./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 023d838f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/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-023d838-m [2024-11-10 18:22:23,269 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-10 18:22:23,354 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-10 18:22:23,359 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-10 18:22:23,359 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-10 18:22:23,392 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-10 18:22:23,393 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-10 18:22:23,393 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-10 18:22:23,394 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-10 18:22:23,394 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-10 18:22:23,395 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-10 18:22:23,395 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-10 18:22:23,398 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-10 18:22:23,402 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-10 18:22:23,402 INFO L153 SettingsManager]: * Use SBE=true [2024-11-10 18:22:23,403 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-10 18:22:23,403 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-10 18:22:23,403 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-10 18:22:23,403 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-10 18:22:23,404 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-10 18:22:23,404 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-10 18:22:23,404 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-10 18:22:23,405 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-10 18:22:23,405 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-10 18:22:23,407 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-10 18:22:23,407 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-10 18:22:23,407 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-10 18:22:23,408 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-10 18:22:23,408 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-10 18:22:23,408 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-10 18:22:23,409 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-10 18:22:23,409 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-10 18:22:23,409 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-10 18:22:23,409 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 18:22:23,410 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-10 18:22:23,411 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-10 18:22:23,411 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-10 18:22:23,411 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-10 18:22:23,411 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-10 18:22:23,412 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-10 18:22:23,412 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-10 18:22:23,413 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-10 18:22:23,413 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0c7c5c48eda3eba87519854c38b7495ee97c35417d2a6e287791b53fe49d6c07 [2024-11-10 18:22:23,708 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-10 18:22:23,735 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-10 18:22:23,740 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-10 18:22:23,741 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-10 18:22:23,741 INFO L274 PluginConnector]: CDTParser initialized [2024-11-10 18:22:23,743 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c [2024-11-10 18:22:25,325 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-10 18:22:25,541 INFO L384 CDTParser]: Found 1 translation units. [2024-11-10 18:22:25,542 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c [2024-11-10 18:22:25,555 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0eb1a0968/41b5b4591358404b8294f8739759e065/FLAGb0c211a1e [2024-11-10 18:22:25,574 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0eb1a0968/41b5b4591358404b8294f8739759e065 [2024-11-10 18:22:25,578 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-10 18:22:25,579 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-10 18:22:25,583 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-10 18:22:25,583 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-10 18:22:25,589 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-10 18:22:25,590 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 06:22:25" (1/1) ... [2024-11-10 18:22:25,591 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3112c802 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:22:25, skipping insertion in model container [2024-11-10 18:22:25,591 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 06:22:25" (1/1) ... [2024-11-10 18:22:25,621 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-10 18:22:25,885 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-10 18:22:25,889 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 18:22:25,899 INFO L200 MainTranslator]: Completed pre-run [2024-11-10 18:22:25,925 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 18:22:25,946 INFO L204 MainTranslator]: Completed translation [2024-11-10 18:22:25,946 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:22:25 WrapperNode [2024-11-10 18:22:25,946 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-10 18:22:25,948 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-10 18:22:25,948 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-10 18:22:25,948 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-10 18:22:25,956 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:22:25" (1/1) ... [2024-11-10 18:22:25,966 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:22:25" (1/1) ... [2024-11-10 18:22:25,998 INFO L138 Inliner]: procedures = 23, calls = 21, calls flagged for inlining = 8, calls inlined = 10, statements flattened = 109 [2024-11-10 18:22:25,999 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-10 18:22:26,000 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-10 18:22:26,000 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-10 18:22:26,000 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-10 18:22:26,015 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:22:25" (1/1) ... [2024-11-10 18:22:26,016 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:22:25" (1/1) ... [2024-11-10 18:22:26,020 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:22:25" (1/1) ... [2024-11-10 18:22:26,037 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]. [2024-11-10 18:22:26,038 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:22:25" (1/1) ... [2024-11-10 18:22:26,038 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:22:25" (1/1) ... [2024-11-10 18:22:26,045 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:22:25" (1/1) ... [2024-11-10 18:22:26,046 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:22:25" (1/1) ... [2024-11-10 18:22:26,048 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:22:25" (1/1) ... [2024-11-10 18:22:26,052 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:22:25" (1/1) ... [2024-11-10 18:22:26,056 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-10 18:22:26,061 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-10 18:22:26,061 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-10 18:22:26,061 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-10 18:22:26,062 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:22:25" (1/1) ... [2024-11-10 18:22:26,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 18:22:26,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:22:26,112 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-10 18:22:26,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-10 18:22:26,171 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-10 18:22:26,171 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-10 18:22:26,172 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-10 18:22:26,172 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-10 18:22:26,172 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-10 18:22:26,172 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-10 18:22:26,173 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-10 18:22:26,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-10 18:22:26,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-10 18:22:26,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-10 18:22:26,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-10 18:22:26,175 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-10 18:22:26,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-10 18:22:26,175 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-10 18:22:26,175 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-10 18:22:26,176 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-10 18:22:26,177 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-10 18:22:26,307 INFO L256 CfgBuilder]: Building ICFG [2024-11-10 18:22:26,310 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-10 18:22:26,748 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-10 18:22:26,748 INFO L307 CfgBuilder]: Performing block encoding [2024-11-10 18:22:26,962 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-10 18:22:26,962 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-10 18:22:26,963 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 06:22:26 BoogieIcfgContainer [2024-11-10 18:22:26,963 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-10 18:22:26,968 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-10 18:22:26,968 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-10 18:22:26,972 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-10 18:22:26,972 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 06:22:25" (1/3) ... [2024-11-10 18:22:26,973 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b459fdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 06:22:26, skipping insertion in model container [2024-11-10 18:22:26,973 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:22:25" (2/3) ... [2024-11-10 18:22:26,973 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b459fdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 06:22:26, skipping insertion in model container [2024-11-10 18:22:26,973 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 06:22:26" (3/3) ... [2024-11-10 18:22:26,975 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-simple-array-sum.wvr.c [2024-11-10 18:22:26,991 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-10 18:22:26,991 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2024-11-10 18:22:26,992 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-10 18:22:27,057 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-10 18:22:27,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 71 places, 72 transitions, 165 flow [2024-11-10 18:22:27,154 INFO L124 PetriNetUnfolderBase]: 11/69 cut-off events. [2024-11-10 18:22:27,155 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-10 18:22:27,161 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. [2024-11-10 18:22:27,162 INFO L82 GeneralOperation]: Start removeDead. Operand has 71 places, 72 transitions, 165 flow [2024-11-10 18:22:27,167 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 67 places, 68 transitions, 154 flow [2024-11-10 18:22:27,182 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 18:22:27,190 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;@549bc2b8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 18:22:27,192 INFO L334 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2024-11-10 18:22:27,198 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 18:22:27,202 INFO L124 PetriNetUnfolderBase]: 2/7 cut-off events. [2024-11-10 18:22:27,202 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 18:22:27,202 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:22:27,203 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-10 18:22:27,204 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-10 18:22:27,210 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:22:27,211 INFO L85 PathProgramCache]: Analyzing trace with hash 14221954, now seen corresponding path program 1 times [2024-11-10 18:22:27,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:22:27,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827583732] [2024-11-10 18:22:27,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:22:27,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:22:27,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:22:27,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:22:27,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:22:27,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827583732] [2024-11-10 18:22:27,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827583732] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:22:27,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:22:27,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-10 18:22:27,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917443572] [2024-11-10 18:22:27,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:22:27,527 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:22:27,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:22:27,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:22:27,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:22:27,587 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 72 [2024-11-10 18:22:27,590 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) [2024-11-10 18:22:27,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:22:27,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 72 [2024-11-10 18:22:27,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:22:28,211 INFO L124 PetriNetUnfolderBase]: 2574/4030 cut-off events. [2024-11-10 18:22:28,212 INFO L125 PetriNetUnfolderBase]: For 232/232 co-relation queries the response was YES. [2024-11-10 18:22:28,229 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. [2024-11-10 18:22:28,305 INFO L140 encePairwiseOnDemand]: 62/72 looper letters, 38 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2024-11-10 18:22:28,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 59 transitions, 216 flow [2024-11-10 18:22:28,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:22:28,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:22:28,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 117 transitions. [2024-11-10 18:22:28,320 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-11-10 18:22:28,322 INFO L175 Difference]: Start difference. First operand has 67 places, 68 transitions, 154 flow. Second operand 3 states and 117 transitions. [2024-11-10 18:22:28,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 59 transitions, 216 flow [2024-11-10 18:22:28,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 59 transitions, 204 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-10 18:22:28,338 INFO L231 Difference]: Finished difference. Result has 59 places, 59 transitions, 128 flow [2024-11-10 18:22:28,341 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} [2024-11-10 18:22:28,348 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, -8 predicate places. [2024-11-10 18:22:28,348 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 59 transitions, 128 flow [2024-11-10 18:22:28,349 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) [2024-11-10 18:22:28,349 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:22:28,349 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-10 18:22:28,349 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-10 18:22:28,350 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-10 18:22:28,350 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:22:28,351 INFO L85 PathProgramCache]: Analyzing trace with hash 14221955, now seen corresponding path program 1 times [2024-11-10 18:22:28,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:22:28,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014906430] [2024-11-10 18:22:28,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:22:28,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:22:28,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:22:28,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:22:28,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:22:28,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014906430] [2024-11-10 18:22:28,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014906430] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:22:28,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:22:28,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:22:28,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913009292] [2024-11-10 18:22:28,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:22:28,699 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:22:28,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:22:28,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:22:28,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 18:22:28,739 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 72 [2024-11-10 18:22:28,741 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) [2024-11-10 18:22:28,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:22:28,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 72 [2024-11-10 18:22:28,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:22:29,259 INFO L124 PetriNetUnfolderBase]: 2575/4035 cut-off events. [2024-11-10 18:22:29,260 INFO L125 PetriNetUnfolderBase]: For 66/66 co-relation queries the response was YES. [2024-11-10 18:22:29,267 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. [2024-11-10 18:22:29,291 INFO L140 encePairwiseOnDemand]: 67/72 looper letters, 41 selfloop transitions, 4 changer transitions 0/62 dead transitions. [2024-11-10 18:22:29,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 62 transitions, 224 flow [2024-11-10 18:22:29,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 18:22:29,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 18:22:29,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 138 transitions. [2024-11-10 18:22:29,294 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2024-11-10 18:22:29,294 INFO L175 Difference]: Start difference. First operand has 59 places, 59 transitions, 128 flow. Second operand 4 states and 138 transitions. [2024-11-10 18:22:29,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 62 transitions, 224 flow [2024-11-10 18:22:29,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 62 transitions, 220 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:22:29,299 INFO L231 Difference]: Finished difference. Result has 62 places, 62 transitions, 151 flow [2024-11-10 18:22:29,300 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} [2024-11-10 18:22:29,301 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, -5 predicate places. [2024-11-10 18:22:29,302 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 62 transitions, 151 flow [2024-11-10 18:22:29,302 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) [2024-11-10 18:22:29,303 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:22:29,303 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-11-10 18:22:29,304 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-10 18:22:29,304 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-10 18:22:29,304 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:22:29,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1515042386, now seen corresponding path program 1 times [2024-11-10 18:22:29,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:22:29,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753540730] [2024-11-10 18:22:29,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:22:29,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:22:29,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:22:29,660 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:22:29,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:22:29,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753540730] [2024-11-10 18:22:29,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753540730] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:22:29,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782230181] [2024-11-10 18:22:29,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:22:29,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:22:29,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:22:29,667 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:22:29,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-10 18:22:29,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:22:29,749 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-10 18:22:29,755 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:22:29,861 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-10 18:22:30,060 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:22:30,061 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:22:30,205 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:22:30,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782230181] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:22:30,207 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:22:30,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-10 18:22:30,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173367313] [2024-11-10 18:22:30,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:22:30,208 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-10 18:22:30,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:22:30,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-10 18:22:30,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-11-10 18:22:30,289 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 72 [2024-11-10 18:22:30,290 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) [2024-11-10 18:22:30,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:22:30,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 72 [2024-11-10 18:22:30,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:22:31,079 INFO L124 PetriNetUnfolderBase]: 2576/4039 cut-off events. [2024-11-10 18:22:31,079 INFO L125 PetriNetUnfolderBase]: For 70/70 co-relation queries the response was YES. [2024-11-10 18:22:31,087 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. [2024-11-10 18:22:31,110 INFO L140 encePairwiseOnDemand]: 65/72 looper letters, 39 selfloop transitions, 12 changer transitions 0/66 dead transitions. [2024-11-10 18:22:31,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 66 transitions, 265 flow [2024-11-10 18:22:31,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-10 18:22:31,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-10 18:22:31,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 242 transitions. [2024-11-10 18:22:31,113 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3734567901234568 [2024-11-10 18:22:31,113 INFO L175 Difference]: Start difference. First operand has 62 places, 62 transitions, 151 flow. Second operand 9 states and 242 transitions. [2024-11-10 18:22:31,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 66 transitions, 265 flow [2024-11-10 18:22:31,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 66 transitions, 262 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 18:22:31,115 INFO L231 Difference]: Finished difference. Result has 68 places, 64 transitions, 180 flow [2024-11-10 18:22:31,116 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} [2024-11-10 18:22:31,116 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 1 predicate places. [2024-11-10 18:22:31,116 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 64 transitions, 180 flow [2024-11-10 18:22:31,117 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) [2024-11-10 18:22:31,117 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:22:31,117 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:22:31,136 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-10 18:22:31,318 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 [2024-11-10 18:22:31,319 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-10 18:22:31,320 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:22:31,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1516405754, now seen corresponding path program 1 times [2024-11-10 18:22:31,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:22:31,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308118812] [2024-11-10 18:22:31,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:22:31,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:22:31,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:22:31,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:22:31,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:22:31,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308118812] [2024-11-10 18:22:31,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308118812] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:22:31,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:22:31,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-10 18:22:31,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117176076] [2024-11-10 18:22:31,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:22:31,445 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 18:22:31,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:22:31,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 18:22:31,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-10 18:22:31,486 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 72 [2024-11-10 18:22:31,487 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) [2024-11-10 18:22:31,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:22:31,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 72 [2024-11-10 18:22:31,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:22:32,328 INFO L124 PetriNetUnfolderBase]: 5148/8064 cut-off events. [2024-11-10 18:22:32,329 INFO L125 PetriNetUnfolderBase]: For 148/148 co-relation queries the response was YES. [2024-11-10 18:22:32,347 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. [2024-11-10 18:22:32,404 INFO L140 encePairwiseOnDemand]: 64/72 looper letters, 79 selfloop transitions, 8 changer transitions 0/103 dead transitions. [2024-11-10 18:22:32,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 103 transitions, 444 flow [2024-11-10 18:22:32,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 18:22:32,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 18:22:32,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 200 transitions. [2024-11-10 18:22:32,408 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-11-10 18:22:32,408 INFO L175 Difference]: Start difference. First operand has 68 places, 64 transitions, 180 flow. Second operand 5 states and 200 transitions. [2024-11-10 18:22:32,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 103 transitions, 444 flow [2024-11-10 18:22:32,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 103 transitions, 402 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-11-10 18:22:32,414 INFO L231 Difference]: Finished difference. Result has 67 places, 68 transitions, 188 flow [2024-11-10 18:22:32,414 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} [2024-11-10 18:22:32,416 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 0 predicate places. [2024-11-10 18:22:32,417 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 68 transitions, 188 flow [2024-11-10 18:22:32,417 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) [2024-11-10 18:22:32,417 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:22:32,417 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:22:32,418 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-10 18:22:32,418 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-10 18:22:32,418 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:22:32,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1182687483, now seen corresponding path program 1 times [2024-11-10 18:22:32,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:22:32,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50302066] [2024-11-10 18:22:32,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:22:32,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:22:32,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:22:32,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:22:32,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:22:32,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50302066] [2024-11-10 18:22:32,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50302066] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:22:32,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60018477] [2024-11-10 18:22:32,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:22:32,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:22:32,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:22:32,698 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:22:32,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-10 18:22:32,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:22:32,761 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-10 18:22:32,763 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:22:32,775 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-10 18:22:32,924 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-10 18:22:32,925 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 [2024-11-10 18:22:32,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:22:32,960 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:22:33,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:22:33,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60018477] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-10 18:22:33,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-10 18:22:33,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6, 3] total 11 [2024-11-10 18:22:33,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895251855] [2024-11-10 18:22:33,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:22:33,058 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 18:22:33,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:22:33,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 18:22:33,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-11-10 18:22:33,107 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 72 [2024-11-10 18:22:33,108 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) [2024-11-10 18:22:33,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:22:33,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 72 [2024-11-10 18:22:33,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:22:34,264 INFO L124 PetriNetUnfolderBase]: 7719/12081 cut-off events. [2024-11-10 18:22:34,265 INFO L125 PetriNetUnfolderBase]: For 211/211 co-relation queries the response was YES. [2024-11-10 18:22:34,293 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. [2024-11-10 18:22:34,361 INFO L140 encePairwiseOnDemand]: 66/72 looper letters, 77 selfloop transitions, 7 changer transitions 0/103 dead transitions. [2024-11-10 18:22:34,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 103 transitions, 437 flow [2024-11-10 18:22:34,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 18:22:34,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 18:22:34,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 197 transitions. [2024-11-10 18:22:34,363 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5472222222222223 [2024-11-10 18:22:34,363 INFO L175 Difference]: Start difference. First operand has 67 places, 68 transitions, 188 flow. Second operand 5 states and 197 transitions. [2024-11-10 18:22:34,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 103 transitions, 437 flow [2024-11-10 18:22:34,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 103 transitions, 432 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 18:22:34,369 INFO L231 Difference]: Finished difference. Result has 71 places, 69 transitions, 208 flow [2024-11-10 18:22:34,369 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} [2024-11-10 18:22:34,370 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 4 predicate places. [2024-11-10 18:22:34,370 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 69 transitions, 208 flow [2024-11-10 18:22:34,371 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) [2024-11-10 18:22:34,371 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:22:34,371 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:22:34,392 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-10 18:22:34,576 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 [2024-11-10 18:22:34,577 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-10 18:22:34,578 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:22:34,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1738418837, now seen corresponding path program 1 times [2024-11-10 18:22:34,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:22:34,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747625460] [2024-11-10 18:22:34,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:22:34,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:22:34,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:22:34,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:22:34,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:22:34,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747625460] [2024-11-10 18:22:34,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747625460] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:22:34,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:22:34,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-10 18:22:34,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058203850] [2024-11-10 18:22:34,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:22:34,672 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 18:22:34,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:22:34,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 18:22:34,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-10 18:22:34,701 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 72 [2024-11-10 18:22:34,701 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) [2024-11-10 18:22:34,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:22:34,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 72 [2024-11-10 18:22:34,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:22:35,578 INFO L124 PetriNetUnfolderBase]: 5351/8516 cut-off events. [2024-11-10 18:22:35,578 INFO L125 PetriNetUnfolderBase]: For 171/171 co-relation queries the response was YES. [2024-11-10 18:22:35,600 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. [2024-11-10 18:22:35,644 INFO L140 encePairwiseOnDemand]: 62/72 looper letters, 96 selfloop transitions, 11 changer transitions 0/122 dead transitions. [2024-11-10 18:22:35,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 122 transitions, 540 flow [2024-11-10 18:22:35,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 18:22:35,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-10 18:22:35,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 236 transitions. [2024-11-10 18:22:35,647 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5462962962962963 [2024-11-10 18:22:35,647 INFO L175 Difference]: Start difference. First operand has 71 places, 69 transitions, 208 flow. Second operand 6 states and 236 transitions. [2024-11-10 18:22:35,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 122 transitions, 540 flow [2024-11-10 18:22:35,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 122 transitions, 533 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:22:35,652 INFO L231 Difference]: Finished difference. Result has 76 places, 71 transitions, 239 flow [2024-11-10 18:22:35,652 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} [2024-11-10 18:22:35,653 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 9 predicate places. [2024-11-10 18:22:35,653 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 71 transitions, 239 flow [2024-11-10 18:22:35,654 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) [2024-11-10 18:22:35,654 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:22:35,654 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:22:35,654 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-10 18:22:35,654 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-10 18:22:35,655 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:22:35,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1826542496, now seen corresponding path program 1 times [2024-11-10 18:22:35,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:22:35,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827779069] [2024-11-10 18:22:35,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:22:35,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:22:35,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:22:35,766 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:22:35,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:22:35,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827779069] [2024-11-10 18:22:35,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827779069] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:22:35,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778904640] [2024-11-10 18:22:35,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:22:35,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:22:35,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:22:35,770 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:22:35,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-10 18:22:35,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:22:35,836 INFO L255 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-10 18:22:35,837 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:22:35,935 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:22:35,935 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:22:36,013 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:22:36,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778904640] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:22:36,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:22:36,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-10 18:22:36,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917608456] [2024-11-10 18:22:36,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:22:36,015 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-10 18:22:36,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:22:36,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-10 18:22:36,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2024-11-10 18:22:36,148 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 72 [2024-11-10 18:22:36,149 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) [2024-11-10 18:22:36,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:22:36,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 72 [2024-11-10 18:22:36,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:22:37,046 INFO L124 PetriNetUnfolderBase]: 6287/9978 cut-off events. [2024-11-10 18:22:37,047 INFO L125 PetriNetUnfolderBase]: For 1835/2017 co-relation queries the response was YES. [2024-11-10 18:22:37,082 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. [2024-11-10 18:22:37,151 INFO L140 encePairwiseOnDemand]: 63/72 looper letters, 76 selfloop transitions, 24 changer transitions 0/116 dead transitions. [2024-11-10 18:22:37,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 116 transitions, 571 flow [2024-11-10 18:22:37,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-10 18:22:37,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-10 18:22:37,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 351 transitions. [2024-11-10 18:22:37,154 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-11-10 18:22:37,155 INFO L175 Difference]: Start difference. First operand has 76 places, 71 transitions, 239 flow. Second operand 11 states and 351 transitions. [2024-11-10 18:22:37,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 116 transitions, 571 flow [2024-11-10 18:22:37,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 116 transitions, 551 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-10 18:22:37,195 INFO L231 Difference]: Finished difference. Result has 86 places, 80 transitions, 337 flow [2024-11-10 18:22:37,195 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} [2024-11-10 18:22:37,200 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 19 predicate places. [2024-11-10 18:22:37,200 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 80 transitions, 337 flow [2024-11-10 18:22:37,201 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) [2024-11-10 18:22:37,201 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:22:37,201 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:22:37,224 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-10 18:22:37,401 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 [2024-11-10 18:22:37,402 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-10 18:22:37,403 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:22:37,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1617939536, now seen corresponding path program 1 times [2024-11-10 18:22:37,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:22:37,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850245882] [2024-11-10 18:22:37,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:22:37,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:22:37,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:22:37,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:22:37,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:22:37,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850245882] [2024-11-10 18:22:37,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850245882] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:22:37,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:22:37,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:22:37,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53565520] [2024-11-10 18:22:37,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:22:37,501 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:22:37,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:22:37,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:22:37,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 18:22:37,515 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 72 [2024-11-10 18:22:37,515 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) [2024-11-10 18:22:37,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:22:37,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 72 [2024-11-10 18:22:37,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:22:38,109 INFO L124 PetriNetUnfolderBase]: 4900/7886 cut-off events. [2024-11-10 18:22:38,110 INFO L125 PetriNetUnfolderBase]: For 1670/1714 co-relation queries the response was YES. [2024-11-10 18:22:38,136 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. [2024-11-10 18:22:38,183 INFO L140 encePairwiseOnDemand]: 67/72 looper letters, 45 selfloop transitions, 9 changer transitions 0/78 dead transitions. [2024-11-10 18:22:38,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 78 transitions, 441 flow [2024-11-10 18:22:38,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 18:22:38,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 18:22:38,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 155 transitions. [2024-11-10 18:22:38,188 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4305555555555556 [2024-11-10 18:22:38,189 INFO L175 Difference]: Start difference. First operand has 86 places, 80 transitions, 337 flow. Second operand 5 states and 155 transitions. [2024-11-10 18:22:38,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 78 transitions, 441 flow [2024-11-10 18:22:38,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 78 transitions, 407 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-11-10 18:22:38,217 INFO L231 Difference]: Finished difference. Result has 86 places, 78 transitions, 317 flow [2024-11-10 18:22:38,218 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} [2024-11-10 18:22:38,219 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 19 predicate places. [2024-11-10 18:22:38,220 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 78 transitions, 317 flow [2024-11-10 18:22:38,220 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) [2024-11-10 18:22:38,221 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:22:38,221 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:22:38,221 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-10 18:22:38,221 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-10 18:22:38,222 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:22:38,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1617939535, now seen corresponding path program 1 times [2024-11-10 18:22:38,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:22:38,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698639726] [2024-11-10 18:22:38,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:22:38,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:22:38,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:22:38,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:22:38,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:22:38,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698639726] [2024-11-10 18:22:38,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698639726] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:22:38,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:22:38,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-10 18:22:38,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446411895] [2024-11-10 18:22:38,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:22:38,311 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 18:22:38,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:22:38,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 18:22:38,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-10 18:22:38,339 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 72 [2024-11-10 18:22:38,339 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) [2024-11-10 18:22:38,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:22:38,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 72 [2024-11-10 18:22:38,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:22:39,049 INFO L124 PetriNetUnfolderBase]: 4615/7260 cut-off events. [2024-11-10 18:22:39,051 INFO L125 PetriNetUnfolderBase]: For 1177/1497 co-relation queries the response was YES. [2024-11-10 18:22:39,069 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. [2024-11-10 18:22:39,110 INFO L140 encePairwiseOnDemand]: 62/72 looper letters, 84 selfloop transitions, 13 changer transitions 0/112 dead transitions. [2024-11-10 18:22:39,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 112 transitions, 607 flow [2024-11-10 18:22:39,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 18:22:39,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-10 18:22:39,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 217 transitions. [2024-11-10 18:22:39,113 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5023148148148148 [2024-11-10 18:22:39,113 INFO L175 Difference]: Start difference. First operand has 86 places, 78 transitions, 317 flow. Second operand 6 states and 217 transitions. [2024-11-10 18:22:39,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 112 transitions, 607 flow [2024-11-10 18:22:39,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 112 transitions, 594 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-10 18:22:39,118 INFO L231 Difference]: Finished difference. Result has 90 places, 80 transitions, 346 flow [2024-11-10 18:22:39,118 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} [2024-11-10 18:22:39,120 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 23 predicate places. [2024-11-10 18:22:39,120 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 80 transitions, 346 flow [2024-11-10 18:22:39,121 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) [2024-11-10 18:22:39,121 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:22:39,121 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-11-10 18:22:39,121 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-10 18:22:39,121 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-10 18:22:39,121 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:22:39,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1831113515, now seen corresponding path program 2 times [2024-11-10 18:22:39,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:22:39,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794553070] [2024-11-10 18:22:39,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:22:39,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:22:39,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:22:39,445 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:22:39,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:22:39,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794553070] [2024-11-10 18:22:39,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794553070] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:22:39,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806786917] [2024-11-10 18:22:39,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 18:22:39,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:22:39,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:22:39,449 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:22:39,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-10 18:22:39,539 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 18:22:39,539 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:22:39,540 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-10 18:22:39,543 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:22:39,625 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-10 18:22:39,790 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-10 18:22:39,791 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:22:39,994 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-10 18:22:39,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806786917] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:22:39,995 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:22:39,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 4] total 16 [2024-11-10 18:22:39,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239305724] [2024-11-10 18:22:39,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:22:39,996 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-10 18:22:39,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:22:39,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-10 18:22:39,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2024-11-10 18:22:40,436 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 72 [2024-11-10 18:22:40,437 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) [2024-11-10 18:22:40,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:22:40,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 72 [2024-11-10 18:22:40,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:22:42,372 INFO L124 PetriNetUnfolderBase]: 6078/9811 cut-off events. [2024-11-10 18:22:42,372 INFO L125 PetriNetUnfolderBase]: For 2339/2785 co-relation queries the response was YES. [2024-11-10 18:22:42,412 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. [2024-11-10 18:22:42,484 INFO L140 encePairwiseOnDemand]: 62/72 looper letters, 79 selfloop transitions, 33 changer transitions 0/127 dead transitions. [2024-11-10 18:22:42,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 127 transitions, 753 flow [2024-11-10 18:22:42,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-10 18:22:42,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-10 18:22:42,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 445 transitions. [2024-11-10 18:22:42,488 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3862847222222222 [2024-11-10 18:22:42,488 INFO L175 Difference]: Start difference. First operand has 90 places, 80 transitions, 346 flow. Second operand 16 states and 445 transitions. [2024-11-10 18:22:42,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 127 transitions, 753 flow [2024-11-10 18:22:42,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 127 transitions, 722 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-10 18:22:42,525 INFO L231 Difference]: Finished difference. Result has 105 places, 93 transitions, 504 flow [2024-11-10 18:22:42,526 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} [2024-11-10 18:22:42,527 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 38 predicate places. [2024-11-10 18:22:42,528 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 93 transitions, 504 flow [2024-11-10 18:22:42,528 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) [2024-11-10 18:22:42,529 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:22:42,529 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:22:42,548 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-10 18:22:42,733 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 [2024-11-10 18:22:42,734 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-10 18:22:42,734 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:22:42,734 INFO L85 PathProgramCache]: Analyzing trace with hash 425087046, now seen corresponding path program 1 times [2024-11-10 18:22:42,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:22:42,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562263413] [2024-11-10 18:22:42,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:22:42,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:22:42,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:22:42,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:22:42,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:22:42,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562263413] [2024-11-10 18:22:42,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562263413] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:22:42,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:22:42,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 18:22:42,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439360876] [2024-11-10 18:22:42,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:22:42,797 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:22:42,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:22:42,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:22:42,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-10 18:22:42,805 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 72 [2024-11-10 18:22:42,806 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) [2024-11-10 18:22:42,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:22:42,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 72 [2024-11-10 18:22:42,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:22:43,792 INFO L124 PetriNetUnfolderBase]: 8307/13739 cut-off events. [2024-11-10 18:22:43,792 INFO L125 PetriNetUnfolderBase]: For 2595/3258 co-relation queries the response was YES. [2024-11-10 18:22:43,848 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. [2024-11-10 18:22:43,929 INFO L140 encePairwiseOnDemand]: 68/72 looper letters, 106 selfloop transitions, 4 changer transitions 0/134 dead transitions. [2024-11-10 18:22:43,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 134 transitions, 842 flow [2024-11-10 18:22:43,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 18:22:43,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 18:22:43,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 173 transitions. [2024-11-10 18:22:43,931 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6006944444444444 [2024-11-10 18:22:43,931 INFO L175 Difference]: Start difference. First operand has 105 places, 93 transitions, 504 flow. Second operand 4 states and 173 transitions. [2024-11-10 18:22:43,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 134 transitions, 842 flow [2024-11-10 18:22:43,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 134 transitions, 827 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-11-10 18:22:43,948 INFO L231 Difference]: Finished difference. Result has 108 places, 96 transitions, 514 flow [2024-11-10 18:22:43,948 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} [2024-11-10 18:22:43,949 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 41 predicate places. [2024-11-10 18:22:43,949 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 96 transitions, 514 flow [2024-11-10 18:22:43,949 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) [2024-11-10 18:22:43,949 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:22:43,949 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:22:43,950 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-10 18:22:43,950 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-10 18:22:43,950 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:22:43,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1373032942, now seen corresponding path program 1 times [2024-11-10 18:22:43,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:22:43,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059492378] [2024-11-10 18:22:43,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:22:43,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:22:43,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:22:44,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:22:44,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:22:44,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059492378] [2024-11-10 18:22:44,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059492378] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:22:44,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73235175] [2024-11-10 18:22:44,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:22:44,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:22:44,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:22:44,192 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:22:44,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-10 18:22:44,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:22:44,267 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-10 18:22:44,270 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:22:44,283 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-10 18:22:44,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-10 18:22:44,389 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-10 18:22:44,389 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 [2024-11-10 18:22:44,417 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-10 18:22:44,418 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-10 18:22:44,706 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:22:44,706 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:22:45,088 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:22:45,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73235175] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-10 18:22:45,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-10 18:22:45,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 12 [2024-11-10 18:22:45,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179573371] [2024-11-10 18:22:45,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:22:45,092 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-10 18:22:45,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:22:45,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-10 18:22:45,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-11-10 18:22:45,200 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 72 [2024-11-10 18:22:45,201 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) [2024-11-10 18:22:45,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:22:45,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 72 [2024-11-10 18:22:45,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:22:46,520 INFO L124 PetriNetUnfolderBase]: 9437/15481 cut-off events. [2024-11-10 18:22:46,520 INFO L125 PetriNetUnfolderBase]: For 4627/5644 co-relation queries the response was YES. [2024-11-10 18:22:46,576 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. [2024-11-10 18:22:46,656 INFO L140 encePairwiseOnDemand]: 63/72 looper letters, 92 selfloop transitions, 18 changer transitions 0/135 dead transitions. [2024-11-10 18:22:46,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 135 transitions, 854 flow [2024-11-10 18:22:46,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-10 18:22:46,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-10 18:22:46,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 256 transitions. [2024-11-10 18:22:46,658 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5079365079365079 [2024-11-10 18:22:46,658 INFO L175 Difference]: Start difference. First operand has 108 places, 96 transitions, 514 flow. Second operand 7 states and 256 transitions. [2024-11-10 18:22:46,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 135 transitions, 854 flow [2024-11-10 18:22:46,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 135 transitions, 846 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-11-10 18:22:46,689 INFO L231 Difference]: Finished difference. Result has 116 places, 98 transitions, 570 flow [2024-11-10 18:22:46,689 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} [2024-11-10 18:22:46,691 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 49 predicate places. [2024-11-10 18:22:46,692 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 98 transitions, 570 flow [2024-11-10 18:22:46,692 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) [2024-11-10 18:22:46,692 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:22:46,693 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:22:46,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-10 18:22:46,896 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 [2024-11-10 18:22:46,897 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-10 18:22:46,897 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:22:46,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1625553623, now seen corresponding path program 1 times [2024-11-10 18:22:46,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:22:46,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201844501] [2024-11-10 18:22:46,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:22:46,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:22:46,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:22:47,137 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:22:47,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:22:47,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201844501] [2024-11-10 18:22:47,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201844501] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:22:47,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418016289] [2024-11-10 18:22:47,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:22:47,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:22:47,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:22:47,141 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:22:47,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-10 18:22:47,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:22:47,213 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-10 18:22:47,215 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:22:47,222 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-10 18:22:47,228 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-10 18:22:47,300 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-10 18:22:47,300 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-10 18:22:47,329 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 [2024-11-10 18:22:47,604 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:22:47,605 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:22:47,943 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:22:47,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418016289] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-10 18:22:47,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-10 18:22:47,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 13 [2024-11-10 18:22:47,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965466741] [2024-11-10 18:22:47,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:22:47,944 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-10 18:22:47,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:22:47,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-10 18:22:47,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2024-11-10 18:22:48,044 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 72 [2024-11-10 18:22:48,045 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) [2024-11-10 18:22:48,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:22:48,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 72 [2024-11-10 18:22:48,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:22:49,177 INFO L124 PetriNetUnfolderBase]: 9044/14467 cut-off events. [2024-11-10 18:22:49,178 INFO L125 PetriNetUnfolderBase]: For 15720/16938 co-relation queries the response was YES. [2024-11-10 18:22:49,228 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. [2024-11-10 18:22:49,307 INFO L140 encePairwiseOnDemand]: 63/72 looper letters, 89 selfloop transitions, 18 changer transitions 0/132 dead transitions. [2024-11-10 18:22:49,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 132 transitions, 906 flow [2024-11-10 18:22:49,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-10 18:22:49,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-10 18:22:49,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 251 transitions. [2024-11-10 18:22:49,310 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.498015873015873 [2024-11-10 18:22:49,310 INFO L175 Difference]: Start difference. First operand has 116 places, 98 transitions, 570 flow. Second operand 7 states and 251 transitions. [2024-11-10 18:22:49,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 132 transitions, 906 flow [2024-11-10 18:22:49,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 132 transitions, 890 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-10 18:22:49,333 INFO L231 Difference]: Finished difference. Result has 121 places, 100 transitions, 616 flow [2024-11-10 18:22:49,334 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} [2024-11-10 18:22:49,334 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 54 predicate places. [2024-11-10 18:22:49,334 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 100 transitions, 616 flow [2024-11-10 18:22:49,335 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) [2024-11-10 18:22:49,335 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:22:49,335 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:22:49,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-10 18:22:49,535 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 [2024-11-10 18:22:49,536 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-10 18:22:49,536 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:22:49,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1147444743, now seen corresponding path program 1 times [2024-11-10 18:22:49,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:22:49,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429386843] [2024-11-10 18:22:49,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:22:49,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:22:49,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:22:49,740 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:22:49,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:22:49,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429386843] [2024-11-10 18:22:49,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429386843] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:22:49,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763492768] [2024-11-10 18:22:49,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:22:49,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:22:49,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:22:49,743 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:22:49,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-10 18:22:49,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:22:49,820 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-10 18:22:49,821 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:22:49,915 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:22:49,915 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:22:49,968 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-10 18:22:49,979 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:22:49,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763492768] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:22:49,979 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:22:49,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2024-11-10 18:22:49,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849934699] [2024-11-10 18:22:49,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:22:49,980 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-10 18:22:49,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:22:49,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-10 18:22:49,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-11-10 18:22:50,081 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 72 [2024-11-10 18:22:50,082 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) [2024-11-10 18:22:50,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:22:50,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 72 [2024-11-10 18:22:50,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:22:51,638 INFO L124 PetriNetUnfolderBase]: 9491/15421 cut-off events. [2024-11-10 18:22:51,639 INFO L125 PetriNetUnfolderBase]: For 19172/20279 co-relation queries the response was YES. [2024-11-10 18:22:51,697 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. [2024-11-10 18:22:51,771 INFO L140 encePairwiseOnDemand]: 62/72 looper letters, 109 selfloop transitions, 19 changer transitions 0/153 dead transitions. [2024-11-10 18:22:51,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 153 transitions, 1062 flow [2024-11-10 18:22:51,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-10 18:22:51,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-10 18:22:51,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 274 transitions. [2024-11-10 18:22:51,773 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5436507936507936 [2024-11-10 18:22:51,773 INFO L175 Difference]: Start difference. First operand has 121 places, 100 transitions, 616 flow. Second operand 7 states and 274 transitions. [2024-11-10 18:22:51,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 153 transitions, 1062 flow [2024-11-10 18:22:51,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 153 transitions, 1032 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-11-10 18:22:51,797 INFO L231 Difference]: Finished difference. Result has 124 places, 102 transitions, 648 flow [2024-11-10 18:22:51,797 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} [2024-11-10 18:22:51,798 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 57 predicate places. [2024-11-10 18:22:51,798 INFO L471 AbstractCegarLoop]: Abstraction has has 124 places, 102 transitions, 648 flow [2024-11-10 18:22:51,798 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) [2024-11-10 18:22:51,798 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:22:51,798 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:22:51,812 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-10 18:22:51,999 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 [2024-11-10 18:22:52,000 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-10 18:22:52,000 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:22:52,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1147444744, now seen corresponding path program 1 times [2024-11-10 18:22:52,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:22:52,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079780290] [2024-11-10 18:22:52,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:22:52,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:22:52,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:22:52,063 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:22:52,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:22:52,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079780290] [2024-11-10 18:22:52,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079780290] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:22:52,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:22:52,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 18:22:52,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668119029] [2024-11-10 18:22:52,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:22:52,066 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:22:52,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:22:52,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:22:52,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 18:22:52,079 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 72 [2024-11-10 18:22:52,079 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) [2024-11-10 18:22:52,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:22:52,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 72 [2024-11-10 18:22:52,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:22:53,197 INFO L124 PetriNetUnfolderBase]: 7469/12502 cut-off events. [2024-11-10 18:22:53,197 INFO L125 PetriNetUnfolderBase]: For 21264/22032 co-relation queries the response was YES. [2024-11-10 18:22:53,250 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. [2024-11-10 18:22:53,305 INFO L140 encePairwiseOnDemand]: 68/72 looper letters, 68 selfloop transitions, 7 changer transitions 0/100 dead transitions. [2024-11-10 18:22:53,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 100 transitions, 794 flow [2024-11-10 18:22:53,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 18:22:53,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 18:22:53,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 130 transitions. [2024-11-10 18:22:53,307 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4513888888888889 [2024-11-10 18:22:53,307 INFO L175 Difference]: Start difference. First operand has 124 places, 102 transitions, 648 flow. Second operand 4 states and 130 transitions. [2024-11-10 18:22:53,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 100 transitions, 794 flow [2024-11-10 18:22:53,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 100 transitions, 765 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-10 18:22:53,337 INFO L231 Difference]: Finished difference. Result has 121 places, 100 transitions, 629 flow [2024-11-10 18:22:53,338 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} [2024-11-10 18:22:53,338 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 54 predicate places. [2024-11-10 18:22:53,339 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 100 transitions, 629 flow [2024-11-10 18:22:53,339 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) [2024-11-10 18:22:53,339 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:22:53,339 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:22:53,339 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-10 18:22:53,339 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-10 18:22:53,340 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:22:53,340 INFO L85 PathProgramCache]: Analyzing trace with hash -71102610, now seen corresponding path program 1 times [2024-11-10 18:22:53,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:22:53,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595032737] [2024-11-10 18:22:53,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:22:53,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:22:53,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:22:53,438 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:22:53,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:22:53,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595032737] [2024-11-10 18:22:53,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595032737] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:22:53,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824277625] [2024-11-10 18:22:53,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:22:53,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:22:53,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:22:53,441 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:22:53,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-10 18:22:53,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:22:53,519 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-10 18:22:53,520 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:22:53,596 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:22:53,597 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:22:53,662 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:22:53,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824277625] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:22:53,663 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:22:53,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-10 18:22:53,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386118836] [2024-11-10 18:22:53,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:22:53,664 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-10 18:22:53,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:22:53,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-10 18:22:53,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-11-10 18:22:53,765 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 72 [2024-11-10 18:22:53,766 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) [2024-11-10 18:22:53,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:22:53,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 72 [2024-11-10 18:22:53,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:22:55,375 INFO L124 PetriNetUnfolderBase]: 11052/17703 cut-off events. [2024-11-10 18:22:55,375 INFO L125 PetriNetUnfolderBase]: For 22574/22828 co-relation queries the response was YES. [2024-11-10 18:22:55,466 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. [2024-11-10 18:22:55,545 INFO L140 encePairwiseOnDemand]: 58/72 looper letters, 198 selfloop transitions, 39 changer transitions 0/250 dead transitions. [2024-11-10 18:22:55,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 250 transitions, 1775 flow [2024-11-10 18:22:55,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-10 18:22:55,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-10 18:22:55,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 421 transitions. [2024-11-10 18:22:55,547 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48726851851851855 [2024-11-10 18:22:55,547 INFO L175 Difference]: Start difference. First operand has 121 places, 100 transitions, 629 flow. Second operand 12 states and 421 transitions. [2024-11-10 18:22:55,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 250 transitions, 1775 flow [2024-11-10 18:22:55,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 250 transitions, 1767 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:22:55,589 INFO L231 Difference]: Finished difference. Result has 133 places, 106 transitions, 752 flow [2024-11-10 18:22:55,589 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} [2024-11-10 18:22:55,589 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 66 predicate places. [2024-11-10 18:22:55,590 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 106 transitions, 752 flow [2024-11-10 18:22:55,590 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) [2024-11-10 18:22:55,590 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:22:55,590 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] [2024-11-10 18:22:55,610 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-10 18:22:55,791 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 [2024-11-10 18:22:55,791 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-10 18:22:55,791 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:22:55,792 INFO L85 PathProgramCache]: Analyzing trace with hash 2016066449, now seen corresponding path program 1 times [2024-11-10 18:22:55,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:22:55,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589178823] [2024-11-10 18:22:55,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:22:55,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:22:55,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:22:55,888 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:22:55,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:22:55,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589178823] [2024-11-10 18:22:55,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589178823] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:22:55,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408458289] [2024-11-10 18:22:55,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:22:55,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:22:55,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:22:55,891 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:22:55,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-10 18:22:55,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:22:56,001 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-10 18:22:56,002 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:22:56,085 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:22:56,085 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:22:56,143 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:22:56,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408458289] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:22:56,144 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:22:56,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-10 18:22:56,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991805365] [2024-11-10 18:22:56,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:22:56,144 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-10 18:22:56,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:22:56,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-10 18:22:56,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-11-10 18:22:56,252 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 72 [2024-11-10 18:22:56,253 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) [2024-11-10 18:22:56,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:22:56,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 72 [2024-11-10 18:22:56,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:22:57,537 INFO L124 PetriNetUnfolderBase]: 7846/12345 cut-off events. [2024-11-10 18:22:57,537 INFO L125 PetriNetUnfolderBase]: For 25732/26640 co-relation queries the response was YES. [2024-11-10 18:22:57,663 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. [2024-11-10 18:22:57,741 INFO L140 encePairwiseOnDemand]: 58/72 looper letters, 148 selfloop transitions, 39 changer transitions 0/202 dead transitions. [2024-11-10 18:22:57,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 202 transitions, 1581 flow [2024-11-10 18:22:57,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-10 18:22:57,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-10 18:22:57,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 396 transitions. [2024-11-10 18:22:57,743 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-11-10 18:22:57,743 INFO L175 Difference]: Start difference. First operand has 133 places, 106 transitions, 752 flow. Second operand 12 states and 396 transitions. [2024-11-10 18:22:57,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 202 transitions, 1581 flow [2024-11-10 18:22:57,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 202 transitions, 1519 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-11-10 18:22:57,785 INFO L231 Difference]: Finished difference. Result has 142 places, 112 transitions, 846 flow [2024-11-10 18:22:57,785 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} [2024-11-10 18:22:57,786 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 75 predicate places. [2024-11-10 18:22:57,786 INFO L471 AbstractCegarLoop]: Abstraction has has 142 places, 112 transitions, 846 flow [2024-11-10 18:22:57,786 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) [2024-11-10 18:22:57,787 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:22:57,787 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:22:57,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-10 18:22:57,987 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 [2024-11-10 18:22:57,988 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-10 18:22:57,988 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:22:57,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1635460168, now seen corresponding path program 2 times [2024-11-10 18:22:57,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:22:57,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129824408] [2024-11-10 18:22:57,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:22:57,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:22:58,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:22:58,306 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-10 18:22:58,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:22:58,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129824408] [2024-11-10 18:22:58,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129824408] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:22:58,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289919881] [2024-11-10 18:22:58,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 18:22:58,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:22:58,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:22:58,309 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:22:58,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-10 18:22:58,394 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 18:22:58,395 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:22:58,396 INFO L255 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-10 18:22:58,398 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:22:58,402 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-10 18:22:58,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 18:22:58,490 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-10 18:22:58,497 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-10 18:22:58,497 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-10 18:22:58,611 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-10 18:22:58,611 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:22:58,799 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2024-11-10 18:22:58,939 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-10 18:22:58,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289919881] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:22:58,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:22:58,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 19 [2024-11-10 18:22:58,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917792023] [2024-11-10 18:22:58,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:22:58,940 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-10 18:22:58,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:22:58,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-10 18:22:58,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2024-11-10 18:22:59,215 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 72 [2024-11-10 18:22:59,215 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) [2024-11-10 18:22:59,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:22:59,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 72 [2024-11-10 18:22:59,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:23:01,368 INFO L124 PetriNetUnfolderBase]: 9521/17264 cut-off events. [2024-11-10 18:23:01,369 INFO L125 PetriNetUnfolderBase]: For 33905/34285 co-relation queries the response was YES. [2024-11-10 18:23:01,511 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. [2024-11-10 18:23:01,592 INFO L140 encePairwiseOnDemand]: 62/72 looper letters, 199 selfloop transitions, 33 changer transitions 0/261 dead transitions. [2024-11-10 18:23:01,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 261 transitions, 2150 flow [2024-11-10 18:23:01,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-10 18:23:01,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-10 18:23:01,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 458 transitions. [2024-11-10 18:23:01,595 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4893162393162393 [2024-11-10 18:23:01,595 INFO L175 Difference]: Start difference. First operand has 142 places, 112 transitions, 846 flow. Second operand 13 states and 458 transitions. [2024-11-10 18:23:01,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 261 transitions, 2150 flow [2024-11-10 18:23:01,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 261 transitions, 2075 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-11-10 18:23:01,682 INFO L231 Difference]: Finished difference. Result has 153 places, 124 transitions, 1023 flow [2024-11-10 18:23:01,683 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} [2024-11-10 18:23:01,683 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 86 predicate places. [2024-11-10 18:23:01,684 INFO L471 AbstractCegarLoop]: Abstraction has has 153 places, 124 transitions, 1023 flow [2024-11-10 18:23:01,684 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) [2024-11-10 18:23:01,684 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:23:01,684 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] [2024-11-10 18:23:01,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-10 18:23:01,885 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 [2024-11-10 18:23:01,885 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-10 18:23:01,885 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:23:01,885 INFO L85 PathProgramCache]: Analyzing trace with hash -395919885, now seen corresponding path program 1 times [2024-11-10 18:23:01,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:23:01,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972520157] [2024-11-10 18:23:01,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:23:01,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:23:01,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:23:01,969 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 18:23:01,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:23:01,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972520157] [2024-11-10 18:23:01,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972520157] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:23:01,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:23:01,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-10 18:23:01,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311926564] [2024-11-10 18:23:01,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:23:01,971 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 18:23:01,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:23:01,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 18:23:01,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-10 18:23:01,989 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 72 [2024-11-10 18:23:01,989 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) [2024-11-10 18:23:01,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:23:01,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 72 [2024-11-10 18:23:01,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:23:05,209 INFO L124 PetriNetUnfolderBase]: 18877/31670 cut-off events. [2024-11-10 18:23:05,210 INFO L125 PetriNetUnfolderBase]: For 117892/118517 co-relation queries the response was YES. [2024-11-10 18:23:05,472 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. [2024-11-10 18:23:05,995 INFO L140 encePairwiseOnDemand]: 65/72 looper letters, 227 selfloop transitions, 13 changer transitions 0/268 dead transitions. [2024-11-10 18:23:05,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 268 transitions, 2743 flow [2024-11-10 18:23:05,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 18:23:05,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-10 18:23:05,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 245 transitions. [2024-11-10 18:23:05,997 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5671296296296297 [2024-11-10 18:23:05,997 INFO L175 Difference]: Start difference. First operand has 153 places, 124 transitions, 1023 flow. Second operand 6 states and 245 transitions. [2024-11-10 18:23:05,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 268 transitions, 2743 flow [2024-11-10 18:23:06,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 268 transitions, 2708 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-11-10 18:23:06,096 INFO L231 Difference]: Finished difference. Result has 159 places, 135 transitions, 1180 flow [2024-11-10 18:23:06,096 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} [2024-11-10 18:23:06,096 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 92 predicate places. [2024-11-10 18:23:06,096 INFO L471 AbstractCegarLoop]: Abstraction has has 159 places, 135 transitions, 1180 flow [2024-11-10 18:23:06,097 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) [2024-11-10 18:23:06,097 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:23:06,097 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] [2024-11-10 18:23:06,097 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-10 18:23:06,097 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-10 18:23:06,097 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:23:06,098 INFO L85 PathProgramCache]: Analyzing trace with hash -814020251, now seen corresponding path program 2 times [2024-11-10 18:23:06,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:23:06,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496343680] [2024-11-10 18:23:06,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:23:06,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:23:06,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:23:06,180 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 18:23:06,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:23:06,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496343680] [2024-11-10 18:23:06,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496343680] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:23:06,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:23:06,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-10 18:23:06,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741956598] [2024-11-10 18:23:06,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:23:06,182 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 18:23:06,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:23:06,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 18:23:06,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-10 18:23:06,203 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 72 [2024-11-10 18:23:06,204 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) [2024-11-10 18:23:06,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:23:06,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 72 [2024-11-10 18:23:06,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:23:10,508 INFO L124 PetriNetUnfolderBase]: 20321/34476 cut-off events. [2024-11-10 18:23:10,508 INFO L125 PetriNetUnfolderBase]: For 140924/141899 co-relation queries the response was YES. [2024-11-10 18:23:10,784 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. [2024-11-10 18:23:10,968 INFO L140 encePairwiseOnDemand]: 65/72 looper letters, 212 selfloop transitions, 28 changer transitions 0/268 dead transitions. [2024-11-10 18:23:10,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 268 transitions, 2817 flow [2024-11-10 18:23:10,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 18:23:10,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-10 18:23:10,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 248 transitions. [2024-11-10 18:23:10,970 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5740740740740741 [2024-11-10 18:23:10,970 INFO L175 Difference]: Start difference. First operand has 159 places, 135 transitions, 1180 flow. Second operand 6 states and 248 transitions. [2024-11-10 18:23:10,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 268 transitions, 2817 flow [2024-11-10 18:23:11,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 268 transitions, 2809 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-10 18:23:11,151 INFO L231 Difference]: Finished difference. Result has 167 places, 146 transitions, 1396 flow [2024-11-10 18:23:11,151 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} [2024-11-10 18:23:11,152 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 100 predicate places. [2024-11-10 18:23:11,152 INFO L471 AbstractCegarLoop]: Abstraction has has 167 places, 146 transitions, 1396 flow [2024-11-10 18:23:11,152 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) [2024-11-10 18:23:11,152 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:23:11,152 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] [2024-11-10 18:23:11,153 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-10 18:23:11,153 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-10 18:23:11,153 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:23:11,153 INFO L85 PathProgramCache]: Analyzing trace with hash -869431511, now seen corresponding path program 3 times [2024-11-10 18:23:11,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:23:11,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132018793] [2024-11-10 18:23:11,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:23:11,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:23:11,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:23:11,231 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 18:23:11,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:23:11,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132018793] [2024-11-10 18:23:11,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132018793] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:23:11,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:23:11,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-10 18:23:11,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447282376] [2024-11-10 18:23:11,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:23:11,233 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 18:23:11,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:23:11,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 18:23:11,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-10 18:23:11,252 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 72 [2024-11-10 18:23:11,253 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) [2024-11-10 18:23:11,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:23:11,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 72 [2024-11-10 18:23:11,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:23:15,566 INFO L124 PetriNetUnfolderBase]: 20139/33990 cut-off events. [2024-11-10 18:23:15,566 INFO L125 PetriNetUnfolderBase]: For 155213/155932 co-relation queries the response was YES. [2024-11-10 18:23:15,812 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. [2024-11-10 18:23:16,213 INFO L140 encePairwiseOnDemand]: 65/72 looper letters, 202 selfloop transitions, 32 changer transitions 0/262 dead transitions. [2024-11-10 18:23:16,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 262 transitions, 2851 flow [2024-11-10 18:23:16,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 18:23:16,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-10 18:23:16,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 246 transitions. [2024-11-10 18:23:16,214 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5694444444444444 [2024-11-10 18:23:16,214 INFO L175 Difference]: Start difference. First operand has 167 places, 146 transitions, 1396 flow. Second operand 6 states and 246 transitions. [2024-11-10 18:23:16,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 262 transitions, 2851 flow [2024-11-10 18:23:16,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 262 transitions, 2799 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-11-10 18:23:16,457 INFO L231 Difference]: Finished difference. Result has 173 places, 148 transitions, 1481 flow [2024-11-10 18:23:16,457 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} [2024-11-10 18:23:16,457 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 106 predicate places. [2024-11-10 18:23:16,458 INFO L471 AbstractCegarLoop]: Abstraction has has 173 places, 148 transitions, 1481 flow [2024-11-10 18:23:16,458 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) [2024-11-10 18:23:16,458 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:23:16,458 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] [2024-11-10 18:23:16,458 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-11-10 18:23:16,458 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-10 18:23:16,458 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:23:16,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1232496965, now seen corresponding path program 1 times [2024-11-10 18:23:16,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:23:16,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255390174] [2024-11-10 18:23:16,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:23:16,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:23:16,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:23:16,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:23:16,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:23:16,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255390174] [2024-11-10 18:23:16,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255390174] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:23:16,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:23:16,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 18:23:16,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388153399] [2024-11-10 18:23:16,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:23:16,700 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:23:16,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:23:16,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:23:16,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-10 18:23:16,728 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 72 [2024-11-10 18:23:16,728 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) [2024-11-10 18:23:16,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:23:16,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 72 [2024-11-10 18:23:16,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:23:21,021 INFO L124 PetriNetUnfolderBase]: 18709/32686 cut-off events. [2024-11-10 18:23:21,022 INFO L125 PetriNetUnfolderBase]: For 163461/163926 co-relation queries the response was YES. [2024-11-10 18:23:21,234 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. [2024-11-10 18:23:21,372 INFO L140 encePairwiseOnDemand]: 68/72 looper letters, 124 selfloop transitions, 2 changer transitions 23/168 dead transitions. [2024-11-10 18:23:21,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 168 transitions, 1943 flow [2024-11-10 18:23:21,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 18:23:21,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 18:23:21,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 152 transitions. [2024-11-10 18:23:21,373 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2024-11-10 18:23:21,373 INFO L175 Difference]: Start difference. First operand has 173 places, 148 transitions, 1481 flow. Second operand 4 states and 152 transitions. [2024-11-10 18:23:21,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 168 transitions, 1943 flow [2024-11-10 18:23:21,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 168 transitions, 1853 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-11-10 18:23:21,657 INFO L231 Difference]: Finished difference. Result has 173 places, 145 transitions, 1382 flow [2024-11-10 18:23:21,658 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} [2024-11-10 18:23:21,658 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 106 predicate places. [2024-11-10 18:23:21,658 INFO L471 AbstractCegarLoop]: Abstraction has has 173 places, 145 transitions, 1382 flow [2024-11-10 18:23:21,658 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) [2024-11-10 18:23:21,658 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:23:21,659 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:23:21,659 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-11-10 18:23:21,659 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-10 18:23:21,659 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:23:21,659 INFO L85 PathProgramCache]: Analyzing trace with hash 740489892, now seen corresponding path program 3 times [2024-11-10 18:23:21,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:23:21,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479911757] [2024-11-10 18:23:21,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:23:21,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:23:21,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:23:21,777 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-10 18:23:21,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:23:21,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479911757] [2024-11-10 18:23:21,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479911757] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:23:21,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342994832] [2024-11-10 18:23:21,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-10 18:23:21,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:23:21,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:23:21,781 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:23:21,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-10 18:23:21,863 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-10 18:23:21,864 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:23:21,865 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-10 18:23:21,867 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:23:21,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-10 18:23:21,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 18:23:21,956 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 [2024-11-10 18:23:21,967 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-10 18:23:21,967 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-10 18:23:22,061 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-10 18:23:22,062 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:23:22,339 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 [2024-11-10 18:23:22,406 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-10 18:23:22,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342994832] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:23:22,407 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:23:22,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 22 [2024-11-10 18:23:22,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481842562] [2024-11-10 18:23:22,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:23:22,407 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-10 18:23:22,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:23:22,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-10 18:23:22,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2024-11-10 18:23:22,949 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 72 [2024-11-10 18:23:22,950 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) [2024-11-10 18:23:22,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:23:22,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 72 [2024-11-10 18:23:22,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:23:29,854 INFO L124 PetriNetUnfolderBase]: 27401/43606 cut-off events. [2024-11-10 18:23:29,855 INFO L125 PetriNetUnfolderBase]: For 139806/140255 co-relation queries the response was YES. [2024-11-10 18:23:30,209 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. [2024-11-10 18:23:30,396 INFO L140 encePairwiseOnDemand]: 57/72 looper letters, 642 selfloop transitions, 62 changer transitions 0/719 dead transitions. [2024-11-10 18:23:30,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 719 transitions, 7914 flow [2024-11-10 18:23:30,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-10 18:23:30,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-11-10 18:23:30,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 872 transitions. [2024-11-10 18:23:30,399 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41762452107279696 [2024-11-10 18:23:30,399 INFO L175 Difference]: Start difference. First operand has 173 places, 145 transitions, 1382 flow. Second operand 29 states and 872 transitions. [2024-11-10 18:23:30,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 719 transitions, 7914 flow [2024-11-10 18:23:30,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 719 transitions, 7842 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-11-10 18:23:30,879 INFO L231 Difference]: Finished difference. Result has 196 places, 158 transitions, 1619 flow [2024-11-10 18:23:30,880 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} [2024-11-10 18:23:30,880 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 129 predicate places. [2024-11-10 18:23:30,880 INFO L471 AbstractCegarLoop]: Abstraction has has 196 places, 158 transitions, 1619 flow [2024-11-10 18:23:30,881 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) [2024-11-10 18:23:30,881 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:23:30,881 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] [2024-11-10 18:23:30,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-10 18:23:31,081 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 [2024-11-10 18:23:31,082 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-10 18:23:31,082 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:23:31,082 INFO L85 PathProgramCache]: Analyzing trace with hash 2053086967, now seen corresponding path program 2 times [2024-11-10 18:23:31,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:23:31,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363343873] [2024-11-10 18:23:31,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:23:31,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:23:31,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:23:31,314 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-10 18:23:31,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:23:31,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363343873] [2024-11-10 18:23:31,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363343873] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:23:31,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602523320] [2024-11-10 18:23:31,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 18:23:31,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:23:31,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:23:31,317 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:23:31,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-10 18:23:31,406 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 18:23:31,406 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:23:31,408 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-10 18:23:31,410 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:23:31,418 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 [2024-11-10 18:23:31,508 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2024-11-10 18:23:31,508 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 [2024-11-10 18:23:32,465 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:23:32,466 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:23:32,820 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-10 18:23:32,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602523320] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:23:32,820 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:23:32,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 6] total 20 [2024-11-10 18:23:32,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820821169] [2024-11-10 18:23:32,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:23:32,822 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-10 18:23:32,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:23:32,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-10 18:23:32,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2024-11-10 18:23:33,204 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 72 [2024-11-10 18:23:33,205 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) [2024-11-10 18:23:33,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:23:33,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 72 [2024-11-10 18:23:33,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand