./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/unroll-cond-5.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 3289d67d 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/unroll-cond-5.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 052a68c73a5d1c6e7122fc0c660c02483f37277d0239d876d93b351fcdd64a16 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-17 03:43:05,087 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-17 03:43:05,139 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-17 03:43:05,145 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-17 03:43:05,145 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-17 03:43:05,172 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-17 03:43:05,173 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-17 03:43:05,174 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-17 03:43:05,174 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-17 03:43:05,175 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-17 03:43:05,176 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-17 03:43:05,176 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-17 03:43:05,177 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-17 03:43:05,177 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-17 03:43:05,178 INFO L153 SettingsManager]: * Use SBE=true [2024-11-17 03:43:05,178 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-17 03:43:05,179 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-17 03:43:05,179 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-17 03:43:05,179 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-17 03:43:05,179 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-17 03:43:05,179 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-17 03:43:05,182 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-17 03:43:05,182 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-17 03:43:05,182 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-17 03:43:05,182 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-17 03:43:05,182 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-17 03:43:05,183 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-17 03:43:05,183 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-17 03:43:05,183 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-17 03:43:05,183 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-17 03:43:05,183 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-17 03:43:05,184 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-17 03:43:05,184 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-17 03:43:05,184 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:43:05,184 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-17 03:43:05,184 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-17 03:43:05,184 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-17 03:43:05,185 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-17 03:43:05,185 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-17 03:43:05,185 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-17 03:43:05,185 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-17 03:43:05,186 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-17 03:43:05,186 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 052a68c73a5d1c6e7122fc0c660c02483f37277d0239d876d93b351fcdd64a16 [2024-11-17 03:43:05,445 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-17 03:43:05,469 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-17 03:43:05,472 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-17 03:43:05,476 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-17 03:43:05,479 INFO L274 PluginConnector]: CDTParser initialized [2024-11-17 03:43:05,480 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/unroll-cond-5.wvr.c [2024-11-17 03:43:06,804 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-17 03:43:06,946 INFO L384 CDTParser]: Found 1 translation units. [2024-11-17 03:43:06,947 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-cond-5.wvr.c [2024-11-17 03:43:06,954 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36e2f16eb/04f7d7364ef94cc1bbc9cebe5ab76bbd/FLAGc9d9d52fd [2024-11-17 03:43:07,360 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36e2f16eb/04f7d7364ef94cc1bbc9cebe5ab76bbd [2024-11-17 03:43:07,366 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-17 03:43:07,368 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-17 03:43:07,371 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-17 03:43:07,371 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-17 03:43:07,375 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-17 03:43:07,379 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:43:07" (1/1) ... [2024-11-17 03:43:07,380 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40e420cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:43:07, skipping insertion in model container [2024-11-17 03:43:07,381 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:43:07" (1/1) ... [2024-11-17 03:43:07,401 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-17 03:43:07,640 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-17 03:43:07,644 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:43:07,653 INFO L200 MainTranslator]: Completed pre-run [2024-11-17 03:43:07,676 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:43:07,700 INFO L204 MainTranslator]: Completed translation [2024-11-17 03:43:07,701 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:43:07 WrapperNode [2024-11-17 03:43:07,701 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-17 03:43:07,702 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-17 03:43:07,702 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-17 03:43:07,702 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-17 03:43:07,707 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:43:07" (1/1) ... [2024-11-17 03:43:07,715 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:43:07" (1/1) ... [2024-11-17 03:43:07,774 INFO L138 Inliner]: procedures = 23, calls = 36, calls flagged for inlining = 18, calls inlined = 18, statements flattened = 196 [2024-11-17 03:43:07,774 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-17 03:43:07,775 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-17 03:43:07,775 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-17 03:43:07,775 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-17 03:43:07,790 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:43:07" (1/1) ... [2024-11-17 03:43:07,790 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:43:07" (1/1) ... [2024-11-17 03:43:07,797 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:43:07" (1/1) ... [2024-11-17 03:43:07,834 INFO L175 MemorySlicer]: Split 13 memory accesses to 2 slices as follows [2, 11]. 85 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]. [2024-11-17 03:43:07,834 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:43:07" (1/1) ... [2024-11-17 03:43:07,834 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:43:07" (1/1) ... [2024-11-17 03:43:07,841 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:43:07" (1/1) ... [2024-11-17 03:43:07,842 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:43:07" (1/1) ... [2024-11-17 03:43:07,843 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:43:07" (1/1) ... [2024-11-17 03:43:07,844 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:43:07" (1/1) ... [2024-11-17 03:43:07,846 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-17 03:43:07,846 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-17 03:43:07,847 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-17 03:43:07,847 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-17 03:43:07,847 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:43:07" (1/1) ... [2024-11-17 03:43:07,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:43:07,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:43:07,887 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) [2024-11-17 03:43:07,889 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 [2024-11-17 03:43:07,938 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-17 03:43:07,938 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-17 03:43:07,939 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-17 03:43:07,939 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-17 03:43:07,939 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-17 03:43:07,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-17 03:43:07,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-17 03:43:07,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-17 03:43:07,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-17 03:43:07,939 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-17 03:43:07,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-17 03:43:07,940 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-17 03:43:07,940 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-17 03:43:07,940 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-17 03:43:07,941 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-17 03:43:08,037 INFO L256 CfgBuilder]: Building ICFG [2024-11-17 03:43:08,039 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-17 03:43:08,347 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-17 03:43:08,348 INFO L307 CfgBuilder]: Performing block encoding [2024-11-17 03:43:08,553 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-17 03:43:08,554 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-17 03:43:08,554 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:43:08 BoogieIcfgContainer [2024-11-17 03:43:08,554 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-17 03:43:08,556 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-17 03:43:08,556 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-17 03:43:08,558 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-17 03:43:08,559 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:43:07" (1/3) ... [2024-11-17 03:43:08,560 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ba9c0a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:43:08, skipping insertion in model container [2024-11-17 03:43:08,560 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:43:07" (2/3) ... [2024-11-17 03:43:08,561 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ba9c0a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:43:08, skipping insertion in model container [2024-11-17 03:43:08,561 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:43:08" (3/3) ... [2024-11-17 03:43:08,562 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-cond-5.wvr.c [2024-11-17 03:43:08,574 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-17 03:43:08,574 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 24 error locations. [2024-11-17 03:43:08,574 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-17 03:43:08,621 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-17 03:43:08,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 69 places, 72 transitions, 158 flow [2024-11-17 03:43:08,680 INFO L124 PetriNetUnfolderBase]: 10/70 cut-off events. [2024-11-17 03:43:08,680 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-17 03:43:08,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79 conditions, 70 events. 10/70 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 186 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 55. Up to 2 conditions per place. [2024-11-17 03:43:08,686 INFO L82 GeneralOperation]: Start removeDead. Operand has 69 places, 72 transitions, 158 flow [2024-11-17 03:43:08,688 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 69 transitions, 150 flow [2024-11-17 03:43:08,694 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-17 03:43:08,699 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;@53cf2e5a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-17 03:43:08,699 INFO L334 AbstractCegarLoop]: Starting to check reachability of 46 error locations. [2024-11-17 03:43:08,702 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-17 03:43:08,702 INFO L124 PetriNetUnfolderBase]: 2/7 cut-off events. [2024-11-17 03:43:08,702 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-17 03:43:08,702 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:43:08,702 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:43:08,703 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2024-11-17 03:43:08,706 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:43:08,706 INFO L85 PathProgramCache]: Analyzing trace with hash 18317161, now seen corresponding path program 1 times [2024-11-17 03:43:08,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:43:08,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111915366] [2024-11-17 03:43:08,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:43:08,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:43:08,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:43:08,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:43:08,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:43:08,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111915366] [2024-11-17 03:43:08,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111915366] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:43:08,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:43:08,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-17 03:43:08,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401560220] [2024-11-17 03:43:08,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:43:08,913 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:43:08,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:43:08,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:43:08,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:43:08,984 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 72 [2024-11-17 03:43:08,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 69 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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) [2024-11-17 03:43:08,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:43:08,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 72 [2024-11-17 03:43:08,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:43:09,195 INFO L124 PetriNetUnfolderBase]: 236/517 cut-off events. [2024-11-17 03:43:09,195 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-11-17 03:43:09,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 911 conditions, 517 events. 236/517 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 2901 event pairs, 146 based on Foata normal form. 41/471 useless extension candidates. Maximal degree in co-relation 792. Up to 361 conditions per place. [2024-11-17 03:43:09,206 INFO L140 encePairwiseOnDemand]: 65/72 looper letters, 29 selfloop transitions, 2 changer transitions 0/63 dead transitions. [2024-11-17 03:43:09,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 63 transitions, 200 flow [2024-11-17 03:43:09,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:43:09,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:43:09,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 141 transitions. [2024-11-17 03:43:09,232 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6527777777777778 [2024-11-17 03:43:09,233 INFO L175 Difference]: Start difference. First operand has 66 places, 69 transitions, 150 flow. Second operand 3 states and 141 transitions. [2024-11-17 03:43:09,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 63 transitions, 200 flow [2024-11-17 03:43:09,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 63 transitions, 192 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-17 03:43:09,245 INFO L231 Difference]: Finished difference. Result has 61 places, 63 transitions, 134 flow [2024-11-17 03:43:09,251 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=61, PETRI_TRANSITIONS=63} [2024-11-17 03:43:09,258 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, -5 predicate places. [2024-11-17 03:43:09,258 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 63 transitions, 134 flow [2024-11-17 03:43:09,258 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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) [2024-11-17 03:43:09,259 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:43:09,259 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:43:09,259 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-17 03:43:09,259 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2024-11-17 03:43:09,260 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:43:09,261 INFO L85 PathProgramCache]: Analyzing trace with hash 18317162, now seen corresponding path program 1 times [2024-11-17 03:43:09,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:43:09,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378537361] [2024-11-17 03:43:09,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:43:09,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:43:09,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:43:09,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:43:09,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:43:09,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378537361] [2024-11-17 03:43:09,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378537361] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:43:09,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:43:09,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:43:09,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771880648] [2024-11-17 03:43:09,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:43:09,546 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:43:09,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:43:09,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:43:09,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:43:09,628 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 72 [2024-11-17 03:43:09,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 63 transitions, 134 flow. Second operand has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 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) [2024-11-17 03:43:09,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:43:09,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 72 [2024-11-17 03:43:09,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:43:09,764 INFO L124 PetriNetUnfolderBase]: 236/520 cut-off events. [2024-11-17 03:43:09,764 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-17 03:43:09,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 897 conditions, 520 events. 236/520 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 2904 event pairs, 146 based on Foata normal form. 0/431 useless extension candidates. Maximal degree in co-relation 874. Up to 366 conditions per place. [2024-11-17 03:43:09,771 INFO L140 encePairwiseOnDemand]: 68/72 looper letters, 33 selfloop transitions, 2 changer transitions 0/65 dead transitions. [2024-11-17 03:43:09,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 65 transitions, 208 flow [2024-11-17 03:43:09,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:43:09,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:43:09,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 139 transitions. [2024-11-17 03:43:09,778 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6435185185185185 [2024-11-17 03:43:09,779 INFO L175 Difference]: Start difference. First operand has 61 places, 63 transitions, 134 flow. Second operand 3 states and 139 transitions. [2024-11-17 03:43:09,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 65 transitions, 208 flow [2024-11-17 03:43:09,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 65 transitions, 204 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:43:09,782 INFO L231 Difference]: Finished difference. Result has 62 places, 64 transitions, 144 flow [2024-11-17 03:43:09,782 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=62, PETRI_TRANSITIONS=64} [2024-11-17 03:43:09,783 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, -4 predicate places. [2024-11-17 03:43:09,784 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 64 transitions, 144 flow [2024-11-17 03:43:09,784 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 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) [2024-11-17 03:43:09,784 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:43:09,785 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-11-17 03:43:09,785 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-17 03:43:09,785 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2024-11-17 03:43:09,786 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:43:09,787 INFO L85 PathProgramCache]: Analyzing trace with hash 226288276, now seen corresponding path program 1 times [2024-11-17 03:43:09,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:43:09,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011602802] [2024-11-17 03:43:09,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:43:09,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:43:09,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:43:09,992 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:43:09,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:43:09,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011602802] [2024-11-17 03:43:09,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011602802] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:43:09,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443080790] [2024-11-17 03:43:09,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:43:09,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:43:09,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:43:09,996 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) [2024-11-17 03:43:10,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-17 03:43:10,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:43:10,058 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-17 03:43:10,061 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:43:10,107 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 [2024-11-17 03:43:10,258 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:43:10,259 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:43:10,350 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:43:10,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443080790] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:43:10,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:43:10,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-17 03:43:10,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457953183] [2024-11-17 03:43:10,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:43:10,351 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-17 03:43:10,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:43:10,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-17 03:43:10,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-17 03:43:10,520 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 72 [2024-11-17 03:43:10,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 64 transitions, 144 flow. Second operand has 11 states, 11 states have (on average 35.36363636363637) internal successors, (389), 11 states have internal predecessors, (389), 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) [2024-11-17 03:43:10,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:43:10,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 72 [2024-11-17 03:43:10,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:43:10,727 INFO L124 PetriNetUnfolderBase]: 237/524 cut-off events. [2024-11-17 03:43:10,728 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-11-17 03:43:10,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 910 conditions, 524 events. 237/524 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 2906 event pairs, 146 based on Foata normal form. 0/437 useless extension candidates. Maximal degree in co-relation 896. Up to 362 conditions per place. [2024-11-17 03:43:10,730 INFO L140 encePairwiseOnDemand]: 67/72 looper letters, 30 selfloop transitions, 8 changer transitions 0/68 dead transitions. [2024-11-17 03:43:10,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 68 transitions, 230 flow [2024-11-17 03:43:10,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-17 03:43:10,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-17 03:43:10,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 278 transitions. [2024-11-17 03:43:10,735 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5515873015873016 [2024-11-17 03:43:10,735 INFO L175 Difference]: Start difference. First operand has 62 places, 64 transitions, 144 flow. Second operand 7 states and 278 transitions. [2024-11-17 03:43:10,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 68 transitions, 230 flow [2024-11-17 03:43:10,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 68 transitions, 228 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 03:43:10,736 INFO L231 Difference]: Finished difference. Result has 66 places, 67 transitions, 166 flow [2024-11-17 03:43:10,736 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=166, PETRI_PLACES=66, PETRI_TRANSITIONS=67} [2024-11-17 03:43:10,737 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 0 predicate places. [2024-11-17 03:43:10,737 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 67 transitions, 166 flow [2024-11-17 03:43:10,737 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 35.36363636363637) internal successors, (389), 11 states have internal predecessors, (389), 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) [2024-11-17 03:43:10,737 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:43:10,737 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:43:10,752 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-17 03:43:10,938 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:43:10,939 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2024-11-17 03:43:10,939 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:43:10,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1613769935, now seen corresponding path program 1 times [2024-11-17 03:43:10,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:43:10,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316994115] [2024-11-17 03:43:10,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:43:10,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:43:10,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:43:10,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:43:10,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:43:10,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316994115] [2024-11-17 03:43:10,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316994115] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:43:10,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:43:10,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-17 03:43:10,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660021057] [2024-11-17 03:43:10,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:43:10,979 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:43:10,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:43:10,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:43:10,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:43:11,009 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 72 [2024-11-17 03:43:11,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 67 transitions, 166 flow. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 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) [2024-11-17 03:43:11,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:43:11,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 72 [2024-11-17 03:43:11,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:43:11,087 INFO L124 PetriNetUnfolderBase]: 237/469 cut-off events. [2024-11-17 03:43:11,088 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2024-11-17 03:43:11,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 861 conditions, 469 events. 237/469 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2296 event pairs, 146 based on Foata normal form. 0/437 useless extension candidates. Maximal degree in co-relation 822. Up to 361 conditions per place. [2024-11-17 03:43:11,090 INFO L140 encePairwiseOnDemand]: 60/72 looper letters, 33 selfloop transitions, 3 changer transitions 0/57 dead transitions. [2024-11-17 03:43:11,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 57 transitions, 218 flow [2024-11-17 03:43:11,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:43:11,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:43:11,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 141 transitions. [2024-11-17 03:43:11,092 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4895833333333333 [2024-11-17 03:43:11,094 INFO L175 Difference]: Start difference. First operand has 66 places, 67 transitions, 166 flow. Second operand 4 states and 141 transitions. [2024-11-17 03:43:11,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 57 transitions, 218 flow [2024-11-17 03:43:11,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 57 transitions, 209 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-11-17 03:43:11,096 INFO L231 Difference]: Finished difference. Result has 57 places, 57 transitions, 143 flow [2024-11-17 03:43:11,096 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=143, PETRI_PLACES=57, PETRI_TRANSITIONS=57} [2024-11-17 03:43:11,096 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, -9 predicate places. [2024-11-17 03:43:11,096 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 57 transitions, 143 flow [2024-11-17 03:43:11,096 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 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) [2024-11-17 03:43:11,097 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:43:11,097 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:43:11,097 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-17 03:43:11,097 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2024-11-17 03:43:11,098 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:43:11,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1613769936, now seen corresponding path program 1 times [2024-11-17 03:43:11,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:43:11,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910319387] [2024-11-17 03:43:11,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:43:11,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:43:11,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:43:11,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:43:11,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:43:11,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910319387] [2024-11-17 03:43:11,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910319387] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:43:11,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090072062] [2024-11-17 03:43:11,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:43:11,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:43:11,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:43:11,290 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) [2024-11-17 03:43:11,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-17 03:43:11,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:43:11,341 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-17 03:43:11,342 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:43:11,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:43:11,462 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:43:11,539 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 29 treesize of output 25 [2024-11-17 03:43:11,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:43:11,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090072062] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:43:11,566 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:43:11,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 10 [2024-11-17 03:43:11,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090892261] [2024-11-17 03:43:11,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:43:11,567 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-17 03:43:11,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:43:11,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-17 03:43:11,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-11-17 03:43:11,928 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 72 [2024-11-17 03:43:11,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 57 transitions, 143 flow. Second operand has 12 states, 12 states have (on average 37.083333333333336) internal successors, (445), 12 states have internal predecessors, (445), 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) [2024-11-17 03:43:11,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:43:11,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 72 [2024-11-17 03:43:11,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:43:12,129 INFO L124 PetriNetUnfolderBase]: 501/947 cut-off events. [2024-11-17 03:43:12,129 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-11-17 03:43:12,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1747 conditions, 947 events. 501/947 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 5433 event pairs, 158 based on Foata normal form. 0/854 useless extension candidates. Maximal degree in co-relation 1710. Up to 437 conditions per place. [2024-11-17 03:43:12,134 INFO L140 encePairwiseOnDemand]: 67/72 looper letters, 57 selfloop transitions, 5 changer transitions 0/82 dead transitions. [2024-11-17 03:43:12,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 82 transitions, 320 flow [2024-11-17 03:43:12,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:43:12,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:43:12,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 235 transitions. [2024-11-17 03:43:12,135 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6527777777777778 [2024-11-17 03:43:12,135 INFO L175 Difference]: Start difference. First operand has 57 places, 57 transitions, 143 flow. Second operand 5 states and 235 transitions. [2024-11-17 03:43:12,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 82 transitions, 320 flow [2024-11-17 03:43:12,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 82 transitions, 316 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:43:12,138 INFO L231 Difference]: Finished difference. Result has 60 places, 58 transitions, 158 flow [2024-11-17 03:43:12,138 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=158, PETRI_PLACES=60, PETRI_TRANSITIONS=58} [2024-11-17 03:43:12,139 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, -6 predicate places. [2024-11-17 03:43:12,140 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 58 transitions, 158 flow [2024-11-17 03:43:12,140 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 37.083333333333336) internal successors, (445), 12 states have internal predecessors, (445), 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) [2024-11-17 03:43:12,140 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:43:12,141 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:43:12,154 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-17 03:43:12,344 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:43:12,349 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2024-11-17 03:43:12,353 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:43:12,353 INFO L85 PathProgramCache]: Analyzing trace with hash -233779494, now seen corresponding path program 1 times [2024-11-17 03:43:12,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:43:12,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335856660] [2024-11-17 03:43:12,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:43:12,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:43:12,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:43:12,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:43:12,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:43:12,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335856660] [2024-11-17 03:43:12,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335856660] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:43:12,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019597396] [2024-11-17 03:43:12,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:43:12,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:43:12,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:43:12,564 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) [2024-11-17 03:43:12,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-17 03:43:12,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:43:12,631 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-17 03:43:12,632 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:43:12,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:43:12,732 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:43:12,814 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 29 treesize of output 25 [2024-11-17 03:43:12,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:43:12,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019597396] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:43:12,857 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:43:12,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 10 [2024-11-17 03:43:12,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818219016] [2024-11-17 03:43:12,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:43:12,858 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-17 03:43:12,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:43:12,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-17 03:43:12,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-11-17 03:43:13,054 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 72 [2024-11-17 03:43:13,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 58 transitions, 158 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) [2024-11-17 03:43:13,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:43:13,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 72 [2024-11-17 03:43:13,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:43:13,378 INFO L124 PetriNetUnfolderBase]: 881/1543 cut-off events. [2024-11-17 03:43:13,378 INFO L125 PetriNetUnfolderBase]: For 176/222 co-relation queries the response was YES. [2024-11-17 03:43:13,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3146 conditions, 1543 events. 881/1543 cut-off events. For 176/222 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 8965 event pairs, 165 based on Foata normal form. 0/1343 useless extension candidates. Maximal degree in co-relation 3106. Up to 1021 conditions per place. [2024-11-17 03:43:13,386 INFO L140 encePairwiseOnDemand]: 59/72 looper letters, 57 selfloop transitions, 9 changer transitions 0/78 dead transitions. [2024-11-17 03:43:13,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 78 transitions, 337 flow [2024-11-17 03:43:13,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:43:13,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:43:13,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 201 transitions. [2024-11-17 03:43:13,391 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5583333333333333 [2024-11-17 03:43:13,391 INFO L175 Difference]: Start difference. First operand has 60 places, 58 transitions, 158 flow. Second operand 5 states and 201 transitions. [2024-11-17 03:43:13,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 78 transitions, 337 flow [2024-11-17 03:43:13,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 78 transitions, 329 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-17 03:43:13,394 INFO L231 Difference]: Finished difference. Result has 62 places, 63 transitions, 206 flow [2024-11-17 03:43:13,394 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=206, PETRI_PLACES=62, PETRI_TRANSITIONS=63} [2024-11-17 03:43:13,395 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, -4 predicate places. [2024-11-17 03:43:13,395 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 63 transitions, 206 flow [2024-11-17 03:43:13,396 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) [2024-11-17 03:43:13,396 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:43:13,396 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:43:13,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-17 03:43:13,600 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:43:13,601 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2024-11-17 03:43:13,601 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:43:13,602 INFO L85 PathProgramCache]: Analyzing trace with hash -2043131295, now seen corresponding path program 1 times [2024-11-17 03:43:13,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:43:13,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555157597] [2024-11-17 03:43:13,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:43:13,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:43:13,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:43:13,783 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:43:13,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:43:13,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555157597] [2024-11-17 03:43:13,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555157597] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:43:13,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590366724] [2024-11-17 03:43:13,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:43:13,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:43:13,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:43:13,785 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) [2024-11-17 03:43:13,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-17 03:43:13,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:43:13,840 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-17 03:43:13,841 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:43:13,978 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:43:13,978 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:43:14,047 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 36 treesize of output 32 [2024-11-17 03:43:14,348 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:43:14,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590366724] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:43:14,348 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:43:14,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 17 [2024-11-17 03:43:14,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642399104] [2024-11-17 03:43:14,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:43:14,349 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-17 03:43:14,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:43:14,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-17 03:43:14,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2024-11-17 03:43:15,834 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 72 [2024-11-17 03:43:15,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 63 transitions, 206 flow. Second operand has 19 states, 19 states have (on average 35.73684210526316) internal successors, (679), 19 states have internal predecessors, (679), 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) [2024-11-17 03:43:15,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:43:15,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 72 [2024-11-17 03:43:15,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:43:16,568 INFO L124 PetriNetUnfolderBase]: 1317/2483 cut-off events. [2024-11-17 03:43:16,569 INFO L125 PetriNetUnfolderBase]: For 257/292 co-relation queries the response was YES. [2024-11-17 03:43:16,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5323 conditions, 2483 events. 