./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-simple-array-sum.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/popl20-simple-array-sum.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 0c7c5c48eda3eba87519854c38b7495ee97c35417d2a6e287791b53fe49d6c07 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-17 03:41:14,660 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-17 03:41:14,736 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-17 03:41:14,741 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-17 03:41:14,742 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-17 03:41:14,775 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-17 03:41:14,776 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-17 03:41:14,776 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-17 03:41:14,777 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-17 03:41:14,777 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-17 03:41:14,777 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-17 03:41:14,778 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-17 03:41:14,778 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-17 03:41:14,792 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-17 03:41:14,792 INFO L153 SettingsManager]: * Use SBE=true [2024-11-17 03:41:14,793 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-17 03:41:14,793 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-17 03:41:14,794 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-17 03:41:14,794 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-17 03:41:14,794 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-17 03:41:14,794 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-17 03:41:14,795 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-17 03:41:14,796 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-17 03:41:14,796 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-17 03:41:14,796 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-17 03:41:14,797 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-17 03:41:14,797 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-17 03:41:14,797 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-17 03:41:14,797 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-17 03:41:14,798 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-17 03:41:14,798 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-17 03:41:14,798 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-17 03:41:14,798 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-17 03:41:14,799 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:41:14,799 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-17 03:41:14,799 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-17 03:41:14,800 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-17 03:41:14,800 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-17 03:41:14,800 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-17 03:41:14,801 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-17 03:41:14,801 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-17 03:41:14,801 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-17 03:41:14,802 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0c7c5c48eda3eba87519854c38b7495ee97c35417d2a6e287791b53fe49d6c07 [2024-11-17 03:41:15,065 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-17 03:41:15,091 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-17 03:41:15,094 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-17 03:41:15,095 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-17 03:41:15,095 INFO L274 PluginConnector]: CDTParser initialized [2024-11-17 03:41:15,096 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c [2024-11-17 03:41:16,521 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-17 03:41:16,722 INFO L384 CDTParser]: Found 1 translation units. [2024-11-17 03:41:16,722 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c [2024-11-17 03:41:16,730 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f962cc2ad/05ec1d08addc4b46ace2fe9ad8a53e1e/FLAGcefe8dd2d [2024-11-17 03:41:16,747 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f962cc2ad/05ec1d08addc4b46ace2fe9ad8a53e1e [2024-11-17 03:41:16,750 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-17 03:41:16,754 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-17 03:41:16,756 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-17 03:41:16,756 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-17 03:41:16,763 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-17 03:41:16,764 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:41:16" (1/1) ... [2024-11-17 03:41:16,765 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b1b0ef5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:41:16, skipping insertion in model container [2024-11-17 03:41:16,765 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:41:16" (1/1) ... [2024-11-17 03:41:16,786 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-17 03:41:16,979 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 03:41:16,982 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:41:16,990 INFO L200 MainTranslator]: Completed pre-run [2024-11-17 03:41:17,029 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:41:17,044 INFO L204 MainTranslator]: Completed translation [2024-11-17 03:41:17,045 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:41:17 WrapperNode [2024-11-17 03:41:17,045 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-17 03:41:17,046 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-17 03:41:17,046 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-17 03:41:17,046 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-17 03:41:17,051 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:41:17" (1/1) ... [2024-11-17 03:41:17,068 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:41:17" (1/1) ... [2024-11-17 03:41:17,086 INFO L138 Inliner]: procedures = 23, calls = 21, calls flagged for inlining = 8, calls inlined = 10, statements flattened = 109 [2024-11-17 03:41:17,086 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-17 03:41:17,087 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-17 03:41:17,087 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-17 03:41:17,087 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-17 03:41:17,098 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:41:17" (1/1) ... [2024-11-17 03:41:17,098 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:41:17" (1/1) ... [2024-11-17 03:41:17,101 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:41:17" (1/1) ... [2024-11-17 03:41:17,115 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-11-17 03:41:17,115 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:41:17" (1/1) ... [2024-11-17 03:41:17,116 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:41:17" (1/1) ... [2024-11-17 03:41:17,125 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:41:17" (1/1) ... [2024-11-17 03:41:17,126 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:41:17" (1/1) ... [2024-11-17 03:41:17,128 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:41:17" (1/1) ... [2024-11-17 03:41:17,129 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:41:17" (1/1) ... [2024-11-17 03:41:17,137 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-17 03:41:17,138 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-17 03:41:17,138 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-17 03:41:17,139 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-17 03:41:17,139 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:41:17" (1/1) ... [2024-11-17 03:41:17,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:41:17,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:41:17,175 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 03:41:17,178 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 03:41:17,233 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-17 03:41:17,233 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-17 03:41:17,233 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-17 03:41:17,233 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-17 03:41:17,234 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-17 03:41:17,234 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-17 03:41:17,234 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-17 03:41:17,234 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-17 03:41:17,234 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-17 03:41:17,234 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-17 03:41:17,235 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-17 03:41:17,235 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-17 03:41:17,235 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-17 03:41:17,235 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-17 03:41:17,235 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-17 03:41:17,235 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-17 03:41:17,237 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 03:41:17,374 INFO L256 CfgBuilder]: Building ICFG [2024-11-17 03:41:17,377 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-17 03:41:17,729 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-17 03:41:17,729 INFO L307 CfgBuilder]: Performing block encoding [2024-11-17 03:41:17,940 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-17 03:41:17,941 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-17 03:41:17,941 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:41:17 BoogieIcfgContainer [2024-11-17 03:41:17,942 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-17 03:41:17,944 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-17 03:41:17,944 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-17 03:41:17,948 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-17 03:41:17,949 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:41:16" (1/3) ... [2024-11-17 03:41:17,950 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a0f444c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:41:17, skipping insertion in model container [2024-11-17 03:41:17,950 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:41:17" (2/3) ... [2024-11-17 03:41:17,951 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a0f444c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:41:17, skipping insertion in model container [2024-11-17 03:41:17,951 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:41:17" (3/3) ... [2024-11-17 03:41:17,955 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-simple-array-sum.wvr.c [2024-11-17 03:41:17,976 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-17 03:41:17,977 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2024-11-17 03:41:17,977 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-17 03:41:18,047 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-17 03:41:18,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 71 places, 72 transitions, 165 flow [2024-11-17 03:41:18,111 INFO L124 PetriNetUnfolderBase]: 11/69 cut-off events. [2024-11-17 03:41:18,111 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-17 03:41:18,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 69 events. 11/69 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 152 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 50. Up to 3 conditions per place. [2024-11-17 03:41:18,115 INFO L82 GeneralOperation]: Start removeDead. Operand has 71 places, 72 transitions, 165 flow [2024-11-17 03:41:18,119 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 67 places, 68 transitions, 154 flow [2024-11-17 03:41:18,127 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-17 03:41:18,135 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;@5adcb64f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-17 03:41:18,135 INFO L334 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2024-11-17 03:41:18,140 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-17 03:41:18,140 INFO L124 PetriNetUnfolderBase]: 2/7 cut-off events. [2024-11-17 03:41:18,140 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-17 03:41:18,142 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:41:18,143 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:41:18,143 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-17 03:41:18,149 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:41:18,149 INFO L85 PathProgramCache]: Analyzing trace with hash 14221954, now seen corresponding path program 1 times [2024-11-17 03:41:18,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:41:18,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862711879] [2024-11-17 03:41:18,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:41:18,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:41:18,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:41:18,443 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 03:41:18,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:41:18,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862711879] [2024-11-17 03:41:18,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862711879] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:41:18,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:41:18,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-17 03:41:18,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953383604] [2024-11-17 03:41:18,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:41:18,457 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:41:18,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:41:18,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:41:18,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:41:18,506 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 72 [2024-11-17 03:41:18,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 68 transitions, 154 flow. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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 03:41:18,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:41:18,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 72 [2024-11-17 03:41:18,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:41:19,134 INFO L124 PetriNetUnfolderBase]: 2574/4030 cut-off events. [2024-11-17 03:41:19,134 INFO L125 PetriNetUnfolderBase]: For 232/232 co-relation queries the response was YES. [2024-11-17 03:41:19,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7805 conditions, 4030 events. 2574/4030 cut-off events. For 232/232 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 26390 event pairs, 2104 based on Foata normal form. 399/3164 useless extension candidates. Maximal degree in co-relation 7245. Up to 3553 conditions per place. [2024-11-17 03:41:19,174 INFO L140 encePairwiseOnDemand]: 62/72 looper letters, 38 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2024-11-17 03:41:19,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 59 transitions, 216 flow [2024-11-17 03:41:19,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:41:19,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:41:19,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 117 transitions. [2024-11-17 03:41:19,187 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-11-17 03:41:19,189 INFO L175 Difference]: Start difference. First operand has 67 places, 68 transitions, 154 flow. Second operand 3 states and 117 transitions. [2024-11-17 03:41:19,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 59 transitions, 216 flow [2024-11-17 03:41:19,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 59 transitions, 204 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-17 03:41:19,204 INFO L231 Difference]: Finished difference. Result has 59 places, 59 transitions, 128 flow [2024-11-17 03:41:19,206 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=59, PETRI_TRANSITIONS=59} [2024-11-17 03:41:19,212 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, -8 predicate places. [2024-11-17 03:41:19,212 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 59 transitions, 128 flow [2024-11-17 03:41:19,212 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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 03:41:19,213 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:41:19,213 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:41:19,214 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-17 03:41:19,214 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-17 03:41:19,215 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:41:19,216 INFO L85 PathProgramCache]: Analyzing trace with hash 14221955, now seen corresponding path program 1 times [2024-11-17 03:41:19,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:41:19,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961186841] [2024-11-17 03:41:19,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:41:19,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:41:19,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:41:19,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:41:19,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:41:19,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961186841] [2024-11-17 03:41:19,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961186841] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:41:19,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:41:19,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:41:19,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131209993] [2024-11-17 03:41:19,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:41:19,544 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:41:19,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:41:19,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:41:19,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:41:19,580 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 72 [2024-11-17 03:41:19,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 59 transitions, 128 flow. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 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 03:41:19,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:41:19,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 72 [2024-11-17 03:41:19,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:41:20,038 INFO L124 PetriNetUnfolderBase]: 2575/4035 cut-off events. [2024-11-17 03:41:20,039 INFO L125 PetriNetUnfolderBase]: For 66/66 co-relation queries the response was YES. [2024-11-17 03:41:20,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7670 conditions, 4035 events. 2575/4035 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 26538 event pairs, 2104 based on Foata normal form. 0/2768 useless extension candidates. Maximal degree in co-relation 7635. Up to 3562 conditions per place. [2024-11-17 03:41:20,065 INFO L140 encePairwiseOnDemand]: 67/72 looper letters, 41 selfloop transitions, 4 changer transitions 0/62 dead transitions. [2024-11-17 03:41:20,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 62 transitions, 224 flow [2024-11-17 03:41:20,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:41:20,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:41:20,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 138 transitions. [2024-11-17 03:41:20,069 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2024-11-17 03:41:20,069 INFO L175 Difference]: Start difference. First operand has 59 places, 59 transitions, 128 flow. Second operand 4 states and 138 transitions. [2024-11-17 03:41:20,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 62 transitions, 224 flow [2024-11-17 03:41:20,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 62 transitions, 220 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:41:20,072 INFO L231 Difference]: Finished difference. Result has 62 places, 62 transitions, 151 flow [2024-11-17 03:41:20,073 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=151, PETRI_PLACES=62, PETRI_TRANSITIONS=62} [2024-11-17 03:41:20,073 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, -5 predicate places. [2024-11-17 03:41:20,074 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 62 transitions, 151 flow [2024-11-17 03:41:20,074 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 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 03:41:20,074 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:41:20,074 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-11-17 03:41:20,075 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-17 03:41:20,076 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-17 03:41:20,077 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:41:20,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1515042386, now seen corresponding path program 1 times [2024-11-17 03:41:20,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:41:20,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983037656] [2024-11-17 03:41:20,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:41:20,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:41:20,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:41:20,354 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 03:41:20,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:41:20,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983037656] [2024-11-17 03:41:20,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983037656] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:41:20,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905317521] [2024-11-17 03:41:20,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:41:20,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:41:20,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:41:20,358 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 03:41:20,359 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 03:41:20,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:41:20,429 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-17 03:41:20,434 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:41:20,513 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 03:41:20,686 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 03:41:20,686 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:41:20,800 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 03:41:20,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905317521] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:41:20,801 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:41:20,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-17 03:41:20,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375444505] [2024-11-17 03:41:20,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:41:20,802 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-17 03:41:20,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:41:20,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-17 03:41:20,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-11-17 03:41:20,899 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 72 [2024-11-17 03:41:20,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 62 transitions, 151 flow. Second operand has 11 states, 11 states have (on average 22.363636363636363) internal successors, (246), 11 states have internal predecessors, (246), 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 03:41:20,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:41:20,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 72 [2024-11-17 03:41:20,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:41:21,641 INFO L124 PetriNetUnfolderBase]: 2576/4039 cut-off events. [2024-11-17 03:41:21,641 INFO L125 PetriNetUnfolderBase]: For 70/70 co-relation queries the response was YES. [2024-11-17 03:41:21,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7693 conditions, 4039 events. 2576/4039 cut-off events. For 70/70 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 26431 event pairs, 2104 based on Foata normal form. 0/2772 useless extension candidates. Maximal degree in co-relation 7656. Up to 3559 conditions per place. [2024-11-17 03:41:21,665 INFO L140 encePairwiseOnDemand]: 65/72 looper letters, 39 selfloop transitions, 12 changer transitions 0/66 dead transitions. [2024-11-17 03:41:21,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 66 transitions, 265 flow [2024-11-17 03:41:21,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-17 03:41:21,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-17 03:41:21,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 242 transitions. [2024-11-17 03:41:21,671 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3734567901234568 [2024-11-17 03:41:21,672 INFO L175 Difference]: Start difference. First operand has 62 places, 62 transitions, 151 flow. Second operand 9 states and 242 transitions. [2024-11-17 03:41:21,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 66 transitions, 265 flow [2024-11-17 03:41:21,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 66 transitions, 262 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 03:41:21,675 INFO L231 Difference]: Finished difference. Result has 68 places, 64 transitions, 180 flow [2024-11-17 03:41:21,675 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=180, PETRI_PLACES=68, PETRI_TRANSITIONS=64} [2024-11-17 03:41:21,675 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 1 predicate places. [2024-11-17 03:41:21,676 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 64 transitions, 180 flow [2024-11-17 03:41:21,676 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 22.363636363636363) internal successors, (246), 11 states have internal predecessors, (246), 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 03:41:21,676 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:41:21,676 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:41:21,694 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 03:41:21,880 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 03:41:21,880 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-17 03:41:21,881 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:41:21,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1516405754, now seen corresponding path program 1 times [2024-11-17 03:41:21,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:41:21,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598969051] [2024-11-17 03:41:21,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:41:21,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:41:21,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:41:21,981 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 03:41:21,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:41:21,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598969051] [2024-11-17 03:41:21,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598969051] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:41:21,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:41:21,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-17 03:41:21,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151834097] [2024-11-17 03:41:21,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:41:21,983 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:41:21,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:41:21,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:41:21,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:41:22,019 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 72 [2024-11-17 03:41:22,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 64 transitions, 180 flow. Second operand has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 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 03:41:22,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:41:22,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 72 [2024-11-17 03:41:22,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:41:22,631 INFO L124 PetriNetUnfolderBase]: 5148/8064 cut-off events. [2024-11-17 03:41:22,631 INFO L125 PetriNetUnfolderBase]: For 148/148 co-relation queries the response was YES. [2024-11-17 03:41:22,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15353 conditions, 8064 events. 5148/8064 cut-off events. For 148/148 co-relation queries the response was YES. Maximal size of possible extension queue 641. Compared 56850 event pairs, 4208 based on Foata normal form. 1/5549 useless extension candidates. Maximal degree in co-relation 7667. Up to 3564 conditions per place. [2024-11-17 03:41:22,749 INFO L140 encePairwiseOnDemand]: 64/72 looper letters, 79 selfloop transitions, 8 changer transitions 0/103 dead transitions. [2024-11-17 03:41:22,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 103 transitions, 444 flow [2024-11-17 03:41:22,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:41:22,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:41:22,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 200 transitions. [2024-11-17 03:41:22,752 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-11-17 03:41:22,752 INFO L175 Difference]: Start difference. First operand has 68 places, 64 transitions, 180 flow. Second operand 5 states and 200 transitions. [2024-11-17 03:41:22,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 103 transitions, 444 flow [2024-11-17 03:41:22,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 103 transitions, 402 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-11-17 03:41:22,757 INFO L231 Difference]: Finished difference. Result has 67 places, 68 transitions, 188 flow [2024-11-17 03:41:22,757 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=188, PETRI_PLACES=67, PETRI_TRANSITIONS=68} [2024-11-17 03:41:22,758 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 0 predicate places. [2024-11-17 03:41:22,759 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 68 transitions, 188 flow [2024-11-17 03:41:22,759 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 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 03:41:22,759 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:41:22,759 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:41:22,760 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-17 03:41:22,760 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-17 03:41:22,760 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:41:22,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1182687483, now seen corresponding path program 1 times [2024-11-17 03:41:22,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:41:22,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998787393] [2024-11-17 03:41:22,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:41:22,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:41:22,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:41:22,957 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 03:41:22,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:41:22,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998787393] [2024-11-17 03:41:22,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998787393] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:41:22,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966237625] [2024-11-17 03:41:22,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:41:22,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:41:22,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:41:22,960 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 03:41:22,962 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 03:41:23,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:41:23,021 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-17 03:41:23,022 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:41:23,034 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 03:41:23,172 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-17 03:41:23,172 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2024-11-17 03:41:23,208 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 03:41:23,209 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:41:23,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:41:23,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966237625] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-17 03:41:23,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-17 03:41:23,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6, 3] total 11 [2024-11-17 03:41:23,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440391771] [2024-11-17 03:41:23,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:41:23,311 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:41:23,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:41:23,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:41:23,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-11-17 03:41:23,358 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 72 [2024-11-17 03:41:23,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 68 transitions, 188 flow. Second operand has 5 states, 5 states have (on average 24.2) internal successors, (121), 5 states have internal predecessors, (121), 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 03:41:23,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:41:23,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 72 [2024-11-17 03:41:23,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:41:24,536 INFO L124 PetriNetUnfolderBase]: 7719/12081 cut-off events. [2024-11-17 03:41:24,537 INFO L125 PetriNetUnfolderBase]: For 211/211 co-relation queries the response was YES. [2024-11-17 03:41:24,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22985 conditions, 12081 events. 7719/12081 cut-off events. For 211/211 co-relation queries the response was YES. Maximal size of possible extension queue 958. Compared 91324 event pairs, 6312 based on Foata normal form. 1/8315 useless extension candidates. Maximal degree in co-relation 7649. Up to 7113 conditions per place. [2024-11-17 03:41:24,605 INFO L140 encePairwiseOnDemand]: 66/72 looper letters, 77 selfloop transitions, 7 changer transitions 0/103 dead transitions. [2024-11-17 03:41:24,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 103 transitions, 437 flow [2024-11-17 03:41:24,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:41:24,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:41:24,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 197 transitions. [2024-11-17 03:41:24,607 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5472222222222223 [2024-11-17 03:41:24,607 INFO L175 Difference]: Start difference. First operand has 67 places, 68 transitions, 188 flow. Second operand 5 states and 197 transitions. [2024-11-17 03:41:24,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 103 transitions, 437 flow [2024-11-17 03:41:24,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 103 transitions, 432 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 03:41:24,610 INFO L231 Difference]: Finished difference. Result has 71 places, 69 transitions, 208 flow [2024-11-17 03:41:24,611 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=208, PETRI_PLACES=71, PETRI_TRANSITIONS=69} [2024-11-17 03:41:24,611 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 4 predicate places. [2024-11-17 03:41:24,611 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 69 transitions, 208 flow [2024-11-17 03:41:24,612 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.2) internal successors, (121), 5 states have internal predecessors, (121), 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 03:41:24,612 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:41:24,612 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:41:24,634 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 03:41:24,816 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:41:24,817 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-17 03:41:24,818 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:41:24,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1738418837, now seen corresponding path program 1 times [2024-11-17 03:41:24,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:41:24,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023314831] [2024-11-17 03:41:24,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:41:24,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:41:24,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:41:24,894 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 03:41:24,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:41:24,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023314831] [2024-11-17 03:41:24,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023314831] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:41:24,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:41:24,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-17 03:41:24,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624910693] [2024-11-17 03:41:24,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:41:24,895 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:41:24,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:41:24,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:41:24,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:41:24,923 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 72 [2024-11-17 03:41:24,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 69 transitions, 208 flow. Second operand has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 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 03:41:24,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:41:24,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 72 [2024-11-17 03:41:24,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:41:25,690 INFO L124 PetriNetUnfolderBase]: 5351/8516 cut-off events. [2024-11-17 03:41:25,690 INFO L125 PetriNetUnfolderBase]: For 171/171 co-relation queries the response was YES. [2024-11-17 03:41:25,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16285 conditions, 8516 events. 5351/8516 cut-off events. For 171/171 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 59845 event pairs, 3396 based on Foata normal form. 324/6527 useless extension candidates. Maximal degree in co-relation 8836. Up to 4118 conditions per place. [2024-11-17 03:41:25,744 INFO L140 encePairwiseOnDemand]: 62/72 looper letters, 96 selfloop transitions, 11 changer transitions 0/122 dead transitions. [2024-11-17 03:41:25,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 122 transitions, 540 flow [2024-11-17 03:41:25,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 03:41:25,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 03:41:25,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 236 transitions. [2024-11-17 03:41:25,746 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5462962962962963 [2024-11-17 03:41:25,746 INFO L175 Difference]: Start difference. First operand has 71 places, 69 transitions, 208 flow. Second operand 6 states and 236 transitions. [2024-11-17 03:41:25,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 122 transitions, 540 flow [2024-11-17 03:41:25,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 122 transitions, 533 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:41:25,750 INFO L231 Difference]: Finished difference. Result has 76 places, 71 transitions, 239 flow [2024-11-17 03:41:25,750 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=239, PETRI_PLACES=76, PETRI_TRANSITIONS=71} [2024-11-17 03:41:25,751 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 9 predicate places. [2024-11-17 03:41:25,751 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 71 transitions, 239 flow [2024-11-17 03:41:25,752 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 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 03:41:25,752 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:41:25,752 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:41:25,752 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-17 03:41:25,752 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-17 03:41:25,753 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:41:25,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1826542496, now seen corresponding path program 1 times [2024-11-17 03:41:25,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:41:25,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350585245] [2024-11-17 03:41:25,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:41:25,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:41:25,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:41:25,863 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 03:41:25,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:41:25,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350585245] [2024-11-17 03:41:25,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350585245] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:41:25,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063493347] [2024-11-17 03:41:25,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:41:25,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:41:25,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:41:25,866 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 03:41:25,868 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 03:41:25,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:41:25,937 INFO L255 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-17 03:41:25,938 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:41:26,029 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 03:41:26,031 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:41:26,116 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 03:41:26,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063493347] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:41:26,117 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:41:26,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-17 03:41:26,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521472177] [2024-11-17 03:41:26,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:41:26,118 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-17 03:41:26,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:41:26,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-17 03:41:26,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2024-11-17 03:41:26,251 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 72 [2024-11-17 03:41:26,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 71 transitions, 239 flow. Second operand has 14 states, 14 states have (on average 24.642857142857142) internal successors, (345), 14 states have internal predecessors, (345), 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 03:41:26,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:41:26,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 72 [2024-11-17 03:41:26,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:41:27,208 INFO L124 PetriNetUnfolderBase]: 6287/9978 cut-off events. [2024-11-17 03:41:27,208 INFO L125 PetriNetUnfolderBase]: For 1835/2017 co-relation queries the response was YES. [2024-11-17 03:41:27,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20452 conditions, 9978 events. 6287/9978 cut-off events. For 1835/2017 co-relation queries the response was YES. Maximal size of possible extension queue 659. Compared 72299 event pairs, 5244 based on Foata normal form. 1/7045 useless extension candidates. Maximal degree in co-relation 7992. Up to 5282 conditions per place. [2024-11-17 03:41:27,259 INFO L140 encePairwiseOnDemand]: 63/72 looper letters, 76 selfloop transitions, 24 changer transitions 0/116 dead transitions. [2024-11-17 03:41:27,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 116 transitions, 571 flow [2024-11-17 03:41:27,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-17 03:41:27,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-17 03:41:27,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 351 transitions. [2024-11-17 03:41:27,262 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-11-17 03:41:27,262 INFO L175 Difference]: Start difference. First operand has 76 places, 71 transitions, 239 flow. Second operand 11 states and 351 transitions. [2024-11-17 03:41:27,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 116 transitions, 571 flow [2024-11-17 03:41:27,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 116 transitions, 551 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-17 03:41:27,290 INFO L231 Difference]: Finished difference. Result has 86 places, 80 transitions, 337 flow [2024-11-17 03:41:27,293 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=337, PETRI_PLACES=86, PETRI_TRANSITIONS=80} [2024-11-17 03:41:27,294 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 19 predicate places. [2024-11-17 03:41:27,296 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 80 transitions, 337 flow [2024-11-17 03:41:27,297 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 24.642857142857142) internal successors, (345), 14 states have internal predecessors, (345), 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 03:41:27,297 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:41:27,297 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:41:27,315 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 03:41:27,501 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:41:27,502 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-17 03:41:27,502 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:41:27,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1617939536, now seen corresponding path program 1 times [2024-11-17 03:41:27,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:41:27,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137010303] [2024-11-17 03:41:27,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:41:27,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:41:27,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:41:27,603 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 03:41:27,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:41:27,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137010303] [2024-11-17 03:41:27,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137010303] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:41:27,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:41:27,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:41:27,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762227506] [2024-11-17 03:41:27,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:41:27,605 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:41:27,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:41:27,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:41:27,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:41:27,619 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 72 [2024-11-17 03:41:27,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 80 transitions, 337 flow. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 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 03:41:27,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:41:27,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 72 [2024-11-17 03:41:27,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:41:28,244 INFO L124 PetriNetUnfolderBase]: 4900/7886 cut-off events. [2024-11-17 03:41:28,244 INFO L125 PetriNetUnfolderBase]: For 1670/1714 co-relation queries the response was YES. [2024-11-17 03:41:28,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16412 conditions, 7886 events. 4900/7886 cut-off events. For 1670/1714 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 55509 event pairs, 4060 based on Foata normal form. 0/5910 useless extension candidates. Maximal degree in co-relation 6194. Up to 6964 conditions per place. [2024-11-17 03:41:28,280 INFO L140 encePairwiseOnDemand]: 67/72 looper letters, 45 selfloop transitions, 9 changer transitions 0/78 dead transitions. [2024-11-17 03:41:28,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 78 transitions, 441 flow [2024-11-17 03:41:28,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:41:28,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:41:28,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 155 transitions. [2024-11-17 03:41:28,281 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4305555555555556 [2024-11-17 03:41:28,281 INFO L175 Difference]: Start difference. First operand has 86 places, 80 transitions, 337 flow. Second operand 5 states and 155 transitions. [2024-11-17 03:41:28,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 78 transitions, 441 flow [2024-11-17 03:41:28,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 78 transitions, 407 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-11-17 03:41:28,308 INFO L231 Difference]: Finished difference. Result has 86 places, 78 transitions, 317 flow [2024-11-17 03:41:28,309 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=299, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=317, PETRI_PLACES=86, PETRI_TRANSITIONS=78} [2024-11-17 03:41:28,310 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 19 predicate places. [2024-11-17 03:41:28,311 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 78 transitions, 317 flow [2024-11-17 03:41:28,311 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 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 03:41:28,311 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:41:28,311 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:41:28,311 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-17 03:41:28,311 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-17 03:41:28,312 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:41:28,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1617939535, now seen corresponding path program 1 times [2024-11-17 03:41:28,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:41:28,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331235079] [2024-11-17 03:41:28,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:41:28,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:41:28,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:41:28,376 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 03:41:28,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:41:28,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331235079] [2024-11-17 03:41:28,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331235079] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:41:28,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:41:28,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-17 03:41:28,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66140426] [2024-11-17 03:41:28,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:41:28,378 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:41:28,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:41:28,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:41:28,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:41:28,401 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 72 [2024-11-17 03:41:28,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 78 transitions, 317 flow. Second operand has 5 states, 5 states have (on average 24.2) internal successors, (121), 5 states have internal predecessors, (121), 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 03:41:28,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:41:28,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 72 [2024-11-17 03:41:28,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:41:28,980 INFO L124 PetriNetUnfolderBase]: 4615/7260 cut-off events. [2024-11-17 03:41:28,981 INFO L125 PetriNetUnfolderBase]: For 1177/1497 co-relation queries the response was YES. [2024-11-17 03:41:28,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14836 conditions, 7260 events. 4615/7260 cut-off events. For 1177/1497 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 48227 event pairs, 3668 based on Foata normal form. 55/5611 useless extension candidates. Maximal degree in co-relation 6697. Up to 6014 conditions per place. [2024-11-17 03:41:29,014 INFO L140 encePairwiseOnDemand]: 62/72 looper letters, 84 selfloop transitions, 13 changer transitions 0/112 dead transitions. [2024-11-17 03:41:29,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 112 transitions, 607 flow [2024-11-17 03:41:29,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 03:41:29,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 03:41:29,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 217 transitions. [2024-11-17 03:41:29,017 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5023148148148148 [2024-11-17 03:41:29,017 INFO L175 Difference]: Start difference. First operand has 86 places, 78 transitions, 317 flow. Second operand 6 states and 217 transitions. [2024-11-17 03:41:29,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 112 transitions, 607 flow [2024-11-17 03:41:29,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 112 transitions, 594 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-17 03:41:29,023 INFO L231 Difference]: Finished difference. Result has 90 places, 80 transitions, 346 flow [2024-11-17 03:41:29,024 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=346, PETRI_PLACES=90, PETRI_TRANSITIONS=80} [2024-11-17 03:41:29,024 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 23 predicate places. [2024-11-17 03:41:29,025 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 80 transitions, 346 flow [2024-11-17 03:41:29,025 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.2) internal successors, (121), 5 states have internal predecessors, (121), 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 03:41:29,025 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:41:29,025 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-11-17 03:41:29,025 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-17 03:41:29,026 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-17 03:41:29,026 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:41:29,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1831113515, now seen corresponding path program 2 times [2024-11-17 03:41:29,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:41:29,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686375350] [2024-11-17 03:41:29,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:41:29,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:41:29,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:41:29,323 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 03:41:29,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:41:29,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686375350] [2024-11-17 03:41:29,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686375350] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:41:29,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595478646] [2024-11-17 03:41:29,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 03:41:29,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:41:29,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:41:29,326 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 03:41:29,328 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 03:41:29,405 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-17 03:41:29,405 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:41:29,406 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-17 03:41:29,408 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:41:29,485 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 03:41:29,655 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-17 03:41:29,656 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:41:29,853 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-17 03:41:29,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595478646] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:41:29,853 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:41:29,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 4] total 16 [2024-11-17 03:41:29,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598402607] [2024-11-17 03:41:29,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:41:29,854 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-17 03:41:29,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:41:29,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-17 03:41:29,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2024-11-17 03:41:30,280 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 72 [2024-11-17 03:41:30,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 80 transitions, 346 flow. Second operand has 18 states, 18 states have (on average 22.61111111111111) internal successors, (407), 18 states have internal predecessors, (407), 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 03:41:30,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:41:30,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 72 [2024-11-17 03:41:30,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:41:31,882 INFO L124 PetriNetUnfolderBase]: 6078/9811 cut-off events. [2024-11-17 03:41:31,882 INFO L125 PetriNetUnfolderBase]: For 2339/2785 co-relation queries the response was YES. [2024-11-17 03:41:31,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20743 conditions, 9811 events. 6078/9811 cut-off events. For 2339/2785 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 70519 event pairs, 4978 based on Foata normal form. 7/7557 useless extension candidates. Maximal degree in co-relation 6866. Up to 5889 conditions per place. [2024-11-17 03:41:31,934 INFO L140 encePairwiseOnDemand]: 62/72 looper letters, 79 selfloop transitions, 33 changer transitions 0/127 dead transitions. [2024-11-17 03:41:31,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 127 transitions, 753 flow [2024-11-17 03:41:31,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-17 03:41:31,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-17 03:41:31,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 445 transitions. [2024-11-17 03:41:31,937 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3862847222222222 [2024-11-17 03:41:31,937 INFO L175 Difference]: Start difference. First operand has 90 places, 80 transitions, 346 flow. Second operand 16 states and 445 transitions. [2024-11-17 03:41:31,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 127 transitions, 753 flow [2024-11-17 03:41:31,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 127 transitions, 722 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-17 03:41:31,961 INFO L231 Difference]: Finished difference. Result has 105 places, 93 transitions, 504 flow [2024-11-17 03:41:31,961 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=504, PETRI_PLACES=105, PETRI_TRANSITIONS=93} [2024-11-17 03:41:31,962 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 38 predicate places. [2024-11-17 03:41:31,962 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 93 transitions, 504 flow [2024-11-17 03:41:31,962 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 22.61111111111111) internal successors, (407), 18 states have internal predecessors, (407), 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 03:41:31,962 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:41:31,963 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:41:31,975 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 03:41:32,163 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:41:32,163 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-17 03:41:32,164 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:41:32,164 INFO L85 PathProgramCache]: Analyzing trace with hash 425087046, now seen corresponding path program 1 times [2024-11-17 03:41:32,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:41:32,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225332760] [2024-11-17 03:41:32,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:41:32,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:41:32,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:41:32,219 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 03:41:32,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:41:32,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225332760] [2024-11-17 03:41:32,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225332760] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:41:32,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:41:32,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-17 03:41:32,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724252840] [2024-11-17 03:41:32,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:41:32,221 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:41:32,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:41:32,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:41:32,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:41:32,230 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 72 [2024-11-17 03:41:32,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 93 transitions, 504 flow. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 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 03:41:32,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:41:32,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 72 [2024-11-17 03:41:32,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:41:33,229 INFO L124 PetriNetUnfolderBase]: 8307/13739 cut-off events. [2024-11-17 03:41:33,229 INFO L125 PetriNetUnfolderBase]: For 2595/3258 co-relation queries the response was YES. [2024-11-17 03:41:33,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28052 conditions, 13739 events. 8307/13739 cut-off events. For 2595/3258 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 100649 event pairs, 1948 based on Foata normal form. 289/11070 useless extension candidates. Maximal degree in co-relation 18979. Up to 8200 conditions per place. [2024-11-17 03:41:33,318 INFO L140 encePairwiseOnDemand]: 68/72 looper letters, 106 selfloop transitions, 4 changer transitions 0/134 dead transitions. [2024-11-17 03:41:33,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 134 transitions, 842 flow [2024-11-17 03:41:33,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:41:33,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:41:33,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 173 transitions. [2024-11-17 03:41:33,319 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6006944444444444 [2024-11-17 03:41:33,319 INFO L175 Difference]: Start difference. First operand has 105 places, 93 transitions, 504 flow. Second operand 4 states and 173 transitions. [2024-11-17 03:41:33,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 134 transitions, 842 flow [2024-11-17 03:41:33,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 134 transitions, 827 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-11-17 03:41:33,331 INFO L231 Difference]: Finished difference. Result has 108 places, 96 transitions, 514 flow [2024-11-17 03:41:33,331 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=489, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=514, PETRI_PLACES=108, PETRI_TRANSITIONS=96} [2024-11-17 03:41:33,332 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 41 predicate places. [2024-11-17 03:41:33,332 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 96 transitions, 514 flow [2024-11-17 03:41:33,332 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 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 03:41:33,332 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:41:33,332 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:41:33,333 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-17 03:41:33,333 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-17 03:41:33,333 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:41:33,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1373032942, now seen corresponding path program 1 times [2024-11-17 03:41:33,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:41:33,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575394834] [2024-11-17 03:41:33,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:41:33,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:41:33,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:41:33,508 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 03:41:33,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:41:33,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575394834] [2024-11-17 03:41:33,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575394834] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:41:33,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880144281] [2024-11-17 03:41:33,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:41:33,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:41:33,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:41:33,511 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 03:41:33,513 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 03:41:33,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:41:33,588 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-17 03:41:33,591 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:41:33,602 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 03:41:33,613 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-17 03:41:33,719 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-17 03:41:33,720 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 28 [2024-11-17 03:41:33,747 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-17 03:41:33,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-17 03:41:34,022 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 03:41:34,023 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:41:34,392 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 03:41:34,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880144281] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-17 03:41:34,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-17 03:41:34,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 12 [2024-11-17 03:41:34,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401587831] [2024-11-17 03:41:34,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:41:34,395 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-17 03:41:34,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:41:34,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-17 03:41:34,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-11-17 03:41:34,519 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 72 [2024-11-17 03:41:34,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 96 transitions, 514 flow. Second operand has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 6 states have internal predecessors, (160), 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 03:41:34,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:41:34,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 72 [2024-11-17 03:41:34,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:41:35,659 INFO L124 PetriNetUnfolderBase]: 9437/15481 cut-off events. [2024-11-17 03:41:35,660 INFO L125 PetriNetUnfolderBase]: For 4627/5644 co-relation queries the response was YES. [2024-11-17 03:41:35,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33826 conditions, 15481 events. 9437/15481 cut-off events. For 4627/5644 co-relation queries the response was YES. Maximal size of possible extension queue 691. Compared 112720 event pairs, 3973 based on Foata normal form. 0/12281 useless extension candidates. Maximal degree in co-relation 22835. Up to 8500 conditions per place. [2024-11-17 03:41:35,753 INFO L140 encePairwiseOnDemand]: 63/72 looper letters, 92 selfloop transitions, 18 changer transitions 0/135 dead transitions. [2024-11-17 03:41:35,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 135 transitions, 854 flow [2024-11-17 03:41:35,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-17 03:41:35,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-17 03:41:35,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 256 transitions. [2024-11-17 03:41:35,755 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5079365079365079 [2024-11-17 03:41:35,755 INFO L175 Difference]: Start difference. First operand has 108 places, 96 transitions, 514 flow. Second operand 7 states and 256 transitions. [2024-11-17 03:41:35,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 135 transitions, 854 flow [2024-11-17 03:41:35,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 135 transitions, 846 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-11-17 03:41:35,779 INFO L231 Difference]: Finished difference. Result has 116 places, 98 transitions, 570 flow [2024-11-17 03:41:35,779 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=510, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=570, PETRI_PLACES=116, PETRI_TRANSITIONS=98} [2024-11-17 03:41:35,780 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 49 predicate places. [2024-11-17 03:41:35,780 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 98 transitions, 570 flow [2024-11-17 03:41:35,780 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 6 states have internal predecessors, (160), 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 03:41:35,780 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:41:35,780 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:41:35,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-17 03:41:35,980 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-17 03:41:35,981 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-17 03:41:35,981 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:41:35,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1625553623, now seen corresponding path program 1 times [2024-11-17 03:41:35,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:41:35,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639407785] [2024-11-17 03:41:35,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:41:35,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:41:36,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:41:36,215 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 03:41:36,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:41:36,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639407785] [2024-11-17 03:41:36,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639407785] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:41:36,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554442520] [2024-11-17 03:41:36,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:41:36,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:41:36,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:41:36,220 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 03:41:36,222 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 03:41:36,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:41:36,297 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-17 03:41:36,299 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:41:36,314 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 03:41:36,319 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-17 03:41:36,386 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-17 03:41:36,386 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-17 03:41:36,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 24 [2024-11-17 03:41:36,694 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 03:41:36,694 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:41:37,001 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 03:41:37,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554442520] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-17 03:41:37,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-17 03:41:37,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 13 [2024-11-17 03:41:37,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256136887] [2024-11-17 03:41:37,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:41:37,002 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-17 03:41:37,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:41:37,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-17 03:41:37,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2024-11-17 03:41:37,079 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 72 [2024-11-17 03:41:37,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 98 transitions, 570 flow. Second operand has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:41:37,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:41:37,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 72 [2024-11-17 03:41:37,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:41:38,174 INFO L124 PetriNetUnfolderBase]: 9044/14467 cut-off events. [2024-11-17 03:41:38,174 INFO L125 PetriNetUnfolderBase]: For 15720/16938 co-relation queries the response was YES. [2024-11-17 03:41:38,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38162 conditions, 14467 events. 9044/14467 cut-off events. For 15720/16938 co-relation queries the response was YES. Maximal size of possible extension queue 638. Compared 101530 event pairs, 2434 based on Foata normal form. 0/12377 useless extension candidates. Maximal degree in co-relation 25726. Up to 8148 conditions per place. [2024-11-17 03:41:38,234 INFO L140 encePairwiseOnDemand]: 63/72 looper letters, 89 selfloop transitions, 18 changer transitions 0/132 dead transitions. [2024-11-17 03:41:38,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 132 transitions, 906 flow [2024-11-17 03:41:38,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-17 03:41:38,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-17 03:41:38,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 251 transitions. [2024-11-17 03:41:38,236 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.498015873015873 [2024-11-17 03:41:38,236 INFO L175 Difference]: Start difference. First operand has 116 places, 98 transitions, 570 flow. Second operand 7 states and 251 transitions. [2024-11-17 03:41:38,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 132 transitions, 906 flow [2024-11-17 03:41:38,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 132 transitions, 890 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-17 03:41:38,250 INFO L231 Difference]: Finished difference. Result has 121 places, 100 transitions, 616 flow [2024-11-17 03:41:38,250 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=556, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=616, PETRI_PLACES=121, PETRI_TRANSITIONS=100} [2024-11-17 03:41:38,251 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 54 predicate places. [2024-11-17 03:41:38,251 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 100 transitions, 616 flow [2024-11-17 03:41:38,251 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:41:38,251 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:41:38,251 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:41:38,263 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 03:41:38,452 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:41:38,453 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-17 03:41:38,453 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:41:38,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1147444743, now seen corresponding path program 1 times [2024-11-17 03:41:38,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:41:38,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100991495] [2024-11-17 03:41:38,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:41:38,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:41:38,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:41:38,630 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 03:41:38,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:41:38,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100991495] [2024-11-17 03:41:38,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100991495] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:41:38,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242137608] [2024-11-17 03:41:38,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:41:38,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:41:38,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:41:38,632 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 03:41:38,633 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 03:41:38,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:41:38,700 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-17 03:41:38,701 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:41:38,783 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 03:41:38,783 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:41:38,830 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 03:41:38,846 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 03:41:38,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242137608] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:41:38,847 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:41:38,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2024-11-17 03:41:38,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078414777] [2024-11-17 03:41:38,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:41:38,847 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-17 03:41:38,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:41:38,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-17 03:41:38,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-11-17 03:41:38,954 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 72 [2024-11-17 03:41:38,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 100 transitions, 616 flow. Second operand has 12 states, 12 states have (on average 27.25) internal successors, (327), 12 states have internal predecessors, (327), 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 03:41:38,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:41:38,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 72 [2024-11-17 03:41:38,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:41:40,038 INFO L124 PetriNetUnfolderBase]: 9491/15421 cut-off events. [2024-11-17 03:41:40,038 INFO L125 PetriNetUnfolderBase]: For 19172/20279 co-relation queries the response was YES. [2024-11-17 03:41:40,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42774 conditions, 15421 events. 9491/15421 cut-off events. For 19172/20279 co-relation queries the response was YES. Maximal size of possible extension queue 685. Compared 113297 event pairs, 3256 based on Foata normal form. 0/13592 useless extension candidates. Maximal degree in co-relation 28792. Up to 7912 conditions per place. [2024-11-17 03:41:40,144 INFO L140 encePairwiseOnDemand]: 62/72 looper letters, 109 selfloop transitions, 19 changer transitions 0/153 dead transitions. [2024-11-17 03:41:40,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 153 transitions, 1062 flow [2024-11-17 03:41:40,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-17 03:41:40,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-17 03:41:40,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 274 transitions. [2024-11-17 03:41:40,145 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5436507936507936 [2024-11-17 03:41:40,145 INFO L175 Difference]: Start difference. First operand has 121 places, 100 transitions, 616 flow. Second operand 7 states and 274 transitions. [2024-11-17 03:41:40,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 153 transitions, 1062 flow [2024-11-17 03:41:40,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 153 transitions, 1032 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-11-17 03:41:40,169 INFO L231 Difference]: Finished difference. Result has 124 places, 102 transitions, 648 flow [2024-11-17 03:41:40,170 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=586, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=648, PETRI_PLACES=124, PETRI_TRANSITIONS=102} [2024-11-17 03:41:40,170 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 57 predicate places. [2024-11-17 03:41:40,170 INFO L471 AbstractCegarLoop]: Abstraction has has 124 places, 102 transitions, 648 flow [2024-11-17 03:41:40,171 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 27.25) internal successors, (327), 12 states have internal predecessors, (327), 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 03:41:40,171 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:41:40,171 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:41:40,187 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 03:41:40,371 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:41:40,372 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-17 03:41:40,372 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:41:40,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1147444744, now seen corresponding path program 1 times [2024-11-17 03:41:40,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:41:40,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842070348] [2024-11-17 03:41:40,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:41:40,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:41:40,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:41:40,425 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 03:41:40,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:41:40,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842070348] [2024-11-17 03:41:40,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842070348] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:41:40,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:41:40,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-17 03:41:40,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421972112] [2024-11-17 03:41:40,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:41:40,426 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:41:40,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:41:40,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:41:40,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:41:40,438 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 72 [2024-11-17 03:41:40,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 102 transitions, 648 flow. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 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 03:41:40,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:41:40,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 72 [2024-11-17 03:41:40,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:41:41,306 INFO L124 PetriNetUnfolderBase]: 7469/12502 cut-off events. [2024-11-17 03:41:41,306 INFO L125 PetriNetUnfolderBase]: For 21264/22032 co-relation queries the response was YES. [2024-11-17 03:41:41,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37268 conditions, 12502 events. 7469/12502 cut-off events. For 21264/22032 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 90310 event pairs, 5614 based on Foata normal form. 423/12221 useless extension candidates. Maximal degree in co-relation 25111. Up to 10536 conditions per place. [2024-11-17 03:41:41,381 INFO L140 encePairwiseOnDemand]: 68/72 looper letters, 68 selfloop transitions, 7 changer transitions 0/100 dead transitions. [2024-11-17 03:41:41,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 100 transitions, 794 flow [2024-11-17 03:41:41,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:41:41,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:41:41,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 130 transitions. [2024-11-17 03:41:41,382 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4513888888888889 [2024-11-17 03:41:41,382 INFO L175 Difference]: Start difference. First operand has 124 places, 102 transitions, 648 flow. Second operand 4 states and 130 transitions. [2024-11-17 03:41:41,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 100 transitions, 794 flow [2024-11-17 03:41:41,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 100 transitions, 765 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-17 03:41:41,402 INFO L231 Difference]: Finished difference. Result has 121 places, 100 transitions, 629 flow [2024-11-17 03:41:41,402 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=615, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=629, PETRI_PLACES=121, PETRI_TRANSITIONS=100} [2024-11-17 03:41:41,403 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 54 predicate places. [2024-11-17 03:41:41,403 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 100 transitions, 629 flow [2024-11-17 03:41:41,403 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 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 03:41:41,403 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:41:41,403 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:41:41,403 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-17 03:41:41,403 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-17 03:41:41,404 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:41:41,404 INFO L85 PathProgramCache]: Analyzing trace with hash -71102610, now seen corresponding path program 1 times [2024-11-17 03:41:41,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:41:41,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827215072] [2024-11-17 03:41:41,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:41:41,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:41:41,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:41:41,488 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:41:41,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:41:41,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827215072] [2024-11-17 03:41:41,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827215072] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:41:41,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639294551] [2024-11-17 03:41:41,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:41:41,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:41:41,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:41:41,491 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 03:41:41,493 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 03:41:41,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:41:41,566 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-17 03:41:41,568 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:41:41,648 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:41:41,649 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:41:41,712 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:41:41,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639294551] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:41:41,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:41:41,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-17 03:41:41,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932879272] [2024-11-17 03:41:41,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:41:41,713 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-17 03:41:41,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:41:41,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-17 03:41:41,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-11-17 03:41:41,805 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 72 [2024-11-17 03:41:41,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 100 transitions, 629 flow. Second operand has 14 states, 14 states have (on average 23.357142857142858) internal successors, (327), 14 states have internal predecessors, (327), 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 03:41:41,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:41:41,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 72 [2024-11-17 03:41:41,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:41:43,237 INFO L124 PetriNetUnfolderBase]: 11052/17703 cut-off events. [2024-11-17 03:41:43,237 INFO L125 PetriNetUnfolderBase]: For 22574/22828 co-relation queries the response was YES. [2024-11-17 03:41:43,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50808 conditions, 17703 events. 11052/17703 cut-off events. For 22574/22828 co-relation queries the response was YES. Maximal size of possible extension queue 645. Compared 127231 event pairs, 5569 based on Foata normal form. 154/16989 useless extension candidates. Maximal degree in co-relation 32866. Up to 8944 conditions per place. [2024-11-17 03:41:43,365 INFO L140 encePairwiseOnDemand]: 58/72 looper letters, 198 selfloop transitions, 39 changer transitions 0/250 dead transitions. [2024-11-17 03:41:43,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 250 transitions, 1775 flow [2024-11-17 03:41:43,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-17 03:41:43,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-17 03:41:43,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 421 transitions. [2024-11-17 03:41:43,367 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48726851851851855 [2024-11-17 03:41:43,367 INFO L175 Difference]: Start difference. First operand has 121 places, 100 transitions, 629 flow. Second operand 12 states and 421 transitions. [2024-11-17 03:41:43,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 250 transitions, 1775 flow [2024-11-17 03:41:43,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 250 transitions, 1767 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:41:43,397 INFO L231 Difference]: Finished difference. Result has 133 places, 106 transitions, 752 flow [2024-11-17 03:41:43,397 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=621, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=752, PETRI_PLACES=133, PETRI_TRANSITIONS=106} [2024-11-17 03:41:43,398 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 66 predicate places. [2024-11-17 03:41:43,398 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 106 transitions, 752 flow [2024-11-17 03:41:43,398 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 23.357142857142858) internal successors, (327), 14 states have internal predecessors, (327), 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 03:41:43,398 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:41:43,398 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:41:43,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-17 03:41:43,599 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-17 03:41:43,599 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-17 03:41:43,599 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:41:43,600 INFO L85 PathProgramCache]: Analyzing trace with hash 2016066449, now seen corresponding path program 1 times [2024-11-17 03:41:43,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:41:43,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384194656] [2024-11-17 03:41:43,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:41:43,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:41:43,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:41:43,725 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:41:43,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:41:43,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384194656] [2024-11-17 03:41:43,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384194656] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:41:43,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843084802] [2024-11-17 03:41:43,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:41:43,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:41:43,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:41:43,728 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 03:41:43,730 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 03:41:43,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:41:43,813 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-17 03:41:43,814 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:41:43,902 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:41:43,902 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:41:43,959 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:41:43,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843084802] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:41:43,959 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:41:43,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-17 03:41:43,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706045804] [2024-11-17 03:41:43,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:41:43,960 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-17 03:41:43,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:41:43,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-17 03:41:43,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-11-17 03:41:44,037 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 72 [2024-11-17 03:41:44,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 106 transitions, 752 flow. Second operand has 14 states, 14 states have (on average 23.928571428571427) internal successors, (335), 14 states have internal predecessors, (335), 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 03:41:44,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:41:44,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 72 [2024-11-17 03:41:44,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:41:45,424 INFO L124 PetriNetUnfolderBase]: 7846/12345 cut-off events. [2024-11-17 03:41:45,425 INFO L125 PetriNetUnfolderBase]: For 25732/26640 co-relation queries the response was YES. [2024-11-17 03:41:45,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39225 conditions, 12345 events. 7846/12345 cut-off events. For 25732/26640 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 81939 event pairs, 4565 based on Foata normal form. 76/11832 useless extension candidates. Maximal degree in co-relation 23904. Up to 7864 conditions per place. [2024-11-17 03:41:45,582 INFO L140 encePairwiseOnDemand]: 58/72 looper letters, 148 selfloop transitions, 39 changer transitions 0/202 dead transitions. [2024-11-17 03:41:45,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 202 transitions, 1581 flow [2024-11-17 03:41:45,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-17 03:41:45,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-17 03:41:45,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 396 transitions. [2024-11-17 03:41:45,586 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-11-17 03:41:45,586 INFO L175 Difference]: Start difference. First operand has 133 places, 106 transitions, 752 flow. Second operand 12 states and 396 transitions. [2024-11-17 03:41:45,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 202 transitions, 1581 flow [2024-11-17 03:41:45,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 202 transitions, 1519 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-11-17 03:41:45,622 INFO L231 Difference]: Finished difference. Result has 142 places, 112 transitions, 846 flow [2024-11-17 03:41:45,622 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=706, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=846, PETRI_PLACES=142, PETRI_TRANSITIONS=112} [2024-11-17 03:41:45,623 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 75 predicate places. [2024-11-17 03:41:45,624 INFO L471 AbstractCegarLoop]: Abstraction has has 142 places, 112 transitions, 846 flow [2024-11-17 03:41:45,624 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 23.928571428571427) internal successors, (335), 14 states have internal predecessors, (335), 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 03:41:45,624 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:41:45,625 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:41:45,642 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-17 03:41:45,825 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,SelfDestructingSolverStorable16 [2024-11-17 03:41:45,825 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-17 03:41:45,826 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:41:45,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1635460168, now seen corresponding path program 2 times [2024-11-17 03:41:45,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:41:45,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188802454] [2024-11-17 03:41:45,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:41:45,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:41:45,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:41:46,148 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-17 03:41:46,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:41:46,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188802454] [2024-11-17 03:41:46,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188802454] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:41:46,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091068617] [2024-11-17 03:41:46,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 03:41:46,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:41:46,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:41:46,151 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 03:41:46,153 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 03:41:46,233 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-17 03:41:46,233 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:41:46,234 INFO L255 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-17 03:41:46,237 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:41:46,242 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-17 03:41:46,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 03:41:46,338 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-17 03:41:46,346 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-17 03:41:46,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-17 03:41:46,466 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-17 03:41:46,466 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:41:46,668 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2024-11-17 03:41:46,816 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-17 03:41:46,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091068617] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:41:46,817 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:41:46,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 19 [2024-11-17 03:41:46,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593499296] [2024-11-17 03:41:46,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:41:46,818 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-17 03:41:46,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:41:46,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-17 03:41:46,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2024-11-17 03:41:47,114 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 72 [2024-11-17 03:41:47,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 112 transitions, 846 flow. Second operand has 21 states, 21 states have (on average 25.047619047619047) internal successors, (526), 21 states have internal predecessors, (526), 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 03:41:47,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:41:47,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 72 [2024-11-17 03:41:47,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:41:49,331 INFO L124 PetriNetUnfolderBase]: 9521/17264 cut-off events. [2024-11-17 03:41:49,331 INFO L125 PetriNetUnfolderBase]: For 33905/34285 co-relation queries the response was YES. [2024-11-17 03:41:49,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55986 conditions, 17264 events. 9521/17264 cut-off events. For 33905/34285 co-relation queries the response was YES. Maximal size of possible extension queue 639. Compared 140678 event pairs, 3533 based on Foata normal form. 308/16916 useless extension candidates. Maximal degree in co-relation 34508. Up to 5909 conditions per place. [2024-11-17 03:41:49,480 INFO L140 encePairwiseOnDemand]: 62/72 looper letters, 199 selfloop transitions, 33 changer transitions 0/261 dead transitions. [2024-11-17 03:41:49,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 261 transitions, 2150 flow [2024-11-17 03:41:49,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-17 03:41:49,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-17 03:41:49,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 458 transitions. [2024-11-17 03:41:49,482 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4893162393162393 [2024-11-17 03:41:49,482 INFO L175 Difference]: Start difference. First operand has 142 places, 112 transitions, 846 flow. Second operand 13 states and 458 transitions. [2024-11-17 03:41:49,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 261 transitions, 2150 flow [2024-11-17 03:41:49,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 261 transitions, 2075 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-11-17 03:41:49,545 INFO L231 Difference]: Finished difference. Result has 153 places, 124 transitions, 1023 flow [2024-11-17 03:41:49,545 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=800, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1023, PETRI_PLACES=153, PETRI_TRANSITIONS=124} [2024-11-17 03:41:49,545 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 86 predicate places. [2024-11-17 03:41:49,545 INFO L471 AbstractCegarLoop]: Abstraction has has 153 places, 124 transitions, 1023 flow [2024-11-17 03:41:49,546 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 25.047619047619047) internal successors, (526), 21 states have internal predecessors, (526), 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 03:41:49,546 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:41:49,546 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:41:49,558 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 03:41:49,746 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,SelfDestructingSolverStorable17 [2024-11-17 03:41:49,746 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-17 03:41:49,747 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:41:49,747 INFO L85 PathProgramCache]: Analyzing trace with hash -395919885, now seen corresponding path program 1 times [2024-11-17 03:41:49,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:41:49,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307637239] [2024-11-17 03:41:49,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:41:49,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:41:49,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:41:49,813 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:41:49,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:41:49,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307637239] [2024-11-17 03:41:49,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307637239] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:41:49,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:41:49,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-17 03:41:49,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924711483] [2024-11-17 03:41:49,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:41:49,814 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:41:49,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:41:49,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:41:49,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:41:49,830 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 72 [2024-11-17 03:41:49,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 124 transitions, 1023 flow. Second operand has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:41:49,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:41:49,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 72 [2024-11-17 03:41:49,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:41:52,259 INFO L124 PetriNetUnfolderBase]: 18877/31670 cut-off events. [2024-11-17 03:41:52,259 INFO L125 PetriNetUnfolderBase]: For 117892/118517 co-relation queries the response was YES. [2024-11-17 03:41:52,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113369 conditions, 31670 events. 18877/31670 cut-off events. For 117892/118517 co-relation queries the response was YES. Maximal size of possible extension queue 951. Compared 255414 event pairs, 8300 based on Foata normal form. 412/30303 useless extension candidates. Maximal degree in co-relation 68711. Up to 12443 conditions per place. [2024-11-17 03:41:52,638 INFO L140 encePairwiseOnDemand]: 65/72 looper letters, 227 selfloop transitions, 13 changer transitions 0/268 dead transitions. [2024-11-17 03:41:52,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 268 transitions, 2743 flow [2024-11-17 03:41:52,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 03:41:52,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 03:41:52,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 245 transitions. [2024-11-17 03:41:52,639 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5671296296296297 [2024-11-17 03:41:52,639 INFO L175 Difference]: Start difference. First operand has 153 places, 124 transitions, 1023 flow. Second operand 6 states and 245 transitions. [2024-11-17 03:41:52,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 268 transitions, 2743 flow [2024-11-17 03:41:52,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 268 transitions, 2708 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-11-17 03:41:52,744 INFO L231 Difference]: Finished difference. Result has 159 places, 135 transitions, 1180 flow [2024-11-17 03:41:52,744 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=1004, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1180, PETRI_PLACES=159, PETRI_TRANSITIONS=135} [2024-11-17 03:41:52,745 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 92 predicate places. [2024-11-17 03:41:52,745 INFO L471 AbstractCegarLoop]: Abstraction has has 159 places, 135 transitions, 1180 flow [2024-11-17 03:41:52,745 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:41:52,745 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:41:52,745 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:41:52,745 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-17 03:41:52,746 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-17 03:41:52,746 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:41:52,746 INFO L85 PathProgramCache]: Analyzing trace with hash -814020251, now seen corresponding path program 2 times [2024-11-17 03:41:52,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:41:52,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827195866] [2024-11-17 03:41:52,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:41:52,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:41:52,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:41:52,808 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:41:52,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:41:52,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827195866] [2024-11-17 03:41:52,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827195866] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:41:52,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:41:52,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-17 03:41:52,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100971077] [2024-11-17 03:41:52,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:41:52,810 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:41:52,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:41:52,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:41:52,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:41:52,831 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 72 [2024-11-17 03:41:52,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 135 transitions, 1180 flow. Second operand has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:41:52,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:41:52,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 72 [2024-11-17 03:41:52,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:41:57,290 INFO L124 PetriNetUnfolderBase]: 20321/34476 cut-off events. [2024-11-17 03:41:57,291 INFO L125 PetriNetUnfolderBase]: For 140924/141899 co-relation queries the response was YES. [2024-11-17 03:41:57,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128180 conditions, 34476 events. 20321/34476 cut-off events. For 140924/141899 co-relation queries the response was YES. Maximal size of possible extension queue 1089. Compared 284752 event pairs, 8876 based on Foata normal form. 456/33022 useless extension candidates. Maximal degree in co-relation 88730. Up to 20093 conditions per place. [2024-11-17 03:41:57,609 INFO L140 encePairwiseOnDemand]: 65/72 looper letters, 212 selfloop transitions, 28 changer transitions 0/268 dead transitions. [2024-11-17 03:41:57,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 268 transitions, 2817 flow [2024-11-17 03:41:57,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 03:41:57,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 03:41:57,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 248 transitions. [2024-11-17 03:41:57,610 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5740740740740741 [2024-11-17 03:41:57,610 INFO L175 Difference]: Start difference. First operand has 159 places, 135 transitions, 1180 flow. Second operand 6 states and 248 transitions. [2024-11-17 03:41:57,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 268 transitions, 2817 flow [2024-11-17 03:41:57,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 268 transitions, 2809 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-17 03:41:57,745 INFO L231 Difference]: Finished difference. Result has 167 places, 146 transitions, 1396 flow [2024-11-17 03:41:57,745 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=1175, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1396, PETRI_PLACES=167, PETRI_TRANSITIONS=146} [2024-11-17 03:41:57,745 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 100 predicate places. [2024-11-17 03:41:57,746 INFO L471 AbstractCegarLoop]: Abstraction has has 167 places, 146 transitions, 1396 flow [2024-11-17 03:41:57,746 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:41:57,746 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:41:57,746 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:41:57,746 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-17 03:41:57,746 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-17 03:41:57,746 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:41:57,747 INFO L85 PathProgramCache]: Analyzing trace with hash -869431511, now seen corresponding path program 3 times [2024-11-17 03:41:57,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:41:57,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129109645] [2024-11-17 03:41:57,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:41:57,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:41:57,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:41:57,810 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:41:57,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:41:57,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129109645] [2024-11-17 03:41:57,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129109645] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:41:57,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:41:57,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-17 03:41:57,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818687559] [2024-11-17 03:41:57,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:41:57,812 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:41:57,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:41:57,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:41:57,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:41:57,940 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 72 [2024-11-17 03:41:57,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 146 transitions, 1396 flow. Second operand has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:41:57,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:41:57,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 72 [2024-11-17 03:41:57,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:42:01,889 INFO L124 PetriNetUnfolderBase]: 20139/33990 cut-off events. [2024-11-17 03:42:01,889 INFO L125 PetriNetUnfolderBase]: For 155213/155932 co-relation queries the response was YES. [2024-11-17 03:42:02,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127944 conditions, 33990 events. 20139/33990 cut-off events. For 155213/155932 co-relation queries the response was YES. Maximal size of possible extension queue 822. Compared 272600 event pairs, 3748 based on Foata normal form. 604/33217 useless extension candidates. Maximal degree in co-relation 76612. Up to 13915 conditions per place. [2024-11-17 03:42:02,212 INFO L140 encePairwiseOnDemand]: 65/72 looper letters, 202 selfloop transitions, 32 changer transitions 0/262 dead transitions. [2024-11-17 03:42:02,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 262 transitions, 2851 flow [2024-11-17 03:42:02,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 03:42:02,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 03:42:02,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 246 transitions. [2024-11-17 03:42:02,213 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5694444444444444 [2024-11-17 03:42:02,213 INFO L175 Difference]: Start difference. First operand has 167 places, 146 transitions, 1396 flow. Second operand 6 states and 246 transitions. [2024-11-17 03:42:02,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 262 transitions, 2851 flow [2024-11-17 03:42:02,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 262 transitions, 2799 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-11-17 03:42:02,615 INFO L231 Difference]: Finished difference. Result has 173 places, 148 transitions, 1481 flow [2024-11-17 03:42:02,615 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=1336, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1481, PETRI_PLACES=173, PETRI_TRANSITIONS=148} [2024-11-17 03:42:02,616 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 106 predicate places. [2024-11-17 03:42:02,616 INFO L471 AbstractCegarLoop]: Abstraction has has 173 places, 148 transitions, 1481 flow [2024-11-17 03:42:02,616 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:42:02,616 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:42:02,616 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:42:02,616 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-11-17 03:42:02,616 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-17 03:42:02,617 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:42:02,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1232496965, now seen corresponding path program 1 times [2024-11-17 03:42:02,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:42:02,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894163993] [2024-11-17 03:42:02,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:42:02,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:42:02,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:02,811 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 03:42:02,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:42:02,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894163993] [2024-11-17 03:42:02,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894163993] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:42:02,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:42:02,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-17 03:42:02,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554484601] [2024-11-17 03:42:02,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:42:02,812 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:42:02,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:42:02,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:42:02,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:42:02,840 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 72 [2024-11-17 03:42:02,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 148 transitions, 1481 flow. Second operand has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 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 03:42:02,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:42:02,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 72 [2024-11-17 03:42:02,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:42:07,000 INFO L124 PetriNetUnfolderBase]: 18709/32686 cut-off events. [2024-11-17 03:42:07,000 INFO L125 PetriNetUnfolderBase]: For 163461/163926 co-relation queries the response was YES. [2024-11-17 03:42:07,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125617 conditions, 32686 events. 18709/32686 cut-off events. For 163461/163926 co-relation queries the response was YES. Maximal size of possible extension queue 808. Compared 272626 event pairs, 14179 based on Foata normal form. 27/30961 useless extension candidates. Maximal degree in co-relation 80773. Up to 25823 conditions per place. [2024-11-17 03:42:07,292 INFO L140 encePairwiseOnDemand]: 68/72 looper letters, 124 selfloop transitions, 2 changer transitions 23/168 dead transitions. [2024-11-17 03:42:07,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 168 transitions, 1943 flow [2024-11-17 03:42:07,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:42:07,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:42:07,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 152 transitions. [2024-11-17 03:42:07,293 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2024-11-17 03:42:07,293 INFO L175 Difference]: Start difference. First operand has 173 places, 148 transitions, 1481 flow. Second operand 4 states and 152 transitions. [2024-11-17 03:42:07,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 168 transitions, 1943 flow [2024-11-17 03:42:07,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 168 transitions, 1853 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-11-17 03:42:07,529 INFO L231 Difference]: Finished difference. Result has 173 places, 145 transitions, 1382 flow [2024-11-17 03:42:07,529 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=1408, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1382, PETRI_PLACES=173, PETRI_TRANSITIONS=145} [2024-11-17 03:42:07,530 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 106 predicate places. [2024-11-17 03:42:07,530 INFO L471 AbstractCegarLoop]: Abstraction has has 173 places, 145 transitions, 1382 flow [2024-11-17 03:42:07,530 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 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 03:42:07,530 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:42:07,530 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:42:07,530 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-11-17 03:42:07,530 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-17 03:42:07,530 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:42:07,530 INFO L85 PathProgramCache]: Analyzing trace with hash 740489892, now seen corresponding path program 3 times [2024-11-17 03:42:07,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:42:07,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650503159] [2024-11-17 03:42:07,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:42:07,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:42:07,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:07,640 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-17 03:42:07,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:42:07,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650503159] [2024-11-17 03:42:07,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650503159] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:42:07,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466571139] [2024-11-17 03:42:07,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-17 03:42:07,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:42:07,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:42:07,643 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 03:42:07,644 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 03:42:07,723 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-17 03:42:07,723 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:42:07,724 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-17 03:42:07,726 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:42:07,735 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-17 03:42:07,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 03:42:07,809 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-17 03:42:07,819 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-17 03:42:07,819 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-17 03:42:07,923 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-17 03:42:07,923 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:42:08,202 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 42 treesize of output 38 [2024-11-17 03:42:08,264 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-17 03:42:08,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466571139] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:42:08,265 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:42:08,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 22 [2024-11-17 03:42:08,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001876270] [2024-11-17 03:42:08,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:42:08,266 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-17 03:42:08,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:42:08,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-17 03:42:08,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2024-11-17 03:42:08,798 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 72 [2024-11-17 03:42:08,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 145 transitions, 1382 flow. Second operand has 23 states, 23 states have (on average 21.565217391304348) internal successors, (496), 23 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:42:08,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:42:08,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 72 [2024-11-17 03:42:08,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:42:15,165 INFO L124 PetriNetUnfolderBase]: 27401/43606 cut-off events. [2024-11-17 03:42:15,165 INFO L125 PetriNetUnfolderBase]: For 139806/140255 co-relation queries the response was YES. [2024-11-17 03:42:15,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159289 conditions, 43606 events. 27401/43606 cut-off events. For 139806/140255 co-relation queries the response was YES. Maximal size of possible extension queue 965. Compared 341570 event pairs, 4908 based on Foata normal form. 737/42369 useless extension candidates. Maximal degree in co-relation 159219. Up to 5343 conditions per place. [2024-11-17 03:42:15,691 INFO L140 encePairwiseOnDemand]: 57/72 looper letters, 642 selfloop transitions, 62 changer transitions 0/719 dead transitions. [2024-11-17 03:42:15,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 719 transitions, 7914 flow [2024-11-17 03:42:15,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-17 03:42:15,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-11-17 03:42:15,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 872 transitions. [2024-11-17 03:42:15,694 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41762452107279696 [2024-11-17 03:42:15,694 INFO L175 Difference]: Start difference. First operand has 173 places, 145 transitions, 1382 flow. Second operand 29 states and 872 transitions. [2024-11-17 03:42:15,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 719 transitions, 7914 flow [2024-11-17 03:42:16,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 719 transitions, 7842 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-11-17 03:42:16,178 INFO L231 Difference]: Finished difference. Result has 196 places, 158 transitions, 1619 flow [2024-11-17 03:42:16,180 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=1339, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=1619, PETRI_PLACES=196, PETRI_TRANSITIONS=158} [2024-11-17 03:42:16,181 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 129 predicate places. [2024-11-17 03:42:16,181 INFO L471 AbstractCegarLoop]: Abstraction has has 196 places, 158 transitions, 1619 flow [2024-11-17 03:42:16,181 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 21.565217391304348) internal successors, (496), 23 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:42:16,182 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:42:16,182 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:42:16,198 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-17 03:42:16,382 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,SelfDestructingSolverStorable22 [2024-11-17 03:42:16,383 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-17 03:42:16,383 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:42:16,383 INFO L85 PathProgramCache]: Analyzing trace with hash 2053086967, now seen corresponding path program 2 times [2024-11-17 03:42:16,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:42:16,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104725855] [2024-11-17 03:42:16,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:42:16,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:42:16,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:16,662 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-17 03:42:16,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:42:16,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104725855] [2024-11-17 03:42:16,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104725855] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:42:16,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114963606] [2024-11-17 03:42:16,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 03:42:16,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:42:16,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:42:16,665 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 03:42:16,666 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 03:42:16,764 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-17 03:42:16,764 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:42:16,766 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-17 03:42:16,768 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:42:16,776 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-17 03:42:16,858 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2024-11-17 03:42:16,858 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2024-11-17 03:42:17,560 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:42:17,560 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:42:17,797 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-17 03:42:17,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114963606] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:42:17,797 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:42:17,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 6] total 20 [2024-11-17 03:42:17,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965393737] [2024-11-17 03:42:17,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:42:17,798 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-17 03:42:17,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:42:17,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-17 03:42:17,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2024-11-17 03:42:18,151 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 72 [2024-11-17 03:42:18,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 158 transitions, 1619 flow. Second operand has 22 states, 22 states have (on average 23.545454545454547) internal successors, (518), 22 states have internal predecessors, (518), 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 03:42:18,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:42:18,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 72 [2024-11-17 03:42:18,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:42:22,154 INFO L124 PetriNetUnfolderBase]: 16240/28745 cut-off events. [2024-11-17 03:42:22,154 INFO L125 PetriNetUnfolderBase]: For 173794/174633 co-relation queries the response was YES. [2024-11-17 03:42:22,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117350 conditions, 28745 events. 16240/28745 cut-off events. For 173794/174633 co-relation queries the response was YES. Maximal size of possible extension queue 726. Compared 239831 event pairs, 3772 based on Foata normal form. 222/27506 useless extension candidates. Maximal degree in co-relation 72311. Up to 6998 conditions per place. [2024-11-17 03:42:22,475 INFO L140 encePairwiseOnDemand]: 62/72 looper letters, 215 selfloop transitions, 50 changer transitions 0/300 dead transitions. [2024-11-17 03:42:22,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 300 transitions, 3500 flow [2024-11-17 03:42:22,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-17 03:42:22,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-17 03:42:22,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 447 transitions. [2024-11-17 03:42:22,477 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41388888888888886 [2024-11-17 03:42:22,477 INFO L175 Difference]: Start difference. First operand has 196 places, 158 transitions, 1619 flow. Second operand 15 states and 447 transitions. [2024-11-17 03:42:22,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 300 transitions, 3500 flow [2024-11-17 03:42:22,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 300 transitions, 3380 flow, removed 40 selfloop flow, removed 9 redundant places. [2024-11-17 03:42:22,844 INFO L231 Difference]: Finished difference. Result has 205 places, 177 transitions, 2009 flow [2024-11-17 03:42:22,845 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=1549, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2009, PETRI_PLACES=205, PETRI_TRANSITIONS=177} [2024-11-17 03:42:22,845 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 138 predicate places. [2024-11-17 03:42:22,845 INFO L471 AbstractCegarLoop]: Abstraction has has 205 places, 177 transitions, 2009 flow [2024-11-17 03:42:22,846 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 23.545454545454547) internal successors, (518), 22 states have internal predecessors, (518), 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 03:42:22,846 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:42:22,846 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:42:22,858 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 03:42:23,046 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,SelfDestructingSolverStorable23 [2024-11-17 03:42:23,046 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-17 03:42:23,047 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:42:23,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1292794228, now seen corresponding path program 1 times [2024-11-17 03:42:23,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:42:23,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275391093] [2024-11-17 03:42:23,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:42:23,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:42:23,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:23,127 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 03:42:23,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:42:23,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275391093] [2024-11-17 03:42:23,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275391093] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:42:23,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686235376] [2024-11-17 03:42:23,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:42:23,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:42:23,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:42:23,130 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 03:42:23,132 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 03:42:23,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:23,224 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-17 03:42:23,227 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:42:23,264 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 03:42:23,264 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:42:23,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:42:23,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686235376] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-17 03:42:23,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-17 03:42:23,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2024-11-17 03:42:23,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707773655] [2024-11-17 03:42:23,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:42:23,308 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:42:23,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:42:23,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:42:23,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-11-17 03:42:23,333 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 72 [2024-11-17 03:42:23,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 177 transitions, 2009 flow. Second operand has 5 states, 5 states have (on average 27.6) internal successors, (138), 5 states have internal predecessors, (138), 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 03:42:23,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:42:23,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 72 [2024-11-17 03:42:23,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:42:26,877 INFO L124 PetriNetUnfolderBase]: 15996/28143 cut-off events. [2024-11-17 03:42:26,878 INFO L125 PetriNetUnfolderBase]: For 185000/185742 co-relation queries the response was YES. [2024-11-17 03:42:27,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117660 conditions, 28143 events. 15996/28143 cut-off events. For 185000/185742 co-relation queries the response was YES. Maximal size of possible extension queue 703. Compared 232490 event pairs, 12212 based on Foata normal form. 28/26635 useless extension candidates. Maximal degree in co-relation 77272. Up to 22237 conditions per place. [2024-11-17 03:42:27,171 INFO L140 encePairwiseOnDemand]: 65/72 looper letters, 110 selfloop transitions, 25 changer transitions 0/160 dead transitions. [2024-11-17 03:42:27,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 160 transitions, 2005 flow [2024-11-17 03:42:27,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:42:27,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:42:27,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 155 transitions. [2024-11-17 03:42:27,172 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4305555555555556 [2024-11-17 03:42:27,172 INFO L175 Difference]: Start difference. First operand has 205 places, 177 transitions, 2009 flow. Second operand 5 states and 155 transitions. [2024-11-17 03:42:27,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 160 transitions, 2005 flow [2024-11-17 03:42:27,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 160 transitions, 1891 flow, removed 10 selfloop flow, removed 15 redundant places. [2024-11-17 03:42:27,410 INFO L231 Difference]: Finished difference. Result has 189 places, 160 transitions, 1696 flow [2024-11-17 03:42:27,410 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=1613, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1696, PETRI_PLACES=189, PETRI_TRANSITIONS=160} [2024-11-17 03:42:27,411 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 122 predicate places. [2024-11-17 03:42:27,411 INFO L471 AbstractCegarLoop]: Abstraction has has 189 places, 160 transitions, 1696 flow [2024-11-17 03:42:27,411 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.6) internal successors, (138), 5 states have internal predecessors, (138), 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 03:42:27,411 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:42:27,412 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:42:27,428 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-17 03:42:27,612 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-17 03:42:27,612 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-17 03:42:27,613 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:42:27,613 INFO L85 PathProgramCache]: Analyzing trace with hash -778812967, now seen corresponding path program 1 times [2024-11-17 03:42:27,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:42:27,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417592377] [2024-11-17 03:42:27,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:42:27,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:42:27,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:27,884 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-17 03:42:27,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:42:27,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417592377] [2024-11-17 03:42:27,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417592377] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:42:27,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846074182] [2024-11-17 03:42:27,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:42:27,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:42:27,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:42:27,887 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 03:42:27,889 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 03:42:27,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:27,979 INFO L255 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-17 03:42:27,980 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:42:28,162 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-17 03:42:28,162 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:42:28,301 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 03:42:28,652 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-17 03:42:28,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846074182] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:42:28,653 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:42:28,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 22 [2024-11-17 03:42:28,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832087848] [2024-11-17 03:42:28,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:42:28,654 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-17 03:42:28,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:42:28,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-17 03:42:28,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2024-11-17 03:42:29,037 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 72 [2024-11-17 03:42:29,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 160 transitions, 1696 flow. Second operand has 23 states, 23 states have (on average 24.869565217391305) internal successors, (572), 23 states have internal predecessors, (572), 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 03:42:29,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:42:29,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 72 [2024-11-17 03:42:29,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:42:33,102 INFO L124 PetriNetUnfolderBase]: 17661/29930 cut-off events. [2024-11-17 03:42:33,103 INFO L125 PetriNetUnfolderBase]: For 155034/155647 co-relation queries the response was YES. [2024-11-17 03:42:33,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118817 conditions, 29930 events. 17661/29930 cut-off events. For 155034/155647 co-relation queries the response was YES. Maximal size of possible extension queue 750. Compared 242084 event pairs, 5645 based on Foata normal form. 254/28438 useless extension candidates. Maximal degree in co-relation 77510. Up to 10991 conditions per place. [2024-11-17 03:42:33,704 INFO L140 encePairwiseOnDemand]: 60/72 looper letters, 213 selfloop transitions, 45 changer transitions 0/282 dead transitions. [2024-11-17 03:42:33,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 282 transitions, 3128 flow [2024-11-17 03:42:33,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-17 03:42:33,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-17 03:42:33,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 445 transitions. [2024-11-17 03:42:33,705 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44146825396825395 [2024-11-17 03:42:33,705 INFO L175 Difference]: Start difference. First operand has 189 places, 160 transitions, 1696 flow. Second operand 14 states and 445 transitions. [2024-11-17 03:42:33,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 282 transitions, 3128 flow [2024-11-17 03:42:34,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 282 transitions, 3097 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-17 03:42:34,081 INFO L231 Difference]: Finished difference. Result has 202 places, 162 transitions, 1806 flow [2024-11-17 03:42:34,081 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=1665, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1806, PETRI_PLACES=202, PETRI_TRANSITIONS=162} [2024-11-17 03:42:34,081 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 135 predicate places. [2024-11-17 03:42:34,081 INFO L471 AbstractCegarLoop]: Abstraction has has 202 places, 162 transitions, 1806 flow [2024-11-17 03:42:34,082 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 24.869565217391305) internal successors, (572), 23 states have internal predecessors, (572), 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 03:42:34,082 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:42:34,082 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:42:34,094 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0