./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/parallel-misc-1.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/parallel-misc-1.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 faddac23864cc4e42f962ac43a8d0f59593853dbb1d55e3baabe0c76b2187dd4 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-17 03:35:17,618 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-17 03:35:17,701 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-17 03:35:17,705 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-17 03:35:17,708 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-17 03:35:17,735 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-17 03:35:17,735 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-17 03:35:17,736 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-17 03:35:17,737 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-17 03:35:17,738 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-17 03:35:17,739 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-17 03:35:17,739 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-17 03:35:17,740 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-17 03:35:17,742 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-17 03:35:17,742 INFO L153 SettingsManager]: * Use SBE=true [2024-11-17 03:35:17,742 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-17 03:35:17,743 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-17 03:35:17,756 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-17 03:35:17,756 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-17 03:35:17,756 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-17 03:35:17,756 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-17 03:35:17,757 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-17 03:35:17,757 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-17 03:35:17,757 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-17 03:35:17,758 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-17 03:35:17,758 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-17 03:35:17,758 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-17 03:35:17,758 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-17 03:35:17,759 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-17 03:35:17,759 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-17 03:35:17,759 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-17 03:35:17,760 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-17 03:35:17,760 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-17 03:35:17,760 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:35:17,760 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-17 03:35:17,761 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-17 03:35:17,761 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-17 03:35:17,761 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-17 03:35:17,762 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-17 03:35:17,762 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-17 03:35:17,762 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-17 03:35:17,762 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-17 03:35:17,763 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> faddac23864cc4e42f962ac43a8d0f59593853dbb1d55e3baabe0c76b2187dd4 [2024-11-17 03:35:18,002 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-17 03:35:18,030 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-17 03:35:18,033 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-17 03:35:18,034 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-17 03:35:18,035 INFO L274 PluginConnector]: CDTParser initialized [2024-11-17 03:35:18,036 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/parallel-misc-1.wvr.c [2024-11-17 03:35:19,487 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-17 03:35:19,687 INFO L384 CDTParser]: Found 1 translation units. [2024-11-17 03:35:19,688 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/parallel-misc-1.wvr.c [2024-11-17 03:35:19,696 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e54b2304e/a56fb3b2209d49f3a27aa5de2b103b98/FLAGfb0e3acc7 [2024-11-17 03:35:19,714 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e54b2304e/a56fb3b2209d49f3a27aa5de2b103b98 [2024-11-17 03:35:19,718 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-17 03:35:19,719 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-17 03:35:19,724 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-17 03:35:19,724 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-17 03:35:19,730 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-17 03:35:19,731 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:35:19" (1/1) ... [2024-11-17 03:35:19,731 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8656658 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:35:19, skipping insertion in model container [2024-11-17 03:35:19,732 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:35:19" (1/1) ... [2024-11-17 03:35:19,754 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-17 03:35:19,997 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 03:35:20,005 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:35:20,017 INFO L200 MainTranslator]: Completed pre-run [2024-11-17 03:35:20,053 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:35:20,072 INFO L204 MainTranslator]: Completed translation [2024-11-17 03:35:20,073 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:35:20 WrapperNode [2024-11-17 03:35:20,073 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-17 03:35:20,076 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-17 03:35:20,076 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-17 03:35:20,077 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-17 03:35:20,084 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:35:20" (1/1) ... [2024-11-17 03:35:20,095 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:35:20" (1/1) ... [2024-11-17 03:35:20,125 INFO L138 Inliner]: procedures = 22, calls = 32, calls flagged for inlining = 18, calls inlined = 32, statements flattened = 276 [2024-11-17 03:35:20,126 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-17 03:35:20,127 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-17 03:35:20,127 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-17 03:35:20,127 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-17 03:35:20,137 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:35:20" (1/1) ... [2024-11-17 03:35:20,138 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:35:20" (1/1) ... [2024-11-17 03:35:20,142 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:35:20" (1/1) ... [2024-11-17 03:35:20,165 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-17 03:35:20,166 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:35:20" (1/1) ... [2024-11-17 03:35:20,166 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:35:20" (1/1) ... [2024-11-17 03:35:20,180 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:35:20" (1/1) ... [2024-11-17 03:35:20,181 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:35:20" (1/1) ... [2024-11-17 03:35:20,183 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:35:20" (1/1) ... [2024-11-17 03:35:20,185 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:35:20" (1/1) ... [2024-11-17 03:35:20,191 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-17 03:35:20,192 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-17 03:35:20,192 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-17 03:35:20,192 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-17 03:35:20,193 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:35:20" (1/1) ... [2024-11-17 03:35:20,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:35:20,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:35:20,235 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 03:35:20,244 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 03:35:20,287 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-17 03:35:20,287 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-17 03:35:20,288 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-17 03:35:20,288 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-17 03:35:20,288 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-17 03:35:20,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-17 03:35:20,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-17 03:35:20,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-17 03:35:20,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-17 03:35:20,289 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-17 03:35:20,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-17 03:35:20,289 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-17 03:35:20,290 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-17 03:35:20,290 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-17 03:35:20,291 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 03:35:20,400 INFO L256 CfgBuilder]: Building ICFG [2024-11-17 03:35:20,402 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-17 03:35:20,914 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-17 03:35:20,914 INFO L307 CfgBuilder]: Performing block encoding [2024-11-17 03:35:21,343 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-17 03:35:21,344 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-17 03:35:21,345 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:35:21 BoogieIcfgContainer [2024-11-17 03:35:21,345 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-17 03:35:21,347 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-17 03:35:21,347 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-17 03:35:21,352 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-17 03:35:21,353 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:35:19" (1/3) ... [2024-11-17 03:35:21,354 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6778e78c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:35:21, skipping insertion in model container [2024-11-17 03:35:21,354 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:35:20" (2/3) ... [2024-11-17 03:35:21,355 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6778e78c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:35:21, skipping insertion in model container [2024-11-17 03:35:21,356 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:35:21" (3/3) ... [2024-11-17 03:35:21,358 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-1.wvr.c [2024-11-17 03:35:21,377 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-17 03:35:21,377 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2024-11-17 03:35:21,377 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-17 03:35:21,440 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-17 03:35:21,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 57 places, 58 transitions, 130 flow [2024-11-17 03:35:21,517 INFO L124 PetriNetUnfolderBase]: 8/56 cut-off events. [2024-11-17 03:35:21,518 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-17 03:35:21,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65 conditions, 56 events. 8/56 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 132 event pairs, 0 based on Foata normal form. 0/32 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2024-11-17 03:35:21,523 INFO L82 GeneralOperation]: Start removeDead. Operand has 57 places, 58 transitions, 130 flow [2024-11-17 03:35:21,528 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 54 places, 55 transitions, 122 flow [2024-11-17 03:35:21,537 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-17 03:35:21,544 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;@11888152, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-17 03:35:21,545 INFO L334 AbstractCegarLoop]: Starting to check reachability of 30 error locations. [2024-11-17 03:35:21,549 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-17 03:35:21,549 INFO L124 PetriNetUnfolderBase]: 2/7 cut-off events. [2024-11-17 03:35:21,549 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-17 03:35:21,550 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:35:21,550 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:35:21,551 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-17 03:35:21,557 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:35:21,557 INFO L85 PathProgramCache]: Analyzing trace with hash 26352476, now seen corresponding path program 1 times [2024-11-17 03:35:21,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:35:21,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522786807] [2024-11-17 03:35:21,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:35:21,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:35:21,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:35:21,866 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 03:35:21,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:35:21,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522786807] [2024-11-17 03:35:21,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522786807] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:35:21,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:35:21,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-17 03:35:21,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490249471] [2024-11-17 03:35:21,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:35:21,881 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:35:21,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:35:21,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:35:21,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:35:21,945 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 58 [2024-11-17 03:35:21,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 55 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:35:21,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:35:21,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 58 [2024-11-17 03:35:21,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:35:22,138 INFO L124 PetriNetUnfolderBase]: 220/563 cut-off events. [2024-11-17 03:35:22,139 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2024-11-17 03:35:22,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 931 conditions, 563 events. 220/563 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3304 event pairs, 130 based on Foata normal form. 58/469 useless extension candidates. Maximal degree in co-relation 862. Up to 338 conditions per place. [2024-11-17 03:35:22,156 INFO L140 encePairwiseOnDemand]: 51/58 looper letters, 23 selfloop transitions, 2 changer transitions 0/49 dead transitions. [2024-11-17 03:35:22,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 49 transitions, 160 flow [2024-11-17 03:35:22,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:35:22,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:35:22,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 111 transitions. [2024-11-17 03:35:22,181 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6379310344827587 [2024-11-17 03:35:22,183 INFO L175 Difference]: Start difference. First operand has 54 places, 55 transitions, 122 flow. Second operand 3 states and 111 transitions. [2024-11-17 03:35:22,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 49 transitions, 160 flow [2024-11-17 03:35:22,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 49 transitions, 152 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-17 03:35:22,197 INFO L231 Difference]: Finished difference. Result has 49 places, 49 transitions, 106 flow [2024-11-17 03:35:22,201 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=49, PETRI_TRANSITIONS=49} [2024-11-17 03:35:22,226 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, -5 predicate places. [2024-11-17 03:35:22,230 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 49 transitions, 106 flow [2024-11-17 03:35:22,231 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:35:22,231 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:35:22,231 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:35:22,231 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-17 03:35:22,231 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-17 03:35:22,232 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:35:22,232 INFO L85 PathProgramCache]: Analyzing trace with hash 26352477, now seen corresponding path program 1 times [2024-11-17 03:35:22,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:35:22,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817400511] [2024-11-17 03:35:22,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:35:22,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:35:22,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:35:22,567 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 03:35:22,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:35:22,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817400511] [2024-11-17 03:35:22,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817400511] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:35:22,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:35:22,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:35:22,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173966987] [2024-11-17 03:35:22,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:35:22,569 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:35:22,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:35:22,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:35:22,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:35:22,611 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 58 [2024-11-17 03:35:22,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 49 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:35:22,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:35:22,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 58 [2024-11-17 03:35:22,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:35:22,791 INFO L124 PetriNetUnfolderBase]: 221/568 cut-off events. [2024-11-17 03:35:22,791 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-17 03:35:22,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 926 conditions, 568 events. 221/568 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3304 event pairs, 130 based on Foata normal form. 0/415 useless extension candidates. Maximal degree in co-relation 900. Up to 343 conditions per place. [2024-11-17 03:35:22,796 INFO L140 encePairwiseOnDemand]: 53/58 looper letters, 25 selfloop transitions, 4 changer transitions 0/52 dead transitions. [2024-11-17 03:35:22,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 52 transitions, 172 flow [2024-11-17 03:35:22,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:35:22,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:35:22,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 138 transitions. [2024-11-17 03:35:22,798 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5948275862068966 [2024-11-17 03:35:22,798 INFO L175 Difference]: Start difference. First operand has 49 places, 49 transitions, 106 flow. Second operand 4 states and 138 transitions. [2024-11-17 03:35:22,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 52 transitions, 172 flow [2024-11-17 03:35:22,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 52 transitions, 166 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:35:22,800 INFO L231 Difference]: Finished difference. Result has 52 places, 52 transitions, 129 flow [2024-11-17 03:35:22,800 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=129, PETRI_PLACES=52, PETRI_TRANSITIONS=52} [2024-11-17 03:35:22,801 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, -2 predicate places. [2024-11-17 03:35:22,801 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 52 transitions, 129 flow [2024-11-17 03:35:22,801 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:35:22,802 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:35:22,802 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-11-17 03:35:22,802 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-17 03:35:22,802 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-17 03:35:22,802 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:35:22,803 INFO L85 PathProgramCache]: Analyzing trace with hash -911551271, now seen corresponding path program 1 times [2024-11-17 03:35:22,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:35:22,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042923669] [2024-11-17 03:35:22,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:35:22,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:35:22,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:35:23,032 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 03:35:23,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:35:23,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042923669] [2024-11-17 03:35:23,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042923669] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:35:23,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018489485] [2024-11-17 03:35:23,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:35:23,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:35:23,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:35:23,038 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 03:35:23,039 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 03:35:23,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:35:23,131 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-17 03:35:23,144 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:35:23,223 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 03:35:23,422 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:35:23,423 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:35:23,583 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 03:35:23,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018489485] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:35:23,583 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:35:23,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-17 03:35:23,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215978733] [2024-11-17 03:35:23,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:35:23,584 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-17 03:35:23,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:35:23,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-17 03:35:23,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-11-17 03:35:23,749 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 58 [2024-11-17 03:35:23,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 52 transitions, 129 flow. Second operand has 11 states, 11 states have (on average 27.363636363636363) internal successors, (301), 11 states have internal predecessors, (301), 0 states have call successors, (0), 0 states 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 03:35:23,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:35:23,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 58 [2024-11-17 03:35:23,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:35:24,010 INFO L124 PetriNetUnfolderBase]: 221/567 cut-off events. [2024-11-17 03:35:24,011 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-17 03:35:24,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 935 conditions, 567 events. 221/567 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3304 event pairs, 130 based on Foata normal form. 0/415 useless extension candidates. Maximal degree in co-relation 910. Up to 339 conditions per place. [2024-11-17 03:35:24,016 INFO L140 encePairwiseOnDemand]: 53/58 looper letters, 23 selfloop transitions, 7 changer transitions 0/52 dead transitions. [2024-11-17 03:35:24,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 52 transitions, 187 flow [2024-11-17 03:35:24,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 03:35:24,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 03:35:24,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2024-11-17 03:35:24,018 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5373563218390804 [2024-11-17 03:35:24,018 INFO L175 Difference]: Start difference. First operand has 52 places, 52 transitions, 129 flow. Second operand 6 states and 187 transitions. [2024-11-17 03:35:24,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 52 transitions, 187 flow [2024-11-17 03:35:24,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 52 transitions, 184 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 03:35:24,021 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 136 flow [2024-11-17 03:35:24,021 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=136, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2024-11-17 03:35:24,022 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 1 predicate places. [2024-11-17 03:35:24,022 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 136 flow [2024-11-17 03:35:24,022 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 27.363636363636363) internal successors, (301), 11 states have internal predecessors, (301), 0 states have call successors, (0), 0 states 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 03:35:24,022 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:35:24,023 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:35:24,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-17 03:35:24,226 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 03:35:24,228 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-17 03:35:24,229 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:35:24,229 INFO L85 PathProgramCache]: Analyzing trace with hash -170621491, now seen corresponding path program 1 times [2024-11-17 03:35:24,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:35:24,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770433871] [2024-11-17 03:35:24,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:35:24,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:35:24,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:35:24,304 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 03:35:24,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:35:24,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770433871] [2024-11-17 03:35:24,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770433871] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:35:24,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:35:24,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:35:24,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019687240] [2024-11-17 03:35:24,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:35:24,305 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:35:24,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:35:24,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:35:24,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:35:24,343 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 58 [2024-11-17 03:35:24,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 136 flow. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states 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 03:35:24,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:35:24,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 58 [2024-11-17 03:35:24,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:35:24,465 INFO L124 PetriNetUnfolderBase]: 221/500 cut-off events. [2024-11-17 03:35:24,466 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-11-17 03:35:24,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 871 conditions, 500 events. 221/500 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2573 event pairs, 130 based on Foata normal form. 0/415 useless extension candidates. Maximal degree in co-relation 843. Up to 338 conditions per place. [2024-11-17 03:35:24,470 INFO L140 encePairwiseOnDemand]: 50/58 looper letters, 25 selfloop transitions, 3 changer transitions 0/45 dead transitions. [2024-11-17 03:35:24,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 45 transitions, 180 flow [2024-11-17 03:35:24,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:35:24,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:35:24,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 115 transitions. [2024-11-17 03:35:24,472 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4956896551724138 [2024-11-17 03:35:24,472 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 136 flow. Second operand 4 states and 115 transitions. [2024-11-17 03:35:24,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 45 transitions, 180 flow [2024-11-17 03:35:24,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 45 transitions, 157 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-11-17 03:35:24,474 INFO L231 Difference]: Finished difference. Result has 46 places, 45 transitions, 107 flow [2024-11-17 03:35:24,474 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=107, PETRI_PLACES=46, PETRI_TRANSITIONS=45} [2024-11-17 03:35:24,475 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, -8 predicate places. [2024-11-17 03:35:24,475 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 45 transitions, 107 flow [2024-11-17 03:35:24,475 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states 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 03:35:24,475 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:35:24,476 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:35:24,476 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-17 03:35:24,476 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-17 03:35:24,476 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:35:24,477 INFO L85 PathProgramCache]: Analyzing trace with hash -170621490, now seen corresponding path program 1 times [2024-11-17 03:35:24,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:35:24,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455992592] [2024-11-17 03:35:24,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:35:24,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:35:24,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:35:24,549 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 03:35:24,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:35:24,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455992592] [2024-11-17 03:35:24,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455992592] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:35:24,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:35:24,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-17 03:35:24,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209502276] [2024-11-17 03:35:24,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:35:24,551 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:35:24,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:35:24,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:35:24,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:35:24,582 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 58 [2024-11-17 03:35:24,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 45 transitions, 107 flow. Second operand has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 0 states have call successors, (0), 0 states 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 03:35:24,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:35:24,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 58 [2024-11-17 03:35:24,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:35:24,763 INFO L124 PetriNetUnfolderBase]: 346/749 cut-off events. [2024-11-17 03:35:24,763 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-11-17 03:35:24,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1331 conditions, 749 events. 346/749 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 4069 event pairs, 195 based on Foata normal form. 0/628 useless extension candidates. Maximal degree in co-relation 1005. Up to 314 conditions per place. [2024-11-17 03:35:24,768 INFO L140 encePairwiseOnDemand]: 52/58 looper letters, 53 selfloop transitions, 5 changer transitions 0/72 dead transitions. [2024-11-17 03:35:24,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 72 transitions, 282 flow [2024-11-17 03:35:24,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 03:35:24,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 03:35:24,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 209 transitions. [2024-11-17 03:35:24,771 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6005747126436781 [2024-11-17 03:35:24,771 INFO L175 Difference]: Start difference. First operand has 46 places, 45 transitions, 107 flow. Second operand 6 states and 209 transitions. [2024-11-17 03:35:24,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 72 transitions, 282 flow [2024-11-17 03:35:24,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 72 transitions, 278 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:35:24,774 INFO L231 Difference]: Finished difference. Result has 52 places, 47 transitions, 130 flow [2024-11-17 03:35:24,774 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=130, PETRI_PLACES=52, PETRI_TRANSITIONS=47} [2024-11-17 03:35:24,779 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, -2 predicate places. [2024-11-17 03:35:24,779 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 47 transitions, 130 flow [2024-11-17 03:35:24,780 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 0 states have call successors, (0), 0 states 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 03:35:24,780 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:35:24,780 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:35:24,780 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-17 03:35:24,780 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-17 03:35:24,780 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:35:24,781 INFO L85 PathProgramCache]: Analyzing trace with hash 2110089222, now seen corresponding path program 1 times [2024-11-17 03:35:24,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:35:24,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031791476] [2024-11-17 03:35:24,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:35:24,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:35:24,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:35:24,852 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 03:35:24,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:35:24,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031791476] [2024-11-17 03:35:24,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031791476] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:35:24,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:35:24,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-17 03:35:24,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039627971] [2024-11-17 03:35:24,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:35:24,853 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:35:24,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:35:24,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:35:24,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:35:24,888 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 58 [2024-11-17 03:35:24,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 47 transitions, 130 flow. Second operand has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 0 states have call successors, (0), 0 states 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 03:35:24,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:35:24,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 58 [2024-11-17 03:35:24,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:35:25,047 INFO L124 PetriNetUnfolderBase]: 285/566 cut-off events. [2024-11-17 03:35:25,048 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-11-17 03:35:25,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1081 conditions, 566 events. 285/566 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2738 event pairs, 143 based on Foata normal form. 0/483 useless extension candidates. Maximal degree in co-relation 966. Up to 328 conditions per place. [2024-11-17 03:35:25,051 INFO L140 encePairwiseOnDemand]: 52/58 looper letters, 46 selfloop transitions, 5 changer transitions 0/66 dead transitions. [2024-11-17 03:35:25,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 66 transitions, 275 flow [2024-11-17 03:35:25,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 03:35:25,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 03:35:25,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 202 transitions. [2024-11-17 03:35:25,053 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5804597701149425 [2024-11-17 03:35:25,053 INFO L175 Difference]: Start difference. First operand has 52 places, 47 transitions, 130 flow. Second operand 6 states and 202 transitions. [2024-11-17 03:35:25,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 66 transitions, 275 flow [2024-11-17 03:35:25,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 66 transitions, 275 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-17 03:35:25,056 INFO L231 Difference]: Finished difference. Result has 59 places, 48 transitions, 150 flow [2024-11-17 03:35:25,056 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=150, PETRI_PLACES=59, PETRI_TRANSITIONS=48} [2024-11-17 03:35:25,057 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 5 predicate places. [2024-11-17 03:35:25,057 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 48 transitions, 150 flow [2024-11-17 03:35:25,057 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 0 states have call successors, (0), 0 states 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 03:35:25,057 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:35:25,058 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:35:25,058 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-17 03:35:25,058 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-17 03:35:25,058 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:35:25,058 INFO L85 PathProgramCache]: Analyzing trace with hash 14703058, now seen corresponding path program 1 times [2024-11-17 03:35:25,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:35:25,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506520796] [2024-11-17 03:35:25,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:35:25,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:35:25,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:35:25,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:35:25,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:35:25,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506520796] [2024-11-17 03:35:25,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506520796] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:35:25,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163118223] [2024-11-17 03:35:25,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:35:25,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:35:25,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:35:25,296 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 03:35:25,297 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 03:35:25,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:35:25,377 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-17 03:35:25,380 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:35:25,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:35:25,478 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:35:25,536 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-17 03:35:25,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:35:25,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163118223] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:35:25,556 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:35:25,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 6 [2024-11-17 03:35:25,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407948659] [2024-11-17 03:35:25,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:35:25,557 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-17 03:35:25,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:35:25,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-17 03:35:25,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-17 03:35:25,705 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 58 [2024-11-17 03:35:25,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 48 transitions, 150 flow. Second operand has 8 states, 8 states have (on average 26.625) internal successors, (213), 8 states have internal predecessors, (213), 0 states have call successors, (0), 0 states 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 03:35:25,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:35:25,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 58 [2024-11-17 03:35:25,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:35:25,961 INFO L124 PetriNetUnfolderBase]: 392/829 cut-off events. [2024-11-17 03:35:25,961 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2024-11-17 03:35:25,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1598 conditions, 829 events. 392/829 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 4499 event pairs, 197 based on Foata normal form. 0/715 useless extension candidates. Maximal degree in co-relation 1494. Up to 265 conditions per place. [2024-11-17 03:35:25,966 INFO L140 encePairwiseOnDemand]: 50/58 looper letters, 53 selfloop transitions, 7 changer transitions 0/77 dead transitions. [2024-11-17 03:35:25,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 77 transitions, 333 flow [2024-11-17 03:35:25,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 03:35:25,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 03:35:25,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 215 transitions. [2024-11-17 03:35:25,968 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.617816091954023 [2024-11-17 03:35:25,968 INFO L175 Difference]: Start difference. First operand has 59 places, 48 transitions, 150 flow. Second operand 6 states and 215 transitions. [2024-11-17 03:35:25,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 77 transitions, 333 flow [2024-11-17 03:35:25,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 77 transitions, 328 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:35:25,971 INFO L231 Difference]: Finished difference. Result has 62 places, 48 transitions, 170 flow [2024-11-17 03:35:25,971 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=170, PETRI_PLACES=62, PETRI_TRANSITIONS=48} [2024-11-17 03:35:25,972 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 8 predicate places. [2024-11-17 03:35:25,972 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 48 transitions, 170 flow [2024-11-17 03:35:25,972 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 26.625) internal successors, (213), 8 states have internal predecessors, (213), 0 states have call successors, (0), 0 states 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 03:35:25,973 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:35:25,973 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:35:25,990 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-17 03:35:26,177 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-17 03:35:26,178 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-17 03:35:26,178 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:35:26,178 INFO L85 PathProgramCache]: Analyzing trace with hash -181646582, now seen corresponding path program 1 times [2024-11-17 03:35:26,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:35:26,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051872598] [2024-11-17 03:35:26,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:35:26,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:35:26,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:35:26,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:35:26,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:35:26,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051872598] [2024-11-17 03:35:26,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051872598] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:35:26,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307586634] [2024-11-17 03:35:26,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:35:26,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:35:26,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:35:26,371 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 03:35:26,372 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 03:35:26,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:35:26,451 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-17 03:35:26,453 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:35:26,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:35:26,556 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:35:26,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-17 03:35:26,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:35:26,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307586634] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:35:26,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:35:26,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 6 [2024-11-17 03:35:26,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219804550] [2024-11-17 03:35:26,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:35:26,635 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-17 03:35:26,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:35:26,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-17 03:35:26,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-17 03:35:26,796 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 58 [2024-11-17 03:35:26,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 48 transitions, 170 flow. Second operand has 8 states, 8 states have (on average 27.125) internal successors, (217), 8 states have internal predecessors, (217), 0 states have call successors, (0), 0 states 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 03:35:26,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:35:26,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 58 [2024-11-17 03:35:26,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:35:27,095 INFO L124 PetriNetUnfolderBase]: 636/1124 cut-off events. [2024-11-17 03:35:27,096 INFO L125 PetriNetUnfolderBase]: For 235/235 co-relation queries the response was YES. [2024-11-17 03:35:27,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2443 conditions, 1124 events. 636/1124 cut-off events. For 235/235 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5638 event pairs, 259 based on Foata normal form. 0/934 useless extension candidates. Maximal degree in co-relation 2335. Up to 466 conditions per place. [2024-11-17 03:35:27,103 INFO L140 encePairwiseOnDemand]: 50/58 looper letters, 58 selfloop transitions, 7 changer transitions 0/80 dead transitions. [2024-11-17 03:35:27,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 80 transitions, 393 flow [2024-11-17 03:35:27,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 03:35:27,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 03:35:27,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 214 transitions. [2024-11-17 03:35:27,104 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6149425287356322 [2024-11-17 03:35:27,104 INFO L175 Difference]: Start difference. First operand has 62 places, 48 transitions, 170 flow. Second operand 6 states and 214 transitions. [2024-11-17 03:35:27,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 80 transitions, 393 flow [2024-11-17 03:35:27,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 80 transitions, 388 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:35:27,107 INFO L231 Difference]: Finished difference. Result has 65 places, 48 transitions, 190 flow [2024-11-17 03:35:27,108 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=190, PETRI_PLACES=65, PETRI_TRANSITIONS=48} [2024-11-17 03:35:27,108 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 11 predicate places. [2024-11-17 03:35:27,108 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 48 transitions, 190 flow [2024-11-17 03:35:27,109 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 27.125) internal successors, (217), 8 states have internal predecessors, (217), 0 states have call successors, (0), 0 states 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 03:35:27,109 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:35:27,109 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:35:27,126 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 03:35:27,309 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:35:27,310 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-17 03:35:27,310 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:35:27,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1778821932, now seen corresponding path program 1 times [2024-11-17 03:35:27,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:35:27,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128253162] [2024-11-17 03:35:27,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:35:27,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:35:27,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:35:27,454 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:35:27,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:35:27,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128253162] [2024-11-17 03:35:27,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128253162] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:35:27,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78547133] [2024-11-17 03:35:27,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:35:27,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:35:27,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:35:27,457 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 03:35:27,459 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 03:35:27,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:35:27,534 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-17 03:35:27,536 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:35:27,671 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:35:27,671 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:35:27,769 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:35:27,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78547133] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:35:27,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:35:27,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2024-11-17 03:35:27,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092928440] [2024-11-17 03:35:27,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:35:27,770 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-17 03:35:27,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:35:27,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-17 03:35:27,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2024-11-17 03:35:27,985 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 58 [2024-11-17 03:35:27,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 48 transitions, 190 flow. Second operand has 17 states, 17 states have (on average 26.88235294117647) internal successors, (457), 17 states have internal predecessors, (457), 0 states have call successors, (0), 0 states 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 03:35:27,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:35:27,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 58 [2024-11-17 03:35:27,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:35:28,540 INFO L124 PetriNetUnfolderBase]: 1259/2270 cut-off events. [2024-11-17 03:35:28,540 INFO L125 PetriNetUnfolderBase]: For 812/812 co-relation queries the response was YES. [2024-11-17 03:35:28,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5429 conditions, 2270 events. 1259/2270 cut-off events. For 812/812 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 13379 event pairs, 635 based on Foata normal form. 26/2065 useless extension candidates. Maximal degree in co-relation 4470. Up to 874 conditions per place. [2024-11-17 03:35:28,556 INFO L140 encePairwiseOnDemand]: 50/58 looper letters, 94 selfloop transitions, 13 changer transitions 0/118 dead transitions. [2024-11-17 03:35:28,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 118 transitions, 626 flow [2024-11-17 03:35:28,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-17 03:35:28,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-17 03:35:28,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 370 transitions. [2024-11-17 03:35:28,558 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5799373040752351 [2024-11-17 03:35:28,558 INFO L175 Difference]: Start difference. First operand has 65 places, 48 transitions, 190 flow. Second operand 11 states and 370 transitions. [2024-11-17 03:35:28,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 118 transitions, 626 flow [2024-11-17 03:35:28,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 118 transitions, 620 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:35:28,563 INFO L231 Difference]: Finished difference. Result has 78 places, 55 transitions, 273 flow [2024-11-17 03:35:28,564 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=273, PETRI_PLACES=78, PETRI_TRANSITIONS=55} [2024-11-17 03:35:28,564 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 24 predicate places. [2024-11-17 03:35:28,565 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 55 transitions, 273 flow [2024-11-17 03:35:28,565 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 26.88235294117647) internal successors, (457), 17 states have internal predecessors, (457), 0 states have call successors, (0), 0 states 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 03:35:28,565 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:35:28,565 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:35:28,583 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 03:35:28,769 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:35:28,770 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-17 03:35:28,770 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:35:28,770 INFO L85 PathProgramCache]: Analyzing trace with hash 672467458, now seen corresponding path program 1 times [2024-11-17 03:35:28,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:35:28,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893644205] [2024-11-17 03:35:28,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:35:28,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:35:28,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:35:28,891 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:35:28,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:35:28,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893644205] [2024-11-17 03:35:28,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893644205] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:35:28,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918989053] [2024-11-17 03:35:28,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:35:28,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:35:28,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:35:28,894 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 03:35:28,896 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 03:35:28,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:35:28,969 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-17 03:35:28,971 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:35:29,103 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:35:29,103 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:35:29,202 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:35:29,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918989053] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:35:29,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:35:29,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2024-11-17 03:35:29,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728137198] [2024-11-17 03:35:29,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:35:29,203 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-17 03:35:29,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:35:29,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-17 03:35:29,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2024-11-17 03:35:29,461 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 58 [2024-11-17 03:35:29,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 55 transitions, 273 flow. Second operand has 17 states, 17 states have (on average 27.235294117647058) internal successors, (463), 17 states have internal predecessors, (463), 0 states have call successors, (0), 0 states 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 03:35:29,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:35:29,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 58 [2024-11-17 03:35:29,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:35:29,999 INFO L124 PetriNetUnfolderBase]: 1070/1938 cut-off events. [2024-11-17 03:35:30,000 INFO L125 PetriNetUnfolderBase]: For 994/994 co-relation queries the response was YES. [2024-11-17 03:35:30,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4748 conditions, 1938 events. 1070/1938 cut-off events. For 994/994 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 11043 event pairs, 573 based on Foata normal form. 18/1749 useless extension candidates. Maximal degree in co-relation 3510. Up to 926 conditions per place. [2024-11-17 03:35:30,017 INFO L140 encePairwiseOnDemand]: 50/58 looper letters, 84 selfloop transitions, 13 changer transitions 0/110 dead transitions. [2024-11-17 03:35:30,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 110 transitions, 635 flow [2024-11-17 03:35:30,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-17 03:35:30,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-17 03:35:30,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 366 transitions. [2024-11-17 03:35:30,019 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5736677115987461 [2024-11-17 03:35:30,019 INFO L175 Difference]: Start difference. First operand has 78 places, 55 transitions, 273 flow. Second operand 11 states and 366 transitions. [2024-11-17 03:35:30,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 110 transitions, 635 flow [2024-11-17 03:35:30,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 110 transitions, 628 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-17 03:35:30,025 INFO L231 Difference]: Finished difference. Result has 88 places, 58 transitions, 320 flow [2024-11-17 03:35:30,026 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=320, PETRI_PLACES=88, PETRI_TRANSITIONS=58} [2024-11-17 03:35:30,026 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 34 predicate places. [2024-11-17 03:35:30,026 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 58 transitions, 320 flow [2024-11-17 03:35:30,027 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 27.235294117647058) internal successors, (463), 17 states have internal predecessors, (463), 0 states have call successors, (0), 0 states 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 03:35:30,027 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:35:30,027 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:35:30,044 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-17 03:35:30,228 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-17 03:35:30,228 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-17 03:35:30,229 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:35:30,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1898191912, now seen corresponding path program 1 times [2024-11-17 03:35:30,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:35:30,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099897382] [2024-11-17 03:35:30,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:35:30,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:35:30,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:35:30,339 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 03:35:30,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:35:30,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099897382] [2024-11-17 03:35:30,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099897382] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:35:30,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:35:30,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-17 03:35:30,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316301795] [2024-11-17 03:35:30,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:35:30,343 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:35:30,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:35:30,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:35:30,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:35:30,345 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 58 [2024-11-17 03:35:30,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 58 transitions, 320 flow. Second operand has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 0 states have call successors, (0), 0 states 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 03:35:30,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:35:30,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 58 [2024-11-17 03:35:30,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:35:30,679 INFO L124 PetriNetUnfolderBase]: 1155/2189 cut-off events. [2024-11-17 03:35:30,679 INFO L125 PetriNetUnfolderBase]: For 1298/1298 co-relation queries the response was YES. [2024-11-17 03:35:30,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5466 conditions, 2189 events. 1155/2189 cut-off events. For 1298/1298 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 13426 event pairs, 165 based on Foata normal form. 3/1939 useless extension candidates. Maximal degree in co-relation 4469. Up to 963 conditions per place. [2024-11-17 03:35:30,698 INFO L140 encePairwiseOnDemand]: 48/58 looper letters, 75 selfloop transitions, 14 changer transitions 5/112 dead transitions. [2024-11-17 03:35:30,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 112 transitions, 683 flow [2024-11-17 03:35:30,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:35:30,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:35:30,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 213 transitions. [2024-11-17 03:35:30,700 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7344827586206897 [2024-11-17 03:35:30,700 INFO L175 Difference]: Start difference. First operand has 88 places, 58 transitions, 320 flow. Second operand 5 states and 213 transitions. [2024-11-17 03:35:30,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 112 transitions, 683 flow [2024-11-17 03:35:30,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 112 transitions, 671 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-17 03:35:30,710 INFO L231 Difference]: Finished difference. Result has 90 places, 66 transitions, 368 flow [2024-11-17 03:35:30,711 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=368, PETRI_PLACES=90, PETRI_TRANSITIONS=66} [2024-11-17 03:35:30,711 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 36 predicate places. [2024-11-17 03:35:30,712 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 66 transitions, 368 flow [2024-11-17 03:35:30,712 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 0 states have call successors, (0), 0 states 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 03:35:30,712 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:35:30,712 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:35:30,713 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-17 03:35:30,713 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-17 03:35:30,713 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:35:30,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1043274664, now seen corresponding path program 2 times [2024-11-17 03:35:30,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:35:30,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363574082] [2024-11-17 03:35:30,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:35:30,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:35:30,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:35:31,019 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:35:31,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:35:31,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363574082] [2024-11-17 03:35:31,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363574082] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:35:31,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143694544] [2024-11-17 03:35:31,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 03:35:31,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:35:31,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:35:31,022 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 03:35:31,024 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 03:35:31,104 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-17 03:35:31,104 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:35:31,106 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-17 03:35:31,107 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:35:31,119 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 03:35:31,369 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:35:31,369 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:35:31,748 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:35:31,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143694544] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:35:31,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:35:31,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 8] total 21 [2024-11-17 03:35:31,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253806489] [2024-11-17 03:35:31,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:35:31,749 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-17 03:35:31,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:35:31,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-17 03:35:31,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2024-11-17 03:35:32,434 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 58 [2024-11-17 03:35:32,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 66 transitions, 368 flow. Second operand has 23 states, 23 states have (on average 22.956521739130434) internal successors, (528), 23 states have internal predecessors, (528), 0 states have call successors, (0), 0 states 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 03:35:32,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:35:32,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 58 [2024-11-17 03:35:32,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:35:34,307 INFO L124 PetriNetUnfolderBase]: 3918/6678 cut-off events. [2024-11-17 03:35:34,308 INFO L125 PetriNetUnfolderBase]: For 7035/7073 co-relation queries the response was YES. [2024-11-17 03:35:34,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21250 conditions, 6678 events. 3918/6678 cut-off events. For 7035/7073 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 43539 event pairs, 705 based on Foata normal form. 168/6792 useless extension candidates. Maximal degree in co-relation 18000. Up to 1118 conditions per place. [2024-11-17 03:35:34,383 INFO L140 encePairwiseOnDemand]: 49/58 looper letters, 307 selfloop transitions, 26 changer transitions 0/344 dead transitions. [2024-11-17 03:35:34,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 344 transitions, 2337 flow [2024-11-17 03:35:34,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-17 03:35:34,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-17 03:35:34,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 626 transitions. [2024-11-17 03:35:34,387 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5680580762250453 [2024-11-17 03:35:34,387 INFO L175 Difference]: Start difference. First operand has 90 places, 66 transitions, 368 flow. Second operand 19 states and 626 transitions. [2024-11-17 03:35:34,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 344 transitions, 2337 flow [2024-11-17 03:35:34,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 344 transitions, 2285 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-11-17 03:35:34,427 INFO L231 Difference]: Finished difference. Result has 107 places, 83 transitions, 555 flow [2024-11-17 03:35:34,427 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=555, PETRI_PLACES=107, PETRI_TRANSITIONS=83} [2024-11-17 03:35:34,428 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 53 predicate places. [2024-11-17 03:35:34,428 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 83 transitions, 555 flow [2024-11-17 03:35:34,428 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 22.956521739130434) internal successors, (528), 23 states have internal predecessors, (528), 0 states have call successors, (0), 0 states 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 03:35:34,428 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:35:34,428 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:35:34,448 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-17 03:35:34,629 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:35:34,629 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-17 03:35:34,630 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:35:34,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1782420832, now seen corresponding path program 1 times [2024-11-17 03:35:34,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:35:34,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313974474] [2024-11-17 03:35:34,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:35:34,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:35:34,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:35:34,923 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:35:34,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:35:34,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313974474] [2024-11-17 03:35:34,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313974474] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:35:34,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24072658] [2024-11-17 03:35:34,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:35:34,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:35:34,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:35:34,926 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 03:35:34,928 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 03:35:35,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:35:35,015 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-17 03:35:35,017 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:35:35,206 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:35:35,206 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:35:35,319 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 03:35:35,375 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:35:35,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24072658] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:35:35,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:35:35,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 15 [2024-11-17 03:35:35,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592465806] [2024-11-17 03:35:35,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:35:35,377 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-17 03:35:35,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:35:35,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-17 03:35:35,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2024-11-17 03:35:35,806 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 58 [2024-11-17 03:35:35,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 83 transitions, 555 flow. Second operand has 17 states, 17 states have (on average 27.529411764705884) internal successors, (468), 17 states have internal predecessors, (468), 0 states have call successors, (0), 0 states 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 03:35:35,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:35:35,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 58 [2024-11-17 03:35:35,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:35:37,273 INFO L124 PetriNetUnfolderBase]: 4495/8086 cut-off events. [2024-11-17 03:35:37,273 INFO L125 PetriNetUnfolderBase]: For 12108/12232 co-relation queries the response was YES. [2024-11-17 03:35:37,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26364 conditions, 8086 events. 4495/8086 cut-off events. For 12108/12232 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 56680 event pairs, 1404 based on Foata normal form. 155/8063 useless extension candidates. Maximal degree in co-relation 22573. Up to 1963 conditions per place. [2024-11-17 03:35:37,344 INFO L140 encePairwiseOnDemand]: 52/58 looper letters, 133 selfloop transitions, 12 changer transitions 0/171 dead transitions. [2024-11-17 03:35:37,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 171 transitions, 1362 flow [2024-11-17 03:35:37,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-17 03:35:37,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-17 03:35:37,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 280 transitions. [2024-11-17 03:35:37,348 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.603448275862069 [2024-11-17 03:35:37,348 INFO L175 Difference]: Start difference. First operand has 107 places, 83 transitions, 555 flow. Second operand 8 states and 280 transitions. [2024-11-17 03:35:37,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 171 transitions, 1362 flow [2024-11-17 03:35:37,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 171 transitions, 1310 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-11-17 03:35:37,395 INFO L231 Difference]: Finished difference. Result has 111 places, 86 transitions, 578 flow [2024-11-17 03:35:37,395 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=525, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=578, PETRI_PLACES=111, PETRI_TRANSITIONS=86} [2024-11-17 03:35:37,397 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 57 predicate places. [2024-11-17 03:35:37,397 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 86 transitions, 578 flow [2024-11-17 03:35:37,397 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 27.529411764705884) internal successors, (468), 17 states have internal predecessors, (468), 0 states have call successors, (0), 0 states 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 03:35:37,397 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:35:37,397 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:35:37,415 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 03:35:37,598 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:35:37,598 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-17 03:35:37,599 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:35:37,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1614717208, now seen corresponding path program 1 times [2024-11-17 03:35:37,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:35:37,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959360557] [2024-11-17 03:35:37,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:35:37,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:35:37,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:35:37,757 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:35:37,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:35:37,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959360557] [2024-11-17 03:35:37,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959360557] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:35:37,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105784847] [2024-11-17 03:35:37,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:35:37,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:35:37,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:35:37,760 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 03:35:37,761 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 03:35:37,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:35:37,843 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-17 03:35:37,845 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:35:38,029 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:35:38,029 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:35:38,145 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:35:38,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105784847] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:35:38,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:35:38,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 21 [2024-11-17 03:35:38,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067646057] [2024-11-17 03:35:38,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:35:38,146 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-17 03:35:38,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:35:38,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-17 03:35:38,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2024-11-17 03:35:38,377 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 58 [2024-11-17 03:35:38,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 86 transitions, 578 flow. Second operand has 22 states, 22 states have (on average 27.454545454545453) internal successors, (604), 22 states have internal predecessors, (604), 0 states have call successors, (0), 0 states 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 03:35:38,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:35:38,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 58 [2024-11-17 03:35:38,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:35:39,964 INFO L124 PetriNetUnfolderBase]: 5538/9610 cut-off events. [2024-11-17 03:35:39,964 INFO L125 PetriNetUnfolderBase]: For 17106/17306 co-relation queries the response was YES. [2024-11-17 03:35:40,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32278 conditions, 9610 events. 5538/9610 cut-off events. For 17106/17306 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 65310 event pairs, 2067 based on Foata normal form. 176/9720 useless extension candidates. Maximal degree in co-relation 24106. Up to 3075 conditions per place. [2024-11-17 03:35:40,075 INFO L140 encePairwiseOnDemand]: 50/58 looper letters, 193 selfloop transitions, 18 changer transitions 0/231 dead transitions. [2024-11-17 03:35:40,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 231 transitions, 1814 flow [2024-11-17 03:35:40,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-17 03:35:40,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-17 03:35:40,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 472 transitions. [2024-11-17 03:35:40,077 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5812807881773399 [2024-11-17 03:35:40,078 INFO L175 Difference]: Start difference. First operand has 111 places, 86 transitions, 578 flow. Second operand 14 states and 472 transitions. [2024-11-17 03:35:40,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 231 transitions, 1814 flow [2024-11-17 03:35:40,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 231 transitions, 1793 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-11-17 03:35:40,115 INFO L231 Difference]: Finished difference. Result has 123 places, 92 transitions, 662 flow [2024-11-17 03:35:40,116 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=560, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=662, PETRI_PLACES=123, PETRI_TRANSITIONS=92} [2024-11-17 03:35:40,117 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 69 predicate places. [2024-11-17 03:35:40,117 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 92 transitions, 662 flow [2024-11-17 03:35:40,118 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 27.454545454545453) internal successors, (604), 22 states have internal predecessors, (604), 0 states have call successors, (0), 0 states 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 03:35:40,118 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:35:40,118 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:35:40,136 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 03:35:40,322 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-17 03:35:40,323 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-17 03:35:40,323 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:35:40,324 INFO L85 PathProgramCache]: Analyzing trace with hash -33087878, now seen corresponding path program 1 times [2024-11-17 03:35:40,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:35:40,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964175915] [2024-11-17 03:35:40,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:35:40,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:35:40,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:35:40,503 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:35:40,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:35:40,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964175915] [2024-11-17 03:35:40,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964175915] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:35:40,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124677643] [2024-11-17 03:35:40,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:35:40,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:35:40,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:35:40,506 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 03:35:40,507 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 03:35:40,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:35:40,602 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-17 03:35:40,603 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:35:40,694 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:35:40,694 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:35:40,755 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:35:40,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124677643] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-17 03:35:40,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-17 03:35:40,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 8 [2024-11-17 03:35:40,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322128582] [2024-11-17 03:35:40,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:35:40,757 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:35:40,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:35:40,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:35:40,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-11-17 03:35:40,777 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 58 [2024-11-17 03:35:40,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 92 transitions, 662 flow. Second operand has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 states have internal predecessors, (144), 0 states have call successors, (0), 0 states 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 03:35:40,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:35:40,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 58 [2024-11-17 03:35:40,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:35:41,858 INFO L124 PetriNetUnfolderBase]: 5130/9131 cut-off events. [2024-11-17 03:35:41,858 INFO L125 PetriNetUnfolderBase]: For 19614/19726 co-relation queries the response was YES. [2024-11-17 03:35:41,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32082 conditions, 9131 events. 5130/9131 cut-off events. For 19614/19726 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 62198 event pairs, 2397 based on Foata normal form. 175/9257 useless extension candidates. Maximal degree in co-relation 23825. Up to 5407 conditions per place. [2024-11-17 03:35:41,914 INFO L140 encePairwiseOnDemand]: 52/58 looper letters, 79 selfloop transitions, 12 changer transitions 0/111 dead transitions. [2024-11-17 03:35:41,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 111 transitions, 963 flow [2024-11-17 03:35:41,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:35:41,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:35:41,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 165 transitions. [2024-11-17 03:35:41,916 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5689655172413793 [2024-11-17 03:35:41,916 INFO L175 Difference]: Start difference. First operand has 123 places, 92 transitions, 662 flow. Second operand 5 states and 165 transitions. [2024-11-17 03:35:41,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 111 transitions, 963 flow [2024-11-17 03:35:41,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 111 transitions, 947 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-11-17 03:35:41,954 INFO L231 Difference]: Finished difference. Result has 122 places, 91 transitions, 685 flow [2024-11-17 03:35:41,955 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=630, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=685, PETRI_PLACES=122, PETRI_TRANSITIONS=91} [2024-11-17 03:35:41,955 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 68 predicate places. [2024-11-17 03:35:41,955 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 91 transitions, 685 flow [2024-11-17 03:35:41,956 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 states have internal predecessors, (144), 0 states have call successors, (0), 0 states 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 03:35:41,956 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:35:41,956 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:35:41,972 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 03:35:42,160 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,SelfDestructingSolverStorable14 [2024-11-17 03:35:42,161 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-17 03:35:42,161 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:35:42,161 INFO L85 PathProgramCache]: Analyzing trace with hash 2033789732, now seen corresponding path program 1 times [2024-11-17 03:35:42,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:35:42,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377152294] [2024-11-17 03:35:42,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:35:42,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:35:42,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:35:42,308 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:35:42,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:35:42,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377152294] [2024-11-17 03:35:42,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377152294] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:35:42,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231195130] [2024-11-17 03:35:42,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:35:42,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:35:42,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:35:42,311 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 03:35:42,312 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 03:35:42,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:35:42,399 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-17 03:35:42,400 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:35:42,443 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:35:42,443 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:35:42,479 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:35:42,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231195130] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-17 03:35:42,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-17 03:35:42,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 8 [2024-11-17 03:35:42,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969172654] [2024-11-17 03:35:42,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:35:42,480 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:35:42,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:35:42,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:35:42,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-11-17 03:35:42,502 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 58 [2024-11-17 03:35:42,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 91 transitions, 685 flow. Second operand has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 states have internal predecessors, (144), 0 states have call successors, (0), 0 states 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 03:35:42,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:35:42,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 58 [2024-11-17 03:35:42,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:35:43,442 INFO L124 PetriNetUnfolderBase]: 4802/8444 cut-off events. [2024-11-17 03:35:43,442 INFO L125 PetriNetUnfolderBase]: For 26291/26317 co-relation queries the response was YES. [2024-11-17 03:35:43,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31566 conditions, 8444 events. 4802/8444 cut-off events. For 26291/26317 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 55641 event pairs, 2260 based on Foata normal form. 88/8492 useless extension candidates. Maximal degree in co-relation 24124. Up to 5196 conditions per place. [2024-11-17 03:35:43,522 INFO L140 encePairwiseOnDemand]: 52/58 looper letters, 82 selfloop transitions, 15 changer transitions 0/111 dead transitions. [2024-11-17 03:35:43,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 111 transitions, 1032 flow [2024-11-17 03:35:43,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:35:43,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:35:43,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 166 transitions. [2024-11-17 03:35:43,524 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5724137931034483 [2024-11-17 03:35:43,524 INFO L175 Difference]: Start difference. First operand has 122 places, 91 transitions, 685 flow. Second operand 5 states and 166 transitions. [2024-11-17 03:35:43,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 111 transitions, 1032 flow [2024-11-17 03:35:43,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 111 transitions, 1009 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-17 03:35:43,608 INFO L231 Difference]: Finished difference. Result has 122 places, 89 transitions, 697 flow [2024-11-17 03:35:43,608 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=643, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=697, PETRI_PLACES=122, PETRI_TRANSITIONS=89} [2024-11-17 03:35:43,609 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 68 predicate places. [2024-11-17 03:35:43,609 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 89 transitions, 697 flow [2024-11-17 03:35:43,609 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 states have internal predecessors, (144), 0 states have call successors, (0), 0 states 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 03:35:43,609 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:35:43,609 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:35:43,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-17 03:35:43,810 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,SelfDestructingSolverStorable15 [2024-11-17 03:35:43,810 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-17 03:35:43,810 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:35:43,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1946193820, now seen corresponding path program 1 times [2024-11-17 03:35:43,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:35:43,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942105421] [2024-11-17 03:35:43,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:35:43,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:35:43,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:35:44,135 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:35:44,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:35:44,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942105421] [2024-11-17 03:35:44,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942105421] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:35:44,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336413873] [2024-11-17 03:35:44,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:35:44,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:35:44,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:35:44,139 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 03:35:44,140 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 03:35:44,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:35:44,246 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-17 03:35:44,248 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:35:44,452 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:35:44,452 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:35:44,608 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 03:35:44,679 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:35:44,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336413873] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:35:44,680 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:35:44,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2024-11-17 03:35:44,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372976903] [2024-11-17 03:35:44,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:35:44,681 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-17 03:35:44,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:35:44,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-17 03:35:44,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2024-11-17 03:35:45,150 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 58 [2024-11-17 03:35:45,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 89 transitions, 697 flow. Second operand has 20 states, 20 states have (on average 27.5) internal successors, (550), 20 states have internal predecessors, (550), 0 states have call successors, (0), 0 states 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 03:35:45,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:35:45,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 58 [2024-11-17 03:35:45,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:35:46,740 INFO L124 PetriNetUnfolderBase]: 4546/7998 cut-off events. [2024-11-17 03:35:46,740 INFO L125 PetriNetUnfolderBase]: For 26770/26917 co-relation queries the response was YES. [2024-11-17 03:35:46,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30000 conditions, 7998 events. 4546/7998 cut-off events. For 26770/26917 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 53481 event pairs, 845 based on Foata normal form. 207/8084 useless extension candidates. Maximal degree in co-relation 21490. Up to 2785 conditions per place. [2024-11-17 03:35:46,833 INFO L140 encePairwiseOnDemand]: 52/58 looper letters, 160 selfloop transitions, 19 changer transitions 0/205 dead transitions. [2024-11-17 03:35:46,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 205 transitions, 1737 flow [2024-11-17 03:35:46,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-17 03:35:46,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-17 03:35:46,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 352 transitions. [2024-11-17 03:35:46,835 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6068965517241379 [2024-11-17 03:35:46,835 INFO L175 Difference]: Start difference. First operand has 122 places, 89 transitions, 697 flow. Second operand 10 states and 352 transitions. [2024-11-17 03:35:46,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 205 transitions, 1737 flow [2024-11-17 03:35:46,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 205 transitions, 1714 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-11-17 03:35:46,898 INFO L231 Difference]: Finished difference. Result has 130 places, 93 transitions, 769 flow [2024-11-17 03:35:46,898 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=675, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=769, PETRI_PLACES=130, PETRI_TRANSITIONS=93} [2024-11-17 03:35:46,899 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 76 predicate places. [2024-11-17 03:35:46,899 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 93 transitions, 769 flow [2024-11-17 03:35:46,899 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 27.5) internal successors, (550), 20 states have internal predecessors, (550), 0 states have call successors, (0), 0 states 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 03:35:46,900 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:35:46,900 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:35:46,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-17 03:35:47,100 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,SelfDestructingSolverStorable16 [2024-11-17 03:35:47,101 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-17 03:35:47,101 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:35:47,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1434209052, now seen corresponding path program 2 times [2024-11-17 03:35:47,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:35:47,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917981494] [2024-11-17 03:35:47,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:35:47,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:35:47,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:35:47,518 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:35:47,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:35:47,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917981494] [2024-11-17 03:35:47,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917981494] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:35:47,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303104017] [2024-11-17 03:35:47,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 03:35:47,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:35:47,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:35:47,522 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 03:35:47,524 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 03:35:47,616 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-17 03:35:47,616 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:35:47,618 INFO L255 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-17 03:35:47,620 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:35:47,847 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:35:47,847 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:35:48,002 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 03:35:48,085 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:35:48,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303104017] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:35:48,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:35:48,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 21 [2024-11-17 03:35:48,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009213950] [2024-11-17 03:35:48,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:35:48,087 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-17 03:35:48,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:35:48,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-17 03:35:48,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2024-11-17 03:35:48,674 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 58 [2024-11-17 03:35:48,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 93 transitions, 769 flow. Second operand has 23 states, 23 states have (on average 27.652173913043477) internal successors, (636), 23 states have internal predecessors, (636), 0 states have call successors, (0), 0 states 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 03:35:48,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:35:48,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 58 [2024-11-17 03:35:48,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:35:49,996 INFO L124 PetriNetUnfolderBase]: 5433/9848 cut-off events. [2024-11-17 03:35:49,996 INFO L125 PetriNetUnfolderBase]: For 35835/35979 co-relation queries the response was YES. [2024-11-17 03:35:50,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38339 conditions, 9848 events. 5433/9848 cut-off events. For 35835/35979 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 67651 event pairs, 1246 based on Foata normal form. 161/9871 useless extension candidates. Maximal degree in co-relation 29382. Up to 2753 conditions per place. [2024-11-17 03:35:50,077 INFO L140 encePairwiseOnDemand]: 52/58 looper letters, 165 selfloop transitions, 18 changer transitions 0/209 dead transitions. [2024-11-17 03:35:50,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 209 transitions, 1943 flow [2024-11-17 03:35:50,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-17 03:35:50,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-17 03:35:50,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 348 transitions. [2024-11-17 03:35:50,080 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-11-17 03:35:50,080 INFO L175 Difference]: Start difference. First operand has 130 places, 93 transitions, 769 flow. Second operand 10 states and 348 transitions. [2024-11-17 03:35:50,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 209 transitions, 1943 flow [2024-11-17 03:35:50,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 209 transitions, 1907 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-11-17 03:35:50,138 INFO L231 Difference]: Finished difference. Result has 135 places, 97 transitions, 843 flow [2024-11-17 03:35:50,138 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=753, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=843, PETRI_PLACES=135, PETRI_TRANSITIONS=97} [2024-11-17 03:35:50,139 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 81 predicate places. [2024-11-17 03:35:50,139 INFO L471 AbstractCegarLoop]: Abstraction has has 135 places, 97 transitions, 843 flow [2024-11-17 03:35:50,139 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 27.652173913043477) internal successors, (636), 23 states have internal predecessors, (636), 0 states have call successors, (0), 0 states 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 03:35:50,139 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:35:50,139 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:35:50,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-17 03:35:50,340 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,SelfDestructingSolverStorable17 [2024-11-17 03:35:50,340 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-17 03:35:50,340 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:35:50,340 INFO L85 PathProgramCache]: Analyzing trace with hash 907099002, now seen corresponding path program 1 times [2024-11-17 03:35:50,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:35:50,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784255683] [2024-11-17 03:35:50,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:35:50,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:35:50,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:35:50,922 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:35:50,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:35:50,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784255683] [2024-11-17 03:35:50,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784255683] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:35:50,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410085191] [2024-11-17 03:35:50,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:35:50,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:35:50,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:35:50,927 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 03:35:50,929 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 03:35:51,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:35:51,017 INFO L255 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-17 03:35:51,019 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:35:51,037 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-17 03:35:51,297 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-17 03:35:51,321 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:35:51,321 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:35:51,417 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:35:51,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410085191] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:35:51,417 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:35:51,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 9] total 23 [2024-11-17 03:35:51,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514167482] [2024-11-17 03:35:51,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:35:51,418 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-17 03:35:51,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:35:51,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-17 03:35:51,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2024-11-17 03:35:52,792 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 58 [2024-11-17 03:35:52,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 97 transitions, 843 flow. Second operand has 23 states, 23 states have (on average 30.304347826086957) internal successors, (697), 23 states have internal predecessors, (697), 0 states have call successors, (0), 0 states 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 03:35:52,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:35:52,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 58 [2024-11-17 03:35:52,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:35:54,537 INFO L124 PetriNetUnfolderBase]: 6610/12273 cut-off events. [2024-11-17 03:35:54,537 INFO L125 PetriNetUnfolderBase]: For 56352/56502 co-relation queries the response was YES. [2024-11-17 03:35:54,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49790 conditions, 12273 events. 6610/12273 cut-off events. For 56352/56502 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 89821 event pairs, 632 based on Foata normal form. 139/12348 useless extension candidates. Maximal degree in co-relation 36742. Up to 5250 conditions per place. [2024-11-17 03:35:54,687 INFO L140 encePairwiseOnDemand]: 42/58 looper letters, 187 selfloop transitions, 56 changer transitions 3/273 dead transitions. [2024-11-17 03:35:54,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 273 transitions, 2781 flow [2024-11-17 03:35:54,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-17 03:35:54,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-17 03:35:54,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 534 transitions. [2024-11-17 03:35:54,689 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6576354679802956 [2024-11-17 03:35:54,689 INFO L175 Difference]: Start difference. First operand has 135 places, 97 transitions, 843 flow. Second operand 14 states and 534 transitions. [2024-11-17 03:35:54,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 273 transitions, 2781 flow [2024-11-17 03:35:54,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 273 transitions, 2737 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-11-17 03:35:54,780 INFO L231 Difference]: Finished difference. Result has 150 places, 137 transitions, 1395 flow [2024-11-17 03:35:54,781 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=820, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1395, PETRI_PLACES=150, PETRI_TRANSITIONS=137} [2024-11-17 03:35:54,781 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 96 predicate places. [2024-11-17 03:35:54,781 INFO L471 AbstractCegarLoop]: Abstraction has has 150 places, 137 transitions, 1395 flow [2024-11-17 03:35:54,782 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 30.304347826086957) internal successors, (697), 23 states have internal predecessors, (697), 0 states have call successors, (0), 0 states 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 03:35:54,782 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:35:54,782 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:35:54,794 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 03:35:54,982 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:35:54,982 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-17 03:35:54,983 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:35:54,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1611010018, now seen corresponding path program 2 times [2024-11-17 03:35:54,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:35:54,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981439128] [2024-11-17 03:35:54,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:35:54,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:35:55,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:35:55,884 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:35:55,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:35:55,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981439128] [2024-11-17 03:35:55,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981439128] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:35:55,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931622510] [2024-11-17 03:35:55,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 03:35:55,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:35:55,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:35:55,887 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 03:35:55,890 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 03:35:55,980 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-17 03:35:55,981 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:35:55,983 INFO L255 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-17 03:35:55,984 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:35:56,302 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-17 03:35:56,374 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:35:56,374 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:35:56,425 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-17 03:35:56,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 16 [2024-11-17 03:35:56,619 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:35:56,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931622510] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:35:56,620 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:35:56,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 10] total 28 [2024-11-17 03:35:56,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534802040] [2024-11-17 03:35:56,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:35:56,620 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-17 03:35:56,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:35:56,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-17 03:35:56,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2024-11-17 03:35:57,781 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 58 [2024-11-17 03:35:57,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 137 transitions, 1395 flow. Second operand has 28 states, 28 states have (on average 28.142857142857142) internal successors, (788), 28 states have internal predecessors, (788), 0 states have call successors, (0), 0 states 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 03:35:57,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:35:57,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 58 [2024-11-17 03:35:57,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:36:00,480 INFO L124 PetriNetUnfolderBase]: 11053/19795 cut-off events. [2024-11-17 03:36:00,480 INFO L125 PetriNetUnfolderBase]: For 114444/114967 co-relation queries the response was YES. [2024-11-17 03:36:00,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91134 conditions, 19795 events. 11053/19795 cut-off events. For 114444/114967 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 150909 event pairs, 2217 based on Foata normal form. 275/19967 useless extension candidates. Maximal degree in co-relation 69008. Up to 10680 conditions per place. [2024-11-17 03:36:00,727 INFO L140 encePairwiseOnDemand]: 43/58 looper letters, 218 selfloop transitions, 79 changer transitions 3/322 dead transitions. [2024-11-17 03:36:00,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 322 transitions, 3720 flow [2024-11-17 03:36:00,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-17 03:36:00,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-17 03:36:00,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 596 transitions. [2024-11-17 03:36:00,729 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6044624746450304 [2024-11-17 03:36:00,729 INFO L175 Difference]: Start difference. First operand has 150 places, 137 transitions, 1395 flow. Second operand 17 states and 596 transitions. [2024-11-17 03:36:00,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 322 transitions, 3720 flow [2024-11-17 03:36:00,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 322 transitions, 3643 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-11-17 03:36:00,916 INFO L231 Difference]: Finished difference. Result has 168 places, 201 transitions, 2301 flow [2024-11-17 03:36:00,916 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=1326, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2301, PETRI_PLACES=168, PETRI_TRANSITIONS=201} [2024-11-17 03:36:00,917 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 114 predicate places. [2024-11-17 03:36:00,917 INFO L471 AbstractCegarLoop]: Abstraction has has 168 places, 201 transitions, 2301 flow [2024-11-17 03:36:00,917 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 28.142857142857142) internal successors, (788), 28 states have internal predecessors, (788), 0 states have call successors, (0), 0 states 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 03:36:00,917 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:36:00,918 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:36:00,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-17 03:36:01,118 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:36:01,118 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-17 03:36:01,118 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:36:01,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1934259558, now seen corresponding path program 3 times [2024-11-17 03:36:01,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:36:01,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410267812] [2024-11-17 03:36:01,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:36:01,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:36:01,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:36:01,729 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:36:01,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:36:01,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410267812] [2024-11-17 03:36:01,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410267812] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:36:01,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098611609] [2024-11-17 03:36:01,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-17 03:36:01,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:36:01,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:36:01,732 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 03:36:01,740 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 03:36:01,850 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-17 03:36:01,851 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:36:01,853 INFO L255 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-17 03:36:01,855 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:36:01,880 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-17 03:36:02,180 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-17 03:36:02,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:36:02,292 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:36:02,602 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:36:02,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098611609] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:36:02,603 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:36:02,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 12] total 33 [2024-11-17 03:36:02,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087237144] [2024-11-17 03:36:02,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:36:02,604 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-17 03:36:02,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:36:02,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-17 03:36:02,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=917, Unknown=0, NotChecked=0, Total=1056 [2024-11-17 03:36:04,043 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 58 [2024-11-17 03:36:04,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 201 transitions, 2301 flow. Second operand has 33 states, 33 states have (on average 25.12121212121212) internal successors, (829), 33 states have internal predecessors, (829), 0 states have call successors, (0), 0 states 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 03:36:04,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:36:04,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 58 [2024-11-17 03:36:04,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:36:13,799 INFO L124 PetriNetUnfolderBase]: 29109/47066 cut-off events. [2024-11-17 03:36:13,800 INFO L125 PetriNetUnfolderBase]: For 306975/307205 co-relation queries the response was YES. [2024-11-17 03:36:14,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238732 conditions, 47066 events. 29109/47066 cut-off events. For 306975/307205 co-relation queries the response was YES. Maximal size of possible extension queue 1017. Compared 352343 event pairs, 1549 based on Foata normal form. 5/47064 useless extension candidates. Maximal degree in co-relation 203728. Up to 15173 conditions per place. [2024-11-17 03:36:14,505 INFO L140 encePairwiseOnDemand]: 39/58 looper letters, 728 selfloop transitions, 455 changer transitions 29/1220 dead transitions. [2024-11-17 03:36:14,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 1220 transitions, 14567 flow [2024-11-17 03:36:14,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2024-11-17 03:36:14,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2024-11-17 03:36:14,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 2342 transitions. [2024-11-17 03:36:14,510 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5531412376003779 [2024-11-17 03:36:14,510 INFO L175 Difference]: Start difference. First operand has 168 places, 201 transitions, 2301 flow. Second operand 73 states and 2342 transitions. [2024-11-17 03:36:14,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 1220 transitions, 14567 flow [2024-11-17 03:36:15,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 1220 transitions, 14168 flow, removed 184 selfloop flow, removed 6 redundant places. [2024-11-17 03:36:15,716 INFO L231 Difference]: Finished difference. Result has 266 places, 600 transitions, 8430 flow [2024-11-17 03:36:15,716 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=2154, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=73, PETRI_FLOW=8430, PETRI_PLACES=266, PETRI_TRANSITIONS=600} [2024-11-17 03:36:15,717 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 212 predicate places. [2024-11-17 03:36:15,717 INFO L471 AbstractCegarLoop]: Abstraction has has 266 places, 600 transitions, 8430 flow [2024-11-17 03:36:15,717 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 25.12121212121212) internal successors, (829), 33 states have internal predecessors, (829), 0 states have call successors, (0), 0 states 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 03:36:15,717 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:36:15,717 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:36:15,730 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 03:36:15,918 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:36:15,918 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-17 03:36:15,918 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:36:15,918 INFO L85 PathProgramCache]: Analyzing trace with hash 359887088, now seen corresponding path program 1 times [2024-11-17 03:36:15,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:36:15,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949993683] [2024-11-17 03:36:15,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:36:15,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:36:15,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:36:16,646 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:36:16,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:36:16,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949993683] [2024-11-17 03:36:16,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949993683] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:36:16,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855697770] [2024-11-17 03:36:16,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:36:16,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:36:16,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:36:16,649 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 03:36:16,651 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 03:36:16,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:36:16,741 INFO L255 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-17 03:36:16,743 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:36:16,771 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-17 03:36:17,033 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-17 03:36:17,093 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:36:17,093 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:36:17,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:36:17,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855697770] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:36:17,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:36:17,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 8] total 24 [2024-11-17 03:36:17,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944381460] [2024-11-17 03:36:17,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:36:17,218 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-17 03:36:17,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:36:17,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-17 03:36:17,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2024-11-17 03:36:18,364 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 58 [2024-11-17 03:36:18,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 600 transitions, 8430 flow. Second operand has 24 states, 24 states have (on average 28.458333333333332) internal successors, (683), 24 states have internal predecessors, (683), 0 states have call successors, (0), 0 states 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 03:36:18,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:36:18,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 58 [2024-11-17 03:36:18,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:36:29,286 INFO L124 PetriNetUnfolderBase]: 25776/44587 cut-off events. [2024-11-17 03:36:29,286 INFO L125 PetriNetUnfolderBase]: For 526914/528350 co-relation queries the response was YES. [2024-11-17 03:36:30,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267688 conditions, 44587 events. 25776/44587 cut-off events. For 526914/528350 co-relation queries the response was YES. Maximal size of possible extension queue 1046. Compared 365927 event pairs, 4205 based on Foata normal form. 657/44852 useless extension candidates. Maximal degree in co-relation 266618. Up to 24462 conditions per place. [2024-11-17 03:36:30,559 INFO L140 encePairwiseOnDemand]: 43/58 looper letters, 534 selfloop transitions, 178 changer transitions 24/790 dead transitions. [2024-11-17 03:36:30,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 790 transitions, 11884 flow [2024-11-17 03:36:30,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-17 03:36:30,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-17 03:36:30,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 582 transitions. [2024-11-17 03:36:30,561 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6271551724137931 [2024-11-17 03:36:30,561 INFO L175 Difference]: Start difference. First operand has 266 places, 600 transitions, 8430 flow. Second operand 16 states and 582 transitions. [2024-11-17 03:36:30,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 790 transitions, 11884 flow