495 events. 3251/5495 cut-off events. For 7847/7959 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 34788 event pairs, 1409 based on Foata normal form. 0/4752 useless extension candidates. Maximal degree in co-relation 12087. Up to 2672 conditions per place. [2024-11-19 09:52:29,019 INFO L140 encePairwiseOnDemand]: 51/59 looper letters, 96 selfloop transitions, 14 changer transitions 0/124 dead transitions. [2024-11-19 09:52:29,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 124 transitions, 865 flow [2024-11-19 09:52:29,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 09:52:29,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-19 09:52:29,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 344 transitions. [2024-11-19 09:52:29,022 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.647834274952919 [2024-11-19 09:52:29,022 INFO L175 Difference]: Start difference. First operand has 84 places, 66 transitions, 355 flow. Second operand 9 states and 344 transitions. [2024-11-19 09:52:29,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 124 transitions, 865 flow [2024-11-19 09:52:29,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 124 transitions, 817 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-19 09:52:29,044 INFO L231 Difference]: Finished difference. Result has 90 places, 70 transitions, 407 flow [2024-11-19 09:52:29,045 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=335, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=407, PETRI_PLACES=90, PETRI_TRANSITIONS=70} [2024-11-19 09:52:29,046 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 32 predicate places. [2024-11-19 09:52:29,046 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 70 transitions, 407 flow [2024-11-19 09:52:29,048 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 29.944444444444443) internal successors, (539), 18 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:29,048 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:52:29,048 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:52:29,066 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-19 09:52:29,252 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-19 09:52:29,253 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 09:52:29,253 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:52:29,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1328444831, now seen corresponding path program 2 times [2024-11-19 09:52:29,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:52:29,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175928557] [2024-11-19 09:52:29,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:52:29,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:52:29,278 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:52:29,283 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:52:29,527 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 09:52:29,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:52:29,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175928557] [2024-11-19 09:52:29,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175928557] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:52:29,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376369510] [2024-11-19 09:52:29,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:52:29,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:52:29,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:52:29,530 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:52:29,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-19 09:52:29,607 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:52:29,607 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:52:29,609 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-19 09:52:29,613 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:52:29,646 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-19 09:52:30,036 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 09:52:30,037 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:52:30,306 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 09:52:30,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376369510] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:52:30,307 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:52:30,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2024-11-19 09:52:30,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786110453] [2024-11-19 09:52:30,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:52:30,307 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-19 09:52:30,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:52:30,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-19 09:52:30,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2024-11-19 09:52:30,841 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 59 [2024-11-19 09:52:30,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 70 transitions, 407 flow. Second operand has 17 states, 17 states have (on average 24.764705882352942) internal successors, (421), 17 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:30,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:52:30,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 59 [2024-11-19 09:52:30,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:52:32,506 INFO L124 PetriNetUnfolderBase]: 7599/11151 cut-off events. [2024-11-19 09:52:32,506 INFO L125 PetriNetUnfolderBase]: For 17459/17542 co-relation queries the response was YES. [2024-11-19 09:52:32,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34158 conditions, 11151 events. 7599/11151 cut-off events. For 17459/17542 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 64189 event pairs, 877 based on Foata normal form. 284/10151 useless extension candidates. Maximal degree in co-relation 23691. Up to 3087 conditions per place. [2024-11-19 09:52:32,573 INFO L140 encePairwiseOnDemand]: 47/59 looper letters, 189 selfloop transitions, 25 changer transitions 0/223 dead transitions. [2024-11-19 09:52:32,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 223 transitions, 1576 flow [2024-11-19 09:52:32,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-19 09:52:32,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-19 09:52:32,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 379 transitions. [2024-11-19 09:52:32,575 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6423728813559322 [2024-11-19 09:52:32,575 INFO L175 Difference]: Start difference. First operand has 90 places, 70 transitions, 407 flow. Second operand 10 states and 379 transitions. [2024-11-19 09:52:32,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 223 transitions, 1576 flow [2024-11-19 09:52:32,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 223 transitions, 1538 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-11-19 09:52:32,654 INFO L231 Difference]: Finished difference. Result has 93 places, 77 transitions, 498 flow [2024-11-19 09:52:32,654 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=381, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=498, PETRI_PLACES=93, PETRI_TRANSITIONS=77} [2024-11-19 09:52:32,655 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 35 predicate places. [2024-11-19 09:52:32,655 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 77 transitions, 498 flow [2024-11-19 09:52:32,656 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 24.764705882352942) internal successors, (421), 17 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:32,656 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:52:32,656 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:52:32,673 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-19 09:52:32,860 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:52:32,861 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 09:52:32,861 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:52:32,861 INFO L85 PathProgramCache]: Analyzing trace with hash 269271328, now seen corresponding path program 2 times [2024-11-19 09:52:32,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:52:32,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171223905] [2024-11-19 09:52:32,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:52:32,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:52:32,893 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:52:32,893 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:52:33,000 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 09:52:33,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:52:33,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171223905] [2024-11-19 09:52:33,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171223905] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:52:33,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:52:33,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 09:52:33,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741392951] [2024-11-19 09:52:33,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:52:33,001 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:52:33,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:52:33,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:52:33,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:52:33,004 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 59 [2024-11-19 09:52:33,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 77 transitions, 498 flow. Second operand has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:33,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:52:33,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 59 [2024-11-19 09:52:33,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:52:34,688 INFO L124 PetriNetUnfolderBase]: 10869/15947 cut-off events. [2024-11-19 09:52:34,689 INFO L125 PetriNetUnfolderBase]: For 37323/37505 co-relation queries the response was YES. [2024-11-19 09:52:34,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55410 conditions, 15947 events. 10869/15947 cut-off events. For 37323/37505 co-relation queries the response was YES. Maximal size of possible extension queue 589. Compared 95683 event pairs, 4329 based on Foata normal form. 8/13683 useless extension candidates. Maximal degree in co-relation 38732. Up to 9069 conditions per place. [2024-11-19 09:52:34,794 INFO L140 encePairwiseOnDemand]: 53/59 looper letters, 142 selfloop transitions, 10 changer transitions 0/164 dead transitions. [2024-11-19 09:52:34,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 164 transitions, 1360 flow [2024-11-19 09:52:34,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:52:34,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:52:34,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 212 transitions. [2024-11-19 09:52:34,796 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7186440677966102 [2024-11-19 09:52:34,796 INFO L175 Difference]: Start difference. First operand has 93 places, 77 transitions, 498 flow. Second operand 5 states and 212 transitions. [2024-11-19 09:52:34,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 164 transitions, 1360 flow [2024-11-19 09:52:34,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 164 transitions, 1170 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-11-19 09:52:34,976 INFO L231 Difference]: Finished difference. Result has 95 places, 83 transitions, 520 flow [2024-11-19 09:52:34,977 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=438, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=520, PETRI_PLACES=95, PETRI_TRANSITIONS=83} [2024-11-19 09:52:34,978 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 37 predicate places. [2024-11-19 09:52:34,978 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 83 transitions, 520 flow [2024-11-19 09:52:34,978 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:34,978 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:52:34,978 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:52:34,978 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-19 09:52:34,979 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 09:52:34,979 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:52:34,979 INFO L85 PathProgramCache]: Analyzing trace with hash 107710917, now seen corresponding path program 1 times [2024-11-19 09:52:34,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:52:34,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014270104] [2024-11-19 09:52:34,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:52:34,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:52:34,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:52:35,235 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:35,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:52:35,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014270104] [2024-11-19 09:52:35,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014270104] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:52:35,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254605427] [2024-11-19 09:52:35,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:52:35,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:52:35,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:52:35,238 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:52:35,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-19 09:52:35,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:52:35,327 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 09:52:35,328 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:52:35,458 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 09:52:35,458 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 09:52:35,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254605427] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:52:35,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-19 09:52:35,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 14 [2024-11-19 09:52:35,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304043955] [2024-11-19 09:52:35,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:52:35,459 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-19 09:52:35,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:52:35,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-19 09:52:35,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2024-11-19 09:52:35,552 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 59 [2024-11-19 09:52:35,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 83 transitions, 520 flow. Second operand has 7 states, 7 states have (on average 27.857142857142858) internal successors, (195), 7 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:35,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:52:35,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 59 [2024-11-19 09:52:35,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:52:36,902 INFO L124 PetriNetUnfolderBase]: 8765/13526 cut-off events. [2024-11-19 09:52:36,902 INFO L125 PetriNetUnfolderBase]: For 23403/23565 co-relation queries the response was YES. [2024-11-19 09:52:36,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45507 conditions, 13526 events. 8765/13526 cut-off events. For 23403/23565 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 86559 event pairs, 1508 based on Foata normal form. 202/12599 useless extension candidates. Maximal degree in co-relation 31165. Up to 4307 conditions per place. [2024-11-19 09:52:36,993 INFO L140 encePairwiseOnDemand]: 52/59 looper letters, 158 selfloop transitions, 22 changer transitions 0/193 dead transitions. [2024-11-19 09:52:36,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 193 transitions, 1453 flow [2024-11-19 09:52:36,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-19 09:52:36,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-19 09:52:36,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 301 transitions. [2024-11-19 09:52:36,995 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6377118644067796 [2024-11-19 09:52:36,995 INFO L175 Difference]: Start difference. First operand has 95 places, 83 transitions, 520 flow. Second operand 8 states and 301 transitions. [2024-11-19 09:52:36,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 193 transitions, 1453 flow [2024-11-19 09:52:37,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 193 transitions, 1451 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-11-19 09:52:37,207 INFO L231 Difference]: Finished difference. Result has 101 places, 86 transitions, 579 flow [2024-11-19 09:52:37,207 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=514, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=579, PETRI_PLACES=101, PETRI_TRANSITIONS=86} [2024-11-19 09:52:37,207 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 43 predicate places. [2024-11-19 09:52:37,207 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 86 transitions, 579 flow [2024-11-19 09:52:37,208 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 27.857142857142858) internal successors, (195), 7 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:37,208 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:52:37,208 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:52:37,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-19 09:52:37,408 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:52:37,408 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 09:52:37,409 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:52:37,409 INFO L85 PathProgramCache]: Analyzing trace with hash -955928449, now seen corresponding path program 1 times [2024-11-19 09:52:37,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:52:37,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123521464] [2024-11-19 09:52:37,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:52:37,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:52:37,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:52:37,672 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-19 09:52:37,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:52:37,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123521464] [2024-11-19 09:52:37,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123521464] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:52:37,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812903212] [2024-11-19 09:52:37,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:52:37,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:52:37,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:52:37,675 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:52:37,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-19 09:52:37,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:52:37,756 INFO L255 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-19 09:52:37,757 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:52:37,886 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:37,887 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:52:38,045 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 7 treesize of output 5 [2024-11-19 09:52:38,078 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:38,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812903212] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:52:38,080 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:52:38,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 8] total 18 [2024-11-19 09:52:38,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867192705] [2024-11-19 09:52:38,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:52:38,080 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-19 09:52:38,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:52:38,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-19 09:52:38,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2024-11-19 09:52:38,613 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 59 [2024-11-19 09:52:38,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 86 transitions, 579 flow. Second operand has 20 states, 20 states have (on average 25.4) internal successors, (508), 20 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:38,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:52:38,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 59 [2024-11-19 09:52:38,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:52:40,975 INFO L124 PetriNetUnfolderBase]: 14326/21312 cut-off events. [2024-11-19 09:52:40,976 INFO L125 PetriNetUnfolderBase]: For 40170/40170 co-relation queries the response was YES. [2024-11-19 09:52:41,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73381 conditions, 21312 events. 14326/21312 cut-off events. For 40170/40170 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 131650 event pairs, 3090 based on Foata normal form. 388/20203 useless extension candidates. Maximal degree in co-relation 56264. Up to 4514 conditions per place. [2024-11-19 09:52:41,165 INFO L140 encePairwiseOnDemand]: 50/59 looper letters, 232 selfloop transitions, 28 changer transitions 0/268 dead transitions. [2024-11-19 09:52:41,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 268 transitions, 1935 flow [2024-11-19 09:52:41,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-19 09:52:41,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-19 09:52:41,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 500 transitions. [2024-11-19 09:52:41,168 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6053268765133172 [2024-11-19 09:52:41,168 INFO L175 Difference]: Start difference. First operand has 101 places, 86 transitions, 579 flow. Second operand 14 states and 500 transitions. [2024-11-19 09:52:41,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 268 transitions, 1935 flow [2024-11-19 09:52:41,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 268 transitions, 1888 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-11-19 09:52:41,449 INFO L231 Difference]: Finished difference. Result has 113 places, 97 transitions, 721 flow [2024-11-19 09:52:41,449 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=538, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=721, PETRI_PLACES=113, PETRI_TRANSITIONS=97} [2024-11-19 09:52:41,449 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 55 predicate places. [2024-11-19 09:52:41,450 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 97 transitions, 721 flow [2024-11-19 09:52:41,450 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 25.4) internal successors, (508), 20 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:41,450 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:52:41,450 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] [2024-11-19 09:52:41,462 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-19 09:52:41,650 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-19 09:52:41,651 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 09:52:41,651 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:52:41,651 INFO L85 PathProgramCache]: Analyzing trace with hash 386144350, now seen corresponding path program 1 times [2024-11-19 09:52:41,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:52:41,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259238523] [2024-11-19 09:52:41,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:52:41,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:52:41,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:52:41,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:52:41,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:52:41,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259238523] [2024-11-19 09:52:41,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259238523] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:52:41,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:52:41,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:52:41,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617449836] [2024-11-19 09:52:41,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:52:41,971 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:52:41,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:52:41,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:52:41,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:52:41,972 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2024-11-19 09:52:41,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 97 transitions, 721 flow. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:41,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:52:41,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2024-11-19 09:52:41,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:52:43,616 INFO L124 PetriNetUnfolderBase]: 12938/19584 cut-off events. [2024-11-19 09:52:43,616 INFO L125 PetriNetUnfolderBase]: For 56424/56833 co-relation queries the response was YES. [2024-11-19 09:52:43,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71446 conditions, 19584 events. 12938/19584 cut-off events. For 56424/56833 co-relation queries the response was YES. Maximal size of possible extension queue 754. Compared 125597 event pairs, 2446 based on Foata normal form. 37/17815 useless extension candidates. Maximal degree in co-relation 52907. Up to 14292 conditions per place. [2024-11-19 09:52:43,749 INFO L140 encePairwiseOnDemand]: 54/59 looper letters, 100 selfloop transitions, 9 changer transitions 8/134 dead transitions. [2024-11-19 09:52:43,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 134 transitions, 1208 flow [2024-11-19 09:52:43,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:52:43,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:52:43,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 137 transitions. [2024-11-19 09:52:43,751 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7740112994350282 [2024-11-19 09:52:43,751 INFO L175 Difference]: Start difference. First operand has 113 places, 97 transitions, 721 flow. Second operand 3 states and 137 transitions. [2024-11-19 09:52:43,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 134 transitions, 1208 flow [2024-11-19 09:52:43,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 134 transitions, 1149 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-11-19 09:52:43,907 INFO L231 Difference]: Finished difference. Result has 107 places, 97 transitions, 698 flow [2024-11-19 09:52:43,907 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=676, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=698, PETRI_PLACES=107, PETRI_TRANSITIONS=97} [2024-11-19 09:52:43,908 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 49 predicate places. [2024-11-19 09:52:43,908 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 97 transitions, 698 flow [2024-11-19 09:52:43,908 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:43,908 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:52:43,908 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:52:43,908 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-19 09:52:43,909 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 09:52:43,909 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:52:43,909 INFO L85 PathProgramCache]: Analyzing trace with hash 849522651, now seen corresponding path program 1 times [2024-11-19 09:52:43,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:52:43,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989800432] [2024-11-19 09:52:43,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:52:43,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:52:43,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:52:44,020 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:44,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:52:44,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989800432] [2024-11-19 09:52:44,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989800432] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:52:44,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642844737] [2024-11-19 09:52:44,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:52:44,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:52:44,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:52:44,023 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:52:44,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-19 09:52:44,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:52:44,099 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-19 09:52:44,100 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:52:44,176 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:44,177 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:52:44,261 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:44,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642844737] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 09:52:44,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-19 09:52:44,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 16 [2024-11-19 09:52:44,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858966235] [2024-11-19 09:52:44,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:52:44,262 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-19 09:52:44,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:52:44,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-19 09:52:44,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2024-11-19 09:52:44,304 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2024-11-19 09:52:44,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 97 transitions, 698 flow. Second operand has 8 states, 8 states have (on average 31.0) internal successors, (248), 8 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:44,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:52:44,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2024-11-19 09:52:44,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:52:46,188 INFO L124 PetriNetUnfolderBase]: 11250/18406 cut-off events. [2024-11-19 09:52:46,188 INFO L125 PetriNetUnfolderBase]: For 50519/50535 co-relation queries the response was YES. [2024-11-19 09:52:46,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65463 conditions, 18406 events. 11250/18406 cut-off events. For 50519/50535 co-relation queries the response was YES. Maximal size of possible extension queue 835. Compared 134932 event pairs, 2860 based on Foata normal form. 0/16439 useless extension candidates. Maximal degree in co-relation 47526. Up to 6468 conditions per place. [2024-11-19 09:52:46,293 INFO L140 encePairwiseOnDemand]: 49/59 looper letters, 207 selfloop transitions, 37 changer transitions 0/261 dead transitions. [2024-11-19 09:52:46,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 261 transitions, 2306 flow [2024-11-19 09:52:46,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-19 09:52:46,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-19 09:52:46,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 381 transitions. [2024-11-19 09:52:46,296 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6457627118644068 [2024-11-19 09:52:46,296 INFO L175 Difference]: Start difference. First operand has 107 places, 97 transitions, 698 flow. Second operand 10 states and 381 transitions. [2024-11-19 09:52:46,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 261 transitions, 2306 flow [2024-11-19 09:52:46,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 261 transitions, 2157 flow, removed 62 selfloop flow, removed 7 redundant places. [2024-11-19 09:52:46,558 INFO L231 Difference]: Finished difference. Result has 106 places, 118 transitions, 911 flow [2024-11-19 09:52:46,559 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=659, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=911, PETRI_PLACES=106, PETRI_TRANSITIONS=118} [2024-11-19 09:52:46,559 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 48 predicate places. [2024-11-19 09:52:46,559 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 118 transitions, 911 flow [2024-11-19 09:52:46,559 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 31.0) internal successors, (248), 8 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:46,559 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:52:46,559 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:52:46,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-19 09:52:46,760 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,SelfDestructingSolverStorable17 [2024-11-19 09:52:46,760 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 09:52:46,760 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:52:46,760 INFO L85 PathProgramCache]: Analyzing trace with hash 362083221, now seen corresponding path program 2 times [2024-11-19 09:52:46,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:52:46,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040717500] [2024-11-19 09:52:46,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:52:46,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:52:46,772 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:52:46,772 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:52:46,854 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 09:52:46,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:52:46,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040717500] [2024-11-19 09:52:46,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040717500] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:52:46,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923971553] [2024-11-19 09:52:46,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:52:46,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:52:46,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:52:46,857 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:52:46,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-19 09:52:46,942 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:52:46,943 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:52:46,944 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-19 09:52:46,949 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:52:47,026 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:47,026 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:52:47,112 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:47,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923971553] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:52:47,112 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:52:47,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2024-11-19 09:52:47,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763313746] [2024-11-19 09:52:47,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:52:47,113 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-19 09:52:47,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:52:47,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-19 09:52:47,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2024-11-19 09:52:47,199 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2024-11-19 09:52:47,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 118 transitions, 911 flow. Second operand has 16 states, 16 states have (on average 31.0) internal successors, (496), 16 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:47,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:52:47,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2024-11-19 09:52:47,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:52:49,718 INFO L124 PetriNetUnfolderBase]: 15105/24415 cut-off events. [2024-11-19 09:52:49,719 INFO L125 PetriNetUnfolderBase]: For 76965/77126 co-relation queries the response was YES. [2024-11-19 09:52:49,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84258 conditions, 24415 events. 15105/24415 cut-off events. For 76965/77126 co-relation queries the response was YES. Maximal size of possible extension queue 822. Compared 179768 event pairs, 1414 based on Foata normal form. 1278/24019 useless extension candidates. Maximal degree in co-relation 84214. Up to 5188 conditions per place. [2024-11-19 09:52:49,905 INFO L140 encePairwiseOnDemand]: 44/59 looper letters, 287 selfloop transitions, 268 changer transitions 0/572 dead transitions. [2024-11-19 09:52:49,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 572 transitions, 5510 flow [2024-11-19 09:52:49,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-19 09:52:49,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-11-19 09:52:49,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 864 transitions. [2024-11-19 09:52:49,909 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.636698599852616 [2024-11-19 09:52:49,910 INFO L175 Difference]: Start difference. First operand has 106 places, 118 transitions, 911 flow. Second operand 23 states and 864 transitions. [2024-11-19 09:52:49,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 572 transitions, 5510 flow [2024-11-19 09:52:50,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 572 transitions, 5447 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-11-19 09:52:50,175 INFO L231 Difference]: Finished difference. Result has 136 places, 339 transitions, 4045 flow [2024-11-19 09:52:50,176 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=862, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=4045, PETRI_PLACES=136, PETRI_TRANSITIONS=339} [2024-11-19 09:52:50,176 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 78 predicate places. [2024-11-19 09:52:50,177 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 339 transitions, 4045 flow [2024-11-19 09:52:50,177 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 31.0) internal successors, (496), 16 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:50,177 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:52:50,177 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:52:50,195 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-19 09:52:50,378 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:52:50,378 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 09:52:50,379 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:52:50,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1781056745, now seen corresponding path program 3 times [2024-11-19 09:52:50,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:52:50,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522636063] [2024-11-19 09:52:50,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 09:52:50,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:52:50,401 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-19 09:52:50,401 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:52:50,479 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 09:52:50,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:52:50,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522636063] [2024-11-19 09:52:50,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522636063] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:52:50,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827997102] [2024-11-19 09:52:50,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 09:52:50,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:52:50,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:52:50,483 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:52:50,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-19 09:52:50,576 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-19 09:52:50,577 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:52:50,578 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-19 09:52:50,579 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:52:50,649 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 09:52:50,650 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:52:50,694 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 09:52:50,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827997102] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:52:50,695 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:52:50,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2024-11-19 09:52:50,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928497024] [2024-11-19 09:52:50,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:52:50,695 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-19 09:52:50,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:52:50,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-19 09:52:50,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-11-19 09:52:50,800 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2024-11-19 09:52:50,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 339 transitions, 4045 flow. Second operand has 13 states, 13 states have (on average 30.76923076923077) internal successors, (400), 13 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:50,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:52:50,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2024-11-19 09:52:50,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:52:56,698 INFO L124 PetriNetUnfolderBase]: 26920/42746 cut-off events. [2024-11-19 09:52:56,698 INFO L125 PetriNetUnfolderBase]: For 255889/256729 co-relation queries the response was YES. [2024-11-19 09:52:56,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176314 conditions, 42746 events. 26920/42746 cut-off events. For 255889/256729 co-relation queries the response was YES. Maximal size of possible extension queue 1605. Compared 334619 event pairs, 1248 based on Foata normal form. 220/39682 useless extension candidates. Maximal degree in co-relation 176257. Up to 9836 conditions per place. [2024-11-19 09:52:57,088 INFO L140 encePairwiseOnDemand]: 46/59 looper letters, 677 selfloop transitions, 1054 changer transitions 0/1748 dead transitions. [2024-11-19 09:52:57,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 1748 transitions, 23671 flow [2024-11-19 09:52:57,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-19 09:52:57,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2024-11-19 09:52:57,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 1596 transitions. [2024-11-19 09:52:57,091 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6440677966101694 [2024-11-19 09:52:57,091 INFO L175 Difference]: Start difference. First operand has 136 places, 339 transitions, 4045 flow. Second operand 42 states and 1596 transitions. [2024-11-19 09:52:57,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 1748 transitions, 23671 flow [2024-11-19 09:52:59,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 1748 transitions, 23359 flow, removed 152 selfloop flow, removed 4 redundant places. [2024-11-19 09:52:59,176 INFO L231 Difference]: Finished difference. Result has 196 places, 1335 transitions, 20811 flow [2024-11-19 09:52:59,176 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=3985, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=20811, PETRI_PLACES=196, PETRI_TRANSITIONS=1335} [2024-11-19 09:52:59,177 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 138 predicate places. [2024-11-19 09:52:59,177 INFO L471 AbstractCegarLoop]: Abstraction has has 196 places, 1335 transitions, 20811 flow [2024-11-19 09:52:59,177 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 30.76923076923077) internal successors, (400), 13 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:59,177 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:52:59,177 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:52:59,192 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-19 09:52:59,381 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:52:59,381 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 09:52:59,382 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:52:59,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1193077253, now seen corresponding path program 4 times [2024-11-19 09:52:59,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:52:59,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261937738] [2024-11-19 09:52:59,382 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 09:52:59,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:52:59,394 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 09:52:59,394 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:52:59,471 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:59,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:52:59,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261937738] [2024-11-19 09:52:59,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261937738] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:52:59,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637543322] [2024-11-19 09:52:59,472 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 09:52:59,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:52:59,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:52:59,474 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:52:59,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-19 09:52:59,557 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 09:52:59,558 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:52:59,559 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-19 09:52:59,560 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:52:59,661 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:59,662 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:52:59,740 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:59,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637543322] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 09:52:59,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-19 09:52:59,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 15 [2024-11-19 09:52:59,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680829324] [2024-11-19 09:52:59,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:52:59,741 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-19 09:52:59,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:52:59,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-19 09:52:59,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2024-11-19 09:52:59,791 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2024-11-19 09:52:59,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 1335 transitions, 20811 flow. Second operand has 8 states, 8 states have (on average 31.0) internal successors, (248), 8 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:59,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:52:59,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2024-11-19 09:52:59,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:53:08,534 INFO L124 PetriNetUnfolderBase]: 27745/43385 cut-off events. [2024-11-19 09:53:08,534 INFO L125 PetriNetUnfolderBase]: For 367223/368265 co-relation queries the response was YES. [2024-11-19 09:53:08,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210523 conditions, 43385 events. 27745/43385 cut-off events. For 367223/368265 co-relation queries the response was YES. Maximal size of possible extension queue 1635. Compared 334568 event pairs, 3696 based on Foata normal form. 264/41381 useless extension candidates. Maximal degree in co-relation 210446. Up to 10615 conditions per place. [2024-11-19 09:53:09,043 INFO L140 encePairwiseOnDemand]: 47/59 looper letters, 620 selfloop transitions, 910 changer transitions 0/1547 dead transitions. [2024-11-19 09:53:09,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 1547 transitions, 26117 flow [2024-11-19 09:53:09,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-19 09:53:09,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-19 09:53:09,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 388 transitions. [2024-11-19 09:53:09,045 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6576271186440678 [2024-11-19 09:53:09,045 INFO L175 Difference]: Start difference. First operand has 196 places, 1335 transitions, 20811 flow. Second operand 10 states and 388 transitions. [2024-11-19 09:53:09,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 1547 transitions, 26117 flow [2024-11-19 09:53:13,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 1547 transitions, 25225 flow, removed 333 selfloop flow, removed 2 redundant places. [2024-11-19 09:53:13,421 INFO L231 Difference]: Finished difference. Result has 207 places, 1392 transitions, 23835 flow [2024-11-19 09:53:13,422 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=20043, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=853, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=23835, PETRI_PLACES=207, PETRI_TRANSITIONS=1392} [2024-11-19 09:53:13,422 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 149 predicate places. [2024-11-19 09:53:13,422 INFO L471 AbstractCegarLoop]: Abstraction has has 207 places, 1392 transitions, 23835 flow [2024-11-19 09:53:13,422 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 31.0) internal successors, (248), 8 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:53:13,422 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:53:13,423 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:53:13,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-19 09:53:13,623 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-19 09:53:13,623 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 09:53:13,624 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:53:13,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1876051587, now seen corresponding path program 5 times [2024-11-19 09:53:13,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:53:13,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53143283] [2024-11-19 09:53:13,624 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 09:53:13,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:53:13,637 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-19 09:53:13,637 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:53:13,701 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 09:53:13,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:53:13,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53143283] [2024-11-19 09:53:13,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53143283] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:53:13,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766004179] [2024-11-19 09:53:13,702 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 09:53:13,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:53:13,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:53:13,704 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:53:13,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-19 09:53:13,789 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-19 09:53:13,789 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:53:13,791 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-19 09:53:13,792 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:53:13,865 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 09:53:13,865 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:53:13,917 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 09:53:13,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766004179] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:53:13,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:53:13,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-11-19 09:53:13,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915167854] [2024-11-19 09:53:13,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:53:13,918 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-19 09:53:13,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:53:13,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-19 09:53:13,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-11-19 09:53:14,052 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2024-11-19 09:53:14,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 1392 transitions, 23835 flow. Second operand has 13 states, 13 states have (on average 30.46153846153846) internal successors, (396), 13 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:53:14,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:53:14,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2024-11-19 09:53:14,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand