./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 3289d67d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/chl-chromosome-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 23ca06a4d1d66eab783b29fc3ce31114eee62eb7d17a2452b84e2d73b8d92cfa --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-17 03:31:57,630 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-17 03:31:57,696 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-17 03:31:57,700 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-17 03:31:57,701 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-17 03:31:57,722 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-17 03:31:57,722 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-17 03:31:57,722 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-17 03:31:57,723 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-17 03:31:57,726 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-17 03:31:57,726 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-17 03:31:57,726 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-17 03:31:57,727 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-17 03:31:57,728 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-17 03:31:57,728 INFO L153 SettingsManager]: * Use SBE=true [2024-11-17 03:31:57,728 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-17 03:31:57,728 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-17 03:31:57,728 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-17 03:31:57,729 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-17 03:31:57,729 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-17 03:31:57,729 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-17 03:31:57,730 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-17 03:31:57,730 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-17 03:31:57,730 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-17 03:31:57,730 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-17 03:31:57,731 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-17 03:31:57,731 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-17 03:31:57,731 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-17 03:31:57,731 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-17 03:31:57,731 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-17 03:31:57,731 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-17 03:31:57,731 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-17 03:31:57,732 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-17 03:31:57,732 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:31:57,732 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-17 03:31:57,732 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-17 03:31:57,732 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-17 03:31:57,732 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-17 03:31:57,732 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-17 03:31:57,732 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-17 03:31:57,733 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-17 03:31:57,734 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-17 03:31:57,734 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 23ca06a4d1d66eab783b29fc3ce31114eee62eb7d17a2452b84e2d73b8d92cfa [2024-11-17 03:31:57,929 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-17 03:31:57,946 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-17 03:31:57,951 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-17 03:31:57,952 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-17 03:31:57,953 INFO L274 PluginConnector]: CDTParser initialized [2024-11-17 03:31:57,954 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c [2024-11-17 03:31:59,167 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-17 03:31:59,340 INFO L384 CDTParser]: Found 1 translation units. [2024-11-17 03:31:59,341 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c [2024-11-17 03:31:59,347 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69142f71f/76ed11f02f064a64b525313f4fd3147b/FLAGb631397e7 [2024-11-17 03:31:59,356 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69142f71f/76ed11f02f064a64b525313f4fd3147b [2024-11-17 03:31:59,358 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-17 03:31:59,360 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-17 03:31:59,361 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-17 03:31:59,361 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-17 03:31:59,365 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-17 03:31:59,365 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:31:59" (1/1) ... [2024-11-17 03:31:59,366 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@355166e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:31:59, skipping insertion in model container [2024-11-17 03:31:59,368 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:31:59" (1/1) ... [2024-11-17 03:31:59,388 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-17 03:31:59,573 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-17 03:31:59,576 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:31:59,585 INFO L200 MainTranslator]: Completed pre-run [2024-11-17 03:31:59,615 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:31:59,628 INFO L204 MainTranslator]: Completed translation [2024-11-17 03:31:59,629 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:31:59 WrapperNode [2024-11-17 03:31:59,629 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-17 03:31:59,630 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-17 03:31:59,630 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-17 03:31:59,630 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-17 03:31:59,635 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:31:59" (1/1) ... [2024-11-17 03:31:59,641 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:31:59" (1/1) ... [2024-11-17 03:31:59,665 INFO L138 Inliner]: procedures = 24, calls = 28, calls flagged for inlining = 16, calls inlined = 20, statements flattened = 189 [2024-11-17 03:31:59,666 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-17 03:31:59,666 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-17 03:31:59,666 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-17 03:31:59,666 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-17 03:31:59,682 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:31:59" (1/1) ... [2024-11-17 03:31:59,682 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:31:59" (1/1) ... [2024-11-17 03:31:59,688 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:31:59" (1/1) ... [2024-11-17 03:31:59,701 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 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]. [2024-11-17 03:31:59,701 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:31:59" (1/1) ... [2024-11-17 03:31:59,701 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:31:59" (1/1) ... [2024-11-17 03:31:59,708 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:31:59" (1/1) ... [2024-11-17 03:31:59,708 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:31:59" (1/1) ... [2024-11-17 03:31:59,709 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:31:59" (1/1) ... [2024-11-17 03:31:59,710 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:31:59" (1/1) ... [2024-11-17 03:31:59,712 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-17 03:31:59,713 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-17 03:31:59,713 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-17 03:31:59,713 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-17 03:31:59,714 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:31:59" (1/1) ... [2024-11-17 03:31:59,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:31:59,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:31:59,742 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-17 03:31:59,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-17 03:31:59,776 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-17 03:31:59,777 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-17 03:31:59,777 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-17 03:31:59,777 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-17 03:31:59,777 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-17 03:31:59,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-17 03:31:59,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-17 03:31:59,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-17 03:31:59,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-17 03:31:59,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-17 03:31:59,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-17 03:31:59,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-17 03:31:59,779 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-17 03:31:59,779 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-17 03:31:59,780 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-17 03:31:59,865 INFO L256 CfgBuilder]: Building ICFG [2024-11-17 03:31:59,866 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-17 03:32:00,126 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-17 03:32:00,127 INFO L307 CfgBuilder]: Performing block encoding [2024-11-17 03:32:00,328 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-17 03:32:00,329 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-17 03:32:00,329 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:32:00 BoogieIcfgContainer [2024-11-17 03:32:00,329 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-17 03:32:00,330 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-17 03:32:00,330 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-17 03:32:00,334 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-17 03:32:00,335 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:31:59" (1/3) ... [2024-11-17 03:32:00,336 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f631d13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:32:00, skipping insertion in model container [2024-11-17 03:32:00,336 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:31:59" (2/3) ... [2024-11-17 03:32:00,336 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f631d13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:32:00, skipping insertion in model container [2024-11-17 03:32:00,336 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:32:00" (3/3) ... [2024-11-17 03:32:00,337 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-symm.wvr.c [2024-11-17 03:32:00,351 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-17 03:32:00,352 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2024-11-17 03:32:00,352 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-17 03:32:00,404 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-17 03:32:00,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 54 transitions, 122 flow [2024-11-17 03:32:00,460 INFO L124 PetriNetUnfolderBase]: 8/52 cut-off events. [2024-11-17 03:32:00,460 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-17 03:32:00,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 52 events. 8/52 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 103 event pairs, 0 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 33. Up to 2 conditions per place. [2024-11-17 03:32:00,462 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 54 transitions, 122 flow [2024-11-17 03:32:00,467 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 51 transitions, 114 flow [2024-11-17 03:32:00,478 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-17 03:32:00,484 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;@50976529, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-17 03:32:00,484 INFO L334 AbstractCegarLoop]: Starting to check reachability of 24 error locations. [2024-11-17 03:32:00,487 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-17 03:32:00,487 INFO L124 PetriNetUnfolderBase]: 2/7 cut-off events. [2024-11-17 03:32:00,487 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-17 03:32:00,488 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:32:00,488 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:32:00,488 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-17 03:32:00,492 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:32:00,493 INFO L85 PathProgramCache]: Analyzing trace with hash 17598664, now seen corresponding path program 1 times [2024-11-17 03:32:00,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:32:00,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386862046] [2024-11-17 03:32:00,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:00,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:32:00,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:00,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:32:00,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:32:00,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386862046] [2024-11-17 03:32:00,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386862046] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:32:00,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:32:00,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-17 03:32:00,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55707518] [2024-11-17 03:32:00,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:32:00,730 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:32:00,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:32:00,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:32:00,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:32:00,788 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 54 [2024-11-17 03:32:00,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 51 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:00,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:32:00,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 54 [2024-11-17 03:32:00,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:32:00,859 INFO L124 PetriNetUnfolderBase]: 39/144 cut-off events. [2024-11-17 03:32:00,859 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-11-17 03:32:00,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 233 conditions, 144 events. 39/144 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 587 event pairs, 22 based on Foata normal form. 18/121 useless extension candidates. Maximal degree in co-relation 184. Up to 68 conditions per place. [2024-11-17 03:32:00,862 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 18 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2024-11-17 03:32:00,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 43 transitions, 138 flow [2024-11-17 03:32:00,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:32:00,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:32:00,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 105 transitions. [2024-11-17 03:32:00,873 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6481481481481481 [2024-11-17 03:32:00,875 INFO L175 Difference]: Start difference. First operand has 50 places, 51 transitions, 114 flow. Second operand 3 states and 105 transitions. [2024-11-17 03:32:00,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 43 transitions, 138 flow [2024-11-17 03:32:00,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 43 transitions, 130 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-17 03:32:00,880 INFO L231 Difference]: Finished difference. Result has 44 places, 43 transitions, 94 flow [2024-11-17 03:32:00,883 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=44, PETRI_TRANSITIONS=43} [2024-11-17 03:32:00,886 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, -6 predicate places. [2024-11-17 03:32:00,886 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 43 transitions, 94 flow [2024-11-17 03:32:00,886 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:00,887 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:32:00,887 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:32:00,887 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-17 03:32:00,887 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-17 03:32:00,888 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:32:00,888 INFO L85 PathProgramCache]: Analyzing trace with hash 17598665, now seen corresponding path program 1 times [2024-11-17 03:32:00,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:32:00,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806135581] [2024-11-17 03:32:00,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:00,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:32:00,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:01,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:32:01,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:32:01,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806135581] [2024-11-17 03:32:01,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806135581] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:32:01,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:32:01,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:32:01,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827602001] [2024-11-17 03:32:01,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:32:01,070 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:32:01,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:32:01,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:32:01,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:32:01,113 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 54 [2024-11-17 03:32:01,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 43 transitions, 94 flow. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:01,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:32:01,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 54 [2024-11-17 03:32:01,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:32:01,194 INFO L124 PetriNetUnfolderBase]: 39/150 cut-off events. [2024-11-17 03:32:01,194 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-17 03:32:01,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 240 conditions, 150 events. 39/150 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 583 event pairs, 22 based on Foata normal form. 0/105 useless extension candidates. Maximal degree in co-relation 201. Up to 78 conditions per place. [2024-11-17 03:32:01,197 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 24 selfloop transitions, 4 changer transitions 0/47 dead transitions. [2024-11-17 03:32:01,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 47 transitions, 158 flow [2024-11-17 03:32:01,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:32:01,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:32:01,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 104 transitions. [2024-11-17 03:32:01,199 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6419753086419753 [2024-11-17 03:32:01,200 INFO L175 Difference]: Start difference. First operand has 44 places, 43 transitions, 94 flow. Second operand 3 states and 104 transitions. [2024-11-17 03:32:01,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 47 transitions, 158 flow [2024-11-17 03:32:01,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 47 transitions, 154 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:32:01,202 INFO L231 Difference]: Finished difference. Result has 45 places, 45 transitions, 118 flow [2024-11-17 03:32:01,203 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=45, PETRI_TRANSITIONS=45} [2024-11-17 03:32:01,203 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, -5 predicate places. [2024-11-17 03:32:01,203 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 45 transitions, 118 flow [2024-11-17 03:32:01,204 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:01,204 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:32:01,204 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-11-17 03:32:01,204 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-17 03:32:01,204 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-17 03:32:01,205 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:32:01,205 INFO L85 PathProgramCache]: Analyzing trace with hash 296377116, now seen corresponding path program 1 times [2024-11-17 03:32:01,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:32:01,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994083073] [2024-11-17 03:32:01,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:01,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:32:01,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:01,409 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:32:01,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:32:01,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994083073] [2024-11-17 03:32:01,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994083073] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:32:01,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120561002] [2024-11-17 03:32:01,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:01,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:32:01,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:32:01,413 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:32:01,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-17 03:32:01,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:01,469 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-17 03:32:01,472 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:32:01,524 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 [2024-11-17 03:32:01,580 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:32:01,580 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:32:01,655 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:32:01,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120561002] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:32:01,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:32:01,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-11-17 03:32:01,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513197448] [2024-11-17 03:32:01,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:32:01,656 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-17 03:32:01,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:32:01,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-17 03:32:01,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-11-17 03:32:01,803 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 54 [2024-11-17 03:32:01,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 45 transitions, 118 flow. Second operand has 9 states, 9 states have (on average 25.666666666666668) internal successors, (231), 9 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:01,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:32:01,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 54 [2024-11-17 03:32:01,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:32:01,980 INFO L124 PetriNetUnfolderBase]: 45/180 cut-off events. [2024-11-17 03:32:01,980 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-11-17 03:32:01,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 320 conditions, 180 events. 45/180 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 718 event pairs, 22 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 248. Up to 81 conditions per place. [2024-11-17 03:32:01,982 INFO L140 encePairwiseOnDemand]: 47/54 looper letters, 36 selfloop transitions, 16 changer transitions 0/71 dead transitions. [2024-11-17 03:32:01,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 71 transitions, 307 flow [2024-11-17 03:32:01,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 03:32:01,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 03:32:01,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 202 transitions. [2024-11-17 03:32:01,985 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6234567901234568 [2024-11-17 03:32:01,985 INFO L175 Difference]: Start difference. First operand has 45 places, 45 transitions, 118 flow. Second operand 6 states and 202 transitions. [2024-11-17 03:32:01,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 71 transitions, 307 flow [2024-11-17 03:32:01,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 71 transitions, 300 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 03:32:01,987 INFO L231 Difference]: Finished difference. Result has 52 places, 57 transitions, 224 flow [2024-11-17 03:32:01,987 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=224, PETRI_PLACES=52, PETRI_TRANSITIONS=57} [2024-11-17 03:32:01,989 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 2 predicate places. [2024-11-17 03:32:01,990 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 57 transitions, 224 flow [2024-11-17 03:32:01,990 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 25.666666666666668) internal successors, (231), 9 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:01,990 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:32:01,990 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1] [2024-11-17 03:32:02,004 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-17 03:32:02,191 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:32:02,195 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-17 03:32:02,196 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:32:02,196 INFO L85 PathProgramCache]: Analyzing trace with hash -331045111, now seen corresponding path program 2 times [2024-11-17 03:32:02,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:32:02,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85316968] [2024-11-17 03:32:02,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:02,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:32:02,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:02,451 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:32:02,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:32:02,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85316968] [2024-11-17 03:32:02,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85316968] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:32:02,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892323308] [2024-11-17 03:32:02,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 03:32:02,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:32:02,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:32:02,453 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:32:02,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-17 03:32:02,514 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-17 03:32:02,515 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:32:02,516 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-17 03:32:02,517 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:32:02,525 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 [2024-11-17 03:32:02,681 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:32:02,681 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:32:02,823 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:32:02,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892323308] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:32:02,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:32:02,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2024-11-17 03:32:02,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20422355] [2024-11-17 03:32:02,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:32:02,824 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-17 03:32:02,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:32:02,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-17 03:32:02,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2024-11-17 03:32:03,196 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 54 [2024-11-17 03:32:03,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 57 transitions, 224 flow. Second operand has 18 states, 18 states have (on average 25.833333333333332) internal successors, (465), 18 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:03,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:32:03,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 54 [2024-11-17 03:32:03,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:32:03,479 INFO L124 PetriNetUnfolderBase]: 39/174 cut-off events. [2024-11-17 03:32:03,479 INFO L125 PetriNetUnfolderBase]: For 60/60 co-relation queries the response was YES. [2024-11-17 03:32:03,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 327 conditions, 174 events. 39/174 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 579 event pairs, 22 based on Foata normal form. 10/143 useless extension candidates. Maximal degree in co-relation 237. Up to 78 conditions per place. [2024-11-17 03:32:03,481 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 32 selfloop transitions, 12 changer transitions 0/63 dead transitions. [2024-11-17 03:32:03,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 63 transitions, 308 flow [2024-11-17 03:32:03,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-17 03:32:03,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-17 03:32:03,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 222 transitions. [2024-11-17 03:32:03,484 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-11-17 03:32:03,484 INFO L175 Difference]: Start difference. First operand has 52 places, 57 transitions, 224 flow. Second operand 7 states and 222 transitions. [2024-11-17 03:32:03,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 63 transitions, 308 flow [2024-11-17 03:32:03,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 63 transitions, 290 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-11-17 03:32:03,487 INFO L231 Difference]: Finished difference. Result has 61 places, 53 transitions, 246 flow [2024-11-17 03:32:03,487 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=246, PETRI_PLACES=61, PETRI_TRANSITIONS=53} [2024-11-17 03:32:03,488 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 11 predicate places. [2024-11-17 03:32:03,489 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 53 transitions, 246 flow [2024-11-17 03:32:03,489 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 25.833333333333332) internal successors, (465), 18 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:03,489 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:32:03,489 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 1, 1] [2024-11-17 03:32:03,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-17 03:32:03,693 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,SelfDestructingSolverStorable3 [2024-11-17 03:32:03,694 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-17 03:32:03,694 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:32:03,694 INFO L85 PathProgramCache]: Analyzing trace with hash -919431972, now seen corresponding path program 3 times [2024-11-17 03:32:03,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:32:03,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232113562] [2024-11-17 03:32:03,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:03,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:32:03,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:03,823 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 31 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:32:03,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:32:03,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232113562] [2024-11-17 03:32:03,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232113562] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:32:03,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690589748] [2024-11-17 03:32:03,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-17 03:32:03,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:32:03,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:32:03,827 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:32:03,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-17 03:32:03,879 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-17 03:32:03,880 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:32:03,880 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-17 03:32:03,882 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:32:03,892 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 [2024-11-17 03:32:04,012 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-17 03:32:04,012 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:32:04,129 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-17 03:32:04,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690589748] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:32:04,130 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:32:04,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 3, 3] total 13 [2024-11-17 03:32:04,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850119016] [2024-11-17 03:32:04,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:32:04,130 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-17 03:32:04,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:32:04,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-17 03:32:04,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-11-17 03:32:04,274 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 54 [2024-11-17 03:32:04,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 53 transitions, 246 flow. Second operand has 14 states, 14 states have (on average 25.785714285714285) internal successors, (361), 14 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:04,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:32:04,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 54 [2024-11-17 03:32:04,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:32:04,531 INFO L124 PetriNetUnfolderBase]: 37/168 cut-off events. [2024-11-17 03:32:04,531 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2024-11-17 03:32:04,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 327 conditions, 168 events. 37/168 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 570 event pairs, 22 based on Foata normal form. 2/129 useless extension candidates. Maximal degree in co-relation 238. Up to 68 conditions per place. [2024-11-17 03:32:04,532 INFO L140 encePairwiseOnDemand]: 47/54 looper letters, 19 selfloop transitions, 19 changer transitions 0/57 dead transitions. [2024-11-17 03:32:04,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 57 transitions, 298 flow [2024-11-17 03:32:04,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-17 03:32:04,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-17 03:32:04,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 304 transitions. [2024-11-17 03:32:04,534 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5117845117845118 [2024-11-17 03:32:04,534 INFO L175 Difference]: Start difference. First operand has 61 places, 53 transitions, 246 flow. Second operand 11 states and 304 transitions. [2024-11-17 03:32:04,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 57 transitions, 298 flow [2024-11-17 03:32:04,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 57 transitions, 254 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-11-17 03:32:04,537 INFO L231 Difference]: Finished difference. Result has 60 places, 57 transitions, 224 flow [2024-11-17 03:32:04,538 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=224, PETRI_PLACES=60, PETRI_TRANSITIONS=57} [2024-11-17 03:32:04,538 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 10 predicate places. [2024-11-17 03:32:04,538 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 57 transitions, 224 flow [2024-11-17 03:32:04,538 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 25.785714285714285) internal successors, (361), 14 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:04,538 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:32:04,538 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:32:04,552 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-17 03:32:04,739 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:32:04,743 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-17 03:32:04,743 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:32:04,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1141333162, now seen corresponding path program 1 times [2024-11-17 03:32:04,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:32:04,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985373098] [2024-11-17 03:32:04,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:04,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:32:04,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:04,906 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-17 03:32:04,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:32:04,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985373098] [2024-11-17 03:32:04,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985373098] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:32:04,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:32:04,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-17 03:32:04,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959509028] [2024-11-17 03:32:04,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:32:04,907 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:32:04,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:32:04,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:32:04,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:32:04,937 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 54 [2024-11-17 03:32:04,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 57 transitions, 224 flow. Second operand has 5 states, 5 states have (on average 25.4) internal successors, (127), 5 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:04,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:32:04,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 54 [2024-11-17 03:32:04,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:32:04,988 INFO L124 PetriNetUnfolderBase]: 48/191 cut-off events. [2024-11-17 03:32:04,988 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2024-11-17 03:32:04,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 365 conditions, 191 events. 