./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/chl-word-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 023d838f 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/chl-word-symm.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 bf81f7b3bd1ceac2bf46c7c37f69effc0af9de17b18c7565156301fb49a6164e --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-023d838-m [2024-11-10 18:14:46,285 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-10 18:14:46,354 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-10 18:14:46,363 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-10 18:14:46,364 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-10 18:14:46,401 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-10 18:14:46,404 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-10 18:14:46,404 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-10 18:14:46,405 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-10 18:14:46,406 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-10 18:14:46,407 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-10 18:14:46,407 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-10 18:14:46,408 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-10 18:14:46,410 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-10 18:14:46,411 INFO L153 SettingsManager]: * Use SBE=true [2024-11-10 18:14:46,411 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-10 18:14:46,411 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-10 18:14:46,412 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-10 18:14:46,412 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-10 18:14:46,412 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-10 18:14:46,412 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-10 18:14:46,417 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-10 18:14:46,417 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-10 18:14:46,417 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-10 18:14:46,417 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-10 18:14:46,418 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-10 18:14:46,418 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-10 18:14:46,418 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-10 18:14:46,418 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-10 18:14:46,419 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-10 18:14:46,419 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-10 18:14:46,419 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-10 18:14:46,419 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-10 18:14:46,420 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 18:14:46,420 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-10 18:14:46,421 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-10 18:14:46,422 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-10 18:14:46,423 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-10 18:14:46,423 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-10 18:14:46,423 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-10 18:14:46,423 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-10 18:14:46,424 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-10 18:14:46,424 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bf81f7b3bd1ceac2bf46c7c37f69effc0af9de17b18c7565156301fb49a6164e [2024-11-10 18:14:46,706 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-10 18:14:46,759 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-10 18:14:46,762 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-10 18:14:46,763 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-10 18:14:46,764 INFO L274 PluginConnector]: CDTParser initialized [2024-11-10 18:14:46,765 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2024-11-10 18:14:48,246 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-10 18:14:48,431 INFO L384 CDTParser]: Found 1 translation units. [2024-11-10 18:14:48,432 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2024-11-10 18:14:48,441 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52efd9f65/4884afa8c0b3435d8f04186384cb38f7/FLAGc26f96568 [2024-11-10 18:14:48,826 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52efd9f65/4884afa8c0b3435d8f04186384cb38f7 [2024-11-10 18:14:48,831 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-10 18:14:48,832 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-10 18:14:48,835 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-10 18:14:48,835 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-10 18:14:48,849 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-10 18:14:48,852 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 06:14:48" (1/1) ... [2024-11-10 18:14:48,853 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@587c1617 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:14:48, skipping insertion in model container [2024-11-10 18:14:48,853 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 06:14:48" (1/1) ... [2024-11-10 18:14:48,876 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-10 18:14:49,079 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-10 18:14:49,082 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 18:14:49,092 INFO L200 MainTranslator]: Completed pre-run [2024-11-10 18:14:49,118 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 18:14:49,138 INFO L204 MainTranslator]: Completed translation [2024-11-10 18:14:49,139 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:14:49 WrapperNode [2024-11-10 18:14:49,139 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-10 18:14:49,141 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-10 18:14:49,141 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-10 18:14:49,141 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-10 18:14:49,150 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:14:49" (1/1) ... [2024-11-10 18:14:49,159 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:14:49" (1/1) ... [2024-11-10 18:14:49,185 INFO L138 Inliner]: procedures = 23, calls = 26, calls flagged for inlining = 10, calls inlined = 12, statements flattened = 123 [2024-11-10 18:14:49,185 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-10 18:14:49,191 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-10 18:14:49,191 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-10 18:14:49,191 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-10 18:14:49,202 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:14:49" (1/1) ... [2024-11-10 18:14:49,203 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:14:49" (1/1) ... [2024-11-10 18:14:49,206 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:14:49" (1/1) ... [2024-11-10 18:14:49,259 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-10 18:14:49,259 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:14:49" (1/1) ... [2024-11-10 18:14:49,260 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:14:49" (1/1) ... [2024-11-10 18:14:49,296 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:14:49" (1/1) ... [2024-11-10 18:14:49,300 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:14:49" (1/1) ... [2024-11-10 18:14:49,301 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:14:49" (1/1) ... [2024-11-10 18:14:49,308 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:14:49" (1/1) ... [2024-11-10 18:14:49,315 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-10 18:14:49,316 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-10 18:14:49,316 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-10 18:14:49,316 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-10 18:14:49,317 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:14:49" (1/1) ... [2024-11-10 18:14:49,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 18:14:49,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:14:49,377 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) [2024-11-10 18:14:49,385 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 [2024-11-10 18:14:49,420 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-10 18:14:49,420 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-10 18:14:49,420 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-10 18:14:49,420 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-10 18:14:49,421 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-10 18:14:49,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-10 18:14:49,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-10 18:14:49,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-10 18:14:49,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-10 18:14:49,422 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-10 18:14:49,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-10 18:14:49,423 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-10 18:14:49,423 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-10 18:14:49,423 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-10 18:14:49,425 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-10 18:14:49,527 INFO L256 CfgBuilder]: Building ICFG [2024-11-10 18:14:49,529 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-10 18:14:49,890 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-10 18:14:49,892 INFO L307 CfgBuilder]: Performing block encoding [2024-11-10 18:14:50,070 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-10 18:14:50,071 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-10 18:14:50,071 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 06:14:50 BoogieIcfgContainer [2024-11-10 18:14:50,071 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-10 18:14:50,073 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-10 18:14:50,073 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-10 18:14:50,075 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-10 18:14:50,076 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 06:14:48" (1/3) ... [2024-11-10 18:14:50,076 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73885ad6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 06:14:50, skipping insertion in model container [2024-11-10 18:14:50,076 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:14:49" (2/3) ... [2024-11-10 18:14:50,076 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73885ad6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 06:14:50, skipping insertion in model container [2024-11-10 18:14:50,077 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 06:14:50" (3/3) ... [2024-11-10 18:14:50,078 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-word-symm.wvr.c [2024-11-10 18:14:50,093 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-10 18:14:50,094 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2024-11-10 18:14:50,094 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-10 18:14:50,140 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-10 18:14:50,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 71 places, 76 transitions, 166 flow [2024-11-10 18:14:50,193 INFO L124 PetriNetUnfolderBase]: 12/74 cut-off events. [2024-11-10 18:14:50,193 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-10 18:14:50,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 74 events. 12/74 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 185 event pairs, 0 based on Foata normal form. 0/40 useless extension candidates. Maximal degree in co-relation 51. Up to 3 conditions per place. [2024-11-10 18:14:50,200 INFO L82 GeneralOperation]: Start removeDead. Operand has 71 places, 76 transitions, 166 flow [2024-11-10 18:14:50,204 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 68 places, 73 transitions, 158 flow [2024-11-10 18:14:50,214 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 18:14:50,220 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;@51db8a69, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 18:14:50,221 INFO L334 AbstractCegarLoop]: Starting to check reachability of 40 error locations. [2024-11-10 18:14:50,227 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 18:14:50,227 INFO L124 PetriNetUnfolderBase]: 2/7 cut-off events. [2024-11-10 18:14:50,227 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 18:14:50,228 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:14:50,228 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-10 18:14:50,230 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-10 18:14:50,234 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:14:50,234 INFO L85 PathProgramCache]: Analyzing trace with hash 16104632, now seen corresponding path program 1 times [2024-11-10 18:14:50,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:14:50,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398475754] [2024-11-10 18:14:50,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:14:50,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:14:50,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:14:50,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:14:50,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:14:50,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398475754] [2024-11-10 18:14:50,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398475754] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:14:50,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:14:50,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-10 18:14:50,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204904288] [2024-11-10 18:14:50,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:14:50,502 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:14:50,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:14:50,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:14:50,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:14:50,565 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 76 [2024-11-10 18:14:50,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 73 transitions, 158 flow. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:14:50,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:14:50,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 76 [2024-11-10 18:14:50,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:14:50,846 INFO L124 PetriNetUnfolderBase]: 206/534 cut-off events. [2024-11-10 18:14:50,847 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2024-11-10 18:14:50,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 876 conditions, 534 events. 206/534 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2879 event pairs, 115 based on Foata normal form. 32/367 useless extension candidates. Maximal degree in co-relation 806. Up to 312 conditions per place. [2024-11-10 18:14:50,865 INFO L140 encePairwiseOnDemand]: 67/76 looper letters, 28 selfloop transitions, 2 changer transitions 0/65 dead transitions. [2024-11-10 18:14:50,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 65 transitions, 202 flow [2024-11-10 18:14:50,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:14:50,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:14:50,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 151 transitions. [2024-11-10 18:14:50,878 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6622807017543859 [2024-11-10 18:14:50,880 INFO L175 Difference]: Start difference. First operand has 68 places, 73 transitions, 158 flow. Second operand 3 states and 151 transitions. [2024-11-10 18:14:50,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 65 transitions, 202 flow [2024-11-10 18:14:50,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 65 transitions, 194 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-10 18:14:50,885 INFO L231 Difference]: Finished difference. Result has 62 places, 65 transitions, 138 flow [2024-11-10 18:14:50,887 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=62, PETRI_TRANSITIONS=65} [2024-11-10 18:14:50,890 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, -6 predicate places. [2024-11-10 18:14:50,890 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 65 transitions, 138 flow [2024-11-10 18:14:50,891 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:14:50,891 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:14:50,891 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-10 18:14:50,891 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-10 18:14:50,891 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-10 18:14:50,892 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:14:50,892 INFO L85 PathProgramCache]: Analyzing trace with hash 16104633, now seen corresponding path program 1 times [2024-11-10 18:14:50,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:14:50,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041182912] [2024-11-10 18:14:50,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:14:50,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:14:50,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:14:51,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:14:51,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:14:51,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041182912] [2024-11-10 18:14:51,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041182912] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:14:51,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:14:51,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:14:51,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181342772] [2024-11-10 18:14:51,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:14:51,125 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:14:51,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:14:51,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:14:51,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 18:14:51,220 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 76 [2024-11-10 18:14:51,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 65 transitions, 138 flow. Second operand has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 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) [2024-11-10 18:14:51,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:14:51,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 76 [2024-11-10 18:14:51,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:14:51,374 INFO L124 PetriNetUnfolderBase]: 206/533 cut-off events. [2024-11-10 18:14:51,375 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-11-10 18:14:51,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 863 conditions, 533 events. 206/533 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2872 event pairs, 115 based on Foata normal form. 0/333 useless extension candidates. Maximal degree in co-relation 838. Up to 316 conditions per place. [2024-11-10 18:14:51,383 INFO L140 encePairwiseOnDemand]: 71/76 looper letters, 27 selfloop transitions, 4 changer transitions 0/64 dead transitions. [2024-11-10 18:14:51,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 64 transitions, 198 flow [2024-11-10 18:14:51,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 18:14:51,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 18:14:51,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 184 transitions. [2024-11-10 18:14:51,386 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6052631578947368 [2024-11-10 18:14:51,386 INFO L175 Difference]: Start difference. First operand has 62 places, 65 transitions, 138 flow. Second operand 4 states and 184 transitions. [2024-11-10 18:14:51,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 64 transitions, 198 flow [2024-11-10 18:14:51,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 64 transitions, 194 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:14:51,390 INFO L231 Difference]: Finished difference. Result has 62 places, 64 transitions, 140 flow [2024-11-10 18:14:51,391 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=62, PETRI_TRANSITIONS=64} [2024-11-10 18:14:51,392 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, -6 predicate places. [2024-11-10 18:14:51,393 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 64 transitions, 140 flow [2024-11-10 18:14:51,394 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 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) [2024-11-10 18:14:51,394 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:14:51,394 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:14:51,394 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-10 18:14:51,394 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-10 18:14:51,395 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:14:51,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1264111621, now seen corresponding path program 1 times [2024-11-10 18:14:51,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:14:51,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558337478] [2024-11-10 18:14:51,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:14:51,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:14:51,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:14:51,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:14:51,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:14:51,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558337478] [2024-11-10 18:14:51,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558337478] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:14:51,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:14:51,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 18:14:51,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877531110] [2024-11-10 18:14:51,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:14:51,669 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 18:14:51,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:14:51,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 18:14:51,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-10 18:14:51,795 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 76 [2024-11-10 18:14:51,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 64 transitions, 140 flow. Second operand has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 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) [2024-11-10 18:14:51,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:14:51,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 76 [2024-11-10 18:14:51,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:14:51,921 INFO L124 PetriNetUnfolderBase]: 208/543 cut-off events. [2024-11-10 18:14:51,922 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-10 18:14:51,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 884 conditions, 543 events. 208/543 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2904 event pairs, 115 based on Foata normal form. 0/343 useless extension candidates. Maximal degree in co-relation 856. Up to 319 conditions per place. [2024-11-10 18:14:51,926 INFO L140 encePairwiseOnDemand]: 68/76 looper letters, 30 selfloop transitions, 7 changer transitions 0/70 dead transitions. [2024-11-10 18:14:51,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 70 transitions, 232 flow [2024-11-10 18:14:51,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 18:14:51,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 18:14:51,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 228 transitions. [2024-11-10 18:14:51,929 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-11-10 18:14:51,930 INFO L175 Difference]: Start difference. First operand has 62 places, 64 transitions, 140 flow. Second operand 5 states and 228 transitions. [2024-11-10 18:14:51,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 70 transitions, 232 flow [2024-11-10 18:14:51,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 70 transitions, 218 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-10 18:14:51,934 INFO L231 Difference]: Finished difference. Result has 66 places, 70 transitions, 185 flow [2024-11-10 18:14:51,935 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=185, PETRI_PLACES=66, PETRI_TRANSITIONS=70} [2024-11-10 18:14:51,935 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, -2 predicate places. [2024-11-10 18:14:51,936 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 70 transitions, 185 flow [2024-11-10 18:14:51,936 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 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) [2024-11-10 18:14:51,936 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:14:51,937 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2024-11-10 18:14:51,937 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-10 18:14:51,937 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-10 18:14:51,937 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:14:51,938 INFO L85 PathProgramCache]: Analyzing trace with hash -875516087, now seen corresponding path program 1 times [2024-11-10 18:14:51,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:14:51,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713692219] [2024-11-10 18:14:51,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:14:51,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:14:51,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:14:52,137 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:14:52,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:14:52,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713692219] [2024-11-10 18:14:52,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713692219] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:14:52,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264077211] [2024-11-10 18:14:52,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:14:52,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:14:52,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:14:52,144 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) [2024-11-10 18:14:52,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-10 18:14:52,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:14:52,208 INFO L255 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-10 18:14:52,212 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:14:52,276 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-10 18:14:52,423 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:14:52,423 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:14:52,555 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:14:52,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264077211] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:14:52,556 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:14:52,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-10 18:14:52,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144176777] [2024-11-10 18:14:52,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:14:52,557 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-10 18:14:52,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:14:52,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-10 18:14:52,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-11-10 18:14:52,967 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 76 [2024-11-10 18:14:52,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 70 transitions, 185 flow. Second operand has 13 states, 13 states have (on average 37.46153846153846) internal successors, (487), 13 states have internal predecessors, (487), 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) [2024-11-10 18:14:52,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:14:52,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 76 [2024-11-10 18:14:52,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:14:53,261 INFO L124 PetriNetUnfolderBase]: 210/552 cut-off events. [2024-11-10 18:14:53,262 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-11-10 18:14:53,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 926 conditions, 552 events. 210/552 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2943 event pairs, 115 based on Foata normal form. 0/353 useless extension candidates. Maximal degree in co-relation 854. Up to 313 conditions per place. [2024-11-10 18:14:53,265 INFO L140 encePairwiseOnDemand]: 68/76 looper letters, 30 selfloop transitions, 18 changer transitions 0/79 dead transitions. [2024-11-10 18:14:53,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 79 transitions, 311 flow [2024-11-10 18:14:53,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-10 18:14:53,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-10 18:14:53,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 374 transitions. [2024-11-10 18:14:53,267 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5467836257309941 [2024-11-10 18:14:53,267 INFO L175 Difference]: Start difference. First operand has 66 places, 70 transitions, 185 flow. Second operand 9 states and 374 transitions. [2024-11-10 18:14:53,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 79 transitions, 311 flow [2024-11-10 18:14:53,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 79 transitions, 310 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 18:14:53,270 INFO L231 Difference]: Finished difference. Result has 72 places, 75 transitions, 242 flow [2024-11-10 18:14:53,270 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=242, PETRI_PLACES=72, PETRI_TRANSITIONS=75} [2024-11-10 18:14:53,271 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 4 predicate places. [2024-11-10 18:14:53,271 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 75 transitions, 242 flow [2024-11-10 18:14:53,271 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 37.46153846153846) internal successors, (487), 13 states have internal predecessors, (487), 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) [2024-11-10 18:14:53,271 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:14:53,272 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:14:53,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-10 18:14:53,475 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:14:53,476 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-10 18:14:53,477 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:14:53,477 INFO L85 PathProgramCache]: Analyzing trace with hash 770485174, now seen corresponding path program 1 times [2024-11-10 18:14:53,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:14:53,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734037759] [2024-11-10 18:14:53,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:14:53,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:14:53,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:14:53,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:14:53,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:14:53,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734037759] [2024-11-10 18:14:53,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734037759] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:14:53,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:14:53,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-10 18:14:53,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411731922] [2024-11-10 18:14:53,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:14:53,541 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 18:14:53,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:14:53,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 18:14:53,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-10 18:14:53,571 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 76 [2024-11-10 18:14:53,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 75 transitions, 242 flow. Second operand has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 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) [2024-11-10 18:14:53,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:14:53,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 76 [2024-11-10 18:14:53,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:14:53,715 INFO L124 PetriNetUnfolderBase]: 368/984 cut-off events. [2024-11-10 18:14:53,715 INFO L125 PetriNetUnfolderBase]: For 60/60 co-relation queries the response was YES. [2024-11-10 18:14:53,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1667 conditions, 984 events. 368/984 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 6247 event pairs, 197 based on Foata normal form. 16/688 useless extension candidates. Maximal degree in co-relation 960. Up to 370 conditions per place. [2024-11-10 18:14:53,721 INFO L140 encePairwiseOnDemand]: 69/76 looper letters, 81 selfloop transitions, 6 changer transitions 0/117 dead transitions. [2024-11-10 18:14:53,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 117 transitions, 547 flow [2024-11-10 18:14:53,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 18:14:53,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-10 18:14:53,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 295 transitions. [2024-11-10 18:14:53,723 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6469298245614035 [2024-11-10 18:14:53,723 INFO L175 Difference]: Start difference. First operand has 72 places, 75 transitions, 242 flow. Second operand 6 states and 295 transitions. [2024-11-10 18:14:53,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 117 transitions, 547 flow [2024-11-10 18:14:53,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 117 transitions, 479 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-11-10 18:14:53,726 INFO L231 Difference]: Finished difference. Result has 74 places, 78 transitions, 230 flow [2024-11-10 18:14:53,727 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=230, PETRI_PLACES=74, PETRI_TRANSITIONS=78} [2024-11-10 18:14:53,727 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 6 predicate places. [2024-11-10 18:14:53,727 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 78 transitions, 230 flow [2024-11-10 18:14:53,728 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 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) [2024-11-10 18:14:53,728 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:14:53,728 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:14:53,728 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-10 18:14:53,728 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-10 18:14:53,728 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:14:53,729 INFO L85 PathProgramCache]: Analyzing trace with hash 609966723, now seen corresponding path program 1 times [2024-11-10 18:14:53,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:14:53,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225069488] [2024-11-10 18:14:53,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:14:53,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:14:53,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:14:53,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:14:53,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:14:53,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225069488] [2024-11-10 18:14:53,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225069488] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:14:53,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:14:53,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 18:14:53,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628777987] [2024-11-10 18:14:53,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:14:53,778 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:14:53,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:14:53,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:14:53,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 18:14:53,814 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 76 [2024-11-10 18:14:53,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 78 transitions, 230 flow. Second operand has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 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) [2024-11-10 18:14:53,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:14:53,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 76 [2024-11-10 18:14:53,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:14:53,916 INFO L124 PetriNetUnfolderBase]: 446/1100 cut-off events. [2024-11-10 18:14:53,917 INFO L125 PetriNetUnfolderBase]: For 177/179 co-relation queries the response was YES. [2024-11-10 18:14:53,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2005 conditions, 1100 events. 446/1100 cut-off events. For 177/179 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 6613 event pairs, 280 based on Foata normal form. 0/859 useless extension candidates. Maximal degree in co-relation 1234. Up to 694 conditions per place. [2024-11-10 18:14:53,924 INFO L140 encePairwiseOnDemand]: 70/76 looper letters, 43 selfloop transitions, 4 changer transitions 0/74 dead transitions. [2024-11-10 18:14:53,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 74 transitions, 316 flow [2024-11-10 18:14:53,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 18:14:53,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 18:14:53,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 161 transitions. [2024-11-10 18:14:53,926 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5296052631578947 [2024-11-10 18:14:53,926 INFO L175 Difference]: Start difference. First operand has 74 places, 78 transitions, 230 flow. Second operand 4 states and 161 transitions. [2024-11-10 18:14:53,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 74 transitions, 316 flow [2024-11-10 18:14:53,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 74 transitions, 312 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-10 18:14:53,929 INFO L231 Difference]: Finished difference. Result has 72 places, 74 transitions, 226 flow [2024-11-10 18:14:53,929 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=226, PETRI_PLACES=72, PETRI_TRANSITIONS=74} [2024-11-10 18:14:53,930 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 4 predicate places. [2024-11-10 18:14:53,930 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 74 transitions, 226 flow [2024-11-10 18:14:53,930 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 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) [2024-11-10 18:14:53,930 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:14:53,930 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:14:53,930 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-10 18:14:53,930 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-10 18:14:53,931 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:14:53,931 INFO L85 PathProgramCache]: Analyzing trace with hash 609966724, now seen corresponding path program 1 times [2024-11-10 18:14:53,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:14:53,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017076487] [2024-11-10 18:14:53,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:14:53,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:14:53,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:14:53,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:14:53,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:14:53,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017076487] [2024-11-10 18:14:53,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017076487] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:14:53,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:14:53,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-10 18:14:53,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410619396] [2024-11-10 18:14:53,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:14:53,990 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 18:14:53,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:14:53,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 18:14:53,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-10 18:14:54,024 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 76 [2024-11-10 18:14:54,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 74 transitions, 226 flow. Second operand has 5 states, 5 states have (on average 39.2) internal successors, (196), 5 states have internal predecessors, (196), 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) [2024-11-10 18:14:54,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:14:54,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 76 [2024-11-10 18:14:54,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:14:54,161 INFO L124 PetriNetUnfolderBase]: 329/753 cut-off events. [2024-11-10 18:14:54,162 INFO L125 PetriNetUnfolderBase]: For 131/142 co-relation queries the response was YES. [2024-11-10 18:14:54,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1460 conditions, 753 events. 329/753 cut-off events. For 131/142 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 3794 event pairs, 189 based on Foata normal form. 11/613 useless extension candidates. Maximal degree in co-relation 971. Up to 373 conditions per place. [2024-11-10 18:14:54,165 INFO L140 encePairwiseOnDemand]: 69/76 looper letters, 74 selfloop transitions, 6 changer transitions 0/106 dead transitions. [2024-11-10 18:14:54,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 106 transitions, 489 flow [2024-11-10 18:14:54,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 18:14:54,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-10 18:14:54,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 288 transitions. [2024-11-10 18:14:54,166 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.631578947368421 [2024-11-10 18:14:54,167 INFO L175 Difference]: Start difference. First operand has 72 places, 74 transitions, 226 flow. Second operand 6 states and 288 transitions. [2024-11-10 18:14:54,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 106 transitions, 489 flow [2024-11-10 18:14:54,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 106 transitions, 474 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-10 18:14:54,169 INFO L231 Difference]: Finished difference. Result has 76 places, 76 transitions, 243 flow [2024-11-10 18:14:54,170 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=243, PETRI_PLACES=76, PETRI_TRANSITIONS=76} [2024-11-10 18:14:54,170 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 8 predicate places. [2024-11-10 18:14:54,170 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 76 transitions, 243 flow [2024-11-10 18:14:54,171 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 39.2) internal successors, (196), 5 states have internal predecessors, (196), 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) [2024-11-10 18:14:54,171 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:14:54,171 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:14:54,171 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-10 18:14:54,171 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-10 18:14:54,171 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:14:54,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1221996188, now seen corresponding path program 1 times [2024-11-10 18:14:54,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:14:54,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925441641] [2024-11-10 18:14:54,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:14:54,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:14:54,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:14:54,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:14:54,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:14:54,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925441641] [2024-11-10 18:14:54,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925441641] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:14:54,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:14:54,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-10 18:14:54,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871217397] [2024-11-10 18:14:54,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:14:54,229 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 18:14:54,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:14:54,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 18:14:54,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-10 18:14:54,258 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 76 [2024-11-10 18:14:54,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 76 transitions, 243 flow. Second operand has 5 states, 5 states have (on average 39.2) internal successors, (196), 5 states have internal predecessors, (196), 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) [2024-11-10 18:14:54,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:14:54,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 76 [2024-11-10 18:14:54,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:14:54,425 INFO L124 PetriNetUnfolderBase]: 539/1359 cut-off events. [2024-11-10 18:14:54,425 INFO L125 PetriNetUnfolderBase]: For 418/420 co-relation queries the response was YES. [2024-11-10 18:14:54,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2683 conditions, 1359 events. 539/1359 cut-off events. For 418/420 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 8623 event pairs, 309 based on Foata normal form. 16/1159 useless extension candidates. Maximal degree in co-relation 1861. Up to 521 conditions per place. [2024-11-10 18:14:54,433 INFO L140 encePairwiseOnDemand]: 69/76 looper letters, 78 selfloop transitions, 10 changer transitions 0/114 dead transitions. [2024-11-10 18:14:54,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 114 transitions, 536 flow [2024-11-10 18:14:54,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 18:14:54,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-10 18:14:54,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 291 transitions. [2024-11-10 18:14:54,435 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6381578947368421 [2024-11-10 18:14:54,435 INFO L175 Difference]: Start difference. First operand has 76 places, 76 transitions, 243 flow. Second operand 6 states and 291 transitions. [2024-11-10 18:14:54,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 114 transitions, 536 flow [2024-11-10 18:14:54,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 114 transitions, 529 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-10 18:14:54,439 INFO L231 Difference]: Finished difference. Result has 81 places, 81 transitions, 304 flow [2024-11-10 18:14:54,439 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=304, PETRI_PLACES=81, PETRI_TRANSITIONS=81} [2024-11-10 18:14:54,440 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 13 predicate places. [2024-11-10 18:14:54,440 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 81 transitions, 304 flow [2024-11-10 18:14:54,440 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 39.2) internal successors, (196), 5 states have internal predecessors, (196), 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) [2024-11-10 18:14:54,440 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:14:54,440 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:14:54,440 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-10 18:14:54,441 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-10 18:14:54,441 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:14:54,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1390791858, now seen corresponding path program 1 times [2024-11-10 18:14:54,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:14:54,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376441162] [2024-11-10 18:14:54,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:14:54,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:14:54,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:14:54,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:14:54,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:14:54,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376441162] [2024-11-10 18:14:54,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376441162] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:14:54,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:14:54,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-10 18:14:54,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630295617] [2024-11-10 18:14:54,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:14:54,512 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 18:14:54,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:14:54,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 18:14:54,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-10 18:14:54,546 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 76 [2024-11-10 18:14:54,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 81 transitions, 304 flow. Second operand has 5 states, 5 states have (on average 39.6) internal successors, (198), 5 states have internal predecessors, (198), 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) [2024-11-10 18:14:54,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:14:54,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 76 [2024-11-10 18:14:54,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:14:54,731 INFO L124 PetriNetUnfolderBase]: 500/1181 cut-off events. [2024-11-10 18:14:54,731 INFO L125 PetriNetUnfolderBase]: For 854/862 co-relation queries the response was YES. [2024-11-10 18:14:54,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2619 conditions, 1181 events. 