./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 3289d67d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.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 20832c4ec3f8ccecbcf7cfcec0aecbbc925bfb9e6d8397db46b5825bb40681b3 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-17 03:36:55,418 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-17 03:36:55,504 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-17 03:36:55,510 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-17 03:36:55,511 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-17 03:36:55,550 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-17 03:36:55,551 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-17 03:36:55,551 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-17 03:36:55,552 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-17 03:36:55,553 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-17 03:36:55,555 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-17 03:36:55,555 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-17 03:36:55,556 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-17 03:36:55,556 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-17 03:36:55,556 INFO L153 SettingsManager]: * Use SBE=true [2024-11-17 03:36:55,557 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-17 03:36:55,557 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-17 03:36:55,557 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-17 03:36:55,557 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-17 03:36:55,558 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-17 03:36:55,558 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-17 03:36:55,562 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-17 03:36:55,562 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-17 03:36:55,562 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-17 03:36:55,562 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-17 03:36:55,563 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-17 03:36:55,563 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-17 03:36:55,563 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-17 03:36:55,563 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-17 03:36:55,563 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-17 03:36:55,564 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-17 03:36:55,564 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-17 03:36:55,564 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-17 03:36:55,564 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:36:55,565 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-17 03:36:55,565 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-17 03:36:55,565 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-17 03:36:55,566 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-17 03:36:55,566 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-17 03:36:55,567 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-17 03:36:55,567 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-17 03:36:55,568 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-17 03:36:55,568 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 20832c4ec3f8ccecbcf7cfcec0aecbbc925bfb9e6d8397db46b5825bb40681b3 [2024-11-17 03:36:55,832 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-17 03:36:55,857 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-17 03:36:55,860 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-17 03:36:55,862 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-17 03:36:55,862 INFO L274 PluginConnector]: CDTParser initialized [2024-11-17 03:36:55,863 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c [2024-11-17 03:36:57,353 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-17 03:36:57,560 INFO L384 CDTParser]: Found 1 translation units. [2024-11-17 03:36:57,561 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c [2024-11-17 03:36:57,569 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d792fb99/c2e8270c5d8d44cfb39127bc4ba91157/FLAG8d2e9954b [2024-11-17 03:36:57,582 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d792fb99/c2e8270c5d8d44cfb39127bc4ba91157 [2024-11-17 03:36:57,584 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-17 03:36:57,585 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-17 03:36:57,587 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-17 03:36:57,587 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-17 03:36:57,591 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-17 03:36:57,592 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:36:57" (1/1) ... [2024-11-17 03:36:57,593 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58d9b3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:57, skipping insertion in model container [2024-11-17 03:36:57,593 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:36:57" (1/1) ... [2024-11-17 03:36:57,620 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-17 03:36:57,840 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-17 03:36:57,844 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:36:57,859 INFO L200 MainTranslator]: Completed pre-run [2024-11-17 03:36:57,892 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:36:57,913 INFO L204 MainTranslator]: Completed translation [2024-11-17 03:36:57,913 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:57 WrapperNode [2024-11-17 03:36:57,914 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-17 03:36:57,915 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-17 03:36:57,916 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-17 03:36:57,916 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-17 03:36:57,923 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:57" (1/1) ... [2024-11-17 03:36:57,937 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:57" (1/1) ... [2024-11-17 03:36:57,978 INFO L138 Inliner]: procedures = 25, calls = 31, calls flagged for inlining = 16, calls inlined = 28, statements flattened = 261 [2024-11-17 03:36:57,981 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-17 03:36:57,982 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-17 03:36:57,982 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-17 03:36:57,982 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-17 03:36:57,993 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:57" (1/1) ... [2024-11-17 03:36:57,994 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:57" (1/1) ... [2024-11-17 03:36:57,997 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:57" (1/1) ... [2024-11-17 03:36:58,025 INFO L175 MemorySlicer]: Split 11 memory accesses to 2 slices as follows [2, 9]. 82 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 4 writes are split as follows [0, 4]. [2024-11-17 03:36:58,028 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:57" (1/1) ... [2024-11-17 03:36:58,028 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:57" (1/1) ... [2024-11-17 03:36:58,043 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:57" (1/1) ... [2024-11-17 03:36:58,044 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:57" (1/1) ... [2024-11-17 03:36:58,045 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:57" (1/1) ... [2024-11-17 03:36:58,051 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:57" (1/1) ... [2024-11-17 03:36:58,057 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-17 03:36:58,058 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-17 03:36:58,058 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-17 03:36:58,058 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-17 03:36:58,059 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:57" (1/1) ... [2024-11-17 03:36:58,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:36:58,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:36:58,093 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-17 03:36:58,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-17 03:36:58,143 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-17 03:36:58,144 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-17 03:36:58,144 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-17 03:36:58,144 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-17 03:36:58,145 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-17 03:36:58,145 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-17 03:36:58,145 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-17 03:36:58,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-17 03:36:58,146 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-17 03:36:58,146 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-17 03:36:58,146 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-17 03:36:58,146 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-17 03:36:58,146 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-17 03:36:58,146 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-17 03:36:58,146 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-17 03:36:58,146 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-17 03:36:58,148 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-17 03:36:58,269 INFO L256 CfgBuilder]: Building ICFG [2024-11-17 03:36:58,272 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-17 03:36:58,775 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-17 03:36:58,775 INFO L307 CfgBuilder]: Performing block encoding [2024-11-17 03:36:59,161 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-17 03:36:59,161 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-17 03:36:59,162 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:36:59 BoogieIcfgContainer [2024-11-17 03:36:59,162 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-17 03:36:59,165 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-17 03:36:59,165 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-17 03:36:59,169 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-17 03:36:59,170 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:36:57" (1/3) ... [2024-11-17 03:36:59,170 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5724c63c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:36:59, skipping insertion in model container [2024-11-17 03:36:59,171 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:57" (2/3) ... [2024-11-17 03:36:59,173 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5724c63c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:36:59, skipping insertion in model container [2024-11-17 03:36:59,173 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:36:59" (3/3) ... [2024-11-17 03:36:59,175 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-three-array-sum-alt.wvr.c [2024-11-17 03:36:59,193 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-17 03:36:59,194 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2024-11-17 03:36:59,194 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-17 03:36:59,257 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-17 03:36:59,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 78 transitions, 177 flow [2024-11-17 03:36:59,331 INFO L124 PetriNetUnfolderBase]: 12/75 cut-off events. [2024-11-17 03:36:59,331 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-17 03:36:59,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88 conditions, 75 events. 12/75 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 152 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 51. Up to 2 conditions per place. [2024-11-17 03:36:59,336 INFO L82 GeneralOperation]: Start removeDead. Operand has 76 places, 78 transitions, 177 flow [2024-11-17 03:36:59,341 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 72 places, 74 transitions, 166 flow [2024-11-17 03:36:59,354 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-17 03:36:59,364 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;@6a4869e8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-17 03:36:59,365 INFO L334 AbstractCegarLoop]: Starting to check reachability of 35 error locations. [2024-11-17 03:36:59,370 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-17 03:36:59,374 INFO L124 PetriNetUnfolderBase]: 2/7 cut-off events. [2024-11-17 03:36:59,374 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-17 03:36:59,374 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:36:59,375 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:36:59,375 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-17 03:36:59,380 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:36:59,381 INFO L85 PathProgramCache]: Analyzing trace with hash 24770158, now seen corresponding path program 1 times [2024-11-17 03:36:59,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:36:59,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740114981] [2024-11-17 03:36:59,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:36:59,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:36:59,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:36:59,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:36:59,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:36:59,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740114981] [2024-11-17 03:36:59,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740114981] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:36:59,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:36:59,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-17 03:36:59,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657226706] [2024-11-17 03:36:59,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:36:59,683 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:36:59,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:36:59,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:36:59,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:36:59,757 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 78 [2024-11-17 03:36:59,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 74 transitions, 166 flow. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:36:59,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:36:59,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 78 [2024-11-17 03:36:59,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:37:00,035 INFO L124 PetriNetUnfolderBase]: 306/626 cut-off events. [2024-11-17 03:37:00,036 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2024-11-17 03:37:00,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1127 conditions, 626 events. 306/626 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3138 event pairs, 202 based on Foata normal form. 105/604 useless extension candidates. Maximal degree in co-relation 947. Up to 441 conditions per place. [2024-11-17 03:37:00,051 INFO L140 encePairwiseOnDemand]: 66/78 looper letters, 29 selfloop transitions, 2 changer transitions 0/63 dead transitions. [2024-11-17 03:37:00,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 63 transitions, 206 flow [2024-11-17 03:37:00,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:37:00,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:37:00,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 149 transitions. [2024-11-17 03:37:00,062 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6367521367521367 [2024-11-17 03:37:00,063 INFO L175 Difference]: Start difference. First operand has 72 places, 74 transitions, 166 flow. Second operand 3 states and 149 transitions. [2024-11-17 03:37:00,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 63 transitions, 206 flow [2024-11-17 03:37:00,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 63 transitions, 194 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-17 03:37:00,071 INFO L231 Difference]: Finished difference. Result has 63 places, 63 transitions, 136 flow [2024-11-17 03:37:00,073 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=63, PETRI_TRANSITIONS=63} [2024-11-17 03:37:00,076 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, -9 predicate places. [2024-11-17 03:37:00,077 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 63 transitions, 136 flow [2024-11-17 03:37:00,077 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:37:00,077 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:37:00,078 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:37:00,078 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-17 03:37:00,078 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-17 03:37:00,079 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:37:00,079 INFO L85 PathProgramCache]: Analyzing trace with hash 24770159, now seen corresponding path program 1 times [2024-11-17 03:37:00,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:37:00,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195223262] [2024-11-17 03:37:00,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:37:00,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:37:00,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:37:00,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:37:00,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:37:00,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195223262] [2024-11-17 03:37:00,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195223262] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:37:00,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:37:00,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:37:00,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742353517] [2024-11-17 03:37:00,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:37:00,402 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:37:00,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:37:00,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:37:00,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:37:00,471 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 78 [2024-11-17 03:37:00,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 63 transitions, 136 flow. Second operand has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:37:00,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:37:00,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 78 [2024-11-17 03:37:00,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:37:00,682 INFO L124 PetriNetUnfolderBase]: 307/631 cut-off events. [2024-11-17 03:37:00,682 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-11-17 03:37:00,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1104 conditions, 631 events. 307/631 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3151 event pairs, 202 based on Foata normal form. 0/501 useless extension candidates. Maximal degree in co-relation 1059. Up to 454 conditions per place. [2024-11-17 03:37:00,691 INFO L140 encePairwiseOnDemand]: 73/78 looper letters, 33 selfloop transitions, 4 changer transitions 0/66 dead transitions. [2024-11-17 03:37:00,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 66 transitions, 216 flow [2024-11-17 03:37:00,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:37:00,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:37:00,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 182 transitions. [2024-11-17 03:37:00,696 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-11-17 03:37:00,697 INFO L175 Difference]: Start difference. First operand has 63 places, 63 transitions, 136 flow. Second operand 4 states and 182 transitions. [2024-11-17 03:37:00,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 66 transitions, 216 flow [2024-11-17 03:37:00,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 66 transitions, 212 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:37:00,699 INFO L231 Difference]: Finished difference. Result has 66 places, 66 transitions, 159 flow [2024-11-17 03:37:00,700 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=159, PETRI_PLACES=66, PETRI_TRANSITIONS=66} [2024-11-17 03:37:00,701 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, -6 predicate places. [2024-11-17 03:37:00,701 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 66 transitions, 159 flow [2024-11-17 03:37:00,701 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:37:00,702 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:37:00,702 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-11-17 03:37:00,703 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-17 03:37:00,703 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-17 03:37:00,704 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:37:00,704 INFO L85 PathProgramCache]: Analyzing trace with hash -805749948, now seen corresponding path program 1 times [2024-11-17 03:37:00,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:37:00,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370490913] [2024-11-17 03:37:00,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:37:00,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:37:00,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:37:00,978 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:37:00,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:37:00,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370490913] [2024-11-17 03:37:00,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370490913] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:37:00,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473034146] [2024-11-17 03:37:00,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:37:00,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:37:00,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:37:00,983 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:37:00,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-17 03:37:01,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:37:01,064 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-17 03:37:01,077 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:37:01,147 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-17 03:37:01,400 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:37:01,401 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:37:01,564 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:37:01,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473034146] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:37:01,565 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:37:01,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-17 03:37:01,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503860978] [2024-11-17 03:37:01,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:37:01,566 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-17 03:37:01,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:37:01,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-17 03:37:01,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-17 03:37:01,908 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 78 [2024-11-17 03:37:01,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 66 transitions, 159 flow. Second operand has 11 states, 11 states have (on average 34.36363636363637) internal successors, (378), 11 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:37:01,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:37:01,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 78 [2024-11-17 03:37:01,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:37:02,290 INFO L124 PetriNetUnfolderBase]: 307/630 cut-off events. [2024-11-17 03:37:02,291 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-17 03:37:02,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1116 conditions, 630 events. 307/630 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3128 event pairs, 202 based on Foata normal form. 0/499 useless extension candidates. Maximal degree in co-relation 1091. Up to 450 conditions per place. [2024-11-17 03:37:02,296 INFO L140 encePairwiseOnDemand]: 69/78 looper letters, 29 selfloop transitions, 11 changer transitions 0/66 dead transitions. [2024-11-17 03:37:02,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 66 transitions, 237 flow [2024-11-17 03:37:02,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-17 03:37:02,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-17 03:37:02,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 272 transitions. [2024-11-17 03:37:02,299 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4981684981684982 [2024-11-17 03:37:02,300 INFO L175 Difference]: Start difference. First operand has 66 places, 66 transitions, 159 flow. Second operand 7 states and 272 transitions. [2024-11-17 03:37:02,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 66 transitions, 237 flow [2024-11-17 03:37:02,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 66 transitions, 234 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 03:37:02,302 INFO L231 Difference]: Finished difference. Result has 70 places, 65 transitions, 174 flow [2024-11-17 03:37:02,302 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=174, PETRI_PLACES=70, PETRI_TRANSITIONS=65} [2024-11-17 03:37:02,303 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, -2 predicate places. [2024-11-17 03:37:02,303 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 65 transitions, 174 flow [2024-11-17 03:37:02,303 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 34.36363636363637) internal successors, (378), 11 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:37:02,303 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:37:02,304 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:37:02,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-17 03:37:02,504 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:37:02,505 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-17 03:37:02,506 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:37:02,506 INFO L85 PathProgramCache]: Analyzing trace with hash -807819736, now seen corresponding path program 1 times [2024-11-17 03:37:02,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:37:02,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804541068] [2024-11-17 03:37:02,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:37:02,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:37:02,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:37:02,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:37:02,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:37:02,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804541068] [2024-11-17 03:37:02,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804541068] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:37:02,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:37:02,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-17 03:37:02,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411840105] [2024-11-17 03:37:02,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:37:02,581 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:37:02,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:37:02,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:37:02,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:37:02,635 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 78 [2024-11-17 03:37:02,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 65 transitions, 174 flow. Second operand has 5 states, 5 states have (on average 36.8) internal successors, (184), 5 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:37:02,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:37:02,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 78 [2024-11-17 03:37:02,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:37:02,899 INFO L124 PetriNetUnfolderBase]: 611/1253 cut-off events. [2024-11-17 03:37:02,900 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2024-11-17 03:37:02,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2214 conditions, 1253 events. 611/1253 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 6937 event pairs, 404 based on Foata normal form. 2/1019 useless extension candidates. Maximal degree in co-relation 1112. Up to 453 conditions per place. [2024-11-17 03:37:02,909 INFO L140 encePairwiseOnDemand]: 66/78 looper letters, 59 selfloop transitions, 10 changer transitions 0/97 dead transitions. [2024-11-17 03:37:02,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 97 transitions, 394 flow [2024-11-17 03:37:02,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:37:02,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:37:02,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 251 transitions. [2024-11-17 03:37:02,912 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6435897435897436 [2024-11-17 03:37:02,912 INFO L175 Difference]: Start difference. First operand has 70 places, 65 transitions, 174 flow. Second operand 5 states and 251 transitions. [2024-11-17 03:37:02,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 97 transitions, 394 flow [2024-11-17 03:37:02,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 97 transitions, 351 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-11-17 03:37:02,918 INFO L231 Difference]: Finished difference. Result has 70 places, 72 transitions, 214 flow [2024-11-17 03:37:02,918 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=214, PETRI_PLACES=70, PETRI_TRANSITIONS=72} [2024-11-17 03:37:02,919 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, -2 predicate places. [2024-11-17 03:37:02,920 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 72 transitions, 214 flow [2024-11-17 03:37:02,920 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.8) internal successors, (184), 5 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:37:02,920 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:37:02,921 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:37:02,921 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-17 03:37:02,921 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-17 03:37:02,921 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:37:02,922 INFO L85 PathProgramCache]: Analyzing trace with hash 474264883, now seen corresponding path program 1 times [2024-11-17 03:37:02,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:37:02,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549604667] [2024-11-17 03:37:02,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:37:02,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:37:02,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:37:03,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:37:03,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:37:03,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549604667] [2024-11-17 03:37:03,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549604667] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:37:03,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284220637] [2024-11-17 03:37:03,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:37:03,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:37:03,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:37:03,174 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:37:03,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-17 03:37:03,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:37:03,248 INFO L255 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-17 03:37:03,250 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:37:03,261 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-17 03:37:03,403 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-17 03:37:03,403 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2024-11-17 03:37:03,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:37:03,439 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:37:03,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:37:03,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284220637] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-17 03:37:03,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-17 03:37:03,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6, 3] total 11 [2024-11-17 03:37:03,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272180689] [2024-11-17 03:37:03,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:37:03,536 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:37:03,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:37:03,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:37:03,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-17 03:37:03,616 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 78 [2024-11-17 03:37:03,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 72 transitions, 214 flow. Second operand has 5 states, 5 states have (on average 37.2) internal successors, (186), 5 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:37:03,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:37:03,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 78 [2024-11-17 03:37:03,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:37:03,997 INFO L124 PetriNetUnfolderBase]: 913/1862 cut-off events. [2024-11-17 03:37:03,997 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-11-17 03:37:04,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3286 conditions, 1862 events. 913/1862 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 11685 event pairs, 606 based on Foata normal form. 2/1519 useless extension candidates. Maximal degree in co-relation 1073. Up to 891 conditions per place. [2024-11-17 03:37:04,012 INFO L140 encePairwiseOnDemand]: 69/78 looper letters, 57 selfloop transitions, 8 changer transitions 0/97 dead transitions. [2024-11-17 03:37:04,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 97 transitions, 409 flow [2024-11-17 03:37:04,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:37:04,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:37:04,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 247 transitions. [2024-11-17 03:37:04,014 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-11-17 03:37:04,014 INFO L175 Difference]: Start difference. First operand has 70 places, 72 transitions, 214 flow. Second operand 5 states and 247 transitions. [2024-11-17 03:37:04,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 97 transitions, 409 flow [2024-11-17 03:37:04,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 97 transitions, 409 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-17 03:37:04,019 INFO L231 Difference]: Finished difference. Result has 75 places, 73 transitions, 244 flow [2024-11-17 03:37:04,019 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=244, PETRI_PLACES=75, PETRI_TRANSITIONS=73} [2024-11-17 03:37:04,021 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 3 predicate places. [2024-11-17 03:37:04,021 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 73 transitions, 244 flow [2024-11-17 03:37:04,022 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 37.2) internal successors, (186), 5 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:37:04,022 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:37:04,022 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:37:04,038 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-17 03:37:04,222 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:37:04,223 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-17 03:37:04,224 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:37:04,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1616470401, now seen corresponding path program 1 times [2024-11-17 03:37:04,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:37:04,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575421600] [2024-11-17 03:37:04,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:37:04,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:37:04,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:37:04,354 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:37:04,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:37:04,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575421600] [2024-11-17 03:37:04,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575421600] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:37:04,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674577015] [2024-11-17 03:37:04,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:37:04,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:37:04,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:37:04,359 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:37:04,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-17 03:37:04,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:37:04,431 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-17 03:37:04,432 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:37:04,514 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:37:04,514 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:37:04,590 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:37:04,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674577015] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:37:04,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:37:04,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-17 03:37:04,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500145501] [2024-11-17 03:37:04,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:37:04,592 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-17 03:37:04,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:37:04,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-17 03:37:04,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2024-11-17 03:37:04,755 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 78 [2024-11-17 03:37:04,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 73 transitions, 244 flow. Second operand has 14 states, 14 states have (on average 37.642857142857146) internal successors, (527), 14 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:37:04,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:37:04,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 78 [2024-11-17 03:37:04,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:37:05,314 INFO L124 PetriNetUnfolderBase]: 1220/2500 cut-off events. [2024-11-17 03:37:05,314 INFO L125 PetriNetUnfolderBase]: For 93/93 co-relation queries the response was YES. [2024-11-17 03:37:05,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4457 conditions, 2500 events. 1220/2500 cut-off events. For 93/93 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 15649 event pairs, 808 based on Foata normal form. 2/2012 useless extension candidates. Maximal degree in co-relation 1114. Up to 1321 conditions per place. [2024-11-17 03:37:05,332 INFO L140 encePairwiseOnDemand]: 65/78 looper letters, 56 selfloop transitions, 36 changer transitions 0/120 dead transitions. [2024-11-17 03:37:05,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 120 transitions, 608 flow [2024-11-17 03:37:05,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-17 03:37:05,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-17 03:37:05,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 489 transitions. [2024-11-17 03:37:05,335 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5699300699300699 [2024-11-17 03:37:05,335 INFO L175 Difference]: Start difference. First operand has 75 places, 73 transitions, 244 flow. Second operand 11 states and 489 transitions. [2024-11-17 03:37:05,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 120 transitions, 608 flow [2024-11-17 03:37:05,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 120 transitions, 606 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 03:37:05,340 INFO L231 Difference]: Finished difference. Result has 87 places, 93 transitions, 467 flow [2024-11-17 03:37:05,341 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=467, PETRI_PLACES=87, PETRI_TRANSITIONS=93} [2024-11-17 03:37:05,342 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 15 predicate places. [2024-11-17 03:37:05,343 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 93 transitions, 467 flow [2024-11-17 03:37:05,344 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 37.642857142857146) internal successors, (527), 14 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:37:05,344 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:37:05,344 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:37:05,364 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-17 03:37:05,548 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:37:05,549 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-17 03:37:05,549 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:37:05,549 INFO L85 PathProgramCache]: Analyzing trace with hash 2009523045, now seen corresponding path program 1 times [2024-11-17 03:37:05,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:37:05,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655196073] [2024-11-17 03:37:05,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:37:05,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:37:05,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:37:05,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:37:05,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:37:05,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655196073] [2024-11-17 03:37:05,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655196073] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:37:05,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:37:05,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-17 03:37:05,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191601083] [2024-11-17 03:37:05,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:37:05,639 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:37:05,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:37:05,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:37:05,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:37:05,684 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 78 [2024-11-17 03:37:05,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 93 transitions, 467 flow. Second operand has 5 states, 5 states have (on average 37.0) internal successors, (185), 5 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:37:05,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:37:05,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 78 [2024-11-17 03:37:05,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:37:06,086 INFO L124 PetriNetUnfolderBase]: 1322/2750 cut-off events. [2024-11-17 03:37:06,087 INFO L125 PetriNetUnfolderBase]: For 218/218 co-relation queries the response was YES. [2024-11-17 03:37:06,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4968 conditions, 2750 events. 1322/2750 cut-off events. For 218/218 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 17748 event pairs, 734 based on Foata normal form. 76/2352 useless extension candidates. Maximal degree in co-relation 2049. Up to 1161 conditions per place. [2024-11-17 03:37:06,108 INFO L140 encePairwiseOnDemand]: 65/78 looper letters, 83 selfloop transitions, 20 changer transitions 0/130 dead transitions. [2024-11-17 03:37:06,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 130 transitions, 779 flow [2024-11-17 03:37:06,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 03:37:06,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 03:37:06,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 293 transitions. [2024-11-17 03:37:06,110 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6260683760683761 [2024-11-17 03:37:06,110 INFO L175 Difference]: Start difference. First operand has 87 places, 93 transitions, 467 flow. Second operand 6 states and 293 transitions. [2024-11-17 03:37:06,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 130 transitions, 779 flow [2024-11-17 03:37:06,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 130 transitions, 704 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-11-17 03:37:06,115 INFO L231 Difference]: Finished difference. Result has 90 places, 95 transitions, 448 flow [2024-11-17 03:37:06,115 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=392, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=448, PETRI_PLACES=90, PETRI_TRANSITIONS=95} [2024-11-17 03:37:06,116 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 18 predicate places. [2024-11-17 03:37:06,116 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 95 transitions, 448 flow [2024-11-17 03:37:06,116 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 37.0) internal successors, (185), 5 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:37:06,116 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:37:06,117 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-11-17 03:37:06,117 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-17 03:37:06,117 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-17 03:37:06,121 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:37:06,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1932458314, now seen corresponding path program 2 times [2024-11-17 03:37:06,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:37:06,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102665970] [2024-11-17 03:37:06,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:37:06,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:37:06,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:37:06,404 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:37:06,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:37:06,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102665970] [2024-11-17 03:37:06,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102665970] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:37:06,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454217371] [2024-11-17 03:37:06,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 03:37:06,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:37:06,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:37:06,407 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:37:06,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-17 03:37:06,487 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-17 03:37:06,487 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:37:06,489 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-17 03:37:06,490 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:37:06,507 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-17 03:37:06,726 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-17 03:37:06,728 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 23 treesize of output 20 [2024-11-17 03:37:06,877 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:37:06,878 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:37:07,202 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:37:07,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454217371] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:37:07,202 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:37:07,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 22 [2024-11-17 03:37:07,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986202322] [2024-11-17 03:37:07,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:37:07,205 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-17 03:37:07,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:37:07,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-17 03:37:07,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2024-11-17 03:37:08,259 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 78 [2024-11-17 03:37:08,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 95 transitions, 448 flow. Second operand has 24 states, 24 states have (on average 34.375) internal successors, (825), 24 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:37:08,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:37:08,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 78 [2024-11-17 03:37:08,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:37:09,784 INFO L124 PetriNetUnfolderBase]: 1187/2642 cut-off events. [2024-11-17 03:37:09,784 INFO L125 PetriNetUnfolderBase]: For 729/765 co-relation queries the response was YES. [2024-11-17 03:37:09,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5152 conditions, 2642 events. 1187/2642 cut-off events. For 729/765 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 16610 event pairs, 808 based on Foata normal form. 14/2191 useless extension candidates. Maximal degree in co-relation 2431. Up to 1284 conditions per place. [2024-11-17 03:37:09,812 INFO L140 encePairwiseOnDemand]: 63/78 looper letters, 67 selfloop transitions, 53 changer transitions 0/146 dead transitions. [2024-11-17 03:37:09,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 146 transitions, 948 flow [2024-11-17 03:37:09,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-17 03:37:09,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-17 03:37:09,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 682 transitions. [2024-11-17 03:37:09,816 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5143288084464555 [2024-11-17 03:37:09,816 INFO L175 Difference]: Start difference. First operand has 90 places, 95 transitions, 448 flow. Second operand 17 states and 682 transitions. [2024-11-17 03:37:09,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 146 transitions, 948 flow [2024-11-17 03:37:09,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 146 transitions, 889 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-17 03:37:09,828 INFO L231 Difference]: Finished difference. Result has 105 places, 119 transitions, 725 flow [2024-11-17 03:37:09,828 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=396, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=725, PETRI_PLACES=105, PETRI_TRANSITIONS=119} [2024-11-17 03:37:09,829 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 33 predicate places. [2024-11-17 03:37:09,829 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 119 transitions, 725 flow [2024-11-17 03:37:09,829 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 34.375) internal successors, (825), 24 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:37:09,830 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:37:09,830 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:37:09,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-17 03:37:10,035 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:37:10,036 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-17 03:37:10,036 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:37:10,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1575147505, now seen corresponding path program 1 times [2024-11-17 03:37:10,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:37:10,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631120442] [2024-11-17 03:37:10,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:37:10,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:37:10,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:37:10,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:37:10,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:37:10,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631120442] [2024-11-17 03:37:10,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631120442] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:37:10,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:37:10,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-17 03:37:10,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307939601] [2024-11-17 03:37:10,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:37:10,123 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:37:10,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:37:10,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:37:10,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:37:10,169 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 78 [2024-11-17 03:37:10,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 119 transitions, 725 flow. Second operand has 5 states, 5 states have (on average 37.4) internal successors, (187), 5 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:37:10,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:37:10,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 78 [2024-11-17 03:37:10,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:37:10,602 INFO L124 PetriNetUnfolderBase]: 1437/2967 cut-off events. [2024-11-17 03:37:10,603 INFO L125 PetriNetUnfolderBase]: For 899/1043 co-relation queries the response was YES. [2024-11-17 03:37:10,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5942 conditions, 2967 events. 1437/2967 cut-off events. For 899/1043 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 18412 event pairs, 941 based on Foata normal form. 41/2541 useless extension candidates. Maximal degree in co-relation 4340. Up to 1783 conditions per place. [2024-11-17 03:37:10,623 INFO L140 encePairwiseOnDemand]: 65/78 looper letters, 101 selfloop transitions, 25 changer transitions 0/151 dead transitions. [2024-11-17 03:37:10,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 151 transitions, 1089 flow [2024-11-17 03:37:10,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 03:37:10,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 03:37:10,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 290 transitions. [2024-11-17 03:37:10,625 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6196581196581197 [2024-11-17 03:37:10,625 INFO L175 Difference]: Start difference. First operand has 105 places, 119 transitions, 725 flow. Second operand 6 states and 290 transitions. [2024-11-17 03:37:10,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 151 transitions, 1089 flow [2024-11-17 03:37:10,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 151 transitions, 1064 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-11-17 03:37:10,631 INFO L231 Difference]: Finished difference. Result has 110 places, 121 transitions, 766 flow [2024-11-17 03:37:10,632 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=700, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=766, PETRI_PLACES=110, PETRI_TRANSITIONS=121} [2024-11-17 03:37:10,633 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 38 predicate places. [2024-11-17 03:37:10,633 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 121 transitions, 766 flow [2024-11-17 03:37:10,634 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 37.4) internal successors, (187), 5 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:37:10,634 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:37:10,634 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:37:10,634 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-17 03:37:10,634 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread3Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-17 03:37:10,635 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:37:10,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1946967774, now seen corresponding path program 1 times [2024-11-17 03:37:10,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:37:10,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031399270] [2024-11-17 03:37:10,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:37:10,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:37:10,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:37:10,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:37:10,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:37:10,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031399270] [2024-11-17 03:37:10,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031399270] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:37:10,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:37:10,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-17 03:37:10,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765083359] [2024-11-17 03:37:10,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:37:10,721 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:37:10,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:37:10,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:37:10,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:37:10,775 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 78 [2024-11-17 03:37:10,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 121 transitions, 766 flow. Second operand has 5 states, 5 states have (on average 37.8) internal successors, (189), 5 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:37:10,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:37:10,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 78 [2024-11-17 03:37:10,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:37:11,132 INFO L124 PetriNetUnfolderBase]: 1202/2396 cut-off events. [2024-11-17 03:37:11,132 INFO L125 PetriNetUnfolderBase]: For 1300/1543 co-relation queries the response was YES. [2024-11-17 03:37:11,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5367 conditions, 2396 events. 1202/2396 cut-off events. For 1300/1543 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 13711 event pairs, 808 based on Foata normal form. 22/2138 useless extension candidates. Maximal degree in co-relation 3849. Up to 1591 conditions per place. [2024-11-17 03:37:11,151 INFO L140 encePairwiseOnDemand]: 65/78 looper letters, 94 selfloop transitions, 25 changer transitions 0/144 dead transitions. [2024-11-17 03:37:11,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 144 transitions, 1106 flow [2024-11-17 03:37:11,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 03:37:11,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 03:37:11,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 283 transitions. [2024-11-17 03:37:11,153 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6047008547008547 [2024-11-17 03:37:11,153 INFO L175 Difference]: Start difference. First operand has 110 places, 121 transitions, 766 flow. Second operand 6 states and 283 transitions. [2024-11-17 03:37:11,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 144 transitions, 1106 flow [2024-11-17 03:37:11,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 144 transitions, 1046 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-11-17 03:37:11,159 INFO L231 Difference]: Finished difference. Result has 114 places, 123 transitions, 780 flow [2024-11-17 03:37:11,160 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=714, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=780, PETRI_PLACES=114, PETRI_TRANSITIONS=123} [2024-11-17 03:37:11,160 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 42 predicate places. [2024-11-17 03:37:11,160 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 123 transitions, 780 flow [2024-11-17 03:37:11,161 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 37.8) internal successors, (189), 5 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:37:11,161 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:37:11,161 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:37:11,161 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-17 03:37:11,161 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-17 03:37:11,161 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:37:11,161 INFO L85 PathProgramCache]: Analyzing trace with hash 2006985941, now seen corresponding path program 1 times [2024-11-17 03:37:11,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:37:11,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704562323] [2024-11-17 03:37:11,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:37:11,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:37:11,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:37:11,520 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:37:11,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:37:11,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704562323] [2024-11-17 03:37:11,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704562323] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:37:11,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965174053] [2024-11-17 03:37:11,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:37:11,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:37:11,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:37:11,522 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:37:11,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-17 03:37:11,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:37:11,606 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-17 03:37:11,608 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:37:11,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-17 03:37:11,624 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-17 03:37:11,689 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-17 03:37:11,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-17 03:37:11,697 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-17 03:37:11,858 INFO L349 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2024-11-17 03:37:11,858 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2024-11-17 03:37:12,379 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:37:12,380 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:37:12,877 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:37:12,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965174053] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-17 03:37:12,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-17 03:37:12,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 15 [2024-11-17 03:37:12,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502651027] [2024-11-17 03:37:12,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:37:12,879 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-17 03:37:12,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:37:12,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-17 03:37:12,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2024-11-17 03:37:14,375 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-17 03:37:14,679 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 78 [2024-11-17 03:37:14,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 123 transitions, 780 flow. Second operand has 7 states, 7 states have (on average 39.857142857142854) internal successors, (279), 7 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:37:14,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:37:14,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 78 [2024-11-17 03:37:14,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:37:16,793 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-17 03:37:17,202 INFO L124 PetriNetUnfolderBase]: 1817/4466 cut-off events. [2024-11-17 03:37:17,202 INFO L125 PetriNetUnfolderBase]: For 2252/2456 co-relation queries the response was YES. [2024-11-17 03:37:17,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9325 conditions, 4466 events. 1817/4466 cut-off events. For 2252/2456 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 33807 event pairs, 1022 based on Foata normal form. 0/3811 useless extension candidates. Maximal degree in co-relation 6784. Up to 1963 conditions per place. [2024-11-17 03:37:17,247 INFO L140 encePairwiseOnDemand]: 69/78 looper letters, 97 selfloop transitions, 22 changer transitions 0/160 dead transitions. [2024-11-17 03:37:17,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 160 transitions, 1171 flow [2024-11-17 03:37:17,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-17 03:37:17,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-17 03:37:17,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 334 transitions. [2024-11-17 03:37:17,250 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6117216117216118 [2024-11-17 03:37:17,251 INFO L175 Difference]: Start difference. First operand has 114 places, 123 transitions, 780 flow. Second operand 7 states and 334 transitions. [2024-11-17 03:37:17,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 160 transitions, 1171 flow [2024-11-17 03:37:17,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 160 transitions, 1126 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-17 03:37:17,263 INFO L231 Difference]: Finished difference. Result has 119 places, 128 transitions, 840 flow [2024-11-17 03:37:17,264 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=736, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=840, PETRI_PLACES=119, PETRI_TRANSITIONS=128} [2024-11-17 03:37:17,265 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 47 predicate places. [2024-11-17 03:37:17,265 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 128 transitions, 840 flow [2024-11-17 03:37:17,265 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 39.857142857142854) internal successors, (279), 7 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:37:17,266 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:37:17,266 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:37:17,284 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-17 03:37:17,469 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,SelfDestructingSolverStorable10 [2024-11-17 03:37:17,470 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-17 03:37:17,470 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:37:17,470 INFO L85 PathProgramCache]: Analyzing trace with hash 2006985940, now seen corresponding path program 1 times [2024-11-17 03:37:17,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:37:17,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438258397] [2024-11-17 03:37:17,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:37:17,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:37:17,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:37:17,623 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:37:17,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:37:17,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438258397] [2024-11-17 03:37:17,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438258397] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:37:17,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:37:17,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-17 03:37:17,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826077896] [2024-11-17 03:37:17,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:37:17,627 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:37:17,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:37:17,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:37:17,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:37:17,683 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 78 [2024-11-17 03:37:17,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 128 transitions, 840 flow. Second operand has 5 states, 5 states have (on average 35.6) internal successors, (178), 5 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:37:17,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:37:17,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 78 [2024-11-17 03:37:17,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:37:18,130 INFO L124 PetriNetUnfolderBase]: 1769/3955 cut-off events. [2024-11-17 03:37:18,130 INFO L125 PetriNetUnfolderBase]: For 5001/5481 co-relation queries the response was YES. [2024-11-17 03:37:18,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9875 conditions, 3955 events. 1769/3955 cut-off events. For 5001/5481 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 27536 event pairs, 1223 based on Foata normal form. 228/3713 useless extension candidates. Maximal degree in co-relation 7198. Up to 2555 conditions per place. [2024-11-17 03:37:18,170 INFO L140 encePairwiseOnDemand]: 73/78 looper letters, 74 selfloop transitions, 13 changer transitions 0/126 dead transitions. [2024-11-17 03:37:18,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 126 transitions, 1010 flow [2024-11-17 03:37:18,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:37:18,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:37:18,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 199 transitions. [2024-11-17 03:37:18,172 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5102564102564102 [2024-11-17 03:37:18,172 INFO L175 Difference]: Start difference. First operand has 119 places, 128 transitions, 840 flow. Second operand 5 states and 199 transitions. [2024-11-17 03:37:18,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 126 transitions, 1010 flow [2024-11-17 03:37:18,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 126 transitions, 989 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-17 03:37:18,184 INFO L231 Difference]: Finished difference. Result has 119 places, 126 transitions, 841 flow [2024-11-17 03:37:18,185 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=815, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=841, PETRI_PLACES=119, PETRI_TRANSITIONS=126} [2024-11-17 03:37:18,186 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 47 predicate places. [2024-11-17 03:37:18,187 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 126 transitions, 841 flow [2024-11-17 03:37:18,187 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 35.6) internal successors, (178), 5 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:37:18,187 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:37:18,187 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:37:18,187 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-17 03:37:18,188 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-17 03:37:18,188 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:37:18,188 INFO L85 PathProgramCache]: Analyzing trace with hash 281662847, now seen corresponding path program 1 times [2024-11-17 03:37:18,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:37:18,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95501473] [2024-11-17 03:37:18,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:37:18,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:37:18,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:37:18,454 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:37:18,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:37:18,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95501473] [2024-11-17 03:37:18,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95501473] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:37:18,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453976362] [2024-11-17 03:37:18,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:37:18,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:37:18,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:37:18,457 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:37:18,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-17 03:37:18,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:37:18,546 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-17 03:37:18,547 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:37:18,555 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-17 03:37:18,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 03:37:18,621 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-17 03:37:18,630 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-17 03:37:18,631 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-17 03:37:18,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:37:18,703 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:37:18,854 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2024-11-17 03:37:18,930 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:37:18,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453976362] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:37:18,930 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:37:18,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 13 [2024-11-17 03:37:18,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524415825] [2024-11-17 03:37:18,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:37:18,931 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-17 03:37:18,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:37:18,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-17 03:37:18,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2024-11-17 03:37:22,947 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-17 03:37:26,956 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-17 03:37:30,999 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-17 03:37:35,039 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-17 03:37:39,041 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-17 03:37:43,044 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-17 03:37:47,121 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-17 03:37:51,182 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-17 03:37:55,214 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-17 03:37:59,257 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-17 03:38:03,290 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-17 03:38:07,328 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-17 03:38:07,404 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 78 [2024-11-17 03:38:07,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 126 transitions, 841 flow. Second operand has 14 states, 14 states have (on average 28.785714285714285) internal successors, (403), 14 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:38:07,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:38:07,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 78 [2024-11-17 03:38:07,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:38:08,593 INFO L124 PetriNetUnfolderBase]: 4967/8737 cut-off events. [2024-11-17 03:38:08,593 INFO L125 PetriNetUnfolderBase]: For 10701/12366 co-relation queries the response was YES. [2024-11-17 03:38:08,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22556 conditions, 8737 events. 4967/8737 cut-off events. For 10701/12366 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 59770 event pairs, 2136 based on Foata normal form. 0/7073 useless extension candidates. Maximal degree in co-relation 15653. Up to 4848 conditions per place. [2024-11-17 03:38:08,652 INFO L140 encePairwiseOnDemand]: 67/78 looper letters, 120 selfloop transitions, 29 changer transitions 0/168 dead transitions. [2024-11-17 03:38:08,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 168 transitions, 1323 flow [2024-11-17 03:38:08,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-17 03:38:08,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-17 03:38:08,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 296 transitions. [2024-11-17 03:38:08,654 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47435897435897434 [2024-11-17 03:38:08,654 INFO L175 Difference]: Start difference. First operand has 119 places, 126 transitions, 841 flow. Second operand 8 states and 296 transitions. [2024-11-17 03:38:08,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 168 transitions, 1323 flow [2024-11-17 03:38:08,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 168 transitions, 1305 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-17 03:38:08,786 INFO L231 Difference]: Finished difference. Result has 125 places, 130 transitions, 925 flow [2024-11-17 03:38:08,786 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=823, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=925, PETRI_PLACES=125, PETRI_TRANSITIONS=130} [2024-11-17 03:38:08,786 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 53 predicate places. [2024-11-17 03:38:08,786 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 130 transitions, 925 flow [2024-11-17 03:38:08,787 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 28.785714285714285) internal successors, (403), 14 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:38:08,787 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:38:08,787 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:38:08,809 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-17 03:38:08,987 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:38:08,987 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-17 03:38:08,988 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:38:08,988 INFO L85 PathProgramCache]: Analyzing trace with hash 281662846, now seen corresponding path program 1 times [2024-11-17 03:38:08,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:38:08,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205004687] [2024-11-17 03:38:08,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:08,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:38:09,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:09,085 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:38:09,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:38:09,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205004687] [2024-11-17 03:38:09,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205004687] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:38:09,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:38:09,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-17 03:38:09,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410229533] [2024-11-17 03:38:09,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:38:09,086 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:38:09,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:38:09,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:38:09,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:38:09,127 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 78 [2024-11-17 03:38:09,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 130 transitions, 925 flow. Second operand has 5 states, 5 states have (on average 37.0) internal successors, (185), 5 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:38:09,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:38:09,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 78 [2024-11-17 03:38:09,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:38:09,664 INFO L124 PetriNetUnfolderBase]: 2123/4758 cut-off events. [2024-11-17 03:38:09,664 INFO L125 PetriNetUnfolderBase]: For 9283/10132 co-relation queries the response was YES. [2024-11-17 03:38:09,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13060 conditions, 4758 events. 2123/4758 cut-off events. For 9283/10132 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 34662 event pairs, 1382 based on Foata normal form. 264/4470 useless extension candidates. Maximal degree in co-relation 9377. Up to 2984 conditions per place. [2024-11-17 03:38:09,702 INFO L140 encePairwiseOnDemand]: 73/78 looper letters, 75 selfloop transitions, 15 changer transitions 0/128 dead transitions. [2024-11-17 03:38:09,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 128 transitions, 1101 flow [2024-11-17 03:38:09,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:38:09,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:38:09,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 203 transitions. [2024-11-17 03:38:09,704 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5205128205128206 [2024-11-17 03:38:09,704 INFO L175 Difference]: Start difference. First operand has 125 places, 130 transitions, 925 flow. Second operand 5 states and 203 transitions. [2024-11-17 03:38:09,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 128 transitions, 1101 flow [2024-11-17 03:38:09,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 128 transitions, 1089 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:38:09,716 INFO L231 Difference]: Finished difference. Result has 125 places, 128 transitions, 939 flow [2024-11-17 03:38:09,717 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=909, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=939, PETRI_PLACES=125, PETRI_TRANSITIONS=128} [2024-11-17 03:38:09,717 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 53 predicate places. [2024-11-17 03:38:09,717 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 128 transitions, 939 flow [2024-11-17 03:38:09,718 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 37.0) internal successors, (185), 5 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:38:09,718 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:38:09,718 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:38:09,718 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-17 03:38:09,718 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-17 03:38:09,719 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:38:09,719 INFO L85 PathProgramCache]: Analyzing trace with hash -120736981, now seen corresponding path program 1 times [2024-11-17 03:38:09,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:38:09,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770445834] [2024-11-17 03:38:09,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:09,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:38:09,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:09,835 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:38:09,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:38:09,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770445834] [2024-11-17 03:38:09,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770445834] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:38:09,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960323023] [2024-11-17 03:38:09,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:09,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:38:09,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:38:09,838 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:38:09,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-17 03:38:09,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:09,933 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-17 03:38:09,934 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:38:10,018 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:38:10,019 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:38:10,089 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:38:10,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960323023] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:38:10,090 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:38:10,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-17 03:38:10,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268815435] [2024-11-17 03:38:10,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:38:10,091 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-17 03:38:10,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:38:10,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-17 03:38:10,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-17 03:38:10,205 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 78 [2024-11-17 03:38:10,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 128 transitions, 939 flow. Second operand has 14 states, 14 states have (on average 36.357142857142854) internal successors, (509), 14 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:38:10,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:38:10,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 78 [2024-11-17 03:38:10,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:38:11,104 INFO L124 PetriNetUnfolderBase]: 3593/6768 cut-off events. [2024-11-17 03:38:11,104 INFO L125 PetriNetUnfolderBase]: For 12422/13619 co-relation queries the response was YES. [2024-11-17 03:38:11,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19121 conditions, 6768 events. 3593/6768 cut-off events. For 12422/13619 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 46764 event pairs, 1467 based on Foata normal form. 50/6333 useless extension candidates. Maximal degree in co-relation 13260. Up to 2441 conditions per place. [2024-11-17 03:38:11,218 INFO L140 encePairwiseOnDemand]: 60/78 looper letters, 153 selfloop transitions, 60 changer transitions 0/233 dead transitions. [2024-11-17 03:38:11,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 233 transitions, 1851 flow [2024-11-17 03:38:11,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-17 03:38:11,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-17 03:38:11,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 554 transitions. [2024-11-17 03:38:11,222 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5918803418803419 [2024-11-17 03:38:11,222 INFO L175 Difference]: Start difference. First operand has 125 places, 128 transitions, 939 flow. Second operand 12 states and 554 transitions. [2024-11-17 03:38:11,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 233 transitions, 1851 flow [2024-11-17 03:38:11,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 233 transitions, 1829 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-17 03:38:11,240 INFO L231 Difference]: Finished difference. Result has 136 places, 134 transitions, 1096 flow [2024-11-17 03:38:11,240 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=917, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1096, PETRI_PLACES=136, PETRI_TRANSITIONS=134} [2024-11-17 03:38:11,241 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 64 predicate places. [2024-11-17 03:38:11,242 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 134 transitions, 1096 flow [2024-11-17 03:38:11,242 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 36.357142857142854) internal successors, (509), 14 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:38:11,242 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:38:11,242 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:38:11,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-17 03:38:11,446 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:38:11,447 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread3Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-17 03:38:11,447 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:38:11,447 INFO L85 PathProgramCache]: Analyzing trace with hash -364679089, now seen corresponding path program 1 times [2024-11-17 03:38:11,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:38:11,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056604637] [2024-11-17 03:38:11,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:11,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:38:11,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:11,763 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:38:11,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:38:11,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056604637] [2024-11-17 03:38:11,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056604637] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:38:11,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24516976] [2024-11-17 03:38:11,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:11,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:38:11,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:38:11,766 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:38:11,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-17 03:38:11,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:11,861 INFO L255 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-17 03:38:11,864 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:38:11,872 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-17 03:38:11,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-17 03:38:11,939 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-17 03:38:11,940 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-17 03:38:11,947 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-17 03:38:12,104 INFO L349 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2024-11-17 03:38:12,104 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2024-11-17 03:38:13,106 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:38:13,106 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:38:13,588 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:38:13,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24516976] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-17 03:38:13,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-17 03:38:13,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 15 [2024-11-17 03:38:13,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192888845] [2024-11-17 03:38:13,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:38:13,589 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-17 03:38:13,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:38:13,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-17 03:38:13,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2024-11-17 03:38:13,893 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 78 [2024-11-17 03:38:13,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 134 transitions, 1096 flow. Second operand has 7 states, 7 states have (on average 39.42857142857143) internal successors, (276), 7 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:38:13,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:38:13,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 78 [2024-11-17 03:38:13,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:38:15,624 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-17 03:38:16,964 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-17 03:38:18,414 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-17 03:38:19,829 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-17 03:38:21,640 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-17 03:38:22,166 INFO L124 PetriNetUnfolderBase]: 3114/6311 cut-off events. [2024-11-17 03:38:22,167 INFO L125 PetriNetUnfolderBase]: For 18665/20128 co-relation queries the response was YES. [2024-11-17 03:38:22,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19507 conditions, 6311 events. 3114/6311 cut-off events. For 18665/20128 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 45499 event pairs, 1127 based on Foata normal form. 67/5932 useless extension candidates. Maximal degree in co-relation 13616. Up to 2234 conditions per place. [2024-11-17 03:38:22,216 INFO L140 encePairwiseOnDemand]: 68/78 looper letters, 109 selfloop transitions, 23 changer transitions 0/170 dead transitions. [2024-11-17 03:38:22,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 170 transitions, 1582 flow [2024-11-17 03:38:22,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-17 03:38:22,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-17 03:38:22,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 324 transitions. [2024-11-17 03:38:22,218 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5934065934065934 [2024-11-17 03:38:22,218 INFO L175 Difference]: Start difference. First operand has 136 places, 134 transitions, 1096 flow. Second operand 7 states and 324 transitions. [2024-11-17 03:38:22,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 170 transitions, 1582 flow [2024-11-17 03:38:22,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 170 transitions, 1498 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-11-17 03:38:22,257 INFO L231 Difference]: Finished difference. Result has 139 places, 138 transitions, 1114 flow [2024-11-17 03:38:22,258 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=1022, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1114, PETRI_PLACES=139, PETRI_TRANSITIONS=138} [2024-11-17 03:38:22,258 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 67 predicate places. [2024-11-17 03:38:22,258 INFO L471 AbstractCegarLoop]: Abstraction has has 139 places, 138 transitions, 1114 flow [2024-11-17 03:38:22,259 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 39.42857142857143) internal successors, (276), 7 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:38:22,259 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:38:22,259 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:38:22,277 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-17 03:38:22,462 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-17 03:38:22,463 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-17 03:38:22,463 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:38:22,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1347390166, now seen corresponding path program 1 times [2024-11-17 03:38:22,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:38:22,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265169349] [2024-11-17 03:38:22,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:22,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:38:22,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:22,629 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:38:22,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:38:22,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265169349] [2024-11-17 03:38:22,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265169349] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:38:22,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701993546] [2024-11-17 03:38:22,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:22,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:38:22,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:38:22,633 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:38:22,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-17 03:38:22,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:22,729 INFO L255 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-17 03:38:22,730 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:38:22,815 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:38:22,815 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:38:22,898 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:38:22,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701993546] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:38:22,898 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:38:22,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-17 03:38:22,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004943615] [2024-11-17 03:38:22,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:38:22,900 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-17 03:38:22,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:38:22,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-17 03:38:22,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-17 03:38:23,015 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 78 [2024-11-17 03:38:23,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 138 transitions, 1114 flow. Second operand has 14 states, 14 states have (on average 36.5) internal successors, (511), 14 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:38:23,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:38:23,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 78 [2024-11-17 03:38:23,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:38:24,190 INFO L124 PetriNetUnfolderBase]: 4359/8074 cut-off events. [2024-11-17 03:38:24,190 INFO L125 PetriNetUnfolderBase]: For 21603/22642 co-relation queries the response was YES. [2024-11-17 03:38:24,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25621 conditions, 8074 events. 4359/8074 cut-off events. For 21603/22642 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 56478 event pairs, 1734 based on Foata normal form. 150/7845 useless extension candidates. Maximal degree in co-relation 18506. Up to 2981 conditions per place. [2024-11-17 03:38:24,249 INFO L140 encePairwiseOnDemand]: 60/78 looper letters, 157 selfloop transitions, 60 changer transitions 0/240 dead transitions. [2024-11-17 03:38:24,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 240 transitions, 2183 flow [2024-11-17 03:38:24,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-17 03:38:24,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-17 03:38:24,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 550 transitions. [2024-11-17 03:38:24,251 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5876068376068376 [2024-11-17 03:38:24,251 INFO L175 Difference]: Start difference. First operand has 139 places, 138 transitions, 1114 flow. Second operand 12 states and 550 transitions. [2024-11-17 03:38:24,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 240 transitions, 2183 flow [2024-11-17 03:38:24,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 240 transitions, 2155 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-17 03:38:24,278 INFO L231 Difference]: Finished difference. Result has 149 places, 144 transitions, 1265 flow [2024-11-17 03:38:24,278 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=1086, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1265, PETRI_PLACES=149, PETRI_TRANSITIONS=144} [2024-11-17 03:38:24,279 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 77 predicate places. [2024-11-17 03:38:24,279 INFO L471 AbstractCegarLoop]: Abstraction has has 149 places, 144 transitions, 1265 flow [2024-11-17 03:38:24,279 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 36.5) internal successors, (511), 14 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:38:24,279 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:38:24,279 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:38:24,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-17 03:38:24,483 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-17 03:38:24,484 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread3Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-17 03:38:24,484 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:38:24,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1579850892, now seen corresponding path program 1 times [2024-11-17 03:38:24,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:38:24,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534989909] [2024-11-17 03:38:24,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:24,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:38:24,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:24,955 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:38:24,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:38:24,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534989909] [2024-11-17 03:38:24,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534989909] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:38:24,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9289626] [2024-11-17 03:38:24,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:24,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:38:24,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:38:24,963 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:38:24,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-17 03:38:25,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:25,129 INFO L255 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-17 03:38:25,131 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:38:25,138 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-17 03:38:25,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 03:38:25,207 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-17 03:38:25,220 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-17 03:38:25,220 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