48/191 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 712 event pairs, 31 based on Foata normal form. 0/155 useless extension candidates. Maximal degree in co-relation 247. Up to 86 conditions per place. [2024-11-17 03:32:04,989 INFO L140 encePairwiseOnDemand]: 49/54 looper letters, 34 selfloop transitions, 3 changer transitions 0/55 dead transitions. [2024-11-17 03:32:04,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 55 transitions, 294 flow [2024-11-17 03:32:04,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:32:04,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:32:04,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 138 transitions. [2024-11-17 03:32:04,990 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5111111111111111 [2024-11-17 03:32:04,990 INFO L175 Difference]: Start difference. First operand has 60 places, 57 transitions, 224 flow. Second operand 5 states and 138 transitions. [2024-11-17 03:32:04,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 55 transitions, 294 flow [2024-11-17 03:32:04,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 55 transitions, 268 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-11-17 03:32:04,992 INFO L231 Difference]: Finished difference. Result has 55 places, 55 transitions, 200 flow [2024-11-17 03:32:04,992 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=200, PETRI_PLACES=55, PETRI_TRANSITIONS=55} [2024-11-17 03:32:04,993 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 5 predicate places. [2024-11-17 03:32:04,993 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 55 transitions, 200 flow [2024-11-17 03:32:04,993 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.4) internal successors, (127), 5 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:04,993 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:32:04,993 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:32:04,993 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-17 03:32:04,993 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-17 03:32:04,994 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:32:04,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1141333163, now seen corresponding path program 1 times [2024-11-17 03:32:04,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:32:04,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133217105] [2024-11-17 03:32:04,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:04,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:32:05,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:05,396 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 18 proven. 22 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-17 03:32:05,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:32:05,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133217105] [2024-11-17 03:32:05,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133217105] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:32:05,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336964773] [2024-11-17 03:32:05,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:05,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:32:05,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:32:05,399 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:32:05,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-17 03:32:05,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:05,496 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-17 03:32:05,498 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:32:05,504 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 [2024-11-17 03:32:05,507 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 [2024-11-17 03:32:05,635 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-17 03:32:05,636 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 [2024-11-17 03:32:05,646 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 14 treesize of output 9 [2024-11-17 03:32:06,015 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 30 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-17 03:32:06,016 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:32:06,420 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-17 03:32:06,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336964773] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-17 03:32:06,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-17 03:32:06,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 8] total 24 [2024-11-17 03:32:06,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094427551] [2024-11-17 03:32:06,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:32:06,422 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-17 03:32:06,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:32:06,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-17 03:32:06,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2024-11-17 03:32:06,653 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 54 [2024-11-17 03:32:06,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 55 transitions, 200 flow. Second operand has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:06,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:32:06,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 54 [2024-11-17 03:32:06,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:32:06,770 INFO L124 PetriNetUnfolderBase]: 84/287 cut-off events. [2024-11-17 03:32:06,770 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-11-17 03:32:06,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 519 conditions, 287 events. 84/287 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1212 event pairs, 29 based on Foata normal form. 0/231 useless extension candidates. Maximal degree in co-relation 411. Up to 78 conditions per place. [2024-11-17 03:32:06,773 INFO L140 encePairwiseOnDemand]: 47/54 looper letters, 43 selfloop transitions, 6 changer transitions 0/66 dead transitions. [2024-11-17 03:32:06,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 66 transitions, 323 flow [2024-11-17 03:32:06,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 03:32:06,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 03:32:06,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 190 transitions. [2024-11-17 03:32:06,774 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5864197530864198 [2024-11-17 03:32:06,774 INFO L175 Difference]: Start difference. First operand has 55 places, 55 transitions, 200 flow. Second operand 6 states and 190 transitions. [2024-11-17 03:32:06,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 66 transitions, 323 flow [2024-11-17 03:32:06,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 66 transitions, 318 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-17 03:32:06,776 INFO L231 Difference]: Finished difference. Result has 59 places, 56 transitions, 220 flow [2024-11-17 03:32:06,776 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=220, PETRI_PLACES=59, PETRI_TRANSITIONS=56} [2024-11-17 03:32:06,777 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 9 predicate places. [2024-11-17 03:32:06,777 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 56 transitions, 220 flow [2024-11-17 03:32:06,777 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:06,777 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:32:06,777 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:32:06,790 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-17 03:32:06,978 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:32:06,978 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-17 03:32:06,979 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:32:06,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1021590202, now seen corresponding path program 1 times [2024-11-17 03:32:06,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:32:06,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570933050] [2024-11-17 03:32:06,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:06,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:32:06,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:07,319 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 18 proven. 22 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-17 03:32:07,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:32:07,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570933050] [2024-11-17 03:32:07,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570933050] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:32:07,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398007606] [2024-11-17 03:32:07,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:07,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:32:07,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:32:07,322 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:32:07,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-17 03:32:07,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:07,415 INFO L255 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-17 03:32:07,417 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:32:07,426 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 [2024-11-17 03:32:07,593 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 30 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-17 03:32:07,593 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:32:07,823 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-17 03:32:07,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398007606] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-17 03:32:07,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-17 03:32:07,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 26 [2024-11-17 03:32:07,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364314631] [2024-11-17 03:32:07,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:32:07,824 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-17 03:32:07,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:32:07,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-17 03:32:07,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2024-11-17 03:32:07,985 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 54 [2024-11-17 03:32:07,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 56 transitions, 220 flow. Second operand has 10 states, 10 states have (on average 28.8) internal successors, (288), 10 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:07,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:32:07,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 54 [2024-11-17 03:32:07,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:32:08,131 INFO L124 PetriNetUnfolderBase]: 73/280 cut-off events. [2024-11-17 03:32:08,131 INFO L125 PetriNetUnfolderBase]: For 74/76 co-relation queries the response was YES. [2024-11-17 03:32:08,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 561 conditions, 280 events. 73/280 cut-off events. For 74/76 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1205 event pairs, 27 based on Foata normal form. 8/241 useless extension candidates. Maximal degree in co-relation 451. Up to 86 conditions per place. [2024-11-17 03:32:08,132 INFO L140 encePairwiseOnDemand]: 49/54 looper letters, 44 selfloop transitions, 4 changer transitions 0/67 dead transitions. [2024-11-17 03:32:08,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 67 transitions, 345 flow [2024-11-17 03:32:08,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:32:08,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:32:08,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 168 transitions. [2024-11-17 03:32:08,134 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6222222222222222 [2024-11-17 03:32:08,134 INFO L175 Difference]: Start difference. First operand has 59 places, 56 transitions, 220 flow. Second operand 5 states and 168 transitions. [2024-11-17 03:32:08,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 67 transitions, 345 flow [2024-11-17 03:32:08,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 67 transitions, 336 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-17 03:32:08,136 INFO L231 Difference]: Finished difference. Result has 60 places, 57 transitions, 231 flow [2024-11-17 03:32:08,137 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=231, PETRI_PLACES=60, PETRI_TRANSITIONS=57} [2024-11-17 03:32:08,138 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 10 predicate places. [2024-11-17 03:32:08,139 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 57 transitions, 231 flow [2024-11-17 03:32:08,139 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 28.8) internal successors, (288), 10 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:08,139 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:32:08,139 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:32:08,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-17 03:32:08,339 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:32:08,340 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-17 03:32:08,340 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:32:08,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1021590201, now seen corresponding path program 1 times [2024-11-17 03:32:08,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:32:08,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208674944] [2024-11-17 03:32:08,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:08,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:32:08,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:08,412 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-17 03:32:08,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:32:08,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208674944] [2024-11-17 03:32:08,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208674944] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:32:08,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:32:08,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-17 03:32:08,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333315449] [2024-11-17 03:32:08,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:32:08,413 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:32:08,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:32:08,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:32:08,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:32:08,428 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 54 [2024-11-17 03:32:08,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 57 transitions, 231 flow. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:08,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:32:08,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 54 [2024-11-17 03:32:08,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:32:08,475 INFO L124 PetriNetUnfolderBase]: 79/250 cut-off events. [2024-11-17 03:32:08,475 INFO L125 PetriNetUnfolderBase]: For 173/181 co-relation queries the response was YES. [2024-11-17 03:32:08,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 573 conditions, 250 events. 79/250 cut-off events. For 173/181 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1006 event pairs, 57 based on Foata normal form. 12/230 useless extension candidates. Maximal degree in co-relation 463. Up to 142 conditions per place. [2024-11-17 03:32:08,477 INFO L140 encePairwiseOnDemand]: 50/54 looper letters, 36 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2024-11-17 03:32:08,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 55 transitions, 303 flow [2024-11-17 03:32:08,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:32:08,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:32:08,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 115 transitions. [2024-11-17 03:32:08,478 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5324074074074074 [2024-11-17 03:32:08,478 INFO L175 Difference]: Start difference. First operand has 60 places, 57 transitions, 231 flow. Second operand 4 states and 115 transitions. [2024-11-17 03:32:08,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 55 transitions, 303 flow [2024-11-17 03:32:08,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 55 transitions, 297 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-17 03:32:08,479 INFO L231 Difference]: Finished difference. Result has 58 places, 55 transitions, 225 flow [2024-11-17 03:32:08,479 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=225, PETRI_PLACES=58, PETRI_TRANSITIONS=55} [2024-11-17 03:32:08,480 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 8 predicate places. [2024-11-17 03:32:08,480 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 55 transitions, 225 flow [2024-11-17 03:32:08,480 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:08,480 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:32:08,480 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:32:08,480 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-17 03:32:08,480 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-17 03:32:08,480 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:32:08,481 INFO L85 PathProgramCache]: Analyzing trace with hash 882577598, now seen corresponding path program 1 times [2024-11-17 03:32:08,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:32:08,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242823401] [2024-11-17 03:32:08,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:08,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:32:08,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:08,789 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 18 proven. 22 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-17 03:32:08,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:32:08,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242823401] [2024-11-17 03:32:08,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242823401] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:32:08,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818957620] [2024-11-17 03:32:08,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:08,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:32:08,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:32:08,792 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:32:08,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-17 03:32:08,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:08,870 INFO L255 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-17 03:32:08,872 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:32:08,878 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 [2024-11-17 03:32:09,015 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 30 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-17 03:32:09,015 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:32:09,234 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-17 03:32:09,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818957620] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-17 03:32:09,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-17 03:32:09,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 26 [2024-11-17 03:32:09,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463244611] [2024-11-17 03:32:09,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:32:09,235 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-17 03:32:09,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:32:09,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-17 03:32:09,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2024-11-17 03:32:09,336 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 54 [2024-11-17 03:32:09,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 55 transitions, 225 flow. Second operand has 10 states, 10 states have (on average 28.0) internal successors, (280), 10 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:09,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:32:09,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 54 [2024-11-17 03:32:09,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:32:09,456 INFO L124 PetriNetUnfolderBase]: 130/371 cut-off events. [2024-11-17 03:32:09,456 INFO L125 PetriNetUnfolderBase]: For 212/232 co-relation queries the response was YES. [2024-11-17 03:32:09,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 823 conditions, 371 events. 130/371 cut-off events. For 212/232 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1693 event pairs, 57 based on Foata normal form. 0/319 useless extension candidates. Maximal degree in co-relation 713. Up to 130 conditions per place. [2024-11-17 03:32:09,457 INFO L140 encePairwiseOnDemand]: 48/54 looper letters, 44 selfloop transitions, 5 changer transitions 0/65 dead transitions. [2024-11-17 03:32:09,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 65 transitions, 360 flow [2024-11-17 03:32:09,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:32:09,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:32:09,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 162 transitions. [2024-11-17 03:32:09,459 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-11-17 03:32:09,459 INFO L175 Difference]: Start difference. First operand has 58 places, 55 transitions, 225 flow. Second operand 5 states and 162 transitions. [2024-11-17 03:32:09,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 65 transitions, 360 flow [2024-11-17 03:32:09,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 65 transitions, 357 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:32:09,460 INFO L231 Difference]: Finished difference. Result has 62 places, 56 transitions, 245 flow [2024-11-17 03:32:09,460 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=245, PETRI_PLACES=62, PETRI_TRANSITIONS=56} [2024-11-17 03:32:09,461 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 12 predicate places. [2024-11-17 03:32:09,461 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 56 transitions, 245 flow [2024-11-17 03:32:09,461 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 28.0) internal successors, (280), 10 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:09,461 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:32:09,461 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:32:09,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-17 03:32:09,665 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:32:09,666 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-17 03:32:09,666 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:32:09,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1590102291, now seen corresponding path program 1 times [2024-11-17 03:32:09,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:32:09,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959748799] [2024-11-17 03:32:09,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:09,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:32:09,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:09,932 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 18 proven. 22 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-17 03:32:09,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:32:09,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959748799] [2024-11-17 03:32:09,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959748799] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:32:09,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276062470] [2024-11-17 03:32:09,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:09,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:32:09,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:32:09,934 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:32:09,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-17 03:32:10,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:10,020 INFO L255 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-17 03:32:10,022 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:32:10,026 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 [2024-11-17 03:32:10,085 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-17 03:32:10,085 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-11-17 03:32:10,365 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-17 03:32:10,366 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:32:10,661 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-17 03:32:10,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276062470] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-17 03:32:10,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-17 03:32:10,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 9] total 25 [2024-11-17 03:32:10,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131982345] [2024-11-17 03:32:10,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:32:10,662 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-17 03:32:10,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:32:10,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-17 03:32:10,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=533, Unknown=0, NotChecked=0, Total=702 [2024-11-17 03:32:10,815 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 54 [2024-11-17 03:32:10,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 56 transitions, 245 flow. Second operand has 10 states, 10 states have (on average 29.0) internal successors, (290), 10 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:10,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:32:10,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 54 [2024-11-17 03:32:10,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:32:10,938 INFO L124 PetriNetUnfolderBase]: 113/362 cut-off events. [2024-11-17 03:32:10,938 INFO L125 PetriNetUnfolderBase]: For 237/253 co-relation queries the response was YES. [2024-11-17 03:32:10,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 886 conditions, 362 events. 113/362 cut-off events. For 237/253 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1705 event pairs, 57 based on Foata normal form. 12/332 useless extension candidates. Maximal degree in co-relation 774. Up to 142 conditions per place. [2024-11-17 03:32:10,939 INFO L140 encePairwiseOnDemand]: 48/54 looper letters, 43 selfloop transitions, 5 changer transitions 0/66 dead transitions. [2024-11-17 03:32:10,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 66 transitions, 382 flow [2024-11-17 03:32:10,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 03:32:10,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 03:32:10,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 193 transitions. [2024-11-17 03:32:10,941 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.595679012345679 [2024-11-17 03:32:10,941 INFO L175 Difference]: Start difference. First operand has 62 places, 56 transitions, 245 flow. Second operand 6 states and 193 transitions. [2024-11-17 03:32:10,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 66 transitions, 382 flow [2024-11-17 03:32:10,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 66 transitions, 375 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-17 03:32:10,942 INFO L231 Difference]: Finished difference. Result has 65 places, 57 transitions, 260 flow [2024-11-17 03:32:10,942 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=260, PETRI_PLACES=65, PETRI_TRANSITIONS=57} [2024-11-17 03:32:10,943 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 15 predicate places. [2024-11-17 03:32:10,943 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 57 transitions, 260 flow [2024-11-17 03:32:10,943 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 29.0) internal successors, (290), 10 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:10,943 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:32:10,943 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:32:10,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-17 03:32:11,147 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:32:11,148 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-17 03:32:11,148 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:32:11,148 INFO L85 PathProgramCache]: Analyzing trace with hash 56044227, now seen corresponding path program 1 times [2024-11-17 03:32:11,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:32:11,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395972608] [2024-11-17 03:32:11,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:11,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:32:11,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:11,464 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 18 proven. 25 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-17 03:32:11,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:32:11,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395972608] [2024-11-17 03:32:11,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395972608] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:32:11,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957100117] [2024-11-17 03:32:11,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:11,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:32:11,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:32:11,466 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:32:11,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-17 03:32:11,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:11,554 INFO L255 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-17 03:32:11,556 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:32:11,565 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 [2024-11-17 03:32:11,568 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 [2024-11-17 03:32:11,646 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-17 03:32:11,648 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-17 03:32:11,664 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-17 03:32:11,664 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 [2024-11-17 03:32:12,026 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 30 proven. 13 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-17 03:32:12,027 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:32:12,402 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 40 proven. 3 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-17 03:32:12,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957100117] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:32:12,402 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:32:12,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 26 [2024-11-17 03:32:12,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786935288] [2024-11-17 03:32:12,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:32:12,402 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-17 03:32:12,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:32:12,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-17 03:32:12,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756 [2024-11-17 03:32:13,018 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 54 [2024-11-17 03:32:13,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 57 transitions, 260 flow. Second operand has 28 states, 28 states have (on average 24.142857142857142) internal successors, (676), 28 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:13,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:32:13,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 54 [2024-11-17 03:32:13,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:32:13,523 INFO L124 PetriNetUnfolderBase]: 298/848 cut-off events. [2024-11-17 03:32:13,523 INFO L125 PetriNetUnfolderBase]: For 894/942 co-relation queries the response was YES. [2024-11-17 03:32:13,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2125 conditions, 848 events. 298/848 cut-off events. For 894/942 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 4952 event pairs, 47 based on Foata normal form. 36/805 useless extension candidates. Maximal degree in co-relation 2011. Up to 120 conditions per place. [2024-11-17 03:32:13,528 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 73 selfloop transitions, 17 changer transitions 0/106 dead transitions. [2024-11-17 03:32:13,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 106 transitions, 637 flow [2024-11-17 03:32:13,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-17 03:32:13,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-17 03:32:13,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 462 transitions. [2024-11-17 03:32:13,530 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5032679738562091 [2024-11-17 03:32:13,530 INFO L175 Difference]: Start difference. First operand has 65 places, 57 transitions, 260 flow. Second operand 17 states and 462 transitions. [2024-11-17 03:32:13,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 106 transitions, 637 flow [2024-11-17 03:32:13,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 106 transitions, 621 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-17 03:32:13,532 INFO L231 Difference]: Finished difference. Result has 81 places, 60 transitions, 324 flow [2024-11-17 03:32:13,533 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=324, PETRI_PLACES=81, PETRI_TRANSITIONS=60} [2024-11-17 03:32:13,533 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 31 predicate places. [2024-11-17 03:32:13,534 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 60 transitions, 324 flow [2024-11-17 03:32:13,534 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 24.142857142857142) internal successors, (676), 28 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:13,535 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:32:13,535 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:32:13,548 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-17 03:32:13,735 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,SelfDestructingSolverStorable11 [2024-11-17 03:32:13,736 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-17 03:32:13,736 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:32:13,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1737371554, now seen corresponding path program 1 times [2024-11-17 03:32:13,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:32:13,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563590399] [2024-11-17 03:32:13,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:13,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:32:13,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:13,993 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 18 proven. 26 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-17 03:32:13,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:32:13,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563590399] [2024-11-17 03:32:13,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563590399] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:32:13,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443745245] [2024-11-17 03:32:13,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:13,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:32:13,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:32:13,996 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) [2024-11-17 03:32:13,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-17 03:32:14,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:14,085 INFO L255 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-17 03:32:14,086 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:32:14,092 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 [2024-11-17 03:32:14,254 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 30 proven. 14 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-17 03:32:14,254 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:32:14,481 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 40 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-17 03:32:14,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443745245] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:32:14,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:32:14,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2024-11-17 03:32:14,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774663547] [2024-11-17 03:32:14,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:32:14,482 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-17 03:32:14,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:32:14,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-17 03:32:14,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=628, Unknown=0, NotChecked=0, Total=812 [2024-11-17 03:32:14,862 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 54 [2024-11-17 03:32:14,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 60 transitions, 324 flow. Second operand has 29 states, 29 states have (on average 26.75862068965517) internal successors, (776), 29 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:14,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:32:14,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 54 [2024-11-17 03:32:14,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:32:15,255 INFO L124 PetriNetUnfolderBase]: 230/748 cut-off events. [2024-11-17 03:32:15,255 INFO L125 PetriNetUnfolderBase]: For 983/1017 co-relation queries the response was YES. [2024-11-17 03:32:15,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1986 conditions, 748 events. 230/748 cut-off events. For 983/1017 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 4325 event pairs, 53 based on Foata normal form. 36/703 useless extension candidates. Maximal degree in co-relation 1860. Up to 132 conditions per place. [2024-11-17 03:32:15,260 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 70 selfloop transitions, 16 changer transitions 0/105 dead transitions. [2024-11-17 03:32:15,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 105 transitions, 667 flow [2024-11-17 03:32:15,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-17 03:32:15,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-17 03:32:15,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 384 transitions. [2024-11-17 03:32:15,261 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5925925925925926 [2024-11-17 03:32:15,262 INFO L175 Difference]: Start difference. First operand has 81 places, 60 transitions, 324 flow. Second operand 12 states and 384 transitions. [2024-11-17 03:32:15,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 105 transitions, 667 flow [2024-11-17 03:32:15,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 105 transitions, 656 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-11-17 03:32:15,265 INFO L231 Difference]: Finished difference. Result has 91 places, 61 transitions, 370 flow [2024-11-17 03:32:15,265 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=370, PETRI_PLACES=91, PETRI_TRANSITIONS=61} [2024-11-17 03:32:15,265 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 41 predicate places. [2024-11-17 03:32:15,266 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 61 transitions, 370 flow [2024-11-17 03:32:15,266 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 26.75862068965517) internal successors, (776), 29 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:15,266 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:32:15,266 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:32:15,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-17 03:32:15,470 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-17 03:32:15,471 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-17 03:32:15,471 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:32:15,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1543651414, now seen corresponding path program 1 times [2024-11-17 03:32:15,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:32:15,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403987922] [2024-11-17 03:32:15,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:15,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:32:15,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:15,720 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 18 proven. 25 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-17 03:32:15,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:32:15,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403987922] [2024-11-17 03:32:15,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403987922] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:32:15,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093740654] [2024-11-17 03:32:15,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:15,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:32:15,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:32:15,723 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) [2024-11-17 03:32:15,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-17 03:32:15,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:15,817 INFO L255 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-17 03:32:15,818 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:32:15,967 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 30 proven. 13 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-17 03:32:15,967 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:32:16,049 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 [2024-11-17 03:32:16,139 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 30 proven. 13 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-17 03:32:16,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093740654] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:32:16,139 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:32:16,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2024-11-17 03:32:16,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494040777] [2024-11-17 03:32:16,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:32:16,140 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-17 03:32:16,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:32:16,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-17 03:32:16,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=643, Unknown=0, NotChecked=0, Total=812 [2024-11-17 03:32:16,545 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 54 [2024-11-17 03:32:16,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 61 transitions, 370 flow. Second operand has 29 states, 29 states have (on average 28.06896551724138) internal successors, (814), 29 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:16,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:32:16,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 54 [2024-11-17 03:32:16,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:32:16,943 INFO L124 PetriNetUnfolderBase]: 631/1690 cut-off events. [2024-11-17 03:32:16,943 INFO L125 PetriNetUnfolderBase]: For 3688/3802 co-relation queries the response was YES. [2024-11-17 03:32:16,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4740 conditions, 1690 events. 631/1690 cut-off events. For 3688/3802 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 11899 event pairs, 138 based on Foata normal form. 81/1596 useless extension candidates. Maximal degree in co-relation 4603. Up to 289 conditions per place. [2024-11-17 03:32:16,951 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 80 selfloop transitions, 17 changer transitions 0/114 dead transitions. [2024-11-17 03:32:16,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 114 transitions, 953 flow [2024-11-17 03:32:16,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-17 03:32:16,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-17 03:32:16,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 392 transitions. [2024-11-17 03:32:16,954 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6049382716049383 [2024-11-17 03:32:16,954 INFO L175 Difference]: Start difference. First operand has 91 places, 61 transitions, 370 flow. Second operand 12 states and 392 transitions. [2024-11-17 03:32:16,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 114 transitions, 953 flow [2024-11-17 03:32:16,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 114 transitions, 881 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-11-17 03:32:16,958 INFO L231 Difference]: Finished difference. Result has 96 places, 64 transitions, 410 flow [2024-11-17 03:32:16,960 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=410, PETRI_PLACES=96, PETRI_TRANSITIONS=64} [2024-11-17 03:32:16,960 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 46 predicate places. [2024-11-17 03:32:16,960 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 64 transitions, 410 flow [2024-11-17 03:32:16,961 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 28.06896551724138) internal successors, (814), 29 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:16,961 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:32:16,961 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:32:16,974 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-17 03:32:17,165 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,SelfDestructingSolverStorable13 [2024-11-17 03:32:17,166 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-17 03:32:17,166 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:32:17,166 INFO L85 PathProgramCache]: Analyzing trace with hash 608554107, now seen corresponding path program 1 times [2024-11-17 03:32:17,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:32:17,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756662915] [2024-11-17 03:32:17,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:17,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:32:17,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:17,453 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 18 proven. 26 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-17 03:32:17,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:32:17,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756662915] [2024-11-17 03:32:17,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756662915] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:32:17,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641753203] [2024-11-17 03:32:17,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:17,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:32:17,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:32:17,456 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) [2024-11-17 03:32:17,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-17 03:32:17,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:17,551 INFO L255 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-17 03:32:17,552 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:32:17,565 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 [2024-11-17 03:32:17,569 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 [2024-11-17 03:32:17,661 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-17 03:32:17,661 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-17 03:32:17,673 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-17 03:32:17,673 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 [2024-11-17 03:32:18,027 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 30 proven. 14 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-17 03:32:18,027 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:32:18,380 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 40 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-17 03:32:18,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641753203] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:32:18,381 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:32:18,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 26 [2024-11-17 03:32:18,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476861695] [2024-11-17 03:32:18,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:32:18,381 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-17 03:32:18,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:32:18,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-17 03:32:18,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756 [2024-11-17 03:32:19,018 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 54 [2024-11-17 03:32:19,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 64 transitions, 410 flow. Second operand has 28 states, 28 states have (on average 25.25) internal successors, (707), 28 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:19,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:32:19,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 54 [2024-11-17 03:32:19,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:32:19,558 INFO L124 PetriNetUnfolderBase]: 479/1523 cut-off events. [2024-11-17 03:32:19,558 INFO L125 PetriNetUnfolderBase]: For 3154/3234 co-relation queries the response was YES. [2024-11-17 03:32:19,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4438 conditions, 1523 events. 479/1523 cut-off events. For 3154/3234 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 10925 event pairs, 138 based on Foata normal form. 81/1424 useless extension candidates. Maximal degree in co-relation 4297. Up to 316 conditions per place. [2024-11-17 03:32:19,565 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 77 selfloop transitions, 16 changer transitions 0/113 dead transitions. [2024-11-17 03:32:19,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 113 transitions, 927 flow [2024-11-17 03:32:19,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-17 03:32:19,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-17 03:32:19,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 467 transitions. [2024-11-17 03:32:19,567 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5087145969498911 [2024-11-17 03:32:19,567 INFO L175 Difference]: Start difference. First operand has 96 places, 64 transitions, 410 flow. Second operand 17 states and 467 transitions. [2024-11-17 03:32:19,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 113 transitions, 927 flow [2024-11-17 03:32:19,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 113 transitions, 900 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-11-17 03:32:19,572 INFO L231 Difference]: Finished difference. Result has 108 places, 65 transitions, 440 flow [2024-11-17 03:32:19,574 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=440, PETRI_PLACES=108, PETRI_TRANSITIONS=65} [2024-11-17 03:32:19,574 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 58 predicate places. [2024-11-17 03:32:19,574 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 65 transitions, 440 flow [2024-11-17 03:32:19,575 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 25.25) internal successors, (707), 28 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:19,575 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:32:19,575 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:32:19,588 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-17 03:32:19,775 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,SelfDestructingSolverStorable14 [2024-11-17 03:32:19,776 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-17 03:32:19,776 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:32:19,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1022521398, now seen corresponding path program 1 times [2024-11-17 03:32:19,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:32:19,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440834229] [2024-11-17 03:32:19,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:19,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:32:19,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:19,908 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-11-17 03:32:19,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:32:19,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440834229] [2024-11-17 03:32:19,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440834229] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:32:19,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:32:19,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-17 03:32:19,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756665805] [2024-11-17 03:32:19,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:32:19,909 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:32:19,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:32:19,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:32:19,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:32:19,921 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 54 [2024-11-17 03:32:19,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 65 transitions, 440 flow. Second operand has 5 states, 5 states have (on average 29.8) internal successors, (149), 5 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:19,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:32:19,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 54 [2024-11-17 03:32:19,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:32:20,182 INFO L124 PetriNetUnfolderBase]: 786/2169 cut-off events. [2024-11-17 03:32:20,182 INFO L125 PetriNetUnfolderBase]: For 4826/4888 co-relation queries the response was YES. [2024-11-17 03:32:20,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6570 conditions, 2169 events. 786/2169 cut-off events. For 4826/4888 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 15745 event pairs, 590 based on Foata normal form. 5/1782 useless extension candidates. Maximal degree in co-relation 6426. Up to 1156 conditions per place. [2024-11-17 03:32:20,194 INFO L140 encePairwiseOnDemand]: 50/54 looper letters, 66 selfloop transitions, 3 changer transitions 2/90 dead transitions. [2024-11-17 03:32:20,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 90 transitions, 755 flow [2024-11-17 03:32:20,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:32:20,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:32:20,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 145 transitions. [2024-11-17 03:32:20,195 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6712962962962963 [2024-11-17 03:32:20,196 INFO L175 Difference]: Start difference. First operand has 108 places, 65 transitions, 440 flow. Second operand 4 states and 145 transitions. [2024-11-17 03:32:20,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 90 transitions, 755 flow [2024-11-17 03:32:20,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 90 transitions, 705 flow, removed 3 selfloop flow, removed 15 redundant places. [2024-11-17 03:32:20,203 INFO L231 Difference]: Finished difference. Result has 98 places, 66 transitions, 424 flow [2024-11-17 03:32:20,203 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=408, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=424, PETRI_PLACES=98, PETRI_TRANSITIONS=66} [2024-11-17 03:32:20,203 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 48 predicate places. [2024-11-17 03:32:20,203 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 66 transitions, 424 flow [2024-11-17 03:32:20,204 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.8) internal successors, (149), 5 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:20,204 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:32:20,204 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:32:20,204 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-17 03:32:20,204 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-17 03:32:20,204 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:32:20,204 INFO L85 PathProgramCache]: Analyzing trace with hash -127345508, now seen corresponding path program 2 times [2024-11-17 03:32:20,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:32:20,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49873438] [2024-11-17 03:32:20,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:20,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:32:20,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:20,319 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-11-17 03:32:20,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:32:20,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49873438] [2024-11-17 03:32:20,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49873438] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:32:20,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:32:20,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-17 03:32:20,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000365694] [2024-11-17 03:32:20,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:32:20,320 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:32:20,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:32:20,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:32:20,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:32:20,334 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 54 [2024-11-17 03:32:20,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 66 transitions, 424 flow. Second operand has 5 states, 5 states have (on average 29.8) internal successors, (149), 5 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:20,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:32:20,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 54 [2024-11-17 03:32:20,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:32:20,591 INFO L124 PetriNetUnfolderBase]: 814/1809 cut-off events. [2024-11-17 03:32:20,591 INFO L125 PetriNetUnfolderBase]: For 5323/5486 co-relation queries the response was YES. [2024-11-17 03:32:20,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5987 conditions, 1809 events. 814/1809 cut-off events. For 5323/5486 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 12028 event pairs, 606 based on Foata normal form. 4/1637 useless extension candidates. Maximal degree in co-relation 5851. Up to 1214 conditions per place. [2024-11-17 03:32:20,604 INFO L140 encePairwiseOnDemand]: 50/54 looper letters, 65 selfloop transitions, 3 changer transitions 0/88 dead transitions. [2024-11-17 03:32:20,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 88 transitions, 717 flow [2024-11-17 03:32:20,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:32:20,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:32:20,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 142 transitions. [2024-11-17 03:32:20,605 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6574074074074074 [2024-11-17 03:32:20,605 INFO L175 Difference]: Start difference. First operand has 98 places, 66 transitions, 424 flow. Second operand 4 states and 142 transitions. [2024-11-17 03:32:20,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 88 transitions, 717 flow [2024-11-17 03:32:20,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 88 transitions, 707 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:32:20,611 INFO L231 Difference]: Finished difference. Result has 101 places, 67 transitions, 436 flow [2024-11-17 03:32:20,611 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=420, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=436, PETRI_PLACES=101, PETRI_TRANSITIONS=67} [2024-11-17 03:32:20,612 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 51 predicate places. [2024-11-17 03:32:20,612 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 67 transitions, 436 flow [2024-11-17 03:32:20,612 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.8) internal successors, (149), 5 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:20,612 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:32:20,612 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:32:20,612 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-17 03:32:20,612 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-17 03:32:20,613 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:32:20,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1505366996, now seen corresponding path program 3 times [2024-11-17 03:32:20,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:32:20,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068001572] [2024-11-17 03:32:20,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:20,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:32:20,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:20,758 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-11-17 03:32:20,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:32:20,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068001572] [2024-11-17 03:32:20,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068001572] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:32:20,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:32:20,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-17 03:32:20,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038163350] [2024-11-17 03:32:20,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:32:20,760 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:32:20,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:32:20,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:32:20,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:32:20,772 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 54 [2024-11-17 03:32:20,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 67 transitions, 436 flow. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:20,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:32:20,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 54 [2024-11-17 03:32:20,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:32:21,022 INFO L124 PetriNetUnfolderBase]: 814/2253 cut-off events. [2024-11-17 03:32:21,022 INFO L125 PetriNetUnfolderBase]: For 5586/5643 co-relation queries the response was YES. [2024-11-17 03:32:21,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7171 conditions, 2253 events. 814/2253 cut-off events. For 5586/5643 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 16379 event pairs, 551 based on Foata normal form. 20/2187 useless extension candidates. Maximal degree in co-relation 7033. Up to 1156 conditions per place. [2024-11-17 03:32:21,037 INFO L140 encePairwiseOnDemand]: 49/54 looper letters, 69 selfloop transitions, 4 changer transitions 0/93 dead transitions. [2024-11-17 03:32:21,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 93 transitions, 762 flow [2024-11-17 03:32:21,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:32:21,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:32:21,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 147 transitions. [2024-11-17 03:32:21,038 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6805555555555556 [2024-11-17 03:32:21,038 INFO L175 Difference]: Start difference. First operand has 101 places, 67 transitions, 436 flow. Second operand 4 states and 147 transitions. [2024-11-17 03:32:21,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 93 transitions, 762 flow [2024-11-17 03:32:21,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 93 transitions, 750 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:32:21,046 INFO L231 Difference]: Finished difference. Result has 104 places, 69 transitions, 466 flow [2024-11-17 03:32:21,046 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=432, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=466, PETRI_PLACES=104, PETRI_TRANSITIONS=69} [2024-11-17 03:32:21,046 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 54 predicate places. [2024-11-17 03:32:21,046 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 69 transitions, 466 flow [2024-11-17 03:32:21,047 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:21,047 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:32:21,047 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:32:21,047 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-17 03:32:21,047 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-17 03:32:21,047 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:32:21,047 INFO L85 PathProgramCache]: Analyzing trace with hash -2007142410, now seen corresponding path program 4 times [2024-11-17 03:32:21,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:32:21,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234207973] [2024-11-17 03:32:21,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:21,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:32:21,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:21,182 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-11-17 03:32:21,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:32:21,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234207973] [2024-11-17 03:32:21,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234207973] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:32:21,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:32:21,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-17 03:32:21,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572088378] [2024-11-17 03:32:21,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:32:21,183 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:32:21,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:32:21,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:32:21,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:32:21,194 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 54 [2024-11-17 03:32:21,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 69 transitions, 466 flow. Second operand has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:21,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:32:21,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 54 [2024-11-17 03:32:21,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:32:21,433 INFO L124 PetriNetUnfolderBase]: 591/1987 cut-off events. [2024-11-17 03:32:21,434 INFO L125 PetriNetUnfolderBase]: For 5792/5877 co-relation queries the response was YES. [2024-11-17 03:32:21,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6395 conditions, 1987 events. 591/1987 cut-off events. For 5792/5877 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 14782 event pairs, 53 based on Foata normal form. 20/1987 useless extension candidates. Maximal degree in co-relation 6255. Up to 914 conditions per place. [2024-11-17 03:32:21,451 INFO L140 encePairwiseOnDemand]: 48/54 looper letters, 58 selfloop transitions, 6 changer transitions 1/87 dead transitions. [2024-11-17 03:32:21,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 87 transitions, 759 flow [2024-11-17 03:32:21,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:32:21,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:32:21,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 140 transitions. [2024-11-17 03:32:21,453 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6481481481481481 [2024-11-17 03:32:21,453 INFO L175 Difference]: Start difference. First operand has 104 places, 69 transitions, 466 flow. Second operand 4 states and 140 transitions. [2024-11-17 03:32:21,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 87 transitions, 759 flow [2024-11-17 03:32:21,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 87 transitions, 752 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-17 03:32:21,461 INFO L231 Difference]: Finished difference. Result has 108 places, 70 transitions, 505 flow [2024-11-17 03:32:21,462 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=462, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=505, PETRI_PLACES=108, PETRI_TRANSITIONS=70} [2024-11-17 03:32:21,462 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 58 predicate places. [2024-11-17 03:32:21,462 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 70 transitions, 505 flow [2024-11-17 03:32:21,462 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:21,462 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:32:21,462 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:32:21,463 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-17 03:32:21,463 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-17 03:32:21,463 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:32:21,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1280354376, now seen corresponding path program 1 times [2024-11-17 03:32:21,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:32:21,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437714612] [2024-11-17 03:32:21,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:21,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:32:21,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:21,616 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2024-11-17 03:32:21,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:32:21,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437714612] [2024-11-17 03:32:21,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437714612] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:32:21,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:32:21,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-17 03:32:21,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552197557] [2024-11-17 03:32:21,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:32:21,617 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:32:21,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:32:21,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:32:21,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:32:21,627 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 54 [2024-11-17 03:32:21,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 70 transitions, 505 flow. Second operand has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:21,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:32:21,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 54 [2024-11-17 03:32:21,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:32:21,848 INFO L124 PetriNetUnfolderBase]: 713/2090 cut-off events. [2024-11-17 03:32:21,848 INFO L125 PetriNetUnfolderBase]: For 8015/8153 co-relation queries the response was YES. [2024-11-17 03:32:21,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7206 conditions, 2090 events. 713/2090 cut-off events. For 8015/8153 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 15386 event pairs, 305 based on Foata normal form. 32/2096 useless extension candidates. Maximal degree in co-relation 7063. Up to 1226 conditions per place. [2024-11-17 03:32:21,860 INFO L140 encePairwiseOnDemand]: 48/54 looper letters, 62 selfloop transitions, 7 changer transitions 1/91 dead transitions. [2024-11-17 03:32:21,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 91 transitions, 817 flow [2024-11-17 03:32:21,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:32:21,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:32:21,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 142 transitions. [2024-11-17 03:32:21,861 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6574074074074074 [2024-11-17 03:32:21,861 INFO L175 Difference]: Start difference. First operand has 108 places, 70 transitions, 505 flow. Second operand 4 states and 142 transitions. [2024-11-17 03:32:21,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 91 transitions, 817 flow [2024-11-17 03:32:21,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 91 transitions, 800 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-17 03:32:21,868 INFO L231 Difference]: Finished difference. Result has 108 places, 72 transitions, 546 flow [2024-11-17 03:32:21,868 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=491, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=546, PETRI_PLACES=108, PETRI_TRANSITIONS=72} [2024-11-17 03:32:21,869 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 58 predicate places. [2024-11-17 03:32:21,869 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 72 transitions, 546 flow [2024-11-17 03:32:21,869 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:21,869 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:32:21,869 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:32:21,869 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-17 03:32:21,869 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-17 03:32:21,869 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:32:21,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1761114822, now seen corresponding path program 2 times [2024-11-17 03:32:21,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:32:21,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62893101] [2024-11-17 03:32:21,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:21,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:32:21,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:21,994 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2024-11-17 03:32:21,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:32:21,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62893101] [2024-11-17 03:32:21,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62893101] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:32:21,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:32:21,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-17 03:32:21,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666361868] [2024-11-17 03:32:21,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:32:21,995 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:32:21,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:32:21,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:32:21,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:32:22,007 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 54 [2024-11-17 03:32:22,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 72 transitions, 546 flow. Second operand has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:22,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:32:22,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 54 [2024-11-17 03:32:22,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:32:22,256 INFO L124 PetriNetUnfolderBase]: 953/2212 cut-off events. [2024-11-17 03:32:22,257 INFO L125 PetriNetUnfolderBase]: For 10694/10926 co-relation queries the response was YES. [2024-11-17 03:32:22,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8356 conditions, 2212 events. 953/2212 cut-off events. For 10694/10926 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 15155 event pairs, 675 based on Foata normal form. 22/2133 useless extension candidates. Maximal degree in co-relation 8212. Up to 1499 conditions per place. [2024-11-17 03:32:22,269 INFO L140 encePairwiseOnDemand]: 49/54 looper letters, 65 selfloop transitions, 7 changer transitions 2/94 dead transitions. [2024-11-17 03:32:22,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 94 transitions, 889 flow [2024-11-17 03:32:22,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:32:22,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:32:22,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 142 transitions. [2024-11-17 03:32:22,270 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6574074074074074 [2024-11-17 03:32:22,270 INFO L175 Difference]: Start difference. First operand has 108 places, 72 transitions, 546 flow. Second operand 4 states and 142 transitions. [2024-11-17 03:32:22,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 94 transitions, 889 flow [2024-11-17 03:32:22,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 94 transitions, 881 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-17 03:32:22,280 INFO L231 Difference]: Finished difference. Result has 111 places, 73 transitions, 576 flow [2024-11-17 03:32:22,280 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=540, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=576, PETRI_PLACES=111, PETRI_TRANSITIONS=73} [2024-11-17 03:32:22,281 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 61 predicate places. [2024-11-17 03:32:22,281 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 73 transitions, 576 flow [2024-11-17 03:32:22,281 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:22,281 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:32:22,281 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:32:22,281 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-11-17 03:32:22,281 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-17 03:32:22,281 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:32:22,281 INFO L85 PathProgramCache]: Analyzing trace with hash -540947189, now seen corresponding path program 2 times [2024-11-17 03:32:22,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:32:22,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575358690] [2024-11-17 03:32:22,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:22,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:32:22,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:22,669 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 18 proven. 58 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-17 03:32:22,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:32:22,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575358690] [2024-11-17 03:32:22,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575358690] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:32:22,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529389798] [2024-11-17 03:32:22,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 03:32:22,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:32:22,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:32:22,671 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) [2024-11-17 03:32:22,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-17 03:32:22,776 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-17 03:32:22,776 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:32:22,783 INFO L255 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-17 03:32:22,785 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:32:22,788 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 [2024-11-17 03:32:22,846 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-17 03:32:22,847 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-11-17 03:32:23,271 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-17 03:32:23,271 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:32:23,648 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 40 proven. 36 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-17 03:32:23,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529389798] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:32:23,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:32:23,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 37 [2024-11-17 03:32:23,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917694267] [2024-11-17 03:32:23,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:32:23,650 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-17 03:32:23,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:32:23,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-17 03:32:23,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=1197, Unknown=0, NotChecked=0, Total=1482 [2024-11-17 03:32:24,627 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 54 [2024-11-17 03:32:24,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 73 transitions, 576 flow. Second operand has 39 states, 39 states have (on average 24.0) internal successors, (936), 39 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:24,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:32:24,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 54 [2024-11-17 03:32:24,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:32:25,469 INFO L124 PetriNetUnfolderBase]: 817/2197 cut-off events. [2024-11-17 03:32:25,469 INFO L125 PetriNetUnfolderBase]: For 13505/13670 co-relation queries the response was YES. [2024-11-17 03:32:25,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8506 conditions, 2197 events. 817/2197 cut-off events. For 13505/13670 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 15606 event pairs, 117 based on Foata normal form. 24/2200 useless extension candidates. Maximal degree in co-relation 8361. Up to 342 conditions per place. [2024-11-17 03:32:25,479 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 116 selfloop transitions, 24 changer transitions 0/159 dead transitions. [2024-11-17 03:32:25,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 159 transitions, 1586 flow [2024-11-17 03:32:25,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-17 03:32:25,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-17 03:32:25,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 563 transitions. [2024-11-17 03:32:25,481 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4964726631393298 [2024-11-17 03:32:25,481 INFO L175 Difference]: Start difference. First operand has 111 places, 73 transitions, 576 flow. Second operand 21 states and 563 transitions. [2024-11-17 03:32:25,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 159 transitions, 1586 flow [2024-11-17 03:32:25,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 159 transitions, 1536 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-17 03:32:25,491 INFO L231 Difference]: Finished difference. Result has 129 places, 75 transitions, 645 flow [2024-11-17 03:32:25,491 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=562, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=645, PETRI_PLACES=129, PETRI_TRANSITIONS=75} [2024-11-17 03:32:25,492 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 79 predicate places. [2024-11-17 03:32:25,492 INFO L471 AbstractCegarLoop]: Abstraction has has 129 places, 75 transitions, 645 flow [2024-11-17 03:32:25,492 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 24.0) internal successors, (936), 39 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:25,492 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:32:25,492 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:32:25,505 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-17 03:32:25,696 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,SelfDestructingSolverStorable21 [2024-11-17 03:32:25,696 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-17 03:32:25,697 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:32:25,697 INFO L85 PathProgramCache]: Analyzing trace with hash 410506842, now seen corresponding path program 2 times [2024-11-17 03:32:25,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:32:25,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975552776] [2024-11-17 03:32:25,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:25,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:32:25,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:26,162 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 18 proven. 62 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-17 03:32:26,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:32:26,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975552776] [2024-11-17 03:32:26,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975552776] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:32:26,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962904162] [2024-11-17 03:32:26,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 03:32:26,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:32:26,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:32:26,164 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) [2024-11-17 03:32:26,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-17 03:32:26,254 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-17 03:32:26,254 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:32:26,255 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-17 03:32:26,257 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:32:26,262 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 [2024-11-17 03:32:26,263 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 [2024-11-17 03:32:26,354 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-17 03:32:26,354 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-17 03:32:26,366 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-17 03:32:26,367 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 [2024-11-17 03:32:26,648 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2024-11-17 03:32:26,649 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:32:27,634 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2024-11-17 03:32:27,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962904162] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:32:27,635 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:32:27,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 4, 4] total 22 [2024-11-17 03:32:27,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666170847] [2024-11-17 03:32:27,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:32:27,635 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-17 03:32:27,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:32:27,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-17 03:32:27,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2024-11-17 03:32:28,486 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 54 [2024-11-17 03:32:28,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 75 transitions, 645 flow. Second operand has 23 states, 23 states have (on average 24.347826086956523) internal successors, (560), 23 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:28,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:32:28,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 54 [2024-11-17 03:32:28,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:32:29,782 INFO L124 PetriNetUnfolderBase]: 809/2145 cut-off events. [2024-11-17 03:32:29,782 INFO L125 PetriNetUnfolderBase]: For 12587/12817 co-relation queries the response was YES. [2024-11-17 03:32:29,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8301 conditions, 2145 events. 809/2145 cut-off events. For 12587/12817 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 15176 event pairs, 64 based on Foata normal form. 48/2178 useless extension candidates. Maximal degree in co-relation 8143. Up to 336 conditions per place. [2024-11-17 03:32:29,794 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 162 selfloop transitions, 33 changer transitions 0/214 dead transitions. [2024-11-17 03:32:29,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 214 transitions, 2216 flow [2024-11-17 03:32:29,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-17 03:32:29,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-11-17 03:32:29,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 660 transitions. [2024-11-17 03:32:29,796 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5092592592592593 [2024-11-17 03:32:29,796 INFO L175 Difference]: Start difference. First operand has 129 places, 75 transitions, 645 flow. Second operand 24 states and 660 transitions. [2024-11-17 03:32:29,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 214 transitions, 2216 flow [2024-11-17 03:32:29,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 214 transitions, 2163 flow, removed 4 selfloop flow, removed 19 redundant places. [2024-11-17 03:32:29,807 INFO L231 Difference]: Finished difference. Result has 133 places, 83 transitions, 765 flow [2024-11-17 03:32:29,807 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=582, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=765, PETRI_PLACES=133, PETRI_TRANSITIONS=83} [2024-11-17 03:32:29,808 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 83 predicate places. [2024-11-17 03:32:29,808 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 83 transitions, 765 flow [2024-11-17 03:32:29,808 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 24.347826086956523) internal successors, (560), 23 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:29,808 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:32:29,808 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:32:29,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-17 03:32:30,009 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,SelfDestructingSolverStorable22 [2024-11-17 03:32:30,010 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-17 03:32:30,010 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:32:30,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1894156062, now seen corresponding path program 2 times [2024-11-17 03:32:30,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:32:30,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041741683] [2024-11-17 03:32:30,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:30,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:32:30,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:30,304 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 18 proven. 58 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-17 03:32:30,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:32:30,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041741683] [2024-11-17 03:32:30,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041741683] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:32:30,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806217099] [2024-11-17 03:32:30,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 03:32:30,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:32:30,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:32:30,306 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) [2024-11-17 03:32:30,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-17 03:32:30,413 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-17 03:32:30,413 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:32:30,415 INFO L255 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-17 03:32:30,416 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:32:30,614 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 30 proven. 46 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-17 03:32:30,615 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:32:30,762 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 [2024-11-17 03:32:30,859 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 30 proven. 46 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-17 03:32:30,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806217099] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:32:30,859 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:32:30,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2024-11-17 03:32:30,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147130039] [2024-11-17 03:32:30,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:32:30,860 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-17 03:32:30,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:32:30,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-17 03:32:30,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1200, Unknown=0, NotChecked=0, Total=1406 [2024-11-17 03:32:31,585 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 54 [2024-11-17 03:32:31,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 83 transitions, 765 flow. Second operand has 38 states, 38 states have (on average 27.44736842105263) internal successors, (1043), 38 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:31,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:32:31,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 54 [2024-11-17 03:32:31,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:32:32,521 INFO L124 PetriNetUnfolderBase]: 1621/3761 cut-off events. [2024-11-17 03:32:32,521 INFO L125 PetriNetUnfolderBase]: For 18770/18996 co-relation queries the response was YES. [2024-11-17 03:32:32,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15001 conditions, 3761 events. 1621/3761 cut-off events. For 18770/18996 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 27349 event pairs, 331 based on Foata normal form. 119/3806 useless extension candidates. Maximal degree in co-relation 14846. Up to 578 conditions per place. [2024-11-17 03:32:32,546 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 122 selfloop transitions, 29 changer transitions 0/171 dead transitions. [2024-11-17 03:32:32,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 171 transitions, 1913 flow [2024-11-17 03:32:32,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-17 03:32:32,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-17 03:32:32,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 447 transitions. [2024-11-17 03:32:32,547 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5912698412698413 [2024-11-17 03:32:32,548 INFO L175 Difference]: Start difference. First operand has 133 places, 83 transitions, 765 flow. Second operand 14 states and 447 transitions. [2024-11-17 03:32:32,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 171 transitions, 1913 flow [2024-11-17 03:32:32,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 171 transitions, 1601 flow, removed 5 selfloop flow, removed 22 redundant places. [2024-11-17 03:32:32,565 INFO L231 Difference]: Finished difference. Result has 126 places, 86 transitions, 784 flow [2024-11-17 03:32:32,565 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=669, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=784, PETRI_PLACES=126, PETRI_TRANSITIONS=86} [2024-11-17 03:32:32,565 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 76 predicate places. [2024-11-17 03:32:32,565 INFO L471 AbstractCegarLoop]: Abstraction has has 126 places, 86 transitions, 784 flow [2024-11-17 03:32:32,566 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 27.44736842105263) internal successors, (1043), 38 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:32,566 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:32:32,566 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 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] [2024-11-17 03:32:32,579 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-17 03:32:32,770 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:32:32,771 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-17 03:32:32,771 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:32:32,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1542676278, now seen corresponding path program 1 times [2024-11-17 03:32:32,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:32:32,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039386720] [2024-11-17 03:32:32,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:32,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:32:32,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:33,323 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-11-17 03:32:33,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:32:33,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039386720] [2024-11-17 03:32:33,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039386720] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:32:33,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418781904] [2024-11-17 03:32:33,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:33,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:32:33,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:32:33,325 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) [2024-11-17 03:32:33,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-17 03:32:33,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:33,436 INFO L255 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-17 03:32:33,437 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:32:33,565 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-17 03:32:33,566 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2024-11-17 03:32:33,577 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-11-17 03:32:33,577 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:32:58,202 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-11-17 03:32:58,202 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 50 [2024-11-17 03:32:58,234 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-11-17 03:32:58,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418781904] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:32:58,235 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:32:58,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2024-11-17 03:32:58,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87199000] [2024-11-17 03:32:58,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:32:58,235 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-17 03:32:58,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:32:58,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-17 03:32:58,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=814, Unknown=5, NotChecked=0, Total=930 [2024-11-17 03:33:02,462 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] [2024-11-17 03:33:06,757 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-17 03:33:11,079 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-17 03:33:15,202 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] [2024-11-17 03:33:15,202 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 54 [2024-11-17 03:33:15,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 86 transitions, 784 flow. Second operand has 31 states, 31 states have (on average 20.032258064516128) internal successors, (621), 31 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:33:15,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:15,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 54 [2024-11-17 03:33:15,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:33:17,144 INFO L124 PetriNetUnfolderBase]: 3711/6951 cut-off events. [2024-11-17 03:33:17,144 INFO L125 PetriNetUnfolderBase]: For 26467/26536 co-relation queries the response was YES. [2024-11-17 03:33:17,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25743 conditions, 6951 events. 3711/6951 cut-off events. For 26467/26536 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 45985 event pairs, 1404 based on Foata normal form. 1/6952 useless extension candidates. Maximal degree in co-relation 25588. Up to 3970 conditions per place. [2024-11-17 03:33:17,268 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 177 selfloop transitions, 31 changer transitions 7/224 dead transitions. [2024-11-17 03:33:17,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 224 transitions, 2300 flow [2024-11-17 03:33:17,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-17 03:33:17,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-17 03:33:17,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 478 transitions. [2024-11-17 03:33:17,270 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46588693957115007 [2024-11-17 03:33:17,270 INFO L175 Difference]: Start difference. First operand has 126 places, 86 transitions, 784 flow. Second operand 19 states and 478 transitions. [2024-11-17 03:33:17,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 224 transitions, 2300 flow [2024-11-17 03:33:17,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 224 transitions, 2214 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-11-17 03:33:17,293 INFO L231 Difference]: Finished difference. Result has 144 places, 105 transitions, 1043 flow [2024-11-17 03:33:17,294 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=742, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1043, PETRI_PLACES=144, PETRI_TRANSITIONS=105} [2024-11-17 03:33:17,294 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 94 predicate places. [2024-11-17 03:33:17,294 INFO L471 AbstractCegarLoop]: Abstraction has has 144 places, 105 transitions, 1043 flow [2024-11-17 03:33:17,295 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 20.032258064516128) internal successors, (621), 31 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:33:17,295 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:17,295 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 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] [2024-11-17 03:33:17,308 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-17 03:33:17,498 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:33:17,499 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-17 03:33:17,499 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:17,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1597864080, now seen corresponding path program 2 times [2024-11-17 03:33:17,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:17,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500219668] [2024-11-17 03:33:17,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:17,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:17,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:18,225 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-11-17 03:33:18,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:18,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500219668] [2024-11-17 03:33:18,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500219668] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:33:18,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156722619] [2024-11-17 03:33:18,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 03:33:18,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:33:18,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:33:18,228 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) [2024-11-17 03:33:18,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-17 03:33:18,346 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-17 03:33:18,346 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:33:18,348 INFO L255 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-17 03:33:18,349 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:33:18,544 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-17 03:33:18,544 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-11-17 03:33:18,612 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-11-17 03:33:18,612 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:33:19,230 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-11-17 03:33:19,230 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 58 [2024-11-17 03:33:19,280 INFO L349 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2024-11-17 03:33:19,280 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 1 [2024-11-17 03:33:19,291 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2024-11-17 03:33:19,292 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2024-11-17 03:33:19,301 INFO L349 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2024-11-17 03:33:19,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 1 [2024-11-17 03:33:19,308 INFO L349 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2024-11-17 03:33:19,309 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 1 [2024-11-17 03:33:19,317 INFO L349 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2024-11-17 03:33:19,317 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 1 [2024-11-17 03:33:19,325 INFO L349 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2024-11-17 03:33:19,325 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 1 [2024-11-17 03:33:19,380 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-11-17 03:33:19,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156722619] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:33:19,381 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:33:19,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 31 [2024-11-17 03:33:19,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867469561] [2024-11-17 03:33:19,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:33:19,381 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-17 03:33:19,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:19,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-17 03:33:19,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=809, Unknown=0, NotChecked=0, Total=930 [2024-11-17 03:33:20,326 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 54 [2024-11-17 03:33:20,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 105 transitions, 1043 flow. Second operand has 31 states, 31 states have (on average 23.967741935483872) internal successors, (743), 31 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:33:20,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:20,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 54 [2024-11-17 03:33:20,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:33:21,820 INFO L124 PetriNetUnfolderBase]: 3585/6897 cut-off events. [2024-11-17 03:33:21,820 INFO L125 PetriNetUnfolderBase]: For 33294/33330 co-relation queries the response was YES. [2024-11-17 03:33:21,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27680 conditions, 6897 events. 3585/6897 cut-off events. For 33294/33330 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 46328 event pairs, 1638 based on Foata normal form. 5/6902 useless extension candidates. Maximal degree in co-relation 27535. Up to 4903 conditions per place. [2024-11-17 03:33:21,856 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 129 selfloop transitions, 31 changer transitions 2/172 dead transitions. [2024-11-17 03:33:21,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 172 transitions, 1888 flow [2024-11-17 03:33:21,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-17 03:33:21,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-17 03:33:21,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 422 transitions. [2024-11-17 03:33:21,857 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5209876543209877 [2024-11-17 03:33:21,857 INFO L175 Difference]: Start difference. First operand has 144 places, 105 transitions, 1043 flow. Second operand 15 states and 422 transitions. [2024-11-17 03:33:21,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 172 transitions, 1888 flow [2024-11-17 03:33:21,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 172 transitions, 1749 flow, removed 21 selfloop flow, removed 9 redundant places. [2024-11-17 03:33:21,897 INFO L231 Difference]: Finished difference. Result has 154 places, 126 transitions, 1284 flow [2024-11-17 03:33:21,898 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=941, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1284, PETRI_PLACES=154, PETRI_TRANSITIONS=126} [2024-11-17 03:33:21,898 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 104 predicate places. [2024-11-17 03:33:21,898 INFO L471 AbstractCegarLoop]: Abstraction has has 154 places, 126 transitions, 1284 flow [2024-11-17 03:33:21,898 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 23.967741935483872) internal successors, (743), 31 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:33:21,898 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:21,899 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 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] [2024-11-17 03:33:21,912 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-17 03:33:22,099 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,SelfDestructingSolverStorable25 [2024-11-17 03:33:22,099 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-17 03:33:22,100 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:22,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1405012546, now seen corresponding path program 3 times [2024-11-17 03:33:22,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:22,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016549000] [2024-11-17 03:33:22,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:22,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:22,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:22,950 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-11-17 03:33:22,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:22,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016549000] [2024-11-17 03:33:22,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016549000] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:33:22,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692234950] [2024-11-17 03:33:22,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-17 03:33:22,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:33:22,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:33:22,953 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) [2024-11-17 03:33:22,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-17 03:33:23,059 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-17 03:33:23,059 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:33:23,061 INFO L255 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-17 03:33:23,062 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:33:23,304 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-17 03:33:23,305 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-11-17 03:33:23,356 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-11-17 03:33:23,356 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:33:24,178 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-11-17 03:33:24,178 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 50 [2024-11-17 03:33:24,228 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-11-17 03:33:24,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692234950] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:33:24,228 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:33:24,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 32 [2024-11-17 03:33:24,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481434770] [2024-11-17 03:33:24,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:33:24,229 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-17 03:33:24,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:24,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-17 03:33:24,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2024-11-17 03:33:25,380 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 54 [2024-11-17 03:33:25,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 126 transitions, 1284 flow. Second operand has 32 states, 32 states have (on average 23.96875) internal successors, (767), 32 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:33:25,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:25,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 54 [2024-11-17 03:33:25,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:33:27,319 INFO L124 PetriNetUnfolderBase]: 3734/7155 cut-off events. [2024-11-17 03:33:27,319 INFO L125 PetriNetUnfolderBase]: For 36501/36537 co-relation queries the response was YES. [2024-11-17 03:33:27,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29223 conditions, 7155 events. 3734/7155 cut-off events. For 36501/36537 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 48250 event pairs, 1631 based on Foata normal form. 6/7161 useless extension candidates. Maximal degree in co-relation 29064. Up to 5061 conditions per place. [2024-11-17 03:33:27,359 INFO L140 encePairwiseOnDemand]: 39/54 looper letters, 161 selfloop transitions, 40 changer transitions 4/215 dead transitions. [2024-11-17 03:33:27,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 215 transitions, 2451 flow [2024-11-17 03:33:27,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-17 03:33:27,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-17 03:33:27,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 483 transitions. [2024-11-17 03:33:27,360 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5261437908496732 [2024-11-17 03:33:27,360 INFO L175 Difference]: Start difference. First operand has 154 places, 126 transitions, 1284 flow. Second operand 17 states and 483 transitions. [2024-11-17 03:33:27,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 215 transitions, 2451 flow [2024-11-17 03:33:27,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 215 transitions, 2339 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-11-17 03:33:27,416 INFO L231 Difference]: Finished difference. Result has 172 places, 148 transitions, 1615 flow [2024-11-17 03:33:27,417 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1203, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1615, PETRI_PLACES=172, PETRI_TRANSITIONS=148} [2024-11-17 03:33:27,417 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 122 predicate places. [2024-11-17 03:33:27,417 INFO L471 AbstractCegarLoop]: Abstraction has has 172 places, 148 transitions, 1615 flow [2024-11-17 03:33:27,417 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 23.96875) internal successors, (767), 32 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:33:27,417 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:27,417 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 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] [2024-11-17 03:33:27,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-17 03:33:27,618 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-17 03:33:27,618 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-17 03:33:27,618 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:27,619 INFO L85 PathProgramCache]: Analyzing trace with hash -296826098, now seen corresponding path program 4 times [2024-11-17 03:33:27,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:27,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319896948] [2024-11-17 03:33:27,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:27,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:27,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:28,389 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-11-17 03:33:28,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:28,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319896948] [2024-11-17 03:33:28,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319896948] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:33:28,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088262183] [2024-11-17 03:33:28,389 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-17 03:33:28,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:33:28,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:33:28,391 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) [2024-11-17 03:33:28,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-17 03:33:28,534 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-17 03:33:28,534 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:33:28,536 INFO L255 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-17 03:33:28,538 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:33:28,766 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-17 03:33:28,766 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-11-17 03:33:28,819 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-11-17 03:33:28,819 INFO L311 TraceCheckSpWp]: Computing backward predicates...