1317/2483 cut-off events. For 257/292 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 16691 event pairs, 414 based on Foata normal form. 0/2401 useless extension candidates. Maximal degree in co-relation 2671. Up to 745 conditions per place. [2024-11-17 03:43:16,582 INFO L140 encePairwiseOnDemand]: 59/72 looper letters, 146 selfloop transitions, 21 changer transitions 0/186 dead transitions. [2024-11-17 03:43:16,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 186 transitions, 901 flow [2024-11-17 03:43:16,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-17 03:43:16,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-17 03:43:16,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 584 transitions. [2024-11-17 03:43:16,584 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6239316239316239 [2024-11-17 03:43:16,584 INFO L175 Difference]: Start difference. First operand has 62 places, 63 transitions, 206 flow. Second operand 13 states and 584 transitions. [2024-11-17 03:43:16,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 186 transitions, 901 flow [2024-11-17 03:43:16,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 186 transitions, 870 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-17 03:43:16,598 INFO L231 Difference]: Finished difference. Result has 72 places, 73 transitions, 283 flow [2024-11-17 03:43:16,598 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=283, PETRI_PLACES=72, PETRI_TRANSITIONS=73} [2024-11-17 03:43:16,599 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 6 predicate places. [2024-11-17 03:43:16,601 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 73 transitions, 283 flow [2024-11-17 03:43:16,601 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 35.73684210526316) internal successors, (679), 19 states have internal predecessors, (679), 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) [2024-11-17 03:43:16,602 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:43:16,602 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:43:16,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-17 03:43:16,802 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:43:16,803 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2024-11-17 03:43:16,803 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:43:16,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1342770924, now seen corresponding path program 1 times [2024-11-17 03:43:16,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:43:16,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46522455] [2024-11-17 03:43:16,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:43:16,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:43:16,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:43:16,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:43:16,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:43:16,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46522455] [2024-11-17 03:43:16,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46522455] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:43:16,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193937276] [2024-11-17 03:43:16,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:43:16,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:43:16,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:43:16,985 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) [2024-11-17 03:43:17,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-17 03:43:17,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:43:17,050 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-17 03:43:17,051 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:43:17,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:43:17,161 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:43:17,189 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 29 treesize of output 25 [2024-11-17 03:43:17,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:43:17,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193937276] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:43:17,383 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:43:17,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2024-11-17 03:43:17,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714305691] [2024-11-17 03:43:17,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:43:17,383 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-17 03:43:17,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:43:17,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-17 03:43:17,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2024-11-17 03:43:17,877 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 72 [2024-11-17 03:43:17,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 73 transitions, 283 flow. Second operand has 17 states, 17 states have (on average 28.11764705882353) internal successors, (478), 17 states have internal predecessors, (478), 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) [2024-11-17 03:43:17,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:43:17,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 72 [2024-11-17 03:43:17,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:43:18,355 INFO L124 PetriNetUnfolderBase]: 1359/2368 cut-off events. [2024-11-17 03:43:18,355 INFO L125 PetriNetUnfolderBase]: For 1105/1105 co-relation queries the response was YES. [2024-11-17 03:43:18,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5853 conditions, 2368 events. 1359/2368 cut-off events. For 1105/1105 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 14577 event pairs, 246 based on Foata normal form. 0/2258 useless extension candidates. Maximal degree in co-relation 3097. Up to 913 conditions per place. [2024-11-17 03:43:18,364 INFO L140 encePairwiseOnDemand]: 48/72 looper letters, 64 selfloop transitions, 37 changer transitions 0/111 dead transitions. [2024-11-17 03:43:18,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 111 transitions, 621 flow [2024-11-17 03:43:18,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-17 03:43:18,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-17 03:43:18,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 376 transitions. [2024-11-17 03:43:18,366 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47474747474747475 [2024-11-17 03:43:18,366 INFO L175 Difference]: Start difference. First operand has 72 places, 73 transitions, 283 flow. Second operand 11 states and 376 transitions. [2024-11-17 03:43:18,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 111 transitions, 621 flow [2024-11-17 03:43:18,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 111 transitions, 588 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-11-17 03:43:18,372 INFO L231 Difference]: Finished difference. Result has 68 places, 74 transitions, 348 flow [2024-11-17 03:43:18,372 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=348, PETRI_PLACES=68, PETRI_TRANSITIONS=74} [2024-11-17 03:43:18,372 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 2 predicate places. [2024-11-17 03:43:18,373 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 74 transitions, 348 flow [2024-11-17 03:43:18,374 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 28.11764705882353) internal successors, (478), 17 states have internal predecessors, (478), 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) [2024-11-17 03:43:18,374 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:43:18,374 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:43:18,386 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-17 03:43:18,574 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:43:18,578 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2024-11-17 03:43:18,579 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:43:18,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1759577198, now seen corresponding path program 1 times [2024-11-17 03:43:18,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:43:18,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397054089] [2024-11-17 03:43:18,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:43:18,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:43:18,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:43:18,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:43:18,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:43:18,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397054089] [2024-11-17 03:43:18,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397054089] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:43:18,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:43:18,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:43:18,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196282745] [2024-11-17 03:43:18,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:43:18,659 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:43:18,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:43:18,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:43:18,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:43:18,705 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 72 [2024-11-17 03:43:18,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 74 transitions, 348 flow. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 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) [2024-11-17 03:43:18,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:43:18,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 72 [2024-11-17 03:43:18,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:43:18,931 INFO L124 PetriNetUnfolderBase]: 1406/2437 cut-off events. [2024-11-17 03:43:18,932 INFO L125 PetriNetUnfolderBase]: For 1414/1414 co-relation queries the response was YES. [2024-11-17 03:43:18,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6343 conditions, 2437 events. 1406/2437 cut-off events. For 1414/1414 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 15072 event pairs, 379 based on Foata normal form. 2/2334 useless extension candidates. Maximal degree in co-relation 3328. Up to 1787 conditions per place. [2024-11-17 03:43:18,940 INFO L140 encePairwiseOnDemand]: 64/72 looper letters, 81 selfloop transitions, 12 changer transitions 1/106 dead transitions. [2024-11-17 03:43:18,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 106 transitions, 685 flow [2024-11-17 03:43:18,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:43:18,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:43:18,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 161 transitions. [2024-11-17 03:43:18,941 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7453703703703703 [2024-11-17 03:43:18,941 INFO L175 Difference]: Start difference. First operand has 68 places, 74 transitions, 348 flow. Second operand 3 states and 161 transitions. [2024-11-17 03:43:18,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 106 transitions, 685 flow [2024-11-17 03:43:18,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 106 transitions, 651 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-11-17 03:43:18,946 INFO L231 Difference]: Finished difference. Result has 65 places, 85 transitions, 446 flow [2024-11-17 03:43:18,947 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=446, PETRI_PLACES=65, PETRI_TRANSITIONS=85} [2024-11-17 03:43:18,947 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, -1 predicate places. [2024-11-17 03:43:18,947 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 85 transitions, 446 flow [2024-11-17 03:43:18,947 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 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) [2024-11-17 03:43:18,948 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:43:18,948 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:43:18,948 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-17 03:43:18,948 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2024-11-17 03:43:18,948 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:43:18,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1298799748, now seen corresponding path program 1 times [2024-11-17 03:43:18,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:43:18,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199407246] [2024-11-17 03:43:18,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:43:18,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:43:18,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:43:19,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:43:19,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:43:19,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199407246] [2024-11-17 03:43:19,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199407246] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:43:19,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:43:19,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-17 03:43:19,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928284873] [2024-11-17 03:43:19,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:43:19,213 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-17 03:43:19,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:43:19,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-17 03:43:19,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-17 03:43:19,260 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 72 [2024-11-17 03:43:19,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 85 transitions, 446 flow. Second operand has 7 states, 7 states have (on average 33.142857142857146) internal successors, (232), 7 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:43:19,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:43:19,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 72 [2024-11-17 03:43:19,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:43:19,768 INFO L124 PetriNetUnfolderBase]: 1991/3384 cut-off events. [2024-11-17 03:43:19,769 INFO L125 PetriNetUnfolderBase]: For 1212/1212 co-relation queries the response was YES. [2024-11-17 03:43:19,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8645 conditions, 3384 events. 1991/3384 cut-off events. For 1212/1212 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 19579 event pairs, 515 based on Foata normal form. 96/3476 useless extension candidates. Maximal degree in co-relation 4582. Up to 1170 conditions per place. [2024-11-17 03:43:19,783 INFO L140 encePairwiseOnDemand]: 62/72 looper letters, 176 selfloop transitions, 37 changer transitions 0/219 dead transitions. [2024-11-17 03:43:19,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 219 transitions, 1285 flow [2024-11-17 03:43:19,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-17 03:43:19,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-17 03:43:19,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 532 transitions. [2024-11-17 03:43:19,788 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6157407407407407 [2024-11-17 03:43:19,788 INFO L175 Difference]: Start difference. First operand has 65 places, 85 transitions, 446 flow. Second operand 12 states and 532 transitions. [2024-11-17 03:43:19,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 219 transitions, 1285 flow [2024-11-17 03:43:19,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 219 transitions, 1239 flow, removed 16 selfloop flow, removed 1 redundant places. [2024-11-17 03:43:19,794 INFO L231 Difference]: Finished difference. Result has 83 places, 92 transitions, 560 flow [2024-11-17 03:43:19,794 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=560, PETRI_PLACES=83, PETRI_TRANSITIONS=92} [2024-11-17 03:43:19,794 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 17 predicate places. [2024-11-17 03:43:19,794 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 92 transitions, 560 flow [2024-11-17 03:43:19,795 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 33.142857142857146) internal successors, (232), 7 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:43:19,795 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:43:19,795 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:43:19,795 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-17 03:43:19,795 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2024-11-17 03:43:19,795 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:43:19,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1745061560, now seen corresponding path program 1 times [2024-11-17 03:43:19,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:43:19,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405226520] [2024-11-17 03:43:19,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:43:19,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:43:19,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:43:19,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:43:19,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:43:19,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405226520] [2024-11-17 03:43:19,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405226520] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:43:19,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:43:19,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-17 03:43:19,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619410226] [2024-11-17 03:43:19,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:43:19,880 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:43:19,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:43:19,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:43:19,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:43:19,910 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 72 [2024-11-17 03:43:19,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 92 transitions, 560 flow. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 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) [2024-11-17 03:43:19,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:43:19,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 72 [2024-11-17 03:43:19,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:43:20,264 INFO L124 PetriNetUnfolderBase]: 1913/3313 cut-off events. [2024-11-17 03:43:20,264 INFO L125 PetriNetUnfolderBase]: For 4296/4296 co-relation queries the response was YES. [2024-11-17 03:43:20,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9966 conditions, 3313 events. 1913/3313 cut-off events. For 4296/4296 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 19649 event pairs, 779 based on Foata normal form. 10/3319 useless extension candidates. Maximal degree in co-relation 6889. Up to 1712 conditions per place. [2024-11-17 03:43:20,278 INFO L140 encePairwiseOnDemand]: 66/72 looper letters, 127 selfloop transitions, 22 changer transitions 0/157 dead transitions. [2024-11-17 03:43:20,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 157 transitions, 1149 flow [2024-11-17 03:43:20,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:43:20,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:43:20,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 252 transitions. [2024-11-17 03:43:20,279 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7 [2024-11-17 03:43:20,279 INFO L175 Difference]: Start difference. First operand has 83 places, 92 transitions, 560 flow. Second operand 5 states and 252 transitions. [2024-11-17 03:43:20,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 157 transitions, 1149 flow [2024-11-17 03:43:20,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 157 transitions, 1116 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-11-17 03:43:20,292 INFO L231 Difference]: Finished difference. Result has 87 places, 94 transitions, 620 flow [2024-11-17 03:43:20,292 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=530, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=620, PETRI_PLACES=87, PETRI_TRANSITIONS=94} [2024-11-17 03:43:20,293 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 21 predicate places. [2024-11-17 03:43:20,293 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 94 transitions, 620 flow [2024-11-17 03:43:20,293 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 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) [2024-11-17 03:43:20,293 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:43:20,293 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:43:20,293 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-17 03:43:20,293 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2024-11-17 03:43:20,294 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:43:20,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1748759930, now seen corresponding path program 2 times [2024-11-17 03:43:20,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:43:20,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053692910] [2024-11-17 03:43:20,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:43:20,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:43:20,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:43:20,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:43:20,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:43:20,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053692910] [2024-11-17 03:43:20,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053692910] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:43:20,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:43:20,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-17 03:43:20,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978213266] [2024-11-17 03:43:20,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:43:20,369 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:43:20,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:43:20,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:43:20,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:43:20,390 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 72 [2024-11-17 03:43:20,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 94 transitions, 620 flow. Second operand has 5 states, 5 states have (on average 34.6) internal successors, (173), 5 states have internal predecessors, (173), 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) [2024-11-17 03:43:20,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:43:20,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 72 [2024-11-17 03:43:20,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:43:20,685 INFO L124 PetriNetUnfolderBase]: 2095/3563 cut-off events. [2024-11-17 03:43:20,685 INFO L125 PetriNetUnfolderBase]: For 6484/6484 co-relation queries the response was YES. [2024-11-17 03:43:20,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11781 conditions, 3563 events. 2095/3563 cut-off events. For 6484/6484 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 20922 event pairs, 863 based on Foata normal form. 10/3569 useless extension candidates. Maximal degree in co-relation 11091. Up to 1882 conditions per place. [2024-11-17 03:43:20,702 INFO L140 encePairwiseOnDemand]: 65/72 looper letters, 119 selfloop transitions, 29 changer transitions 0/154 dead transitions. [2024-11-17 03:43:20,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 154 transitions, 1225 flow [2024-11-17 03:43:20,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:43:20,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:43:20,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 235 transitions. [2024-11-17 03:43:20,703 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6527777777777778 [2024-11-17 03:43:20,703 INFO L175 Difference]: Start difference. First operand has 87 places, 94 transitions, 620 flow. Second operand 5 states and 235 transitions. [2024-11-17 03:43:20,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 154 transitions, 1225 flow [2024-11-17 03:43:20,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 154 transitions, 1202 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-17 03:43:20,718 INFO L231 Difference]: Finished difference. Result has 92 places, 103 transitions, 782 flow [2024-11-17 03:43:20,718 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=601, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=782, PETRI_PLACES=92, PETRI_TRANSITIONS=103} [2024-11-17 03:43:20,718 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 26 predicate places. [2024-11-17 03:43:20,718 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 103 transitions, 782 flow [2024-11-17 03:43:20,718 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 34.6) internal successors, (173), 5 states have internal predecessors, (173), 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) [2024-11-17 03:43:20,719 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:43:20,719 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:43:20,719 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-17 03:43:20,719 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2024-11-17 03:43:20,719 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:43:20,719 INFO L85 PathProgramCache]: Analyzing trace with hash 743680960, now seen corresponding path program 3 times [2024-11-17 03:43:20,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:43:20,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480578463] [2024-11-17 03:43:20,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:43:20,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:43:20,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:43:20,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:43:20,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:43:20,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480578463] [2024-11-17 03:43:20,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480578463] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:43:20,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:43:20,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-17 03:43:20,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375528889] [2024-11-17 03:43:20,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:43:20,823 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-17 03:43:20,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:43:20,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-17 03:43:20,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-17 03:43:20,841 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 72 [2024-11-17 03:43:20,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 103 transitions, 782 flow. Second operand has 6 states, 6 states have (on average 34.666666666666664) internal successors, (208), 6 states have internal predecessors, (208), 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) [2024-11-17 03:43:20,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:43:20,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 72 [2024-11-17 03:43:20,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:43:21,177 INFO L124 PetriNetUnfolderBase]: 1753/3026 cut-off events. [2024-11-17 03:43:21,177 INFO L125 PetriNetUnfolderBase]: For 4964/5020 co-relation queries the response was YES. [2024-11-17 03:43:21,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9828 conditions, 3026 events. 1753/3026 cut-off events. For 4964/5020 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 17858 event pairs, 795 based on Foata normal form. 68/3066 useless extension candidates. Maximal degree in co-relation 9212. Up to 2000 conditions per place. [2024-11-17 03:43:21,195 INFO L140 encePairwiseOnDemand]: 64/72 looper letters, 111 selfloop transitions, 25 changer transitions 0/147 dead transitions. [2024-11-17 03:43:21,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 147 transitions, 1249 flow [2024-11-17 03:43:21,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 03:43:21,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 03:43:21,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 255 transitions. [2024-11-17 03:43:21,196 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5902777777777778 [2024-11-17 03:43:21,196 INFO L175 Difference]: Start difference. First operand has 92 places, 103 transitions, 782 flow. Second operand 6 states and 255 transitions. [2024-11-17 03:43:21,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 147 transitions, 1249 flow [2024-11-17 03:43:21,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 147 transitions, 1220 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-17 03:43:21,225 INFO L231 Difference]: Finished difference. Result has 98 places, 104 transitions, 833 flow [2024-11-17 03:43:21,225 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=759, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=833, PETRI_PLACES=98, PETRI_TRANSITIONS=104} [2024-11-17 03:43:21,225 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 32 predicate places. [2024-11-17 03:43:21,225 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 104 transitions, 833 flow [2024-11-17 03:43:21,226 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 34.666666666666664) internal successors, (208), 6 states have internal predecessors, (208), 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) [2024-11-17 03:43:21,226 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:43:21,226 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:43:21,226 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-17 03:43:21,226 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2024-11-17 03:43:21,226 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:43:21,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1434703868, now seen corresponding path program 1 times [2024-11-17 03:43:21,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:43:21,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27991576] [2024-11-17 03:43:21,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:43:21,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:43:21,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:43:21,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:43:21,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:43:21,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27991576] [2024-11-17 03:43:21,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27991576] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:43:21,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:43:21,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-17 03:43:21,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38626694] [2024-11-17 03:43:21,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:43:21,391 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-17 03:43:21,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:43:21,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-17 03:43:21,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-11-17 03:43:21,430 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 72 [2024-11-17 03:43:21,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 104 transitions, 833 flow. Second operand has 6 states, 6 states have (on average 34.0) internal successors, (204), 6 states have internal predecessors, (204), 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) [2024-11-17 03:43:21,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:43:21,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 72 [2024-11-17 03:43:21,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:43:21,825 INFO L124 PetriNetUnfolderBase]: 2171/3713 cut-off events. [2024-11-17 03:43:21,826 INFO L125 PetriNetUnfolderBase]: For 8416/8432 co-relation queries the response was YES. [2024-11-17 03:43:21,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12956 conditions, 3713 events. 2171/3713 cut-off events. For 8416/8432 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 22219 event pairs, 873 based on Foata normal form. 40/3749 useless extension candidates. Maximal degree in co-relation 12239. Up to 1892 conditions per place. [2024-11-17 03:43:21,846 INFO L140 encePairwiseOnDemand]: 65/72 looper letters, 131 selfloop transitions, 33 changer transitions 0/170 dead transitions. [2024-11-17 03:43:21,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 170 transitions, 1472 flow [2024-11-17 03:43:21,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 03:43:21,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 03:43:21,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 274 transitions. [2024-11-17 03:43:21,848 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6342592592592593 [2024-11-17 03:43:21,848 INFO L175 Difference]: Start difference. First operand has 98 places, 104 transitions, 833 flow. Second operand 6 states and 274 transitions. [2024-11-17 03:43:21,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 170 transitions, 1472 flow [2024-11-17 03:43:21,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 170 transitions, 1427 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-17 03:43:21,868 INFO L231 Difference]: Finished difference. Result has 101 places, 109 transitions, 929 flow [2024-11-17 03:43:21,868 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=795, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=929, PETRI_PLACES=101, PETRI_TRANSITIONS=109} [2024-11-17 03:43:21,869 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 35 predicate places. [2024-11-17 03:43:21,869 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 109 transitions, 929 flow [2024-11-17 03:43:21,869 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 34.0) internal successors, (204), 6 states have internal predecessors, (204), 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) [2024-11-17 03:43:21,869 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:43:21,869 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:43:21,869 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-17 03:43:21,869 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2024-11-17 03:43:21,869 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:43:21,870 INFO L85 PathProgramCache]: Analyzing trace with hash 103835298, now seen corresponding path program 2 times [2024-11-17 03:43:21,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:43:21,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529619265] [2024-11-17 03:43:21,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:43:21,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:43:21,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:43:21,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:43:21,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:43:21,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529619265] [2024-11-17 03:43:21,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529619265] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:43:21,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:43:21,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-17 03:43:21,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382997267] [2024-11-17 03:43:21,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:43:21,968 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-17 03:43:21,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:43:21,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-17 03:43:21,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-17 03:43:21,986 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 72 [2024-11-17 03:43:21,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 109 transitions, 929 flow. Second operand has 6 states, 6 states have (on average 34.0) internal successors, (204), 6 states have internal predecessors, (204), 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) [2024-11-17 03:43:21,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:43:21,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 72 [2024-11-17 03:43:21,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:43:22,349 INFO L124 PetriNetUnfolderBase]: 2351/4008 cut-off events. [2024-11-17 03:43:22,350 INFO L125 PetriNetUnfolderBase]: For 10200/10200 co-relation queries the response was YES. [2024-11-17 03:43:22,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14298 conditions, 4008 events. 2351/4008 cut-off events. For 10200/10200 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 24263 event pairs, 1215 based on Foata normal form. 24/4028 useless extension candidates. Maximal degree in co-relation 13268. Up to 3012 conditions per place. [2024-11-17 03:43:22,375 INFO L140 encePairwiseOnDemand]: 65/72 looper letters, 125 selfloop transitions, 34 changer transitions 0/165 dead transitions. [2024-11-17 03:43:22,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 165 transitions, 1543 flow [2024-11-17 03:43:22,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 03:43:22,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 03:43:22,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 263 transitions. [2024-11-17 03:43:22,376 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6087962962962963 [2024-11-17 03:43:22,376 INFO L175 Difference]: Start difference. First operand has 101 places, 109 transitions, 929 flow. Second operand 6 states and 263 transitions. [2024-11-17 03:43:22,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 165 transitions, 1543 flow [2024-11-17 03:43:22,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 165 transitions, 1474 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-11-17 03:43:22,403 INFO L231 Difference]: Finished difference. Result has 105 places, 117 transitions, 1052 flow [2024-11-17 03:43:22,403 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=872, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1052, PETRI_PLACES=105, PETRI_TRANSITIONS=117} [2024-11-17 03:43:22,404 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 39 predicate places. [2024-11-17 03:43:22,404 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 117 transitions, 1052 flow [2024-11-17 03:43:22,404 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 34.0) internal successors, (204), 6 states have internal predecessors, (204), 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) [2024-11-17 03:43:22,404 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:43:22,404 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:43:22,404 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-17 03:43:22,404 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2024-11-17 03:43:22,405 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:43:22,405 INFO L85 PathProgramCache]: Analyzing trace with hash 807585672, now seen corresponding path program 3 times [2024-11-17 03:43:22,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:43:22,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280234692] [2024-11-17 03:43:22,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:43:22,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:43:22,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:43:22,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:43:22,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:43:22,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280234692] [2024-11-17 03:43:22,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280234692] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:43:22,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:43:22,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-17 03:43:22,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566185512] [2024-11-17 03:43:22,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:43:22,562 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-17 03:43:22,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:43:22,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-17 03:43:22,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-17 03:43:22,591 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 72 [2024-11-17 03:43:22,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 117 transitions, 1052 flow. Second operand has 6 states, 6 states have (on average 34.0) internal successors, (204), 6 states have internal predecessors, (204), 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) [2024-11-17 03:43:22,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:43:22,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 72 [2024-11-17 03:43:22,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:43:22,992 INFO L124 PetriNetUnfolderBase]: 2447/4172 cut-off events. [2024-11-17 03:43:22,992 INFO L125 PetriNetUnfolderBase]: For 10764/10780 co-relation queries the response was YES. [2024-11-17 03:43:23,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14841 conditions, 4172 events. 2447/4172 cut-off events. For 10764/10780 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 25525 event pairs, 1369 based on Foata normal form. 28/4192 useless extension candidates. Maximal degree in co-relation 13780. Up to 3346 conditions per place. [2024-11-17 03:43:23,010 INFO L140 encePairwiseOnDemand]: 65/72 looper letters, 124 selfloop transitions, 31 changer transitions 0/161 dead transitions. [2024-11-17 03:43:23,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 161 transitions, 1576 flow [2024-11-17 03:43:23,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 03:43:23,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 03:43:23,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 253 transitions. [2024-11-17 03:43:23,011 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5856481481481481 [2024-11-17 03:43:23,011 INFO L175 Difference]: Start difference. First operand has 105 places, 117 transitions, 1052 flow. Second operand 6 states and 253 transitions. [2024-11-17 03:43:23,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 161 transitions, 1576 flow [2024-11-17 03:43:23,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 161 transitions, 1502 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-11-17 03:43:23,036 INFO L231 Difference]: Finished difference. Result has 106 places, 121 transitions, 1108 flow [2024-11-17 03:43:23,036 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=978, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1108, PETRI_PLACES=106, PETRI_TRANSITIONS=121} [2024-11-17 03:43:23,037 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 40 predicate places. [2024-11-17 03:43:23,037 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 121 transitions, 1108 flow [2024-11-17 03:43:23,037 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 34.0) internal successors, (204), 6 states have internal predecessors, (204), 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) [2024-11-17 03:43:23,037 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:43:23,037 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:43:23,037 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-17 03:43:23,038 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2024-11-17 03:43:23,038 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:43:23,038 INFO L85 PathProgramCache]: Analyzing trace with hash 52597226, now seen corresponding path program 4 times [2024-11-17 03:43:23,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:43:23,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700234783] [2024-11-17 03:43:23,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:43:23,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:43:23,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:43:23,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:43:23,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:43:23,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700234783] [2024-11-17 03:43:23,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700234783] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:43:23,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:43:23,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-17 03:43:23,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598661191] [2024-11-17 03:43:23,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:43:23,112 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:43:23,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:43:23,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:43:23,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:43:23,128 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 72 [2024-11-17 03:43:23,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 121 transitions, 1108 flow. Second operand has 5 states, 5 states have (on average 34.8) internal successors, (174), 5 states have internal predecessors, (174), 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) [2024-11-17 03:43:23,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:43:23,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 72 [2024-11-17 03:43:23,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:43:23,508 INFO L124 PetriNetUnfolderBase]: 2337/3952 cut-off events. [2024-11-17 03:43:23,508 INFO L125 PetriNetUnfolderBase]: For 10265/10281 co-relation queries the response was YES. [2024-11-17 03:43:23,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14157 conditions, 3952 events. 2337/3952 cut-off events. For 10265/10281 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 23631 event pairs, 1333 based on Foata normal form. 26/3974 useless extension candidates. Maximal degree in co-relation 12892. Up to 3308 conditions per place. [2024-11-17 03:43:23,527 INFO L140 encePairwiseOnDemand]: 65/72 looper letters, 112 selfloop transitions, 29 changer transitions 0/147 dead transitions. [2024-11-17 03:43:23,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 147 transitions, 1492 flow [2024-11-17 03:43:23,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:43:23,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:43:23,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 214 transitions. [2024-11-17 03:43:23,529 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5944444444444444 [2024-11-17 03:43:23,529 INFO L175 Difference]: Start difference. First operand has 106 places, 121 transitions, 1108 flow. Second operand 5 states and 214 transitions. [2024-11-17 03:43:23,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 147 transitions, 1492 flow [2024-11-17 03:43:23,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 147 transitions, 1412 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-11-17 03:43:23,556 INFO L231 Difference]: Finished difference. Result has 106 places, 120 transitions, 1076 flow [2024-11-17 03:43:23,557 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=1018, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1076, PETRI_PLACES=106, PETRI_TRANSITIONS=120} [2024-11-17 03:43:23,557 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 40 predicate places. [2024-11-17 03:43:23,557 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 120 transitions, 1076 flow [2024-11-17 03:43:23,557 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 34.8) internal successors, (174), 5 states have internal predecessors, (174), 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) [2024-11-17 03:43:23,557 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:43:23,558 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:43:23,558 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-17 03:43:23,558 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2024-11-17 03:43:23,558 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:43:23,558 INFO L85 PathProgramCache]: Analyzing trace with hash -135514602, now seen corresponding path program 5 times [2024-11-17 03:43:23,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:43:23,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546526804] [2024-11-17 03:43:23,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:43:23,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:43:23,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:43:23,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:43:23,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:43:23,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546526804] [2024-11-17 03:43:23,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546526804] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:43:23,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:43:23,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-17 03:43:23,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216407097] [2024-11-17 03:43:23,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:43:23,693 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-17 03:43:23,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:43:23,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-17 03:43:23,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-17 03:43:23,712 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 72 [2024-11-17 03:43:23,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 120 transitions, 1076 flow. Second operand has 6 states, 6 states have (on average 34.0) internal successors, (204), 6 states have internal predecessors, (204), 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) [2024-11-17 03:43:23,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:43:23,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 72 [2024-11-17 03:43:23,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:43:24,187 INFO L124 PetriNetUnfolderBase]: 2303/3916 cut-off events. [2024-11-17 03:43:24,187 INFO L125 PetriNetUnfolderBase]: For 9599/9615 co-relation queries the response was YES. [2024-11-17 03:43:24,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13731 conditions, 3916 events. 2303/3916 cut-off events. For 9599/9615 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 23457 event pairs, 965 based on Foata normal form. 28/3936 useless extension candidates. Maximal degree in co-relation 13050. Up to 2142 conditions per place. [2024-11-17 03:43:24,204 INFO L140 encePairwiseOnDemand]: 65/72 looper letters, 134 selfloop transitions, 36 changer transitions 0/176 dead transitions. [2024-11-17 03:43:24,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 176 transitions, 1623 flow [2024-11-17 03:43:24,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-17 03:43:24,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-17 03:43:24,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 300 transitions. [2024-11-17 03:43:24,206 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-11-17 03:43:24,206 INFO L175 Difference]: Start difference. First operand has 106 places, 120 transitions, 1076 flow. Second operand 7 states and 300 transitions. [2024-11-17 03:43:24,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 176 transitions, 1623 flow [2024-11-17 03:43:24,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 176 transitions, 1545 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-11-17 03:43:24,227 INFO L231 Difference]: Finished difference. Result has 106 places, 119 transitions, 1051 flow [2024-11-17 03:43:24,227 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=979, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1051, PETRI_PLACES=106, PETRI_TRANSITIONS=119} [2024-11-17 03:43:24,227 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 40 predicate places. [2024-11-17 03:43:24,227 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 119 transitions, 1051 flow [2024-11-17 03:43:24,227 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 34.0) internal successors, (204), 6 states have internal predecessors, (204), 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) [2024-11-17 03:43:24,227 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:43:24,227 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, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:43:24,227 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-17 03:43:24,228 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2024-11-17 03:43:24,228 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:43:24,228 INFO L85 PathProgramCache]: Analyzing trace with hash -191723183, now seen corresponding path program 1 times [2024-11-17 03:43:24,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:43:24,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172155070] [2024-11-17 03:43:24,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:43:24,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:43:24,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:43:24,341 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:43:24,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:43:24,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172155070] [2024-11-17 03:43:24,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172155070] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:43:24,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273391295] [2024-11-17 03:43:24,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:43:24,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:43:24,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:43:24,346 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) [2024-11-17 03:43:24,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-17 03:43:24,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:43:24,424 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-17 03:43:24,425 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:43:24,485 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-17 03:43:24,584 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-17 03:43:24,595 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:43:24,595 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:43:24,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-11-17 03:43:24,851 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-17 03:43:24,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 41 [2024-11-17 03:43:24,903 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:43:24,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273391295] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:43:24,903 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:43:24,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 19 [2024-11-17 03:43:24,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398442921] [2024-11-17 03:43:24,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:43:24,904 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-17 03:43:24,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:43:24,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-17 03:43:24,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2024-11-17 03:43:25,960 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 72 [2024-11-17 03:43:25,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 119 transitions, 1051 flow. Second operand has 19 states, 19 states have (on average 35.05263157894737) internal successors, (666), 19 states have internal predecessors, (666), 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) [2024-11-17 03:43:25,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:43:25,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 72 [2024-11-17 03:43:25,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:43:28,361 INFO L124 PetriNetUnfolderBase]: 3994/6995 cut-off events. [2024-11-17 03:43:28,361 INFO L125 PetriNetUnfolderBase]: For 14365/14373 co-relation queries the response was YES. [2024-11-17 03:43:28,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22691 conditions, 6995 events. 3994/6995 cut-off events. For 14365/14373 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 45798 event pairs, 418 based on Foata normal form. 67/7050 useless extension candidates. Maximal degree in co-relation 21669. Up to 1135 conditions per place. [2024-11-17 03:43:28,388 INFO L140 encePairwiseOnDemand]: 48/72 looper letters, 271 selfloop transitions, 123 changer transitions 245/645 dead transitions. [2024-11-17 03:43:28,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 645 transitions, 5010 flow [2024-11-17 03:43:28,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-17 03:43:28,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2024-11-17 03:43:28,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 1753 transitions. [2024-11-17 03:43:28,396 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6242877492877493 [2024-11-17 03:43:28,396 INFO L175 Difference]: Start difference. First operand has 106 places, 119 transitions, 1051 flow. Second operand 39 states and 1753 transitions. [2024-11-17 03:43:28,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 645 transitions, 5010 flow [2024-11-17 03:43:28,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 645 transitions, 4744 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-11-17 03:43:28,427 INFO L231 Difference]: Finished difference. Result has 169 places, 182 transitions, 1942 flow [2024-11-17 03:43:28,427 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=935, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=1942, PETRI_PLACES=169, PETRI_TRANSITIONS=182} [2024-11-17 03:43:28,428 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 103 predicate places. [2024-11-17 03:43:28,428 INFO L471 AbstractCegarLoop]: Abstraction has has 169 places, 182 transitions, 1942 flow [2024-11-17 03:43:28,428 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 35.05263157894737) internal successors, (666), 19 states have internal predecessors, (666), 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) [2024-11-17 03:43:28,428 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:43:28,428 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, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:43:28,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-17 03:43:28,628 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:43:28,629 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2024-11-17 03:43:28,629 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:43:28,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1357350569, now seen corresponding path program 2 times [2024-11-17 03:43:28,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:43:28,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386153358] [2024-11-17 03:43:28,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:43:28,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:43:28,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:43:28,890 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:43:28,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:43:28,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386153358] [2024-11-17 03:43:28,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386153358] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:43:28,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:43:28,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-17 03:43:28,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028357068] [2024-11-17 03:43:28,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:43:28,891 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-17 03:43:28,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:43:28,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-17 03:43:28,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-17 03:43:32,918 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-17 03:43:36,922 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-17 03:43:36,923 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 72 [2024-11-17 03:43:36,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 182 transitions, 1942 flow. Second operand has 8 states, 8 states have (on average 33.25) internal successors, (266), 8 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:43:36,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:43:36,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 72 [2024-11-17 03:43:36,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:43:38,016 INFO L124 PetriNetUnfolderBase]: 2786/4980 cut-off events. [2024-11-17 03:43:38,017 INFO L125 PetriNetUnfolderBase]: For 47066/47072 co-relation queries the response was YES. [2024-11-17 03:43:38,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24858 conditions, 4980 events. 2786/4980 cut-off events. For 47066/47072 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 30290 event pairs, 1307 based on Foata normal form. 48/5025 useless extension candidates. Maximal degree in co-relation 24715. Up to 3044 conditions per place. [2024-11-17 03:43:38,053 INFO L140 encePairwiseOnDemand]: 62/72 looper letters, 212 selfloop transitions, 59 changer transitions 8/285 dead transitions. [2024-11-17 03:43:38,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 285 transitions, 3503 flow [2024-11-17 03:43:38,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-17 03:43:38,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-17 03:43:38,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 383 transitions. [2024-11-17 03:43:38,055 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5910493827160493 [2024-11-17 03:43:38,055 INFO L175 Difference]: Start difference. First operand has 169 places, 182 transitions, 1942 flow. Second operand 9 states and 383 transitions. [2024-11-17 03:43:38,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 285 transitions, 3503 flow [2024-11-17 03:43:38,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 285 transitions, 3264 flow, removed 115 selfloop flow, removed 13 redundant places. [2024-11-17 03:43:38,196 INFO L231 Difference]: Finished difference. Result has 158 places, 198 transitions, 2218 flow [2024-11-17 03:43:38,196 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=1829, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2218, PETRI_PLACES=158, PETRI_TRANSITIONS=198} [2024-11-17 03:43:38,196 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 92 predicate places. [2024-11-17 03:43:38,197 INFO L471 AbstractCegarLoop]: Abstraction has has 158 places, 198 transitions, 2218 flow [2024-11-17 03:43:38,197 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 33.25) internal successors, (266), 8 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:43:38,197 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:43:38,197 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, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:43:38,197 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-17 03:43:38,197 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2024-11-17 03:43:38,197 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:43:38,198 INFO L85 PathProgramCache]: Analyzing trace with hash 890475049, now seen corresponding path program 3 times [2024-11-17 03:43:38,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:43:38,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084016470] [2024-11-17 03:43:38,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:43:38,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:43:38,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:43:38,351 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:43:38,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:43:38,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084016470] [2024-11-17 03:43:38,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084016470] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:43:38,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840988502] [2024-11-17 03:43:38,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-17 03:43:38,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:43:38,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:43:38,353 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) [2024-11-17 03:43:38,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-17 03:43:38,421 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-17 03:43:38,421 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:43:38,422 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-17 03:43:38,423 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:43:38,463 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-17 03:43:38,676 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:43:38,676 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:43:39,234 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 64 [2024-11-17 03:43:39,254 INFO L349 Elim1Store]: treesize reduction 5, result has 80.0 percent of original size [2024-11-17 03:43:39,254 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 108 treesize of output 91 [2024-11-17 03:43:39,770 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:43:39,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840988502] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:43:39,770 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:43:39,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 10] total 25 [2024-11-17 03:43:39,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320632541] [2024-11-17 03:43:39,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:43:39,771 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-17 03:43:39,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:43:39,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-17 03:43:39,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2024-11-17 03:43:41,106 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 72 [2024-11-17 03:43:41,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 198 transitions, 2218 flow. Second operand has 25 states, 25 states have (on average 32.24) internal successors, (806), 25 states have internal predecessors, (806), 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) [2024-11-17 03:43:41,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:43:41,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 72 [2024-11-17 03:43:41,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:43:42,746 INFO L124 PetriNetUnfolderBase]: 3547/6262 cut-off events. [2024-11-17 03:43:42,746 INFO L125 PetriNetUnfolderBase]: For 47192/47192 co-relation queries the response was YES. [2024-11-17 03:43:42,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29977 conditions, 6262 events. 3547/6262 cut-off events. For 47192/47192 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 39074 event pairs, 744 based on Foata normal form. 40/6300 useless extension candidates. Maximal degree in co-relation 28269. Up to 3512 conditions per place. [2024-11-17 03:43:42,794 INFO L140 encePairwiseOnDemand]: 50/72 looper letters, 197 selfloop transitions, 86 changer transitions 122/409 dead transitions. [2024-11-17 03:43:42,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 409 transitions, 4635 flow [2024-11-17 03:43:42,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-17 03:43:42,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-11-17 03:43:42,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1144 transitions. [2024-11-17 03:43:42,796 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5296296296296297 [2024-11-17 03:43:42,796 INFO L175 Difference]: Start difference. First operand has 158 places, 198 transitions, 2218 flow. Second operand 30 states and 1144 transitions. [2024-11-17 03:43:42,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 409 transitions, 4635 flow [2024-11-17 03:43:42,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 409 transitions, 4541 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-11-17 03:43:42,950 INFO L231 Difference]: Finished difference. Result has 192 places, 180 transitions, 2187 flow [2024-11-17 03:43:42,951 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=2130, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=2187, PETRI_PLACES=192, PETRI_TRANSITIONS=180} [2024-11-17 03:43:42,951 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 126 predicate places. [2024-11-17 03:43:42,951 INFO L471 AbstractCegarLoop]: Abstraction has has 192 places, 180 transitions, 2187 flow [2024-11-17 03:43:42,952 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 32.24) internal successors, (806), 25 states have internal predecessors, (806), 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) [2024-11-17 03:43:42,952 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:43:42,952 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:43:42,964 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-17 03:43:43,152 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:43:43,153 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2024-11-17 03:43:43,153 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:43:43,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1988850305, now seen corresponding path program 4 times [2024-11-17 03:43:43,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:43:43,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141551997] [2024-11-17 03:43:43,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:43:43,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:43:43,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:43:43,414 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-17 03:43:43,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:43:43,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141551997] [2024-11-17 03:43:43,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141551997] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:43:43,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409465515] [2024-11-17 03:43:43,414 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-17 03:43:43,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:43:43,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:43:43,419 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) [2024-11-17 03:43:43,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-17 03:43:43,509 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-17 03:43:43,510 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:43:43,516 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-17 03:43:43,517 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:43:43,564 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-17 03:43:43,600 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-17 03:43:43,880 INFO L349 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2024-11-17 03:43:43,880 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 40 [2024-11-17 03:43:43,926 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:43:43,926 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:43:44,529 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 250 treesize of output 230 [2024-11-17 03:43:44,741 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-17 03:43:44,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 11194 treesize of output 7674