500/1181 cut-off events. For 854/862 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 6812 event pairs, 302 based on Foata normal form. 11/1035 useless extension candidates. Maximal degree in co-relation 1830. Up to 524 conditions per place. [2024-11-10 18:14:54,736 INFO L140 encePairwiseOnDemand]: 69/76 looper letters, 71 selfloop transitions, 10 changer transitions 0/107 dead transitions. [2024-11-10 18:14:54,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 107 transitions, 563 flow [2024-11-10 18:14:54,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 18:14:54,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-10 18:14:54,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 284 transitions. [2024-11-10 18:14:54,738 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6228070175438597 [2024-11-10 18:14:54,738 INFO L175 Difference]: Start difference. First operand has 81 places, 81 transitions, 304 flow. Second operand 6 states and 284 transitions. [2024-11-10 18:14:54,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 107 transitions, 563 flow [2024-11-10 18:14:54,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 107 transitions, 559 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 18:14:54,742 INFO L231 Difference]: Finished difference. Result has 87 places, 85 transitions, 359 flow [2024-11-10 18:14:54,742 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=359, PETRI_PLACES=87, PETRI_TRANSITIONS=85} [2024-11-10 18:14:54,743 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 19 predicate places. [2024-11-10 18:14:54,744 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 85 transitions, 359 flow [2024-11-10 18:14:54,744 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 39.6) internal successors, (198), 5 states have internal predecessors, (198), 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) [2024-11-10 18:14:54,744 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:14:54,744 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:14:54,745 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-10 18:14:54,745 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-10 18:14:54,745 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:14:54,746 INFO L85 PathProgramCache]: Analyzing trace with hash 2057620502, now seen corresponding path program 1 times [2024-11-10 18:14:54,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:14:54,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227798996] [2024-11-10 18:14:54,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:14:54,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:14:54,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:14:54,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:14:54,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:14:54,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227798996] [2024-11-10 18:14:54,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227798996] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:14:54,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538061862] [2024-11-10 18:14:54,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:14:54,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:14:54,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:14:54,994 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) [2024-11-10 18:14:54,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-10 18:14:55,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:14:55,059 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-10 18:14:55,061 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:14:55,068 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 6 treesize of output 5 [2024-11-10 18:14:55,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 18:14:55,131 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-10 18:14:55,147 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-10 18:14:55,147 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 11 treesize of output 11 [2024-11-10 18:14:55,209 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:14:55,210 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:14:55,415 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 52 treesize of output 48 [2024-11-10 18:14:55,523 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:14:55,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538061862] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:14:55,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:14:55,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 12 [2024-11-10 18:14:55,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245585268] [2024-11-10 18:14:55,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:14:55,527 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-10 18:14:55,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:14:55,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-10 18:14:55,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2024-11-10 18:14:56,310 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 76 [2024-11-10 18:14:56,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 85 transitions, 359 flow. Second operand has 14 states, 14 states have (on average 36.07142857142857) internal successors, (505), 14 states have internal predecessors, (505), 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) [2024-11-10 18:14:56,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:14:56,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 76 [2024-11-10 18:14:56,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:14:56,880 INFO L124 PetriNetUnfolderBase]: 713/1627 cut-off events. [2024-11-10 18:14:56,880 INFO L125 PetriNetUnfolderBase]: For 1397/1433 co-relation queries the response was YES. [2024-11-10 18:14:56,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3703 conditions, 1627 events. 713/1627 cut-off events. For 1397/1433 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 9613 event pairs, 301 based on Foata normal form. 0/1439 useless extension candidates. Maximal degree in co-relation 2571. Up to 430 conditions per place. [2024-11-10 18:14:56,890 INFO L140 encePairwiseOnDemand]: 65/76 looper letters, 90 selfloop transitions, 20 changer transitions 0/137 dead transitions. [2024-11-10 18:14:56,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 137 transitions, 756 flow [2024-11-10 18:14:56,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-10 18:14:56,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-10 18:14:56,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 400 transitions. [2024-11-10 18:14:56,892 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5847953216374269 [2024-11-10 18:14:56,892 INFO L175 Difference]: Start difference. First operand has 87 places, 85 transitions, 359 flow. Second operand 9 states and 400 transitions. [2024-11-10 18:14:56,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 137 transitions, 756 flow [2024-11-10 18:14:56,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 137 transitions, 742 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-10 18:14:56,897 INFO L231 Difference]: Finished difference. Result has 93 places, 92 transitions, 450 flow [2024-11-10 18:14:56,897 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=450, PETRI_PLACES=93, PETRI_TRANSITIONS=92} [2024-11-10 18:14:56,898 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 25 predicate places. [2024-11-10 18:14:56,898 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 92 transitions, 450 flow [2024-11-10 18:14:56,899 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 36.07142857142857) internal successors, (505), 14 states have internal predecessors, (505), 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) [2024-11-10 18:14:56,899 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:14:56,899 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:14:56,913 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-10 18:14:57,099 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-10 18:14:57,100 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-10 18:14:57,101 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:14:57,101 INFO L85 PathProgramCache]: Analyzing trace with hash 2057620501, now seen corresponding path program 1 times [2024-11-10 18:14:57,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:14:57,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202943653] [2024-11-10 18:14:57,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:14:57,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:14:57,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:14:57,169 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:14:57,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:14:57,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202943653] [2024-11-10 18:14:57,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202943653] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:14:57,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:14:57,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 18:14:57,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202006359] [2024-11-10 18:14:57,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:14:57,171 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 18:14:57,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:14:57,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 18:14:57,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-10 18:14:57,243 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 76 [2024-11-10 18:14:57,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 92 transitions, 450 flow. Second operand has 5 states, 5 states have (on average 33.2) internal successors, (166), 5 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:14:57,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:14:57,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 76 [2024-11-10 18:14:57,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:14:57,404 INFO L124 PetriNetUnfolderBase]: 729/1642 cut-off events. [2024-11-10 18:14:57,404 INFO L125 PetriNetUnfolderBase]: For 2168/2192 co-relation queries the response was YES. [2024-11-10 18:14:57,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4028 conditions, 1642 events. 729/1642 cut-off events. For 2168/2192 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 9402 event pairs, 483 based on Foata normal form. 28/1527 useless extension candidates. Maximal degree in co-relation 2891. Up to 1161 conditions per place. [2024-11-10 18:14:57,415 INFO L140 encePairwiseOnDemand]: 69/76 looper letters, 55 selfloop transitions, 10 changer transitions 0/88 dead transitions. [2024-11-10 18:14:57,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 88 transitions, 572 flow [2024-11-10 18:14:57,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 18:14:57,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 18:14:57,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 192 transitions. [2024-11-10 18:14:57,417 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5052631578947369 [2024-11-10 18:14:57,417 INFO L175 Difference]: Start difference. First operand has 93 places, 92 transitions, 450 flow. Second operand 5 states and 192 transitions. [2024-11-10 18:14:57,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 88 transitions, 572 flow [2024-11-10 18:14:57,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 88 transitions, 555 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-11-10 18:14:57,421 INFO L231 Difference]: Finished difference. Result has 91 places, 88 transitions, 445 flow [2024-11-10 18:14:57,422 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=425, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=445, PETRI_PLACES=91, PETRI_TRANSITIONS=88} [2024-11-10 18:14:57,422 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 23 predicate places. [2024-11-10 18:14:57,422 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 88 transitions, 445 flow [2024-11-10 18:14:57,423 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.2) internal successors, (166), 5 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:14:57,423 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:14:57,423 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:14:57,423 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-10 18:14:57,423 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-10 18:14:57,423 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:14:57,423 INFO L85 PathProgramCache]: Analyzing trace with hash -638273411, now seen corresponding path program 1 times [2024-11-10 18:14:57,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:14:57,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882965388] [2024-11-10 18:14:57,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:14:57,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:14:57,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:14:57,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:14:57,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:14:57,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882965388] [2024-11-10 18:14:57,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882965388] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:14:57,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176434150] [2024-11-10 18:14:57,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:14:57,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:14:57,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:14:57,550 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) [2024-11-10 18:14:57,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-10 18:14:57,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:14:57,609 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-10 18:14:57,610 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:14:57,678 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:14:57,678 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:14:57,721 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-10 18:14:57,730 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:14:57,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176434150] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:14:57,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:14:57,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-11-10 18:14:57,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586689970] [2024-11-10 18:14:57,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:14:57,731 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-10 18:14:57,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:14:57,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-10 18:14:57,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-10 18:14:58,016 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 76 [2024-11-10 18:14:58,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 88 transitions, 445 flow. Second operand has 11 states, 11 states have (on average 38.90909090909091) internal successors, (428), 11 states have internal predecessors, (428), 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) [2024-11-10 18:14:58,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:14:58,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 76 [2024-11-10 18:14:58,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:14:58,326 INFO L124 PetriNetUnfolderBase]: 659/1441 cut-off events. [2024-11-10 18:14:58,327 INFO L125 PetriNetUnfolderBase]: For 1738/1768 co-relation queries the response was YES. [2024-11-10 18:14:58,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3564 conditions, 1441 events. 659/1441 cut-off events. For 1738/1768 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 7952 event pairs, 297 based on Foata normal form. 2/1343 useless extension candidates. Maximal degree in co-relation 2481. Up to 431 conditions per place. [2024-11-10 18:14:58,335 INFO L140 encePairwiseOnDemand]: 65/76 looper letters, 83 selfloop transitions, 20 changer transitions 0/127 dead transitions. [2024-11-10 18:14:58,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 127 transitions, 763 flow [2024-11-10 18:14:58,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-10 18:14:58,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-10 18:14:58,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 345 transitions. [2024-11-10 18:14:58,336 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6484962406015038 [2024-11-10 18:14:58,337 INFO L175 Difference]: Start difference. First operand has 91 places, 88 transitions, 445 flow. Second operand 7 states and 345 transitions. [2024-11-10 18:14:58,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 127 transitions, 763 flow [2024-11-10 18:14:58,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 127 transitions, 749 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-10 18:14:58,342 INFO L231 Difference]: Finished difference. Result has 95 places, 88 transitions, 492 flow [2024-11-10 18:14:58,342 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=429, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=492, PETRI_PLACES=95, PETRI_TRANSITIONS=88} [2024-11-10 18:14:58,343 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 27 predicate places. [2024-11-10 18:14:58,343 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 88 transitions, 492 flow [2024-11-10 18:14:58,343 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 38.90909090909091) internal successors, (428), 11 states have internal predecessors, (428), 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) [2024-11-10 18:14:58,343 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:14:58,343 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:14:58,359 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-10 18:14:58,544 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:14:58,545 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-10 18:14:58,545 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:14:58,545 INFO L85 PathProgramCache]: Analyzing trace with hash 596435684, now seen corresponding path program 1 times [2024-11-10 18:14:58,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:14:58,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521022593] [2024-11-10 18:14:58,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:14:58,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:14:58,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:14:58,713 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:14:58,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:14:58,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521022593] [2024-11-10 18:14:58,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521022593] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:14:58,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280263347] [2024-11-10 18:14:58,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:14:58,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:14:58,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:14:58,718 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) [2024-11-10 18:14:58,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-10 18:14:58,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:14:58,851 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-10 18:14:58,852 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:14:58,973 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:14:58,974 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:14:59,057 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-10 18:14:59,071 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:14:59,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280263347] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:14:59,072 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:14:59,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2024-11-10 18:14:59,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056457444] [2024-11-10 18:14:59,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:14:59,072 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-10 18:14:59,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:14:59,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-10 18:14:59,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-11-10 18:14:59,463 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 76 [2024-11-10 18:14:59,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 88 transitions, 492 flow. Second operand has 12 states, 12 states have (on average 38.166666666666664) internal successors, (458), 12 states have internal predecessors, (458), 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) [2024-11-10 18:14:59,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:14:59,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 76 [2024-11-10 18:14:59,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:14:59,935 INFO L124 PetriNetUnfolderBase]: 928/1916 cut-off events. [2024-11-10 18:14:59,935 INFO L125 PetriNetUnfolderBase]: For 4290/4478 co-relation queries the response was YES. [2024-11-10 18:14:59,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5168 conditions, 1916 events. 928/1916 cut-off events. For 4290/4478 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 10714 event pairs, 355 based on Foata normal form. 18/1800 useless extension candidates. Maximal degree in co-relation 4007. Up to 592 conditions per place. [2024-11-10 18:14:59,956 INFO L140 encePairwiseOnDemand]: 65/76 looper letters, 92 selfloop transitions, 20 changer transitions 0/135 dead transitions. [2024-11-10 18:14:59,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 135 transitions, 938 flow [2024-11-10 18:14:59,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-10 18:14:59,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-10 18:14:59,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 338 transitions. [2024-11-10 18:14:59,958 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6353383458646616 [2024-11-10 18:14:59,959 INFO L175 Difference]: Start difference. First operand has 95 places, 88 transitions, 492 flow. Second operand 7 states and 338 transitions. [2024-11-10 18:14:59,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 135 transitions, 938 flow [2024-11-10 18:14:59,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 135 transitions, 895 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-11-10 18:14:59,970 INFO L231 Difference]: Finished difference. Result has 97 places, 91 transitions, 536 flow [2024-11-10 18:14:59,971 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=457, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=536, PETRI_PLACES=97, PETRI_TRANSITIONS=91} [2024-11-10 18:14:59,971 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 29 predicate places. [2024-11-10 18:14:59,971 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 91 transitions, 536 flow [2024-11-10 18:14:59,972 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 38.166666666666664) internal successors, (458), 12 states have internal predecessors, (458), 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) [2024-11-10 18:14:59,972 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:14:59,972 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:14:59,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-10 18:15:00,177 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:15:00,178 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-10 18:15:00,179 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:15:00,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1578287249, now seen corresponding path program 1 times [2024-11-10 18:15:00,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:15:00,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859055495] [2024-11-10 18:15:00,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:15:00,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:15:00,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:15:00,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:15:00,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:15:00,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859055495] [2024-11-10 18:15:00,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859055495] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:15:00,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:15:00,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-10 18:15:00,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610475891] [2024-11-10 18:15:00,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:15:00,350 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:15:00,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:15:00,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:15:00,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 18:15:00,352 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 76 [2024-11-10 18:15:00,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 91 transitions, 536 flow. Second operand has 4 states, 4 states have (on average 44.0) internal successors, (176), 4 states have internal predecessors, (176), 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) [2024-11-10 18:15:00,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:15:00,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 76 [2024-11-10 18:15:00,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:15:00,705 INFO L124 PetriNetUnfolderBase]: 885/2071 cut-off events. [2024-11-10 18:15:00,706 INFO L125 PetriNetUnfolderBase]: For 4168/4260 co-relation queries the response was YES. [2024-11-10 18:15:00,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5498 conditions, 2071 events. 885/2071 cut-off events. For 4168/4260 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 13192 event pairs, 453 based on Foata normal form. 32/1996 useless extension candidates. Maximal degree in co-relation 3983. Up to 1104 conditions per place. [2024-11-10 18:15:00,776 INFO L140 encePairwiseOnDemand]: 72/76 looper letters, 79 selfloop transitions, 1 changer transitions 9/116 dead transitions. [2024-11-10 18:15:00,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 116 transitions, 821 flow [2024-11-10 18:15:00,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 18:15:00,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 18:15:00,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 211 transitions. [2024-11-10 18:15:00,777 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.694078947368421 [2024-11-10 18:15:00,777 INFO L175 Difference]: Start difference. First operand has 97 places, 91 transitions, 536 flow. Second operand 4 states and 211 transitions. [2024-11-10 18:15:00,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 116 transitions, 821 flow [2024-11-10 18:15:00,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 116 transitions, 781 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-11-10 18:15:00,784 INFO L231 Difference]: Finished difference. Result has 98 places, 91 transitions, 517 flow [2024-11-10 18:15:00,784 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=502, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=517, PETRI_PLACES=98, PETRI_TRANSITIONS=91} [2024-11-10 18:15:00,785 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 30 predicate places. [2024-11-10 18:15:00,785 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 91 transitions, 517 flow [2024-11-10 18:15:00,785 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.0) internal successors, (176), 4 states have internal predecessors, (176), 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) [2024-11-10 18:15:00,785 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:15:00,785 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:15:00,785 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-10 18:15:00,786 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-10 18:15:00,786 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:15:00,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1867975815, now seen corresponding path program 2 times [2024-11-10 18:15:00,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:15:00,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092586219] [2024-11-10 18:15:00,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:15:00,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:15:00,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:15:00,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:15:00,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:15:00,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092586219] [2024-11-10 18:15:00,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092586219] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:15:00,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:15:00,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-10 18:15:00,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528843439] [2024-11-10 18:15:00,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:15:00,918 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:15:00,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:15:00,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:15:00,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 18:15:00,919 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 76 [2024-11-10 18:15:00,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 91 transitions, 517 flow. Second operand has 4 states, 4 states have (on average 44.0) internal successors, (176), 4 states have internal predecessors, (176), 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) [2024-11-10 18:15:00,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:15:00,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 76 [2024-11-10 18:15:00,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:15:01,262 INFO L124 PetriNetUnfolderBase]: 973/2239 cut-off events. [2024-11-10 18:15:01,263 INFO L125 PetriNetUnfolderBase]: For 4595/4735 co-relation queries the response was YES. [2024-11-10 18:15:01,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6082 conditions, 2239 events. 973/2239 cut-off events. For 4595/4735 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 14819 event pairs, 607 based on Foata normal form. 32/2146 useless extension candidates. Maximal degree in co-relation 6016. Up to 1377 conditions per place. [2024-11-10 18:15:01,285 INFO L140 encePairwiseOnDemand]: 72/76 looper letters, 79 selfloop transitions, 1 changer transitions 7/114 dead transitions. [2024-11-10 18:15:01,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 114 transitions, 806 flow [2024-11-10 18:15:01,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 18:15:01,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 18:15:01,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 209 transitions. [2024-11-10 18:15:01,287 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6875 [2024-11-10 18:15:01,287 INFO L175 Difference]: Start difference. First operand has 98 places, 91 transitions, 517 flow. Second operand 4 states and 209 transitions. [2024-11-10 18:15:01,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 114 transitions, 806 flow [2024-11-10 18:15:01,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 114 transitions, 800 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-11-10 18:15:01,296 INFO L231 Difference]: Finished difference. Result has 100 places, 91 transitions, 529 flow [2024-11-10 18:15:01,296 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=514, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=529, PETRI_PLACES=100, PETRI_TRANSITIONS=91} [2024-11-10 18:15:01,297 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 32 predicate places. [2024-11-10 18:15:01,297 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 91 transitions, 529 flow [2024-11-10 18:15:01,298 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.0) internal successors, (176), 4 states have internal predecessors, (176), 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) [2024-11-10 18:15:01,298 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:15:01,298 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] [2024-11-10 18:15:01,298 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-10 18:15:01,298 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-10 18:15:01,299 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:15:01,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1309637510, now seen corresponding path program 1 times [2024-11-10 18:15:01,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:15:01,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206713446] [2024-11-10 18:15:01,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:15:01,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:15:01,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:15:01,586 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:15:01,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:15:01,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206713446] [2024-11-10 18:15:01,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206713446] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:15:01,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636034846] [2024-11-10 18:15:01,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:15:01,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:15:01,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:15:01,589 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) [2024-11-10 18:15:01,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-10 18:15:01,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:15:01,677 INFO L255 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-10 18:15:01,680 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:15:01,688 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 6 treesize of output 5 [2024-11-10 18:15:01,696 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-10 18:15:01,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 18:15:01,790 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-10 18:15:01,804 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-10 18:15:01,805 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 11 treesize of output 11 [2024-11-10 18:15:01,922 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:15:01,922 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:15:02,197 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:15:02,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636034846] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-10 18:15:02,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-10 18:15:02,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 12 [2024-11-10 18:15:02,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735106435] [2024-11-10 18:15:02,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:15:02,199 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-10 18:15:02,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:15:02,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-10 18:15:02,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2024-11-10 18:15:02,421 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 76 [2024-11-10 18:15:02,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 91 transitions, 529 flow. Second operand has 6 states, 6 states have (on average 39.166666666666664) internal successors, (235), 6 states have internal predecessors, (235), 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) [2024-11-10 18:15:02,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:15:02,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 76 [2024-11-10 18:15:02,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:15:02,816 INFO L124 PetriNetUnfolderBase]: 1069/2258 cut-off events. [2024-11-10 18:15:02,816 INFO L125 PetriNetUnfolderBase]: For 5409/5614 co-relation queries the response was YES. [2024-11-10 18:15:02,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6555 conditions, 2258 events. 1069/2258 cut-off events. For 5409/5614 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 14193 event pairs, 604 based on Foata normal form. 18/2182 useless extension candidates. Maximal degree in co-relation 6488. Up to 852 conditions per place. [2024-11-10 18:15:02,834 INFO L140 encePairwiseOnDemand]: 65/76 looper letters, 80 selfloop transitions, 20 changer transitions 0/124 dead transitions. [2024-11-10 18:15:02,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 124 transitions, 889 flow [2024-11-10 18:15:02,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-10 18:15:02,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-10 18:15:02,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 371 transitions. [2024-11-10 18:15:02,836 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6101973684210527 [2024-11-10 18:15:02,836 INFO L175 Difference]: Start difference. First operand has 100 places, 91 transitions, 529 flow. Second operand 8 states and 371 transitions. [2024-11-10 18:15:02,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 124 transitions, 889 flow [2024-11-10 18:15:02,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 124 transitions, 883 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-11-10 18:15:02,843 INFO L231 Difference]: Finished difference. Result has 105 places, 91 transitions, 589 flow [2024-11-10 18:15:02,843 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=524, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=589, PETRI_PLACES=105, PETRI_TRANSITIONS=91} [2024-11-10 18:15:02,843 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 37 predicate places. [2024-11-10 18:15:02,844 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 91 transitions, 589 flow [2024-11-10 18:15:02,844 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 39.166666666666664) internal successors, (235), 6 states have internal predecessors, (235), 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) [2024-11-10 18:15:02,844 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:15:02,844 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:15:02,863 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-10 18:15:03,048 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-10 18:15:03,049 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-10 18:15:03,049 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:15:03,049 INFO L85 PathProgramCache]: Analyzing trace with hash -392740461, now seen corresponding path program 1 times [2024-11-10 18:15:03,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:15:03,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501352697] [2024-11-10 18:15:03,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:15:03,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:15:03,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:15:03,134 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:15:03,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:15:03,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501352697] [2024-11-10 18:15:03,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501352697] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:15:03,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862244669] [2024-11-10 18:15:03,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:15:03,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:15:03,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:15:03,137 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) [2024-11-10 18:15:03,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-10 18:15:03,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:15:03,201 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-10 18:15:03,202 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:15:03,280 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:15:03,280 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:15:03,353 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:15:03,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862244669] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:15:03,354 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:15:03,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 16 [2024-11-10 18:15:03,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243234199] [2024-11-10 18:15:03,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:15:03,355 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-10 18:15:03,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:15:03,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-10 18:15:03,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-11-10 18:15:03,621 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 76 [2024-11-10 18:15:03,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 91 transitions, 589 flow. Second operand has 16 states, 16 states have (on average 39.375) internal successors, (630), 16 states have internal predecessors, (630), 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) [2024-11-10 18:15:03,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:15:03,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 76 [2024-11-10 18:15:03,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:15:04,556 INFO L124 PetriNetUnfolderBase]: 2669/5905 cut-off events. [2024-11-10 18:15:04,557 INFO L125 PetriNetUnfolderBase]: For 17807/18089 co-relation queries the response was YES. [2024-11-10 18:15:04,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18092 conditions, 5905 events. 2669/5905 cut-off events. For 17807/18089 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 47029 event pairs, 1511 based on Foata normal form. 90/5748 useless extension candidates. Maximal degree in co-relation 8311. Up to 1072 conditions per place. [2024-11-10 18:15:04,596 INFO L140 encePairwiseOnDemand]: 63/76 looper letters, 217 selfloop transitions, 52 changer transitions 0/291 dead transitions. [2024-11-10 18:15:04,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 291 transitions, 2423 flow [2024-11-10 18:15:04,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-10 18:15:04,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-10 18:15:04,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1204 transitions. [2024-11-10 18:15:04,599 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5867446393762183 [2024-11-10 18:15:04,599 INFO L175 Difference]: Start difference. First operand has 105 places, 91 transitions, 589 flow. Second operand 27 states and 1204 transitions. [2024-11-10 18:15:04,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 291 transitions, 2423 flow [2024-11-10 18:15:04,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 291 transitions, 2356 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-11-10 18:15:04,621 INFO L231 Difference]: Finished difference. Result has 133 places, 119 transitions, 967 flow [2024-11-10 18:15:04,621 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=559, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=967, PETRI_PLACES=133, PETRI_TRANSITIONS=119} [2024-11-10 18:15:04,621 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 65 predicate places. [2024-11-10 18:15:04,622 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 119 transitions, 967 flow [2024-11-10 18:15:04,623 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 39.375) internal successors, (630), 16 states have internal predecessors, (630), 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) [2024-11-10 18:15:04,623 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:15:04,623 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:15:04,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-10 18:15:04,827 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-10 18:15:04,828 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-10 18:15:04,829 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:15:04,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1430948319, now seen corresponding path program 1 times [2024-11-10 18:15:04,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:15:04,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692124302] [2024-11-10 18:15:04,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:15:04,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:15:04,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:15:04,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:15:04,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:15:04,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692124302] [2024-11-10 18:15:04,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692124302] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:15:04,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:15:04,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 18:15:04,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628056632] [2024-11-10 18:15:04,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:15:04,857 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:15:04,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:15:04,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:15:04,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:15:04,858 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 76 [2024-11-10 18:15:04,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 119 transitions, 967 flow. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:15:04,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:15:04,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 76 [2024-11-10 18:15:04,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:15:05,228 INFO L124 PetriNetUnfolderBase]: 1858/4342 cut-off events. [2024-11-10 18:15:05,228 INFO L125 PetriNetUnfolderBase]: For 17158/17558 co-relation queries the response was YES. [2024-11-10 18:15:05,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14036 conditions, 4342 events. 1858/4342 cut-off events. For 17158/17558 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 33544 event pairs, 653 based on Foata normal form. 194/4420 useless extension candidates. Maximal degree in co-relation 13982. Up to 2532 conditions per place. [2024-11-10 18:15:05,260 INFO L140 encePairwiseOnDemand]: 72/76 looper letters, 91 selfloop transitions, 13 changer transitions 5/140 dead transitions. [2024-11-10 18:15:05,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 140 transitions, 1367 flow [2024-11-10 18:15:05,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:15:05,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:15:05,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 162 transitions. [2024-11-10 18:15:05,262 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7105263157894737 [2024-11-10 18:15:05,262 INFO L175 Difference]: Start difference. First operand has 133 places, 119 transitions, 967 flow. Second operand 3 states and 162 transitions. [2024-11-10 18:15:05,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 140 transitions, 1367 flow [2024-11-10 18:15:05,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 140 transitions, 1325 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-11-10 18:15:05,282 INFO L231 Difference]: Finished difference. Result has 132 places, 130 transitions, 1142 flow [2024-11-10 18:15:05,282 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=925, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1142, PETRI_PLACES=132, PETRI_TRANSITIONS=130} [2024-11-10 18:15:05,282 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 64 predicate places. [2024-11-10 18:15:05,282 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 130 transitions, 1142 flow [2024-11-10 18:15:05,283 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:15:05,283 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:15:05,283 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:15:05,283 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-10 18:15:05,283 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-10 18:15:05,283 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:15:05,283 INFO L85 PathProgramCache]: Analyzing trace with hash 2082611739, now seen corresponding path program 1 times [2024-11-10 18:15:05,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:15:05,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248487427] [2024-11-10 18:15:05,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:15:05,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:15:05,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:15:05,355 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:15:05,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:15:05,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248487427] [2024-11-10 18:15:05,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248487427] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:15:05,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776923696] [2024-11-10 18:15:05,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:15:05,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:15:05,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:15:05,357 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) [2024-11-10 18:15:05,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-10 18:15:05,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:15:05,428 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-10 18:15:05,431 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:15:05,506 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:15:05,506 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:15:05,581 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:15:05,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776923696] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:15:05,582 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:15:05,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2024-11-10 18:15:05,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12596971] [2024-11-10 18:15:05,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:15:05,582 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-10 18:15:05,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:15:05,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-10 18:15:05,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-11-10 18:15:05,824 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 76 [2024-11-10 18:15:05,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 130 transitions, 1142 flow. Second operand has 16 states, 16 states have (on average 39.625) internal successors, (634), 16 states have internal predecessors, (634), 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) [2024-11-10 18:15:05,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:15:05,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 76 [2024-11-10 18:15:05,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:15:06,502 INFO L124 PetriNetUnfolderBase]: 1581/3566 cut-off events. [2024-11-10 18:15:06,502 INFO L125 PetriNetUnfolderBase]: For 17617/18056 co-relation queries the response was YES. [2024-11-10 18:15:06,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12147 conditions, 3566 events. 1581/3566 cut-off events. For 17617/18056 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 26029 event pairs, 792 based on Foata normal form. 67/3580 useless extension candidates. Maximal degree in co-relation 12092. Up to 757 conditions per place. [2024-11-10 18:15:06,531 INFO L140 encePairwiseOnDemand]: 63/76 looper letters, 188 selfloop transitions, 61 changer transitions 0/271 dead transitions. [2024-11-10 18:15:06,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 271 transitions, 2556 flow [2024-11-10 18:15:06,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-10 18:15:06,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-10 18:15:06,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1184 transitions. [2024-11-10 18:15:06,533 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5769980506822612 [2024-11-10 18:15:06,533 INFO L175 Difference]: Start difference. First operand has 132 places, 130 transitions, 1142 flow. Second operand 27 states and 1184 transitions. [2024-11-10 18:15:06,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 271 transitions, 2556 flow [2024-11-10 18:15:06,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 271 transitions, 2462 flow, removed 47 selfloop flow, removed 2 redundant places. [2024-11-10 18:15:06,552 INFO L231 Difference]: Finished difference. Result has 157 places, 151 transitions, 1473 flow [2024-11-10 18:15:06,552 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=1090, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1473, PETRI_PLACES=157, PETRI_TRANSITIONS=151} [2024-11-10 18:15:06,552 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 89 predicate places. [2024-11-10 18:15:06,553 INFO L471 AbstractCegarLoop]: Abstraction has has 157 places, 151 transitions, 1473 flow [2024-11-10 18:15:06,553 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 39.625) internal successors, (634), 16 states have internal predecessors, (634), 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) [2024-11-10 18:15:06,553 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:15:06,553 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:15:06,570 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-10 18:15:06,753 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:15:06,754 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-10 18:15:06,755 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:15:06,755 INFO L85 PathProgramCache]: Analyzing trace with hash 53840323, now seen corresponding path program 1 times [2024-11-10 18:15:06,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:15:06,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764988697] [2024-11-10 18:15:06,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:15:06,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:15:06,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:15:06,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:15:06,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:15:06,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764988697] [2024-11-10 18:15:06,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764988697] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:15:06,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:15:06,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-10 18:15:06,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676724097] [2024-11-10 18:15:06,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:15:06,975 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-10 18:15:06,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:15:06,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-10 18:15:06,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-10 18:15:07,021 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 76 [2024-11-10 18:15:07,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 151 transitions, 1473 flow. Second operand has 7 states, 7 states have (on average 40.857142857142854) internal successors, (286), 7 states have internal predecessors, (286), 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) [2024-11-10 18:15:07,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:15:07,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 76 [2024-11-10 18:15:07,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:15:07,442 INFO L124 PetriNetUnfolderBase]: 1560/3395 cut-off events. [2024-11-10 18:15:07,442 INFO L125 PetriNetUnfolderBase]: For 20341/20877 co-relation queries the response was YES. [2024-11-10 18:15:07,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12739 conditions, 3395 events. 1560/3395 cut-off events. For 20341/20877 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 24258 event pairs, 460 based on Foata normal form. 16/3339 useless extension candidates. Maximal degree in co-relation 12676. Up to 1698 conditions per place. [2024-11-10 18:15:07,470 INFO L140 encePairwiseOnDemand]: 64/76 looper letters, 162 selfloop transitions, 31 changer transitions 18/234 dead transitions. [2024-11-10 18:15:07,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 234 transitions, 2645 flow [2024-11-10 18:15:07,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-10 18:15:07,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-10 18:15:07,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 424 transitions. [2024-11-10 18:15:07,472 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6198830409356725 [2024-11-10 18:15:07,472 INFO L175 Difference]: Start difference. First operand has 157 places, 151 transitions, 1473 flow. Second operand 9 states and 424 transitions. [2024-11-10 18:15:07,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 234 transitions, 2645 flow [2024-11-10 18:15:07,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 234 transitions, 2519 flow, removed 22 selfloop flow, removed 18 redundant places. [2024-11-10 18:15:07,492 INFO L231 Difference]: Finished difference. Result has 151 places, 170 transitions, 1731 flow [2024-11-10 18:15:07,493 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=1378, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1731, PETRI_PLACES=151, PETRI_TRANSITIONS=170} [2024-11-10 18:15:07,493 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 83 predicate places. [2024-11-10 18:15:07,493 INFO L471 AbstractCegarLoop]: Abstraction has has 151 places, 170 transitions, 1731 flow [2024-11-10 18:15:07,494 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 40.857142857142854) internal successors, (286), 7 states have internal predecessors, (286), 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) [2024-11-10 18:15:07,494 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:15:07,494 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:15:07,494 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-10 18:15:07,494 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-10 18:15:07,494 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:15:07,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1644693363, now seen corresponding path program 2 times [2024-11-10 18:15:07,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:15:07,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297700484] [2024-11-10 18:15:07,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:15:07,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:15:07,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:15:07,692 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-10 18:15:07,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:15:07,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297700484] [2024-11-10 18:15:07,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297700484] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:15:07,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932239673] [2024-11-10 18:15:07,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 18:15:07,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:15:07,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:15:07,695 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) [2024-11-10 18:15:07,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-10 18:15:07,760 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 18:15:07,760 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:15:07,761 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-10 18:15:07,763 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:15:07,768 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 6 treesize of output 5 [2024-11-10 18:15:07,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 18:15:07,837 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-10 18:15:07,841 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-10 18:15:07,842 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 11 treesize of output 11 [2024-11-10 18:15:07,928 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-10 18:15:07,929 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:15:08,067 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 52 treesize of output 48 [2024-11-10 18:15:08,185 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-10 18:15:08,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932239673] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:15:08,186 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:15:08,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2024-11-10 18:15:08,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752459476] [2024-11-10 18:15:08,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:15:08,186 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-10 18:15:08,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:15:08,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-10 18:15:08,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2024-11-10 18:15:09,465 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 76 [2024-11-10 18:15:09,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 170 transitions, 1731 flow. Second operand has 20 states, 20 states have (on average 36.25) internal successors, (725), 20 states have internal predecessors, (725), 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) [2024-11-10 18:15:09,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:15:09,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 76 [2024-11-10 18:15:09,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:15:10,488 INFO L124 PetriNetUnfolderBase]: 2074/4388 cut-off events. [2024-11-10 18:15:10,489 INFO L125 PetriNetUnfolderBase]: For 25752/26273 co-relation queries the response was YES. [2024-11-10 18:15:10,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17103 conditions, 4388 events. 2074/4388 cut-off events. For 25752/26273 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 31193 event pairs, 740 based on Foata normal form. 36/4339 useless extension candidates. Maximal degree in co-relation 17038. Up to 1020 conditions per place. [2024-11-10 18:15:10,527 INFO L140 encePairwiseOnDemand]: 66/76 looper letters, 213 selfloop transitions, 46 changer transitions 0/286 dead transitions. [2024-11-10 18:15:10,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 286 transitions, 3169 flow [2024-11-10 18:15:10,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-10 18:15:10,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-10 18:15:10,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 572 transitions. [2024-11-10 18:15:10,529 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5789473684210527 [2024-11-10 18:15:10,529 INFO L175 Difference]: Start difference. First operand has 151 places, 170 transitions, 1731 flow. Second operand 13 states and 572 transitions. [2024-11-10 18:15:10,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 286 transitions, 3169 flow [2024-11-10 18:15:10,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 286 transitions, 3072 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-11-10 18:15:10,559 INFO L231 Difference]: Finished difference. Result has 160 places, 179 transitions, 1913 flow [2024-11-10 18:15:10,560 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=1662, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1913, PETRI_PLACES=160, PETRI_TRANSITIONS=179} [2024-11-10 18:15:10,560 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 92 predicate places. [2024-11-10 18:15:10,560 INFO L471 AbstractCegarLoop]: Abstraction has has 160 places, 179 transitions, 1913 flow [2024-11-10 18:15:10,561 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 36.25) internal successors, (725), 20 states have internal predecessors, (725), 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) [2024-11-10 18:15:10,561 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:15:10,561 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] [2024-11-10 18:15:10,576 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-10 18:15:10,765 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-10 18:15:10,766 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-10 18:15:10,767 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:15:10,767 INFO L85 PathProgramCache]: Analyzing trace with hash -416274703, now seen corresponding path program 1 times [2024-11-10 18:15:10,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:15:10,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029678448] [2024-11-10 18:15:10,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:15:10,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:15:10,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:15:10,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:15:10,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:15:10,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029678448] [2024-11-10 18:15:10,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029678448] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:15:10,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996620834] [2024-11-10 18:15:10,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:15:10,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:15:10,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:15:10,974 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:15:10,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-10 18:15:11,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:15:11,041 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-10 18:15:11,043 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:15:11,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:15:11,297 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:15:11,667 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:15:11,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996620834] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-10 18:15:11,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-10 18:15:11,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 26 [2024-11-10 18:15:11,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511513325] [2024-11-10 18:15:11,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:15:11,668 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-10 18:15:11,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:15:11,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-10 18:15:11,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2024-11-10 18:15:11,751 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 76 [2024-11-10 18:15:11,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 179 transitions, 1913 flow. Second operand has 10 states, 10 states have (on average 40.2) internal successors, (402), 10 states have internal predecessors, (402), 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) [2024-11-10 18:15:11,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:15:11,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 76 [2024-11-10 18:15:11,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:15:12,384 INFO L124 PetriNetUnfolderBase]: 1680/3649 cut-off events. [2024-11-10 18:15:12,384 INFO L125 PetriNetUnfolderBase]: For 28059/28737 co-relation queries the response was YES. [2024-11-10 18:15:12,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14779 conditions, 3649 events. 1680/3649 cut-off events. For 28059/28737 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 26177 event pairs, 402 based on Foata normal form. 43/3618 useless extension candidates. Maximal degree in co-relation 13566. Up to 1671 conditions per place. [2024-11-10 18:15:12,411 INFO L140 encePairwiseOnDemand]: 62/76 looper letters, 157 selfloop transitions, 56 changer transitions 15/253 dead transitions. [2024-11-10 18:15:12,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 253 transitions, 2934 flow [2024-11-10 18:15:12,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-10 18:15:12,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-10 18:15:12,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 549 transitions. [2024-11-10 18:15:12,413 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6019736842105263 [2024-11-10 18:15:12,413 INFO L175 Difference]: Start difference. First operand has 160 places, 179 transitions, 1913 flow. Second operand 12 states and 549 transitions. [2024-11-10 18:15:12,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 253 transitions, 2934 flow [2024-11-10 18:15:12,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 253 transitions, 2906 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-11-10 18:15:12,441 INFO L231 Difference]: Finished difference. Result has 172 places, 183 transitions, 2051 flow [2024-11-10 18:15:12,442 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=1885, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2051, PETRI_PLACES=172, PETRI_TRANSITIONS=183} [2024-11-10 18:15:12,442 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 104 predicate places. [2024-11-10 18:15:12,442 INFO L471 AbstractCegarLoop]: Abstraction has has 172 places, 183 transitions, 2051 flow [2024-11-10 18:15:12,443 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 40.2) internal successors, (402), 10 states have internal predecessors, (402), 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) [2024-11-10 18:15:12,443 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:15:12,443 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] [2024-11-10 18:15:12,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-10 18:15:12,647 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:15:12,648 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-10 18:15:12,648 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:15:12,648 INFO L85 PathProgramCache]: Analyzing trace with hash 643115993, now seen corresponding path program 2 times [2024-11-10 18:15:12,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:15:12,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512427912] [2024-11-10 18:15:12,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:15:12,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:15:12,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:15:12,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:15:12,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:15:12,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512427912] [2024-11-10 18:15:12,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512427912] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:15:12,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980605888] [2024-11-10 18:15:12,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 18:15:12,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:15:12,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:15:12,823 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:15:12,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-10 18:15:12,888 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-10 18:15:12,888 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:15:12,889 INFO L255 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-10 18:15:12,890 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:15:13,136 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:15:13,137 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-10 18:15:13,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980605888] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:15:13,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-10 18:15:13,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 17 [2024-11-10 18:15:13,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063206489] [2024-11-10 18:15:13,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:15:13,137 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-10 18:15:13,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:15:13,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-10 18:15:13,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2024-11-10 18:15:13,183 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 76 [2024-11-10 18:15:13,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 183 transitions, 2051 flow. Second operand has 9 states, 9 states have (on average 40.44444444444444) internal successors, (364), 9 states have internal predecessors, (364), 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) [2024-11-10 18:15:13,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:15:13,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 76 [2024-11-10 18:15:13,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:15:13,637 INFO L124 PetriNetUnfolderBase]: 1694/3673 cut-off events. [2024-11-10 18:15:13,637 INFO L125 PetriNetUnfolderBase]: For 31140/31822 co-relation queries the response was YES. [2024-11-10 18:15:13,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15801 conditions, 3673 events. 1694/3673 cut-off events. For 31140/31822 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 26405 event pairs, 410 based on Foata normal form. 51/3647 useless extension candidates. Maximal degree in co-relation 15728. Up to 1852 conditions per place. [2024-11-10 18:15:13,671 INFO L140 encePairwiseOnDemand]: 64/76 looper letters, 168 selfloop transitions, 44 changer transitions 16/253 dead transitions. [2024-11-10 18:15:13,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 253 transitions, 3242 flow [2024-11-10 18:15:13,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-10 18:15:13,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-10 18:15:13,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 459 transitions. [2024-11-10 18:15:13,673 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6039473684210527 [2024-11-10 18:15:13,673 INFO L175 Difference]: Start difference. First operand has 172 places, 183 transitions, 2051 flow. Second operand 10 states and 459 transitions. [2024-11-10 18:15:13,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 253 transitions, 3242 flow [2024-11-10 18:15:13,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 253 transitions, 3205 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-11-10 18:15:13,708 INFO L231 Difference]: Finished difference. Result has 179 places, 187 transitions, 2166 flow [2024-11-10 18:15:13,709 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=2018, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2166, PETRI_PLACES=179, PETRI_TRANSITIONS=187} [2024-11-10 18:15:13,709 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 111 predicate places. [2024-11-10 18:15:13,709 INFO L471 AbstractCegarLoop]: Abstraction has has 179 places, 187 transitions, 2166 flow [2024-11-10 18:15:13,710 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 40.44444444444444) internal successors, (364), 9 states have internal predecessors, (364), 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) [2024-11-10 18:15:13,710 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:15:13,710 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] [2024-11-10 18:15:13,723 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-10 18:15:13,913 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-10 18:15:13,913 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-10 18:15:13,914 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:15:13,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1069419345, now seen corresponding path program 3 times [2024-11-10 18:15:13,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:15:13,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717768993] [2024-11-10 18:15:13,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:15:13,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:15:13,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:15:14,335 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:15:14,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:15:14,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717768993] [2024-11-10 18:15:14,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717768993] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:15:14,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686264725] [2024-11-10 18:15:14,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-10 18:15:14,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:15:14,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:15:14,338 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:15:14,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-10 18:15:14,456 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-10 18:15:14,457 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:15:14,459 INFO L255 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-10 18:15:14,461 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:15:14,773 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:15:14,773 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-10 18:15:14,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686264725] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:15:14,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-10 18:15:14,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 17 [2024-11-10 18:15:14,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203319101] [2024-11-10 18:15:14,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:15:14,774 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-10 18:15:14,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:15:14,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-10 18:15:14,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2024-11-10 18:15:14,829 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 76 [2024-11-10 18:15:14,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 187 transitions, 2166 flow. Second operand has 9 states, 9 states have (on average 40.44444444444444) internal successors, (364), 9 states have internal predecessors, (364), 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) [2024-11-10 18:15:14,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:15:14,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 76 [2024-11-10 18:15:14,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:15:15,570 INFO L124 PetriNetUnfolderBase]: 1654/3597 cut-off events. [2024-11-10 18:15:15,574 INFO L125 PetriNetUnfolderBase]: For 33086/33774 co-relation queries the response was YES. [2024-11-10 18:15:15,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15966 conditions, 3597 events. 1654/3597 cut-off events. For 33086/33774 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 25710 event pairs, 400 based on Foata normal form. 63/3592 useless extension candidates. Maximal degree in co-relation 15891. Up to 1774 conditions per place. [2024-11-10 18:15:15,626 INFO L140 encePairwiseOnDemand]: 64/76 looper letters, 166 selfloop transitions, 43 changer transitions 14/248 dead transitions. [2024-11-10 18:15:15,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 248 transitions, 3194 flow [2024-11-10 18:15:15,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-10 18:15:15,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-10 18:15:15,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 460 transitions. [2024-11-10 18:15:15,628 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6052631578947368 [2024-11-10 18:15:15,632 INFO L175 Difference]: Start difference. First operand has 179 places, 187 transitions, 2166 flow. Second operand 10 states and 460 transitions. [2024-11-10 18:15:15,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 248 transitions, 3194 flow [2024-11-10 18:15:15,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 248 transitions, 3102 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-11-10 18:15:15,779 INFO L231 Difference]: Finished difference. Result has 181 places, 184 transitions, 2116 flow [2024-11-10 18:15:15,779 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=2078, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2116, PETRI_PLACES=181, PETRI_TRANSITIONS=184} [2024-11-10 18:15:15,780 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 113 predicate places. [2024-11-10 18:15:15,780 INFO L471 AbstractCegarLoop]: Abstraction has has 181 places, 184 transitions, 2116 flow [2024-11-10 18:15:15,780 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 40.44444444444444) internal successors, (364), 9 states have internal predecessors, (364), 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) [2024-11-10 18:15:15,781 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:15:15,781 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] [2024-11-10 18:15:15,794 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-10 18:15:15,985 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-10 18:15:15,986 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-10 18:15:15,986 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:15:15,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1480904581, now seen corresponding path program 4 times [2024-11-10 18:15:15,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:15:15,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838791652] [2024-11-10 18:15:15,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:15:15,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:15:16,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:15:16,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:15:16,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:15:16,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838791652] [2024-11-10 18:15:16,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838791652] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:15:16,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229922298] [2024-11-10 18:15:16,179 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-10 18:15:16,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:15:16,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:15:16,183 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:15:16,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-10 18:15:16,250 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-10 18:15:16,250 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:15:16,251 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-10 18:15:16,253 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:15:16,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:15:16,526 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:15:17,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:15:17,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229922298] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-10 18:15:17,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-10 18:15:17,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 26 [2024-11-10 18:15:17,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136156887] [2024-11-10 18:15:17,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:15:17,095 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-10 18:15:17,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:15:17,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-10 18:15:17,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2024-11-10 18:15:17,200 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 76 [2024-11-10 18:15:17,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 184 transitions, 2116 flow. Second operand has 10 states, 10 states have (on average 40.2) internal successors, (402), 10 states have internal predecessors, (402), 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) [2024-11-10 18:15:17,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:15:17,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 76 [2024-11-10 18:15:17,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:15:17,978 INFO L124 PetriNetUnfolderBase]: 1642/3581 cut-off events. [2024-11-10 18:15:17,978 INFO L125 PetriNetUnfolderBase]: For 32706/33378 co-relation queries the response was YES. [2024-11-10 18:15:18,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15771 conditions, 3581 events. 1642/3581 cut-off events. For 32706/33378 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 25566 event pairs, 400 based on Foata normal form. 51/3564 useless extension candidates. Maximal degree in co-relation 15697. Up to 1671 conditions per place. [2024-11-10 18:15:18,012 INFO L140 encePairwiseOnDemand]: 62/76 looper letters, 150 selfloop transitions, 52 changer transitions 26/253 dead transitions. [2024-11-10 18:15:18,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 253 transitions, 3193 flow [2024-11-10 18:15:18,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-10 18:15:18,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-10 18:15:18,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 544 transitions. [2024-11-10 18:15:18,014 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5964912280701754 [2024-11-10 18:15:18,014 INFO L175 Difference]: Start difference. First operand has 181 places, 184 transitions, 2116 flow. Second operand 12 states and 544 transitions. [2024-11-10 18:15:18,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 253 transitions, 3193 flow [2024-11-10 18:15:18,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 253 transitions, 3105 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-11-10 18:15:18,052 INFO L231 Difference]: Finished difference. Result has 185 places, 180 transitions, 2089 flow [2024-11-10 18:15:18,053 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=2030, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2089, PETRI_PLACES=185, PETRI_TRANSITIONS=180} [2024-11-10 18:15:18,053 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 117 predicate places. [2024-11-10 18:15:18,053 INFO L471 AbstractCegarLoop]: Abstraction has has 185 places, 180 transitions, 2089 flow [2024-11-10 18:15:18,054 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 40.2) internal successors, (402), 10 states have internal predecessors, (402), 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) [2024-11-10 18:15:18,054 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:15:18,054 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] [2024-11-10 18:15:18,070 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-10 18:15:18,258 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-10 18:15:18,259 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-10 18:15:18,259 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:15:18,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1705890495, now seen corresponding path program 5 times [2024-11-10 18:15:18,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:15:18,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556327896] [2024-11-10 18:15:18,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:15:18,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:15:18,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:15:18,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:15:18,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:15:18,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556327896] [2024-11-10 18:15:18,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556327896] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:15:18,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263581298] [2024-11-10 18:15:18,435 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-10 18:15:18,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:15:18,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:15:18,437 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:15:18,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-10 18:15:18,504 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 18:15:18,504 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:15:18,505 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-10 18:15:18,506 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:15:18,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:15:18,775 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:15:19,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:15:19,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263581298] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-10 18:15:19,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-10 18:15:19,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 26 [2024-11-10 18:15:19,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456075355] [2024-11-10 18:15:19,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:15:19,330 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-10 18:15:19,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:15:19,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-10 18:15:19,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2024-11-10 18:15:19,439 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 76 [2024-11-10 18:15:19,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 180 transitions, 2089 flow. Second operand has 10 states, 10 states have (on average 40.2) internal successors, (402), 10 states have internal predecessors, (402), 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) [2024-11-10 18:15:19,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:15:19,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 76 [2024-11-10 18:15:19,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:15:20,184 INFO L124 PetriNetUnfolderBase]: 1606/3497 cut-off events. [2024-11-10 18:15:20,185 INFO L125 PetriNetUnfolderBase]: For 32007/32683 co-relation queries the response was YES. [2024-11-10 18:15:20,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15368 conditions, 3497 events. 1606/3497 cut-off events. For 32007/32683 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 24969 event pairs, 386 based on Foata normal form. 51/3474 useless extension candidates. Maximal degree in co-relation 15293. Up to 1671 conditions per place. [2024-11-10 18:15:20,216 INFO L140 encePairwiseOnDemand]: 62/76 looper letters, 141 selfloop transitions, 50 changer transitions 23/239 dead transitions. [2024-11-10 18:15:20,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 239 transitions, 3023 flow [2024-11-10 18:15:20,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-10 18:15:20,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-10 18:15:20,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 538 transitions. [2024-11-10 18:15:20,218 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5899122807017544 [2024-11-10 18:15:20,218 INFO L175 Difference]: Start difference. First operand has 185 places, 180 transitions, 2089 flow. Second operand 12 states and 538 transitions. [2024-11-10 18:15:20,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 239 transitions, 3023 flow [2024-11-10 18:15:20,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 239 transitions, 2916 flow, removed 7 selfloop flow, removed 12 redundant places. [2024-11-10 18:15:20,250 INFO L231 Difference]: Finished difference. Result has 182 places, 173 transitions, 2000 flow [2024-11-10 18:15:20,251 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=1988, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2000, PETRI_PLACES=182, PETRI_TRANSITIONS=173} [2024-11-10 18:15:20,252 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 114 predicate places. [2024-11-10 18:15:20,252 INFO L471 AbstractCegarLoop]: Abstraction has has 182 places, 173 transitions, 2000 flow [2024-11-10 18:15:20,253 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 40.2) internal successors, (402), 10 states have internal predecessors, (402), 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) [2024-11-10 18:15:20,253 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:15:20,253 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] [2024-11-10 18:15:20,267 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-10 18:15:20,457 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-10 18:15:20,458 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-10 18:15:20,459 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:15:20,459 INFO L85 PathProgramCache]: Analyzing trace with hash -906380795, now seen corresponding path program 6 times [2024-11-10 18:15:20,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:15:20,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735716310] [2024-11-10 18:15:20,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:15:20,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:15:20,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:15:20,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:15:20,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:15:20,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735716310] [2024-11-10 18:15:20,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735716310] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:15:20,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078876791] [2024-11-10 18:15:20,617 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-10 18:15:20,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:15:20,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:15:20,623 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:15:20,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-10 18:15:20,689 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-11-10 18:15:20,689 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:15:20,690 INFO L255 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-10 18:15:20,691 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:15:20,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:15:20,915 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-10 18:15:20,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078876791] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:15:20,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-10 18:15:20,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 17 [2024-11-10 18:15:20,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119292748] [2024-11-10 18:15:20,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:15:20,916 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-10 18:15:20,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:15:20,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-10 18:15:20,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2024-11-10 18:15:20,962 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 76 [2024-11-10 18:15:20,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 173 transitions, 2000 flow. Second operand has 9 states, 9 states have (on average 40.44444444444444) internal successors, (364), 9 states have internal predecessors, (364), 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) [2024-11-10 18:15:20,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:15:20,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 76 [2024-11-10 18:15:20,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:15:21,448 INFO L124 PetriNetUnfolderBase]: 1556/3373 cut-off events. [2024-11-10 18:15:21,449 INFO L125 PetriNetUnfolderBase]: For 30829/31493 co-relation queries the response was YES. [2024-11-10 18:15:21,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15194 conditions, 3373 events. 1556/3373 cut-off events. For 30829/31493 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 23886 event pairs, 386 based on Foata normal form. 43/3346 useless extension candidates. Maximal degree in co-relation 15129. Up to 1672 conditions per place. [2024-11-10 18:15:21,473 INFO L140 encePairwiseOnDemand]: 64/76 looper letters, 134 selfloop transitions, 30 changer transitions 28/217 dead transitions. [2024-11-10 18:15:21,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 217 transitions, 2753 flow [2024-11-10 18:15:21,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-10 18:15:21,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-10 18:15:21,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 450 transitions. [2024-11-10 18:15:21,475 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5921052631578947 [2024-11-10 18:15:21,475 INFO L175 Difference]: Start difference. First operand has 182 places, 173 transitions, 2000 flow. Second operand 10 states and 450 transitions. [2024-11-10 18:15:21,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 217 transitions, 2753 flow [2024-11-10 18:15:21,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 217 transitions, 2709 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-11-10 18:15:21,503 INFO L231 Difference]: Finished difference. Result has 179 places, 159 transitions, 1840 flow [2024-11-10 18:15:21,503 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=1956, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1840, PETRI_PLACES=179, PETRI_TRANSITIONS=159} [2024-11-10 18:15:21,504 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 111 predicate places. [2024-11-10 18:15:21,504 INFO L471 AbstractCegarLoop]: Abstraction has has 179 places, 159 transitions, 1840 flow [2024-11-10 18:15:21,504 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 40.44444444444444) internal successors, (364), 9 states have internal predecessors, (364), 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) [2024-11-10 18:15:21,504 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:15:21,504 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] [2024-11-10 18:15:21,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-10 18:15:21,708 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:15:21,709 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-10 18:15:21,709 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:15:21,709 INFO L85 PathProgramCache]: Analyzing trace with hash 395763765, now seen corresponding path program 1 times [2024-11-10 18:15:21,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:15:21,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563485413] [2024-11-10 18:15:21,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:15:21,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:15:21,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:15:22,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:15:22,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:15:22,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563485413] [2024-11-10 18:15:22,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563485413] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:15:22,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863018595] [2024-11-10 18:15:22,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:15:22,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:15:22,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:15:22,022 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:15:22,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-10 18:15:22,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:15:22,105 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-10 18:15:22,107 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:15:22,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:15:22,409 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:15:22,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:15:22,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863018595] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-10 18:15:22,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-10 18:15:22,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11, 9] total 27 [2024-11-10 18:15:22,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702139502] [2024-11-10 18:15:22,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:15:22,919 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-10 18:15:22,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:15:22,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-10 18:15:22,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=608, Unknown=0, NotChecked=0, Total=756 [2024-11-10 18:15:23,032 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 76 [2024-11-10 18:15:23,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 159 transitions, 1840 flow. Second operand has 10 states, 10 states have (on average 40.2) internal successors, (402), 10 states have internal predecessors, (402), 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) [2024-11-10 18:15:23,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:15:23,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 76 [2024-11-10 18:15:23,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:15:23,824 INFO L124 PetriNetUnfolderBase]: 1624/3507 cut-off events. [2024-11-10 18:15:23,824 INFO L125 PetriNetUnfolderBase]: For 34536/35207 co-relation queries the response was YES. [2024-11-10 18:15:23,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16128 conditions, 3507 events. 1624/3507 cut-off events. For 34536/35207 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 25093 event pairs, 354 based on Foata normal form. 43/3476 useless extension candidates. Maximal degree in co-relation 16048. Up to 1490 conditions per place. [2024-11-10 18:15:23,857 INFO L140 encePairwiseOnDemand]: 60/76 looper letters, 164 selfloop transitions, 64 changer transitions 11/264 dead transitions. [2024-11-10 18:15:23,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 264 transitions, 3229 flow [2024-11-10 18:15:23,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-10 18:15:23,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-10 18:15:23,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 646 transitions. [2024-11-10 18:15:23,859 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-11-10 18:15:23,859 INFO L175 Difference]: Start difference. First operand has 179 places, 159 transitions, 1840 flow. Second operand 14 states and 646 transitions. [2024-11-10 18:15:23,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 264 transitions, 3229 flow [2024-11-10 18:15:23,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 264 transitions, 3023 flow, removed 41 selfloop flow, removed 11 redundant places. [2024-11-10 18:15:23,893 INFO L231 Difference]: Finished difference. Result has 173 places, 176 transitions, 2096 flow [2024-11-10 18:15:23,893 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=1692, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2096, PETRI_PLACES=173, PETRI_TRANSITIONS=176} [2024-11-10 18:15:23,893 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 105 predicate places. [2024-11-10 18:15:23,893 INFO L471 AbstractCegarLoop]: Abstraction has has 173 places, 176 transitions, 2096 flow [2024-11-10 18:15:23,894 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 40.2) internal successors, (402), 10 states have internal predecessors, (402), 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) [2024-11-10 18:15:23,894 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:15:23,894 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] [2024-11-10 18:15:23,906 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-10 18:15:24,094 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-10 18:15:24,094 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-10 18:15:24,095 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:15:24,095 INFO L85 PathProgramCache]: Analyzing trace with hash 523448541, now seen corresponding path program 2 times [2024-11-10 18:15:24,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:15:24,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870517394] [2024-11-10 18:15:24,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:15:24,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:15:24,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:15:24,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:15:24,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:15:24,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870517394] [2024-11-10 18:15:24,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870517394] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:15:24,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104174866] [2024-11-10 18:15:24,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 18:15:24,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:15:24,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:15:24,274 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:15:24,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-10 18:15:24,336 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-10 18:15:24,336 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:15:24,337 INFO L255 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-10 18:15:24,338 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:15:24,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:15:24,589 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-10 18:15:24,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104174866] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:15:24,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-10 18:15:24,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 18 [2024-11-10 18:15:24,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270037779] [2024-11-10 18:15:24,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:15:24,590 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-10 18:15:24,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:15:24,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-10 18:15:24,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2024-11-10 18:15:24,629 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 76 [2024-11-10 18:15:24,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 176 transitions, 2096 flow. Second operand has 9 states, 9 states have (on average 40.44444444444444) internal successors, (364), 9 states have internal predecessors, (364), 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) [2024-11-10 18:15:24,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:15:24,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 76 [2024-11-10 18:15:24,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:15:25,062 INFO L124 PetriNetUnfolderBase]: 1596/3447 cut-off events. [2024-11-10 18:15:25,063 INFO L125 PetriNetUnfolderBase]: For 28679/29247 co-relation queries the response was YES. [2024-11-10 18:15:25,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15842 conditions, 3447 events. 1596/3447 cut-off events. For 28679/29247 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 24614 event pairs, 394 based on Foata normal form. 54/3428 useless extension candidates. Maximal degree in co-relation 15760. Up to 1772 conditions per place. [2024-11-10 18:15:25,090 INFO L140 encePairwiseOnDemand]: 64/76 looper letters, 164 selfloop transitions, 35 changer transitions 13/237 dead transitions. [2024-11-10 18:15:25,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 237 transitions, 3120 flow [2024-11-10 18:15:25,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-10 18:15:25,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-10 18:15:25,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 463 transitions. [2024-11-10 18:15:25,091 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6092105263157894 [2024-11-10 18:15:25,091 INFO L175 Difference]: Start difference. First operand has 173 places, 176 transitions, 2096 flow. Second operand 10 states and 463 transitions. [2024-11-10 18:15:25,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 237 transitions, 3120 flow [2024-11-10 18:15:25,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 237 transitions, 3005 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-11-10 18:15:25,119 INFO L231 Difference]: Finished difference. Result has 179 places, 178 transitions, 2111 flow [2024-11-10 18:15:25,119 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=1987, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2111, PETRI_PLACES=179, PETRI_TRANSITIONS=178} [2024-11-10 18:15:25,120 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 111 predicate places. [2024-11-10 18:15:25,120 INFO L471 AbstractCegarLoop]: Abstraction has has 179 places, 178 transitions, 2111 flow [2024-11-10 18:15:25,120 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 40.44444444444444) internal successors, (364), 9 states have internal predecessors, (364), 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) [2024-11-10 18:15:25,120 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:15:25,120 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] [2024-11-10 18:15:25,135 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-10 18:15:25,321 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-10 18:15:25,322 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-10 18:15:25,322 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:15:25,322 INFO L85 PathProgramCache]: Analyzing trace with hash -197660189, now seen corresponding path program 3 times [2024-11-10 18:15:25,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:15:25,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560134259] [2024-11-10 18:15:25,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:15:25,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:15:25,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:15:25,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:15:25,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:15:25,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560134259] [2024-11-10 18:15:25,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560134259] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:15:25,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416890135] [2024-11-10 18:15:25,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-10 18:15:25,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:15:25,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:15:25,495 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:15:25,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-10 18:15:25,560 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-10 18:15:25,561 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:15:25,562 INFO L255 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-10 18:15:25,563 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:15:25,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:15:25,796 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-10 18:15:25,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416890135] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:15:25,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-10 18:15:25,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 18 [2024-11-10 18:15:25,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647630452] [2024-11-10 18:15:25,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:15:25,797 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-10 18:15:25,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:15:25,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-10 18:15:25,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2024-11-10 18:15:25,843 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 76 [2024-11-10 18:15:25,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 178 transitions, 2111 flow. Second operand has 9 states, 9 states have (on average 40.44444444444444) internal successors, (364), 9 states have internal predecessors, (364), 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) [2024-11-10 18:15:25,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:15:25,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 76 [2024-11-10 18:15:25,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:15:26,290 INFO L124 PetriNetUnfolderBase]: 1558/3365 cut-off events. [2024-11-10 18:15:26,290 INFO L125 PetriNetUnfolderBase]: For 25902/26466 co-relation queries the response was YES. [2024-11-10 18:15:26,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15975 conditions, 3365 events. 1558/3365 cut-off events. For 25902/26466 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 23846 event pairs, 376 based on Foata normal form. 55/3352 useless extension candidates. Maximal degree in co-relation 15770. Up to 1698 conditions per place. [2024-11-10 18:15:26,318 INFO L140 encePairwiseOnDemand]: 64/76 looper letters, 155 selfloop transitions, 32 changer transitions 22/234 dead transitions. [2024-11-10 18:15:26,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 234 transitions, 3049 flow [2024-11-10 18:15:26,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-10 18:15:26,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-10 18:15:26,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 464 transitions. [2024-11-10 18:15:26,319 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6105263157894737 [2024-11-10 18:15:26,319 INFO L175 Difference]: Start difference. First operand has 179 places, 178 transitions, 2111 flow. Second operand 10 states and 464 transitions. [2024-11-10 18:15:26,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 234 transitions, 3049 flow [2024-11-10 18:15:26,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 234 transitions, 2957 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-11-10 18:15:26,348 INFO L231 Difference]: Finished difference. Result has 180 places, 173 transitions, 2024 flow [2024-11-10 18:15:26,349 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=2019, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2024, PETRI_PLACES=180, PETRI_TRANSITIONS=173} [2024-11-10 18:15:26,350 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 112 predicate places. [2024-11-10 18:15:26,350 INFO L471 AbstractCegarLoop]: Abstraction has has 180 places, 173 transitions, 2024 flow [2024-11-10 18:15:26,350 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 40.44444444444444) internal successors, (364), 9 states have internal predecessors, (364), 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) [2024-11-10 18:15:26,350 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:15:26,350 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] [2024-11-10 18:15:26,363 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-10 18:15:26,551 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:15:26,552 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-10 18:15:26,553 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:15:26,553 INFO L85 PathProgramCache]: Analyzing trace with hash -14990683, now seen corresponding path program 4 times [2024-11-10 18:15:26,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:15:26,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554805958] [2024-11-10 18:15:26,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:15:26,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:15:26,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:15:26,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:15:26,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:15:26,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554805958] [2024-11-10 18:15:26,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554805958] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:15:26,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2651588] [2024-11-10 18:15:26,724 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-10 18:15:26,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:15:26,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:15:26,726 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:15:26,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-10 18:15:26,789 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-10 18:15:26,789 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:15:26,790 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-10 18:15:26,791 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:15:27,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:15:27,027 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:15:27,326 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:15:27,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2651588] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-10 18:15:27,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-10 18:15:27,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10, 10] total 28 [2024-11-10 18:15:27,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637641993] [2024-11-10 18:15:27,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:15:27,327 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-10 18:15:27,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:15:27,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-10 18:15:27,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2024-11-10 18:15:27,459 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 76 [2024-11-10 18:15:27,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 173 transitions, 2024 flow. Second operand has 10 states, 10 states have (on average 38.3) internal successors, (383), 10 states have internal predecessors, (383), 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) [2024-11-10 18:15:27,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:15:27,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 76 [2024-11-10 18:15:27,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:15:28,443 INFO L124 PetriNetUnfolderBase]: 2585/5343 cut-off events. [2024-11-10 18:15:28,444 INFO L125 PetriNetUnfolderBase]: For 35198/35823 co-relation queries the response was YES. [2024-11-10 18:15:28,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23700 conditions, 5343 events. 2585/5343 cut-off events. For 35198/35823 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 40173 event pairs, 230 based on Foata normal form. 27/5282 useless extension candidates. Maximal degree in co-relation 23200. Up to 1077 conditions per place. [2024-11-10 18:15:28,492 INFO L140 encePairwiseOnDemand]: 62/76 looper letters, 232 selfloop transitions, 108 changer transitions 24/387 dead transitions. [2024-11-10 18:15:28,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 387 transitions, 5117 flow [2024-11-10 18:15:28,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-10 18:15:28,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-10 18:15:28,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 672 transitions. [2024-11-10 18:15:28,494 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5894736842105263 [2024-11-10 18:15:28,494 INFO L175 Difference]: Start difference. First operand has 180 places, 173 transitions, 2024 flow. Second operand 15 states and 672 transitions. [2024-11-10 18:15:28,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 387 transitions, 5117 flow [2024-11-10 18:15:28,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 387 transitions, 4933 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-11-10 18:15:28,535 INFO L231 Difference]: Finished difference. Result has 189 places, 219 transitions, 3018 flow [2024-11-10 18:15:28,535 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=1933, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3018, PETRI_PLACES=189, PETRI_TRANSITIONS=219} [2024-11-10 18:15:28,536 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 121 predicate places. [2024-11-10 18:15:28,536 INFO L471 AbstractCegarLoop]: Abstraction has has 189 places, 219 transitions, 3018 flow [2024-11-10 18:15:28,536 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 38.3) internal successors, (383), 10 states have internal predecessors, (383), 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) [2024-11-10 18:15:28,536 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:15:28,536 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] [2024-11-10 18:15:28,549 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-10 18:15:28,740 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:15:28,741 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-10 18:15:28,741 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:15:28,741 INFO L85 PathProgramCache]: Analyzing trace with hash 960938603, now seen corresponding path program 5 times [2024-11-10 18:15:28,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:15:28,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826431413] [2024-11-10 18:15:28,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:15:28,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:15:28,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:15:28,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:15:28,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:15:28,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826431413] [2024-11-10 18:15:28,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826431413] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:15:28,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370157366] [2024-11-10 18:15:28,922 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-10 18:15:28,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:15:28,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:15:28,924 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:15:28,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-10 18:15:28,989 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 18:15:28,989 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:15:28,990 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-10 18:15:28,991 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:15:29,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:15:29,263 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:15:29,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:15:29,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370157366] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-10 18:15:29,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-10 18:15:29,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11, 9] total 27 [2024-11-10 18:15:29,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549929592] [2024-11-10 18:15:29,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:15:29,865 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-10 18:15:29,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:15:29,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-10 18:15:29,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=608, Unknown=0, NotChecked=0, Total=756 [2024-11-10 18:15:29,962 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 76 [2024-11-10 18:15:29,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 219 transitions, 3018 flow. Second operand has 10 states, 10 states have (on average 40.2) internal successors, (402), 10 states have internal predecessors, (402), 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) [2024-11-10 18:15:29,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:15:29,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 76 [2024-11-10 18:15:29,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:15:30,898 INFO L124 PetriNetUnfolderBase]: 2054/4490 cut-off events. [2024-11-10 18:15:30,898 INFO L125 PetriNetUnfolderBase]: For 41068/41913 co-relation queries the response was YES. [2024-11-10 18:15:30,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21347 conditions, 4490 events. 2054/4490 cut-off events. For 41068/41913 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 34695 event pairs, 472 based on Foata normal form. 47/4452 useless extension candidates. Maximal degree in co-relation 21243. Up to 2547 conditions per place. [2024-11-10 18:15:30,932 INFO L140 encePairwiseOnDemand]: 60/76 looper letters, 124 selfloop transitions, 81 changer transitions 27/261 dead transitions. [2024-11-10 18:15:30,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 261 transitions, 3761 flow [2024-11-10 18:15:30,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-10 18:15:30,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-10 18:15:30,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 581 transitions. [2024-11-10 18:15:30,933 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5880566801619433 [2024-11-10 18:15:30,933 INFO L175 Difference]: Start difference. First operand has 189 places, 219 transitions, 3018 flow. Second operand 13 states and 581 transitions. [2024-11-10 18:15:30,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 261 transitions, 3761 flow [2024-11-10 18:15:30,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 261 transitions, 3661 flow, removed 22 selfloop flow, removed 11 redundant places. [2024-11-10 18:15:30,991 INFO L231 Difference]: Finished difference. Result has 190 places, 206 transitions, 2872 flow [2024-11-10 18:15:30,991 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=2928, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2872, PETRI_PLACES=190, PETRI_TRANSITIONS=206} [2024-11-10 18:15:30,991 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 122 predicate places. [2024-11-10 18:15:30,992 INFO L471 AbstractCegarLoop]: Abstraction has has 190 places, 206 transitions, 2872 flow [2024-11-10 18:15:30,992 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 40.2) internal successors, (402), 10 states have internal predecessors, (402), 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) [2024-11-10 18:15:30,992 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:15:30,992 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] [2024-11-10 18:15:31,006 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-10 18:15:31,192 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:15:31,193 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-10 18:15:31,193 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:15:31,193 INFO L85 PathProgramCache]: Analyzing trace with hash -2029131483, now seen corresponding path program 6 times [2024-11-10 18:15:31,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:15:31,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698139627] [2024-11-10 18:15:31,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:15:31,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:15:31,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:15:31,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:15:31,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:15:31,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698139627] [2024-11-10 18:15:31,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698139627] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:15:31,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317012338] [2024-11-10 18:15:31,362 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-10 18:15:31,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:15:31,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:15:31,364 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:15:31,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-10 18:15:31,428 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-11-10 18:15:31,428 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:15:31,429 INFO L255 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-10 18:15:31,430 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:15:31,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:15:31,646 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-10 18:15:31,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317012338] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:15:31,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-10 18:15:31,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 18 [2024-11-10 18:15:31,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203927642] [2024-11-10 18:15:31,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:15:31,647 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-10 18:15:31,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:15:31,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-10 18:15:31,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2024-11-10 18:15:31,693 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 76 [2024-11-10 18:15:31,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 206 transitions, 2872 flow. Second operand has 9 states, 9 states have (on average 40.44444444444444) internal successors, (364), 9 states have internal predecessors, (364), 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) [2024-11-10 18:15:31,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:15:31,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 76 [2024-11-10 18:15:31,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:15:32,356 INFO L124 PetriNetUnfolderBase]: 1996/4342 cut-off events. [2024-11-10 18:15:32,357 INFO L125 PetriNetUnfolderBase]: For 40759/41580 co-relation queries the response was YES. [2024-11-10 18:15:32,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20575 conditions, 4342 events. 1996/4342 cut-off events. For 40759/41580 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 33492 event pairs, 472 based on Foata normal form. 35/4293 useless extension candidates. Maximal degree in co-relation 20483. Up to 2547 conditions per place. [2024-11-10 18:15:32,400 INFO L140 encePairwiseOnDemand]: 64/76 looper letters, 122 selfloop transitions, 48 changer transitions 35/234 dead transitions. [2024-11-10 18:15:32,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 234 transitions, 3445 flow [2024-11-10 18:15:32,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-10 18:15:32,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-10 18:15:32,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 455 transitions. [2024-11-10 18:15:32,406 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5986842105263158 [2024-11-10 18:15:32,406 INFO L175 Difference]: Start difference. First operand has 190 places, 206 transitions, 2872 flow. Second operand 10 states and 455 transitions. [2024-11-10 18:15:32,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 234 transitions, 3445 flow [2024-11-10 18:15:32,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 234 transitions, 3263 flow, removed 9 selfloop flow, removed 11 redundant places. [2024-11-10 18:15:32,476 INFO L231 Difference]: Finished difference. Result has 185 places, 184 transitions, 2579 flow [2024-11-10 18:15:32,476 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=2690, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2579, PETRI_PLACES=185, PETRI_TRANSITIONS=184} [2024-11-10 18:15:32,478 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 117 predicate places. [2024-11-10 18:15:32,478 INFO L471 AbstractCegarLoop]: Abstraction has has 185 places, 184 transitions, 2579 flow [2024-11-10 18:15:32,479 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 40.44444444444444) internal successors, (364), 9 states have internal predecessors, (364), 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) [2024-11-10 18:15:32,479 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:15:32,479 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:15:32,495 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-10 18:15:32,681 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-11-10 18:15:32,682 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-10 18:15:32,682 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:15:32,682 INFO L85 PathProgramCache]: Analyzing trace with hash -554112832, now seen corresponding path program 1 times [2024-11-10 18:15:32,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:15:32,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942788261] [2024-11-10 18:15:32,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:15:32,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:15:32,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:15:33,036 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-10 18:15:33,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:15:33,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942788261] [2024-11-10 18:15:33,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942788261] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:15:33,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254667268] [2024-11-10 18:15:33,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:15:33,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:15:33,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:15:33,039 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:15:33,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-10 18:15:33,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:15:33,111 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-10 18:15:33,112 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:15:33,223 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-10 18:15:33,224 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:15:33,310 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-10 18:15:33,349 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-10 18:15:33,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254667268] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:15:33,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:15:33,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 20 [2024-11-10 18:15:33,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199846703] [2024-11-10 18:15:33,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:15:33,349 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-10 18:15:33,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:15:33,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-10 18:15:33,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2024-11-10 18:15:33,961 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 76 [2024-11-10 18:15:33,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 184 transitions, 2579 flow. Second operand has 21 states, 21 states have (on average 38.904761904761905) internal successors, (817), 21 states have internal predecessors, (817), 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) [2024-11-10 18:15:33,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:15:33,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 76 [2024-11-10 18:15:33,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:15:34,796 INFO L124 PetriNetUnfolderBase]: 2176/4747 cut-off events. [2024-11-10 18:15:34,796 INFO L125 PetriNetUnfolderBase]: For 39024/39462 co-relation queries the response was YES. [2024-11-10 18:15:34,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22267 conditions, 4747 events. 2176/4747 cut-off events. For 39024/39462 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 36615 event pairs, 904 based on Foata normal form. 52/4653 useless extension candidates. Maximal degree in co-relation 22120. Up to 1264 conditions per place. [2024-11-10 18:15:34,834 INFO L140 encePairwiseOnDemand]: 66/76 looper letters, 217 selfloop transitions, 47 changer transitions 0/295 dead transitions. [2024-11-10 18:15:34,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 295 transitions, 4255 flow [2024-11-10 18:15:34,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-10 18:15:34,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-10 18:15:34,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 485 transitions. [2024-11-10 18:15:34,835 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6381578947368421 [2024-11-10 18:15:34,835 INFO L175 Difference]: Start difference. First operand has 185 places, 184 transitions, 2579 flow. Second operand 10 states and 485 transitions. [2024-11-10 18:15:34,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 295 transitions, 4255 flow [2024-11-10 18:15:34,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 295 transitions, 3704 flow, removed 69 selfloop flow, removed 17 redundant places. [2024-11-10 18:15:34,906 INFO L231 Difference]: Finished difference. Result has 163 places, 186 transitions, 2345 flow [2024-11-10 18:15:34,906 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=2190, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2345, PETRI_PLACES=163, PETRI_TRANSITIONS=186} [2024-11-10 18:15:34,907 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 95 predicate places. [2024-11-10 18:15:34,907 INFO L471 AbstractCegarLoop]: Abstraction has has 163 places, 186 transitions, 2345 flow [2024-11-10 18:15:34,907 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 38.904761904761905) internal successors, (817), 21 states have internal predecessors, (817), 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) [2024-11-10 18:15:34,907 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:15:34,907 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:15:34,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-10 18:15:35,108 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-11-10 18:15:35,109 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting thread2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-10 18:15:35,109 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:15:35,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1551429627, now seen corresponding path program 2 times [2024-11-10 18:15:35,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:15:35,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554524596] [2024-11-10 18:15:35,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:15:35,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:15:35,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:15:35,272 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-10 18:15:35,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:15:35,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554524596] [2024-11-10 18:15:35,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554524596] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:15:35,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643129164] [2024-11-10 18:15:35,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 18:15:35,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:15:35,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:15:35,275 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:15:35,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-10 18:15:35,344 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 18:15:35,345 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:15:35,346 INFO L255 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-10 18:15:35,347 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:15:35,458 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-10 18:15:35,458 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:15:35,546 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-10 18:15:35,584 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-10 18:15:35,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643129164] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:15:35,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:15:35,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 20 [2024-11-10 18:15:35,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709367625] [2024-11-10 18:15:35,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:15:35,585 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-10 18:15:35,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:15:35,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-10 18:15:35,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2024-11-10 18:15:36,308 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 76 [2024-11-10 18:15:36,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 186 transitions, 2345 flow. Second operand has 21 states, 21 states have (on average 38.19047619047619) internal successors, (802), 21 states have internal predecessors, (802), 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) [2024-11-10 18:15:36,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:15:36,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 76 [2024-11-10 18:15:36,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:15:37,240 INFO L124 PetriNetUnfolderBase]: 2920/6087 cut-off events. [2024-11-10 18:15:37,240 INFO L125 PetriNetUnfolderBase]: For 48281/49108 co-relation queries the response was YES. [2024-11-10 18:15:37,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26073 conditions, 6087 events. 2920/6087 cut-off events. For 48281/49108 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 46741 event pairs, 795 based on Foata normal form. 90/6081 useless extension candidates. Maximal degree in co-relation 23348. Up to 1233 conditions per place. [2024-11-10 18:15:37,294 INFO L140 encePairwiseOnDemand]: 66/76 looper letters, 270 selfloop transitions, 49 changer transitions 0/351 dead transitions. [2024-11-10 18:15:37,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 351 transitions, 5020 flow [2024-11-10 18:15:37,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-10 18:15:37,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-10 18:15:37,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 475 transitions. [2024-11-10 18:15:37,295 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-11-10 18:15:37,295 INFO L175 Difference]: Start difference. First operand has 163 places, 186 transitions, 2345 flow. Second operand 10 states and 475 transitions. [2024-11-10 18:15:37,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 351 transitions, 5020 flow [2024-11-10 18:15:37,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 351 transitions, 4982 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-11-10 18:15:37,346 INFO L231 Difference]: Finished difference. Result has 172 places, 197 transitions, 2624 flow [2024-11-10 18:15:37,346 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=2318, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2624, PETRI_PLACES=172, PETRI_TRANSITIONS=197} [2024-11-10 18:15:37,346 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 104 predicate places. [2024-11-10 18:15:37,346 INFO L471 AbstractCegarLoop]: Abstraction has has 172 places, 197 transitions, 2624 flow [2024-11-10 18:15:37,347 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 38.19047619047619) internal successors, (802), 21 states have internal predecessors, (802), 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) [2024-11-10 18:15:37,347 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:15:37,347 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:15:37,360 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-10 18:15:37,551 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:15:37,552 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-10 18:15:37,552 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:15:37,552 INFO L85 PathProgramCache]: Analyzing trace with hash 849678671, now seen corresponding path program 1 times [2024-11-10 18:15:37,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:15:37,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713299133] [2024-11-10 18:15:37,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:15:37,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:15:37,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:15:37,706 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-10 18:15:37,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:15:37,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713299133] [2024-11-10 18:15:37,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713299133] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:15:37,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849628635] [2024-11-10 18:15:37,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:15:37,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:15:37,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:15:37,709 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:15:37,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-10 18:15:37,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:15:37,790 INFO L255 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-10 18:15:37,791 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:15:37,795 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 6 treesize of output 5 [2024-11-10 18:15:37,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 18:15:37,858 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-10 18:15:37,863 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-10 18:15:37,863 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 11 treesize of output 11 [2024-11-10 18:15:37,951 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-10 18:15:37,952 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:15:38,088 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 52 treesize of output 48 [2024-11-10 18:15:38,176 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-10 18:15:38,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849628635] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:15:38,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:15:38,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2024-11-10 18:15:38,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790493006] [2024-11-10 18:15:38,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:15:38,177 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-10 18:15:38,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:15:38,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-10 18:15:38,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2024-11-10 18:15:42,262 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-10 18:15:46,286 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-10 18:15:50,518 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-10 18:15:54,542 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-10 18:15:58,562 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-10 18:16:02,742 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-10 18:16:07,226 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-10 18:16:11,257 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-10 18:16:11,257 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 76 [2024-11-10 18:16:11,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 197 transitions, 2624 flow. Second operand has 20 states, 20 states have (on average 29.55) internal successors, (591), 20 states have internal predecessors, (591), 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) [2024-11-10 18:16:11,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:16:11,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 76 [2024-11-10 18:16:11,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:16:12,452 INFO L124 PetriNetUnfolderBase]: 2680/5846 cut-off events. [2024-11-10 18:16:12,452 INFO L125 PetriNetUnfolderBase]: For 51567/52234 co-relation queries the response was YES. [2024-11-10 18:16:12,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26199 conditions, 5846 events. 2680/5846 cut-off events. For 51567/52234 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 45955 event pairs, 811 based on Foata normal form. 81/5819 useless extension candidates. Maximal degree in co-relation 24155. Up to 1294 conditions per place. [2024-11-10 18:16:12,502 INFO L140 encePairwiseOnDemand]: 66/76 looper letters, 270 selfloop transitions, 50 changer transitions 0/354 dead transitions. [2024-11-10 18:16:12,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 354 transitions, 5201 flow [2024-11-10 18:16:12,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-10 18:16:12,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-10 18:16:12,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 474 transitions. [2024-11-10 18:16:12,504 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4797570850202429 [2024-11-10 18:16:12,504 INFO L175 Difference]: Start difference. First operand has 172 places, 197 transitions, 2624 flow. Second operand 13 states and 474 transitions. [2024-11-10 18:16:12,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 354 transitions, 5201 flow [2024-11-10 18:16:12,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 354 transitions, 5145 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-10 18:16:12,570 INFO L231 Difference]: Finished difference. Result has 184 places, 200 transitions, 2764 flow [2024-11-10 18:16:12,570 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=2569, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2764, PETRI_PLACES=184, PETRI_TRANSITIONS=200} [2024-11-10 18:16:12,571 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 116 predicate places. [2024-11-10 18:16:12,571 INFO L471 AbstractCegarLoop]: Abstraction has has 184 places, 200 transitions, 2764 flow [2024-11-10 18:16:12,571 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 29.55) internal successors, (591), 20 states have internal predecessors, (591), 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) [2024-11-10 18:16:12,571 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:16:12,571 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] [2024-11-10 18:16:12,584 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-10 18:16:12,772 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:16:12,773 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-10 18:16:12,773 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:16:12,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1687950373, now seen corresponding path program 1 times [2024-11-10 18:16:12,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:16:12,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060612698] [2024-11-10 18:16:12,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:16:12,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:16:12,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:16:12,880 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:16:12,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:16:12,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060612698] [2024-11-10 18:16:12,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060612698] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:16:12,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201372902] [2024-11-10 18:16:12,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:16:12,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:16:12,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:16:12,884 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:16:12,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-10 18:16:12,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:16:12,957 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-10 18:16:12,957 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:16:13,032 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:16:13,032 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:16:13,111 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:16:13,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201372902] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-10 18:16:13,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-10 18:16:13,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9, 6] total 15 [2024-11-10 18:16:13,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674478002] [2024-11-10 18:16:13,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:16:13,112 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-10 18:16:13,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:16:13,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-10 18:16:13,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2024-11-10 18:16:13,151 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 76 [2024-11-10 18:16:13,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 200 transitions, 2764 flow. Second operand has 7 states, 7 states have (on average 39.57142857142857) internal successors, (277), 7 states have internal predecessors, (277), 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) [2024-11-10 18:16:13,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:16:13,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 76 [2024-11-10 18:16:13,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand