./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-more-mts.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-more-mts.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 cc67bee348fb2ffff05c0616660a93fb872177c05d08813d910a29641aea282e --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-17 03:39:23,963 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-17 03:39:24,018 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-17 03:39:24,022 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-17 03:39:24,023 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-17 03:39:24,047 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-17 03:39:24,047 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-17 03:39:24,048 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-17 03:39:24,048 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-17 03:39:24,051 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-17 03:39:24,051 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-17 03:39:24,051 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-17 03:39:24,052 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-17 03:39:24,052 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-17 03:39:24,052 INFO L153 SettingsManager]: * Use SBE=true [2024-11-17 03:39:24,052 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-17 03:39:24,054 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-17 03:39:24,054 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-17 03:39:24,054 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-17 03:39:24,054 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-17 03:39:24,054 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-17 03:39:24,055 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-17 03:39:24,055 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-17 03:39:24,055 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-17 03:39:24,055 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-17 03:39:24,056 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-17 03:39:24,056 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-17 03:39:24,056 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-17 03:39:24,056 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-17 03:39:24,056 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-17 03:39:24,057 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-17 03:39:24,057 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-17 03:39:24,057 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-17 03:39:24,057 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:39:24,057 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-17 03:39:24,057 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-17 03:39:24,058 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-17 03:39:24,058 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-17 03:39:24,058 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-17 03:39:24,059 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-17 03:39:24,059 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-17 03:39:24,059 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-17 03:39:24,059 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cc67bee348fb2ffff05c0616660a93fb872177c05d08813d910a29641aea282e [2024-11-17 03:39:24,238 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-17 03:39:24,260 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-17 03:39:24,263 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-17 03:39:24,264 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-17 03:39:24,264 INFO L274 PluginConnector]: CDTParser initialized [2024-11-17 03:39:24,265 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-mts.wvr.c [2024-11-17 03:39:25,493 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-17 03:39:25,688 INFO L384 CDTParser]: Found 1 translation units. [2024-11-17 03:39:25,688 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-mts.wvr.c [2024-11-17 03:39:25,695 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cc219330/ef337145139042939e272dccd3cbacba/FLAG1541b4acd [2024-11-17 03:39:26,074 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cc219330/ef337145139042939e272dccd3cbacba [2024-11-17 03:39:26,077 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-17 03:39:26,078 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-17 03:39:26,079 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-17 03:39:26,079 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-17 03:39:26,086 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-17 03:39:26,087 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:39:26" (1/1) ... [2024-11-17 03:39:26,088 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9ef5b20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:39:26, skipping insertion in model container [2024-11-17 03:39:26,088 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:39:26" (1/1) ... [2024-11-17 03:39:26,106 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-17 03:39:26,297 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 03:39:26,303 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:39:26,312 INFO L200 MainTranslator]: Completed pre-run [2024-11-17 03:39:26,330 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:39:26,344 INFO L204 MainTranslator]: Completed translation [2024-11-17 03:39:26,344 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:39:26 WrapperNode [2024-11-17 03:39:26,344 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-17 03:39:26,345 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-17 03:39:26,345 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-17 03:39:26,346 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-17 03:39:26,352 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:39:26" (1/1) ... [2024-11-17 03:39:26,358 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:39:26" (1/1) ... [2024-11-17 03:39:26,379 INFO L138 Inliner]: procedures = 24, calls = 32, calls flagged for inlining = 14, calls inlined = 20, statements flattened = 214 [2024-11-17 03:39:26,379 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-17 03:39:26,380 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-17 03:39:26,380 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-17 03:39:26,380 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-17 03:39:26,388 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:39:26" (1/1) ... [2024-11-17 03:39:26,388 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:39:26" (1/1) ... [2024-11-17 03:39:26,391 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:39:26" (1/1) ... [2024-11-17 03:39:26,407 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-17 03:39:26,407 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:39:26" (1/1) ... [2024-11-17 03:39:26,407 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:39:26" (1/1) ... [2024-11-17 03:39:26,416 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:39:26" (1/1) ... [2024-11-17 03:39:26,416 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:39:26" (1/1) ... [2024-11-17 03:39:26,418 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:39:26" (1/1) ... [2024-11-17 03:39:26,419 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:39:26" (1/1) ... [2024-11-17 03:39:26,421 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-17 03:39:26,422 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-17 03:39:26,422 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-17 03:39:26,422 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-17 03:39:26,423 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:39:26" (1/1) ... [2024-11-17 03:39:26,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:39:26,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:39:26,457 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 03:39:26,460 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 03:39:26,496 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-17 03:39:26,497 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-17 03:39:26,497 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-17 03:39:26,497 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-17 03:39:26,497 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-17 03:39:26,497 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-17 03:39:26,497 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-17 03:39:26,497 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-17 03:39:26,497 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-17 03:39:26,498 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-17 03:39:26,499 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-17 03:39:26,499 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-17 03:39:26,499 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-17 03:39:26,499 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-17 03:39:26,499 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-17 03:39:26,499 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-17 03:39:26,500 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-17 03:39:26,500 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-17 03:39:26,501 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 03:39:26,612 INFO L256 CfgBuilder]: Building ICFG [2024-11-17 03:39:26,614 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-17 03:39:26,945 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-17 03:39:26,946 INFO L307 CfgBuilder]: Performing block encoding [2024-11-17 03:39:27,186 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-17 03:39:27,186 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-17 03:39:27,187 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:39:27 BoogieIcfgContainer [2024-11-17 03:39:27,187 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-17 03:39:27,189 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-17 03:39:27,189 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-17 03:39:27,192 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-17 03:39:27,193 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:39:26" (1/3) ... [2024-11-17 03:39:27,194 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54c2767c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:39:27, skipping insertion in model container [2024-11-17 03:39:27,194 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:39:26" (2/3) ... [2024-11-17 03:39:27,195 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54c2767c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:39:27, skipping insertion in model container [2024-11-17 03:39:27,195 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:39:27" (3/3) ... [2024-11-17 03:39:27,196 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-mts.wvr.c [2024-11-17 03:39:27,210 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-17 03:39:27,210 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2024-11-17 03:39:27,210 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-17 03:39:27,270 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-17 03:39:27,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 70 places, 70 transitions, 161 flow [2024-11-17 03:39:27,328 INFO L124 PetriNetUnfolderBase]: 10/67 cut-off events. [2024-11-17 03:39:27,329 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-17 03:39:27,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 67 events. 10/67 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 191 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 53. Up to 2 conditions per place. [2024-11-17 03:39:27,332 INFO L82 GeneralOperation]: Start removeDead. Operand has 70 places, 70 transitions, 161 flow [2024-11-17 03:39:27,336 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 66 transitions, 150 flow [2024-11-17 03:39:27,345 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-17 03:39:27,351 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;@297b8085, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-17 03:39:27,352 INFO L334 AbstractCegarLoop]: Starting to check reachability of 35 error locations. [2024-11-17 03:39:27,354 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-17 03:39:27,354 INFO L124 PetriNetUnfolderBase]: 2/7 cut-off events. [2024-11-17 03:39:27,355 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-17 03:39:27,355 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:39:27,355 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:39:27,357 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-17 03:39:27,362 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:39:27,362 INFO L85 PathProgramCache]: Analyzing trace with hash 19987550, now seen corresponding path program 1 times [2024-11-17 03:39:27,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:39:27,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516661825] [2024-11-17 03:39:27,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:39:27,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:39:27,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:39:27,635 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 03:39:27,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:39:27,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516661825] [2024-11-17 03:39:27,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516661825] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:39:27,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:39:27,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-17 03:39:27,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047893186] [2024-11-17 03:39:27,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:39:27,645 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:39:27,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:39:27,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:39:27,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:39:27,690 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 70 [2024-11-17 03:39:27,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 66 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:39:27,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:39:27,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 70 [2024-11-17 03:39:27,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:39:27,994 INFO L124 PetriNetUnfolderBase]: 1076/1657 cut-off events. [2024-11-17 03:39:27,994 INFO L125 PetriNetUnfolderBase]: For 114/114 co-relation queries the response was YES. [2024-11-17 03:39:28,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3238 conditions, 1657 events. 1076/1657 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 8551 event pairs, 723 based on Foata normal form. 206/1602 useless extension candidates. Maximal degree in co-relation 2960. Up to 1475 conditions per place. [2024-11-17 03:39:28,028 INFO L140 encePairwiseOnDemand]: 58/70 looper letters, 30 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2024-11-17 03:39:28,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 55 transitions, 192 flow [2024-11-17 03:39:28,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:39:28,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:39:28,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 123 transitions. [2024-11-17 03:39:28,044 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5857142857142857 [2024-11-17 03:39:28,046 INFO L175 Difference]: Start difference. First operand has 66 places, 66 transitions, 150 flow. Second operand 3 states and 123 transitions. [2024-11-17 03:39:28,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 55 transitions, 192 flow [2024-11-17 03:39:28,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 55 transitions, 180 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-17 03:39:28,053 INFO L231 Difference]: Finished difference. Result has 55 places, 55 transitions, 120 flow [2024-11-17 03:39:28,056 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=55, PETRI_TRANSITIONS=55} [2024-11-17 03:39:28,060 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, -11 predicate places. [2024-11-17 03:39:28,060 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 55 transitions, 120 flow [2024-11-17 03:39:28,060 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:39:28,061 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:39:28,061 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:39:28,061 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-17 03:39:28,061 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-17 03:39:28,062 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:39:28,062 INFO L85 PathProgramCache]: Analyzing trace with hash 19987551, now seen corresponding path program 1 times [2024-11-17 03:39:28,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:39:28,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550649422] [2024-11-17 03:39:28,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:39:28,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:39:28,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:39:28,295 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 03:39:28,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:39:28,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550649422] [2024-11-17 03:39:28,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550649422] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:39:28,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:39:28,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:39:28,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747767812] [2024-11-17 03:39:28,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:39:28,298 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:39:28,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:39:28,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:39:28,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:39:28,325 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 70 [2024-11-17 03:39:28,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 55 transitions, 120 flow. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:39:28,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:39:28,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 70 [2024-11-17 03:39:28,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:39:28,557 INFO L124 PetriNetUnfolderBase]: 1076/1656 cut-off events. [2024-11-17 03:39:28,557 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-11-17 03:39:28,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3169 conditions, 1656 events. 1076/1656 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 8536 event pairs, 723 based on Foata normal form. 0/1395 useless extension candidates. Maximal degree in co-relation 3154. Up to 1475 conditions per place. [2024-11-17 03:39:28,567 INFO L140 encePairwiseOnDemand]: 65/70 looper letters, 28 selfloop transitions, 4 changer transitions 0/54 dead transitions. [2024-11-17 03:39:28,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 54 transitions, 182 flow [2024-11-17 03:39:28,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:39:28,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:39:28,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 141 transitions. [2024-11-17 03:39:28,569 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5035714285714286 [2024-11-17 03:39:28,569 INFO L175 Difference]: Start difference. First operand has 55 places, 55 transitions, 120 flow. Second operand 4 states and 141 transitions. [2024-11-17 03:39:28,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 54 transitions, 182 flow [2024-11-17 03:39:28,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 54 transitions, 178 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:39:28,570 INFO L231 Difference]: Finished difference. Result has 55 places, 54 transitions, 122 flow [2024-11-17 03:39:28,570 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=122, PETRI_PLACES=55, PETRI_TRANSITIONS=54} [2024-11-17 03:39:28,571 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, -11 predicate places. [2024-11-17 03:39:28,572 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 54 transitions, 122 flow [2024-11-17 03:39:28,572 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:39:28,572 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:39:28,573 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:39:28,573 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-17 03:39:28,574 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-17 03:39:28,575 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:39:28,575 INFO L85 PathProgramCache]: Analyzing trace with hash -582089550, now seen corresponding path program 1 times [2024-11-17 03:39:28,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:39:28,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788520845] [2024-11-17 03:39:28,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:39:28,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:39:28,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:39:28,657 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 03:39:28,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:39:28,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788520845] [2024-11-17 03:39:28,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788520845] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:39:28,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:39:28,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:39:28,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858720680] [2024-11-17 03:39:28,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:39:28,658 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:39:28,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:39:28,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:39:28,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:39:28,678 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 70 [2024-11-17 03:39:28,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 54 transitions, 122 flow. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 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 03:39:28,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:39:28,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 70 [2024-11-17 03:39:28,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:39:28,811 INFO L124 PetriNetUnfolderBase]: 919/1423 cut-off events. [2024-11-17 03:39:28,812 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-11-17 03:39:28,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2725 conditions, 1423 events. 919/1423 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 7062 event pairs, 608 based on Foata normal form. 0/1238 useless extension candidates. Maximal degree in co-relation 2708. Up to 1261 conditions per place. [2024-11-17 03:39:28,818 INFO L140 encePairwiseOnDemand]: 63/70 looper letters, 29 selfloop transitions, 2 changer transitions 0/49 dead transitions. [2024-11-17 03:39:28,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 49 transitions, 174 flow [2024-11-17 03:39:28,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:39:28,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:39:28,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 128 transitions. [2024-11-17 03:39:28,819 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-11-17 03:39:28,819 INFO L175 Difference]: Start difference. First operand has 55 places, 54 transitions, 122 flow. Second operand 4 states and 128 transitions. [2024-11-17 03:39:28,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 49 transitions, 174 flow [2024-11-17 03:39:28,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 49 transitions, 166 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-17 03:39:28,821 INFO L231 Difference]: Finished difference. Result has 50 places, 49 transitions, 108 flow [2024-11-17 03:39:28,821 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=108, PETRI_PLACES=50, PETRI_TRANSITIONS=49} [2024-11-17 03:39:28,821 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, -16 predicate places. [2024-11-17 03:39:28,822 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 49 transitions, 108 flow [2024-11-17 03:39:28,822 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 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 03:39:28,822 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:39:28,822 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:39:28,822 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-17 03:39:28,822 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-17 03:39:28,822 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:39:28,823 INFO L85 PathProgramCache]: Analyzing trace with hash -582089549, now seen corresponding path program 1 times [2024-11-17 03:39:28,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:39:28,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720152303] [2024-11-17 03:39:28,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:39:28,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:39:28,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:39:28,872 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 03:39:28,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:39:28,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720152303] [2024-11-17 03:39:28,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720152303] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:39:28,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:39:28,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-17 03:39:28,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765862978] [2024-11-17 03:39:28,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:39:28,873 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:39:28,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:39:28,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:39:28,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:39:28,885 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 70 [2024-11-17 03:39:28,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 49 transitions, 108 flow. Second operand has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:39:28,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:39:28,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 70 [2024-11-17 03:39:28,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:39:29,025 INFO L124 PetriNetUnfolderBase]: 919/1427 cut-off events. [2024-11-17 03:39:29,026 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2024-11-17 03:39:29,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2731 conditions, 1427 events. 919/1427 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 7085 event pairs, 608 based on Foata normal form. 1/1241 useless extension candidates. Maximal degree in co-relation 2708. Up to 1266 conditions per place. [2024-11-17 03:39:29,031 INFO L140 encePairwiseOnDemand]: 66/70 looper letters, 32 selfloop transitions, 2 changer transitions 1/52 dead transitions. [2024-11-17 03:39:29,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 52 transitions, 184 flow [2024-11-17 03:39:29,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:39:29,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:39:29,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 144 transitions. [2024-11-17 03:39:29,032 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5142857142857142 [2024-11-17 03:39:29,032 INFO L175 Difference]: Start difference. First operand has 50 places, 49 transitions, 108 flow. Second operand 4 states and 144 transitions. [2024-11-17 03:39:29,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 52 transitions, 184 flow [2024-11-17 03:39:29,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 52 transitions, 181 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:39:29,035 INFO L231 Difference]: Finished difference. Result has 53 places, 50 transitions, 119 flow [2024-11-17 03:39:29,035 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=119, PETRI_PLACES=53, PETRI_TRANSITIONS=50} [2024-11-17 03:39:29,036 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, -13 predicate places. [2024-11-17 03:39:29,036 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 50 transitions, 119 flow [2024-11-17 03:39:29,036 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:39:29,036 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:39:29,036 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:39:29,037 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-17 03:39:29,037 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-17 03:39:29,037 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:39:29,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1687791224, now seen corresponding path program 1 times [2024-11-17 03:39:29,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:39:29,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486892953] [2024-11-17 03:39:29,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:39:29,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:39:29,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:39:29,217 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 03:39:29,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:39:29,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486892953] [2024-11-17 03:39:29,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486892953] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:39:29,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003161870] [2024-11-17 03:39:29,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:39:29,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:39:29,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:39:29,221 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 03:39:29,222 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 03:39:29,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:39:29,292 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-17 03:39:29,295 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:39:29,410 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 03:39:29,410 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:39:29,479 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-17 03:39:29,500 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 03:39:29,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003161870] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:39:29,500 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:39:29,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 10 [2024-11-17 03:39:29,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142901042] [2024-11-17 03:39:29,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:39:29,501 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-17 03:39:29,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:39:29,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-17 03:39:29,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-11-17 03:39:29,669 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 70 [2024-11-17 03:39:29,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 50 transitions, 119 flow. Second operand has 12 states, 12 states have (on average 27.416666666666668) internal successors, (329), 12 states have internal predecessors, (329), 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 03:39:29,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:39:29,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 70 [2024-11-17 03:39:29,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:39:29,975 INFO L124 PetriNetUnfolderBase]: 1679/2738 cut-off events. [2024-11-17 03:39:29,976 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2024-11-17 03:39:29,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5079 conditions, 2738 events. 1679/2738 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 15923 event pairs, 483 based on Foata normal form. 0/2412 useless extension candidates. Maximal degree in co-relation 5064. Up to 1040 conditions per place. [2024-11-17 03:39:29,991 INFO L140 encePairwiseOnDemand]: 61/70 looper letters, 63 selfloop transitions, 8 changer transitions 0/87 dead transitions. [2024-11-17 03:39:29,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 87 transitions, 339 flow [2024-11-17 03:39:29,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-17 03:39:29,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-17 03:39:29,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 256 transitions. [2024-11-17 03:39:29,993 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5224489795918368 [2024-11-17 03:39:29,993 INFO L175 Difference]: Start difference. First operand has 53 places, 50 transitions, 119 flow. Second operand 7 states and 256 transitions. [2024-11-17 03:39:29,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 87 transitions, 339 flow [2024-11-17 03:39:29,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 87 transitions, 335 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-17 03:39:29,995 INFO L231 Difference]: Finished difference. Result has 57 places, 52 transitions, 150 flow [2024-11-17 03:39:29,995 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=150, PETRI_PLACES=57, PETRI_TRANSITIONS=52} [2024-11-17 03:39:29,996 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, -9 predicate places. [2024-11-17 03:39:29,996 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 150 flow [2024-11-17 03:39:29,996 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 27.416666666666668) internal successors, (329), 12 states have internal predecessors, (329), 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 03:39:29,996 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:39:29,996 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:39:30,012 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-17 03:39:30,200 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:39:30,200 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-17 03:39:30,201 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:39:30,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1370860060, now seen corresponding path program 1 times [2024-11-17 03:39:30,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:39:30,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621514963] [2024-11-17 03:39:30,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:39:30,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:39:30,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:39:30,284 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 03:39:30,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:39:30,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621514963] [2024-11-17 03:39:30,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621514963] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:39:30,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955812402] [2024-11-17 03:39:30,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:39:30,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:39:30,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:39:30,287 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 03:39:30,288 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 03:39:30,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:39:30,346 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-17 03:39:30,347 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:39:30,404 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 03:39:30,405 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:39:30,459 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 03:39:30,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955812402] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:39:30,460 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:39:30,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-17 03:39:30,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664581344] [2024-11-17 03:39:30,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:39:30,461 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-17 03:39:30,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:39:30,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-17 03:39:30,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-11-17 03:39:30,571 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 70 [2024-11-17 03:39:30,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 52 transitions, 150 flow. Second operand has 14 states, 14 states have (on average 26.857142857142858) internal successors, (376), 14 states have internal predecessors, (376), 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 03:39:30,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:39:30,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 70 [2024-11-17 03:39:30,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:39:31,078 INFO L124 PetriNetUnfolderBase]: 3115/5109 cut-off events. [2024-11-17 03:39:31,079 INFO L125 PetriNetUnfolderBase]: For 1858/1876 co-relation queries the response was YES. [2024-11-17 03:39:31,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11087 conditions, 5109 events. 3115/5109 cut-off events. For 1858/1876 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 32441 event pairs, 1537 based on Foata normal form. 0/4581 useless extension candidates. Maximal degree in co-relation 7262. Up to 2431 conditions per place. [2024-11-17 03:39:31,099 INFO L140 encePairwiseOnDemand]: 61/70 looper letters, 95 selfloop transitions, 11 changer transitions 0/120 dead transitions. [2024-11-17 03:39:31,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 120 transitions, 582 flow [2024-11-17 03:39:31,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-17 03:39:31,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-17 03:39:31,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 320 transitions. [2024-11-17 03:39:31,101 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5079365079365079 [2024-11-17 03:39:31,101 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 150 flow. Second operand 9 states and 320 transitions. [2024-11-17 03:39:31,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 120 transitions, 582 flow [2024-11-17 03:39:31,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 120 transitions, 576 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-17 03:39:31,106 INFO L231 Difference]: Finished difference. Result has 67 places, 59 transitions, 216 flow [2024-11-17 03:39:31,106 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=216, PETRI_PLACES=67, PETRI_TRANSITIONS=59} [2024-11-17 03:39:31,107 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 1 predicate places. [2024-11-17 03:39:31,107 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 59 transitions, 216 flow [2024-11-17 03:39:31,107 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 26.857142857142858) internal successors, (376), 14 states have internal predecessors, (376), 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 03:39:31,108 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:39:31,108 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:39:31,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-17 03:39:31,312 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-17 03:39:31,312 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread3Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-17 03:39:31,313 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:39:31,313 INFO L85 PathProgramCache]: Analyzing trace with hash 2136709890, now seen corresponding path program 1 times [2024-11-17 03:39:31,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:39:31,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005695460] [2024-11-17 03:39:31,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:39:31,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:39:31,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:39:31,479 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 03:39:31,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:39:31,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005695460] [2024-11-17 03:39:31,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005695460] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:39:31,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785729890] [2024-11-17 03:39:31,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:39:31,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:39:31,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:39:31,481 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 03:39:31,484 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 03:39:31,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:39:31,543 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-17 03:39:31,544 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:39:31,660 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 03:39:31,660 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-17 03:39:31,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785729890] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:39:31,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-17 03:39:31,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 10 [2024-11-17 03:39:31,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908435797] [2024-11-17 03:39:31,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:39:31,661 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-17 03:39:31,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:39:31,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-17 03:39:31,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-11-17 03:39:31,791 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 70 [2024-11-17 03:39:31,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 59 transitions, 216 flow. Second operand has 7 states, 7 states have (on average 28.714285714285715) internal successors, (201), 7 states have internal predecessors, (201), 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 03:39:31,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:39:31,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 70 [2024-11-17 03:39:31,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:39:32,252 INFO L124 PetriNetUnfolderBase]: 3191/5678 cut-off events. [2024-11-17 03:39:32,253 INFO L125 PetriNetUnfolderBase]: For 2847/2863 co-relation queries the response was YES. [2024-11-17 03:39:32,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12665 conditions, 5678 events. 3191/5678 cut-off events. For 2847/2863 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 39956 event pairs, 1540 based on Foata normal form. 0/5121 useless extension candidates. Maximal degree in co-relation 7999. Up to 3274 conditions per place. [2024-11-17 03:39:32,282 INFO L140 encePairwiseOnDemand]: 64/70 looper letters, 59 selfloop transitions, 6 changer transitions 0/82 dead transitions. [2024-11-17 03:39:32,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 82 transitions, 429 flow [2024-11-17 03:39:32,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:39:32,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:39:32,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 186 transitions. [2024-11-17 03:39:32,283 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5314285714285715 [2024-11-17 03:39:32,283 INFO L175 Difference]: Start difference. First operand has 67 places, 59 transitions, 216 flow. Second operand 5 states and 186 transitions. [2024-11-17 03:39:32,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 82 transitions, 429 flow [2024-11-17 03:39:32,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 82 transitions, 421 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-11-17 03:39:32,291 INFO L231 Difference]: Finished difference. Result has 71 places, 61 transitions, 233 flow [2024-11-17 03:39:32,291 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=233, PETRI_PLACES=71, PETRI_TRANSITIONS=61} [2024-11-17 03:39:32,292 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 5 predicate places. [2024-11-17 03:39:32,292 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 61 transitions, 233 flow [2024-11-17 03:39:32,292 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 28.714285714285715) internal successors, (201), 7 states have internal predecessors, (201), 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 03:39:32,292 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:39:32,292 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:39:32,306 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-17 03:39:32,493 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:39:32,495 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-17 03:39:32,495 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:39:32,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1697256039, now seen corresponding path program 2 times [2024-11-17 03:39:32,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:39:32,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115397322] [2024-11-17 03:39:32,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:39:32,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:39:32,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:39:32,692 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:39:32,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:39:32,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115397322] [2024-11-17 03:39:32,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115397322] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:39:32,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727894747] [2024-11-17 03:39:32,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 03:39:32,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:39:32,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:39:32,695 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 03:39:32,696 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 03:39:32,762 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-17 03:39:32,763 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:39:32,764 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-17 03:39:32,766 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:39:32,783 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 03:39:33,211 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-17 03:39:33,211 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-17 03:39:33,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727894747] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:39:33,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-17 03:39:33,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2024-11-17 03:39:33,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333620791] [2024-11-17 03:39:33,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:39:33,212 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-17 03:39:33,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:39:33,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-17 03:39:33,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-11-17 03:39:33,330 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 70 [2024-11-17 03:39:33,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 61 transitions, 233 flow. Second operand has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 6 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:39:33,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:39:33,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 70 [2024-11-17 03:39:33,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:39:34,204 INFO L124 PetriNetUnfolderBase]: 6198/9716 cut-off events. [2024-11-17 03:39:34,204 INFO L125 PetriNetUnfolderBase]: For 7078/7186 co-relation queries the response was YES. [2024-11-17 03:39:34,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24469 conditions, 9716 events. 6198/9716 cut-off events. For 7078/7186 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 62082 event pairs, 2186 based on Foata normal form. 0/8951 useless extension candidates. Maximal degree in co-relation 19380. Up to 5509 conditions per place. [2024-11-17 03:39:34,255 INFO L140 encePairwiseOnDemand]: 62/70 looper letters, 82 selfloop transitions, 9 changer transitions 0/107 dead transitions. [2024-11-17 03:39:34,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 107 transitions, 590 flow [2024-11-17 03:39:34,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 03:39:34,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 03:39:34,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 222 transitions. [2024-11-17 03:39:34,257 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5285714285714286 [2024-11-17 03:39:34,257 INFO L175 Difference]: Start difference. First operand has 71 places, 61 transitions, 233 flow. Second operand 6 states and 222 transitions. [2024-11-17 03:39:34,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 107 transitions, 590 flow [2024-11-17 03:39:34,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 107 transitions, 575 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-17 03:39:34,264 INFO L231 Difference]: Finished difference. Result has 75 places, 64 transitions, 270 flow [2024-11-17 03:39:34,264 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=270, PETRI_PLACES=75, PETRI_TRANSITIONS=64} [2024-11-17 03:39:34,264 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 9 predicate places. [2024-11-17 03:39:34,265 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 64 transitions, 270 flow [2024-11-17 03:39:34,265 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 6 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:39:34,265 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:39:34,265 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:39:34,279 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-17 03:39:34,465 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 03:39:34,465 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-17 03:39:34,466 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:39:34,466 INFO L85 PathProgramCache]: Analyzing trace with hash -2103041509, now seen corresponding path program 1 times [2024-11-17 03:39:34,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:39:34,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881335047] [2024-11-17 03:39:34,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:39:34,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:39:34,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:39:34,533 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 03:39:34,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:39:34,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881335047] [2024-11-17 03:39:34,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881335047] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:39:34,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928820873] [2024-11-17 03:39:34,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:39:34,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:39:34,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:39:34,536 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 03:39:34,537 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 03:39:34,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:39:34,595 INFO L255 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-17 03:39:34,596 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:39:34,653 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 03:39:34,654 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:39:34,701 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 03:39:34,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928820873] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:39:34,702 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:39:34,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-17 03:39:34,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106115862] [2024-11-17 03:39:34,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:39:34,702 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-17 03:39:34,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:39:34,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-17 03:39:34,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-17 03:39:34,782 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 70 [2024-11-17 03:39:34,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 64 transitions, 270 flow. Second operand has 14 states, 14 states have (on average 27.214285714285715) internal successors, (381), 14 states have internal predecessors, (381), 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 03:39:34,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:39:34,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 70 [2024-11-17 03:39:34,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:39:35,787 INFO L124 PetriNetUnfolderBase]: 6155/9819 cut-off events. [2024-11-17 03:39:35,787 INFO L125 PetriNetUnfolderBase]: For 8725/8977 co-relation queries the response was YES. [2024-11-17 03:39:35,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25271 conditions, 9819 events. 6155/9819 cut-off events. For 8725/8977 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 64221 event pairs, 2977 based on Foata normal form. 183/9288 useless extension candidates. Maximal degree in co-relation 20020. Up to 5690 conditions per place. [2024-11-17 03:39:35,852 INFO L140 encePairwiseOnDemand]: 60/70 looper letters, 123 selfloop transitions, 15 changer transitions 0/154 dead transitions. [2024-11-17 03:39:35,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 154 transitions, 881 flow [2024-11-17 03:39:35,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-17 03:39:35,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-17 03:39:35,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 395 transitions. [2024-11-17 03:39:35,854 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.512987012987013 [2024-11-17 03:39:35,854 INFO L175 Difference]: Start difference. First operand has 75 places, 64 transitions, 270 flow. Second operand 11 states and 395 transitions. [2024-11-17 03:39:35,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 154 transitions, 881 flow [2024-11-17 03:39:35,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 154 transitions, 859 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-11-17 03:39:35,863 INFO L231 Difference]: Finished difference. Result has 85 places, 70 transitions, 330 flow [2024-11-17 03:39:35,864 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=257, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=330, PETRI_PLACES=85, PETRI_TRANSITIONS=70} [2024-11-17 03:39:35,864 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 19 predicate places. [2024-11-17 03:39:35,864 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 70 transitions, 330 flow [2024-11-17 03:39:35,865 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 27.214285714285715) internal successors, (381), 14 states have internal predecessors, (381), 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 03:39:35,865 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:39:35,865 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:39:35,880 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 03:39:36,069 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:39:36,070 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-17 03:39:36,070 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:39:36,070 INFO L85 PathProgramCache]: Analyzing trace with hash 2048578032, now seen corresponding path program 2 times [2024-11-17 03:39:36,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:39:36,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984897618] [2024-11-17 03:39:36,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:39:36,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:39:36,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:39:36,348 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:39:36,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:39:36,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984897618] [2024-11-17 03:39:36,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984897618] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:39:36,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922715408] [2024-11-17 03:39:36,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 03:39:36,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:39:36,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:39:36,351 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 03:39:36,354 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 03:39:36,414 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-17 03:39:36,414 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:39:36,415 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-17 03:39:36,416 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:39:36,535 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:39:36,535 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:39:36,634 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-17 03:39:36,681 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:39:36,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922715408] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:39:36,682 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:39:36,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 19 [2024-11-17 03:39:36,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729762586] [2024-11-17 03:39:36,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:39:36,682 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-17 03:39:36,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:39:36,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-17 03:39:36,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2024-11-17 03:39:37,048 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 70 [2024-11-17 03:39:37,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 70 transitions, 330 flow. Second operand has 21 states, 21 states have (on average 27.761904761904763) internal successors, (583), 21 states have internal predecessors, (583), 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 03:39:37,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:39:37,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 70 [2024-11-17 03:39:37,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:39:38,143 INFO L124 PetriNetUnfolderBase]: 6088/10014 cut-off events. [2024-11-17 03:39:38,144 INFO L125 PetriNetUnfolderBase]: For 10335/10699 co-relation queries the response was YES. [2024-11-17 03:39:38,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26161 conditions, 10014 events. 6088/10014 cut-off events. For 10335/10699 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 67098 event pairs, 1479 based on Foata normal form. 314/10051 useless extension candidates. Maximal degree in co-relation 22065. Up to 2508 conditions per place. [2024-11-17 03:39:38,198 INFO L140 encePairwiseOnDemand]: 62/70 looper letters, 137 selfloop transitions, 14 changer transitions 0/172 dead transitions. [2024-11-17 03:39:38,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 172 transitions, 990 flow [2024-11-17 03:39:38,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-17 03:39:38,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-17 03:39:38,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 391 transitions. [2024-11-17 03:39:38,200 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5585714285714286 [2024-11-17 03:39:38,200 INFO L175 Difference]: Start difference. First operand has 85 places, 70 transitions, 330 flow. Second operand 10 states and 391 transitions. [2024-11-17 03:39:38,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 172 transitions, 990 flow [2024-11-17 03:39:38,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 172 transitions, 979 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-17 03:39:38,215 INFO L231 Difference]: Finished difference. Result has 93 places, 74 transitions, 389 flow [2024-11-17 03:39:38,215 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=319, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=389, PETRI_PLACES=93, PETRI_TRANSITIONS=74} [2024-11-17 03:39:38,216 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 27 predicate places. [2024-11-17 03:39:38,216 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 74 transitions, 389 flow [2024-11-17 03:39:38,216 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 27.761904761904763) internal successors, (583), 21 states have internal predecessors, (583), 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 03:39:38,216 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:39:38,216 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:39:38,232 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 03:39:38,417 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:39:38,417 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread3Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-17 03:39:38,417 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:39:38,417 INFO L85 PathProgramCache]: Analyzing trace with hash -474266338, now seen corresponding path program 1 times [2024-11-17 03:39:38,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:39:38,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114108795] [2024-11-17 03:39:38,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:39:38,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:39:38,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:39:38,527 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 03:39:38,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:39:38,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114108795] [2024-11-17 03:39:38,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114108795] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:39:38,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729060022] [2024-11-17 03:39:38,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:39:38,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:39:38,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:39:38,529 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 03:39:38,532 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 03:39:38,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:39:38,592 INFO L255 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-17 03:39:38,593 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:39:38,685 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 03:39:38,685 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:39:38,750 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 03:39:38,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729060022] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:39:38,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:39:38,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-17 03:39:38,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013166497] [2024-11-17 03:39:38,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:39:38,751 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-17 03:39:38,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:39:38,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-17 03:39:38,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2024-11-17 03:39:38,832 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 70 [2024-11-17 03:39:38,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 74 transitions, 389 flow. Second operand has 15 states, 15 states have (on average 27.333333333333332) internal successors, (410), 15 states have internal predecessors, (410), 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 03:39:38,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:39:38,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 70 [2024-11-17 03:39:38,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:39:40,128 INFO L124 PetriNetUnfolderBase]: 8184/12534 cut-off events. [2024-11-17 03:39:40,128 INFO L125 PetriNetUnfolderBase]: For 23600/24056 co-relation queries the response was YES. [2024-11-17 03:39:40,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36369 conditions, 12534 events. 8184/12534 cut-off events. For 23600/24056 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 77715 event pairs, 4093 based on Foata normal form. 261/12218 useless extension candidates. Maximal degree in co-relation 31945. Up to 8040 conditions per place. [2024-11-17 03:39:40,188 INFO L140 encePairwiseOnDemand]: 60/70 looper letters, 109 selfloop transitions, 15 changer transitions 0/142 dead transitions. [2024-11-17 03:39:40,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 142 transitions, 976 flow [2024-11-17 03:39:40,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-17 03:39:40,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-17 03:39:40,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 353 transitions. [2024-11-17 03:39:40,191 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5042857142857143 [2024-11-17 03:39:40,191 INFO L175 Difference]: Start difference. First operand has 93 places, 74 transitions, 389 flow. Second operand 10 states and 353 transitions. [2024-11-17 03:39:40,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 142 transitions, 976 flow [2024-11-17 03:39:40,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 142 transitions, 923 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-11-17 03:39:40,205 INFO L231 Difference]: Finished difference. Result has 99 places, 80 transitions, 430 flow [2024-11-17 03:39:40,205 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=361, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=430, PETRI_PLACES=99, PETRI_TRANSITIONS=80} [2024-11-17 03:39:40,207 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 33 predicate places. [2024-11-17 03:39:40,207 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 80 transitions, 430 flow [2024-11-17 03:39:40,207 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 27.333333333333332) internal successors, (410), 15 states have internal predecessors, (410), 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 03:39:40,207 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:39:40,207 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:39:40,225 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 03:39:40,408 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:39:40,408 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-17 03:39:40,409 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:39:40,409 INFO L85 PathProgramCache]: Analyzing trace with hash -740783893, now seen corresponding path program 1 times [2024-11-17 03:39:40,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:39:40,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361843729] [2024-11-17 03:39:40,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:39:40,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:39:40,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:39:40,596 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:39:40,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:39:40,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361843729] [2024-11-17 03:39:40,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361843729] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:39:40,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209222232] [2024-11-17 03:39:40,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:39:40,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:39:40,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:39:40,598 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 03:39:40,599 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 03:39:40,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:39:40,663 INFO L255 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-17 03:39:40,664 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:39:40,772 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:39:40,772 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:39:40,873 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:39:40,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209222232] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:39:40,873 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:39:40,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-11-17 03:39:40,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491985396] [2024-11-17 03:39:40,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:39:40,874 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-17 03:39:40,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:39:40,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-17 03:39:40,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2024-11-17 03:39:40,987 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 70 [2024-11-17 03:39:40,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 80 transitions, 430 flow. Second operand has 19 states, 19 states have (on average 27.263157894736842) internal successors, (518), 19 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:39:40,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:39:40,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 70 [2024-11-17 03:39:40,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:39:42,754 INFO L124 PetriNetUnfolderBase]: 13008/20465 cut-off events. [2024-11-17 03:39:42,755 INFO L125 PetriNetUnfolderBase]: For 33019/33239 co-relation queries the response was YES. [2024-11-17 03:39:42,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62176 conditions, 20465 events. 13008/20465 cut-off events. For 33019/33239 co-relation queries the response was YES. Maximal size of possible extension queue 665. Compared 143394 event pairs, 4792 based on Foata normal form. 183/20388 useless extension candidates. Maximal degree in co-relation 34483. Up to 7916 conditions per place. [2024-11-17 03:39:42,911 INFO L140 encePairwiseOnDemand]: 60/70 looper letters, 195 selfloop transitions, 21 changer transitions 0/234 dead transitions. [2024-11-17 03:39:42,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 234 transitions, 1738 flow [2024-11-17 03:39:42,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-17 03:39:42,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-17 03:39:42,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 461 transitions. [2024-11-17 03:39:42,913 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5065934065934066 [2024-11-17 03:39:42,913 INFO L175 Difference]: Start difference. First operand has 99 places, 80 transitions, 430 flow. Second operand 13 states and 461 transitions. [2024-11-17 03:39:42,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 234 transitions, 1738 flow [2024-11-17 03:39:43,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 234 transitions, 1727 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-17 03:39:43,060 INFO L231 Difference]: Finished difference. Result has 113 places, 90 transitions, 565 flow [2024-11-17 03:39:43,061 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=421, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=565, PETRI_PLACES=113, PETRI_TRANSITIONS=90} [2024-11-17 03:39:43,062 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 47 predicate places. [2024-11-17 03:39:43,062 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 90 transitions, 565 flow [2024-11-17 03:39:43,063 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 27.263157894736842) internal successors, (518), 19 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:39:43,063 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:39:43,063 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:39:43,077 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 03:39:43,263 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-17 03:39:43,264 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread3Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-17 03:39:43,264 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:39:43,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1749743319, now seen corresponding path program 2 times [2024-11-17 03:39:43,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:39:43,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429946916] [2024-11-17 03:39:43,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:39:43,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:39:43,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:39:43,471 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-17 03:39:43,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:39:43,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429946916] [2024-11-17 03:39:43,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429946916] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:39:43,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312626925] [2024-11-17 03:39:43,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 03:39:43,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:39:43,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:39:43,473 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 03:39:43,474 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 03:39:43,536 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-17 03:39:43,537 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:39:43,538 INFO L255 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-17 03:39:43,539 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:39:43,702 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-17 03:39:43,702 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:39:43,917 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 35 treesize of output 31 [2024-11-17 03:39:43,967 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-17 03:39:43,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312626925] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:39:43,968 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:39:43,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2024-11-17 03:39:43,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265560835] [2024-11-17 03:39:43,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:39:43,969 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-17 03:39:43,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:39:43,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-17 03:39:43,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2024-11-17 03:39:44,618 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 70 [2024-11-17 03:39:44,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 90 transitions, 565 flow. Second operand has 23 states, 23 states have (on average 27.217391304347824) internal successors, (626), 23 states have internal predecessors, (626), 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 03:39:44,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:39:44,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 70 [2024-11-17 03:39:44,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:39:46,587 INFO L124 PetriNetUnfolderBase]: 12356/18415 cut-off events. [2024-11-17 03:39:46,587 INFO L125 PetriNetUnfolderBase]: For 46057/47041 co-relation queries the response was YES. [2024-11-17 03:39:46,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59051 conditions, 18415 events. 12356/18415 cut-off events. For 46057/47041 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 116817 event pairs, 1895 based on Foata normal form. 528/18833 useless extension candidates. Maximal degree in co-relation 45642. Up to 4458 conditions per place. [2024-11-17 03:39:46,718 INFO L140 encePairwiseOnDemand]: 62/70 looper letters, 158 selfloop transitions, 16 changer transitions 0/194 dead transitions. [2024-11-17 03:39:46,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 194 transitions, 1624 flow [2024-11-17 03:39:46,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-17 03:39:46,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-17 03:39:46,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 259 transitions. [2024-11-17 03:39:46,719 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5285714285714286 [2024-11-17 03:39:46,719 INFO L175 Difference]: Start difference. First operand has 113 places, 90 transitions, 565 flow. Second operand 7 states and 259 transitions. [2024-11-17 03:39:46,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 194 transitions, 1624 flow [2024-11-17 03:39:46,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 194 transitions, 1573 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-11-17 03:39:46,752 INFO L231 Difference]: Finished difference. Result has 116 places, 91 transitions, 593 flow [2024-11-17 03:39:46,752 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=537, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=593, PETRI_PLACES=116, PETRI_TRANSITIONS=91} [2024-11-17 03:39:46,753 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 50 predicate places. [2024-11-17 03:39:46,753 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 91 transitions, 593 flow [2024-11-17 03:39:46,754 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 27.217391304347824) internal successors, (626), 23 states have internal predecessors, (626), 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 03:39:46,754 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:39:46,754 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:39:46,766 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-17 03:39:46,954 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-17 03:39:46,954 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-17 03:39:46,955 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:39:46,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1886484022, now seen corresponding path program 2 times [2024-11-17 03:39:46,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:39:46,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9457563] [2024-11-17 03:39:46,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:39:46,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:39:46,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:39:47,212 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-17 03:39:47,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:39:47,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9457563] [2024-11-17 03:39:47,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9457563] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:39:47,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240082125] [2024-11-17 03:39:47,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 03:39:47,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:39:47,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:39:47,217 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 03:39:47,218 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 03:39:47,284 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-17 03:39:47,284 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:39:47,285 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-17 03:39:47,286 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:39:47,447 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:39:47,447 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:39:47,551 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-17 03:39:47,691 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:39:47,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240082125] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:39:47,691 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:39:47,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2024-11-17 03:39:47,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396046872] [2024-11-17 03:39:47,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:39:47,692 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-17 03:39:47,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:39:47,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-17 03:39:47,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2024-11-17 03:39:48,341 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 70 [2024-11-17 03:39:48,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 91 transitions, 593 flow. Second operand has 23 states, 23 states have (on average 25.347826086956523) internal successors, (583), 23 states have internal predecessors, (583), 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 03:39:48,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:39:48,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 70 [2024-11-17 03:39:48,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:39:51,385 INFO L124 PetriNetUnfolderBase]: 14538/22130 cut-off events. [2024-11-17 03:39:51,385 INFO L125 PetriNetUnfolderBase]: For 60953/61583 co-relation queries the response was YES. [2024-11-17 03:39:51,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76492 conditions, 22130 events. 14538/22130 cut-off events. For 60953/61583 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 146001 event pairs, 1929 based on Foata normal form. 640/22657 useless extension candidates. Maximal degree in co-relation 50252. Up to 3355 conditions per place. [2024-11-17 03:39:51,522 INFO L140 encePairwiseOnDemand]: 58/70 looper letters, 269 selfloop transitions, 25 changer transitions 0/312 dead transitions. [2024-11-17 03:39:51,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 312 transitions, 2467 flow [2024-11-17 03:39:51,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-17 03:39:51,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-17 03:39:51,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 619 transitions. [2024-11-17 03:39:51,524 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5201680672268908 [2024-11-17 03:39:51,524 INFO L175 Difference]: Start difference. First operand has 116 places, 91 transitions, 593 flow. Second operand 17 states and 619 transitions. [2024-11-17 03:39:51,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 312 transitions, 2467 flow [2024-11-17 03:39:51,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 312 transitions, 2404 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-11-17 03:39:51,578 INFO L231 Difference]: Finished difference. Result has 129 places, 96 transitions, 674 flow [2024-11-17 03:39:51,578 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=567, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=674, PETRI_PLACES=129, PETRI_TRANSITIONS=96} [2024-11-17 03:39:51,579 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 63 predicate places. [2024-11-17 03:39:51,579 INFO L471 AbstractCegarLoop]: Abstraction has has 129 places, 96 transitions, 674 flow [2024-11-17 03:39:51,579 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 25.347826086956523) internal successors, (583), 23 states have internal predecessors, (583), 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 03:39:51,579 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:39:51,579 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-17 03:39:51,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-17 03:39:51,779 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-17 03:39:51,780 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-17 03:39:51,780 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:39:51,780 INFO L85 PathProgramCache]: Analyzing trace with hash 729066163, now seen corresponding path program 3 times [2024-11-17 03:39:51,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:39:51,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142776292] [2024-11-17 03:39:51,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:39:51,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:39:51,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:39:51,854 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:39:51,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:39:51,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142776292] [2024-11-17 03:39:51,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142776292] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:39:51,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588746905] [2024-11-17 03:39:51,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-17 03:39:51,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:39:51,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:39:51,857 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:39:51,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-17 03:39:51,916 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-17 03:39:51,916 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:39:51,917 INFO L255 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-17 03:39:51,918 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:39:52,020 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-17 03:39:52,021 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:39:52,205 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 13 treesize of output 11 [2024-11-17 03:39:52,229 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-17 03:39:52,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588746905] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:39:52,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:39:52,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 21 [2024-11-17 03:39:52,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347969266] [2024-11-17 03:39:52,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:39:52,230 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-17 03:39:52,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:39:52,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-17 03:39:52,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2024-11-17 03:39:52,593 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 70 [2024-11-17 03:39:52,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 96 transitions, 674 flow. Second operand has 22 states, 22 states have (on average 25.272727272727273) internal successors, (556), 22 states have internal predecessors, (556), 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 03:39:52,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:39:52,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 70 [2024-11-17 03:39:52,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:39:55,194 INFO L124 PetriNetUnfolderBase]: 13491/20407 cut-off events. [2024-11-17 03:39:55,194 INFO L125 PetriNetUnfolderBase]: For 60847/61358 co-relation queries the response was YES. [2024-11-17 03:39:55,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70714 conditions, 20407 events. 13491/20407 cut-off events. For 60847/61358 co-relation queries the response was YES. Maximal size of possible extension queue 583. Compared 133417 event pairs, 1792 based on Foata normal form. 242/20454 useless extension candidates. Maximal degree in co-relation 50344. Up to 4056 conditions per place. [2024-11-17 03:39:55,347 INFO L140 encePairwiseOnDemand]: 59/70 looper letters, 332 selfloop transitions, 37 changer transitions 0/389 dead transitions. [2024-11-17 03:39:55,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 389 transitions, 3252 flow [2024-11-17 03:39:55,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-17 03:39:55,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-17 03:39:55,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 736 transitions. [2024-11-17 03:39:55,350 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5006802721088436 [2024-11-17 03:39:55,350 INFO L175 Difference]: Start difference. First operand has 129 places, 96 transitions, 674 flow. Second operand 21 states and 736 transitions. [2024-11-17 03:39:55,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 389 transitions, 3252 flow [2024-11-17 03:39:55,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 389 transitions, 2970 flow, removed 40 selfloop flow, removed 14 redundant places. [2024-11-17 03:39:55,410 INFO L231 Difference]: Finished difference. Result has 138 places, 108 transitions, 789 flow [2024-11-17 03:39:55,410 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=599, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=789, PETRI_PLACES=138, PETRI_TRANSITIONS=108} [2024-11-17 03:39:55,411 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 72 predicate places. [2024-11-17 03:39:55,411 INFO L471 AbstractCegarLoop]: Abstraction has has 138 places, 108 transitions, 789 flow [2024-11-17 03:39:55,411 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 25.272727272727273) internal successors, (556), 22 states have internal predecessors, (556), 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 03:39:55,411 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:39:55,412 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:39:55,424 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-17 03:39:55,612 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-17 03:39:55,612 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-17 03:39:55,613 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:39:55,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1962485512, now seen corresponding path program 1 times [2024-11-17 03:39:55,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:39:55,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741591124] [2024-11-17 03:39:55,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:39:55,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:39:55,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:39:55,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:39:55,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:39:55,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741591124] [2024-11-17 03:39:55,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741591124] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:39:55,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:39:55,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:39:55,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491276636] [2024-11-17 03:39:55,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:39:55,681 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:39:55,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:39:55,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:39:55,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:39:55,682 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 70 [2024-11-17 03:39:55,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 108 transitions, 789 flow. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:39:55,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:39:55,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 70 [2024-11-17 03:39:55,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:39:57,239 INFO L124 PetriNetUnfolderBase]: 9806/16682 cut-off events. [2024-11-17 03:39:57,239 INFO L125 PetriNetUnfolderBase]: For 51684/51704 co-relation queries the response was YES. [2024-11-17 03:39:57,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58292 conditions, 16682 events. 9806/16682 cut-off events. For 51684/51704 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 123195 event pairs, 2022 based on Foata normal form. 3/16343 useless extension candidates. Maximal degree in co-relation 42741. Up to 11229 conditions per place. [2024-11-17 03:39:57,366 INFO L140 encePairwiseOnDemand]: 65/70 looper letters, 108 selfloop transitions, 8 changer transitions 1/150 dead transitions. [2024-11-17 03:39:57,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 150 transitions, 1314 flow [2024-11-17 03:39:57,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:39:57,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:39:57,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 138 transitions. [2024-11-17 03:39:57,368 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6571428571428571 [2024-11-17 03:39:57,368 INFO L175 Difference]: Start difference. First operand has 138 places, 108 transitions, 789 flow. Second operand 3 states and 138 transitions. [2024-11-17 03:39:57,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 150 transitions, 1314 flow [2024-11-17 03:39:57,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 150 transitions, 1259 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-11-17 03:39:57,430 INFO L231 Difference]: Finished difference. Result has 133 places, 115 transitions, 845 flow [2024-11-17 03:39:57,431 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=751, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=845, PETRI_PLACES=133, PETRI_TRANSITIONS=115} [2024-11-17 03:39:57,431 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 67 predicate places. [2024-11-17 03:39:57,431 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 115 transitions, 845 flow [2024-11-17 03:39:57,431 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:39:57,431 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:39:57,432 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:39:57,432 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-17 03:39:57,432 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-17 03:39:57,432 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:39:57,432 INFO L85 PathProgramCache]: Analyzing trace with hash -253481770, now seen corresponding path program 1 times [2024-11-17 03:39:57,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:39:57,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354632284] [2024-11-17 03:39:57,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:39:57,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:39:57,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:39:57,523 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:39:57,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:39:57,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354632284] [2024-11-17 03:39:57,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354632284] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:39:57,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108462863] [2024-11-17 03:39:57,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:39:57,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:39:57,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:39:57,525 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:39:57,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-17 03:39:57,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:39:57,600 INFO L255 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-17 03:39:57,601 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:39:57,630 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:39:57,630 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:39:57,660 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:39:57,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108462863] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-17 03:39:57,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-17 03:39:57,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2024-11-17 03:39:57,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951663306] [2024-11-17 03:39:57,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:39:57,661 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:39:57,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:39:57,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:39:57,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-11-17 03:39:57,675 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 70 [2024-11-17 03:39:57,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 115 transitions, 845 flow. Second operand has 5 states, 5 states have (on average 29.8) internal successors, (149), 5 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:39:57,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:39:57,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 70 [2024-11-17 03:39:57,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:39:59,500 INFO L124 PetriNetUnfolderBase]: 12766/19995 cut-off events. [2024-11-17 03:39:59,501 INFO L125 PetriNetUnfolderBase]: For 63785/64066 co-relation queries the response was YES. [2024-11-17 03:39:59,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70840 conditions, 19995 events. 12766/19995 cut-off events. For 63785/64066 co-relation queries the response was YES. Maximal size of possible extension queue 594. Compared 139685 event pairs, 3157 based on Foata normal form. 324/20031 useless extension candidates. Maximal degree in co-relation 51054. Up to 10174 conditions per place. [2024-11-17 03:39:59,665 INFO L140 encePairwiseOnDemand]: 64/70 looper letters, 110 selfloop transitions, 16 changer transitions 0/146 dead transitions. [2024-11-17 03:39:59,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 146 transitions, 1296 flow [2024-11-17 03:39:59,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:39:59,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:39:59,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 176 transitions. [2024-11-17 03:39:59,666 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5028571428571429 [2024-11-17 03:39:59,666 INFO L175 Difference]: Start difference. First operand has 133 places, 115 transitions, 845 flow. Second operand 5 states and 176 transitions. [2024-11-17 03:39:59,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 146 transitions, 1296 flow [2024-11-17 03:39:59,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 146 transitions, 1279 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-17 03:39:59,726 INFO L231 Difference]: Finished difference. Result has 133 places, 110 transitions, 822 flow [2024-11-17 03:39:59,727 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=782, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=822, PETRI_PLACES=133, PETRI_TRANSITIONS=110} [2024-11-17 03:39:59,727 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 67 predicate places. [2024-11-17 03:39:59,731 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 110 transitions, 822 flow [2024-11-17 03:39:59,731 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.8) internal successors, (149), 5 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:39:59,731 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:39:59,731 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:39:59,743 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-17 03:39:59,932 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-17 03:39:59,932 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-17 03:39:59,932 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:39:59,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1059713167, now seen corresponding path program 1 times [2024-11-17 03:39:59,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:39:59,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533394229] [2024-11-17 03:39:59,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:39:59,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:39:59,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:40:00,160 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:40:00,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:40:00,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533394229] [2024-11-17 03:40:00,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533394229] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:40:00,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:40:00,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-17 03:40:00,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625760168] [2024-11-17 03:40:00,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:40:00,161 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:40:00,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:40:00,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:40:00,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:40:00,162 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 70 [2024-11-17 03:40:00,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 110 transitions, 822 flow. Second operand has 5 states, 5 states have (on average 32.6) internal successors, (163), 5 states have internal predecessors, (163), 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 03:40:00,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:40:00,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 70 [2024-11-17 03:40:00,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:40:02,319 INFO L124 PetriNetUnfolderBase]: 12208/20539 cut-off events. [2024-11-17 03:40:02,319 INFO L125 PetriNetUnfolderBase]: For 76682/76968 co-relation queries the response was YES. [2024-11-17 03:40:02,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74195 conditions, 20539 events. 12208/20539 cut-off events. For 76682/76968 co-relation queries the response was YES. Maximal size of possible extension queue 717. Compared 156726 event pairs, 2175 based on Foata normal form. 49/20246 useless extension candidates. Maximal degree in co-relation 66835. Up to 9902 conditions per place. [2024-11-17 03:40:02,472 INFO L140 encePairwiseOnDemand]: 64/70 looper letters, 170 selfloop transitions, 40 changer transitions 2/242 dead transitions. [2024-11-17 03:40:02,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 242 transitions, 2176 flow [2024-11-17 03:40:02,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 03:40:02,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 03:40:02,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 273 transitions. [2024-11-17 03:40:02,474 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-11-17 03:40:02,474 INFO L175 Difference]: Start difference. First operand has 133 places, 110 transitions, 822 flow. Second operand 6 states and 273 transitions. [2024-11-17 03:40:02,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 242 transitions, 2176 flow [2024-11-17 03:40:02,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 242 transitions, 2108 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-11-17 03:40:02,565 INFO L231 Difference]: Finished difference. Result has 136 places, 144 transitions, 1223 flow [2024-11-17 03:40:02,566 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=790, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1223, PETRI_PLACES=136, PETRI_TRANSITIONS=144} [2024-11-17 03:40:02,566 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 70 predicate places. [2024-11-17 03:40:02,566 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 144 transitions, 1223 flow [2024-11-17 03:40:02,566 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.6) internal successors, (163), 5 states have internal predecessors, (163), 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 03:40:02,566 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:40:02,567 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:40:02,567 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-17 03:40:02,567 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-17 03:40:02,567 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:40:02,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1923406809, now seen corresponding path program 1 times [2024-11-17 03:40:02,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:40:02,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502597523] [2024-11-17 03:40:02,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:40:02,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:40:02,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:40:02,601 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:40:02,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:40:02,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502597523] [2024-11-17 03:40:02,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502597523] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:40:02,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:40:02,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-17 03:40:02,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215245624] [2024-11-17 03:40:02,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:40:02,602 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:40:02,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:40:02,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:40:02,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:40:02,613 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 70 [2024-11-17 03:40:02,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 144 transitions, 1223 flow. Second operand has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:40:02,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:40:02,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 70 [2024-11-17 03:40:02,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:40:04,979 INFO L124 PetriNetUnfolderBase]: 15046/23347 cut-off events. [2024-11-17 03:40:04,980 INFO L125 PetriNetUnfolderBase]: For 95425/95733 co-relation queries the response was YES. [2024-11-17 03:40:05,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87508 conditions, 23347 events. 15046/23347 cut-off events. For 95425/95733 co-relation queries the response was YES. Maximal size of possible extension queue 725. Compared 162133 event pairs, 4035 based on Foata normal form. 703/23920 useless extension candidates. Maximal degree in co-relation 79751. Up to 10428 conditions per place. [2024-11-17 03:40:05,193 INFO L140 encePairwiseOnDemand]: 65/70 looper letters, 182 selfloop transitions, 9 changer transitions 0/215 dead transitions. [2024-11-17 03:40:05,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 215 transitions, 2316 flow [2024-11-17 03:40:05,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:40:05,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:40:05,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 153 transitions. [2024-11-17 03:40:05,195 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5464285714285714 [2024-11-17 03:40:05,195 INFO L175 Difference]: Start difference. First operand has 136 places, 144 transitions, 1223 flow. Second operand 4 states and 153 transitions. [2024-11-17 03:40:05,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 215 transitions, 2316 flow [2024-11-17 03:40:05,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 215 transitions, 2233 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-11-17 03:40:05,290 INFO L231 Difference]: Finished difference. Result has 136 places, 140 transitions, 1154 flow [2024-11-17 03:40:05,290 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=1136, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1154, PETRI_PLACES=136, PETRI_TRANSITIONS=140} [2024-11-17 03:40:05,291 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 70 predicate places. [2024-11-17 03:40:05,291 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 140 transitions, 1154 flow [2024-11-17 03:40:05,291 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:40:05,291 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:40:05,291 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:40:05,291 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-17 03:40:05,291 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-17 03:40:05,291 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:40:05,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1433996851, now seen corresponding path program 1 times [2024-11-17 03:40:05,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:40:05,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645209284] [2024-11-17 03:40:05,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:40:05,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:40:05,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:40:05,781 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:40:05,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:40:05,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645209284] [2024-11-17 03:40:05,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645209284] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:40:05,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731261640] [2024-11-17 03:40:05,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:40:05,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:40:05,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:40:05,783 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:40:05,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-17 03:40:05,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:40:05,850 INFO L255 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-17 03:40:05,854 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:40:05,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-17 03:40:06,379 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 52 [2024-11-17 03:40:06,386 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 43 treesize of output 41 [2024-11-17 03:40:06,389 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 41 treesize of output 39 [2024-11-17 03:40:06,446 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:40:06,446 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:40:06,523 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 79 treesize of output 77 [2024-11-17 03:40:06,528 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 77 treesize of output 75 [2024-11-17 03:40:07,444 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 183 treesize of output 169 [2024-11-17 03:40:07,484 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-17 03:40:07,484 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 222 treesize of output 232 [2024-11-17 03:40:10,844 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:40:10,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731261640] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:40:10,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:40:10,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2024-11-17 03:40:10,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519773997] [2024-11-17 03:40:10,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:40:10,845 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-17 03:40:10,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:40:10,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-17 03:40:10,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=876, Unknown=0, NotChecked=0, Total=992 [2024-11-17 03:40:12,202 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 70 [2024-11-17 03:40:12,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 140 transitions, 1154 flow. Second operand has 32 states, 32 states have (on average 26.625) internal successors, (852), 32 states have internal predecessors, (852), 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 03:40:12,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:40:12,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 70 [2024-11-17 03:40:12,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:40:16,046 INFO L124 PetriNetUnfolderBase]: 20182/31132 cut-off events. [2024-11-17 03:40:16,046 INFO L125 PetriNetUnfolderBase]: For 113829/114315 co-relation queries the response was YES. [2024-11-17 03:40:16,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114401 conditions, 31132 events. 20182/31132 cut-off events. For 113829/114315 co-relation queries the response was YES. Maximal size of possible extension queue 848. Compared 217859 event pairs, 2442 based on Foata normal form. 61/31075 useless extension candidates. Maximal degree in co-relation 102662. Up to 20072 conditions per place. [2024-11-17 03:40:16,424 INFO L140 encePairwiseOnDemand]: 55/70 looper letters, 192 selfloop transitions, 63 changer transitions 60/333 dead transitions. [2024-11-17 03:40:16,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 333 transitions, 3007 flow [2024-11-17 03:40:16,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-17 03:40:16,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-17 03:40:16,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 671 transitions. [2024-11-17 03:40:16,426 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47928571428571426 [2024-11-17 03:40:16,426 INFO L175 Difference]: Start difference. First operand has 136 places, 140 transitions, 1154 flow. Second operand 20 states and 671 transitions. [2024-11-17 03:40:16,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 333 transitions, 3007 flow [2024-11-17 03:40:16,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 333 transitions, 2963 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-17 03:40:16,606 INFO L231 Difference]: Finished difference. Result has 162 places, 173 transitions, 1654 flow [2024-11-17 03:40:16,606 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=1136, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1654, PETRI_PLACES=162, PETRI_TRANSITIONS=173} [2024-11-17 03:40:16,606 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 96 predicate places. [2024-11-17 03:40:16,607 INFO L471 AbstractCegarLoop]: Abstraction has has 162 places, 173 transitions, 1654 flow [2024-11-17 03:40:16,607 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 26.625) internal successors, (852), 32 states have internal predecessors, (852), 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 03:40:16,607 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:40:16,607 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:40:16,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-17 03:40:16,807 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2024-11-17 03:40:16,808 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-17 03:40:16,808 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:40:16,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1029457537, now seen corresponding path program 2 times [2024-11-17 03:40:16,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:40:16,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514598743] [2024-11-17 03:40:16,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:40:16,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:40:16,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:40:17,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:40:17,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:40:17,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514598743] [2024-11-17 03:40:17,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514598743] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:40:17,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089836510] [2024-11-17 03:40:17,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 03:40:17,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:40:17,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:40:17,295 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:40:17,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-17 03:40:17,370 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-17 03:40:17,370 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:40:17,371 INFO L255 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-17 03:40:17,374 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:40:17,440 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-17 03:40:17,806 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 50 treesize of output 48 [2024-11-17 03:40:17,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 45 [2024-11-17 03:40:17,813 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 36 treesize of output 34 [2024-11-17 03:40:17,855 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:40:17,855 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:40:17,922 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 79 treesize of output 77 [2024-11-17 03:40:17,930 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 77 treesize of output 75 [2024-11-17 03:40:18,828 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 169 treesize of output 157 [2024-11-17 03:40:18,855 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-17 03:40:18,856 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 202 treesize of output 218